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http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/source/documentation/latest/tutorial.md
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+Aurora Tutorial
+---------------
+
+- [Introduction](#introduction)
+- [Setup: Install Aurora](#setup-install-aurora)
+- [The Script](#the-script)
+- [Aurora Configuration](#aurora-configuration)
+- [What's Going On In That Configuration File?](#whats-going-on-in-that-configuration-file)
+- [Creating the Job](#creating-the-job)
+- [Watching the Job Run](#watching-the-job-run)
+- [Cleanup](#cleanup)
+- [Next Steps](#next-steps)
+
+## Introduction
+
+This tutorial shows how to use the Aurora scheduler to run (and
+"`printf-debug`") a hello world program on Mesos. The operational
+hierarchy is:
+
+- Aurora manages and schedules jobs for Mesos to run.
+- Mesos manages the individual tasks that make up a job.
+- Thermos manages the individual processes that make up a task.
+
+This is the recommended first Aurora users document to read to start
+getting up to speed on the system.
+
+To get help, email questions to the Aurora Developer List,
+[dev@aurora.incubator.apache.org](mailto:dev@aurora.incubator.apache.org)
+
+## Setup: Install Aurora
+
+You use the Aurora client and web UI to interact with Aurora jobs. To
+install it locally, see [vagrant.md](/documentation/latest/vagrant/). The remainder of this
+Tutorial assumes you are running Aurora using Vagrant. Unless otherwise stated,
+all commands are to be run from the root of the aurora repository clone.
+
+## The Script
+
+Our "hello world" application is a simple Python script that loops
+forever, displaying the time every few seconds. Copy the code below and
+put it in a file named `hello_world.py` in the root of your Aurora repository clone (Note:
+this directory is the same as `/vagrant` inside the Vagrant VMs).
+
+The script has an intentional bug, which we will explain later on.
+
+<!-- NOTE: If you are changing this file, be sure to also update examples/vagrant/test_tutorial.sh.
+-->
+```python
+import sys
+import time
+
+def main(argv):
+ SLEEP_DELAY = 10
+ # Python ninjas - ignore this blatant bug.
+ for i in xrang(100):
+ print("Hello world! The time is now: %s. Sleeping for %d secs" % (
+ time.asctime(), SLEEP_DELAY))
+ sys.stdout.flush()
+ time.sleep(SLEEP_DELAY)
+
+if __name__ == "__main__":
+ main(sys.argv)
+```
+
+## Aurora Configuration
+
+Once we have our script/program, we need to create a *configuration
+file* that tells Aurora how to manage and launch our Job. Save the below
+code in the file `hello_world.aurora`.
+
+<!-- NOTE: If you are changing this file, be sure to also update examples/vagrant/test_tutorial.sh.
+-->
+```python
+pkg_path = '/vagrant/hello_world.py'
+
+# we use a trick here to make the configuration change with
+# the contents of the file, for simplicity. in a normal setting, packages would be
+# versioned, and the version number would be changed in the configuration.
+import hashlib
+with open(pkg_path, 'rb') as f:
+ pkg_checksum = hashlib.md5(f.read()).hexdigest()
+
+# copy hello_world.py into the local sandbox
+install = Process(
+ name = 'fetch_package',
+ cmdline = 'cp %s . && echo %s && chmod +x hello_world.py' % (pkg_path, pkg_checksum))
+
+# run the script
+hello_world = Process(
+ name = 'hello_world',
+ cmdline = 'python hello_world.py')
+
+# describe the task
+hello_world_task = SequentialTask(
+ processes = [install, hello_world],
+ resources = Resources(cpu = 1, ram = 1*MB, disk=8*MB))
+
+jobs = [
+ Service(cluster = 'devcluster',
+ environment = 'devel',
+ role = 'www-data',
+ name = 'hello_world',
+ task = hello_world_task)
+]
+```
+
+For more about Aurora configuration files, see the [Configuration
+Tutorial](/documentation/latest/configuration-tutorial/) and the [Aurora + Thermos
+Reference](/documentation/latest/configuration-reference/) (preferably after finishing this
+tutorial).
+
+## What's Going On In That Configuration File?
+
+More than you might think.
+
+1. From a "big picture" viewpoint, it first defines two
+Processes. Then it defines a Task that runs the two Processes in the
+order specified in the Task definition, as well as specifying what
+computational and memory resources are available for them. Finally,
+it defines a Job that will schedule the Task on available and suitable
+machines. This Job is the sole member of a list of Jobs; you can
+specify more than one Job in a config file.
+
+2. At the Process level, it specifies how to get your code into the
+local sandbox in which it will run. It then specifies how the code is
+actually run once the second Process starts.
+
+## Creating the Job
+
+We're ready to launch our job! To do so, we use the Aurora Client to
+issue a Job creation request to the Aurora scheduler.
+
+Many Aurora Client commands take a *job key* argument, which uniquely
+identifies a Job. A job key consists of four parts, each separated by a
+"/". The four parts are `<cluster>/<role>/<environment>/<jobname>`
+in that order. When comparing two job keys, if any of the
+four parts is different from its counterpart in the other key, then the
+two job keys identify two separate jobs. If all four values are
+identical, the job keys identify the same job.
+
+`/etc/aurora/clusters.json` within the Aurora scheduler has the available
+cluster names. For Vagrant, from the top-level of your Aurora repository clone,
+do:
+
+ $ vagrant ssh
+
+Followed by:
+
+ vagrant@precise64:~$ cat /etc/aurora/clusters.json
+
+You'll see something like:
+
+```javascript
+[{
+ "name": "devcluster",
+ "zk": "192.168.33.7",
+ "scheduler_zk_path": "/aurora/scheduler",
+ "auth_mechanism": "UNAUTHENTICATED"
+}]
+```
+
+Use a `name` value for your job key's cluster value.
+
+Role names are user accounts existing on the slave machines. If you don't know what accounts
+are available, contact your sysadmin.
+
+Environment names are namespaces; you can count on `prod`, `devel` and `test` existing.
+
+The Aurora Client command that actually runs our Job is `aurora create`. It creates a Job as
+specified by its job key and configuration file arguments and runs it.
+
+ aurora create <cluster>/<role>/<environment>/<jobname> <config_file>
+
+Or for our example:
+
+ aurora create devcluster/www-data/devel/hello_world /vagrant/hello_world.aurora
+
+This returns:
+
+ $ vagrant ssh
+ Welcome to Ubuntu 12.04 LTS (GNU/Linux 3.2.0-23-generic x86_64)
+
+ * Documentation: https://help.ubuntu.com/
+ Welcome to your Vagrant-built virtual machine.
+ Last login: Fri Jan 3 02:18:55 2014 from 10.0.2.2
+ vagrant@precise64:~$ aurora create devcluster/www-data/devel/hello_world \
+ /vagrant/hello_world.aurora
+ INFO] Creating job hello_world
+ INFO] Response from scheduler: OK (message: 1 new tasks pending for job
+ www-data/devel/hello_world)
+ INFO] Job url: http://precise64:8081/scheduler/www-data/devel/hello_world
+
+## Watching the Job Run
+
+Now that our job is running, let's see what it's doing. Access the
+scheduler web interface at `http://$scheduler_hostname:$scheduler_port/scheduler`
+Or when using `vagrant`, `http://192.168.33.7:8081/scheduler`
+First we see what Jobs are scheduled:
+
+
+
+Click on your user name, which in this case was `www-data`, and we see the Jobs associated
+with that role:
+
+
+
+If you click on your `hello_world` Job, you'll see:
+
+
+
+Oops, looks like our first job didn't quite work! The task failed, so we have
+to figure out what went wrong.
+
+Access the page for our Task by clicking on its host.
+
+
+
+Once there, we see that the
+`hello_world` process failed. The Task page captures the standard error and
+standard output streams and makes them available. Clicking through
+to `stderr` on the failed `hello_world` process, we see what happened.
+
+
+
+It looks like we made a typo in our Python script. We wanted `xrange`,
+not `xrang`. Edit the `hello_world.py` script to use the correct function and
+we will try again.
+
+ aurora update devcluster/www-data/devel/hello_world /vagrant/hello_world.aurora
+
+This time, the task comes up, we inspect the page, and see that the
+`hello_world` process is running.
+
+
+
+We then inspect the output by clicking on `stdout` and see our process'
+output:
+
+
+
+## Cleanup
+
+Now that we're done, we kill the job using the Aurora client:
+
+ vagrant@precise64:~$ aurora killall devcluster/www-data/devel/hello_world
+ INFO] Killing tasks for job: devcluster/www-data/devel/hello_world
+ INFO] Response from scheduler: OK (message: Tasks killed.)
+ INFO] Job url: http://precise64:8081/scheduler/www-data/devel/hello_world
+ vagrant@precise64:~$
+
+The job page now shows the `hello_world` tasks as completed.
+
+
+
+## Next Steps
+
+Now that you've finished this Tutorial, you should read or do the following:
+
+- [The Aurora Configuration Tutorial](/documentation/latest/configuration-tutorial/), which provides more examples
+ and best practices for writing Aurora configurations. You should also look at
+ the [Aurora + Thermos Configuration Reference](/documentation/latest/configuration-reference/).
+- The [Aurora User Guide](/documentation/latest/user-guide/) provides an overview of how Aurora, Mesos, and
+ Thermos work "under the hood".
+- Explore the Aurora Client - use the `aurora help` subcommand, and read the
+ [Aurora Client Commands](/documentation/latest/client-commands/) document.
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/source/documentation/latest/user-guide.md
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+Aurora User Guide
+-----------------
+
+- [Overview](#user-content-overview)
+- [Job Lifecycle](#user-content-job-lifecycle)
+ - [Life Of A Task](#user-content-life-of-a-task)
+ - [PENDING to RUNNING states](#user-content-pending-to-running-states)
+ - [Task Updates](#user-content-task-updates)
+ - [HTTP Health Checking and Graceful Shutdown](#user-content-http-health-checking-and-graceful-shutdown)
+ - [Tearing a task down](#user-content-tearing-a-task-down)
+ - [Giving Priority to Production Tasks: PREEMPTING](#user-content-giving-priority-to-production-tasks-preempting)
+ - [Natural Termination: FINISHED, FAILED](#user-content-natural-termination-finished-failed)
+ - [Forceful Termination: KILLING, RESTARTING](#user-content-forceful-termination-killing-restarting)
+- [Service Discovery](#user-content-service-discovery)
+- [Configuration](#user-content-configuration)
+- [Creating Jobs](#user-content-creating-jobs)
+- [Interacting With Jobs](#user-content-interacting-with-jobs)
+
+Overview
+--------
+
+This document gives an overview of how Aurora works under the hood.
+It assumes you've already worked through the "hello world" example
+job in the [Aurora Tutorial](/documentation/latest/tutorial/). Specifics of how to use Aurora are **not**
+ given here, but pointers to documentation about how to use Aurora are
+provided.
+
+Aurora is a Mesos framework used to schedule *jobs* onto Mesos. Mesos
+cares about individual *tasks*, but typical jobs consist of dozens or
+hundreds of task replicas. Aurora provides a layer on top of Mesos with
+its `Job` abstraction. An Aurora `Job` consists of a task template and
+instructions for creating near-identical replicas of that task (modulo
+things like "instance id" or specific port numbers which may differ from
+machine to machine).
+
+How many tasks make up a Job is complicated. On a basic level, a Job consists of
+one task template and instructions for creating near-idential replicas of that task
+(otherwise referred to as "instances" or "shards").
+
+However, since Jobs can be updated on the fly, a single Job identifier or *job key*
+can have multiple job configurations associated with it.
+
+For example, consider when I have a Job with 4 instances that each
+request 1 core of cpu, 1 GB of RAM, and 1 GB of disk space as specified
+in the configuration file `hello_world.aurora`. I want to
+update it so it requests 2 GB of RAM instead of 1. I create a new
+configuration file to do that called `new_hello_world.aurora` and
+issue a `aurora update --shards=0-1 <job_key_value> new_hello_world.aurora`
+command.
+
+This results in instances 0 and 1 having 1 cpu, 2 GB of RAM, and 1 GB of disk space,
+while instances 2 and 3 have 1 cpu, 1 GB of RAM, and 1 GB of disk space. If instance 3
+dies and restarts, it restarts with 1 cpu, 1 GB RAM, and 1 GB disk space.
+
+So that means there are two simultaneous task configurations for the same Job
+at the same time, just valid for different ranges of instances.
+
+This isn't a recommended pattern, but it is valid and supported by the
+Aurora scheduler. This most often manifests in the "canary pattern" where
+instance 0 runs with a different configuration than instances 1-N to test
+different code versions alongside the actual production job.
+
+A task can merely be a single *process* corresponding to a single
+command line, such as `python2.6 my_script.py`. However, a task can also
+consist of many separate processes, which all run within a single
+sandbox. For example, running multiple cooperating agents together,
+such as `logrotate`, `installer`, master, or slave processes. This is
+where Thermos comes in. While Aurora provides a `Job` abstraction on
+top of Mesos `Tasks`, Thermos provides a `Process` abstraction
+underneath Mesos `Task`s and serves as part of the Aurora framework's
+executor.
+
+You define `Job`s,` Task`s, and `Process`es in a configuration file.
+Configuration files are written in Python, and make use of the Pystachio
+templating language. They end in a `.aurora` extension.
+
+Pystachio is a type-checked dictionary templating library.
+
+> TL;DR
+>
+> - Aurora manages jobs made of tasks.
+> - Mesos manages tasks made of processes.
+> - Thermos manages processes.
+> - All defined in `.aurora` configuration file.
+
+
+
+Each `Task` has a *sandbox* created when the `Task` starts and garbage
+collected when it finishes. All of a `Task'`s processes run in its
+sandbox, so processes can share state by using a shared current working
+directory.
+
+The sandbox garbage collection policy considers many factors, most
+importantly age and size. It makes a best-effort attempt to keep
+sandboxes around as long as possible post-task in order for service
+owners to inspect data and logs, should the `Task` have completed
+abnormally. But you can't design your applications assuming sandboxes
+will be around forever, e.g. by building log saving or other
+checkpointing mechanisms directly into your application or into your
+`Job` description.
+
+Job Lifecycle
+-------------
+
+When Aurora reads a configuration file and finds a `Job` definition, it:
+
+1. Evaluates the `Job` definition.
+2. Splits the `Job` into its constituent `Task`s.
+3. Sends those `Task`s to the scheduler.
+4. The scheduler puts the `Task`s into `PENDING` state, starting each
+ `Task`'s life cycle.
+
+### Life Of A Task
+
+
+
+### PENDING to RUNNING states
+
+When a `Task` is in the `PENDING` state, the scheduler constantly
+searches for machines satisfying that `Task`'s resource request
+requirements (RAM, disk space, CPU time) while maintaining configuration
+constraints such as "a `Task` must run on machines dedicated to a
+particular role" or attribute limit constraints such as "at most 2
+`Task`s from the same `Job` may run on each rack". When the scheduler
+finds a suitable match, it assigns the `Task` to a machine and puts the
+`Task` into the `ASSIGNED` state.
+
+From the `ASSIGNED` state, the scheduler sends an RPC to the slave
+machine containing `Task` configuration, which the slave uses to spawn
+an executor responsible for the `Task`'s lifecycle. When the scheduler
+receives an acknowledgement that the machine has accepted the `Task`,
+the `Task` goes into `STARTING` state.
+
+`STARTING` state initializes a `Task` sandbox. When the sandbox is fully
+initialized, Thermos begins to invoke `Process`es. Also, the slave
+machine sends an update to the scheduler that the `Task` is
+in `RUNNING` state.
+
+If a `Task` stays in `ASSIGNED` or `STARTING` for too long, the
+scheduler forces it into `LOST` state, creating a new `Task` in its
+place that's sent into `PENDING` state. This is technically true of any
+active state: if the Mesos core tells the scheduler that a slave has
+become unhealthy (or outright disappeared), the `Task`s assigned to that
+slave go into `LOST` state and new `Task`s are created in their place.
+From `PENDING` state, there is no guarantee a `Task` will be reassigned
+to the same machine unless job constraints explicitly force it there.
+
+If there is a state mismatch, (e.g. a machine returns from a `netsplit`
+and the scheduler has marked all its `Task`s `LOST` and rescheduled
+them), a state reconciliation process kills the errant `RUNNING` tasks,
+which may take up to an hour. But to emphasize this point: there is no
+uniqueness guarantee for a single instance of a job in the presence of
+network partitions. If the Task requires that, it should be baked in at
+the application level using a distributed coordination service such as
+Zookeeper.
+
+### Task Updates
+
+`Job` configurations can be updated at any point in their lifecycle.
+Usually updates are done incrementally using a process called a *rolling
+upgrade*, in which Tasks are upgraded in small groups, one group at a
+time. Updates are done using various Aurora Client commands.
+
+For a configuration update, the Aurora Client calculates required changes
+by examining the current job config state and the new desired job config.
+It then starts a rolling batched update process by going through every batch
+and performing these operations:
+
+- If an instance is present in the scheduler but isn't in the new config,
+ then that instance is killed.
+- If an instance is not present in the scheduler but is present in
+ the new config, then the instance is created.
+- If an instance is present in both the scheduler the new config, then
+ the client diffs both task configs. If it detects any changes, it
+ performs an instance update by killing the old config instance and adds
+ the new config instance.
+
+The Aurora client continues through the instance list until all tasks are
+updated, in `RUNNING,` and healthy for a configurable amount of time.
+If the client determines the update is not going well (a percentage of health
+checks have failed), it cancels the update.
+
+Update cancellation runs a procedure similar to the described above
+update sequence, but in reverse order. New instance configs are swapped
+with old instance configs and batch updates proceed backwards
+from the point where the update failed. E.g.; (0,1,2) (3,4,5) (6,7,
+8-FAIL) results in a rollback in order (8,7,6) (5,4,3) (2,1,0).
+
+### HTTP Health Checking and Graceful Shutdown
+
+The Executor implements a protocol for rudimentary control of a task via HTTP. Tasks subscribe for
+this protocol by declaring a port named `health`. Take for example this configuration snippet:
+
+ nginx = Process(
+ name = 'nginx',
+ cmdline = './run_nginx.sh -port {{thermos.ports[http]}}')
+
+When this Process is included in a job, the job will be allocated a port, and the command line
+will be replaced with something like:
+
+ ./run_nginx.sh -port 42816
+
+Where 42816 happens to be the allocated. port. Typically, the Executor monitors Processes within
+a task only by liveness of the forked process. However, when a `health` port was allocated, it will
+also send periodic HTTP health checks. A task requesting a `health` port must handle the following
+requests:
+
+| HTTP request | Description |
+| ------------ | ----------- |
+| `GET /health` | Inquires whether the task is healthy. |
+| `POST /quitquitquit` | Task should initiate graceful shutdown. |
+| `POST /abortabortabort` | Final warning task is being killed. |
+
+Please see the
+[configuration reference](configuration-reference.md#user-content-healthcheckconfig-objects) for
+configuration options for this feature.
+
+#### Snoozing Health Checks
+
+If you need to pause your health check, you can do so by touching a file inside of your sandbox,
+named `.healthchecksnooze`
+
+As long as that file is present, health checks will be disabled, enabling users to gather core dumps
+or other performance measurements without worrying about Aurora's health check killing their
+process.
+
+WARNING: Remember to remove this when you are done, otherwise your instance will have permanently
+disabled health checks.
+
+#### Tearing a task down
+
+The Executor follows an escalation sequence when killing a running task:
+
+ 1. If `health` port is not present, skip to (5)
+ 2. POST /quitquitquit
+ 3. wait 5 seconds
+ 4. POST /abortabortabort
+ 5. Send SIGTERM (`kill`)
+ 6. Send SIGKILL (`kill -9`)
+
+If the Executor notices that all Processes in a Task have aborted during this sequence, it will
+not proceed with subsequent steps. Note that graceful shutdown is best-effort, and due to the many
+inevitable realities of distributed systems, it may not be performed.
+
+### Giving Priority to Production Tasks: PREEMPTING
+
+Sometimes a Task needs to be interrupted, such as when a non-production
+Task's resources are needed by a higher priority production Task. This
+type of interruption is called a *pre-emption*. When this happens in
+Aurora, the non-production Task is killed and moved into
+the `PREEMPTING` state when both the following are true:
+
+- The task being killed is a non-production task.
+- The other task is a `PENDING` production task that hasn't been
+ scheduled due to a lack of resources.
+
+Since production tasks are much more important, Aurora kills off the
+non-production task to free up resources for the production task. The
+scheduler UI shows the non-production task was preempted in favor of the
+production task. At some point, tasks in `PREEMPTING` move to `KILLED`.
+
+Note that non-production tasks consuming many resources are likely to be
+preempted in favor of production tasks.
+
+### Natural Termination: FINISHED, FAILED
+
+A `RUNNING` `Task` can terminate without direct user interaction. For
+example, it may be a finite computation that finishes, even something as
+simple as `echo hello world. `Or it could be an exceptional condition in
+a long-lived service. If the `Task` is successful (its underlying
+processes have succeeded with exit status `0` or finished without
+reaching failure limits) it moves into `FINISHED` state. If it finished
+after reaching a set of failure limits, it goes into `FAILED` state.
+
+### Forceful Termination: KILLING, RESTARTING
+
+You can terminate a `Task` by issuing an `aurora kill` command, which
+moves it into `KILLING` state. The scheduler then sends the slave a
+request to terminate the `Task`. If the scheduler receives a successful
+response, it moves the Task into `KILLED` state and never restarts it.
+
+The scheduler has access to a non-public `RESTARTING` state. If a `Task`
+is forced into the `RESTARTING` state, the scheduler kills the
+underlying task but in parallel schedules an identical replacement for
+it.
+
+Configuration
+-------------
+
+You define and configure your Jobs (and their Tasks and Processes) in
+Aurora configuration files. Their filenames end with the `.aurora`
+suffix, and you write them in Python making use of the Pystachio
+templating language, along
+with specific Aurora, Mesos, and Thermos commands and methods. See the
+[Configuration Guide and Reference](/documentation/latest/configuration-reference/) and
+[Configuration Tutorial](/documentation/latest/configuration-tutorial/).
+
+Service Discovery
+-----------------
+
+It is possible for the Aurora executor to announce tasks into ServerSets for
+the purpose of service discovery. ServerSets use the Zookeeper [group membership pattern](http://zookeeper.apache.org/doc/trunk/recipes.html#sc_outOfTheBox)
+of which there are several reference implementations:
+
+ - [C++](https://github.com/apache/mesos/blob/master/src/zookeeper/group.cpp)
+ - [Java](https://github.com/twitter/commons/blob/master/src/java/com/twitter/common/zookeeper/ServerSetImpl.java#L221)
+ - [Python](https://github.com/twitter/commons/blob/master/src/python/twitter/common/zookeeper/serverset/serverset.py#L51)
+
+These can also be used natively in Finagle using the [ZookeeperServerSetCluster](https://github.com/twitter/finagle/blob/master/finagle-serversets/src/main/scala/com/twitter/finagle/zookeeper/ZookeeperServerSetCluster.scala).
+
+For more information about how to configure announcing, see the [Configuration Reference](/documentation/latest/configuration-reference/).
+
+Creating Jobs
+-------------
+
+You create and manipulate Aurora Jobs with the Aurora client, which starts all its
+command line commands with
+`aurora`. See [Aurora Client Commands](/documentation/latest/client-commands/) for details
+about the Aurora Client.
+
+Interacting With Jobs
+---------------------
+
+You interact with Aurora jobs either via:
+
+- Read-only Web UIs
+
+ Part of the output from creating a new Job is a URL for the Job's scheduler UI page.
+
+ For example:
+
+ vagrant@precise64:~$ aurora create devcluster/www-data/prod/hello \
+ /vagrant/examples/jobs/hello_world.aurora
+ INFO] Creating job hello
+ INFO] Response from scheduler: OK (message: 1 new tasks pending for job www-data/prod/hello)
+ INFO] Job url: http://precise64:8081/scheduler/www-data/prod/hello
+
+ The "Job url" goes to the Job's scheduler UI page. To go to the overall scheduler UI page,
+ stop at the "scheduler" part of the URL, in this case, `http://precise64:8081/scheduler`
+
+ You can also reach the scheduler UI page via the Client command `aurora open`:
+
+ aurora open [<cluster>[/<role>[/<env>/<job_name>]]]
+
+ If only the cluster is specified, it goes directly to that cluster's scheduler main page.
+ If the role is specified, it goes to the top-level role page. If the full job key is specified,
+ it goes directly to the job page where you can inspect individual tasks.
+
+ Once you click through to a role page, you see Jobs arranged separately by pending jobs, active
+ jobs, and finished jobs. Jobs are arranged by role, typically a service account for production
+ jobs and user accounts for test or development jobs.
+
+- The Aurora Client's command line interface
+
+ Several Client commands have a `-o` option that automatically opens a window to
+ the specified Job's scheduler UI URL. And, as described above, the `open` command also takes
+ you there.
+
+ For a complete list of Aurora Client commands, use `aurora help` and, for specific
+ command help, `aurora help [command]`. **Note**: `aurora help open`
+ returns `"subcommand open not found"` due to our reflection tricks not
+ working on words that are also builtin Python function names. Or see the
+ [Aurora Client Commands](/documentation/latest/client-commands/) document.
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/source/documentation/latest/vagrant.md
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diff --git a/source/documentation/latest/vagrant.md b/source/documentation/latest/vagrant.md
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+Getting Started
+===============
+To replicate a real cluster environment as closely as possible, we use
+[Vagrant](http://www.vagrantup.com/) to launch a complete Aurora cluster in a virtual machine.
+
+Prerequisites
+-------------
+ * [VirtualBox](https://www.virtualbox.org/)
+ * [Vagrant](http://www.vagrantup.com/)
+ * A clone of the Aurora repository, or source distribution.
+
+You can start a local cluster by running:
+
+ vagrant up
+
+Once started, several services should be running:
+
+ * scheduler is listening on http://192.168.33.7:8081
+ * observer is listening on http://192.168.33.7:1338
+ * master is listening on http://192.168.33.7:5050
+ * slave is listening on http://192.168.33.7:5051
+
+You can SSH into the machine with `vagrant ssh` and execute aurora client commands using the
+`aurora` command. A pre-installed `clusters.json` file refers to your local cluster as
+`devcluster`, which you will use in client commands.
+
+Deleting your local cluster
+===========================
+Once you are finished with your local cluster, or if you would otherwise like to start from scratch,
+you can use the command `vagrant destroy` to turn off and delete the virtual file system.
+
+
+Rebuilding components
+=====================
+If you are changing Aurora code and would like to rebuild a component, you can use the `aurorabuild`
+command on your vagrant machine to build and restart a component. This is considerably faster than
+destroying and rebuilding your VM.
+
+`aurorabuild` accepts a list of components to build and update. You may invoke the command with
+no arguments to get a list of supported components.
+
+ vagrant ssh -c 'aurorabuild client'
+
+
+Troubleshooting
+===============
+Most of the vagrant related problems can be fixed by the following steps:
+* Destroying the vagrant environment with `vagrant destroy`
+* Killing any orphaned VMs (see AURORA-499) with `virtualbox` UI or `VBoxManage` command line tool
+* Cleaning the repository of build artifacts and other intermediate output with `git clean -fdx`
+* Bringing up the vagrant environment with `vagrant up`
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/source/downloads.html.md
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diff --git a/source/downloads.html.md b/source/downloads.html.md
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+# Download Aurora
+
+## Current Release
+
+The current released version is *0.6.0-incubating*. [(.tar.gz)](https://dist.apache.org/repos/dist/release/incubator/aurora/0.6.0/apache-aurora-0.6.0-incubating.tar.gz)
+[(md5)](https://dist.apache.org/repos/dist/release/incubator/aurora/0.6.0/apache-aurora-0.6.0-incubating.tar.gz.md5)
+[(sha)](https://dist.apache.org/repos/dist/release/incubator/aurora/0.6.0/apache-aurora-0.6.0-incubating.tar.gz.sha)
+[(sig)](https://dist.apache.org/repos/dist/release/incubator/aurora/0.6.0/apache-aurora-0.6.0-incubating.tar.gz.asc)
+
+To quickly get started, we reccomend using Vagrant and following the [Getting Started guide](http://localhost:4567/documentation/latest/vagrant/).
+
+## Previous Releases
+*0.5.0-incubating* [(.tar.gz)](https://dist.apache.org/repos/dist/release/incubator/aurora/0.5.0/apache-aurora-0.5.0-incubating.tar.gz)
+[(md5)](https://dist.apache.org/repos/dist/release/incubator/aurora/0.5.0/apache-aurora-0.5.0-incubating.tar.gz.md5)
+[(sha)](https://dist.apache.org/repos/dist/release/incubator/aurora/0.5.0/apache-aurora-0.5.0-incubating.tar.gz.sha)
+[(sig)](https://dist.apache.org/repos/dist/release/incubator/aurora/0.5.0/apache-aurora-0.5.0-incubating.tar.gz.asc)
+
+## Git
+
+The latest code is available in git via:
+
+ git clone http://git.apache.org/incubator-aurora.git
+
+You can browse the repo on
+[Apache Git](https://git-wip-us.apache.org/repos/asf?p=incubator-aurora.git)
+and the [Github mirror](https://github.com/apache/incubator-aurora).
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/source/index.html.md
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+<div class="container-fluid section-ltgreen buffer">
+ <div class="container">
+ <div class="row">
+ <div class="col-md-5 col-md-offset-1"><h2>What does Aurora do?</h2><p>Aurora runs applications and services across a shared pool of machines, and is responsible for keeping them running, forever. When machines experience failure, Aurora intelligently reschedules those jobs onto healthy machines.</p></div>
+ <div class="col-md-4 col-md-offset-1">
+ <iframe
+ width="420" height="236"
+ src="http://www.youtube-nocookie.com/embed/asd_h6VzaJc?rel=0&start=119&controls=0"
+ allowfullscreen></iframe></div>
+ </div>
+ </div>
+</div>
+<div class="container-fluid buffer">
+ <div class="container">
+ <h2 class="text-center">Key Aurora Features</h2>
+ <div class="row">
+ <div class="col-md-2 text-center"><p><span class="glyphicon glyphicon-tasks"></span></p></div>
+ <div class="col-md-4"><h3>Rolling Updates with Automatic Rollback</h3><p>When updating a job, Aurora will detect the health and status of a deployment and automatically rollback if necessary.</p></div>
+ <div class="col-md-2 text-center"><p><span class="glyphicon glyphicon-th"></span></p></div>
+ <div class="col-md-4"><h3>Resource Quota and Multi-User Support</h3><p>Aurora has a quota system to provide guaranteed resources for specific applications, and can support multiple users to deploy services.</p></div>
+ </div>
+ <div class="row">
+ <div class="col-md-2 text-center"><p><span class="glyphicon glyphicon-list-alt"></span></p></div>
+ <div class="col-md-4"><h3>Sophisticated DSL</h3><p>Services are highly-configurable via a <a href="/documentation/latest/configuration-tutorial">DSL</a> which supports templating, allowing you to establish common patterns and avoid redundant configurations.</p></div>
+ <div class="col-md-2 text-center"><p><span class="glyphicon glyphicon-cloud-upload"></span></p></div>
+ <div class="col-md-4"><h3>Service Registration</h3><p>Aurora <a href="/documentation/latest/configuration-reference/#announcer-objects">announces</a> services to Apache ZooKeeper for discovery by clients like Finagle.</p></div>
+ </div>
+ </div>
+</div>
\ No newline at end of file
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+<% content_for :page_title do %>
+Documentation
+<% end %>
+<% wrap_layout :layout do %>
+<div class="container-fluid">
+ <div class="container">
+ <div class="row">
+ <div class="col-md-10 col-md-offset-1">
+ <%= yield %>
+ </div>
+ </row>
+ </div>
+</div>
+<% end %>
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/source/layouts/layout.erb
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+<!DOCTYPE html>
+<html lang="en">
+ <head>
+ <meta charset="utf-8">
+ <meta name="viewport" content="width=device-width, initial-scale=1">
+ <title>Apache Aurora</title>
+ <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css">
+ <link href="/assets/css/main.css" rel="stylesheet">
+ <!-- Analytics -->
+ <script type="text/javascript">
+ var _gaq = _gaq || [];
+ _gaq.push(['_setAccount', 'UA-45879646-1']);
+ _gaq.push(['_setDomainName', 'apache.org']);
+ _gaq.push(['_trackPageview']);
+
+ (function() {
+ var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
+ ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
+ var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
+ })();
+ </script>
+ </head>
+ <body>
+ <% if current_page.url == "/" %>
+ <%= partial "header_homepage" %>
+ <%= yield %>
+ <% else %>
+ <%= partial "header_normal" %>
+ <div class="container-fluid">
+ <div class="container content">
+ <%= yield %>
+ </div>
+ </div>
+ <% end %>
+ <%= partial "footer" %>
+ </body>
+</html>
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/source/layouts/post.erb
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+++ b/source/layouts/post.erb
@@ -0,0 +1,40 @@
+<% content_for :page_title do %>
+Apache Aurora Blog
+<% end %>
+<% wrap_layout :layout do %>
+<div class="container-fluid">
+
+<div class="row">
+<div class="col-md-3 buffer">
+ <div class="meta">
+ <span class="author">
+ <% if current_page.data.post_author.gravatar %>
+ <img src="http://www.gravatar.com/avatar/<%= current_page.data.post_author.gravatar %>?s=80" class="author_gravatar">
+ <% end %>
+ <span class="author_contact">
+ <p><strong><%= current_page.data.post_author.display_name %></strong></p>
+ <p><a href="http://twitter.com/<%= current_page.data.post_author.twitter %>">@<%= current_page.data.post_author.twitter %></a></p>
+ </span>
+ </span>
+ <p><em>Posted <%= current_article.date.strftime("%B %e, %Y") %></em></p>
+ </div>
+
+ <div class="share">
+ <span class="social-share-button"><a href="https://twitter.com/share" class="twitter-share-button" data-via="apachemesos">Tweet</a></span>
+
+ <span><script>!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0],p=/^http:/.test(d.location)?'http':'https';if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src=p+'://platform.twitter.com/widgets.js';fjs.parentNode.insertBefore(js,fjs);}}(document, 'script', 'twitter-wjs');</script></span>
+
+ <script src="//platform.linkedin.com/in.js" type="text/javascript">
+ lang: en_US
+ </script>
+ <script type="IN/Share" data-counter="right"></script>
+ </div>
+</div>
+
+<div class="post col-md-9">
+ <h1><%= current_page.data.title %></h1>
+
+ <%= yield %>
+</div>
+</div>
+<% end %>
\ No newline at end of file
[12/18] incubator-aurora-website git commit: Initial move of website
over to git
Posted by jf...@apache.org.
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/publish/documentation/latest/configuration-tutorial/index.html
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diff --git a/publish/documentation/latest/configuration-tutorial/index.html b/publish/documentation/latest/configuration-tutorial/index.html
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@@ -0,0 +1,1218 @@
+<!DOCTYPE html>
+<html lang="en">
+ <head>
+ <meta charset="utf-8">
+ <meta name="viewport" content="width=device-width, initial-scale=1">
+ <title>Apache Aurora</title>
+ <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css">
+ <link href="/assets/css/main.css" rel="stylesheet">
+ <!-- Analytics -->
+ <script type="text/javascript">
+ var _gaq = _gaq || [];
+ _gaq.push(['_setAccount', 'UA-45879646-1']);
+ _gaq.push(['_setDomainName', 'apache.org']);
+ _gaq.push(['_trackPageview']);
+
+ (function() {
+ var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
+ ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
+ var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
+ })();
+ </script>
+ </head>
+ <body>
+
+ <div class="container-fluid section-header">
+ <div class="container">
+ <div class="nav nav-bar">
+ <a href="/"><img src="/assets/img/aurora_logo_white_bkg.svg" width="300" alt="Transparent Apache Aurora logo with dark background"/></a>
+ <ul class="nav navbar-nav navbar-right">
+ <li><a href="/documentation/latest/">Documentation</a></li>
+ <li><a href="/community/">Community</a></li>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/blog/">Blog</a></li>
+ </ul>
+ </div>
+ </div>
+</div>
+ <div class="container-fluid">
+ <div class="container content">
+ <h1 id="aurora-configuration-tutorial">Aurora Configuration Tutorial</h1>
+
+<p>How to write Aurora configuration files, including feature descriptions
+and best practices. When writing a configuration file, make use of
+<code>aurora inspect</code>. It takes the same job key and configuration file
+arguments as <code>aurora create</code> or <code>aurora update</code>. It first ensures the
+configuration parses, then outputs it in human-readable form.</p>
+
+<p>You should read this after going through the general <a href="/documentation/latest/tutorial/">Aurora Tutorial</a>.</p>
+
+<ul>
+<li><a href="#user-content-aurora-configuration-tutorial">Aurora Configuration Tutorial</a>
+
+<ul>
+<li><a href="#user-content-the-basics">The Basics</a>
+
+<ul>
+<li><a href="#user-content-use-bottom-to-top-object-ordering">Use Bottom-To-Top Object Ordering</a></li>
+</ul></li>
+<li><a href="#user-content-an-example-configuration-file">An Example Configuration File</a></li>
+<li><a href="#user-content-defining-process-objects">Defining Process Objects</a></li>
+<li><a href="#user-content-getting-your-code-into-the-sandbox">Getting Your Code Into The Sandbox</a></li>
+<li><a href="#user-content-defining-task-objects">Defining Task Objects</a>
+
+<ul>
+<li><a href="#user-content-sequentialtask-running-processes-in-parallel-or-sequentially">SequentialTask: Running Processes in Parallel or Sequentially</a></li>
+<li><a href="#user-content-simpletask">SimpleTask</a></li>
+<li><a href="#user-content-combining-tasks">Combining tasks</a></li>
+</ul></li>
+<li><a href="#user-content-defining-job-objects">Defining Job Objects</a></li>
+<li><a href="#user-content-the-jobs-list">The jobs List</a></li>
+<li><a href="#user-content-templating">Templating</a>
+
+<ul>
+<li><a href="#user-content-templating-1-binding-in-pystachio">Templating 1: Binding in Pystachio</a></li>
+<li><a href="#user-content-structurals-in-pystachio--aurora">Structurals in Pystachio / Aurora</a>
+
+<ul>
+<li><a href="#user-content-mustaches-within-structurals">Mustaches Within Structurals</a></li>
+</ul></li>
+<li><a href="#user-content-templating-2-structurals-are-factories">Templating 2: Structurals Are Factories</a>
+
+<ul>
+<li><a href="#user-content-a-second-way-of-templating">A Second Way of Templating</a></li>
+</ul></li>
+<li><a href="#user-content-advanced-binding">Advanced Binding</a>
+
+<ul>
+<li><a href="#user-content-bind-syntax">Bind Syntax</a></li>
+<li><a href="#user-content-binding-complex-objects">Binding Complex Objects</a>
+
+<ul>
+<li><a href="#user-content-lists"></a></li>
+<li><a href="#user-content-maps"></a></li>
+<li><a href="#user-content-structurals"></a></li>
+</ul></li>
+</ul></li>
+<li><a href="#user-content-structural-binding">Structural Binding</a></li>
+</ul></li>
+<li><a href="#user-content-configuration-file-writing-tips-and-best-practices">Configuration File Writing Tips And Best Practices</a>
+
+<ul>
+<li><a href="#user-content-use-as-few-aurora-files-as-possible">Use As Few .aurora Files As Possible</a></li>
+<li><a href="#user-content-avoid-boilerplate">Avoid Boilerplate</a></li>
+<li><a href="#user-content-thermos-uses-bash-but-thermos-is-not-bash">Thermos Uses bash, But Thermos Is Not bash</a>
+
+<ul>
+<li><a href="#user-content-bad">Bad</a></li>
+<li><a href="#user-content-good">Good</a></li>
+</ul></li>
+<li><a href="#user-content-rarely-use-functions-in-your-configurations">Rarely Use Functions In Your Configurations</a>
+
+<ul>
+<li><a href="#user-content-bad-1">Bad</a></li>
+<li><a href="#user-content-good-1">Good</a></li>
+</ul></li>
+</ul></li>
+</ul></li>
+</ul>
+
+<h2 id="the-basics">The Basics</h2>
+
+<p>To run a job on Aurora, you must specify a configuration file that tells
+Aurora what it needs to know to schedule the job, what Mesos needs to
+run the tasks the job is made up of, and what Thermos needs to run the
+processes that make up the tasks. This file must have
+a<code>.aurora</code> suffix.</p>
+
+<p>A configuration file defines a collection of objects, along with parameter
+values for their attributes. An Aurora configuration file contains the
+following three types of objects:</p>
+
+<ul>
+<li>Job</li>
+<li>Task</li>
+<li>Process</li>
+</ul>
+
+<p>A configuration also specifies a list of <code>Job</code> objects assigned
+to the variable <code>jobs</code>.</p>
+
+<ul>
+<li>jobs (list of defined Jobs to run)</li>
+</ul>
+
+<p>The <code>.aurora</code> file format is just Python. However, <code>Job</code>, <code>Task</code>,
+<code>Process</code>, and other classes are defined by a type-checked dictionary
+templating library called <em>Pystachio</em>, a powerful tool for
+configuration specification and reuse. Pystachio objects are tailored
+via {{}} surrounded templates.</p>
+
+<p>When writing your <code>.aurora</code> file, you may use any Pystachio datatypes, as
+well as any objects shown in the <a href="/documentation/latest/configuration-reference/"><em>Aurora+Thermos Configuration
+Reference</em></a>, without <code>import</code> statements - the
+Aurora config loader injects them automatically. Other than that, an <code>.aurora</code>
+file works like any other Python script.</p>
+
+<p><a href="/documentation/latest/configuration-reference/"><em>Aurora+Thermos Configuration Reference</em></a>
+has a full reference of all Aurora/Thermos defined Pystachio objects.</p>
+
+<h3 id="use-bottom-to-top-object-ordering">Use Bottom-To-Top Object Ordering</h3>
+
+<p>A well-structured configuration starts with structural templates (if
+any). Structural templates encapsulate in their attributes all the
+differences between Jobs in the configuration that are not directly
+manipulated at the <code>Job</code> level, but typically at the <code>Process</code> or <code>Task</code>
+level. For example, if certain processes are invoked with slightly
+different settings or input.</p>
+
+<p>After structural templates, define, in order, <code>Process</code>es, <code>Task</code>s, and
+<code>Job</code>s.</p>
+
+<p>Structural template names should be <em>UpperCamelCased</em> and their
+instantiations are typically <em>UPPER_SNAKE_CASED</em>. <code>Process</code>, <code>Task</code>,
+and <code>Job</code> names are typically <em>lower_snake_cased</em>. Indentation is typically 2
+spaces.</p>
+
+<h2 id="an-example-configuration-file">An Example Configuration File</h2>
+
+<p>The following is a typical configuration file. Don’t worry if there are
+parts you don’t understand yet, but you may want to refer back to this
+as you read about its individual parts. Note that names surrounded by
+curly braces {{}} are template variables, which the system replaces with
+bound values for the variables.</p>
+<pre class="highlight text"># --- templates here ---
+class Profile(Struct):
+ package_version = Default(String, 'live')
+ java_binary = Default(String, '/usr/lib/jvm/java-1.7.0-openjdk/bin/java')
+ extra_jvm_options = Default(String, '')
+ parent_environment = Default(String, 'prod')
+ parent_serverset = Default(String,
+ '/foocorp/service/bird/{{parent_environment}}/bird')
+
+# --- processes here ---
+main = Process(
+ name = 'application',
+ cmdline = '{{profile.java_binary}} -server -Xmx1792m '
+ '{{profile.extra_jvm_options}} '
+ '-jar application.jar '
+ '-upstreamService {{profile.parent_serverset}}'
+)
+
+# --- tasks ---
+base_task = SequentialTask(
+ name = 'application',
+ processes = [
+ Process(
+ name = 'fetch',
+ cmdline = 'curl -O
+ https://packages.foocorp.com/{{profile.package_version}}/application.jar'),
+ ]
+)
+
+ # not always necessary but often useful to have separate task
+ # resource classes
+ staging_task = base_task(resources =
+ Resources(cpu = 1.0,
+ ram = 2048*MB,
+ disk = 1*GB))
+production_task = base_task(resources =
+ Resources(cpu = 4.0,
+ ram = 2560*MB,
+ disk = 10*GB))
+
+# --- job template ---
+job_template = Job(
+ name = 'application',
+ role = 'myteam',
+ contact = 'myteam-team@foocorp.com',
+ instances = 20,
+ service = True,
+ task = production_task
+)
+
+# -- profile instantiations (if any) ---
+PRODUCTION = Profile()
+STAGING = Profile(
+ extra_jvm_options = '-Xloggc:gc.log',
+ parent_environment = 'staging'
+)
+
+# -- job instantiations --
+jobs = [
+ job_template(cluster = 'cluster1', environment = 'prod')
+ .bind(profile = PRODUCTION),
+
+ job_template(cluster = 'cluster2', environment = 'prod')
+ .bind(profile = PRODUCTION),
+
+ job_template(cluster = 'cluster1',
+ environment = 'staging',
+ service = False,
+ task = staging_task,
+ instances = 2)
+ .bind(profile = STAGING),
+]
+</pre>
+<h2 id="defining-process-objects">Defining Process Objects</h2>
+
+<p>Processes are handled by the Thermos system. A process is a single
+executable step run as a part of an Aurora task, which consists of a
+bash-executable statement.</p>
+
+<p>The key (and required) <code>Process</code> attributes are:</p>
+
+<ul>
+<li> <code>name</code>: Any string which is a valid Unix filename (no slashes,
+NULLs, or leading periods). The <code>name</code> value must be unique relative
+to other Processes in a <code>Task</code>.</li>
+<li> <code>cmdline</code>: A command line run in a bash subshell, so you can use
+bash scripts. Nothing is supplied for command-line arguments,
+so <code>$*</code> is unspecified.</li>
+</ul>
+
+<p>Many tiny processes make managing configurations more difficult. For
+example, the following is a bad way to define processes.</p>
+<pre class="highlight text">copy = Process(
+ name = 'copy',
+ cmdline = 'curl -O https://packages.foocorp.com/app.zip'
+)
+unpack = Process(
+ name = 'unpack',
+ cmdline = 'unzip app.zip'
+)
+remove = Process(
+ name = 'remove',
+ cmdline = 'rm -f app.zip'
+)
+run = Process(
+ name = 'app',
+ cmdline = 'java -jar app.jar'
+)
+run_task = Task(
+ processes = [copy, unpack, remove, run],
+ constraints = order(copy, unpack, remove, run)
+)
+</pre>
+<p>Since <code>cmdline</code> runs in a bash subshell, you can chain commands
+with <code>&&</code> or <code>||</code>.</p>
+
+<p>When defining a <code>Task</code> that is just a list of Processes run in a
+particular order, use <code>SequentialTask</code>, as described in the <a href="#Task"><em>Defining</em>
+<code>Task</code> <em>Objects</em></a> section. The following simplifies and combines the
+above multiple <code>Process</code> definitions into just two.</p>
+<pre class="highlight text">stage = Process(
+ name = 'stage',
+ cmdline = 'curl -O https://packages.foocorp.com/app.zip && '
+ 'unzip app.zip && rm -f app.zip')
+
+run = Process(name = 'app', cmdline = 'java -jar app.jar')
+
+run_task = SequentialTask(processes = [stage, run])
+</pre>
+<p><code>Process</code> also has five optional attributes, each with a default value
+if one isn’t specified in the configuration:</p>
+
+<ul>
+<li><p><code>max_failures</code>: Defaulting to <code>1</code>, the maximum number of failures
+(non-zero exit statuses) before this <code>Process</code> is marked permanently
+failed and not retried. If a <code>Process</code> permanently fails, Thermos
+checks the <code>Process</code> object’s containing <code>Task</code> for the task’s
+failure limit (usually 1) to determine whether or not the <code>Task</code>
+should be failed. Setting <code>max_failures</code>to <code>0</code> means that this
+process will keep retrying until a successful (zero) exit status is
+achieved. Retries happen at most once every <code>min_duration</code> seconds
+to prevent effectively mounting a denial of service attack against
+the coordinating scheduler.</p></li>
+<li><p><code>daemon</code>: Defaulting to <code>False</code>, if <code>daemon</code> is set to <code>True</code>, a
+successful (zero) exit status does not prevent future process runs.
+Instead, the <code>Process</code> reinvokes after <code>min_duration</code> seconds.
+However, the maximum failure limit (<code>max_failures</code>) still
+applies. A combination of <code>daemon=True</code> and <code>max_failures=0</code> retries
+a <code>Process</code> indefinitely regardless of exit status. This should
+generally be avoided for very short-lived processes because of the
+accumulation of checkpointed state for each process run. When
+running in Aurora, <code>max_failures</code> is capped at
+100.</p></li>
+<li><p><code>ephemeral</code>: Defaulting to <code>False</code>, if <code>ephemeral</code> is <code>True</code>, the
+<code>Process</code>‘ status is not used to determine if its bound <code>Task</code> has
+completed. For example, consider a <code>Task</code> with a
+non-ephemeral webserver process and an ephemeral logsaver process
+that periodically checkpoints its log files to a centralized data
+store. The <code>Task</code> is considered finished once the webserver process
+finishes, regardless of the logsaver’s current status.</p></li>
+<li><p><code>min_duration</code>: Defaults to <code>15</code>. Processes may succeed or fail
+multiple times during a single Task. Each result is called a
+<em>process run</em> and this value is the minimum number of seconds the
+scheduler waits before re-running the same process.</p></li>
+<li><p><code>final</code>: Defaulting to <code>False</code>, this is a finalizing <code>Process</code> that
+should run last. Processes can be grouped into two classes:
+<em>ordinary</em> and <em>finalizing</em>. By default, Thermos Processes are
+ordinary. They run as long as the <code>Task</code> is considered
+healthy (i.e. hasn’t reached a failure limit). But once all regular
+Thermos Processes have either finished or the <code>Task</code> has reached a
+certain failure threshold, Thermos moves into a <em>finalization</em> stage
+and runs all finalizing Processes. These are typically necessary for
+cleaning up after the <code>Task</code>, such as log checkpointers, or perhaps
+e-mail notifications of a completed Task. Finalizing processes may
+not depend upon ordinary processes or vice-versa, however finalizing
+processes may depend upon other finalizing processes and will
+otherwise run as a typical process schedule.</p></li>
+</ul>
+
+<h2 id="getting-your-code-into-the-sandbox">Getting Your Code Into The Sandbox</h2>
+
+<p>When using Aurora, you need to get your executable code into its “sandbox”, specifically
+the Task sandbox where the code executes for the Processes that make up that Task.</p>
+
+<p>Each Task has a sandbox created when the Task starts and garbage
+collected when it finishes. All of a Task’s processes run in its
+sandbox, so processes can share state by using a shared current
+working directory.</p>
+
+<p>Typically, you save this code somewhere. You then need to define a Process
+in your <code>.aurora</code> configuration file that fetches the code from that somewhere
+to where the slave can see it. For a public cloud, that can be anywhere public on
+the Internet, such as S3. For a private cloud internal storage, you need to put in
+on an accessible HDFS cluster or similar storage.</p>
+
+<p>The template for this Process is:</p>
+<pre class="highlight text"><name> = Process(
+ name = '<name>'
+ cmdline = '<command to copy and extract code archive into current working directory>'
+)
+</pre>
+<p>Note: Be sure the extracted code archive has an executable.</p>
+
+<h2 id="defining-task-objects">Defining Task Objects</h2>
+
+<p>Tasks are handled by Mesos. A task is a collection of processes that
+runs in a shared sandbox. It’s the fundamental unit Aurora uses to
+schedule the datacenter; essentially what Aurora does is find places
+in the cluster to run tasks.</p>
+
+<p>The key (and required) parts of a Task are:</p>
+
+<ul>
+<li><p><code>name</code>: A string giving the Task’s name. By default, if a Task is
+not given a name, it inherits the first name in its Process list.</p></li>
+<li><p><code>processes</code>: An unordered list of Process objects bound to the Task.
+The value of the optional <code>constraints</code> attribute affects the
+contents as a whole. Currently, the only constraint, <code>order</code>, determines if
+the processes run in parallel or sequentially.</p></li>
+<li><p><code>resources</code>: A <code>Resource</code> object defining the Task’s resource
+ footprint. A <code>Resource</code> object has three attributes:
+ - <code>cpu</code>: A Float, the fractional number of cores the Task
+ requires.
+ - <code>ram</code>: An Integer, RAM bytes the Task requires.
+ - <code>disk</code>: An integer, disk bytes the Task requires.</p></li>
+</ul>
+
+<p>A basic Task definition looks like:</p>
+<pre class="highlight text">Task(
+ name="hello_world",
+ processes=[Process(name = "hello_world", cmdline = "echo hello world")],
+ resources=Resources(cpu = 1.0,
+ ram = 1*GB,
+ disk = 1*GB))
+</pre>
+<p>There are four optional Task attributes:</p>
+
+<ul>
+<li><p><code>constraints</code>: A list of <code>Constraint</code> objects that constrain the
+Task’s processes. Currently there is only one type, the <code>order</code>
+constraint. For example the following requires that the processes
+run in the order <code>foo</code>, then <code>bar</code>.</p>
+<pre class="highlight text">constraints = [Constraint(order=['foo', 'bar'])]
+</pre>
+<p>There is an <code>order()</code> function that takes <code>order('foo', 'bar', 'baz')</code>
+and converts it into <code>[Constraint(order=['foo', 'bar', 'baz'])]</code>.
+<code>order()</code> accepts Process name strings <code>('foo', 'bar')</code> or the processes
+themselves, e.g. <code>foo=Process(name='foo', ...)</code>, <code>bar=Process(name='bar', ...)</code>,
+<code>constraints=order(foo, bar)</code></p>
+
+<p>Note that Thermos rejects tasks with process cycles.</p></li>
+<li><p><code>max_failures</code>: Defaulting to <code>1</code>, the number of failed processes
+needed for the <code>Task</code> to be marked as failed. Note how this
+interacts with individual Processes’ <code>max_failures</code> values. Assume a
+Task has two Processes and a <code>max_failures</code> value of <code>2</code>. So both
+Processes must fail for the Task to fail. Now, assume each of the
+Task’s Processes has its own <code>max_failures</code> value of <code>10</code>. If
+Process “A” fails 5 times before succeeding, and Process “B” fails
+10 times and is then marked as failing, their parent Task succeeds.
+Even though there were 15 individual failures by its Processes, only
+1 of its Processes was finally marked as failing. Since 1 is less
+than the 2 that is the Task’s <code>max_failures</code> value, the Task does
+not fail.</p></li>
+<li><p><code>max_concurrency</code>: Defaulting to <code>0</code>, the maximum number of
+concurrent processes in the Task. <code>0</code> specifies unlimited
+concurrency. For Tasks with many expensive but otherwise independent
+processes, you can limit the amount of concurrency Thermos schedules
+instead of artificially constraining them through <code>order</code>
+constraints. For example, a test framework may generate a Task with
+100 test run processes, but runs it in a Task with
+<code>resources.cpus=4</code>. Limit the amount of parallelism to 4 by setting
+<code>max_concurrency=4</code>.</p></li>
+<li><p><code>finalization_wait</code>: Defaulting to <code>30</code>, the number of seconds
+allocated for finalizing the Task’s processes. A Task starts in
+<code>ACTIVE</code> state when Processes run and stays there as long as the Task
+is healthy and Processes run. When all Processes finish successfully
+or the Task reaches its maximum process failure limit, it goes into
+<code>CLEANING</code> state. In <code>CLEANING</code>, it sends <code>SIGTERMS</code> to any still running
+Processes. When all Processes terminate, the Task goes into
+<code>FINALIZING</code> state and invokes the schedule of all processes whose
+final attribute has a True value. Everything from the end of <code>ACTIVE</code>
+to the end of <code>FINALIZING</code> must happen within <code>finalization_wait</code>
+number of seconds. If not, all still running Processes are sent
+<code>SIGKILL</code>s (or if dependent on yet to be completed Processes, are
+never invoked).</p></li>
+</ul>
+
+<h3 id="sequentialtask:-running-processes-in-parallel-or-sequentially">SequentialTask: Running Processes in Parallel or Sequentially</h3>
+
+<p>By default, a Task with several Processes runs them in parallel. There
+are two ways to run Processes sequentially:</p>
+
+<ul>
+<li><p>Include an <code>order</code> constraint in the Task definition’s <code>constraints</code>
+attribute whose arguments specify the processes' run order:</p>
+<pre class="highlight text">Task( ... processes=[process1, process2, process3],
+ constraints = order(process1, process2, process3), ...)
+</pre></li>
+<li><p>Use <code>SequentialTask</code> instead of <code>Task</code>; it automatically runs
+processes in the order specified in the <code>processes</code> attribute. No
+<code>constraint</code> parameter is needed:</p>
+<pre class="highlight text">SequentialTask( ... processes=[process1, process2, process3] ...)
+</pre></li>
+</ul>
+
+<h3 id="simpletask">SimpleTask</h3>
+
+<p>For quickly creating simple tasks, use the <code>SimpleTask</code> helper. It
+creates a basic task from a provided name and command line using a
+default set of resources. For example, in a .<code>aurora</code> configuration
+file:</p>
+<pre class="highlight text">SimpleTask(name="hello_world", command="echo hello world")
+</pre>
+<p>is equivalent to</p>
+<pre class="highlight text">Task(name="hello_world",
+ processes=[Process(name = "hello_world", cmdline = "echo hello world")],
+ resources=Resources(cpu = 1.0,
+ ram = 1*GB,
+ disk = 1*GB))
+</pre>
+<p>The simplest idiomatic Job configuration thus becomes:</p>
+<pre class="highlight text">import os
+hello_world_job = Job(
+ task=SimpleTask(name="hello_world", command="echo hello world"),
+ role=os.getenv('USER'),
+ cluster="cluster1")
+</pre>
+<p>When written to <code>hello_world.aurora</code>, you invoke it with a simple
+<code>aurora create cluster1/$USER/test/hello_world hello_world.aurora</code>.</p>
+
+<h3 id="combining-tasks">Combining tasks</h3>
+
+<p><code>Tasks.concat</code>(synonym,<code>concat_tasks</code>) and
+<code>Tasks.combine</code>(synonym,<code>combine_tasks</code>) merge multiple Task definitions
+into a single Task. It may be easier to define complex Jobs
+as smaller constituent Tasks. But since a Job only includes a single
+Task, the subtasks must be combined before using them in a Job.
+Smaller Tasks can also be reused between Jobs, instead of having to
+repeat their definition for multiple Jobs.</p>
+
+<p>With both methods, the merged Task takes the first Task’s name. The
+difference between the two is the result Task’s process ordering.</p>
+
+<ul>
+<li><p><code>Tasks.combine</code> runs its subtasks' processes in no particular order.
+The new Task’s resource consumption is the sum of all its subtasks'
+consumption.</p></li>
+<li><p><code>Tasks.concat</code> runs its subtasks in the order supplied, with each
+subtask’s processes run serially between tasks. It is analogous to
+the <code>order</code> constraint helper, except at the Task level instead of
+the Process level. The new Task’s resource consumption is the
+maximum value specified by any subtask for each Resource attribute
+(cpu, ram and disk).</p></li>
+</ul>
+
+<p>For example, given the following:</p>
+<pre class="highlight text">setup_task = Task(
+ ...
+ processes=[download_interpreter, update_zookeeper],
+ # It is important to note that {{Tasks.concat}} has
+ # no effect on the ordering of the processes within a task;
+ # hence the necessity of the {{order}} statement below
+ # (otherwise, the order in which {{download_interpreter}}
+ # and {{update_zookeeper}} run will be non-deterministic)
+ constraints=order(download_interpreter, update_zookeeper),
+ ...
+)
+
+run_task = SequentialTask(
+ ...
+ processes=[download_application, start_application],
+ ...
+)
+
+combined_task = Tasks.concat(setup_task, run_task)
+</pre>
+<p>The <code>Tasks.concat</code> command merges the two Tasks into a single Task and
+ensures all processes in <code>setup_task</code> run before the processes
+in <code>run_task</code>. Conceptually, the task is reduced to:</p>
+<pre class="highlight text">task = Task(
+ ...
+ processes=[download_interpreter, update_zookeeper,
+ download_application, start_application],
+ constraints=order(download_interpreter, update_zookeeper,
+ download_application, start_application),
+ ...
+)
+</pre>
+<p>In the case of <code>Tasks.combine</code>, the two schedules run in parallel:</p>
+<pre class="highlight text">task = Task(
+ ...
+ processes=[download_interpreter, update_zookeeper,
+ download_application, start_application],
+ constraints=order(download_interpreter, update_zookeeper) +
+ order(download_application, start_application),
+ ...
+)
+</pre>
+<p>In the latter case, each of the two sequences may operate in parallel.
+Of course, this may not be the intended behavior (for example, if
+the <code>start_application</code> Process implicitly relies
+upon <code>download_interpreter</code>). Make sure you understand the difference
+between using one or the other.</p>
+
+<h2 id="defining-job-objects">Defining Job Objects</h2>
+
+<p>A job is a group of identical tasks that Aurora can run in a Mesos cluster.</p>
+
+<p>A <code>Job</code> object is defined by the values of several attributes, some
+required and some optional. The required attributes are:</p>
+
+<ul>
+<li><p><code>task</code>: Task object to bind to this job. Note that a Job can
+only take a single Task.</p></li>
+<li><p><code>role</code>: Job’s role account; in other words, the user account to run
+the job as on a Mesos cluster machine. A common value is
+<code>os.getenv('USER')</code>; using a Python command to get the user who
+submits the job request. The other common value is the service
+account that runs the job, e.g. <code>www-data</code>.</p></li>
+<li><p><code>environment</code>: Job’s environment, typical values
+are <code>devel</code>, <code>test</code>, or <code>prod</code>.</p></li>
+<li><p><code>cluster</code>: Aurora cluster to schedule the job in, defined in
+<code>/etc/aurora/clusters.json</code> or <code>~/.clusters.json</code>. You can specify
+jobs where the only difference is the <code>cluster</code>, then at run time
+only run the Job whose job key includes your desired cluster’s name.</p></li>
+</ul>
+
+<p>You usually see a <code>name</code> parameter. By default, <code>name</code> inherits its
+value from the Job’s associated Task object, but you can override this
+default. For these four parameters, a Job definition might look like:</p>
+<pre class="highlight text">foo_job = Job( name = 'foo', cluster = 'cluster1',
+ role = os.getenv('USER'), environment = 'prod',
+ task = foo_task)
+</pre>
+<p>In addition to the required attributes, there are several optional
+attributes. The first (strongly recommended) optional attribute is:</p>
+
+<ul>
+<li> <code>contact</code>: An email address for the Job’s owner. For production
+jobs, it is usually a team mailing list.</li>
+</ul>
+
+<p>Two more attributes deal with how to handle failure of the Job’s Task:</p>
+
+<ul>
+<li><p><code>max_task_failures</code>: An integer, defaulting to <code>1</code>, of the maximum
+number of Task failures after which the Job is considered failed.
+<code>-1</code> allows for infinite failures.</p></li>
+<li><p><code>service</code>: A boolean, defaulting to <code>False</code>, which if <code>True</code>
+restarts tasks regardless of whether they succeeded or failed. In
+other words, if <code>True</code>, after the Job’s Task completes, it
+automatically starts again. This is for Jobs you want to run
+continuously, rather than doing a single run.</p></li>
+</ul>
+
+<p>Three attributes deal with configuring the Job’s Task:</p>
+
+<ul>
+<li><p><code>instances</code>: Defaulting to <code>1</code>, the number of
+instances/replicas/shards of the Job’s Task to create.</p></li>
+<li><p><code>priority</code>: Defaulting to <code>0</code>, the Job’s Task’s preemption priority,
+for which higher values may preempt Tasks from Jobs with lower
+values.</p></li>
+<li><p><code>production</code>: a Boolean, defaulting to <code>False</code>, specifying that this
+is a production job backed by quota. Tasks from production Jobs may
+preempt tasks from any non-production job, and may only be preempted
+by tasks from production jobs in the same role with higher
+priority. <strong>WARNING</strong>: To run Jobs at this level, the Job role must
+have the appropriate quota.</p></li>
+</ul>
+
+<p>The final three Job attributes each take an object as their value.</p>
+
+<ul>
+<li> <code>update_config</code>: An <code>UpdateConfig</code>
+object provides parameters for controlling the rate and policy of
+rolling updates. The <code>UpdateConfig</code> parameters are:
+
+<ul>
+<li> <code>batch_size</code>: An integer, defaulting to <code>1</code>, specifying the
+maximum number of shards to update in one iteration.</li>
+<li> <code>restart_threshold</code>: An integer, defaulting to <code>60</code>, specifying
+the maximum number of seconds before a shard must move into the
+<code>RUNNING</code> state before considered a failure.</li>
+<li> <code>watch_secs</code>: An integer, defaulting to <code>45</code>, specifying the
+minimum number of seconds a shard must remain in the <code>RUNNING</code>
+state before considered a success.</li>
+<li> <code>max_per_shard_failures</code>: An integer, defaulting to <code>0</code>,
+specifying the maximum number of restarts per shard during an
+update. When the limit is exceeded, it increments the total
+failure count.</li>
+<li> <code>max_total_failures</code>: An integer, defaulting to <code>0</code>, specifying
+the maximum number of shard failures tolerated during an update.
+Cannot be equal to or greater than the job’s total number of
+tasks.</li>
+</ul></li>
+<li> <code>health_check_config</code>: A <code>HealthCheckConfig</code> object that provides
+parameters for controlling a Task’s health checks via HTTP. Only
+used if a health port was assigned with a command line wildcard. The
+<code>HealthCheckConfig</code> parameters are:
+
+<ul>
+<li> <code>initial_interval_secs</code>: An integer, defaulting to <code>15</code>,
+specifying the initial delay for doing an HTTP health check.</li>
+<li> <code>interval_secs</code>: An integer, defaulting to <code>10</code>, specifying the
+number of seconds in the interval between checking the Task’s
+health.</li>
+<li> <code>timeout_secs</code>: An integer, defaulting to <code>1</code>, specifying the
+number of seconds the application must respond to an HTTP health
+check with <code>OK</code> before it is considered a failure.</li>
+<li> <code>max_consecutive_failures</code>: An integer, defaulting to <code>0</code>,
+specifying the maximum number of consecutive failures before a
+task is unhealthy.</li>
+</ul></li>
+<li> <code>constraints</code>: A <code>dict</code> Python object, specifying Task scheduling
+constraints. Most users will not need to specify constraints, as the
+scheduler automatically inserts reasonable defaults. Please do not
+set this field unless you are sure of what you are doing. See the
+section in the Aurora + Thermos Reference manual on <a href="/documentation/latest/configuration-reference/">Specifying
+Scheduling Constraints</a> for more information.</li>
+</ul>
+
+<h2 id="the-jobs-list">The jobs List</h2>
+
+<p>At the end of your <code>.aurora</code> file, you need to specify a list of the
+file’s defined Jobs to run in the order listed. For example, the
+following runs first <code>job1</code>, then <code>job2</code>, then <code>job3</code>.</p>
+
+<p>jobs = [job1, job2, job3]</p>
+
+<h2 id="templating">Templating</h2>
+
+<p>The <code>.aurora</code> file format is just Python. However, <code>Job</code>, <code>Task</code>,
+<code>Process</code>, and other classes are defined by a templating library called
+<em>Pystachio</em>, a powerful tool for configuration specification and reuse.</p>
+
+<p><a href="/documentation/latest/configuration-reference/">Aurora+Thermos Configuration Reference</a>
+has a full reference of all Aurora/Thermos defined Pystachio objects.</p>
+
+<p>When writing your <code>.aurora</code> file, you may use any Pystachio datatypes, as
+well as any objects shown in the <em>Aurora+Thermos Configuration
+Reference</em> without <code>import</code> statements - the Aurora config loader
+injects them automatically. Other than that the <code>.aurora</code> format
+works like any other Python script.</p>
+
+<h3 id="templating-1:-binding-in-pystachio">Templating 1: Binding in Pystachio</h3>
+
+<p>Pystachio uses the visually distinctive {{}} to indicate template
+variables. These are often called “mustache variables” after the
+similarly appearing variables in the Mustache templating system and
+because the curly braces resemble mustaches.</p>
+
+<p>If you are familiar with the Mustache system, templates in Pystachio
+have significant differences. They have no nesting, joining, or
+inheritance semantics. On the other hand, when evaluated, templates
+are evaluated iteratively, so this affords some level of indirection.</p>
+
+<p>Let’s start with the simplest template; text with one
+variable, in this case <code>name</code>;</p>
+<pre class="highlight text">Hello {{name}}
+</pre>
+<p>If we evaluate this as is, we’d get back:</p>
+<pre class="highlight text">Hello
+</pre>
+<p>If a template variable doesn’t have a value, when evaluated it’s
+replaced with nothing. If we add a binding to give it a value:</p>
+<pre class="highlight json"><span class="p">{</span><span class="w"> </span><span class="s2">"name"</span><span class="w"> </span><span class="p">:</span><span class="w"> </span><span class="s2">"Tom"</span><span class="w"> </span><span class="p">}</span><span class="w">
+</span></pre>
+<p>We’d get back:</p>
+<pre class="highlight text">Hello Tom
+</pre>
+<p>We can also use {{}} variables as sectional variables. Let’s say we
+have:</p>
+<pre class="highlight text">{{#x}} Testing... {{/x}}
+</pre>
+<p>If <code>x</code> evaluates to <code>True</code>, the text between the sectional tags is
+shown. If there is no value for <code>x</code> or it evaluates to <code>False</code>, the
+between tags text is not shown. So, at a basic level, a sectional
+variable acts as a conditional.</p>
+
+<p>However, if the sectional variable evaluates to a list, array, etc. it
+acts as a <code>foreach</code>. For example,</p>
+<pre class="highlight text">{{#x}} {{name}} {{/x}}
+</pre>
+<p>with</p>
+<pre class="highlight json"><span class="p">{</span><span class="w"> </span><span class="s2">"x"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="s2">"name"</span><span class="w"> </span><span class="p">:</span><span class="w"> </span><span class="s2">"tic"</span><span class="w"> </span><span class="p">}</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="s2">"name"</span><span class="w"> </span><span class="p">:</span><span class="w"> </span><span class="s2">"tac"</span><span class="w"> </span><span class="p">}</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="s2">"name"</span><span class="w"> </span><span class="p">:</span><span class="w"> </span><span class="s2">"toe"</span><span class="w"> </span><span class="p">}</span
><span class="w"> </span><span class="p">]</span><span class="w"> </span><span class="p">}</span><span class="w">
+</span></pre>
+<p>evaluates to</p>
+<pre class="highlight text">tic tac toe
+</pre>
+<p>Every Pystachio object has an associated <code>.bind</code> method that can bind
+values to {{}} variables. Bindings are not immediately evaluated.
+Instead, they are evaluated only when the interpolated value of the
+object is necessary, e.g. for performing equality or serializing a
+message over the wire.</p>
+
+<p>Objects with and without mustache templated variables behave
+differently:</p>
+<pre class="highlight text">>>> Float(1.5)
+Float(1.5)
+
+>>> Float('{{x}}.5')
+Float({{x}}.5)
+
+>>> Float('{{x}}.5').bind(x = 1)
+Float(1.5)
+
+>>> Float('{{x}}.5').bind(x = 1) == Float(1.5)
+True
+
+>>> contextual_object = String('{{metavar{{number}}}}').bind(
+... metavar1 = "first", metavar2 = "second")
+
+>>> contextual_object
+String({{metavar{{number}}}})
+
+>>> contextual_object.bind(number = 1)
+String(first)
+
+>>> contextual_object.bind(number = 2)
+String(second)
+</pre>
+<p>You usually bind simple key to value pairs, but you can also bind three
+other objects: lists, dictionaries, and structurals. These will be
+described in detail later.</p>
+
+<h3 id="structurals-in-pystachio-/-aurora">Structurals in Pystachio / Aurora</h3>
+
+<p>Most Aurora/Thermos users don’t ever (knowingly) interact with <code>String</code>,
+<code>Float</code>, or <code>Integer</code> Pystashio objects directly. Instead they interact
+with derived structural (<code>Struct</code>) objects that are collections of
+fundamental and structural objects. The structural object components are
+called <em>attributes</em>. Aurora’s most used structural objects are <code>Job</code>,
+<code>Task</code>, and <code>Process</code>:</p>
+<pre class="highlight text">class Process(Struct):
+ cmdline = Required(String)
+ name = Required(String)
+ max_failures = Default(Integer, 1)
+ daemon = Default(Boolean, False)
+ ephemeral = Default(Boolean, False)
+ min_duration = Default(Integer, 5)
+ final = Default(Boolean, False)
+</pre>
+<p>Construct default objects by following the object’s type with (). If you
+want an attribute to have a value different from its default, include
+the attribute name and value inside the parentheses.</p>
+<pre class="highlight text">>>> Process()
+Process(daemon=False, max_failures=1, ephemeral=False,
+ min_duration=5, final=False)
+</pre>
+<p>Attribute values can be template variables, which then receive specific
+values when creating the object.</p>
+<pre class="highlight text">>>> Process(cmdline = 'echo {{message}}')
+Process(daemon=False, max_failures=1, ephemeral=False, min_duration=5,
+ cmdline=echo {{message}}, final=False)
+
+>>> Process(cmdline = 'echo {{message}}').bind(message = 'hello world')
+Process(daemon=False, max_failures=1, ephemeral=False, min_duration=5,
+ cmdline=echo hello world, final=False)
+</pre>
+<p>A powerful binding property is that all of an object’s children inherit its
+bindings:</p>
+<pre class="highlight text">>>> List(Process)([
+... Process(name = '{{prefix}}_one'),
+... Process(name = '{{prefix}}_two')
+... ]).bind(prefix = 'hello')
+ProcessList(
+ Process(daemon=False, name=hello_one, max_failures=1, ephemeral=False, min_duration=5, final=False),
+ Process(daemon=False, name=hello_two, max_failures=1, ephemeral=False, min_duration=5, final=False)
+ )
+</pre>
+<p>Remember that an Aurora Job contains Tasks which contain Processes. A
+Job level binding is inherited by its Tasks and all their Processes.
+Similarly a Task level binding is available to that Task and its
+Processes but is <em>not</em> visible at the Job level (inheritance is a
+one-way street.)</p>
+
+<h4 id="mustaches-within-structurals">Mustaches Within Structurals</h4>
+
+<p>When you define a <code>Struct</code> schema, one powerful, but confusing, feature
+is that all of that structure’s attributes are Mustache variables within
+the enclosing scope <em>once they have been populated</em>.</p>
+
+<p>For example, when <code>Process</code> is defined above, all its attributes such as
+{{<code>name</code>}}, {{<code>cmdline</code>}}, {{<code>max_failures</code>}} etc., are all immediately
+defined as Mustache variables, implicitly bound into the <code>Process</code>, and
+inherit all child objects once they are defined.</p>
+
+<p>Thus, you can do the following:</p>
+<pre class="highlight text">>>> Process(name = "installer", cmdline = "echo {{name}} is running")
+Process(daemon=False, name=installer, max_failures=1, ephemeral=False, min_duration=5,
+ cmdline=echo installer is running, final=False)
+</pre>
+<p>WARNING: This binding only takes place in one direction. For example,
+the following does NOT work and does not set the <code>Process</code> <code>name</code>
+attribute’s value.</p>
+<pre class="highlight text">>>> Process().bind(name = "installer")
+Process(daemon=False, max_failures=1, ephemeral=False, min_duration=5, final=False)
+</pre>
+<p>The following is also not possible and results in an infinite loop that
+attempts to resolve <code>Process.name</code>.</p>
+<pre class="highlight text">>>> Process(name = '{{name}}').bind(name = 'installer')
+</pre>
+<p>Do not confuse Structural attributes with bound Mustache variables.
+Attributes are implicitly converted to Mustache variables but not vice
+versa.</p>
+
+<h3 id="templating-2:-structurals-are-factories">Templating 2: Structurals Are Factories</h3>
+
+<h4 id="a-second-way-of-templating">A Second Way of Templating</h4>
+
+<p>A second templating method is both as powerful as the aforementioned and
+often confused with it. This method is due to automatic conversion of
+Struct attributes to Mustache variables as described above.</p>
+
+<p>Suppose you create a Process object:</p>
+<pre class="highlight text">>>> p = Process(name = "process_one", cmdline = "echo hello world")
+
+>>> p
+Process(daemon=False, name=process_one, max_failures=1, ephemeral=False, min_duration=5,
+ cmdline=echo hello world, final=False)
+</pre>
+<p>This <code>Process</code> object, “<code>p</code>”, can be used wherever a <code>Process</code> object is
+needed. It can also be reused by changing the value(s) of its
+attribute(s). Here we change its <code>name</code> attribute from <code>process_one</code> to
+<code>process_two</code>.</p>
+<pre class="highlight text">>>> p(name = "process_two")
+Process(daemon=False, name=process_two, max_failures=1, ephemeral=False, min_duration=5,
+ cmdline=echo hello world, final=False)
+</pre>
+<p>Template creation is a common use for this technique:</p>
+<pre class="highlight text">>>> Daemon = Process(daemon = True)
+>>> logrotate = Daemon(name = 'logrotate', cmdline = './logrotate conf/logrotate.conf')
+>>> mysql = Daemon(name = 'mysql', cmdline = 'bin/mysqld --safe-mode')
+</pre>
+<h3 id="advanced-binding">Advanced Binding</h3>
+
+<p>As described above, <code>.bind()</code> binds simple strings or numbers to
+Mustache variables. In addition to Structural types formed by combining
+atomic types, Pystachio has two container types; <code>List</code> and <code>Map</code> which
+can also be bound via <code>.bind()</code>.</p>
+
+<h4 id="bind-syntax">Bind Syntax</h4>
+
+<p>The <code>bind()</code> function can take Python dictionaries or <code>kwargs</code>
+interchangeably (when “<code>kwargs</code>” is in a function definition, <code>kwargs</code>
+receives a Python dictionary containing all keyword arguments after the
+formal parameter list).</p>
+<pre class="highlight text">>>> String('{{foo}}').bind(foo = 'bar') == String('{{foo}}').bind({'foo': 'bar'})
+True
+</pre>
+<p>Bindings done “closer” to the object in question take precedence:</p>
+<pre class="highlight text">>>> p = Process(name = '{{context}}_process')
+>>> t = Task().bind(context = 'global')
+>>> t(processes = [p, p.bind(context = 'local')])
+Task(processes=ProcessList(
+ Process(daemon=False, name=global_process, max_failures=1, ephemeral=False, final=False,
+ min_duration=5),
+ Process(daemon=False, name=local_process, max_failures=1, ephemeral=False, final=False,
+ min_duration=5)
+))
+</pre>
+<h4 id="binding-complex-objects">Binding Complex Objects</h4>
+
+<h5 id="lists">Lists</h5>
+<pre class="highlight text">>>> fibonacci = List(Integer)([1, 1, 2, 3, 5, 8, 13])
+>>> String('{{fib[4]}}').bind(fib = fibonacci)
+String(5)
+</pre>
+<h5 id="maps">Maps</h5>
+<pre class="highlight text">>>> first_names = Map(String, String)({'Kent': 'Clark', 'Wayne': 'Bruce', 'Prince': 'Diana'})
+>>> String('{{first[Kent]}}').bind(first = first_names)
+String(Clark)
+</pre>
+<h5 id="structurals">Structurals</h5>
+<pre class="highlight text">>>> String('{{p.cmdline}}').bind(p = Process(cmdline = "echo hello world"))
+String(echo hello world)
+</pre>
+<h3 id="structural-binding">Structural Binding</h3>
+
+<p>Use structural templates when binding more than two or three individual
+values at the Job or Task level. For fewer than two or three, standard
+key to string binding is sufficient.</p>
+
+<p>Structural binding is a very powerful pattern and is most useful in
+Aurora/Thermos for doing Structural configuration. For example, you can
+define a job profile. The following profile uses <code>HDFS</code>, the Hadoop
+Distributed File System, to designate a file’s location. <code>HDFS</code> does
+not come with Aurora, so you’ll need to either install it separately
+or change the way the dataset is designated.</p>
+<pre class="highlight text">class Profile(Struct):
+ version = Required(String)
+ environment = Required(String)
+ dataset = Default(String, hdfs://home/aurora/data/{{environment}}')
+
+PRODUCTION = Profile(version = 'live', environment = 'prod')
+DEVEL = Profile(version = 'latest',
+ environment = 'devel',
+ dataset = 'hdfs://home/aurora/data/test')
+TEST = Profile(version = 'latest', environment = 'test')
+
+JOB_TEMPLATE = Job(
+ name = 'application',
+ role = 'myteam',
+ cluster = 'cluster1',
+ environment = '{{profile.environment}}',
+ task = SequentialTask(
+ name = 'task',
+ resources = Resources(cpu = 2, ram = 4*GB, disk = 8*GB),
+ processes = [
+ Process(name = 'main', cmdline = 'java -jar application.jar -hdfsPath
+ {{profile.dataset}}')
+ ]
+ )
+ )
+
+jobs = [
+ JOB_TEMPLATE(instances = 100).bind(profile = PRODUCTION),
+ JOB_TEMPLATE.bind(profile = DEVEL),
+ JOB_TEMPLATE.bind(profile = TEST),
+ ]
+</pre>
+<p>In this case, a custom structural “Profile” is created to self-document
+the configuration to some degree. This also allows some schema
+“type-checking”, and for default self-substitution, e.g. in
+<code>Profile.dataset</code> above.</p>
+
+<p>So rather than a <code>.bind()</code> with a half-dozen substituted variables, you
+can bind a single object that has sensible defaults stored in a single
+place.</p>
+
+<h2 id="configuration-file-writing-tips-and-best-practices">Configuration File Writing Tips And Best Practices</h2>
+
+<h3 id="use-as-few-.aurora-files-as-possible">Use As Few .aurora Files As Possible</h3>
+
+<p>When creating your <code>.aurora</code> configuration, try to keep all versions of
+a particular job within the same <code>.aurora</code> file. For example, if you
+have separate jobs for <code>cluster1</code>, <code>cluster1</code> staging, <code>cluster1</code>
+testing, and<code>cluster2</code>, keep them as close together as possible.</p>
+
+<p>Constructs shared across multiple jobs owned by your team (e.g.
+team-level defaults or structural templates) can be split into separate
+<code>.aurora</code>files and included via the <code>include</code> directive.</p>
+
+<h3 id="avoid-boilerplate">Avoid Boilerplate</h3>
+
+<p>If you see repetition or find yourself copy and pasting any parts of
+your configuration, it’s likely an opportunity for templating. Take the
+example below:</p>
+
+<p><code>redundant.aurora</code> contains:</p>
+<pre class="highlight text">download = Process(
+ name = 'download',
+ cmdline = 'wget http://www.python.org/ftp/python/2.7.3/Python-2.7.3.tar.bz2',
+ max_failures = 5,
+ min_duration = 1)
+
+unpack = Process(
+ name = 'unpack',
+ cmdline = 'rm -rf Python-2.7.3 && tar xzf Python-2.7.3.tar.bz2',
+ max_failures = 5,
+ min_duration = 1)
+
+build = Process(
+ name = 'build',
+ cmdline = 'pushd Python-2.7.3 && ./configure && make && popd',
+ max_failures = 1)
+
+email = Process(
+ name = 'email',
+ cmdline = 'echo Success | mail feynman@tmc.com',
+ max_failures = 5,
+ min_duration = 1)
+
+build_python = Task(
+ name = 'build_python',
+ processes = [download, unpack, build, email],
+ constraints = [Constraint(order = ['download', 'unpack', 'build', 'email'])])
+</pre>
+<p>As you’ll notice, there’s a lot of repetition in the <code>Process</code>
+definitions. For example, almost every process sets a <code>max_failures</code>
+limit to 5 and a <code>min_duration</code> to 1. This is an opportunity for factoring
+into a common process template.</p>
+
+<p>Furthermore, the Python version is repeated everywhere. This can be
+bound via structural templating as described in the <a href="#AdvancedBinding">Advanced Binding</a>
+section.</p>
+
+<p><code>less_redundant.aurora</code> contains:</p>
+<pre class="highlight text">class Python(Struct):
+ version = Required(String)
+ base = Default(String, 'Python-{{version}}')
+ package = Default(String, '{{base}}.tar.bz2')
+
+ReliableProcess = Process(
+ max_failures = 5,
+ min_duration = 1)
+
+download = ReliableProcess(
+ name = 'download',
+ cmdline = 'wget http://www.python.org/ftp/python/{{python.version}}/{{python.package}}')
+
+unpack = ReliableProcess(
+ name = 'unpack',
+ cmdline = 'rm -rf {{python.base}} && tar xzf {{python.package}}')
+
+build = ReliableProcess(
+ name = 'build',
+ cmdline = 'pushd {{python.base}} && ./configure && make && popd',
+ max_failures = 1)
+
+email = ReliableProcess(
+ name = 'email',
+ cmdline = 'echo Success | mail {{role}}@foocorp.com')
+
+build_python = SequentialTask(
+ name = 'build_python',
+ processes = [download, unpack, build, email]).bind(python = Python(version = "2.7.3"))
+</pre>
+<h3 id="thermos-uses-bash,-but-thermos-is-not-bash">Thermos Uses bash, But Thermos Is Not bash</h3>
+
+<h4 id="bad">Bad</h4>
+
+<p>Many tiny Processes makes for harder to manage configurations.</p>
+<pre class="highlight text">copy = Process(
+ name = 'copy',
+ cmdline = 'rcp user@my_machine:my_application .'
+ )
+
+ unpack = Process(
+ name = 'unpack',
+ cmdline = 'unzip app.zip'
+ )
+
+ remove = Process(
+ name = 'remove',
+ cmdline = 'rm -f app.zip'
+ )
+
+ run = Process(
+ name = 'app',
+ cmdline = 'java -jar app.jar'
+ )
+
+ run_task = Task(
+ processes = [copy, unpack, remove, run],
+ constraints = order(copy, unpack, remove, run)
+ )
+</pre>
+<h4 id="good">Good</h4>
+
+<p>Each <code>cmdline</code> runs in a bash subshell, so you have the full power of
+bash. Chaining commands with <code>&&</code> or <code>||</code> is almost always the right
+thing to do.</p>
+
+<p>Also for Tasks that are simply a list of processes that run one after
+another, consider using the <code>SequentialTask</code> helper which applies a
+linear ordering constraint for you.</p>
+<pre class="highlight text">stage = Process(
+ name = 'stage',
+ cmdline = 'rcp user@my_machine:my_application . && unzip app.zip && rm -f app.zip')
+
+run = Process(name = 'app', cmdline = 'java -jar app.jar')
+
+run_task = SequentialTask(processes = [stage, run])
+</pre>
+<h3 id="rarely-use-functions-in-your-configurations">Rarely Use Functions In Your Configurations</h3>
+
+<p>90% of the time you define a function in a <code>.aurora</code> file, you’re
+probably Doing It Wrong™.</p>
+
+<h4 id="bad">Bad</h4>
+<pre class="highlight text">def get_my_task(name, user, cpu, ram, disk):
+ return Task(
+ name = name,
+ user = user,
+ processes = [STAGE_PROCESS, RUN_PROCESS],
+ constraints = order(STAGE_PROCESS, RUN_PROCESS),
+ resources = Resources(cpu = cpu, ram = ram, disk = disk)
+ )
+
+ task_one = get_my_task('task_one', 'feynman', 1.0, 32*MB, 1*GB)
+ task_two = get_my_task('task_two', 'feynman', 2.0, 64*MB, 1*GB)
+</pre>
+<h4 id="good">Good</h4>
+
+<p>This one is more idiomatic. Forced keyword arguments prevents accidents,
+e.g. constructing a task with “32*MB” when you mean 32MB of ram and not
+disk. Less proliferation of task-construction techniques means
+easier-to-read, quicker-to-understand, and a more composable
+configuration.</p>
+<pre class="highlight text">TASK_TEMPLATE = SequentialTask(
+ user = 'wickman',
+ processes = [STAGE_PROCESS, RUN_PROCESS],
+)
+
+task_one = TASK_TEMPLATE(
+ name = 'task_one',
+ resources = Resources(cpu = 1.0, ram = 32*MB, disk = 1*GB) )
+
+task_two = TASK_TEMPLATE(
+ name = 'task_two',
+ resources = Resources(cpu = 2.0, ram = 64*MB, disk = 1*GB)
+)
+</pre>
+ </div>
+ </div>
+
+ <div class="container-fluid section-footer buffer">
+ <div class="container">
+ <div class="row">
+ <div class="col-md-2 col-md-offset-1"><h3>Quick Links</h3>
+ <ul>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/community/">Mailing Lists</a></li>
+ <li><a href="http://issues.apache.org/jira/browse/AURORA">Issue Tracking</a></li>
+ <li><a href="/documentation/latest/contributing/">How To Contribute</a></li>
+ </ul>
+ </div>
+ <div class="col-md-2"><h3>The ASF</h3>
+ <ul>
+ <li><a href="http://www.apache.org/licenses/">License</a></li>
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+ <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
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+ <div class="col-md-6">
+ <p class="disclaimer">Apache Aurora is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.</p>
+ <p class="disclaimer">Copyright 2014 <a href="http://www.apache.org/">Apache Software Foundation</a>. Licensed under the <a href="http://www.apache.org/licenses/">Apache License v2.0</a>. The <a href="https://www.flickr.com/photos/trondk/12706051375/">Aurora Borealis IX photo</a> displayed on the homepage is available under a <a href="https://creativecommons.org/licenses/by-nc-nd/2.0/">Creative Commons BY-NC-ND 2.0 license</a>. Apache, Apache Aurora, and the Apache feather logo are trademarks of The Apache Software Foundation.</p>
+ </div>
+ </div>
+ </div>
+ </body>
+</html>
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+<!DOCTYPE html>
+<html lang="en">
+ <head>
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+ <meta name="viewport" content="width=device-width, initial-scale=1">
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+ <ul class="nav navbar-nav navbar-right">
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+ <h2 id="get-the-source-code">Get the Source Code</h2>
+
+<p>First things first, you’ll need the source! The Aurora source is available from Apache git:</p>
+<pre class="highlight text">git clone https://git-wip-us.apache.org/repos/asf/incubator-aurora
+</pre>
+<h2 id="find-something-to-do">Find Something to Do</h2>
+
+<p>There are issues in <a href="https://issues.apache.org/jira/browse/AURORA">Jira</a> with the
+<a href="https://issues.apache.org/jira/browse/AURORA-189?jql=project%20%3D%20AURORA%20AND%20resolution%20%3D%20Unresolved%20AND%20labels%20%3D%20newbie%20ORDER%20BY%20priority%20DESC">“newbie” tag</a>
+that are good starting places for new Aurora contributors; pick one of these and dive in! Once
+you’ve got a patch, the next step is to post a review.</p>
+
+<h2 id="getting-your-reviewboard-account">Getting your ReviewBoard Account</h2>
+
+<p>Go to <a href="https://reviews.apache.org">https://reviews.apache.org</a> and create an account.</p>
+
+<h2 id="setting-up-your-reviewboard-environment">Setting up your ReviewBoard Environment</h2>
+
+<p>Run <code>./rbt status</code>. The first time this runs it will bootstrap and you will be asked to login.
+Subsequent runs will cache your login credentials.</p>
+
+<h2 id="submitting-a-patch-for-review">Submitting a Patch for Review</h2>
+
+<p>Post a review with <code>rbt</code>, fill out the fields in your browser and hit Publish.</p>
+<pre class="highlight text">./rbt post -o
+</pre>
+<p>Once you’ve done this, you probably want to mark the associated Jira issue as Reviewable.</p>
+
+<h2 id="updating-an-existing-review">Updating an Existing Review</h2>
+
+<p>Incorporate review feedback, make some more commits, update your existing review, fill out the
+fields in your browser and hit Publish.</p>
+<pre class="highlight text">./rbt post -o -r <RB_ID>
+</pre>
+<h2 id="merging-your-own-review-(committers)">Merging Your Own Review (Committers)</h2>
+
+<p>Once you have shipits from the right committers, merge your changes in a single commit and mark
+the review as submitted. The typical workflow is:</p>
+<pre class="highlight text">git checkout master
+git pull origin master
+./rbt patch -c <RB_ID> # Verify the automatically-generated commit message looks sane,
+ # editing if necessary.
+git show master # Verify everything looks sane
+git push origin master
+./rbt close <RB_ID>
+</pre>
+<p>Note that even if you’re developing using feature branches you will not use <code>git merge</code> - each
+commit will be an atomic change accompanied by a ReviewBoard entry.</p>
+
+<h2 id="merging-someone-else's-review">Merging Someone Else’s Review</h2>
+
+<p>Sometimes you’ll need to merge someone else’s RB. The typical workflow for this is</p>
+<pre class="highlight text">git checkout master
+git pull origin master
+./rbt patch -c <RB_ID>
+git show master # Verify everything looks sane, author is correct
+git push origin master
+</pre>
+<h2 id="cleaning-up">Cleaning Up</h2>
+
+<p>Your patch has landed, congratulations! The last thing you’ll want to do before moving on to your
+next fix is to clean up your Jira and Reviewboard. The former of which should be marked as
+“Resolved” while the latter should be marked as “Submitted”.</p>
+
+ </div>
+ </div>
+
+ <div class="container-fluid section-footer buffer">
+ <div class="container">
+ <div class="row">
+ <div class="col-md-2 col-md-offset-1"><h3>Quick Links</h3>
+ <ul>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/community/">Mailing Lists</a></li>
+ <li><a href="http://issues.apache.org/jira/browse/AURORA">Issue Tracking</a></li>
+ <li><a href="/documentation/latest/contributing/">How To Contribute</a></li>
+ </ul>
+ </div>
+ <div class="col-md-2"><h3>The ASF</h3>
+ <ul>
+ <li><a href="http://www.apache.org/licenses/">License</a></li>
+ <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+ <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
+ <li><a href="http://www.apache.org/security/">Security</a></li>
+ </ul>
+ </div>
+ <div class="col-md-6">
+ <p class="disclaimer">Apache Aurora is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.</p>
+ <p class="disclaimer">Copyright 2014 <a href="http://www.apache.org/">Apache Software Foundation</a>. Licensed under the <a href="http://www.apache.org/licenses/">Apache License v2.0</a>. The <a href="https://www.flickr.com/photos/trondk/12706051375/">Aurora Borealis IX photo</a> displayed on the homepage is available under a <a href="https://creativecommons.org/licenses/by-nc-nd/2.0/">Creative Commons BY-NC-ND 2.0 license</a>. Apache, Apache Aurora, and the Apache feather logo are trademarks of The Apache Software Foundation.</p>
+ </div>
+ </div>
+ </div>
+ </body>
+</html>
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/publish/documentation/latest/cron-jobs/index.html
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+<!DOCTYPE html>
+<html lang="en">
+ <head>
+ <meta charset="utf-8">
+ <meta name="viewport" content="width=device-width, initial-scale=1">
+ <title>Apache Aurora</title>
+ <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css">
+ <link href="/assets/css/main.css" rel="stylesheet">
+ <!-- Analytics -->
+ <script type="text/javascript">
+ var _gaq = _gaq || [];
+ _gaq.push(['_setAccount', 'UA-45879646-1']);
+ _gaq.push(['_setDomainName', 'apache.org']);
+ _gaq.push(['_trackPageview']);
+
+ (function() {
+ var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
+ ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
+ var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
+ })();
+ </script>
+ </head>
+ <body>
+
+ <div class="container-fluid section-header">
+ <div class="container">
+ <div class="nav nav-bar">
+ <a href="/"><img src="/assets/img/aurora_logo_white_bkg.svg" width="300" alt="Transparent Apache Aurora logo with dark background"/></a>
+ <ul class="nav navbar-nav navbar-right">
+ <li><a href="/documentation/latest/">Documentation</a></li>
+ <li><a href="/community/">Community</a></li>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/blog/">Blog</a></li>
+ </ul>
+ </div>
+ </div>
+</div>
+ <div class="container-fluid">
+ <div class="container content">
+ <h1 id="cron-jobs">Cron Jobs</h1>
+
+<p>Aurora supports execution of scheduled jobs on a Mesos cluster using cron-style syntax.</p>
+
+<ul>
+<li><a href="#overview">Overview</a></li>
+<li><a href="#collision-policies">Collision Policies</a>
+
+<ul>
+<li><a href="#kill_existing">KILL_EXISTING</a></li>
+<li><a href="#cancel_new">CANCEL_NEW</a></li>
+</ul></li>
+<li><a href="#failure-recovery">Failure recovery</a></li>
+<li><a href="#interacting-with-cron-jobs-via-the-aurora-cli">Interacting with cron jobs via the Aurora CLI</a>
+
+<ul>
+<li><a href="#cron-schedule">cron schedule</a></li>
+<li><a href="#cron-deschedule">cron deschedule</a></li>
+<li><a href="#cron-start">cron start</a></li>
+<li><a href="#job-killall-job-restart-job-kill">job killall, job restart, job kill</a></li>
+</ul></li>
+<li><a href="#technical-note-about-syntax">Technical Note About Syntax</a></li>
+<li><a href="#caveats">Caveats</a>
+
+<ul>
+<li><a href="#failovers">Failovers</a></li>
+<li><a href="#collision-policy-is-best-effort">Collision policy is best-effort</a></li>
+<li><a href="#timezone-configuration">Timezone Configuration</a></li>
+</ul></li>
+</ul>
+
+<h2 id="overview">Overview</h2>
+
+<p>A job is identified as a cron job by the presence of a
+<code>cron_schedule</code> attribute containing a cron-style schedule in the
+<a href="configuration-reference.md#job-objects"><code>Job</code></a> object. Examples of cron schedules
+include “every 5 minutes” (<code>*/5 * * * *</code>), “Fridays at 17:00” (<code>* 17 * * FRI</code>), and
+“the 1st and 15th day of the month at 03:00” (<code>0 3 1,15 *</code>).</p>
+
+<p>Example (available in the <a href="/documentation/latest/vagrant/">Vagrant environment</a>):</p>
+<pre class="highlight text">$ cat /vagrant/examples/job/cron_hello_world.aurora
+# cron_hello_world.aurora
+# A cron job that runs every 5 minutes.
+jobs = [
+ Job(
+ cluster = 'devcluster',
+ role = 'www-data',
+ environment = 'test',
+ name = 'cron_hello_world',
+ cron_schedule = '*/5 * * * *',
+ task = SimpleTask(
+ 'cron_hello_world',
+ 'echo "Hello world from cron, the time is now $(date --rfc-822)"'),
+ ),
+]
+</pre>
+<h2 id="collision-policies">Collision Policies</h2>
+
+<p>The <code>cron_collision_policy</code> field specifies the scheduler’s behavior when a new cron job is
+triggered while an older run hasn’t finished. The scheduler has two policies available,
+<a href="#kill_existing">KILL_EXISTING</a> and <a href="#cancel_new">CANCEL_NEW</a>.</p>
+
+<h3 id="kill_existing">KILL_EXISTING</h3>
+
+<p>The default policy - on a collision the old instances are killed and a instances with the current
+configuration are started.</p>
+
+<h3 id="cancel_new">CANCEL_NEW</h3>
+
+<p>On a collision the new run is cancelled.</p>
+
+<p>Note that the use of this flag is likely a code smell - interrupted cron jobs should be able
+to recover their progress on a subsequent invocation, otherwise they risk having their work queue
+grow faster than they can process it.</p>
+
+<h2 id="failure-recovery">Failure recovery</h2>
+
+<p>Unlike with services, which aurora will always re-execute regardless of exit status, instances of
+cron jobs retry according to the <code>max_task_failures</code> attribute of the
+<a href="configuration-reference.md#task-objects">Task</a> object. To get “run-until-failure” semantics,
+set <code>max_task_failures</code> to <code>-1</code>.</p>
+
+<h2 id="interacting-with-cron-jobs-via-the-aurora-cli">Interacting with cron jobs via the Aurora CLI</h2>
+
+<p>Most interaction with cron jobs takes place using the <code>cron</code> subcommand. See <code>aurora2 help cron</code>
+for up-to-date usage instructions.</p>
+
+<h3 id="cron-schedule">cron schedule</h3>
+
+<p>Schedules a new cron job on the Aurora cluster for later runs or replaces the existing cron template
+with a new one. Only future runs will be affected, any existing active tasks are left intact.</p>
+<pre class="highlight text">$ aurora2 cron schedule devcluster/www-data/test/cron_hello_world /vagrant/examples/jobs/cron_hello_world.aurora
+</pre>
+<h3 id="cron-deschedule">cron deschedule</h3>
+
+<p>Deschedules a cron job, preventing future runs but allowing current runs to complete.</p>
+<pre class="highlight text">$ aurora2 cron deschedule devcluster/www-data/test/cron_hello_world
+</pre>
+<h3 id="cron-start">cron start</h3>
+
+<p>Start a cron job immediately, outside of its normal cron schedule.</p>
+<pre class="highlight text">$ aurora2 cron start devcluster/www-data/test/cron_hello_world
+</pre>
+<h3 id="job-killall,-job-restart,-job-kill">job killall, job restart, job kill</h3>
+
+<p>Cron jobs create instances running on the cluster that you can interact with like normal Aurora
+tasks with <code>job kill</code> and <code>job restart</code>.</p>
+
+<h2 id="technical-note-about-syntax">Technical Note About Syntax</h2>
+
+<p><code>cron_schedule</code> uses a restricted subset of BSD crontab syntax. While the
+execution engine currently uses Quartz, the schedule parsing is custom, a subset of FreeBSD
+<a href="http://www.freebsd.org/cgi/man.cgi?crontab(5)">crontab(5)</a> syntax. See
+<a href="https://github.com/apache/incubator-aurora/blob/master/src/main/java/org/apache/aurora/scheduler/cron/CrontabEntry.java#L106-L124">the source</a>
+for details.</p>
+
+<h2 id="caveats">Caveats</h2>
+
+<h3 id="failovers">Failovers</h3>
+
+<p>No failover recovery. Aurora does not record the latest minute it fired
+triggers for across failovers. Therefore it’s possible to miss triggers
+on failover. Note that this behavior may change in the future.</p>
+
+<p>It’s necessary to sync time between schedulers with something like <code>ntpd</code>.
+Clock skew could cause double or missed triggers in the case of a failover.</p>
+
+<h3 id="collision-policy-is-best-effort">Collision policy is best-effort</h3>
+
+<p>Aurora aims to always have <em>at least one copy</em> of a given instance running at a time - it’s
+an AP system, meaning it chooses Availability and Partition Tolerance at the expense of
+Consistency.</p>
+
+<p>If your collision policy was <code>CANCEL_NEW</code> and a task has terminated but
+Aurora has not noticed this Aurora will go ahead and create your new
+task.</p>
+
+<p>If your collision policy was <code>KILL_EXISTING</code> and a task was marked <code>LOST</code>
+but not yet GCed Aurora will go ahead and create your new task without
+attempting to kill the old one (outside the GC interval).</p>
+
+<h3 id="timezone-configuration">Timezone Configuration</h3>
+
+<p>Cron timezone is configured indepdendently of JVM timezone with the <code>-cron_timezone</code> flag and
+defaults to UTC.</p>
+
+ </div>
+ </div>
+
+ <div class="container-fluid section-footer buffer">
+ <div class="container">
+ <div class="row">
+ <div class="col-md-2 col-md-offset-1"><h3>Quick Links</h3>
+ <ul>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/community/">Mailing Lists</a></li>
+ <li><a href="http://issues.apache.org/jira/browse/AURORA">Issue Tracking</a></li>
+ <li><a href="/documentation/latest/contributing/">How To Contribute</a></li>
+ </ul>
+ </div>
+ <div class="col-md-2"><h3>The ASF</h3>
+ <ul>
+ <li><a href="http://www.apache.org/licenses/">License</a></li>
+ <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+ <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
+ <li><a href="http://www.apache.org/security/">Security</a></li>
+ </ul>
+ </div>
+ <div class="col-md-6">
+ <p class="disclaimer">Apache Aurora is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.</p>
+ <p class="disclaimer">Copyright 2014 <a href="http://www.apache.org/">Apache Software Foundation</a>. Licensed under the <a href="http://www.apache.org/licenses/">Apache License v2.0</a>. The <a href="https://www.flickr.com/photos/trondk/12706051375/">Aurora Borealis IX photo</a> displayed on the homepage is available under a <a href="https://creativecommons.org/licenses/by-nc-nd/2.0/">Creative Commons BY-NC-ND 2.0 license</a>. Apache, Apache Aurora, and the Apache feather logo are trademarks of The Apache Software Foundation.</p>
+ </div>
+ </div>
+ </div>
+ </body>
+</html>
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[08/18] incubator-aurora-website git commit: Initial move of website
over to git
Posted by jf...@apache.org.
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/source/assets/img/aurora_logo_ltgreen_bkg.svg
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[15/18] incubator-aurora-website git commit: Initial move of website
over to git
Posted by jf...@apache.org.
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<TRUNCATED>
[14/18] incubator-aurora-website git commit: Initial move of website
over to git
Posted by jf...@apache.org.
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/publish/blog/aurora-0-6-0-incubating-released/index.html
----------------------------------------------------------------------
diff --git a/publish/blog/aurora-0-6-0-incubating-released/index.html b/publish/blog/aurora-0-6-0-incubating-released/index.html
new file mode 100644
index 0000000..4395943
--- /dev/null
+++ b/publish/blog/aurora-0-6-0-incubating-released/index.html
@@ -0,0 +1,157 @@
+<!DOCTYPE html>
+<html lang="en">
+ <head>
+ <meta charset="utf-8">
+ <meta name="viewport" content="width=device-width, initial-scale=1">
+ <title>Apache Aurora</title>
+ <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css">
+ <link href="/assets/css/main.css" rel="stylesheet">
+ <!-- Analytics -->
+ <script type="text/javascript">
+ var _gaq = _gaq || [];
+ _gaq.push(['_setAccount', 'UA-45879646-1']);
+ _gaq.push(['_setDomainName', 'apache.org']);
+ _gaq.push(['_trackPageview']);
+
+ (function() {
+ var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
+ ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
+ var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
+ })();
+ </script>
+ </head>
+ <body>
+
+ <div class="container-fluid section-header">
+ <div class="container">
+ <div class="nav nav-bar">
+ <a href="/"><img src="/assets/img/aurora_logo_white_bkg.svg" width="300" alt="Transparent Apache Aurora logo with dark background"/></a>
+ <ul class="nav navbar-nav navbar-right">
+ <li><a href="/documentation/latest/">Documentation</a></li>
+ <li><a href="/community/">Community</a></li>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/blog/">Blog</a></li>
+ </ul>
+ </div>
+ </div>
+</div>
+ <div class="container-fluid">
+ <div class="container content">
+ <div class="container-fluid">
+
+<div class="row">
+<div class="col-md-3 buffer">
+ <div class="meta">
+ <span class="author">
+
+ <span class="author_contact">
+ <p><strong>Bill Farner</strong></p>
+ <p><a href="http://twitter.com/wfarner">@wfarner</a></p>
+ </span>
+ </span>
+ <p><em>Posted December 8, 2014</em></p>
+ </div>
+
+ <div class="share">
+ <span class="social-share-button"><a href="https://twitter.com/share" class="twitter-share-button" data-via="apachemesos">Tweet</a></span>
+
+ <span><script>!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0],p=/^http:/.test(d.location)?'http':'https';if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src=p+'://platform.twitter.com/widgets.js';fjs.parentNode.insertBefore(js,fjs);}}(document, 'script', 'twitter-wjs');</script></span>
+
+ <script src="//platform.linkedin.com/in.js" type="text/javascript">
+ lang: en_US
+ </script>
+ <script type="IN/Share" data-counter="right"></script>
+ </div>
+</div>
+
+<div class="post col-md-9">
+ <h1>Aurora 0.6.0-incubating Released</h1>
+
+ <p>The latest Apache Aurora release, 0.6.0-incubating, is now available for download. This version marks the second Aurora release since becoming part of the <a href="http://incubator.apache.org">Apache Incubator</a>, and includes the following features and improvements:</p>
+
+<ul>
+<li>Introduced highly-available, scheduler-driven job updates in beta (<a href="https://issues.apache.org/jira/browse/AURORA-610">AURORA-610</a>)</li>
+<li>Improvements to the Aurora web UI, including visualization of job updates</li>
+<li>Added automatic service registration in ZooKeeper (<a href="https://issues.apache.org/jira/browse/AURORA-587">AURORA-587</a>)</li>
+<li>Updates to Aurora client version two, deprecation of v1 coming in future release</li>
+<li>Lots of new <a href="http://aurora.incubator.apache.org/documentation/latest/">documentation</a>. Documentation now includes pages for <a href="http://aurora.incubator.apache.org/documentation/latest/deploying-aurora-scheduler/">deploying the Aurora scheduler</a>, <a href="http://aurora.incubator.apache.org/documentation/latest/cron-jobs/">cron jobs</a>, <a href="http://aurora.incubator.apache.org/documentation/latest/sla/">SLA measurement</a>, <a href="http://aurora.incubator.apache.org/documentation/latest/storage/">storage</a>, and <a href="http://aurora.incubator.apache.org/documentation/latest/storage-config/">storage configuration and measurement</a>.</li>
+</ul>
+
+<p>Full release notes are available in the release <a href="https://git-wip-us.apache.org/repos/asf?p=incubator-aurora.git&f=CHANGELOG&hb=0.6.0-rc2">CHANGELOG</a>.</p>
+
+<h2 id="highly-available,-scheduler-driven-updates">Highly-available, scheduler-driven updates</h2>
+
+<p>Rolling updates of services is a crucial feature in Aurora. As such, we
+want to take great care when changing its behavior. Previously, Aurora operated
+by delegating this functionality to the client (or any API client, for that
+matter). In this version, the scheduler can take over the
+responsibility of application update orchestration. Further details were discussed on the <a href="http://mail-archives.apache.org/mod_mbox/incubator-aurora-dev/201407.mbox/%3CCAGRA8uMxwVDokp_iHXhNru2gd-x_nM%2BDYAurpfAO6wuX7%3DnHFw%40mail.gmail.com%3E">Aurora mailing list</a>.</p>
+
+<h2 id="aurora-web-ui-improvements">Aurora Web UI Improvements</h2>
+
+<p>Since the scheduler can now orchestrate job updates, it has awareness of the progress and outcome of updates. This means you can see a progress bar for in-flight updates, and the history of updates for your jobs. Additionally, the performance of the UI was improved, especially for large roles and jobs <a href="https://issues.apache.org/jira/browse/AURORA-458">AURORA-458</a>.</p>
+
+<h2 id="service-announcement-and-management">Service Announcement and Management</h2>
+
+<p>Job configurations can now supply an <a href="http://aurora.incubator.apache.org/documentation/latest/configuration-reference/#announcer-objects"><code>announce</code> parameter</a>, which is meant to be a way to opt-in for registration in a service discovery system. This has been implemented in the Aurora executor, and will automatically announce tasks via ZooKeeper.</p>
+
+<h2 id="aurora-client-improvements">Aurora Client Improvements</h2>
+
+<p>Progress was made in features to <a href="http://aurora.incubator.apache.org/documentation/latest/clientv2/">v2</a> of the <a href="http://aurora.incubator.apache.org/documentation/latest/client-commands/">Aurora client</a>. We will support version 1 and version 2 for 0.6.0, with version 1 to be removed in 0.7.0.</p>
+
+<h2 id="improved-project-documentation">Improved Project Documentation</h2>
+
+<p>New documentation pages including:</p>
+
+<ul>
+<li><a href="http://aurora.incubator.apache.org/documentation/latest/deploying-aurora-scheduler/">Deploying the Aurora scheduler</a></li>
+<li><a href="http://aurora.incubator.apache.org/documentation/latest/cron-jobs/">Cron jobs</a></li>
+<li><a href="http://aurora.incubator.apache.org/documentation/latest/sla/">SLA measurement</a></li>
+<li><a href="http://aurora.incubator.apache.org/documentation/latest/storage/">Storage</a></li>
+<li><a href="http://aurora.incubator.apache.org/documentation/latest/storage-config/">Storage configuration and measurement</a></li>
+<li><a href="http://aurora.incubator.apache.org/documentation/latest/monitoring/">Monitoring</a></li>
+</ul>
+
+<h2 id="getting-involved">Getting Involved</h2>
+
+<p>We encourage you to try out this release and let us know what you think. If you run into any issues, please let us know on the <a href="https://aurora.apache.org/community">user mailing list and IRC</a>. The community also holds weekly IRC meetings at 11AM Pacific every Monday that you are welcome to join.</p>
+
+<h2 id="thanks">Thanks</h2>
+
+<p>Thanks to the 16 contributors who made 0.6.0-incubating possible:</p>
+
+<p>Bill Farner, Maxim Khutornenko, Kevin Sweeney, Mark Chu-Carroll, Joshua Cohen, Zameer Manji, David McLaughlin, Brian Wickman, Joe Smith, Jake Farrell, Matthew Jeffryes, Dominic Hamon, Bjoern Metzdorf, Joseph Glanville, David Robinson, David Pan.</p>
+
+</div>
+</div>
+
+ </div>
+ </div>
+
+ <div class="container-fluid section-footer buffer">
+ <div class="container">
+ <div class="row">
+ <div class="col-md-2 col-md-offset-1"><h3>Quick Links</h3>
+ <ul>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/community/">Mailing Lists</a></li>
+ <li><a href="http://issues.apache.org/jira/browse/AURORA">Issue Tracking</a></li>
+ <li><a href="/documentation/latest/contributing/">How To Contribute</a></li>
+ </ul>
+ </div>
+ <div class="col-md-2"><h3>The ASF</h3>
+ <ul>
+ <li><a href="http://www.apache.org/licenses/">License</a></li>
+ <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+ <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
+ <li><a href="http://www.apache.org/security/">Security</a></li>
+ </ul>
+ </div>
+ <div class="col-md-6">
+ <p class="disclaimer">Apache Aurora is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.</p>
+ <p class="disclaimer">Copyright 2014 <a href="http://www.apache.org/">Apache Software Foundation</a>. Licensed under the <a href="http://www.apache.org/licenses/">Apache License v2.0</a>. The <a href="https://www.flickr.com/photos/trondk/12706051375/">Aurora Borealis IX photo</a> displayed on the homepage is available under a <a href="https://creativecommons.org/licenses/by-nc-nd/2.0/">Creative Commons BY-NC-ND 2.0 license</a>. Apache, Apache Aurora, and the Apache feather logo are trademarks of The Apache Software Foundation.</p>
+ </div>
+ </div>
+ </div>
+ </body>
+</html>
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/publish/blog/feed.xml
----------------------------------------------------------------------
diff --git a/publish/blog/feed.xml b/publish/blog/feed.xml
new file mode 100644
index 0000000..8a83912
--- /dev/null
+++ b/publish/blog/feed.xml
@@ -0,0 +1,78 @@
+
+<feed xmlns="http://www.w3.org/2005/Atom">
+ <title>Apache Aurora Blog</title>
+ <id>http://aurora.incubator.apache.org/blog</id>
+ <link href="http://aurora.incubator.apache.org/blog" />
+ <link href="http://aurora.incubator.apache.org/blog/feed.xml" rel="self"/>
+ <updated>2014-12-08T00:00:00Z</updated>
+
+ <entry>
+ <id>http://aurora.incubator.apache.org/blog/aurora-0-6-0-incubating-released/</id>
+ <link href="/blog/aurora-0-6-0-incubating-released/" />
+ <title>
+ Aurora 0.6.0-incubating Released
+ </title>
+ <updated>2014-12-08T00:00:00Z</updated>
+ <author>
+ <name>Bill Farner</name>
+ </author>
+ <content type="html">
+ <p>The latest Apache Aurora release, 0.6.0-incubating, is now available for download. This version marks the second Aurora release since becoming part of the <a href="http://incubator.apache.org">Apache Incubator</a>, and includes the following features and improvements:</p>
+
+<ul>
+<li>Introduced highly-available, scheduler-driven job updates in beta (<a href="https://issues.apache.org/jira/browse/AURORA-610">AURORA-610</a>)</li>
+<li>Improvements to the Aurora web UI, including visualization of job updates</li>
+<li>Added automatic service registration in ZooKeeper (<a href="https://issues.apache.org/jira/browse/AURORA-587">AURORA-587</a>)</li>
+<li>Updates to Aurora client version two, deprecation of v1 coming in future release</li>
+<li>Lots of new <a href="http://aurora.incubator.apache.org/documentation/latest/">documentation</a>. Documentation now includes pages for <a href="http://aurora.incubator.apache.org/documentation/latest/deploying-aurora-scheduler/">deploying the Aurora scheduler</a>, <a href="http://aurora.incubator.apache.org/documentation/latest/cron-jobs/">cron jobs</a>, <a href="http://aurora.incubator.apache.org/documentation/latest/sla/">SLA measurement</a>, <a href="http://aurora.incubator.apache.org/documentation/latest/storage/">storage</a>, and <a href="http://aurora.incubator.apache.org/documentation/latest/storage-config/">storage configuration and measurement</a>.</li>
+</ul>
+
+<p>Full release notes are available in the release <a href="https://git-wip-us.apache.org/repos/asf?p=incubator-aurora.git&amp;f=CHANGELOG&amp;hb=0.6.0-rc2">CHANGELOG</a>.</p>
+
+<h2 id="highly-available,-scheduler-driven-updates">Highly-available, scheduler-driven updates</h2>
+
+<p>Rolling updates of services is a crucial feature in Aurora. As such, we
+want to take great care when changing its behavior. Previously, Aurora operated
+by delegating this functionality to the client (or any API client, for that
+matter). In this version, the scheduler can take over the
+responsibility of application update orchestration. Further details were discussed on the <a href="http://mail-archives.apache.org/mod_mbox/incubator-aurora-dev/201407.mbox/%3CCAGRA8uMxwVDokp_iHXhNru2gd-x_nM%2BDYAurpfAO6wuX7%3DnHFw%40mail.gmail.com%3E">Aurora mailing list</a>.</p>
+
+<h2 id="aurora-web-ui-improvements">Aurora Web UI Improvements</h2>
+
+<p>Since the scheduler can now orchestrate job updates, it has awareness of the progress and outcome of updates. This means you can see a progress bar for in-flight updates, and the history of updates for your jobs. Additionally, the performance of the UI was improved, especially for large roles and jobs <a href="https://issues.apache.org/jira/browse/AURORA-458">AURORA-458</a>.</p>
+
+<h2 id="service-announcement-and-management">Service Announcement and Management</h2>
+
+<p>Job configurations can now supply an <a href="http://aurora.incubator.apache.org/documentation/latest/configuration-reference/#announcer-objects"><code>announce</code> parameter</a>, which is meant to be a way to opt-in for registration in a service discovery system. This has been implemented in the Aurora executor, and will automatically announce tasks via ZooKeeper.</p>
+
+<h2 id="aurora-client-improvements">Aurora Client Improvements</h2>
+
+<p>Progress was made in features to <a href="http://aurora.incubator.apache.org/documentation/latest/clientv2/">v2</a> of the <a href="http://aurora.incubator.apache.org/documentation/latest/client-commands/">Aurora client</a>. We will support version 1 and version 2 for 0.6.0, with version 1 to be removed in 0.7.0.</p>
+
+<h2 id="improved-project-documentation">Improved Project Documentation</h2>
+
+<p>New documentation pages including:</p>
+
+<ul>
+<li><a href="http://aurora.incubator.apache.org/documentation/latest/deploying-aurora-scheduler/">Deploying the Aurora scheduler</a></li>
+<li><a href="http://aurora.incubator.apache.org/documentation/latest/cron-jobs/">Cron jobs</a></li>
+<li><a href="http://aurora.incubator.apache.org/documentation/latest/sla/">SLA measurement</a></li>
+<li><a href="http://aurora.incubator.apache.org/documentation/latest/storage/">Storage</a></li>
+<li><a href="http://aurora.incubator.apache.org/documentation/latest/storage-config/">Storage configuration and measurement</a></li>
+<li><a href="http://aurora.incubator.apache.org/documentation/latest/monitoring/">Monitoring</a></li>
+</ul>
+
+<h2 id="getting-involved">Getting Involved</h2>
+
+<p>We encourage you to try out this release and let us know what you think. If you run into any issues, please let us know on the <a href="https://aurora.apache.org/community">user mailing list and IRC</a>. The community also holds weekly IRC meetings at 11AM Pacific every Monday that you are welcome to join.</p>
+
+<h2 id="thanks">Thanks</h2>
+
+<p>Thanks to the 16 contributors who made 0.6.0-incubating possible:</p>
+
+<p>Bill Farner, Maxim Khutornenko, Kevin Sweeney, Mark Chu-Carroll, Joshua Cohen, Zameer Manji, David McLaughlin, Brian Wickman, Joe Smith, Jake Farrell, Matthew Jeffryes, Dominic Hamon, Bjoern Metzdorf, Joseph Glanville, David Robinson, David Pan.</p>
+
+ </content>
+ </entry>
+
+</feed>
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+<!DOCTYPE html>
+<html lang="en">
+ <head>
+ <meta charset="utf-8">
+ <meta name="viewport" content="width=device-width, initial-scale=1">
+ <title>Apache Aurora</title>
+ <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css">
+ <link href="/assets/css/main.css" rel="stylesheet">
+ <!-- Analytics -->
+ <script type="text/javascript">
+ var _gaq = _gaq || [];
+ _gaq.push(['_setAccount', 'UA-45879646-1']);
+ _gaq.push(['_setDomainName', 'apache.org']);
+ _gaq.push(['_trackPageview']);
+
+ (function() {
+ var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
+ ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
+ var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
+ })();
+ </script>
+ </head>
+ <body>
+
+ <div class="container-fluid section-header">
+ <div class="container">
+ <div class="nav nav-bar">
+ <a href="/"><img src="/assets/img/aurora_logo_white_bkg.svg" width="300" alt="Transparent Apache Aurora logo with dark background"/></a>
+ <ul class="nav navbar-nav navbar-right">
+ <li><a href="/documentation/latest/">Documentation</a></li>
+ <li><a href="/community/">Community</a></li>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/blog/">Blog</a></li>
+ </ul>
+ </div>
+ </div>
+</div>
+ <div class="container-fluid">
+ <div class="container content">
+ <div class="row-fluid">
+ <div class="col-md-3">
+ <h4>Apache Aurora Blog</h4>
+ <p>The Aurora blog is a place for release announcements and for project committers to highlight features of the software.</p>
+ </div>
+ <div class="col-md-9">
+
+ <article>
+ <h2><a href="/blog/aurora-0-6-0-incubating-released/">Aurora 0.6.0-incubating Released</a></h2>
+ <p><em>Posted by Bill Farner, December 8, 2014</em></p>
+ </article>
+
+ </div>
+</div>
+ </div>
+ </div>
+
+ <div class="container-fluid section-footer buffer">
+ <div class="container">
+ <div class="row">
+ <div class="col-md-2 col-md-offset-1"><h3>Quick Links</h3>
+ <ul>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/community/">Mailing Lists</a></li>
+ <li><a href="http://issues.apache.org/jira/browse/AURORA">Issue Tracking</a></li>
+ <li><a href="/documentation/latest/contributing/">How To Contribute</a></li>
+ </ul>
+ </div>
+ <div class="col-md-2"><h3>The ASF</h3>
+ <ul>
+ <li><a href="http://www.apache.org/licenses/">License</a></li>
+ <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+ <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
+ <li><a href="http://www.apache.org/security/">Security</a></li>
+ </ul>
+ </div>
+ <div class="col-md-6">
+ <p class="disclaimer">Apache Aurora is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.</p>
+ <p class="disclaimer">Copyright 2014 <a href="http://www.apache.org/">Apache Software Foundation</a>. Licensed under the <a href="http://www.apache.org/licenses/">Apache License v2.0</a>. The <a href="https://www.flickr.com/photos/trondk/12706051375/">Aurora Borealis IX photo</a> displayed on the homepage is available under a <a href="https://creativecommons.org/licenses/by-nc-nd/2.0/">Creative Commons BY-NC-ND 2.0 license</a>. Apache, Apache Aurora, and the Apache feather logo are trademarks of The Apache Software Foundation.</p>
+ </div>
+ </div>
+ </div>
+ </body>
+</html>
\ No newline at end of file
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+<!DOCTYPE html>
+<html lang="en">
+ <head>
+ <meta charset="utf-8">
+ <meta name="viewport" content="width=device-width, initial-scale=1">
+ <title>Apache Aurora</title>
+ <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css">
+ <link href="/assets/css/main.css" rel="stylesheet">
+ <!-- Analytics -->
+ <script type="text/javascript">
+ var _gaq = _gaq || [];
+ _gaq.push(['_setAccount', 'UA-45879646-1']);
+ _gaq.push(['_setDomainName', 'apache.org']);
+ _gaq.push(['_trackPageview']);
+
+ (function() {
+ var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
+ ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
+ var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
+ })();
+ </script>
+ </head>
+ <body>
+
+ <div class="container-fluid section-header">
+ <div class="container">
+ <div class="nav nav-bar">
+ <a href="/"><img src="/assets/img/aurora_logo_white_bkg.svg" width="300" alt="Transparent Apache Aurora logo with dark background"/></a>
+ <ul class="nav navbar-nav navbar-right">
+ <li><a href="/documentation/latest/">Documentation</a></li>
+ <li><a href="/community/">Community</a></li>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/blog/">Blog</a></li>
+ </ul>
+ </div>
+ </div>
+</div>
+ <div class="container-fluid">
+ <div class="container content">
+ <h1 id="community">Community</h1>
+
+<div class="row-fluid">
+ <div class="col-md-4">
+ <h3>Contributing to Aurora</h3>
+ <h4 name="reportbugs">Report or track a bug</h4>
+ <p>Bugs can be reported on our <a href="http://issues.apache.org/jira/browse/AURORA">JIRA issue tracker</a>. In order to create a new issue, you’ll need register for an account.</p>
+
+ <h4 name="contribute">Submit a core patch</h4>
+ <p>Please follow our <a href="/docs/howtocontribute/">contribution guidelines</a> when submitting a patch. We welcome them!</p>
+ </div>
+ <div class="col-md-4">
+ <h3>Stay in Touch</h3>
+ <h4>Mailing lists</h4>
+ <p><strong>Developers</strong> - <a href="mailto:dev-subscribe@aurora.incubator.apache.org">Subscribe</a> | <a href="mailto:dev-unsubscribe@aurora.incubator.apache.org">Unsubscribe</a> | <a href="http://mail-archives.apache.org/mod_mbox/incubator-aurora-dev/">Archive</a><br />
+
+ <strong>Issues</strong> - <a href="mailto:issues-subscribe@aurora.incubator.apache.org">Subscribe</a> | <a href="mailto:issues-unsubscribe@aurora.incubator.apache.org">Unsubscribe</a> | <a href="http://mail-archives.apache.org/mod_mbox/incubator-aurora-issues/">Archive</a><br />
+
+ <strong>Commits</strong> - <a href="mailto:commits-subscribe@aurora.incubator.apache.org">Subscribe</a> | <a href="mailto:commits-unsubscribe@aurora.incubator.apache.org">Unsubscribe</a> | <a href="http://mail-archives.apache.org/mod_mbox/incubator-aurora-commits/">Archive</a><br />
+
+ <strong>Reviews</strong> - <a href="mailto:reviews-subscribe@aurora.incubator.apache.org">Subscribe</a> | <a href="mailto:reviews-unsubscribe@aurora.incubator.apache.org">Unsubscribe</a> | <a href="http://mail-archives.apache.org/mod_mbox/incubator-aurora-reviews/">Archive</a></p>
+
+ <h4 name="ircchannel">IRC</h4>
+ <p>Developers and users hang out in <code>#aurora</code> on <code>irc.freenode.net</code>. If you’re new to IRC, we suggest trying a <a href="http://webchat.freenode.net/?channels=#aurora">web-based client</a>.</p>
+
+ <h4>Join our weekly IRC meetings</h4>
+ <p>We hold weekly IRC meetings as an opportunity for users and developers to engage. Meetings are every Monday at <a href="http://www.timeanddate.com/worldclock/fixedtime.html?msg=Aurora+Weekly+Meeting&iso=20140421T11&p1=224&ah=1">11AM Pacific Time</a>.</p>
+ </div>
+ <div class="col-md-4">
+ <h3>Follow the Project</h3>
+ <a class="twitter-timeline" href="https://twitter.com/ApacheAurora" data-widget-id="512693636127920129">Tweets by @ApacheMesos</a>
+ <script>!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0],p=/^http:/.test(d.location)?'http':'https';if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src=p+"://platform.twitter.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs");</script>
+ </div>
+</div>
+
+ </div>
+ </div>
+
+ <div class="container-fluid section-footer buffer">
+ <div class="container">
+ <div class="row">
+ <div class="col-md-2 col-md-offset-1"><h3>Quick Links</h3>
+ <ul>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/community/">Mailing Lists</a></li>
+ <li><a href="http://issues.apache.org/jira/browse/AURORA">Issue Tracking</a></li>
+ <li><a href="/documentation/latest/contributing/">How To Contribute</a></li>
+ </ul>
+ </div>
+ <div class="col-md-2"><h3>The ASF</h3>
+ <ul>
+ <li><a href="http://www.apache.org/licenses/">License</a></li>
+ <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+ <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
+ <li><a href="http://www.apache.org/security/">Security</a></li>
+ </ul>
+ </div>
+ <div class="col-md-6">
+ <p class="disclaimer">Apache Aurora is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.</p>
+ <p class="disclaimer">Copyright 2014 <a href="http://www.apache.org/">Apache Software Foundation</a>. Licensed under the <a href="http://www.apache.org/licenses/">Apache License v2.0</a>. The <a href="https://www.flickr.com/photos/trondk/12706051375/">Aurora Borealis IX photo</a> displayed on the homepage is available under a <a href="https://creativecommons.org/licenses/by-nc-nd/2.0/">Creative Commons BY-NC-ND 2.0 license</a>. Apache, Apache Aurora, and the Apache feather logo are trademarks of The Apache Software Foundation.</p>
+ </div>
+ </div>
+ </div>
+ </body>
+</html>
\ No newline at end of file
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+<!DOCTYPE html>
+<html lang="en">
+ <head>
+ <meta charset="utf-8">
+ <meta name="viewport" content="width=device-width, initial-scale=1">
+ <title>Apache Aurora</title>
+ <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css">
+ <link href="/assets/css/main.css" rel="stylesheet">
+ <!-- Analytics -->
+ <script type="text/javascript">
+ var _gaq = _gaq || [];
+ _gaq.push(['_setAccount', 'UA-45879646-1']);
+ _gaq.push(['_setDomainName', 'apache.org']);
+ _gaq.push(['_trackPageview']);
+
+ (function() {
+ var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
+ ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
+ var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
+ })();
+ </script>
+ </head>
+ <body>
+
+ <div class="container-fluid section-header">
+ <div class="container">
+ <div class="nav nav-bar">
+ <a href="/"><img src="/assets/img/aurora_logo_white_bkg.svg" width="300" alt="Transparent Apache Aurora logo with dark background"/></a>
+ <ul class="nav navbar-nav navbar-right">
+ <li><a href="/documentation/latest/">Documentation</a></li>
+ <li><a href="/community/">Community</a></li>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/blog/">Blog</a></li>
+ </ul>
+ </div>
+ </div>
+</div>
+ <div class="container-fluid">
+ <div class="container content">
+ <h1 id="developers">Developers</h1>
+
+<div class="row-fluid">
+ <h4 name="reportbugs">Report or track a bug</h4>
+ <p>New bugs can be reported on our <a href="http://issues.apache.org/jira/browse/AURORA">Jira issue tracker</a>. In order to create a new issue, you’ll need to signup for an account.</p>
+
+ <h4 name="contribute">Contribute a core patch</h4>
+ <p>Follow our <a href="/docs/howtocontribute/">contribution guidelines</a> when submitting a patch.</p>
+
+ <h4 name="ircchannel">IRC Channel</h4>
+ <p>Many of the Aurora developers and users chat in the #aurora channel on irc.freenode.net.</p>
+
+ <p>If you are new to IRC, you can use a <a href="http://webchat.freenode.net/?channels=#aurora">web-based client</a>.</p>
+</div>
+
+ </div>
+ </div>
+
+ <div class="container-fluid section-footer buffer">
+ <div class="container">
+ <div class="row">
+ <div class="col-md-2 col-md-offset-1"><h3>Quick Links</h3>
+ <ul>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/community/">Mailing Lists</a></li>
+ <li><a href="http://issues.apache.org/jira/browse/AURORA">Issue Tracking</a></li>
+ <li><a href="/documentation/latest/contributing/">How To Contribute</a></li>
+ </ul>
+ </div>
+ <div class="col-md-2"><h3>The ASF</h3>
+ <ul>
+ <li><a href="http://www.apache.org/licenses/">License</a></li>
+ <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+ <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
+ <li><a href="http://www.apache.org/security/">Security</a></li>
+ </ul>
+ </div>
+ <div class="col-md-6">
+ <p class="disclaimer">Apache Aurora is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.</p>
+ <p class="disclaimer">Copyright 2014 <a href="http://www.apache.org/">Apache Software Foundation</a>. Licensed under the <a href="http://www.apache.org/licenses/">Apache License v2.0</a>. The <a href="https://www.flickr.com/photos/trondk/12706051375/">Aurora Borealis IX photo</a> displayed on the homepage is available under a <a href="https://creativecommons.org/licenses/by-nc-nd/2.0/">Creative Commons BY-NC-ND 2.0 license</a>. Apache, Apache Aurora, and the Apache feather logo are trademarks of The Apache Software Foundation.</p>
+ </div>
+ </div>
+ </div>
+ </body>
+</html>
\ No newline at end of file
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+<!DOCTYPE html>
+<html lang="en">
+ <head>
+ <meta charset="utf-8">
+ <meta name="viewport" content="width=device-width, initial-scale=1">
+ <title>Apache Aurora</title>
+ <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css">
+ <link href="/assets/css/main.css" rel="stylesheet">
+ <!-- Analytics -->
+ <script type="text/javascript">
+ var _gaq = _gaq || [];
+ _gaq.push(['_setAccount', 'UA-45879646-1']);
+ _gaq.push(['_setDomainName', 'apache.org']);
+ _gaq.push(['_trackPageview']);
+
+ (function() {
+ var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
+ ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
+ var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
+ })();
+ </script>
+ </head>
+ <body>
+
+ <div class="container-fluid section-header">
+ <div class="container">
+ <div class="nav nav-bar">
+ <a href="/"><img src="/assets/img/aurora_logo_white_bkg.svg" width="300" alt="Transparent Apache Aurora logo with dark background"/></a>
+ <ul class="nav navbar-nav navbar-right">
+ <li><a href="/documentation/latest/">Documentation</a></li>
+ <li><a href="/community/">Community</a></li>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/blog/">Blog</a></li>
+ </ul>
+ </div>
+ </div>
+</div>
+ <div class="container-fluid">
+ <div class="container content">
+ <h1 id="getting-started">Getting Started</h1>
+
+<p>The Aurora ‘Getting Started’ guide is <a href="https://github.com/apache/incubator-aurora/blob/master/README.md">currently available on github</a> while the project moves its documentation to the Apache Software Foundation.</p>
+
+ </div>
+ </div>
+
+ <div class="container-fluid section-footer buffer">
+ <div class="container">
+ <div class="row">
+ <div class="col-md-2 col-md-offset-1"><h3>Quick Links</h3>
+ <ul>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/community/">Mailing Lists</a></li>
+ <li><a href="http://issues.apache.org/jira/browse/AURORA">Issue Tracking</a></li>
+ <li><a href="/documentation/latest/contributing/">How To Contribute</a></li>
+ </ul>
+ </div>
+ <div class="col-md-2"><h3>The ASF</h3>
+ <ul>
+ <li><a href="http://www.apache.org/licenses/">License</a></li>
+ <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+ <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
+ <li><a href="http://www.apache.org/security/">Security</a></li>
+ </ul>
+ </div>
+ <div class="col-md-6">
+ <p class="disclaimer">Apache Aurora is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.</p>
+ <p class="disclaimer">Copyright 2014 <a href="http://www.apache.org/">Apache Software Foundation</a>. Licensed under the <a href="http://www.apache.org/licenses/">Apache License v2.0</a>. The <a href="https://www.flickr.com/photos/trondk/12706051375/">Aurora Borealis IX photo</a> displayed on the homepage is available under a <a href="https://creativecommons.org/licenses/by-nc-nd/2.0/">Creative Commons BY-NC-ND 2.0 license</a>. Apache, Apache Aurora, and the Apache feather logo are trademarks of The Apache Software Foundation.</p>
+ </div>
+ </div>
+ </div>
+ </body>
+</html>
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+<!DOCTYPE html>
+<html lang="en">
+ <head>
+ <meta charset="utf-8">
+ <meta name="viewport" content="width=device-width, initial-scale=1">
+ <title>Apache Aurora</title>
+ <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css">
+ <link href="/assets/css/main.css" rel="stylesheet">
+ <!-- Analytics -->
+ <script type="text/javascript">
+ var _gaq = _gaq || [];
+ _gaq.push(['_setAccount', 'UA-45879646-1']);
+ _gaq.push(['_setDomainName', 'apache.org']);
+ _gaq.push(['_trackPageview']);
+
+ (function() {
+ var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
+ ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
+ var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
+ })();
+ </script>
+ </head>
+ <body>
+
+ <div class="container-fluid section-header">
+ <div class="container">
+ <div class="nav nav-bar">
+ <a href="/"><img src="/assets/img/aurora_logo_white_bkg.svg" width="300" alt="Transparent Apache Aurora logo with dark background"/></a>
+ <ul class="nav navbar-nav navbar-right">
+ <li><a href="/documentation/latest/">Documentation</a></li>
+ <li><a href="/community/">Community</a></li>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/blog/">Blog</a></li>
+ </ul>
+ </div>
+ </div>
+</div>
+ <div class="container-fluid">
+ <div class="container content">
+ <h1 id="how-to-contribute">How To Contribute</h1>
+
+<h2 id="getting-your-reviewboard-account">Getting your ReviewBoard Account</h2>
+
+<p>Go to <a href="https://reviews.apache.org">https://reviews.apache.org</a> and create an account.</p>
+
+<h2 id="setting-up-your-reviewboard-environment">Setting up your ReviewBoard Environment</h2>
+
+<p>Run <code>./rbt status</code>. The first time this runs it will bootstrap and you will be asked to login.
+Subsequent runs will cache your login credentials.</p>
+
+<h2 id="submitting-a-patch-for-review">Submitting a Patch for Review</h2>
+
+<p>Post a review with <code>rbt</code>, fill out the fields in your browser and hit Publish.</p>
+<pre class="highlight text">./rbt post -o -g
+</pre>
+<h2 id="updating-an-existing-review">Updating an Existing Review</h2>
+
+<p>Incorporate review feedback, make some more commits, update your existing review, fill out the
+fields in your browser and hit Publish.</p>
+<pre class="highlight text">./rbt post -o -r <RB_ID>
+</pre>
+<h2 id="merging-your-own-review-(committers)">Merging Your Own Review (Committers)</h2>
+
+<p>Once you have shipits from the right committers, merge your changes in a single commit and mark
+the review as submitted. The typical workflow is:</p>
+<pre class="highlight text">git checkout master
+git pull origin master
+./rbt patch -c <RB_ID> # Verify the automatically-generated commit message looks sane,
+ # editing if necessary.
+git show master # Verify everything looks sane
+git push origin master
+./rbt close <RB_ID>
+</pre>
+<p>Note that even if you’re developing using feature branches you will not use <code>git merge</code> - each
+commit will be an atomic change accompanied by a ReviewBoard entry.</p>
+
+<h2 id="merging-someone-else's-review">Merging Someone Else’s Review</h2>
+
+<p>Sometimes you’ll need to merge someone else’s RB. The typical workflow for this is</p>
+<pre class="highlight text">git checkout master
+git pull origin master
+./rbt patch -c <RB_ID>
+git show master # Verify everything looks sane, author is correct
+git push origin master
+</pre>
+ </div>
+ </div>
+
+ <div class="container-fluid section-footer buffer">
+ <div class="container">
+ <div class="row">
+ <div class="col-md-2 col-md-offset-1"><h3>Quick Links</h3>
+ <ul>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/community/">Mailing Lists</a></li>
+ <li><a href="http://issues.apache.org/jira/browse/AURORA">Issue Tracking</a></li>
+ <li><a href="/documentation/latest/contributing/">How To Contribute</a></li>
+ </ul>
+ </div>
+ <div class="col-md-2"><h3>The ASF</h3>
+ <ul>
+ <li><a href="http://www.apache.org/licenses/">License</a></li>
+ <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+ <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
+ <li><a href="http://www.apache.org/security/">Security</a></li>
+ </ul>
+ </div>
+ <div class="col-md-6">
+ <p class="disclaimer">Apache Aurora is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.</p>
+ <p class="disclaimer">Copyright 2014 <a href="http://www.apache.org/">Apache Software Foundation</a>. Licensed under the <a href="http://www.apache.org/licenses/">Apache License v2.0</a>. The <a href="https://www.flickr.com/photos/trondk/12706051375/">Aurora Borealis IX photo</a> displayed on the homepage is available under a <a href="https://creativecommons.org/licenses/by-nc-nd/2.0/">Creative Commons BY-NC-ND 2.0 license</a>. Apache, Apache Aurora, and the Apache feather logo are trademarks of The Apache Software Foundation.</p>
+ </div>
+ </div>
+ </div>
+ </body>
+</html>
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+<!DOCTYPE html>
+<html lang="en">
+ <head>
+ <meta charset="utf-8">
+ <meta name="viewport" content="width=device-width, initial-scale=1">
+ <title>Apache Aurora</title>
+ <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css">
+ <link href="/assets/css/main.css" rel="stylesheet">
+ <!-- Analytics -->
+ <script type="text/javascript">
+ var _gaq = _gaq || [];
+ _gaq.push(['_setAccount', 'UA-45879646-1']);
+ _gaq.push(['_setDomainName', 'apache.org']);
+ _gaq.push(['_trackPageview']);
+
+ (function() {
+ var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
+ ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
+ var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
+ })();
+ </script>
+ </head>
+ <body>
+
+ <div class="container-fluid section-header">
+ <div class="container">
+ <div class="nav nav-bar">
+ <a href="/"><img src="/assets/img/aurora_logo_white_bkg.svg" width="300" alt="Transparent Apache Aurora logo with dark background"/></a>
+ <ul class="nav navbar-nav navbar-right">
+ <li><a href="/documentation/latest/">Documentation</a></li>
+ <li><a href="/community/">Community</a></li>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/blog/">Blog</a></li>
+ </ul>
+ </div>
+ </div>
+</div>
+ <div class="container-fluid">
+ <div class="container content">
+ <h1 id="client-cluster-configuration">Client Cluster Configuration</h1>
+
+<p>A cluster configuration file is used by the Aurora client to describe the Aurora clusters with
+which it can communicate. Ultimately this allows client users to reference clusters with short names
+like us-east and eu. The following properties may be set:</p>
+
+<table><thead>
+<tr>
+<th style="text-align: left"><strong>Property</strong></th>
+<th style="text-align: left"><strong>Type</strong></th>
+<th style="text-align: left"><strong>Description</strong></th>
+</tr>
+</thead><tbody>
+<tr>
+<td style="text-align: left"><strong>name</strong></td>
+<td style="text-align: left">String</td>
+<td style="text-align: left">Cluster name (Required)</td>
+</tr>
+<tr>
+<td style="text-align: left"><strong>slave_root</strong></td>
+<td style="text-align: left">String</td>
+<td style="text-align: left">Path to mesos slave work dir (Required)</td>
+</tr>
+<tr>
+<td style="text-align: left"><strong>slave<em>run</em>directory</strong></td>
+<td style="text-align: left">String</td>
+<td style="text-align: left">Name of mesos slave run dir (Required)</td>
+</tr>
+<tr>
+<td style="text-align: left"><strong>zk</strong></td>
+<td style="text-align: left">String</td>
+<td style="text-align: left">Hostname of ZooKeeper instance used to resolve Aurora schedulers.</td>
+</tr>
+<tr>
+<td style="text-align: left"><strong>zk_port</strong></td>
+<td style="text-align: left">Integer</td>
+<td style="text-align: left">Port of ZooKeeper instance used to locate Aurora schedulers (Default: 2181)</td>
+</tr>
+<tr>
+<td style="text-align: left"><strong>scheduler<em>zk</em>path</strong></td>
+<td style="text-align: left">String</td>
+<td style="text-align: left">ZooKeeper path under which scheduler instances are registered.</td>
+</tr>
+<tr>
+<td style="text-align: left"><strong>scheduler_uri</strong></td>
+<td style="text-align: left">String</td>
+<td style="text-align: left">URI of Aurora scheduler instance.</td>
+</tr>
+<tr>
+<td style="text-align: left"><strong>proxy_url</strong></td>
+<td style="text-align: left">String</td>
+<td style="text-align: left">Used by the client to format URLs for display.</td>
+</tr>
+<tr>
+<td style="text-align: left"><strong>auth_mechanism</strong></td>
+<td style="text-align: left">String</td>
+<td style="text-align: left">The authentication mechanism to use when communicating with the scheduler. (Default: UNAUTHENTICATED)</td>
+</tr>
+</tbody></table>
+
+<h4 id="name">name</h4>
+
+<p>The name of the Aurora cluster represented by this entry. This name will be the <code>cluster</code> portion of
+any job keys identifying jobs running within the cluster.</p>
+
+<h4 id="slave_root">slave_root</h4>
+
+<p>The path on the mesos slaves where executing tasks can be found. It is used in combination with the
+<code>slave_run_directory</code> property by <code>aurora task run</code> and <code>aurora task ssh</code> to change into the sandbox
+directory after connecting to the host. This value should match the value passed to <code>mesos-slave</code>
+as <code>-work_dir</code>.</p>
+
+<h4 id="slaverundirectory">slave<em>run</em>directory</h4>
+
+<p>The name of the directory where the task run can be found. This is used in combination with the
+<code>slave_root</code> property by <code>aurora task run</code> and <code>aurora task ssh</code> to change into the sandbox
+directory after connecting to the host. This should almost always be set to <code>latest</code>.</p>
+
+<h4 id="zk">zk</h4>
+
+<p>The hostname of the ZooKeeper instance used to resolve the Aurora scheduler. Aurora uses ZooKeeper
+to elect a leader. The client will connect to this ZooKeeper instance to determine the current
+leader. This host should match the host passed to the scheduler as <code>-zk_endpoints</code>.</p>
+
+<h4 id="zk_port">zk_port</h4>
+
+<p>The port on which the ZooKeeper instance is running. If not set this will default to the standard
+ZooKeeper port of 2181. This port should match the port in the host passed to the scheduler as
+<code>-zk_endpoints</code>.</p>
+
+<h4 id="schedulerzkpath">scheduler<em>zk</em>path</h4>
+
+<p>The path on the ZooKeeper instance under which the Aurora serverset is registered. This value should
+match the value passed to the scheduler as <code>-serverset_path</code>.</p>
+
+<h4 id="scheduler_uri">scheduler_uri</h4>
+
+<p>The URI of the scheduler. This would be used in place of the ZooKeeper related configuration above
+in circumstances where direct communication with a single scheduler is needed (e.g. testing
+environments). It is strongly advised to <strong>never</strong> use this property for production deploys.</p>
+
+<h4 id="proxy_url">proxy_url</h4>
+
+<p>Instead of using the hostname of the leading scheduler as the base url, if <code>proxy_url</code> is set, its
+value will be used instead. In that scenario the value for <code>proxy_url</code> would be, for example, the
+URL of your VIP in a loadbalancer or a roundrobin DNS name.</p>
+
+<h4 id="auth_mechanism">auth_mechanism</h4>
+
+<p>The identifier of an authentication mechanism that the client should use when communicating with the
+scheduler. Support for values other than <code>UNAUTHENTICATED</code> is currently not available, however work
+is <a href="https://issues.apache.org/jira/browse/AURORA-720">in progress</a> to add federated authentication
+to Aurora which will allow for more robust configuration of client/scheduler authentication.</p>
+
+ </div>
+ </div>
+
+ <div class="container-fluid section-footer buffer">
+ <div class="container">
+ <div class="row">
+ <div class="col-md-2 col-md-offset-1"><h3>Quick Links</h3>
+ <ul>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/community/">Mailing Lists</a></li>
+ <li><a href="http://issues.apache.org/jira/browse/AURORA">Issue Tracking</a></li>
+ <li><a href="/documentation/latest/contributing/">How To Contribute</a></li>
+ </ul>
+ </div>
+ <div class="col-md-2"><h3>The ASF</h3>
+ <ul>
+ <li><a href="http://www.apache.org/licenses/">License</a></li>
+ <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+ <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
+ <li><a href="http://www.apache.org/security/">Security</a></li>
+ </ul>
+ </div>
+ <div class="col-md-6">
+ <p class="disclaimer">Apache Aurora is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.</p>
+ <p class="disclaimer">Copyright 2014 <a href="http://www.apache.org/">Apache Software Foundation</a>. Licensed under the <a href="http://www.apache.org/licenses/">Apache License v2.0</a>. The <a href="https://www.flickr.com/photos/trondk/12706051375/">Aurora Borealis IX photo</a> displayed on the homepage is available under a <a href="https://creativecommons.org/licenses/by-nc-nd/2.0/">Creative Commons BY-NC-ND 2.0 license</a>. Apache, Apache Aurora, and the Apache feather logo are trademarks of The Apache Software Foundation.</p>
+ </div>
+ </div>
+ </div>
+ </body>
+</html>
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+<!DOCTYPE html>
+<html lang="en">
+ <head>
+ <meta charset="utf-8">
+ <meta name="viewport" content="width=device-width, initial-scale=1">
+ <title>Apache Aurora</title>
+ <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css">
+ <link href="/assets/css/main.css" rel="stylesheet">
+ <!-- Analytics -->
+ <script type="text/javascript">
+ var _gaq = _gaq || [];
+ _gaq.push(['_setAccount', 'UA-45879646-1']);
+ _gaq.push(['_setDomainName', 'apache.org']);
+ _gaq.push(['_trackPageview']);
+
+ (function() {
+ var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
+ ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
+ var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
+ })();
+ </script>
+ </head>
+ <body>
+
+ <div class="container-fluid section-header">
+ <div class="container">
+ <div class="nav nav-bar">
+ <a href="/"><img src="/assets/img/aurora_logo_white_bkg.svg" width="300" alt="Transparent Apache Aurora logo with dark background"/></a>
+ <ul class="nav navbar-nav navbar-right">
+ <li><a href="/documentation/latest/">Documentation</a></li>
+ <li><a href="/community/">Community</a></li>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/blog/">Blog</a></li>
+ </ul>
+ </div>
+ </div>
+</div>
+ <div class="container-fluid">
+ <div class="container content">
+ <h1 id="aurora-client-commands">Aurora Client Commands</h1>
+
+<p>The most up-to-date reference is in the client itself: use the
+<code>aurora help</code> subcommand (for example, <code>aurora help</code> or
+<code>aurora help create</code>) to find the latest information on parameters and
+functionality. Note that <code>aurora help open</code> does not work, due to underlying issues with
+reflection.</p>
+
+<ul>
+<li><a href="#introduction">Introduction</a></li>
+<li><a href="#cluster-configuration">Cluster Configuration</a></li>
+<li><a href="#job-keys">Job Keys</a></li>
+<li><a href="#modifying-aurora-client-commands">Modifying Aurora Client Commands</a></li>
+<li><a href="#regular-jobs">Regular Jobs</a>
+
+<ul>
+<li><a href="#creating-and-running-a-job">Creating and Running a Job</a></li>
+<li><a href="#running-a-command-on-a-running-job">Running a Command On a Running Job</a></li>
+<li><a href="#killing-a-job">Killing a Job</a></li>
+<li><a href="#updating-a-job">Updating a Job</a>
+
+<ul>
+<li><a href="#user-content-asynchronous-job-updates-beta">Asynchronous job updates (beta)</a></li>
+</ul></li>
+<li><a href="#renaming-a-job">Renaming a Job</a></li>
+<li><a href="#restarting-jobs">Restarting Jobs</a></li>
+</ul></li>
+<li><a href="#cron-jobs">Cron Jobs</a></li>
+<li><a href="#comparing-jobs">Comparing Jobs</a></li>
+<li><a href="#viewingexamining-jobs">Viewing/Examining Jobs</a>
+
+<ul>
+<li><a href="#listing-jobs">Listing Jobs</a></li>
+<li><a href="#inspecting-a-job">Inspecting a Job</a></li>
+<li><a href="#versions">Versions</a></li>
+<li><a href="#checking-your-quota">Checking Your Quota</a></li>
+<li><a href="#finding-a-job-on-web-ui">Finding a Job on Web UI</a></li>
+<li><a href="#getting-job-status">Getting Job Status</a></li>
+<li><a href="#opening-the-web-ui">Opening the Web UI</a></li>
+<li><a href="#sshing-to-a-specific-task-machine">SSHing to a Specific Task Machine</a></li>
+<li><a href="#templating-command-arguments">Templating Command Arguments</a></li>
+</ul></li>
+</ul>
+
+<h2 id="introduction">Introduction</h2>
+
+<p>Once you have written an <code>.aurora</code> configuration file that describes
+your Job and its parameters and functionality, you interact with Aurora
+using Aurora Client commands. This document describes all of these commands
+and how and when to use them. All Aurora Client commands start with
+<code>aurora</code>, followed by the name of the specific command and its
+arguments.</p>
+
+<p><em>Job keys</em> are a very common argument to Aurora commands, as well as the
+gateway to useful information about a Job. Before using Aurora, you
+should read the next section which describes them in detail. The section
+after that briefly describes how you can modify the behavior of certain
+Aurora Client commands, linking to a detailed document about how to do
+that.</p>
+
+<p>This is followed by the Regular Jobs section, which describes the basic
+Client commands for creating, running, and manipulating Aurora Jobs.
+After that are sections on Comparing Jobs and Viewing/Examining Jobs. In
+other words, various commands for getting information and metadata about
+Aurora Jobs.</p>
+
+<h2 id="cluster-configuration">Cluster Configuration</h2>
+
+<p>The client must be able to find a configuration file that specifies available clusters. This file
+declares shorthand names for clusters, which are in turn referenced by job configuration files
+and client commands.</p>
+
+<p>The client will load at most two configuration files, making both of their defined clusters
+available. The first is intended to be a system-installed cluster, using the path specified in
+the environment variable <code>AURORA_CONFIG_ROOT</code>, defaulting to <code>/etc/aurora/clusters.json</code> if the
+environment variable is not set. The second is a user-installed file, located at
+<code>~/.aurora/clusters.json</code>.</p>
+
+<p>A cluster configuration is formatted as JSON. The simplest cluster configuration is one that
+communicates with a single (non-leader-elected) scheduler. For example:</p>
+<pre class="highlight javascript"><span class="p">[{</span>
+ <span class="s2">"name"</span><span class="err">:</span> <span class="s2">"example"</span><span class="p">,</span>
+ <span class="s2">"scheduler_uri"</span><span class="err">:</span> <span class="s2">"localhost:55555"</span><span class="p">,</span>
+<span class="p">}]</span>
+</pre>
+<p>A configuration for a leader-elected scheduler would contain something like:</p>
+<pre class="highlight javascript"><span class="p">[{</span>
+ <span class="s2">"name"</span><span class="err">:</span> <span class="s2">"example"</span><span class="p">,</span>
+ <span class="s2">"zk"</span><span class="err">:</span> <span class="s2">"192.168.33.7"</span><span class="p">,</span>
+ <span class="s2">"scheduler_zk_path"</span><span class="err">:</span> <span class="s2">"/aurora/scheduler"</span>
+<span class="p">}]</span>
+</pre>
+<p>For more details on cluster configuration see the
+<a href="/documentation/latest/client-cluster-configuration/">Client Cluster Configuration</a> documentation.</p>
+
+<h2 id="job-keys">Job Keys</h2>
+
+<p>A job key is a unique system-wide identifier for an Aurora-managed
+Job, for example <code>cluster1/web-team/test/experiment204</code>. It is a 4-tuple
+consisting of, in order, <em>cluster</em>, <em>role</em>, <em>environment</em>, and
+<em>jobname</em>, separated by /s. Cluster is the name of an Aurora
+cluster. Role is the Unix service account under which the Job
+runs. Environment is a namespace component like <code>devel</code>, <code>test</code>,
+<code>prod</code>, or <code>stagingN.</code> Jobname is the Job’s name.</p>
+
+<p>The combination of all four values uniquely specifies the Job. If any
+one value is different from that of another job key, the two job keys
+refer to different Jobs. For example, job key
+<code>cluster1/tyg/prod/workhorse</code> is different from
+<code>cluster1/tyg/prod/workcamel</code> is different from
+<code>cluster2/tyg/prod/workhorse</code> is different from
+<code>cluster2/foo/prod/workhorse</code> is different from
+<code>cluster1/tyg/test/workhorse.</code></p>
+
+<p>Role names are user accounts existing on the slave machines. If you don’t know what accounts
+are available, contact your sysadmin.</p>
+
+<p>Environment names are namespaces; you can count on <code>prod</code>, <code>devel</code> and <code>test</code> existing.</p>
+
+<h2 id="modifying-aurora-client-commands">Modifying Aurora Client Commands</h2>
+
+<p>For certain Aurora Client commands, you can define hook methods that run
+either before or after an action that takes place during the command’s
+execution, as well as based on whether the action finished successfully or failed
+during execution. Basically, a hook is code that lets you extend the
+command’s actions. The hook executes on the client side, specifically on
+the machine executing Aurora commands.</p>
+
+<p>Hooks can be associated with these Aurora Client commands.</p>
+
+<ul>
+<li><code>cancel_update</code></li>
+<li><code>create</code></li>
+<li><code>kill</code></li>
+<li><code>restart</code></li>
+<li><code>update</code></li>
+</ul>
+
+<p>The process for writing and activating them is complex enough
+that we explain it in a devoted document, <a href="/documentation/latest/hooks/">Hooks for Aurora Client API</a>.</p>
+
+<h2 id="regular-jobs">Regular Jobs</h2>
+
+<p>This section covers Aurora commands related to running, killing,
+renaming, updating, and restarting a basic Aurora Job.</p>
+
+<h3 id="creating-and-running-a-job">Creating and Running a Job</h3>
+<pre class="highlight text">aurora create <job key> <configuration file>
+</pre>
+<p>Creates and then runs a Job with the specified job key based on a <code>.aurora</code> configuration file.
+The configuration file may also contain and activate hook definitions.</p>
+
+<p><code>create</code> can take four named parameters:</p>
+
+<ul>
+<li><code>-E NAME=VALUE</code> Bind a Thermos mustache variable name to a
+value. Multiple flags specify multiple values. Defaults to <code>[]</code>.</li>
+<li><code>-o, --open_browser</code> Open a browser window to the scheduler UI Job
+page after a job changing operation happens. When <code>False</code>, the Job
+URL prints on the console and the user has to copy/paste it
+manually. Defaults to <code>False</code>. Does not work when running in Vagrant.</li>
+<li><code>-j, --json</code> If specified, configuration argument is read as a
+string in JSON format. Defaults to False.</li>
+<li><code>--wait_until=STATE</code> Block the client until all the Tasks have
+transitioned into the requested state. Possible values are: <code>PENDING</code>,
+<code>RUNNING</code>, <code>FINISHED</code>. Default: <code>PENDING</code></li>
+</ul>
+
+<h3 id="running-a-command-on-a-running-job">Running a Command On a Running Job</h3>
+<pre class="highlight text">aurora run <job_key> <cmd>
+</pre>
+<p>Runs a shell command on all machines currently hosting shards of a
+single Job.</p>
+
+<p><code>run</code> supports the same command line wildcards used to populate a Job’s
+commands; i.e. anything in the <code>{{mesos.*}}</code> and <code>{{thermos.*}}</code>
+namespaces.</p>
+
+<p><code>run</code> can take three named parameters:</p>
+
+<ul>
+<li><code>-t NUM_THREADS</code>, <code>--threads=NUM_THREADS</code>The number of threads to
+use, defaulting to <code>1</code>.</li>
+<li><code>--user=SSH_USER</code> ssh as this user instead of the given role value.
+Defaults to None.</li>
+<li><code>-e, --executor_sandbox</code> Run the command in the executor sandbox
+instead of the Task sandbox. Defaults to False.</li>
+</ul>
+
+<h3 id="killing-a-job">Killing a Job</h3>
+<pre class="highlight text">aurora kill <job key> <configuration file>
+</pre>
+<p>Kills all Tasks associated with the specified Job, blocking until all
+are terminated. Defaults to killing all shards in the Job.</p>
+
+<p>The <code><configuration file></code> argument for <code>kill</code> is optional. Use it only
+if it contains hook definitions and activations that affect the
+kill command.</p>
+
+<p><code>kill</code> can take two named parameters:</p>
+
+<ul>
+<li><code>-o, --open_browser</code> Open a browser window to the scheduler UI Job
+page after a job changing operation happens. When <code>False</code>, the Job
+URL prints on the console and the user has to copy/paste it
+manually. Defaults to <code>False</code>. Does not work when running in Vagrant.</li>
+<li><code>--shards=SHARDS</code> A list of shard ids to act on. Can either be a
+comma-separated list (e.g. 0,1,2) or a range (e.g. 0-2) or any
+combination of the two (e.g. 0-2,5,7-9). Defaults to acting on all
+shards.</li>
+</ul>
+
+<h3 id="updating-a-job">Updating a Job</h3>
+<pre class="highlight text">aurora update [--shards=ids] <job key> <configuration file>
+aurora cancel_update <job key> <configuration file>
+</pre>
+<p>Given a running job, does a rolling update to reflect a new
+configuration version. Only updates Tasks in the Job with a changed
+configuration. You can further restrict the operated on Tasks by
+using <code>--shards</code> and specifying a comma-separated list of job shard ids.</p>
+
+<p>You may want to run <code>aurora diff</code> beforehand to validate which Tasks
+have different configurations.</p>
+
+<p>Updating jobs are locked to be sure the update finishes without
+disruption. If the update abnormally terminates, the lock may stay
+around and cause failure of subsequent update attempts.
+ <code>aurora cancel_update</code>unlocks the Job specified by
+its <code>job_key</code> argument. Be sure you don’t issue <code>cancel_update</code> when
+another user is working with the specified Job.</p>
+
+<p>The <code><configuration file></code> argument for <code>cancel_update</code> is optional. Use
+it only if it contains hook definitions and activations that affect the
+<code>cancel_update</code> command. The <code><configuration file></code> argument for
+<code>update</code> is required, but in addition to a new configuration it can be
+used to define and activate hooks for <code>update</code>.</p>
+
+<p><code>update</code> can take four named parameters:</p>
+
+<ul>
+<li><code>--shards=SHARDS</code> A list of shard ids to update. Can either be a
+comma-separated list (e.g. 0,1,2) or a range (e.g. 0-2) or any
+combination of the two (e.g. 0-2,5,7-9). If not set, all shards are
+acted on. Defaults to None.</li>
+<li><code>-E NAME=VALUE</code> Binds a Thermos mustache variable name to a value.
+Use multiple flags to specify multiple values. Defaults to <code>[]</code>.</li>
+<li><code>-j, --json</code> If specified, configuration is read in JSON format.
+Defaults to <code>False</code>.</li>
+<li><code>--updater_health_check_interval_seconds=HEALTH_CHECK_INTERVAL_SECONDS</code>
+Time interval between subsequent shard status checks. Defaults to <code>3</code>.</li>
+</ul>
+
+<h4 id="asynchronous-job-updates-(beta)">Asynchronous job updates (beta)</h4>
+
+<p>As of 0.6.0, Aurora will coordinate updates (and rollbacks) within the
+scheduler. Performing updates this way also allows the scheduler to display
+update progress and job update history in the browser.</p>
+
+<p>There are several sub-commands to manage job updates:</p>
+<pre class="highlight text">aurora2 beta-update start <job key> <configuration file
+aurora2 beta-update status <job key>
+aurora2 beta-update pause <job key>
+aurora2 beta-update resume <job key>
+aurora2 beta-update abort <job key>
+aurora2 beta-update list <cluster>
+</pre>
+<p>When you <code>start</code> a job update, the command will return once it has sent the
+instructions to the scheduler. At that point, you may view detailed
+progress for the update with the <code>status</code> subcommand, in addition to viewing
+graphical progress in the web browser. You may also get a full listing of
+in-progress updates in a cluster with <code>list</code>.</p>
+
+<p>Once an update has been started, you can <code>pause</code> to keep the update but halt
+progress. This can be useful for doing things like debug a partially-updated
+job to determine whether you would like to proceed. You can <code>resume</code> to
+proceed.</p>
+
+<p>You may <code>abort</code> a job update regardless of the state it is in. This will
+instruct the scheduler to completely abandon the job update and leave the job
+in the current (possibly partially-updated) state.</p>
+
+<h3 id="renaming-a-job">Renaming a Job</h3>
+
+<p>Renaming is a tricky operation as downstream clients must be informed of
+the new name. A conservative approach
+to renaming suitable for production services is:</p>
+
+<ol>
+<li> Modify the Aurora configuration file to change the role,
+environment, and/or name as appropriate to the standardized naming
+scheme.</li>
+<li><p>Check that only these naming components have changed
+with <code>aurora diff</code>.</p>
+<pre class="highlight text">aurora diff <job_key> <job_configuration>
+</pre></li>
+<li><p>Create the (identical) job at the new key. You may need to request a
+temporary quota increase.</p>
+<pre class="highlight text">aurora create <new_job_key> <job_configuration>
+</pre></li>
+<li><p>Migrate all clients over to the new job key. Update all links and
+dashboards. Ensure that both job keys run identical versions of the
+code while in this state.</p></li>
+<li><p>After verifying that all clients have successfully moved over, kill
+the old job.</p>
+<pre class="highlight text">aurora kill <old_job_key>
+</pre></li>
+<li><p>If you received a temporary quota increase, be sure to let the
+powers that be know you no longer need the additional capacity.</p></li>
+</ol>
+
+<h3 id="restarting-jobs">Restarting Jobs</h3>
+
+<p><code>restart</code> restarts all of a job key identified Job’s shards:</p>
+<pre class="highlight text">aurora restart <job_key> <configuration file>
+</pre>
+<p>Restarts are controlled on the client side, so aborting
+the <code>restart</code> command halts the restart operation.</p>
+
+<p><code>restart</code> does a rolling restart. You almost always want to do this, but
+not if all shards of a service are misbehaving and are
+completely dysfunctional. To not do a rolling restart, use
+the <code>-shards</code> option described below.</p>
+
+<p><strong>Note</strong>: <code>restart</code> only applies its command line arguments and does not
+use or is affected by <code>update.config</code>. Restarting
+does <strong><em>not</em></strong> involve a configuration change. To update the
+configuration, use <code>update.config</code>.</p>
+
+<p>The <code><configuration file></code> argument for restart is optional. Use it only
+if it contains hook definitions and activations that affect the
+<code>restart</code> command.</p>
+
+<p>In addition to the required job key argument, there are eight
+<code>restart</code> specific optional arguments:</p>
+
+<ul>
+<li><code>--updater_health_check_interval_seconds</code>: Defaults to <code>3</code>, the time
+interval between subsequent shard status checks.</li>
+<li><code>--shards=SHARDS</code>: Defaults to None, which restarts all shards.
+Otherwise, only the specified-by-id shards restart. They can be
+comma-separated <code>(0, 8, 9)</code>, a range <code>(3-5)</code> or a
+combination <code>(0, 3-5, 8, 9-11)</code>.</li>
+<li><code>--batch_size</code>: Defaults to <code>1</code>, the number of shards to be started
+in one iteration. So, for example, for value 3, it tries to restart
+the first three shards specified by <code>--shards</code> simultaneously, then
+the next three, and so on.</li>
+<li><code>--max_per_shard_failures=MAX_PER_SHARD_FAILURES</code>: Defaults to <code>0</code>,
+the maximum number of restarts per shard during restart. When
+exceeded, it increments the total failure count.</li>
+<li><code>--max_total_failures=MAX_TOTAL_FAILURES</code>: Defaults to <code>0</code>, the
+maximum total number of shard failures tolerated during restart.</li>
+<li><code>-o, --open_browser</code> Open a browser window to the scheduler UI Job
+page after a job changing operation happens. When <code>False</code>, the Job
+url prints on the console and the user has to copy/paste it
+manually. Defaults to <code>False</code>. Does not work when running in Vagrant.</li>
+<li><code>--restart_threshold</code>: Defaults to <code>60</code>, the maximum number of
+seconds before a shard must move into the <code>RUNNING</code> state before
+it’s considered a failure.</li>
+<li><code>--watch_secs</code>: Defaults to <code>45</code>, the minimum number of seconds a
+shard must remain in <code>RUNNING</code> state before considered a success.</li>
+</ul>
+
+<h2 id="cron-jobs">Cron Jobs</h2>
+
+<p>You will see various commands and options relating to cron jobs in
+<code>aurora -help</code> and similar. Ignore them, as they’re not yet implemented.
+You might be able to use them without causing an error, but nothing happens
+if you do.</p>
+
+<h2 id="comparing-jobs">Comparing Jobs</h2>
+<pre class="highlight text">aurora diff <job_key> config
+</pre>
+<p>Compares a job configuration against a running job. By default the diff
+is determined using <code>diff</code>, though you may choose an alternate
+ diff program by specifying the <code>DIFF_VIEWER</code> environment variable.</p>
+
+<p>There are two named parameters:</p>
+
+<ul>
+<li><code>-E NAME=VALUE</code> Bind a Thermos mustache variable name to a
+value. Multiple flags may be used to specify multiple values.
+Defaults to <code>[]</code>.</li>
+<li><code>-j, --json</code> Read the configuration argument in JSON format.
+Defaults to <code>False</code>.</li>
+</ul>
+
+<h2 id="viewing/examining-jobs">Viewing/Examining Jobs</h2>
+
+<p>Above we discussed creating, killing, and updating Jobs. Here we discuss
+how to view and examine Jobs.</p>
+
+<h3 id="listing-jobs">Listing Jobs</h3>
+<pre class="highlight text">aurora list_jobs
+Usage: `aurora list_jobs cluster/role
+</pre>
+<p>Lists all Jobs registered with the Aurora scheduler in the named cluster for the named role.</p>
+
+<p>It has two named parameters:</p>
+
+<ul>
+<li><code>--pretty</code>: Displays job information in prettyprinted format.
+Defaults to <code>False</code>.</li>
+<li><code>-c</code>, <code>--show-cron</code>: Shows cron schedule for jobs. Defaults to
+<code>False</code>. Do not use, as it’s not yet implemented.</li>
+</ul>
+
+<h3 id="inspecting-a-job">Inspecting a Job</h3>
+<pre class="highlight text">aurora inspect <job_key> config
+</pre>
+<p><code>inspect</code> verifies that its specified job can be parsed from a
+configuration file, and displays the parsed configuration. It has four
+named parameters:</p>
+
+<ul>
+<li><code>--local</code>: Inspect the configuration that the <code>spawn</code> command would
+create, defaulting to <code>False</code>.</li>
+<li><code>--raw</code>: Shows the raw configuration. Defaults to <code>False</code>.</li>
+<li><code>-j</code>, <code>--json</code>: If specified, configuration is read in JSON format.
+Defaults to <code>False</code>.</li>
+<li><code>-E NAME=VALUE</code>: Bind a Thermos Mustache variable name to a value.
+You can use multiple flags to specify multiple values. Defaults
+to <code>[]</code></li>
+</ul>
+
+<h3 id="versions">Versions</h3>
+<pre class="highlight text">aurora version
+</pre>
+<p>Lists client build information and what Aurora API version it supports.</p>
+
+<h3 id="checking-your-quota">Checking Your Quota</h3>
+<pre class="highlight text">aurora get_quota --cluster=CLUSTER role
+</pre>
+<p>Prints the production quota allocated to the role’s value at the given
+cluster.</p>
+
+<h3 id="finding-a-job-on-web-ui">Finding a Job on Web UI</h3>
+
+<p>When you create a job, part of the output response contains a URL that goes
+to the job’s scheduler UI page. For example:</p>
+<pre class="highlight text">vagrant@precise64:~$ aurora create devcluster/www-data/prod/hello /vagrant/examples/jobs/hello_world.aurora
+INFO] Creating job hello
+INFO] Response from scheduler: OK (message: 1 new tasks pending for job www-data/prod/hello)
+INFO] Job url: http://precise64:8081/scheduler/www-data/prod/hello
+</pre>
+<p>You can go to the scheduler UI page for this job via <code>http://precise64:8081/scheduler/www-data/prod/hello</code>
+You can go to the overall scheduler UI page by going to the part of that URL that ends at <code>scheduler</code>; <code>http://precise64:8081/scheduler</code></p>
+
+<p>Once you click through to a role page, you see Jobs arranged
+separately by pending jobs, active jobs and finished jobs.
+Jobs are arranged by role, typically a service account for
+production jobs and user accounts for test or development jobs.</p>
+
+<h3 id="getting-job-status">Getting Job Status</h3>
+<pre class="highlight text">aurora status <job_key>
+</pre>
+<p>Returns the status of recent tasks associated with the
+<code>job_key</code> specified Job in its supplied cluster. Typically this includes
+a mix of active tasks (running or assigned) and inactive tasks
+(successful, failed, and lost.)</p>
+
+<h3 id="opening-the-web-ui">Opening the Web UI</h3>
+
+<p>Use the Job’s web UI scheduler URL or the <code>aurora status</code> command to find out on which
+machines individual tasks are scheduled. You can open the web UI via the
+<code>open</code> command line command if invoked from your machine:</p>
+<pre class="highlight text">aurora open [<cluster>[/<role>[/<env>/<job_name>]]]
+</pre>
+<p>If only the cluster is specified, it goes directly to that cluster’s
+scheduler main page. If the role is specified, it goes to the top-level
+role page. If the full job key is specified, it goes directly to the job
+page where you can inspect individual tasks.</p>
+
+<h3 id="sshing-to-a-specific-task-machine">SSHing to a Specific Task Machine</h3>
+<pre class="highlight text">aurora ssh <job_key> <shard number>
+</pre>
+<p>You can have the Aurora client ssh directly to the machine that has been
+assigned a particular Job/shard number. This may be useful for quickly
+diagnosing issues such as performance issues or abnormal behavior on a
+particular machine.</p>
+
+<p>It can take three named parameters:</p>
+
+<ul>
+<li><code>-e</code>, <code>--executor_sandbox</code>: Run <code>ssh</code> in the executor sandbox
+instead of the task sandbox. Defaults to <code>False</code>.</li>
+<li><code>--user=SSH_USER</code>: <code>ssh</code> as the given user instead of as the role in
+the <code>job_key</code> argument. Defaults to none.</li>
+<li><code>-L PORT:NAME</code>: Add tunnel from local port <code>PORT</code> to the remote
+named port <code>NAME</code>. Defaults to <code>[]</code>.</li>
+</ul>
+
+<h3 id="templating-command-arguments">Templating Command Arguments</h3>
+<pre class="highlight text">aurora run [-e] [-t THREADS] <job_key> -- <<command-line>>
+</pre>
+<p>Given a job specification, run the supplied command on all hosts and
+return the output. You may use the standard Mustache templating rules:</p>
+
+<ul>
+<li><code>{{thermos.ports[name]}}</code> substitutes the specific named port of the
+task assigned to this machine</li>
+<li><code>{{mesos.instance}}</code> substitutes the shard id of the job’s task
+assigned to this machine</li>
+<li><code>{{thermos.task_id}}</code> substitutes the task id of the job’s task
+assigned to this machine</li>
+</ul>
+
+<p>For example, the following type of pattern can be a powerful diagnostic
+tool:</p>
+<pre class="highlight text">aurora run -t5 cluster1/tyg/devel/seizure -- \
+ 'curl -s -m1 localhost:{{thermos.ports[http]}}/vars | grep uptime'
+</pre>
+<p>By default, the command runs in the Task’s sandbox. The <code>-e</code> option can
+run the command in the executor’s sandbox. This is mostly useful for
+Aurora administrators.</p>
+
+<p>You can parallelize the runs by using the <code>-t</code> option.</p>
+
+ </div>
+ </div>
+
+ <div class="container-fluid section-footer buffer">
+ <div class="container">
+ <div class="row">
+ <div class="col-md-2 col-md-offset-1"><h3>Quick Links</h3>
+ <ul>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/community/">Mailing Lists</a></li>
+ <li><a href="http://issues.apache.org/jira/browse/AURORA">Issue Tracking</a></li>
+ <li><a href="/documentation/latest/contributing/">How To Contribute</a></li>
+ </ul>
+ </div>
+ <div class="col-md-2"><h3>The ASF</h3>
+ <ul>
+ <li><a href="http://www.apache.org/licenses/">License</a></li>
+ <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+ <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
+ <li><a href="http://www.apache.org/security/">Security</a></li>
+ </ul>
+ </div>
+ <div class="col-md-6">
+ <p class="disclaimer">Apache Aurora is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.</p>
+ <p class="disclaimer">Copyright 2014 <a href="http://www.apache.org/">Apache Software Foundation</a>. Licensed under the <a href="http://www.apache.org/licenses/">Apache License v2.0</a>. The <a href="https://www.flickr.com/photos/trondk/12706051375/">Aurora Borealis IX photo</a> displayed on the homepage is available under a <a href="https://creativecommons.org/licenses/by-nc-nd/2.0/">Creative Commons BY-NC-ND 2.0 license</a>. Apache, Apache Aurora, and the Apache feather logo are trademarks of The Apache Software Foundation.</p>
+ </div>
+ </div>
+ </div>
+ </body>
+</html>
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+ })();
+ </script>
+ </head>
+ <body>
+
+ <div class="container-fluid section-header">
+ <div class="container">
+ <div class="nav nav-bar">
+ <a href="/"><img src="/assets/img/aurora_logo_white_bkg.svg" width="300" alt="Transparent Apache Aurora logo with dark background"/></a>
+ <ul class="nav navbar-nav navbar-right">
+ <li><a href="/documentation/latest/">Documentation</a></li>
+ <li><a href="/community/">Community</a></li>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/blog/">Blog</a></li>
+ </ul>
+ </div>
+ </div>
+</div>
+ <div class="container-fluid">
+ <div class="container content">
+ <h1 id="deploying-the-aurora-scheduler">Deploying the Aurora Scheduler</h1>
+
+<p>When setting up your cluster, you will install the scheduler on a small number (usually 3 or 5) of
+machines. This guide helps you get the scheduler set up and troubleshoot some common hurdles.</p>
+
+<ul>
+<li><a href="#installing-aurora">Installing Aurora</a>
+
+<ul>
+<li><a href="#creating-the-distribution-zip-file-optional">Creating the Distribution .zip File (Optional)</a></li>
+<li><a href="#installing-aurora-1">Installing Aurora</a></li>
+</ul></li>
+<li><a href="#configuring-aurora">Configuring Aurora</a>
+
+<ul>
+<li><a href="#a-note-on-configuration">A Note on Configuration</a></li>
+<li><a href="#replicated-log-configuration">Replicated Log Configuration</a></li>
+<li><a href="#initializing-the-replicated-log">Initializing the Replicated Log</a></li>
+<li><a href="#storage-performance-considerations">Storage Performance Considerations</a></li>
+<li><a href="#network-considerations">Network considerations</a></li>
+</ul></li>
+<li><a href="#running-aurora">Running Aurora</a>
+
+<ul>
+<li><a href="#maintaining-an-aurora-installation">Maintaining an Aurora Installation</a></li>
+<li><a href="#monitoring">Monitoring</a></li>
+<li><a href="#running-stateful-services">Running stateful services</a></li>
+<li><a href="#dedicated-attribute">Dedicated attribute</a>
+
+<ul>
+<li><a href="#syntax">Syntax</a></li>
+<li><a href="#example">Example</a></li>
+</ul></li>
+</ul></li>
+<li><a href="#common-problems">Common problems</a>
+
+<ul>
+<li><a href="#replicated-log-not-initialized">Replicated log not initialized</a></li>
+<li><a href="#symptoms">Symptoms</a></li>
+<li><a href="#solution">Solution</a></li>
+<li><a href="#scheduler-not-registered">Scheduler not registered</a></li>
+<li><a href="#symptoms-1">Symptoms</a></li>
+<li><a href="#solution-1">Solution</a></li>
+<li><a href="#tasks-are-stuck-in-pending-forever">Tasks are stuck in PENDING forever</a></li>
+<li><a href="#symptoms-2">Symptoms</a></li>
+<li><a href="#solution-2">Solution</a></li>
+</ul></li>
+</ul>
+
+<h2 id="installing-aurora">Installing Aurora</h2>
+
+<p>The Aurora scheduler is a standalone Java server. As part of the build process it creates a bundle
+of all its dependencies, with the notable exceptions of the JVM and libmesos. Each target server
+should have a JVM (Java 7 or higher) and libmesos (0.20.1) installed.</p>
+
+<h3 id="creating-the-distribution-.zip-file-(optional)">Creating the Distribution .zip File (Optional)</h3>
+
+<p>To create a distribution for installation you will need build tools installed. On Ubuntu this can be
+done with <code>sudo apt-get install build-essential default-jdk</code>.</p>
+<pre class="highlight text">git clone http://git-wip-us.apache.org/repos/asf/incubator-aurora.git
+cd incubator-aurora
+./gradlew distZip
+</pre>
+<p>Copy the generated <code>dist/distributions/aurora-scheduler-*.zip</code> to each node that will run a scheduler.</p>
+
+<h3 id="installing-aurora">Installing Aurora</h3>
+
+<p>Extract the aurora-scheduler zip file. The example configurations assume it is extracted to
+<code>/usr/local/aurora-scheduler</code>.</p>
+<pre class="highlight text">sudo unzip dist/distributions/aurora-scheduler-*.zip -d /usr/local
+sudo ln -nfs "$(ls -dt /usr/local/aurora-scheduler-* | head -1)" /usr/local/aurora-scheduler
+</pre>
+<h2 id="configuring-aurora">Configuring Aurora</h2>
+
+<h3 id="a-note-on-configuration">A Note on Configuration</h3>
+
+<p>Like Mesos, Aurora uses command-line flags for runtime configuration. As such the Aurora
+“configuration file” is typically a <code>scheduler.sh</code> shell script of the form.</p>
+<pre class="highlight shell"><span class="c">#!/bin/bash</span>
+<span class="nv">AURORA_HOME</span><span class="o">=</span>/usr/local/aurora-scheduler
+
+<span class="c"># Flags controlling the JVM.</span>
+<span class="nv">JAVA_OPTS</span><span class="o">=(</span>
+ -Xmx2g
+ -Xms2g
+ <span class="c"># GC tuning, etc.</span>
+<span class="o">)</span>
+
+<span class="c"># Flags controlling the scheduler.</span>
+<span class="nv">AURORA_FLAGS</span><span class="o">=(</span>
+ -http_port<span class="o">=</span>8081
+ <span class="c"># Log configuration, etc.</span>
+<span class="o">)</span>
+
+<span class="c"># Environment variables controlling libmesos</span>
+<span class="nb">export </span><span class="nv">JAVA_HOME</span><span class="o">=</span>...
+<span class="nb">export </span><span class="nv">GLOG_v</span><span class="o">=</span>1
+<span class="nb">export </span><span class="nv">LIBPROCESS_PORT</span><span class="o">=</span>8083
+
+<span class="nv">JAVA_OPTS</span><span class="o">=</span><span class="s2">"</span><span class="k">${</span><span class="nv">JAVA_OPTS</span><span class="p">[*]</span><span class="k">}</span><span class="s2">"</span> <span class="nb">exec</span> <span class="s2">"</span><span class="nv">$AURORA_HOME</span><span class="s2">/bin/aurora-scheduler"</span> <span class="s2">"</span><span class="k">${</span><span class="nv">AURORA_FLAGS</span><span class="p">[@]</span><span class="k">}</span><span class="s2">"</span>
+</pre>
+<p>That way Aurora’s current flags are visible in <code>ps</code> and in the <code>/vars</code> admin endpoint.</p>
+
+<p>Examples are available under <code>examples/scheduler/</code>. For a list of available Aurora flags and their
+documentation run</p>
+<pre class="highlight text">/usr/local/aurora-scheduler/bin/aurora-scheduler -help
+</pre>
+<h3 id="replicated-log-configuration">Replicated Log Configuration</h3>
+
+<p>All Aurora state is persisted to a replicated log. This includes all jobs Aurora is running
+including where in the cluster they are being run and the configuration for running them, as
+well as other information such as metadata needed to reconnect to the Mesos master, resource
+quotas, and any other locks in place.</p>
+
+<p>Aurora schedulers use ZooKeeper to discover log replicas and elect a leader. Only one scheduler is
+leader at a given time - the other schedulers follow log writes and prepare to take over as leader
+but do not communicate with the Mesos master. Either 3 or 5 schedulers are recommended in a
+production deployment depending on failure tolerance and they must have persistent storage.</p>
+
+<p>In a cluster with <code>N</code> schedulers, the flag <code>-native_log_quorum_size</code> should be set to
+<code>floor(N/2) + 1</code>. So in a cluster with 1 scheduler it should be set to <code>1</code>, in a cluster with 3 it
+should be set to <code>2</code>, and in a cluster of 5 it should be set to <code>3</code>.</p>
+
+<table><thead>
+<tr>
+<th>Number of schedulers (N)</th>
+<th><code>-native_log_quorum_size</code> setting (<code>floor(N/2) + 1</code>)</th>
+</tr>
+</thead><tbody>
+<tr>
+<td>1</td>
+<td>1</td>
+</tr>
+<tr>
+<td>3</td>
+<td>2</td>
+</tr>
+<tr>
+<td>5</td>
+<td>3</td>
+</tr>
+<tr>
+<td>7</td>
+<td>4</td>
+</tr>
+</tbody></table>
+
+<p><em>Incorrectly setting this flag will cause data corruption to occur!</em></p>
+
+<p>See <a href="storage-config.md#scheduler-storage-configuration-flags">this document</a> for more replicated
+log and storage configuration options.</p>
+
+<h2 id="initializing-the-replicated-log">Initializing the Replicated Log</h2>
+
+<p>Before you start Aurora you will also need to initialize the log on the first master.</p>
+<pre class="highlight text">mesos-log initialize --path="$AURORA_HOME/scheduler/db"
+</pre>
+<p>Failing to do this will result the following message when you try to start the scheduler.</p>
+<pre class="highlight text">Replica in EMPTY status received a broadcasted recover request
+</pre>
+<h3 id="storage-performance-considerations">Storage Performance Considerations</h3>
+
+<p>See <a href="/documentation/latest/scheduler-storage/">this document</a> for scheduler storage performance considerations.</p>
+
+<h3 id="network-considerations">Network considerations</h3>
+
+<p>The Aurora scheduler listens on 2 ports - an HTTP port used for client RPCs and a web UI,
+and a libprocess (HTTP+Protobuf) port used to communicate with the Mesos master and for the log
+replication protocol. These can be left unconfigured (the scheduler publishes all selected ports
+to ZooKeeper) or explicitly set in the startup script as follows:</p>
+<pre class="highlight text"># ...
+AURORA_FLAGS=(
+ # ...
+ -http_port=8081
+ # ...
+)
+# ...
+export LIBPROCESS_PORT=8083
+# ...
+</pre>
+<h2 id="running-aurora">Running Aurora</h2>
+
+<p>Configure a supervisor like <a href="http://mmonit.com/monit/">Monit</a> or
+<a href="http://supervisord.org/">supervisord</a> to run the created <code>scheduler.sh</code> file and restart it
+whenever it fails. Aurora expects to be restarted by an external process when it fails. Aurora
+supports an active health checking protocol on its admin HTTP interface - if a <code>GET /health</code> times
+out or returns anything other than <code>200 OK</code> the scheduler process is unhealthy and should be
+restarted.</p>
+
+<p>For example, monit can be configured with</p>
+<pre class="highlight text">if failed port 8081 send "GET /health HTTP/1.0\r\n" expect "OK\n" with timeout 2 seconds for 10 cycles then restart
+</pre>
+<p>assuming you set <code>-http_port=8081</code>.</p>
+
+<h3 id="maintaining-an-aurora-installation">Maintaining an Aurora Installation</h3>
+
+<h3 id="monitoring">Monitoring</h3>
+
+<p>Please see our dedicated <a href="/documentation/latest/monitoring/">monitoring guide</a> for in-depth discussion on monitoring.</p>
+
+<h3 id="running-stateful-services">Running stateful services</h3>
+
+<p>Aurora is best suited to run stateless applications, but it also accommodates for stateful services
+like databases, or services that otherwise need to always run on the same machines.</p>
+
+<h4 id="dedicated-attribute">Dedicated attribute</h4>
+
+<p>The Mesos slave has the <code>--attributes</code> command line argument which can be used to mark a slave with
+static attributes (not to be confused with <code>--resources</code>, which are dynamic and accounted).</p>
+
+<p>Aurora makes these attributes available for matching with scheduling
+<a href="configuration-reference.md#specifying-scheduling-constraints">constraints</a>. Most of these
+constraints are arbitrary and available for custom use. There is one exception, though: the
+<code>dedicated</code> attribute. Aurora treats this specially, and only allows matching jobs to run on these
+machines, and will only schedule matching jobs on these machines.</p>
+
+<h5 id="syntax">Syntax</h5>
+
+<p>The dedicated attribute has semantic meaning. The format is <code>$role(/.*)?</code>. When a job is created,
+the scheduler requires that the <code>$role</code> component matches the <code>role</code> field in the job
+configuration, and will reject the job creation otherwise. The remainder of the attribute is
+free-form. We’ve developed the idiom of formatting this attribute as <code>$role/$job</code>, but do not
+enforce this.</p>
+
+<h5 id="example">Example</h5>
+
+<p>Consider the following slave command line:</p>
+<pre class="highlight text">mesos-slave --attributes="host:$HOST;rack:$RACK;dedicated:db_team/redis" ...
+</pre>
+<p>And this job configuration:</p>
+<pre class="highlight text">Service(
+ name = 'redis',
+ role = 'db_team',
+ constraints = {
+ 'dedicated': 'db_team/redis'
+ }
+ ...
+)
+</pre>
+<p>The job configuration is indicating that it should only be scheduled on slaves with the attribute
+<code>dedicated:dba_team/redis</code>. Additionally, Aurora will prevent any tasks that do <em>not</em> have that
+constraint from running on those slaves.</p>
+
+<h2 id="common-problems">Common problems</h2>
+
+<p>So you’ve started your first cluster and are running into some issues? We’ve collected some common
+stumbling blocks and solutions here to help get you moving.</p>
+
+<h3 id="replicated-log-not-initialized">Replicated log not initialized</h3>
+
+<h4 id="symptoms">Symptoms</h4>
+
+<ul>
+<li>Scheduler RPCs and web interface claim <code>Storage is not READY</code></li>
+<li>Scheduler log repeatedly prints messages like</li>
+</ul>
+<pre class="highlight text"> I1016 16:12:27.234133 26081 replica.cpp:638] Replica in EMPTY status
+ received a broadcasted recover request
+ I1016 16:12:27.234256 26084 recover.cpp:188] Received a recover response
+ from a replica in EMPTY status
+</pre>
+<h4 id="solution">Solution</h4>
+
+<p>When you create a new cluster, you need to inform a quorum of schedulers that they are safe to
+consider their database to be empty by <a href="#initializing-the-replicated-log">initializing</a> the
+replicated log. This is done to prevent the scheduler from modifying the cluster state in the event
+of multiple simultaneous disk failures or, more likely, misconfiguration of the replicated log path.</p>
+
+<h3 id="scheduler-not-registered">Scheduler not registered</h3>
+
+<h4 id="symptoms">Symptoms</h4>
+
+<p>Scheduler log contains</p>
+<pre class="highlight text">Framework has not been registered within the tolerated delay.
+</pre>
+<h4 id="solution">Solution</h4>
+
+<p>Double-check that the scheduler is configured correctly to reach the master. If you are registering
+the master in ZooKeeper, make sure command line argument to the master:</p>
+<pre class="highlight text">--zk=zk://$ZK_HOST:2181/mesos/master
+</pre>
+<p>is the same as the one on the scheduler:</p>
+<pre class="highlight text">-mesos_master_address=zk://$ZK_HOST:2181/mesos/master
+</pre>
+<h3 id="tasks-are-stuck-in-pending-forever">Tasks are stuck in <code>PENDING</code> forever</h3>
+
+<h4 id="symptoms">Symptoms</h4>
+
+<p>The scheduler is registered, and (receiving offers](docs/monitoring.md#scheduler<em>resource</em>offers),
+but tasks are perpetually shown as <code>PENDING - Constraint not satisfied: host</code>.</p>
+
+<h4 id="solution">Solution</h4>
+
+<p>Check that your slaves are configured with <code>host</code> and <code>rack</code> attributes. Aurora requires that
+slaves are tagged with these two common failure domains to ensure that it can safely place tasks
+such that jobs are resilient to failure.</p>
+
+<p>See our <a href="examples/vagrant/upstart/mesos-slave.conf">vagrant example</a> for details.</p>
+
+ </div>
+ </div>
+
+ <div class="container-fluid section-footer buffer">
+ <div class="container">
+ <div class="row">
+ <div class="col-md-2 col-md-offset-1"><h3>Quick Links</h3>
+ <ul>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/community/">Mailing Lists</a></li>
+ <li><a href="http://issues.apache.org/jira/browse/AURORA">Issue Tracking</a></li>
+ <li><a href="/documentation/latest/contributing/">How To Contribute</a></li>
+ </ul>
+ </div>
+ <div class="col-md-2"><h3>The ASF</h3>
+ <ul>
+ <li><a href="http://www.apache.org/licenses/">License</a></li>
+ <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+ <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
+ <li><a href="http://www.apache.org/security/">Security</a></li>
+ </ul>
+ </div>
+ <div class="col-md-6">
+ <p class="disclaimer">Apache Aurora is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.</p>
+ <p class="disclaimer">Copyright 2014 <a href="http://www.apache.org/">Apache Software Foundation</a>. Licensed under the <a href="http://www.apache.org/licenses/">Apache License v2.0</a>. The <a href="https://www.flickr.com/photos/trondk/12706051375/">Aurora Borealis IX photo</a> displayed on the homepage is available under a <a href="https://creativecommons.org/licenses/by-nc-nd/2.0/">Creative Commons BY-NC-ND 2.0 license</a>. Apache, Apache Aurora, and the Apache feather logo are trademarks of The Apache Software Foundation.</p>
+ </div>
+ </div>
+ </div>
+ </body>
+</html>
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+<!DOCTYPE html>
+<html lang="en">
+ <head>
+ <meta charset="utf-8">
+ <meta name="viewport" content="width=device-width, initial-scale=1">
+ <title>Apache Aurora</title>
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+ <link href="/assets/css/main.css" rel="stylesheet">
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+ })();
+ </script>
+ </head>
+ <body>
+
+ <div class="container-fluid section-header">
+ <div class="container">
+ <div class="nav nav-bar">
+ <a href="/"><img src="/assets/img/aurora_logo_white_bkg.svg" width="300" alt="Transparent Apache Aurora logo with dark background"/></a>
+ <ul class="nav navbar-nav navbar-right">
+ <li><a href="/documentation/latest/">Documentation</a></li>
+ <li><a href="/community/">Community</a></li>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/blog/">Blog</a></li>
+ </ul>
+ </div>
+ </div>
+</div>
+ <div class="container-fluid">
+ <div class="container content">
+ <h1 id="getting-started">Getting Started</h1>
+
+<p>Aurora consists of four main pieces: the scheduler (which finds resources in the cluster that can be used to run a job), the executor (which uses the resources assigned by the scheduler to run a job), the command-line client, and the web-ui. For information about working on the scheduler or the webUI, see the file “developing-aurora-scheduler.md” in this directory.</p>
+
+<p>If you want to work on the command-line client, this is the place for you!</p>
+
+<p>The client is written in Python, and unlike the server side of things, we build the client using the Pants build tool, instead of Gradle. Pants is a tool that was built by twitter for handling builds of large collaborative systems. You can see a detailed explanation of
+pants <a href="http://pantsbuild.github.io/python-readme.html">here</a>.</p>
+
+<p>To build the client executable, run the following in a command-shell:</p>
+<pre class="highlight text">$ ./pants src/main/python/apache/aurora/client/cli:aurora2
+</pre>
+<p>This will produce a python executable <em>pex</em> file in <code>dist/aurora2.pex</code>. Pex files
+are fully self-contained executables: just copy the pex file into your path, and you’ll be able to run it. For example, for a typical installation:</p>
+<pre class="highlight text">$ cp dist/aurora2.pex /usr/local/bin/aurora
+</pre>
+<p>To run all of the client tests:</p>
+<pre class="highlight text">$ ./pasts src/test/python/apache/aurora/client/:all
+</pre>
+<h1 id="client-configuration">Client Configuration</h1>
+
+<p>The client uses a configuration file that specifies available clusters. More information about the
+contents of this file can be found in the
+<a href="/documentation/latest/client-cluster-configuration/">Client Cluster Configuration</a> documentation. Information about
+how the client locates this file can be found in the
+<a href="client-commands.md#cluster-configuration">Client Commands</a> documentation.</p>
+
+<h1 id="client-versions">Client Versions</h1>
+
+<p>There are currently two versions of the aurora client, imaginatively known as v1 and v2. All new development is done entirely in v2, but we continue to support and fix bugs in v1, until we get to the point where v2 is feature-complete and tested, and aurora users have had some time at adapt and switch their processes to use v2.</p>
+
+<p>Both versions are built on the same underlying API code.</p>
+
+<p>Client v1 was implemented using twitter.common.app. The command-line processing code for v1 can be found in <code>src/main/python/apache/aurora/client/commands</code> and
+<code>src/main/python/apache/aurora/client/bin</code>.</p>
+
+<p>Client v2 was implemented using its own noun/verb framework. The client v2 code can be found in <code>src/main/python/apache/aurora/client/cli</code>, and the noun/verb framework can be
+found in the <code>__init__.py</code> file in that directory.</p>
+
+<h1 id="building-and-testing-the-client">Building and Testing the Client</h1>
+
+<p>Building and testing the client code are both done using Pants. The relevant targets to know about are:</p>
+
+<ul>
+<li>Build a client v2 executable: <code>./pants src/main/python/apache/aurora/client/cli:aurora2</code></li>
+<li>Test client v2 code: <code>./pants ./pants src/test/python/apache/aurora/client/cli:all</code></li>
+<li>Build a client v1 executable: <code>./pants src/main/python/apache/aurora/client/bin:aurora_client</code></li>
+<li>Test client v1 code: <code>./pants src/main/python/apache/aurora/client/commands:all</code></li>
+<li>Test all client code: <code>./pants src/main/python/apache/aurora/client:all</code></li>
+</ul>
+
+<h1 id="overview-of-the-client-architecture">Overview of the Client Architecture</h1>
+
+<p>The client is built on a stacked architecture:</p>
+
+<ol>
+<li><p>At the lowest level, we have a thrift RPC API interface
+to the aurora scheduler. The interface is declared in thrift, in the file
+<code>src/main/thrift/org/apache/aurora/gen/api.thrift</code>.</p>
+
+<ol>
+<li>On top of the primitive API, we have a client API. The client API
+takes the primitive operations provided by the scheduler, and uses them
+to implement client-side behaviors. For example, when you update a job,
+on the scheduler, that’s done by a sequence of operations. The sequence is implemented
+by the client API <code>update</code> method, which does the following using the thrift API:
+
+<ul>
+<li>fetching the state of task instances in the mesos cluster, and figuring out which need
+to be updated;</li>
+<li>For each task to be updated:
+
+<ul>
+<li>killing the old version;</li>
+<li>starting the new version;</li>
+<li>monitoring the new version to ensure that the update succeeded.</li>
+</ul></li>
+</ul></li>
+<li>On top of the API, we have the command-line client itself. The core client, at this level,
+consists of the interface to the command-line which the user will use to interact with aurora.
+The client v2 code is found in <code>src/python/apache/aurora/client/cli</code>. In the <code>cli</code> directory,
+the rough structure is as follows:
+
+<ul>
+<li><code>__init__.py</code> contains the noun/verb command-line processing framework used by client v2.</li>
+<li><code>jobs.py</code> contains the implementation of the core <code>job</code> noun, and all of its operations.</li>
+<li><code>bridge.py</code> contains the implementation of a component that allows us to ship a
+combined client that runs both v1 and v2 client commands during the transition period.</li>
+<li><code>client.py</code> contains the code that binds the client v2 nouns and verbs into an executable.</li>
+</ul></li>
+</ol></li>
+</ol>
+
+<h1 id="running/debugging-the-client">Running/Debugging the Client</h1>
+
+<p>For manually testing client changes against a cluster, we use vagrant. To start a virtual cluster,
+you need to install a working vagrant environment, and then run “vagrant up” for the root of
+the aurora workspace. This will create a vagrant host named “devcluster”, with a mesos master,
+a set of mesos slaves, and an aurora scheduler.</p>
+
+<p>To use the devcluster, you need to bring it up by running <code>vagrant up</code>, and then connect to the vagrant host using <code>vagrant ssh</code>. This will open a bash session on the virtual machine hosting the devcluster. In the home directory, there are two key paths to know about:</p>
+
+<ul>
+<li><code>~/aurora</code>: this is a copy of the git workspace in which you launched the vagrant cluster.
+ To test client changes, you’ll use this copy.</li>
+<li><code>/vagrant</code>: this is a mounted filesystem that’s a direct image of your git workspace.
+ This isn’t a copy - it is your git workspace. Editing files on your host machine will
+ be immediately visible here, because they are the same files.</li>
+</ul>
+
+<p>Whenever the scheduler is modified, to update your vagrant environment to use the new scheduler,
+you’ll need to re-initialize your vagrant images. To do this, you need to run two commands:</p>
+
+<ul>
+<li><code>vagrant destroy</code>: this will delete the old devcluster image.</li>
+<li><code>vagrant up</code>: this creates a fresh devcluster image based on the current state of your workspace.</li>
+</ul>
+
+<p>You should try to minimize rebuilding vagrant images; it’s not horribly slow, but it does take a while.</p>
+
+<p>To test client changes:</p>
+
+<ul>
+<li>Make a change in your local workspace, and commit it.</li>
+<li><code>vagrant ssh</code> into the devcluster.</li>
+<li><code>cd aurora</code></li>
+<li>Pull your changes into the vagrant copy: <code>git pull /vagrant *branchname*</code>.</li>
+<li>Build the modified client using pants.</li>
+<li>Run your command using <code>aurora2</code>. (You don’t need to do any install; the aurora2 command
+ is a symbolic link to the executable generated by pants.)</li>
+</ul>
+
+ </div>
+ </div>
+
+ <div class="container-fluid section-footer buffer">
+ <div class="container">
+ <div class="row">
+ <div class="col-md-2 col-md-offset-1"><h3>Quick Links</h3>
+ <ul>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/community/">Mailing Lists</a></li>
+ <li><a href="http://issues.apache.org/jira/browse/AURORA">Issue Tracking</a></li>
+ <li><a href="/documentation/latest/contributing/">How To Contribute</a></li>
+ </ul>
+ </div>
+ <div class="col-md-2"><h3>The ASF</h3>
+ <ul>
+ <li><a href="http://www.apache.org/licenses/">License</a></li>
+ <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+ <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
+ <li><a href="http://www.apache.org/security/">Security</a></li>
+ </ul>
+ </div>
+ <div class="col-md-6">
+ <p class="disclaimer">Apache Aurora is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.</p>
+ <p class="disclaimer">Copyright 2014 <a href="http://www.apache.org/">Apache Software Foundation</a>. Licensed under the <a href="http://www.apache.org/licenses/">Apache License v2.0</a>. The <a href="https://www.flickr.com/photos/trondk/12706051375/">Aurora Borealis IX photo</a> displayed on the homepage is available under a <a href="https://creativecommons.org/licenses/by-nc-nd/2.0/">Creative Commons BY-NC-ND 2.0 license</a>. Apache, Apache Aurora, and the Apache feather logo are trademarks of The Apache Software Foundation.</p>
+ </div>
+ </div>
+ </div>
+ </body>
+</html>
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+<!DOCTYPE html>
+<html lang="en">
+ <head>
+ <meta charset="utf-8">
+ <meta name="viewport" content="width=device-width, initial-scale=1">
+ <title>Apache Aurora</title>
+ <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css">
+ <link href="/assets/css/main.css" rel="stylesheet">
+ <!-- Analytics -->
+ <script type="text/javascript">
+ var _gaq = _gaq || [];
+ _gaq.push(['_setAccount', 'UA-45879646-1']);
+ _gaq.push(['_setDomainName', 'apache.org']);
+ _gaq.push(['_trackPageview']);
+
+ (function() {
+ var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
+ ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
+ var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
+ })();
+ </script>
+ </head>
+ <body>
+
+ <div class="container-fluid section-header">
+ <div class="container">
+ <div class="nav nav-bar">
+ <a href="/"><img src="/assets/img/aurora_logo_white_bkg.svg" width="300" alt="Transparent Apache Aurora logo with dark background"/></a>
+ <ul class="nav navbar-nav navbar-right">
+ <li><a href="/documentation/latest/">Documentation</a></li>
+ <li><a href="/community/">Community</a></li>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/blog/">Blog</a></li>
+ </ul>
+ </div>
+ </div>
+</div>
+ <div class="container-fluid">
+ <div class="container content">
+ <p>Java code in the aurora repo is built with <a href="http://gradle.org">Gradle</a>.</p>
+
+<h1 id="getting-started">Getting Started</h1>
+
+<p>You will need Java 7 installed and on your <code>PATH</code> or unzipped somewhere with <code>JAVA_HOME</code> set. Then</p>
+<pre class="highlight text">./gradlew tasks
+</pre>
+<p>will bootstrap the build system and show available tasks. This can take a while the first time you
+run it but subsequent runs will be much faster due to cached artifacts.</p>
+
+<h2 id="running-the-tests">Running the Tests</h2>
+
+<p>Aurora has a comprehensive unit test suite. To run the tests use</p>
+<pre class="highlight text">./gradlew build
+</pre>
+<p>Gradle will only re-run tests when dependencies of them have changed. To force a re-run of all
+tests use</p>
+<pre class="highlight text">./gradlew clean build
+</pre>
+<h2 id="running-the-build-with-code-quality-checks">Running the build with code quality checks</h2>
+
+<p>To speed up development iteration, the plain gradle commands will not run static analysis tools.
+However, you should run these before posting a review diff, and <strong>always</strong> run this before pushing a
+commit to origin/master.</p>
+<pre class="highlight text">./gradlew build -Pq
+</pre>
+<h2 id="creating-a-bundle-for-deployment">Creating a bundle for deployment</h2>
+
+<p>Gradle can create a zip file containing Aurora, all of its dependencies, and a launch script with</p>
+<pre class="highlight text">./gradlew distZip
+</pre>
+<p>or a tar file containing the same files with</p>
+<pre class="highlight text">./gradlew distTar
+</pre>
+<p>The output file will be written to <code>dist/distributions/aurora-scheduler.zip</code> or
+<code>dist/distributions/aurora-scheduler.tar</code>.</p>
+
+<h1 id="developing-aurora-java-code">Developing Aurora Java code</h1>
+
+<h2 id="setting-up-an-ide">Setting up an IDE</h2>
+
+<p>Gradle can generate project files for your IDE. To generate an IntelliJ IDEA project run</p>
+<pre class="highlight text">./gradlew idea
+</pre>
+<p>and import the generated <code>aurora.ipr</code> file.</p>
+
+<h2 id="adding-or-upgrading-a-dependency">Adding or Upgrading a Dependency</h2>
+
+<p>New dependencies can be added from Maven central by adding a <code>compile</code> dependency to <code>build.gradle</code>.
+For example, to add a dependency on <code>com.example</code>’s <code>example-lib</code> 1.0 add this block:</p>
+<pre class="highlight text">compile 'com.example:example-lib:1.0'
+</pre>
+<p>NOTE: Anyone thinking about adding a new dependency should first familiarize themself with the
+Apache Foundation’s third-party licensing
+<a href="http://www.apache.org/legal/resolved.html#category-x">policy</a>.</p>
+
+<h1 id="developing-aurora-ui">Developing Aurora UI</h1>
+
+<h2 id="installing-bower-(optional)">Installing bower (optional)</h2>
+
+<p>Third party JS libraries used in Aurora (located at 3rdparty/javascript/bower_components) are
+managed by bower, a JS dependency manager. Bower is only required if you plan to add, remove or
+update JS libraries. Bower can be installed using the following command:</p>
+<pre class="highlight text">npm install -g bower
+</pre>
+<p>Bower depends on node.js and npm. The easiest way to install node on a mac is via brew:</p>
+<pre class="highlight text">brew install node
+</pre>
+<p>For more node.js installation options refer to <a href="https://github.com/joyent/node/wiki/Installation">https://github.com/joyent/node/wiki/Installation</a>.</p>
+
+<p>More info on installing and using bower can be found at: <a href="http://bower.io/">http://bower.io/</a>. Once installed, you can
+use the following commands to view and modify the bower repo at
+3rdparty/javascript/bower_components</p>
+<pre class="highlight text">bower list
+bower install <library name>
+bower remove <library name>
+bower update <library name>
+bower help
+</pre>
+<h1 id="developing-the-aurora-build-system">Developing the Aurora Build System</h1>
+
+<h2 id="bootstrapping-gradle">Bootstrapping Gradle</h2>
+
+<p>The following files were autogenerated by <code>gradle wrapper</code> using gradle 1.8’s
+<a href="http://www.gradle.org/docs/1.8/dsl/org.gradle.api.tasks.wrapper.Wrapper.html">Wrapper</a> plugin and
+should not be modified directly:</p>
+<pre class="highlight text">./gradlew
+./gradlew.bat
+./gradle/wrapper/gradle-wrapper.jar
+./gradle/wrapper/gradle-wrapper.properties
+</pre>
+<p>To upgrade Gradle unpack the new version somewhere, run <code>/path/to/new/gradle wrapper</code> in the
+repository root and commit the changed files.</p>
+
+ </div>
+ </div>
+
+ <div class="container-fluid section-footer buffer">
+ <div class="container">
+ <div class="row">
+ <div class="col-md-2 col-md-offset-1"><h3>Quick Links</h3>
+ <ul>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/community/">Mailing Lists</a></li>
+ <li><a href="http://issues.apache.org/jira/browse/AURORA">Issue Tracking</a></li>
+ <li><a href="/documentation/latest/contributing/">How To Contribute</a></li>
+ </ul>
+ </div>
+ <div class="col-md-2"><h3>The ASF</h3>
+ <ul>
+ <li><a href="http://www.apache.org/licenses/">License</a></li>
+ <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+ <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
+ <li><a href="http://www.apache.org/security/">Security</a></li>
+ </ul>
+ </div>
+ <div class="col-md-6">
+ <p class="disclaimer">Apache Aurora is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.</p>
+ <p class="disclaimer">Copyright 2014 <a href="http://www.apache.org/">Apache Software Foundation</a>. Licensed under the <a href="http://www.apache.org/licenses/">Apache License v2.0</a>. The <a href="https://www.flickr.com/photos/trondk/12706051375/">Aurora Borealis IX photo</a> displayed on the homepage is available under a <a href="https://creativecommons.org/licenses/by-nc-nd/2.0/">Creative Commons BY-NC-ND 2.0 license</a>. Apache, Apache Aurora, and the Apache feather logo are trademarks of The Apache Software Foundation.</p>
+ </div>
+ </div>
+ </div>
+ </body>
+</html>
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+<!DOCTYPE html>
+<html lang="en">
+ <head>
+ <meta charset="utf-8">
+ <meta name="viewport" content="width=device-width, initial-scale=1">
+ <title>Apache Aurora</title>
+ <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css">
+ <link href="/assets/css/main.css" rel="stylesheet">
+ <!-- Analytics -->
+ <script type="text/javascript">
+ var _gaq = _gaq || [];
+ _gaq.push(['_setAccount', 'UA-45879646-1']);
+ _gaq.push(['_setDomainName', 'apache.org']);
+ _gaq.push(['_trackPageview']);
+
+ (function() {
+ var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
+ ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
+ var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
+ })();
+ </script>
+ </head>
+ <body>
+
+ <div class="container-fluid section-header">
+ <div class="container">
+ <div class="nav nav-bar">
+ <a href="/"><img src="/assets/img/aurora_logo_white_bkg.svg" width="300" alt="Transparent Apache Aurora logo with dark background"/></a>
+ <ul class="nav navbar-nav navbar-right">
+ <li><a href="/documentation/latest/">Documentation</a></li>
+ <li><a href="/community/">Community</a></li>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/blog/">Blog</a></li>
+ </ul>
+ </div>
+ </div>
+</div>
+ <div class="container-fluid">
+ <div class="container content">
+ <h1 id="hooks-for-aurora-client-api">Hooks for Aurora Client API</h1>
+
+<ul>
+<li><a href="#introduction">Introduction</a></li>
+<li><a href="#hook-types">Hook Types</a></li>
+<li><a href="#execution-order">Execution Order</a></li>
+<li><a href="#hookable-methods">Hookable Methods</a></li>
+<li><a href="#activating-and-using-hooks">Activating and Using Hooks</a></li>
+<li><a href="#aurora-config-file-settings">.aurora Config File Settings</a></li>
+<li><a href="#command-line">Command Line</a></li>
+<li><a href="#hooks-protocol">Hooks Protocol</a>
+
+<ul>
+<li><a href="#pre_-methods">pre_ Methods</a></li>
+<li><a href="#err_-methods">err_ Methods</a></li>
+<li><a href="#post_-methods">post_ Methods</a></li>
+</ul></li>
+<li><a href="#generic-hooks">Generic Hooks</a></li>
+<li><a href="#hooks-process-checklist">Hooks Process Checklist</a></li>
+</ul>
+
+<h2 id="introduction">Introduction</h2>
+
+<p>You can execute hook methods around Aurora API Client methods when they are called by the Aurora Command Line commands.</p>
+
+<p>Explaining how hooks work is a bit tricky because of some indirection about what they apply to. Basically, a hook is code that executes when a particular Aurora Client API method runs, letting you extend the method’s actions. The hook executes on the client side, specifically on the machine executing Aurora commands.</p>
+
+<p>The catch is that hooks are associated with Aurora Client API methods, which users don’t directly call. Instead, users call Aurora Command Line commands, which call Client API methods during their execution. Since which hooks run depend on which Client API methods get called, you will need to know which Command Line commands call which API methods. Later on, there is a table showing the various associations.</p>
+
+<p><strong>Terminology Note</strong>: From now on, “method(s)” refer to Client API methods, and “command(s)” refer to Command Line commands.</p>
+
+<h2 id="hook-types">Hook Types</h2>
+
+<p>Hooks have three basic types, differing by when they run with respect to their associated method.</p>
+
+<p><code>pre_<method_name></code>: When its associated method is called, the <code>pre_</code> hook executes first, then the called method. If the <code>pre_</code> hook fails, the method never runs. Later code that expected the method to succeed may be affected by this, and result in terminating the Aurora client.</p>
+
+<p>Note that a <code>pre_</code> hook can error-trap internally so it does not
+return <code>False</code>. Designers/contributors of new <code>pre_</code> hooks should
+consider whether or not to error-trap them. You can error trap at the
+highest level very generally and always pass the <code>pre_</code> hook by
+returning <code>True</code>. For example:</p>
+<pre class="highlight python"><span class="k">def</span> <span class="nf">pre_create</span><span class="p">(</span><span class="o">...</span><span class="p">):</span>
+ <span class="n">do_something</span><span class="p">()</span> <span class="c"># if do_something fails with an exception, the create_job is not attempted!</span>
+ <span class="k">return</span> <span class="bp">True</span>
+
+<span class="c"># However...</span>
+<span class="k">def</span> <span class="nf">pre_create</span><span class="p">(</span><span class="o">...</span><span class="p">):</span>
+ <span class="k">try</span><span class="p">:</span>
+ <span class="n">do_something</span><span class="p">()</span> <span class="c"># may cause exception</span>
+ <span class="k">except</span> <span class="n">Exception</span><span class="p">:</span> <span class="c"># generic error trap will catch it</span>
+ <span class="k">pass</span> <span class="c"># and ignore the exception</span>
+ <span class="k">return</span> <span class="bp">True</span> <span class="c"># create_job will run in any case!</span>
+</pre>
+<p><code>post_<method_name></code>: A <code>post_</code> hook executes after its associated method successfully finishes running. If it fails, the already executed method is unaffected. A <code>post_</code> hook’s error is trapped, and any later operations are unaffected.</p>
+
+<p><code>err_<method_name></code>: Executes only when its associated method returns a status other than OK or throws an exception. If an <code>err_</code> hook fails, the already executed method is unaffected. An <code>err_</code> hook’s error is trapped, and any later operations are unaffected.</p>
+
+<h2 id="execution-order">Execution Order</h2>
+
+<p>A command with <code>pre_</code>, <code>post_</code>, and <code>err_</code> hooks defined and activated for its called method executes in the following order when the method successfully executes:</p>
+
+<ol>
+<li>Command called</li>
+<li>Command code executes</li>
+<li>Method Called</li>
+<li><code>pre_</code> method hook runs</li>
+<li>Method runs and successfully finishes</li>
+<li><code>post_</code> method hook runs</li>
+<li>Command code executes</li>
+<li>Command execution ends</li>
+</ol>
+
+<p>The following is what happens when, for the same command and hooks, the method associated with the command suffers an error and does not successfully finish executing:</p>
+
+<ol>
+<li>Command called</li>
+<li>Command code executes</li>
+<li>Method Called</li>
+<li><code>pre_</code> method hook runs</li>
+<li>Method runs and fails</li>
+<li><code>err_</code> method hook runs</li>
+<li>Command Code executes (if <code>err_</code> method does not end the command execution)</li>
+<li>Command execution ends</li>
+</ol>
+
+<p>Note that the <code>post_</code> and <code>err_</code> hooks for the same method can never both run for a single execution of that method.</p>
+
+<h2 id="hookable-methods">Hookable Methods</h2>
+
+<p>You can associate <code>pre_</code>, <code>post_</code>, and <code>err_</code> hooks with the following methods. Since you do not directly interact with the methods, but rather the Aurora Command Line commands that call them, for each method we also list the command(s) that can call the method. Note that a different method or methods may be called by a command depending on how the command’s other code executes. Similarly, multiple commands can call the same method. We also list the methods' argument signatures, which are used by their associated hooks. <a name="Chart"></a></p>
+
+<table><thead>
+<tr>
+<th>Aurora Client API Method</th>
+<th>Client API Method Argument Signature</th>
+<th>Aurora Command Line Command</th>
+</tr>
+</thead><tbody>
+<tr>
+<td><code>cancel_update</code></td>
+<td><code>self</code>, <code>job_key</code></td>
+<td><code>cancel_update</code></td>
+</tr>
+<tr>
+<td><code>create_job</code></td>
+<td><code>self</code>, <code>config</code></td>
+<td><code>create</code>, <code>runtask</td>
+</tr>
+<tr>
+<td><code>restart</code></td>
+<td><code>self</code>, <code>job_key</code>, <code>shards</code>, <code>update_config</code>, <code>health_check_interval_seconds</code></td>
+<td><code>restart</code></td>
+</tr>
+<tr>
+<td><code>update_job</code></td>
+<td><code>self</code>, <code>config</code>, <code>health_check_interval_seconds=3</code>, <code>shards=None</code></td>
+<td><code>update</code></td>
+</tr>
+<tr>
+<td><code>kill_job</code></td>
+<td><code>self</code>, <code>job_key</code>, <code>shards=None</code></td>
+<td><code>kill</code></td>
+</tr>
+</tbody></table>
+
+<p>Some specific examples:</p>
+
+<ul>
+<li><p><code>pre_create_job</code> executes when a <code>create_job</code> method is called, and before the <code>create_job</code> method itself executes.</p></li>
+<li><p><code>post_cancel_update</code> executes after a <code>cancel_update</code> method has successfully finished running.</p></li>
+<li><p><code>err_kill_job</code> executes when the <code>kill_job</code> method is called, but doesn’t successfully finish running.</p></li>
+</ul>
+
+<h2 id="activating-and-using-hooks">Activating and Using Hooks</h2>
+
+<p>By default, hooks are inactive. If you do not want to use hooks, you do not need to make any changes to your code. If you do want to use hooks, you will need to alter your <code>.aurora</code> config file to activate them both for the configuration as a whole as well as for individual <code>Job</code>s. And, of course, you will need to define in your config file what happens when a particular hook executes.</p>
+
+<h2 id=".aurora-config-file-settings">.aurora Config File Settings</h2>
+
+<p>You can define a top-level <code>hooks</code> variable in any <code>.aurora</code> config file. <code>hooks</code> is a list of all objects that define hooks used by <code>Job</code>s defined in that config file. If you do not want to define any hooks for a configuration, <code>hooks</code> is optional.</p>
+<pre class="highlight text">hooks = [Object_with_defined_hooks1, Object_with_defined_hooks2]
+</pre>
+<p>Be careful when assembling a config file using <code>include</code> on multiple smaller config files. If there are multiple files that assign a value to <code>hooks</code>, only the last assignment made will stick. For example, if <code>x.aurora</code> has <code>hooks = [a, b, c]</code> and <code>y.aurora</code> has <code>hooks = [d, e, f]</code> and <code>z.aurora</code> has, in this order, <code>include x.aurora</code> and <code>include y.aurora</code>, the <code>hooks</code> value will be <code>[d, e, f]</code>.</p>
+
+<p>Also, for any <code>Job</code> that you want to use hooks with, its <code>Job</code> definition in the <code>.aurora</code> config file must set an <code>enable_hooks</code> flag to <code>True</code> (it defaults to <code>False</code>). By default, hooks are disabled and you must enable them for <code>Job</code>s of your choice.</p>
+
+<p>To summarize, to use hooks for a particular job, you must both activate hooks for your config file as a whole, and for that job. Activating hooks only for individual jobs won’t work, nor will only activating hooks for your config file as a whole. You must also specify the hooks' defining object in the <code>hooks</code> variable.</p>
+
+<p>Recall that <code>.aurora</code> config files are written in Pystachio. So the following turns on hooks for production jobs at cluster1 and cluster2, but leaves them off for similar jobs with a defined user role. Of course, you also need to list the objects that define the hooks in your config file’s <code>hooks</code> variable.</p>
+<pre class="highlight python"><span class="n">jobs</span> <span class="o">=</span> <span class="p">[</span>
+ <span class="n">Job</span><span class="p">(</span><span class="n">enable_hooks</span> <span class="o">=</span> <span class="bp">True</span><span class="p">,</span> <span class="n">cluster</span> <span class="o">=</span> <span class="n">c</span><span class="p">,</span> <span class="n">env</span> <span class="o">=</span> <span class="s">'prod'</span><span class="p">)</span> <span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="p">(</span><span class="s">'cluster1'</span><span class="p">,</span> <span class="s">'cluster2'</span><span class="p">)</span>
+ <span class="p">]</span>
+<span class="n">jobs</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span>
+ <span class="n">Job</span><span class="p">(</span><span class="n">cluster</span> <span class="o">=</span> <span class="n">c</span><span class="p">,</span> <span class="n">env</span> <span class="o">=</span> <span class="s">'prod'</span><span class="p">,</span> <span class="n">role</span> <span class="o">=</span> <span class="n">getpass</span><span class="o">.</span><span class="n">getuser</span><span class="p">())</span> <span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="p">(</span><span class="s">'cluster1'</span><span class="p">,</span> <span class="s">'cluster2'</span><span class="p">))</span>
+ <span class="c"># Hooks disabled for these jobs</span>
+</pre>
+<h2 id="command-line">Command Line</h2>
+
+<p>All Aurora Command Line commands now accept an <code>.aurora</code> config file as an optional parameter (some, of course, accept it as a required parameter). Whenever a command has a <code>.aurora</code> file parameter, any hooks specified and activated in the <code>.aurora</code> file can be used. For example:</p>
+<pre class="highlight text">aurora restart cluster1/role/env/app myapp.aurora
+</pre>
+<p>The command activates any hooks specified and activated in <code>myapp.aurora</code>. For the <code>restart</code> command, that is the only thing the <code>myapp.aurora</code> parameter does. So, if the command was the following, since there is no <code>.aurora</code> config file to specify any hooks, no hooks on the <code>restart</code> command can run.</p>
+<pre class="highlight text">aurora restart cluster1/role/env/app
+</pre>
+<h2 id="hooks-protocol">Hooks Protocol</h2>
+
+<p>Any object defined in the <code>.aurora</code> config file can define hook methods. You should define your hook methods within a class, and then use the class name as a value in the <code>hooks</code> list in your config file.</p>
+
+<p>Note that you can define other methods in the class that its hook methods can call; all the logic of a hook does not have to be in its definition.</p>
+
+<p>The following example defines a class containing a <code>pre_kill_job</code> hook definition that calls another method defined in the class.</p>
+<pre class="highlight python"><span class="c"># Defines a method pre_kill_job</span>
+<span class="k">class</span> <span class="nc">KillConfirmer</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span>
+ <span class="k">def</span> <span class="nf">confirm</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">msg</span><span class="p">):</span>
+ <span class="k">return</span> <span class="nb">raw_input</span><span class="p">(</span><span class="n">msg</span><span class="p">)</span><span class="o">.</span><span class="n">lower</span><span class="p">()</span> <span class="o">==</span> <span class="s">'yes'</span>
+
+ <span class="k">def</span> <span class="nf">pre_kill_job</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">job_key</span><span class="p">,</span> <span class="n">shards</span><span class="o">=</span><span class="bp">None</span><span class="p">):</span>
+ <span class="n">shards</span> <span class="o">=</span> <span class="p">(</span><span class="s">'shards </span><span class="si">%</span><span class="s">s'</span> <span class="o">%</span> <span class="n">shards</span><span class="p">)</span> <span class="k">if</span> <span class="n">shards</span> <span class="ow">is</span> <span class="ow">not</span> <span class="bp">None</span> <span class="k">else</span> <span class="s">'all shards'</span>
+ <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">confirm</span><span class="p">(</span><span class="s">'Are you sure you want to kill </span><span class="si">%</span><span class="s">s (</span><span class="si">%</span><span class="s">s)? (yes/no): '</span>
+ <span class="o">%</span> <span class="p">(</span><span class="n">job_key</span><span class="p">,</span> <span class="n">shards</span><span class="p">))</span>
+</pre>
+<h3 id="pre_-methods">pre_ Methods</h3>
+
+<p><code>pre_</code> methods have the signature:</p>
+<pre class="highlight text">pre_<API method name>(self, <associated method's signature>)
+</pre>
+<p><code>pre_</code> methods have the same signature as their associated method, with the addition of <code>self</code> as the first parameter. See the <a href="#Chart">chart</a> above for the mapping of parameters to methods. When writing <code>pre_</code> methods, you can use the <code>*</code> and <code>**</code> syntax to designate that all unspecified parameters are passed in a list to the <code>*</code>ed variable and all named parameters with values are passed as name/value pairs to the <code>**</code>ed variable.</p>
+
+<p>If this method returns False, the API command call aborts.</p>
+
+<h3 id="err_-methods">err_ Methods</h3>
+
+<p><code>err_</code> methods have the signature:</p>
+<pre class="highlight text">err_<API method name>(self, exc, <associated method's signature>)
+</pre>
+<p><code>err_</code> methods have the same signature as their associated method, with the addition of a first parameter <code>self</code> and a second parameter <code>exc</code>. <code>exc</code> is either a result with responseCode other than <code>ResponseCode.OK</code> or an <code>Exception</code>. See the <a href="#Chart">chart</a> above for the mapping of parameters to methods. When writing <code>err</code>_ methods, you can use the <code>*</code> and <code>**</code> syntax to designate that all unspecified parameters are passed in a list to the <code>*</code>ed variable and all named parameters with values are passed as name/value pairs to the <code>**</code>ed variable.</p>
+
+<p><code>err_</code> method return codes are ignored.</p>
+
+<h3 id="post_-methods">post_ Methods</h3>
+
+<p><code>post_</code> methods have the signature:</p>
+<pre class="highlight text">post_<API method name>(self, result, <associated method signature>)
+</pre>
+<p><code>post_</code> method parameters are <code>self</code>, then <code>result</code>, followed by the same parameter signature as their associated method. <code>result</code> is the result of the associated method call. See the <a href="#chart">chart</a> above for the mapping of parameters to methods. When writing <code>post_</code> methods, you can use the <code>*</code> and <code>**</code> syntax to designate that all unspecified arguments are passed in a list to the <code>*</code>ed parameter and all unspecified named arguments with values are passed as name/value pairs to the <code>**</code>ed parameter.</p>
+
+<p><code>post_</code> method return codes are ignored.</p>
+
+<h2 id="generic-hooks">Generic Hooks</h2>
+
+<p>There are five Aurora API Methods which any of the three hook types can attach to. Thus, there are 15 possible hook/method combinations for a single <code>.aurora</code> config file. Say that you define <code>pre_</code> and <code>post_</code> hooks for the <code>restart</code> method. That leaves 13 undefined hook/method combinations; <code>err_restart</code> and the 3 <code>pre_</code>, <code>post_</code>, and <code>err_</code> hooks for each of the other 4 hookable methods. You can define what happens when any of these otherwise undefined 13 hooks execute via a generic hook, whose signature is:</p>
+<pre class="highlight python"><span class="n">generic_hook</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">hook_config</span><span class="p">,</span> <span class="n">event</span><span class="p">,</span> <span class="n">method_name</span><span class="p">,</span> <span class="n">result_or_err</span><span class="p">,</span> <span class="n">args</span><span class="o">*</span><span class="p">,</span> <span class="n">kw</span><span class="o">**</span><span class="p">)</span>
+</pre>
+<p>where:</p>
+
+<ul>
+<li><p><code>hook_config</code> is a named tuple of <code>config</code> (the Pystashio <code>config</code> object) and <code>job_key</code>.</p></li>
+<li><p><code>event</code> is one of <code>pre</code>, <code>err</code>, or <code>post</code>, indicating which type of hook the genetic hook is standing in for. For example, assume no specific hooks were defined for the <code>restart</code> API command. If <code>generic_hook</code> is defined and activated, and <code>restart</code> is called, <code>generic_hook</code> will effectively run as <code>pre_restart</code>, <code>post_restart</code>, and <code>err_restart</code>. You can use a selection statement on this value so that <code>generic_hook</code> will act differently based on whether it is standing in for a <code>pre_</code>, <code>post_</code>, or <code>err_</code> hook.</p></li>
+<li><p><code>method_name</code> is the Client API method name whose execution is causing this execution of the <code>generic_hook</code>.</p></li>
+<li><p><code>args*</code>, <code>kw**</code> are the API method arguments and keyword arguments respectively.</p></li>
+<li><p><code>result_or_err</code> is a tri-state parameter taking one of these three values:</p>
+
+<ol>
+<li>None for <code>pre_</code>hooks</li>
+<li><code>result</code> for <code>post_</code> nooks</li>
+<li><code>exc</code> for <code>err_</code> hooks</li>
+</ol></li>
+</ul>
+
+<p>Example:</p>
+<pre class="highlight python"><span class="c"># Overrides the standard do-nothing generic_hook by adding a log writing operation.</span>
+<span class="kn">from</span> <span class="nn">twitter.common</span> <span class="kn">import</span> <span class="n">log</span>
+ <span class="k">class</span> <span class="nc">Logger</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span>
+ <span class="s">'''Adds to the log every time a hookable API method is called'''</span>
+ <span class="k">def</span> <span class="nf">generic_hook</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">hook_config</span><span class="p">,</span> <span class="n">event</span><span class="p">,</span> <span class="n">method_name</span><span class="p">,</span> <span class="n">result_or_err</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kw</span><span class="p">)</span>
+ <span class="n">log</span><span class="o">.</span><span class="n">info</span><span class="p">(</span><span class="s">'</span><span class="si">%</span><span class="s">s: </span><span class="si">%</span><span class="s">s_</span><span class="si">%</span><span class="s">s of </span><span class="si">%</span><span class="s">s'</span>
+ <span class="o">%</span> <span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">__class__</span><span class="o">.</span><span class="n">__name__</span><span class="p">,</span> <span class="n">event</span><span class="p">,</span> <span class="n">method_name</span><span class="p">,</span> <span class="n">hook_config</span><span class="o">.</span><span class="n">job_key</span><span class="p">))</span>
+</pre>
+<h2 id="hooks-process-checklist">Hooks Process Checklist</h2>
+
+<ol>
+<li>In your <code>.aurora</code> config file, add a <code>hooks</code> variable. Note that you may want to define a <code>.aurora</code> file only for hook definitions and then include this file in multiple other config files that you want to use the same hooks.</li>
+</ol>
+<pre class="highlight python"><span class="n">hooks</span> <span class="o">=</span> <span class="p">[]</span>
+</pre>
+<ol>
+<li>In the <code>hooks</code> variable, list all objects that define hooks used by <code>Job</code>s defined in this config:</li>
+</ol>
+<pre class="highlight python"><span class="n">hooks</span> <span class="o">=</span> <span class="p">[</span><span class="n">Object_hook_definer1</span><span class="p">,</span> <span class="n">Object_hook_definer2</span><span class="p">]</span>
+</pre>
+<ol>
+<li><p>For each job that uses hooks in this config file, add <code>enable_hooks = True</code> to the <code>Job</code> definition. Note that this is necessary even if you only want to use the generic hook.</p></li>
+<li><p>Write your <code>pre_</code>, <code>post_</code>, and <code>err_</code> hook definitions as part of an object definition in your <code>.aurora</code> config file.</p></li>
+<li><p>If desired, write your <code>generic_hook</code> definition as part of an object definition in your <code>.aurora</code> config file. Remember, the object must be listed as a member of <code>hooks</code>.</p></li>
+<li><p>If your Aurora command line command does not otherwise take an <code>.aurora</code> config file argument, add the appropriate <code>.aurora</code> file as an argument in order to define and activate the configuration’s hooks.</p></li>
+</ol>
+
+ </div>
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+ <p class="disclaimer">Copyright 2014 <a href="http://www.apache.org/">Apache Software Foundation</a>. Licensed under the <a href="http://www.apache.org/licenses/">Apache License v2.0</a>. The <a href="https://www.flickr.com/photos/trondk/12706051375/">Aurora Borealis IX photo</a> displayed on the homepage is available under a <a href="https://creativecommons.org/licenses/by-nc-nd/2.0/">Creative Commons BY-NC-ND 2.0 license</a>. Apache, Apache Aurora, and the Apache feather logo are trademarks of The Apache Software Foundation.</p>
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+ </div>
+</div>
+ <div class="container-fluid">
+ <div class="container content">
+ <h1 id="documentation">Documentation</h1>
+
+<h2 id="introduction">Introduction</h2>
+
+<p>Apache Aurora is a service scheduler that runs on top of Apache Mesos, enabling you to run long-running services that take advantage of Apache Mesos' scalability, fault-tolerance, and resource isolation. This documentation has been organized into sections with three audiences in mind:</p>
+
+<ul>
+<li>Users: General information about the project and to learn how to run an Aurora job.</li>
+<li>Operators: For those that wish to manage and fine-tune an Aurora cluster.</li>
+<li>Developers: All the information you need to start modifying Aurora and contributing back to the project.</li>
+</ul>
+
+<p>This documentation is a work in progress, and we encourage you to ask questions on the <a href="http://aurora.incubator.apache.org/community/">Aurora developer list</a> or the <code>#aurora</code> IRC channel on <code>irc.freenode.net</code>.</p>
+
+<h2 id="users">Users</h2>
+
+<ul>
+<li><a href="/documentation/latest/vagrant/">Install Aurora on virtual machines on your private machine</a></li>
+<li><a href="/documentation/latest/tutorial/">Hello World Tutorial</a></li>
+<li><a href="/documentation/latest/user-guide/">User Guide</a></li>
+<li><a href="/documentation/latest/configuration-tutorial/">Configuration Tutorial</a></li>
+<li><a href="/documentation/latest/configuration-reference/">Aurora + Thermos Reference</a></li>
+<li><a href="/documentation/latest/client-commands/">Command Line Client</a></li>
+<li><a href="/documentation/latest/clientv2/">Aurora Client v2</a></li>
+<li><a href="/documentation/latest/cron-jobs/">Cron Jobs</a></li>
+</ul>
+
+<h2 id="operators">Operators</h2>
+
+<ul>
+<li><a href="/documentation/latest/deploying-aurora-scheduler/">Deploy Aurora</a></li>
+<li><a href="/documentation/latest/monitoring/">Monitoring</a></li>
+<li><a href="/documentation/latest/hooks/">Hooks for Aurora Client API</a></li>
+<li><a href="/documentation/latest/storage/">Scheduler Storage</a></li>
+<li><a href="/documentation/latest/storage-config/">Scheduler Storage and Maintenance</a></li>
+<li><a href="/documentation/latest/sla/">SLA Measurement</a></li>
+<li><a href="/documentation/latest/resource-isolation/">Resource Isolation and Sizing</a></li>
+<li><a href="/documentation/latest/test-resource-generation/">Generating test resources</a></li>
+</ul>
+
+<h2 id="developers">Developers</h2>
+
+<ul>
+<li><a href="/documentation/latest/contributing/">Contributing to the project</a></li>
+<li><a href="/documentation/latest/developing-aurora-scheduler/">Developing the Aurora Scheduler</a></li>
+<li><a href="/documentation/latest/developing-aurora-client/">Developing the Aurora Client</a></li>
+<li><a href="/documentation/latest/committers/">Committers Guide</a></li>
+</ul>
+
+ </div>
+ </div>
+
+ <div class="container-fluid section-footer buffer">
+ <div class="container">
+ <div class="row">
+ <div class="col-md-2 col-md-offset-1"><h3>Quick Links</h3>
+ <ul>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/community/">Mailing Lists</a></li>
+ <li><a href="http://issues.apache.org/jira/browse/AURORA">Issue Tracking</a></li>
+ <li><a href="/documentation/latest/contributing/">How To Contribute</a></li>
+ </ul>
+ </div>
+ <div class="col-md-2"><h3>The ASF</h3>
+ <ul>
+ <li><a href="http://www.apache.org/licenses/">License</a></li>
+ <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+ <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
+ <li><a href="http://www.apache.org/security/">Security</a></li>
+ </ul>
+ </div>
+ <div class="col-md-6">
+ <p class="disclaimer">Apache Aurora is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.</p>
+ <p class="disclaimer">Copyright 2014 <a href="http://www.apache.org/">Apache Software Foundation</a>. Licensed under the <a href="http://www.apache.org/licenses/">Apache License v2.0</a>. The <a href="https://www.flickr.com/photos/trondk/12706051375/">Aurora Borealis IX photo</a> displayed on the homepage is available under a <a href="https://creativecommons.org/licenses/by-nc-nd/2.0/">Creative Commons BY-NC-ND 2.0 license</a>. Apache, Apache Aurora, and the Apache feather logo are trademarks of The Apache Software Foundation.</p>
+ </div>
+ </div>
+ </div>
+ </body>
+</html>
\ No newline at end of file
[06/18] incubator-aurora-website git commit: Initial move of website
over to git
Posted by jf...@apache.org.
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/source/assets/js/bootstrap.min.js
----------------------------------------------------------------------
diff --git a/source/assets/js/bootstrap.min.js b/source/assets/js/bootstrap.min.js
new file mode 100644
index 0000000..848258d
--- /dev/null
+++ b/source/assets/js/bootstrap.min.js
@@ -0,0 +1,6 @@
+/*!
+* Bootstrap.js by @fat & @mdo
+* Copyright 2013 Twitter, Inc.
+* http://www.apache.org/licenses/LICENSE-2.0.txt
+*/
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\ No newline at end of file
[03/18] incubator-aurora-website git commit: Initial move of website
over to git
Posted by jf...@apache.org.
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/source/documentation/latest/configuration-reference.md
----------------------------------------------------------------------
diff --git a/source/documentation/latest/configuration-reference.md b/source/documentation/latest/configuration-reference.md
new file mode 100644
index 0000000..91aaf24
--- /dev/null
+++ b/source/documentation/latest/configuration-reference.md
@@ -0,0 +1,538 @@
+Aurora + Thermos Configuration Reference
+========================================
+
+- [Aurora + Thermos Configuration Reference](#aurora--thermos-configuration-reference)
+- [Introduction](#introduction)
+- [Process Schema](#process-schema)
+ - [Process Objects](#process-objects)
+ - [name](#name)
+ - [cmdline](#cmdline)
+ - [max_failures](#max_failures)
+ - [daemon](#daemon)
+ - [ephemeral](#ephemeral)
+ - [min_duration](#min_duration)
+ - [final](#final)
+- [Task Schema](#task-schema)
+ - [Task Object](#task-object)
+ - [name](#name-1)
+ - [processes](#processes)
+ - [constraints](#constraints)
+ - [resources](#resources)
+ - [max_failures](#max_failures-1)
+ - [max_concurrency](#max_concurrency)
+ - [finalization_wait](#finalization_wait)
+ - [Constraint Object](#constraint-object)
+ - [Resource Object](#resource-object)
+- [Job Schema](#job-schema)
+ - [Job Objects](#job-objects)
+ - [Services](#services)
+ - [UpdateConfig Objects](#updateconfig-objects)
+ - [HealthCheckConfig Objects](#healthcheckconfig-objects)
+ - [Announcer Objects](#announcer-objects)
+- [Specifying Scheduling Constraints](#specifying-scheduling-constraints)
+- [Template Namespaces](#template-namespaces)
+ - [mesos Namespace](#mesos-namespace)
+ - [thermos Namespace](#thermos-namespace)
+- [Basic Examples](#basic-examples)
+ - [hello_world.aurora](#hello_worldaurora)
+ - [Environment Tailoring](#environment-tailoring)
+ - [hello_world_productionized.aurora](#hello_world_productionizedaurora)
+
+Introduction
+============
+
+Don't know where to start? The Aurora configuration schema is very
+powerful, and configurations can become quite complex for advanced use
+cases.
+
+For examples of simple configurations to get something up and running
+quickly, check out the [Tutorial](/documentation/latest/tutorial/). When you feel comfortable with the basics, move
+on to the [Configuration Tutorial](/documentation/latest/configuration-tutorial/) for more in-depth coverage of
+configuration design.
+
+For additional basic configuration examples, see [the end of this document](#BasicExamples).
+
+Process Schema
+==============
+
+Process objects consist of required `name` and `cmdline` attributes. You can customize Process
+behavior with its optional attributes. Remember, Processes are handled by Thermos.
+
+### Process Objects
+
+ **Attribute Name** | **Type** | **Description**
+ ------------------- | :---------: | ---------------------------------
+ **name** | String | Process name (Required)
+ **cmdline** | String | Command line (Required)
+ **max_failures** | Integer | Maximum process failures (Default: 1)
+ **daemon** | Boolean | When True, this is a daemon process. (Default: False)
+ **ephemeral** | Boolean | When True, this is an ephemeral process. (Default: False)
+ **min_duration** | Integer | Minimum duration between process restarts in seconds. (Default: 15)
+ **final** | Boolean | When True, this process is a finalizing one that should run last. (Default: False)
+
+#### name
+
+The name is any valid UNIX filename string (specifically no
+slashes, NULLs or leading periods). Within a Task object, each Process name
+must be unique.
+
+#### cmdline
+
+The command line run by the process. The command line is invoked in a bash
+subshell, so can involve fully-blown bash scripts. However, nothing is
+supplied for command-line arguments so `$*` is unspecified.
+
+#### max_failures
+
+The maximum number of failures (non-zero exit statuses) this process can
+have before being marked permanently failed and not retried. If a
+process permanently fails, Thermos looks at the failure limit of the task
+containing the process (usually 1) to determine if the task has
+failed as well.
+
+Setting `max_failures` to 0 makes the process retry
+indefinitely until it achieves a successful (zero) exit status.
+It retries at most once every `min_duration` seconds to prevent
+an effective denial of service attack on the coordinating Thermos scheduler.
+
+#### daemon
+
+By default, Thermos processes are non-daemon. If `daemon` is set to True, a
+successful (zero) exit status does not prevent future process runs.
+Instead, the process reinvokes after `min_duration` seconds.
+However, the maximum failure limit still applies. A combination of
+`daemon=True` and `max_failures=0` causes a process to retry
+indefinitely regardless of exit status. This should be avoided
+for very short-lived processes because of the accumulation of
+checkpointed state for each process run. When running in Mesos
+specifically, `max_failures` is capped at 100.
+
+#### ephemeral
+
+By default, Thermos processes are non-ephemeral. If `ephemeral` is set to
+True, the process' status is not used to determine if its containing task
+has completed. For example, consider a task with a non-ephemeral
+webserver process and an ephemeral logsaver process
+that periodically checkpoints its log files to a centralized data store.
+The task is considered finished once the webserver process has
+completed, regardless of the logsaver's current status.
+
+#### min_duration
+
+Processes may succeed or fail multiple times during a single task's
+duration. Each of these is called a *process run*. `min_duration` is
+the minimum number of seconds the scheduler waits before running the
+same process.
+
+#### final
+
+Processes can be grouped into two classes: ordinary processes and
+finalizing processes. By default, Thermos processes are ordinary. They
+run as long as the task is considered healthy (i.e., no failure
+limits have been reached.) But once all regular Thermos processes
+finish or the task reaches a certain failure threshold, it
+moves into a "finalization" stage and runs all finalizing
+processes. These are typically processes necessary for cleaning up the
+task, such as log checkpointers, or perhaps e-mail notifications that
+the task completed.
+
+Finalizing processes may not depend upon ordinary processes or
+vice-versa, however finalizing processes may depend upon other
+finalizing processes and otherwise run as a typical process
+schedule.
+
+Task Schema
+===========
+
+Tasks fundamentally consist of a `name` and a list of Process objects stored as the
+value of the `processes` attribute. Processes can be further constrained with
+`constraints`. By default, `name`'s value inherits from the first Process in the
+`processes` list, so for simple `Task` objects with one Process, `name`
+can be omitted. In Mesos, `resources` is also required.
+
+### Task Object
+
+ **param** | **type** | **description**
+ --------- | :---------: | ---------------
+ ```name``` | String | Process name (Required) (Default: ```processes0.name```)
+ ```processes``` | List of ```Process``` objects | List of ```Process``` objects bound to this task. (Required)
+ ```constraints``` | List of ```Constraint``` objects | List of ```Constraint``` objects constraining processes.
+ ```resources``` | ```Resource``` object | Resource footprint. (Required)
+ ```max_failures``` | Integer | Maximum process failures before being considered failed (Default: 1)
+ ```max_concurrency``` | Integer | Maximum number of concurrent processes (Default: 0, unlimited concurrency.)
+ ```finalization_wait``` | Integer | Amount of time allocated for finalizing processes, in seconds. (Default: 30)
+
+#### name
+`name` is a string denoting the name of this task. It defaults to the name of the first Process in
+the list of Processes associated with the `processes` attribute.
+
+#### processes
+
+`processes` is an unordered list of `Process` objects. To constrain the order
+in which they run, use `constraints`.
+
+##### constraints
+
+A list of `Constraint` objects. Currently it supports only one type,
+the `order` constraint. `order` is a list of process names
+that should run in the order given. For example,
+
+ process = Process(cmdline = "echo hello {{name}}")
+ task = Task(name = "echoes",
+ processes = [process(name = "jim"), process(name = "bob")],
+ constraints = [Constraint(order = ["jim", "bob"]))
+
+Constraints can be supplied ad-hoc and in duplicate. Not all
+Processes need be constrained, however Tasks with cycles are
+rejected by the Thermos scheduler.
+
+Use the `order` function as shorthand to generate `Constraint` lists.
+The following:
+
+ order(process1, process2)
+
+is shorthand for
+
+ [Constraint(order = [process1.name(), process2.name()])]
+
+#### resources
+
+Takes a `Resource` object, which specifies the amounts of CPU, memory, and disk space resources
+to allocate to the Task.
+
+#### max_failures
+
+`max_failures` is the number of times processes that are part of this
+Task can fail before the entire Task is marked for failure.
+
+For example:
+
+ template = Process(max_failures=10)
+ task = Task(
+ name = "fail",
+ processes = [
+ template(name = "failing", cmdline = "exit 1"),
+ template(name = "succeeding", cmdline = "exit 0")
+ ],
+ max_failures=2)
+
+The `failing` Process could fail 10 times before being marked as
+permanently failed, and the `succeeding` Process would succeed on the
+first run. The task would succeed despite only allowing for two failed
+processes. To be more specific, there would be 10 failed process runs
+yet 1 failed process.
+
+#### max_concurrency
+
+For Tasks with a number of expensive but otherwise independent
+processes, you may want to limit the amount of concurrency
+the Thermos scheduler provides rather than artificially constraining
+it via `order` constraints. For example, a test framework may
+generate a task with 100 test run processes, but wants to run it on
+a machine with only 4 cores. You can limit the amount of parallelism to
+4 by setting `max_concurrency=4` in your task configuration.
+
+For example, the following task spawns 180 Processes ("mappers")
+to compute individual elements of a 180 degree sine table, all dependent
+upon one final Process ("reducer") to tabulate the results:
+
+ def make_mapper(id):
+ return Process(
+ name = "mapper%03d" % id,
+ cmdline = "echo 'scale=50;s(%d\*4\*a(1)/180)' | bc -l >
+ temp.sine_table.%03d" % (id, id))
+
+ def make_reducer():
+ return Process(name = "reducer", cmdline = "cat temp.\* | nl \> sine\_table.txt
+ && rm -f temp.\*")
+
+ processes = map(make_mapper, range(180))
+
+ task = Task(
+ name = "mapreduce",
+ processes = processes + [make\_reducer()],
+ constraints = [Constraint(order = [mapper.name(), 'reducer']) for mapper
+ in processes],
+ max_concurrency = 8)
+
+#### finalization_wait
+
+Tasks have three active stages: `ACTIVE`, `CLEANING`, and `FINALIZING`. The
+`ACTIVE` stage is when ordinary processes run. This stage lasts as
+long as Processes are running and the Task is healthy. The moment either
+all Processes have finished successfully or the Task has reached a
+maximum Process failure limit, it goes into `CLEANING` stage and send
+SIGTERMs to all currently running Processes and their process trees.
+Once all Processes have terminated, the Task goes into `FINALIZING` stage
+and invokes the schedule of all Processes with the "final" attribute set to True.
+
+This whole process from the end of `ACTIVE` stage to the end of `FINALIZING`
+must happen within `finalization_wait` seconds. If it does not
+finish during that time, all remaining Processes are sent SIGKILLs
+(or if they depend upon uncompleted Processes, are
+never invoked.)
+
+Client applications with higher priority may force a shorter
+finalization wait (e.g. through parameters to `thermos kill`), so this
+is mostly a best-effort signal.
+
+### Constraint Object
+
+Current constraint objects only support a single ordering constraint, `order`,
+which specifies its processes run sequentially in the order given. By
+default, all processes run in parallel when bound to a `Task` without
+ordering constraints.
+
+ param | type | description
+ ----- | :----: | -----------
+ order | List of String | List of processes by name (String) that should be run serially.
+
+### Resource Object
+
+Specifies the amount of CPU, Ram, and disk resources the task needs. See the
+[Resource Isolation document](/documentation/latest/resource-isolation/) for suggested values and to understand how
+resources are allocated.
+
+ param | type | description
+ ----- | :----: | -----------
+ ```cpu``` | Float | Fractional number of cores required by the task.
+ ```ram``` | Integer | Bytes of RAM required by the task.
+ ```disk``` | Integer | Bytes of disk required by the task.
+
+Job Schema
+==========
+
+### Job Objects
+
+ name | type | description
+ ------ | :-------: | -------
+ ```task``` | Task | The Task object to bind to this job. Required.
+ ```name``` | String | Job name. (Default: inherited from the task attribute's name)
+ ```role``` | String | Job role account. Required.
+ ```cluster``` | String | Cluster in which this job is scheduled. Required.
+ ```environment``` | String | Job environment, default ```devel```. Must be one of ```prod```, ```devel```, ```test``` or ```staging<number>```.
+ ```contact``` | String | Best email address to reach the owner of the job. For production jobs, this is usually a team mailing list.
+ ```instances```| Integer | Number of instances (sometimes referred to as replicas or shards) of the task to create. (Default: 1)
+ ```cron_schedule``` | String | Cron schedule in cron format. May only be used with non-service jobs. See [Cron Jobs](/documentation/latest/cron-jobs/) for more information. Default: None (not a cron job.)
+ ```cron_collision_policy``` | String | Policy to use when a cron job is triggered while a previous run is still active. KILL_EXISTING Kill the previous run, and schedule the new run CANCEL_NEW Let the previous run continue, and cancel the new run. (Default: KILL_EXISTING)
+ ```update_config``` | ```update_config``` object | Parameters for controlling the rate and policy of rolling updates.
+ ```constraints``` | dict | Scheduling constraints for the tasks. See the section on the [constraint specification language](#Specifying-Scheduling-Constraints)
+ ```service``` | Boolean | If True, restart tasks regardless of success or failure. (Default: False)
+ ```max_task_failures``` | Integer | Maximum number of failures after which the task is considered to have failed (Default: 1) Set to -1 to allow for infinite failures
+ ```priority``` | Integer | Preemption priority to give the task (Default 0). Tasks with higher priorities may preempt tasks at lower priorities.
+ ```production``` | Boolean | Whether or not this is a production task backed by quota (Default: False). Production jobs may preempt any non-production job, and may only be preempted by production jobs in the same role and of higher priority. To run jobs at this level, the job role must have the appropriate quota.
+ ```health_check_config``` | ```heath_check_config``` object | Parameters for controlling a task's health checks via HTTP. Only used if a health port was assigned with a command line wildcard.
+
+### Services
+
+Jobs with the `service` flag set to True are called Services. The `Service`
+alias can be used as shorthand for `Job` with `service=True`.
+Services are differentiated from non-service Jobs in that tasks
+always restart on completion, whether successful or unsuccessful.
+Jobs without the service bit set only restart up to
+`max_task_failures` times and only if they terminated unsuccessfully
+either due to human error or machine failure.
+
+### UpdateConfig Objects
+
+Parameters for controlling the rate and policy of rolling updates.
+
+| object | type | description
+| ---------------------------- | :------: | ------------
+| ```batch_size``` | Integer | Maximum number of shards to be updated in one iteration (Default: 1)
+| ```restart_threshold``` | Integer | Maximum number of seconds before a shard must move into the ```RUNNING``` state before considered a failure (Default: 60)
+| ```watch_secs``` | Integer | Minimum number of seconds a shard must remain in ```RUNNING``` state before considered a success (Default: 45)
+| ```max_per_shard_failures``` | Integer | Maximum number of restarts per shard during update. Increments total failure count when this limit is exceeded. (Default: 0)
+| ```max_total_failures``` | Integer | Maximum number of shard failures to be tolerated in total during an update. Cannot be greater than or equal to the total number of tasks in a job. (Default: 0)
+
+### HealthCheckConfig Objects
+
+Parameters for controlling a task's health checks via HTTP.
+
+| object | type | description
+| ------- | :-------: | --------
+| ```initial_interval_secs``` | Integer | Initial delay for performing an HTTP health check. (Default: 15)
+| ```interval_secs``` | Integer | Interval on which to check the task's health via HTTP. (Default: 10)
+| ```timeout_secs``` | Integer | HTTP request timeout. (Default: 1)
+| ```max_consecutive_failures``` | Integer | Maximum number of consecutive failures that tolerated before considering a task unhealthy (Default: 0)
+
+### Announcer Objects
+
+If the `announce` field in the Job configuration is set, each task will be
+registered in the ServerSet `/aurora/role/environment/jobname` in the
+zookeeper ensemble configured by the executor. If no Announcer object is specified,
+no announcement will take place. For more information about ServerSets, see the [User Guide](/documentation/latest/user-guide/).
+
+| object | type | description
+| ------- | :-------: | --------
+| ```primary_port``` | String | Which named port to register as the primary endpoint in the ServerSet (Default: `http`)
+| ```portmap``` | dict | A mapping of additional endpoints to announced in the ServerSet (Default: `{ 'aurora': '{{primary_port}}' }`)
+
+### Port aliasing with the Announcer `portmap`
+
+The primary endpoint registered in the ServerSet is the one allocated to the port
+specified by the `primary_port` in the `Announcer` object, by default
+the `http` port. This port can be referenced from anywhere within a configuration
+as `{{thermos.ports[http]}}`.
+
+Without the port map, each named port would be allocated a unique port number.
+The `portmap` allows two different named ports to be aliased together. The default
+`portmap` aliases the `aurora` port (i.e. `{{thermos.ports[aurora]}}`) to
+the `http` port. Even though the two ports can be referenced independently,
+only one port is allocated by Mesos. Any port referenced in a `Process` object
+but which is not in the portmap will be allocated dynamically by Mesos and announced as well.
+
+It is possible to use the portmap to alias names to static port numbers, e.g.
+`{'http': 80, 'https': 443, 'aurora': 'http'}`. In this case, referencing
+`{{thermos.ports[aurora]}}` would look up `{{thermos.ports[http]}}` then
+find a static port 80. No port would be requested of or allocated by Mesos.
+
+Static ports should be used cautiously as Aurora does nothing to prevent two
+tasks with the same static port allocations from being co-scheduled.
+External constraints such as slave attributes should be used to enforce such
+guarantees should they be needed.
+
+Specifying Scheduling Constraints
+=================================
+
+Most users will not need to specify constraints explicitly, as the
+scheduler automatically inserts reasonable defaults that attempt to
+ensure reliability without impacting schedulability. For example, the
+scheduler inserts a `host: limit:1` constraint, ensuring
+that your shards run on different physical machines. Please do not
+set this field unless you are sure of what you are doing.
+
+In the `Job` object there is a map `constraints` from String to String
+allowing the user to tailor the schedulability of tasks within the job.
+
+Each slave in the cluster is assigned a set of string-valued
+key/value pairs called attributes. For example, consider the host
+`cluster1-aaa-03-sr2` and its following attributes (given in key:value
+format): `host:cluster1-aaa-03-sr2` and `rack:aaa`.
+
+The constraint map's key value is the attribute name in which we
+constrain Tasks within our Job. The value is how we constrain them.
+There are two types of constraints: *limit constraints* and *value
+constraints*.
+
+| constraint | description
+| ------------- | --------------
+| Limit | A string that specifies a limit for a constraint. Starts with <code>'limit:</code> followed by an Integer and closing single quote, such as ```'limit:1'```.
+| Value | A string that specifies a value for a constraint. To include a list of values, separate the values using commas. To negate the values of a constraint, start with a ```!``` ```.```
+
+You can also control machine diversity using constraints. The below
+constraint ensures that no more than two instances of your job may run
+on a single host. Think of this as a "group by" limit.
+
+ constraints = {
+ 'host': 'limit:2',
+ }
+
+Likewise, you can use constraints to control rack diversity, e.g. at
+most one task per rack:
+
+ constraints = {
+ 'rack': 'limit:1',
+ }
+
+Use these constraints sparingly as they can dramatically reduce Tasks' schedulability.
+
+Template Namespaces
+===================
+
+Currently, a few Pystachio namespaces have special semantics. Using them
+in your configuration allow you to tailor application behavior
+through environment introspection or interact in special ways with the
+Aurora client or Aurora-provided services.
+
+### mesos Namespace
+
+The `mesos` namespace contains the `instance` variable that can be used
+to distinguish between Task replicas.
+
+| variable name | type | description
+| --------------- | :--------: | -------------
+| ```instance``` | Integer | The instance number of the created task. A job with 5 replicas has instance numbers 0, 1, 2, 3, and 4.
+
+### thermos Namespace
+
+The `thermos` namespace contains variables that work directly on the
+Thermos platform in addition to Aurora. This namespace is fully
+compatible with Tasks invoked via the `thermos` CLI.
+
+| variable | type | description |
+| :----------: | --------- | ------------ |
+| ```ports``` | map of string to Integer | A map of names to port numbers |
+| ```task_id``` | string | The task ID assigned to this task. |
+
+The `thermos.ports` namespace is automatically populated by Aurora when
+invoking tasks on Mesos. When running the `thermos` command directly,
+these ports must be explicitly mapped with the `-P` option.
+
+For example, if '{{`thermos.ports[http]`}}' is specified in a `Process`
+configuration, it is automatically extracted and auto-populated by
+Aurora, but must be specified with, for example, `thermos -P http:12345`
+to map `http` to port 12345 when running via the CLI.
+
+Basic Examples
+==============
+
+These are provided to give a basic understanding of simple Aurora jobs.
+
+### hello_world.aurora
+
+Put the following in a file named `hello_world.aurora`, substituting your own values
+for values such as `cluster`s.
+
+ import os
+ hello_world_process = Process(name = 'hello_world', cmdline = 'echo hello world')
+
+ hello_world_task = Task(
+ resources = Resources(cpu = 0.1, ram = 16 * MB, disk = 16 * MB),
+ processes = [hello_world_process])
+
+ hello_world_job = Job(
+ cluster = 'cluster1',
+ role = os.getenv('USER'),
+ task = hello_world_task)
+
+ jobs = [hello_world_job]
+
+Then issue the following commands to create and kill the job, using your own values for the job key.
+
+ aurora create cluster1/$USER/test/hello_world hello_world.aurora
+
+ aurora kill cluster1/$USER/test/hello_world
+
+### Environment Tailoring
+
+#### hello_world_productionized.aurora
+
+Put the following in a file named `hello_world_productionized.aurora`, substituting your own values
+for values such as `cluster`s.
+
+ include('hello_world.aurora')
+
+ production_resources = Resources(cpu = 1.0, ram = 512 * MB, disk = 2 * GB)
+ staging_resources = Resources(cpu = 0.1, ram = 32 * MB, disk = 512 * MB)
+ hello_world_template = hello_world(
+ name = "hello_world-{{cluster}}"
+ task = hello_world(resources=production_resources))
+
+ jobs = [
+ # production jobs
+ hello_world_template(cluster = 'cluster1', instances = 25),
+ hello_world_template(cluster = 'cluster2', instances = 15),
+
+ # staging jobs
+ hello_world_template(
+ cluster = 'local',
+ instances = 1,
+ task = hello_world(resources=staging_resources)),
+ ]
+
+Then issue the following commands to create and kill the job, using your own values for the job key
+
+ aurora create cluster1/$USER/test/hello_world-cluster1 hello_world_productionized.aurora
+
+ aurora kill cluster1/$USER/test/hello_world-cluster1
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/source/documentation/latest/configuration-tutorial.md
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diff --git a/source/documentation/latest/configuration-tutorial.md b/source/documentation/latest/configuration-tutorial.md
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+Aurora Configuration Tutorial
+=============================
+
+How to write Aurora configuration files, including feature descriptions
+and best practices. When writing a configuration file, make use of
+`aurora inspect`. It takes the same job key and configuration file
+arguments as `aurora create` or `aurora update`. It first ensures the
+configuration parses, then outputs it in human-readable form.
+
+You should read this after going through the general [Aurora Tutorial](/documentation/latest/tutorial/).
+
+- [Aurora Configuration Tutorial](#user-content-aurora-configuration-tutorial)
+ - [The Basics](#user-content-the-basics)
+ - [Use Bottom-To-Top Object Ordering](#user-content-use-bottom-to-top-object-ordering)
+ - [An Example Configuration File](#user-content-an-example-configuration-file)
+ - [Defining Process Objects](#user-content-defining-process-objects)
+ - [Getting Your Code Into The Sandbox](#user-content-getting-your-code-into-the-sandbox)
+ - [Defining Task Objects](#user-content-defining-task-objects)
+ - [SequentialTask: Running Processes in Parallel or Sequentially](#user-content-sequentialtask-running-processes-in-parallel-or-sequentially)
+ - [SimpleTask](#user-content-simpletask)
+ - [Combining tasks](#user-content-combining-tasks)
+ - [Defining Job Objects](#user-content-defining-job-objects)
+ - [The jobs List](#user-content-the-jobs-list)
+ - [Templating](#user-content-templating)
+ - [Templating 1: Binding in Pystachio](#user-content-templating-1-binding-in-pystachio)
+ - [Structurals in Pystachio / Aurora](#user-content-structurals-in-pystachio--aurora)
+ - [Mustaches Within Structurals](#user-content-mustaches-within-structurals)
+ - [Templating 2: Structurals Are Factories](#user-content-templating-2-structurals-are-factories)
+ - [A Second Way of Templating](#user-content-a-second-way-of-templating)
+ - [Advanced Binding](#user-content-advanced-binding)
+ - [Bind Syntax](#user-content-bind-syntax)
+ - [Binding Complex Objects](#user-content-binding-complex-objects)
+ - [Lists](#user-content-lists)
+ - [Maps](#user-content-maps)
+ - [Structurals](#user-content-structurals)
+ - [Structural Binding](#user-content-structural-binding)
+ - [Configuration File Writing Tips And Best Practices](#user-content-configuration-file-writing-tips-and-best-practices)
+ - [Use As Few .aurora Files As Possible](#user-content-use-as-few-aurora-files-as-possible)
+ - [Avoid Boilerplate](#user-content-avoid-boilerplate)
+ - [Thermos Uses bash, But Thermos Is Not bash](#user-content-thermos-uses-bash-but-thermos-is-not-bash)
+ - [Bad](#user-content-bad)
+ - [Good](#user-content-good)
+ - [Rarely Use Functions In Your Configurations](#user-content-rarely-use-functions-in-your-configurations)
+ - [Bad](#user-content-bad-1)
+ - [Good](#user-content-good-1)
+
+The Basics
+----------
+
+To run a job on Aurora, you must specify a configuration file that tells
+Aurora what it needs to know to schedule the job, what Mesos needs to
+run the tasks the job is made up of, and what Thermos needs to run the
+processes that make up the tasks. This file must have
+a`.aurora` suffix.
+
+A configuration file defines a collection of objects, along with parameter
+values for their attributes. An Aurora configuration file contains the
+following three types of objects:
+
+- Job
+- Task
+- Process
+
+A configuration also specifies a list of `Job` objects assigned
+to the variable `jobs`.
+
+- jobs (list of defined Jobs to run)
+
+The `.aurora` file format is just Python. However, `Job`, `Task`,
+`Process`, and other classes are defined by a type-checked dictionary
+templating library called *Pystachio*, a powerful tool for
+configuration specification and reuse. Pystachio objects are tailored
+via {{}} surrounded templates.
+
+When writing your `.aurora` file, you may use any Pystachio datatypes, as
+well as any objects shown in the [*Aurora+Thermos Configuration
+Reference*](/documentation/latest/configuration-reference/), without `import` statements - the
+Aurora config loader injects them automatically. Other than that, an `.aurora`
+file works like any other Python script.
+
+[*Aurora+Thermos Configuration Reference*](/documentation/latest/configuration-reference/)
+has a full reference of all Aurora/Thermos defined Pystachio objects.
+
+### Use Bottom-To-Top Object Ordering
+
+A well-structured configuration starts with structural templates (if
+any). Structural templates encapsulate in their attributes all the
+differences between Jobs in the configuration that are not directly
+manipulated at the `Job` level, but typically at the `Process` or `Task`
+level. For example, if certain processes are invoked with slightly
+different settings or input.
+
+After structural templates, define, in order, `Process`es, `Task`s, and
+`Job`s.
+
+Structural template names should be *UpperCamelCased* and their
+instantiations are typically *UPPER\_SNAKE\_CASED*. `Process`, `Task`,
+and `Job` names are typically *lower\_snake\_cased*. Indentation is typically 2
+spaces.
+
+An Example Configuration File
+-----------------------------
+
+The following is a typical configuration file. Don't worry if there are
+parts you don't understand yet, but you may want to refer back to this
+as you read about its individual parts. Note that names surrounded by
+curly braces {{}} are template variables, which the system replaces with
+bound values for the variables.
+
+ # --- templates here ---
+ class Profile(Struct):
+ package_version = Default(String, 'live')
+ java_binary = Default(String, '/usr/lib/jvm/java-1.7.0-openjdk/bin/java')
+ extra_jvm_options = Default(String, '')
+ parent_environment = Default(String, 'prod')
+ parent_serverset = Default(String,
+ '/foocorp/service/bird/{{parent_environment}}/bird')
+
+ # --- processes here ---
+ main = Process(
+ name = 'application',
+ cmdline = '{{profile.java_binary}} -server -Xmx1792m '
+ '{{profile.extra_jvm_options}} '
+ '-jar application.jar '
+ '-upstreamService {{profile.parent_serverset}}'
+ )
+
+ # --- tasks ---
+ base_task = SequentialTask(
+ name = 'application',
+ processes = [
+ Process(
+ name = 'fetch',
+ cmdline = 'curl -O
+ https://packages.foocorp.com/{{profile.package_version}}/application.jar'),
+ ]
+ )
+
+ # not always necessary but often useful to have separate task
+ # resource classes
+ staging_task = base_task(resources =
+ Resources(cpu = 1.0,
+ ram = 2048*MB,
+ disk = 1*GB))
+ production_task = base_task(resources =
+ Resources(cpu = 4.0,
+ ram = 2560*MB,
+ disk = 10*GB))
+
+ # --- job template ---
+ job_template = Job(
+ name = 'application',
+ role = 'myteam',
+ contact = 'myteam-team@foocorp.com',
+ instances = 20,
+ service = True,
+ task = production_task
+ )
+
+ # -- profile instantiations (if any) ---
+ PRODUCTION = Profile()
+ STAGING = Profile(
+ extra_jvm_options = '-Xloggc:gc.log',
+ parent_environment = 'staging'
+ )
+
+ # -- job instantiations --
+ jobs = [
+ job_template(cluster = 'cluster1', environment = 'prod')
+ .bind(profile = PRODUCTION),
+
+ job_template(cluster = 'cluster2', environment = 'prod')
+ .bind(profile = PRODUCTION),
+
+ job_template(cluster = 'cluster1',
+ environment = 'staging',
+ service = False,
+ task = staging_task,
+ instances = 2)
+ .bind(profile = STAGING),
+ ]
+
+## Defining Process Objects
+
+Processes are handled by the Thermos system. A process is a single
+executable step run as a part of an Aurora task, which consists of a
+bash-executable statement.
+
+The key (and required) `Process` attributes are:
+
+- `name`: Any string which is a valid Unix filename (no slashes,
+ NULLs, or leading periods). The `name` value must be unique relative
+ to other Processes in a `Task`.
+- `cmdline`: A command line run in a bash subshell, so you can use
+ bash scripts. Nothing is supplied for command-line arguments,
+ so `$*` is unspecified.
+
+Many tiny processes make managing configurations more difficult. For
+example, the following is a bad way to define processes.
+
+ copy = Process(
+ name = 'copy',
+ cmdline = 'curl -O https://packages.foocorp.com/app.zip'
+ )
+ unpack = Process(
+ name = 'unpack',
+ cmdline = 'unzip app.zip'
+ )
+ remove = Process(
+ name = 'remove',
+ cmdline = 'rm -f app.zip'
+ )
+ run = Process(
+ name = 'app',
+ cmdline = 'java -jar app.jar'
+ )
+ run_task = Task(
+ processes = [copy, unpack, remove, run],
+ constraints = order(copy, unpack, remove, run)
+ )
+
+Since `cmdline` runs in a bash subshell, you can chain commands
+with `&&` or `||`.
+
+When defining a `Task` that is just a list of Processes run in a
+particular order, use `SequentialTask`, as described in the [*Defining*
+`Task` *Objects*](#Task) section. The following simplifies and combines the
+above multiple `Process` definitions into just two.
+
+ stage = Process(
+ name = 'stage',
+ cmdline = 'curl -O https://packages.foocorp.com/app.zip && '
+ 'unzip app.zip && rm -f app.zip')
+
+ run = Process(name = 'app', cmdline = 'java -jar app.jar')
+
+ run_task = SequentialTask(processes = [stage, run])
+
+`Process` also has five optional attributes, each with a default value
+if one isn't specified in the configuration:
+
+- `max_failures`: Defaulting to `1`, the maximum number of failures
+ (non-zero exit statuses) before this `Process` is marked permanently
+ failed and not retried. If a `Process` permanently fails, Thermos
+ checks the `Process` object's containing `Task` for the task's
+ failure limit (usually 1) to determine whether or not the `Task`
+ should be failed. Setting `max_failures`to `0` means that this
+ process will keep retrying until a successful (zero) exit status is
+ achieved. Retries happen at most once every `min_duration` seconds
+ to prevent effectively mounting a denial of service attack against
+ the coordinating scheduler.
+
+- `daemon`: Defaulting to `False`, if `daemon` is set to `True`, a
+ successful (zero) exit status does not prevent future process runs.
+ Instead, the `Process` reinvokes after `min_duration` seconds.
+ However, the maximum failure limit (`max_failures`) still
+ applies. A combination of `daemon=True` and `max_failures=0` retries
+ a `Process` indefinitely regardless of exit status. This should
+ generally be avoided for very short-lived processes because of the
+ accumulation of checkpointed state for each process run. When
+ running in Aurora, `max_failures` is capped at
+ 100.
+
+- `ephemeral`: Defaulting to `False`, if `ephemeral` is `True`, the
+ `Process`' status is not used to determine if its bound `Task` has
+ completed. For example, consider a `Task` with a
+ non-ephemeral webserver process and an ephemeral logsaver process
+ that periodically checkpoints its log files to a centralized data
+ store. The `Task` is considered finished once the webserver process
+ finishes, regardless of the logsaver's current status.
+
+- `min_duration`: Defaults to `15`. Processes may succeed or fail
+ multiple times during a single Task. Each result is called a
+ *process run* and this value is the minimum number of seconds the
+ scheduler waits before re-running the same process.
+
+- `final`: Defaulting to `False`, this is a finalizing `Process` that
+ should run last. Processes can be grouped into two classes:
+ *ordinary* and *finalizing*. By default, Thermos Processes are
+ ordinary. They run as long as the `Task` is considered
+ healthy (i.e. hasn't reached a failure limit). But once all regular
+ Thermos Processes have either finished or the `Task` has reached a
+ certain failure threshold, Thermos moves into a *finalization* stage
+ and runs all finalizing Processes. These are typically necessary for
+ cleaning up after the `Task`, such as log checkpointers, or perhaps
+ e-mail notifications of a completed Task. Finalizing processes may
+ not depend upon ordinary processes or vice-versa, however finalizing
+ processes may depend upon other finalizing processes and will
+ otherwise run as a typical process schedule.
+
+## Getting Your Code Into The Sandbox
+
+When using Aurora, you need to get your executable code into its "sandbox", specifically
+the Task sandbox where the code executes for the Processes that make up that Task.
+
+Each Task has a sandbox created when the Task starts and garbage
+collected when it finishes. All of a Task's processes run in its
+sandbox, so processes can share state by using a shared current
+working directory.
+
+Typically, you save this code somewhere. You then need to define a Process
+in your `.aurora` configuration file that fetches the code from that somewhere
+to where the slave can see it. For a public cloud, that can be anywhere public on
+the Internet, such as S3. For a private cloud internal storage, you need to put in
+on an accessible HDFS cluster or similar storage.
+
+The template for this Process is:
+
+ <name> = Process(
+ name = '<name>'
+ cmdline = '<command to copy and extract code archive into current working directory>'
+ )
+
+Note: Be sure the extracted code archive has an executable.
+
+## Defining Task Objects
+
+Tasks are handled by Mesos. A task is a collection of processes that
+runs in a shared sandbox. It's the fundamental unit Aurora uses to
+schedule the datacenter; essentially what Aurora does is find places
+in the cluster to run tasks.
+
+The key (and required) parts of a Task are:
+
+- `name`: A string giving the Task's name. By default, if a Task is
+ not given a name, it inherits the first name in its Process list.
+
+- `processes`: An unordered list of Process objects bound to the Task.
+ The value of the optional `constraints` attribute affects the
+ contents as a whole. Currently, the only constraint, `order`, determines if
+ the processes run in parallel or sequentially.
+
+- `resources`: A `Resource` object defining the Task's resource
+ footprint. A `Resource` object has three attributes:
+ - `cpu`: A Float, the fractional number of cores the Task
+ requires.
+ - `ram`: An Integer, RAM bytes the Task requires.
+ - `disk`: An integer, disk bytes the Task requires.
+
+A basic Task definition looks like:
+
+ Task(
+ name="hello_world",
+ processes=[Process(name = "hello_world", cmdline = "echo hello world")],
+ resources=Resources(cpu = 1.0,
+ ram = 1*GB,
+ disk = 1*GB))
+
+There are four optional Task attributes:
+
+- `constraints`: A list of `Constraint` objects that constrain the
+ Task's processes. Currently there is only one type, the `order`
+ constraint. For example the following requires that the processes
+ run in the order `foo`, then `bar`.
+
+ constraints = [Constraint(order=['foo', 'bar'])]
+
+ There is an `order()` function that takes `order('foo', 'bar', 'baz')`
+ and converts it into `[Constraint(order=['foo', 'bar', 'baz'])]`.
+ `order()` accepts Process name strings `('foo', 'bar')` or the processes
+ themselves, e.g. `foo=Process(name='foo', ...)`, `bar=Process(name='bar', ...)`,
+ `constraints=order(foo, bar)`
+
+ Note that Thermos rejects tasks with process cycles.
+
+- `max_failures`: Defaulting to `1`, the number of failed processes
+ needed for the `Task` to be marked as failed. Note how this
+ interacts with individual Processes' `max_failures` values. Assume a
+ Task has two Processes and a `max_failures` value of `2`. So both
+ Processes must fail for the Task to fail. Now, assume each of the
+ Task's Processes has its own `max_failures` value of `10`. If
+ Process "A" fails 5 times before succeeding, and Process "B" fails
+ 10 times and is then marked as failing, their parent Task succeeds.
+ Even though there were 15 individual failures by its Processes, only
+ 1 of its Processes was finally marked as failing. Since 1 is less
+ than the 2 that is the Task's `max_failures` value, the Task does
+ not fail.
+
+- `max_concurrency`: Defaulting to `0`, the maximum number of
+ concurrent processes in the Task. `0` specifies unlimited
+ concurrency. For Tasks with many expensive but otherwise independent
+ processes, you can limit the amount of concurrency Thermos schedules
+ instead of artificially constraining them through `order`
+ constraints. For example, a test framework may generate a Task with
+ 100 test run processes, but runs it in a Task with
+ `resources.cpus=4`. Limit the amount of parallelism to 4 by setting
+ `max_concurrency=4`.
+
+- `finalization_wait`: Defaulting to `30`, the number of seconds
+ allocated for finalizing the Task's processes. A Task starts in
+ `ACTIVE` state when Processes run and stays there as long as the Task
+ is healthy and Processes run. When all Processes finish successfully
+ or the Task reaches its maximum process failure limit, it goes into
+ `CLEANING` state. In `CLEANING`, it sends `SIGTERMS` to any still running
+ Processes. When all Processes terminate, the Task goes into
+ `FINALIZING` state and invokes the schedule of all processes whose
+ final attribute has a True value. Everything from the end of `ACTIVE`
+ to the end of `FINALIZING` must happen within `finalization_wait`
+ number of seconds. If not, all still running Processes are sent
+ `SIGKILL`s (or if dependent on yet to be completed Processes, are
+ never invoked).
+
+### SequentialTask: Running Processes in Parallel or Sequentially
+
+By default, a Task with several Processes runs them in parallel. There
+are two ways to run Processes sequentially:
+
+- Include an `order` constraint in the Task definition's `constraints`
+ attribute whose arguments specify the processes' run order:
+
+ Task( ... processes=[process1, process2, process3],
+ constraints = order(process1, process2, process3), ...)
+
+- Use `SequentialTask` instead of `Task`; it automatically runs
+ processes in the order specified in the `processes` attribute. No
+ `constraint` parameter is needed:
+
+ SequentialTask( ... processes=[process1, process2, process3] ...)
+
+### SimpleTask
+
+For quickly creating simple tasks, use the `SimpleTask` helper. It
+creates a basic task from a provided name and command line using a
+default set of resources. For example, in a .`aurora` configuration
+file:
+
+ SimpleTask(name="hello_world", command="echo hello world")
+
+is equivalent to
+
+ Task(name="hello_world",
+ processes=[Process(name = "hello_world", cmdline = "echo hello world")],
+ resources=Resources(cpu = 1.0,
+ ram = 1*GB,
+ disk = 1*GB))
+
+The simplest idiomatic Job configuration thus becomes:
+
+ import os
+ hello_world_job = Job(
+ task=SimpleTask(name="hello_world", command="echo hello world"),
+ role=os.getenv('USER'),
+ cluster="cluster1")
+
+When written to `hello_world.aurora`, you invoke it with a simple
+`aurora create cluster1/$USER/test/hello_world hello_world.aurora`.
+
+### Combining tasks
+
+`Tasks.concat`(synonym,`concat_tasks`) and
+`Tasks.combine`(synonym,`combine_tasks`) merge multiple Task definitions
+into a single Task. It may be easier to define complex Jobs
+as smaller constituent Tasks. But since a Job only includes a single
+Task, the subtasks must be combined before using them in a Job.
+Smaller Tasks can also be reused between Jobs, instead of having to
+repeat their definition for multiple Jobs.
+
+With both methods, the merged Task takes the first Task's name. The
+difference between the two is the result Task's process ordering.
+
+- `Tasks.combine` runs its subtasks' processes in no particular order.
+ The new Task's resource consumption is the sum of all its subtasks'
+ consumption.
+
+- `Tasks.concat` runs its subtasks in the order supplied, with each
+ subtask's processes run serially between tasks. It is analogous to
+ the `order` constraint helper, except at the Task level instead of
+ the Process level. The new Task's resource consumption is the
+ maximum value specified by any subtask for each Resource attribute
+ (cpu, ram and disk).
+
+For example, given the following:
+
+ setup_task = Task(
+ ...
+ processes=[download_interpreter, update_zookeeper],
+ # It is important to note that {{Tasks.concat}} has
+ # no effect on the ordering of the processes within a task;
+ # hence the necessity of the {{order}} statement below
+ # (otherwise, the order in which {{download_interpreter}}
+ # and {{update_zookeeper}} run will be non-deterministic)
+ constraints=order(download_interpreter, update_zookeeper),
+ ...
+ )
+
+ run_task = SequentialTask(
+ ...
+ processes=[download_application, start_application],
+ ...
+ )
+
+ combined_task = Tasks.concat(setup_task, run_task)
+
+The `Tasks.concat` command merges the two Tasks into a single Task and
+ensures all processes in `setup_task` run before the processes
+in `run_task`. Conceptually, the task is reduced to:
+
+ task = Task(
+ ...
+ processes=[download_interpreter, update_zookeeper,
+ download_application, start_application],
+ constraints=order(download_interpreter, update_zookeeper,
+ download_application, start_application),
+ ...
+ )
+
+In the case of `Tasks.combine`, the two schedules run in parallel:
+
+ task = Task(
+ ...
+ processes=[download_interpreter, update_zookeeper,
+ download_application, start_application],
+ constraints=order(download_interpreter, update_zookeeper) +
+ order(download_application, start_application),
+ ...
+ )
+
+In the latter case, each of the two sequences may operate in parallel.
+Of course, this may not be the intended behavior (for example, if
+the `start_application` Process implicitly relies
+upon `download_interpreter`). Make sure you understand the difference
+between using one or the other.
+
+## Defining Job Objects
+
+A job is a group of identical tasks that Aurora can run in a Mesos cluster.
+
+A `Job` object is defined by the values of several attributes, some
+required and some optional. The required attributes are:
+
+- `task`: Task object to bind to this job. Note that a Job can
+ only take a single Task.
+
+- `role`: Job's role account; in other words, the user account to run
+ the job as on a Mesos cluster machine. A common value is
+ `os.getenv('USER')`; using a Python command to get the user who
+ submits the job request. The other common value is the service
+ account that runs the job, e.g. `www-data`.
+
+- `environment`: Job's environment, typical values
+ are `devel`, `test`, or `prod`.
+
+- `cluster`: Aurora cluster to schedule the job in, defined in
+ `/etc/aurora/clusters.json` or `~/.clusters.json`. You can specify
+ jobs where the only difference is the `cluster`, then at run time
+ only run the Job whose job key includes your desired cluster's name.
+
+You usually see a `name` parameter. By default, `name` inherits its
+value from the Job's associated Task object, but you can override this
+default. For these four parameters, a Job definition might look like:
+
+ foo_job = Job( name = 'foo', cluster = 'cluster1',
+ role = os.getenv('USER'), environment = 'prod',
+ task = foo_task)
+
+In addition to the required attributes, there are several optional
+attributes. The first (strongly recommended) optional attribute is:
+
+- `contact`: An email address for the Job's owner. For production
+ jobs, it is usually a team mailing list.
+
+Two more attributes deal with how to handle failure of the Job's Task:
+
+- `max_task_failures`: An integer, defaulting to `1`, of the maximum
+ number of Task failures after which the Job is considered failed.
+ `-1` allows for infinite failures.
+
+- `service`: A boolean, defaulting to `False`, which if `True`
+ restarts tasks regardless of whether they succeeded or failed. In
+ other words, if `True`, after the Job's Task completes, it
+ automatically starts again. This is for Jobs you want to run
+ continuously, rather than doing a single run.
+
+Three attributes deal with configuring the Job's Task:
+
+- `instances`: Defaulting to `1`, the number of
+ instances/replicas/shards of the Job's Task to create.
+
+- `priority`: Defaulting to `0`, the Job's Task's preemption priority,
+ for which higher values may preempt Tasks from Jobs with lower
+ values.
+
+- `production`: a Boolean, defaulting to `False`, specifying that this
+ is a production job backed by quota. Tasks from production Jobs may
+ preempt tasks from any non-production job, and may only be preempted
+ by tasks from production jobs in the same role with higher
+ priority. **WARNING**: To run Jobs at this level, the Job role must
+ have the appropriate quota.
+
+The final three Job attributes each take an object as their value.
+
+- `update_config`: An `UpdateConfig`
+ object provides parameters for controlling the rate and policy of
+ rolling updates. The `UpdateConfig` parameters are:
+ - `batch_size`: An integer, defaulting to `1`, specifying the
+ maximum number of shards to update in one iteration.
+ - `restart_threshold`: An integer, defaulting to `60`, specifying
+ the maximum number of seconds before a shard must move into the
+ `RUNNING` state before considered a failure.
+ - `watch_secs`: An integer, defaulting to `45`, specifying the
+ minimum number of seconds a shard must remain in the `RUNNING`
+ state before considered a success.
+ - `max_per_shard_failures`: An integer, defaulting to `0`,
+ specifying the maximum number of restarts per shard during an
+ update. When the limit is exceeded, it increments the total
+ failure count.
+ - `max_total_failures`: An integer, defaulting to `0`, specifying
+ the maximum number of shard failures tolerated during an update.
+ Cannot be equal to or greater than the job's total number of
+ tasks.
+- `health_check_config`: A `HealthCheckConfig` object that provides
+ parameters for controlling a Task's health checks via HTTP. Only
+ used if a health port was assigned with a command line wildcard. The
+ `HealthCheckConfig` parameters are:
+ - `initial_interval_secs`: An integer, defaulting to `15`,
+ specifying the initial delay for doing an HTTP health check.
+ - `interval_secs`: An integer, defaulting to `10`, specifying the
+ number of seconds in the interval between checking the Task's
+ health.
+ - `timeout_secs`: An integer, defaulting to `1`, specifying the
+ number of seconds the application must respond to an HTTP health
+ check with `OK` before it is considered a failure.
+ - `max_consecutive_failures`: An integer, defaulting to `0`,
+ specifying the maximum number of consecutive failures before a
+ task is unhealthy.
+- `constraints`: A `dict` Python object, specifying Task scheduling
+ constraints. Most users will not need to specify constraints, as the
+ scheduler automatically inserts reasonable defaults. Please do not
+ set this field unless you are sure of what you are doing. See the
+ section in the Aurora + Thermos Reference manual on [Specifying
+ Scheduling Constraints](/documentation/latest/configuration-reference/) for more information.
+
+## The jobs List
+
+At the end of your `.aurora` file, you need to specify a list of the
+file's defined Jobs to run in the order listed. For example, the
+following runs first `job1`, then `job2`, then `job3`.
+
+jobs = [job1, job2, job3]
+
+Templating
+----------
+
+The `.aurora` file format is just Python. However, `Job`, `Task`,
+`Process`, and other classes are defined by a templating library called
+*Pystachio*, a powerful tool for configuration specification and reuse.
+
+[Aurora+Thermos Configuration Reference](/documentation/latest/configuration-reference/)
+has a full reference of all Aurora/Thermos defined Pystachio objects.
+
+When writing your `.aurora` file, you may use any Pystachio datatypes, as
+well as any objects shown in the *Aurora+Thermos Configuration
+Reference* without `import` statements - the Aurora config loader
+injects them automatically. Other than that the `.aurora` format
+works like any other Python script.
+
+### Templating 1: Binding in Pystachio
+
+Pystachio uses the visually distinctive {{}} to indicate template
+variables. These are often called "mustache variables" after the
+similarly appearing variables in the Mustache templating system and
+because the curly braces resemble mustaches.
+
+If you are familiar with the Mustache system, templates in Pystachio
+have significant differences. They have no nesting, joining, or
+inheritance semantics. On the other hand, when evaluated, templates
+are evaluated iteratively, so this affords some level of indirection.
+
+Let's start with the simplest template; text with one
+variable, in this case `name`;
+
+ Hello {{name}}
+
+If we evaluate this as is, we'd get back:
+
+ Hello
+
+If a template variable doesn't have a value, when evaluated it's
+replaced with nothing. If we add a binding to give it a value:
+
+ { "name" : "Tom" }
+
+We'd get back:
+
+ Hello Tom
+
+We can also use {{}} variables as sectional variables. Let's say we
+have:
+
+ {{#x}} Testing... {{/x}}
+
+If `x` evaluates to `True`, the text between the sectional tags is
+shown. If there is no value for `x` or it evaluates to `False`, the
+between tags text is not shown. So, at a basic level, a sectional
+variable acts as a conditional.
+
+However, if the sectional variable evaluates to a list, array, etc. it
+acts as a `foreach`. For example,
+
+ {{#x}} {{name}} {{/x}}
+
+with
+
+ { "x": [ { "name" : "tic" } { "name" : "tac" } { "name" : "toe" } ] }
+
+evaluates to
+
+ tic tac toe
+
+Every Pystachio object has an associated `.bind` method that can bind
+values to {{}} variables. Bindings are not immediately evaluated.
+Instead, they are evaluated only when the interpolated value of the
+object is necessary, e.g. for performing equality or serializing a
+message over the wire.
+
+Objects with and without mustache templated variables behave
+differently:
+
+ >>> Float(1.5)
+ Float(1.5)
+
+ >>> Float('{{x}}.5')
+ Float({{x}}.5)
+
+ >>> Float('{{x}}.5').bind(x = 1)
+ Float(1.5)
+
+ >>> Float('{{x}}.5').bind(x = 1) == Float(1.5)
+ True
+
+ >>> contextual_object = String('{{metavar{{number}}}}').bind(
+ ... metavar1 = "first", metavar2 = "second")
+
+ >>> contextual_object
+ String({{metavar{{number}}}})
+
+ >>> contextual_object.bind(number = 1)
+ String(first)
+
+ >>> contextual_object.bind(number = 2)
+ String(second)
+
+You usually bind simple key to value pairs, but you can also bind three
+other objects: lists, dictionaries, and structurals. These will be
+described in detail later.
+
+### Structurals in Pystachio / Aurora
+
+Most Aurora/Thermos users don't ever (knowingly) interact with `String`,
+`Float`, or `Integer` Pystashio objects directly. Instead they interact
+with derived structural (`Struct`) objects that are collections of
+fundamental and structural objects. The structural object components are
+called *attributes*. Aurora's most used structural objects are `Job`,
+`Task`, and `Process`:
+
+ class Process(Struct):
+ cmdline = Required(String)
+ name = Required(String)
+ max_failures = Default(Integer, 1)
+ daemon = Default(Boolean, False)
+ ephemeral = Default(Boolean, False)
+ min_duration = Default(Integer, 5)
+ final = Default(Boolean, False)
+
+Construct default objects by following the object's type with (). If you
+want an attribute to have a value different from its default, include
+the attribute name and value inside the parentheses.
+
+ >>> Process()
+ Process(daemon=False, max_failures=1, ephemeral=False,
+ min_duration=5, final=False)
+
+Attribute values can be template variables, which then receive specific
+values when creating the object.
+
+ >>> Process(cmdline = 'echo {{message}}')
+ Process(daemon=False, max_failures=1, ephemeral=False, min_duration=5,
+ cmdline=echo {{message}}, final=False)
+
+ >>> Process(cmdline = 'echo {{message}}').bind(message = 'hello world')
+ Process(daemon=False, max_failures=1, ephemeral=False, min_duration=5,
+ cmdline=echo hello world, final=False)
+
+A powerful binding property is that all of an object's children inherit its
+bindings:
+
+ >>> List(Process)([
+ ... Process(name = '{{prefix}}_one'),
+ ... Process(name = '{{prefix}}_two')
+ ... ]).bind(prefix = 'hello')
+ ProcessList(
+ Process(daemon=False, name=hello_one, max_failures=1, ephemeral=False, min_duration=5, final=False),
+ Process(daemon=False, name=hello_two, max_failures=1, ephemeral=False, min_duration=5, final=False)
+ )
+
+Remember that an Aurora Job contains Tasks which contain Processes. A
+Job level binding is inherited by its Tasks and all their Processes.
+Similarly a Task level binding is available to that Task and its
+Processes but is *not* visible at the Job level (inheritance is a
+one-way street.)
+
+#### Mustaches Within Structurals
+
+When you define a `Struct` schema, one powerful, but confusing, feature
+is that all of that structure's attributes are Mustache variables within
+the enclosing scope *once they have been populated*.
+
+For example, when `Process` is defined above, all its attributes such as
+{{`name`}}, {{`cmdline`}}, {{`max_failures`}} etc., are all immediately
+defined as Mustache variables, implicitly bound into the `Process`, and
+inherit all child objects once they are defined.
+
+Thus, you can do the following:
+
+ >>> Process(name = "installer", cmdline = "echo {{name}} is running")
+ Process(daemon=False, name=installer, max_failures=1, ephemeral=False, min_duration=5,
+ cmdline=echo installer is running, final=False)
+
+WARNING: This binding only takes place in one direction. For example,
+the following does NOT work and does not set the `Process` `name`
+attribute's value.
+
+ >>> Process().bind(name = "installer")
+ Process(daemon=False, max_failures=1, ephemeral=False, min_duration=5, final=False)
+
+The following is also not possible and results in an infinite loop that
+attempts to resolve `Process.name`.
+
+ >>> Process(name = '{{name}}').bind(name = 'installer')
+
+Do not confuse Structural attributes with bound Mustache variables.
+Attributes are implicitly converted to Mustache variables but not vice
+versa.
+
+### Templating 2: Structurals Are Factories
+
+#### A Second Way of Templating
+
+A second templating method is both as powerful as the aforementioned and
+often confused with it. This method is due to automatic conversion of
+Struct attributes to Mustache variables as described above.
+
+Suppose you create a Process object:
+
+ >>> p = Process(name = "process_one", cmdline = "echo hello world")
+
+ >>> p
+ Process(daemon=False, name=process_one, max_failures=1, ephemeral=False, min_duration=5,
+ cmdline=echo hello world, final=False)
+
+This `Process` object, "`p`", can be used wherever a `Process` object is
+needed. It can also be reused by changing the value(s) of its
+attribute(s). Here we change its `name` attribute from `process_one` to
+`process_two`.
+
+ >>> p(name = "process_two")
+ Process(daemon=False, name=process_two, max_failures=1, ephemeral=False, min_duration=5,
+ cmdline=echo hello world, final=False)
+
+Template creation is a common use for this technique:
+
+ >>> Daemon = Process(daemon = True)
+ >>> logrotate = Daemon(name = 'logrotate', cmdline = './logrotate conf/logrotate.conf')
+ >>> mysql = Daemon(name = 'mysql', cmdline = 'bin/mysqld --safe-mode')
+
+### Advanced Binding
+
+As described above, `.bind()` binds simple strings or numbers to
+Mustache variables. In addition to Structural types formed by combining
+atomic types, Pystachio has two container types; `List` and `Map` which
+can also be bound via `.bind()`.
+
+#### Bind Syntax
+
+The `bind()` function can take Python dictionaries or `kwargs`
+interchangeably (when "`kwargs`" is in a function definition, `kwargs`
+receives a Python dictionary containing all keyword arguments after the
+formal parameter list).
+
+ >>> String('{{foo}}').bind(foo = 'bar') == String('{{foo}}').bind({'foo': 'bar'})
+ True
+
+Bindings done "closer" to the object in question take precedence:
+
+ >>> p = Process(name = '{{context}}_process')
+ >>> t = Task().bind(context = 'global')
+ >>> t(processes = [p, p.bind(context = 'local')])
+ Task(processes=ProcessList(
+ Process(daemon=False, name=global_process, max_failures=1, ephemeral=False, final=False,
+ min_duration=5),
+ Process(daemon=False, name=local_process, max_failures=1, ephemeral=False, final=False,
+ min_duration=5)
+ ))
+
+#### Binding Complex Objects
+
+##### Lists
+
+ >>> fibonacci = List(Integer)([1, 1, 2, 3, 5, 8, 13])
+ >>> String('{{fib[4]}}').bind(fib = fibonacci)
+ String(5)
+
+##### Maps
+
+ >>> first_names = Map(String, String)({'Kent': 'Clark', 'Wayne': 'Bruce', 'Prince': 'Diana'})
+ >>> String('{{first[Kent]}}').bind(first = first_names)
+ String(Clark)
+
+##### Structurals
+
+ >>> String('{{p.cmdline}}').bind(p = Process(cmdline = "echo hello world"))
+ String(echo hello world)
+
+### Structural Binding
+
+Use structural templates when binding more than two or three individual
+values at the Job or Task level. For fewer than two or three, standard
+key to string binding is sufficient.
+
+Structural binding is a very powerful pattern and is most useful in
+Aurora/Thermos for doing Structural configuration. For example, you can
+define a job profile. The following profile uses `HDFS`, the Hadoop
+Distributed File System, to designate a file's location. `HDFS` does
+not come with Aurora, so you'll need to either install it separately
+or change the way the dataset is designated.
+
+ class Profile(Struct):
+ version = Required(String)
+ environment = Required(String)
+ dataset = Default(String, hdfs://home/aurora/data/{{environment}}')
+
+ PRODUCTION = Profile(version = 'live', environment = 'prod')
+ DEVEL = Profile(version = 'latest',
+ environment = 'devel',
+ dataset = 'hdfs://home/aurora/data/test')
+ TEST = Profile(version = 'latest', environment = 'test')
+
+ JOB_TEMPLATE = Job(
+ name = 'application',
+ role = 'myteam',
+ cluster = 'cluster1',
+ environment = '{{profile.environment}}',
+ task = SequentialTask(
+ name = 'task',
+ resources = Resources(cpu = 2, ram = 4*GB, disk = 8*GB),
+ processes = [
+ Process(name = 'main', cmdline = 'java -jar application.jar -hdfsPath
+ {{profile.dataset}}')
+ ]
+ )
+ )
+
+ jobs = [
+ JOB_TEMPLATE(instances = 100).bind(profile = PRODUCTION),
+ JOB_TEMPLATE.bind(profile = DEVEL),
+ JOB_TEMPLATE.bind(profile = TEST),
+ ]
+
+In this case, a custom structural "Profile" is created to self-document
+the configuration to some degree. This also allows some schema
+"type-checking", and for default self-substitution, e.g. in
+`Profile.dataset` above.
+
+So rather than a `.bind()` with a half-dozen substituted variables, you
+can bind a single object that has sensible defaults stored in a single
+place.
+
+Configuration File Writing Tips And Best Practices
+--------------------------------------------------
+
+### Use As Few .aurora Files As Possible
+
+When creating your `.aurora` configuration, try to keep all versions of
+a particular job within the same `.aurora` file. For example, if you
+have separate jobs for `cluster1`, `cluster1` staging, `cluster1`
+testing, and`cluster2`, keep them as close together as possible.
+
+Constructs shared across multiple jobs owned by your team (e.g.
+team-level defaults or structural templates) can be split into separate
+`.aurora`files and included via the `include` directive.
+
+### Avoid Boilerplate
+
+If you see repetition or find yourself copy and pasting any parts of
+your configuration, it's likely an opportunity for templating. Take the
+example below:
+
+`redundant.aurora` contains:
+
+ download = Process(
+ name = 'download',
+ cmdline = 'wget http://www.python.org/ftp/python/2.7.3/Python-2.7.3.tar.bz2',
+ max_failures = 5,
+ min_duration = 1)
+
+ unpack = Process(
+ name = 'unpack',
+ cmdline = 'rm -rf Python-2.7.3 && tar xzf Python-2.7.3.tar.bz2',
+ max_failures = 5,
+ min_duration = 1)
+
+ build = Process(
+ name = 'build',
+ cmdline = 'pushd Python-2.7.3 && ./configure && make && popd',
+ max_failures = 1)
+
+ email = Process(
+ name = 'email',
+ cmdline = 'echo Success | mail feynman@tmc.com',
+ max_failures = 5,
+ min_duration = 1)
+
+ build_python = Task(
+ name = 'build_python',
+ processes = [download, unpack, build, email],
+ constraints = [Constraint(order = ['download', 'unpack', 'build', 'email'])])
+
+As you'll notice, there's a lot of repetition in the `Process`
+definitions. For example, almost every process sets a `max_failures`
+limit to 5 and a `min_duration` to 1. This is an opportunity for factoring
+into a common process template.
+
+Furthermore, the Python version is repeated everywhere. This can be
+bound via structural templating as described in the [Advanced Binding](#AdvancedBinding)
+section.
+
+`less_redundant.aurora` contains:
+
+ class Python(Struct):
+ version = Required(String)
+ base = Default(String, 'Python-{{version}}')
+ package = Default(String, '{{base}}.tar.bz2')
+
+ ReliableProcess = Process(
+ max_failures = 5,
+ min_duration = 1)
+
+ download = ReliableProcess(
+ name = 'download',
+ cmdline = 'wget http://www.python.org/ftp/python/{{python.version}}/{{python.package}}')
+
+ unpack = ReliableProcess(
+ name = 'unpack',
+ cmdline = 'rm -rf {{python.base}} && tar xzf {{python.package}}')
+
+ build = ReliableProcess(
+ name = 'build',
+ cmdline = 'pushd {{python.base}} && ./configure && make && popd',
+ max_failures = 1)
+
+ email = ReliableProcess(
+ name = 'email',
+ cmdline = 'echo Success | mail {{role}}@foocorp.com')
+
+ build_python = SequentialTask(
+ name = 'build_python',
+ processes = [download, unpack, build, email]).bind(python = Python(version = "2.7.3"))
+
+### Thermos Uses bash, But Thermos Is Not bash
+
+#### Bad
+
+Many tiny Processes makes for harder to manage configurations.
+
+ copy = Process(
+ name = 'copy',
+ cmdline = 'rcp user@my_machine:my_application .'
+ )
+
+ unpack = Process(
+ name = 'unpack',
+ cmdline = 'unzip app.zip'
+ )
+
+ remove = Process(
+ name = 'remove',
+ cmdline = 'rm -f app.zip'
+ )
+
+ run = Process(
+ name = 'app',
+ cmdline = 'java -jar app.jar'
+ )
+
+ run_task = Task(
+ processes = [copy, unpack, remove, run],
+ constraints = order(copy, unpack, remove, run)
+ )
+
+#### Good
+
+Each `cmdline` runs in a bash subshell, so you have the full power of
+bash. Chaining commands with `&&` or `||` is almost always the right
+thing to do.
+
+Also for Tasks that are simply a list of processes that run one after
+another, consider using the `SequentialTask` helper which applies a
+linear ordering constraint for you.
+
+ stage = Process(
+ name = 'stage',
+ cmdline = 'rcp user@my_machine:my_application . && unzip app.zip && rm -f app.zip')
+
+ run = Process(name = 'app', cmdline = 'java -jar app.jar')
+
+ run_task = SequentialTask(processes = [stage, run])
+
+### Rarely Use Functions In Your Configurations
+
+90% of the time you define a function in a `.aurora` file, you're
+probably Doing It Wrong(TM).
+
+#### Bad
+
+ def get_my_task(name, user, cpu, ram, disk):
+ return Task(
+ name = name,
+ user = user,
+ processes = [STAGE_PROCESS, RUN_PROCESS],
+ constraints = order(STAGE_PROCESS, RUN_PROCESS),
+ resources = Resources(cpu = cpu, ram = ram, disk = disk)
+ )
+
+ task_one = get_my_task('task_one', 'feynman', 1.0, 32*MB, 1*GB)
+ task_two = get_my_task('task_two', 'feynman', 2.0, 64*MB, 1*GB)
+
+#### Good
+
+This one is more idiomatic. Forced keyword arguments prevents accidents,
+e.g. constructing a task with "32*MB" when you mean 32MB of ram and not
+disk. Less proliferation of task-construction techniques means
+easier-to-read, quicker-to-understand, and a more composable
+configuration.
+
+ TASK_TEMPLATE = SequentialTask(
+ user = 'wickman',
+ processes = [STAGE_PROCESS, RUN_PROCESS],
+ )
+
+ task_one = TASK_TEMPLATE(
+ name = 'task_one',
+ resources = Resources(cpu = 1.0, ram = 32*MB, disk = 1*GB) )
+
+ task_two = TASK_TEMPLATE(
+ name = 'task_two',
+ resources = Resources(cpu = 2.0, ram = 64*MB, disk = 1*GB)
+ )
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/source/documentation/latest/contributing.md
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diff --git a/source/documentation/latest/contributing.md b/source/documentation/latest/contributing.md
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+Get the Source Code
+-------------------
+First things first, you'll need the source! The Aurora source is available from Apache git:
+
+ git clone https://git-wip-us.apache.org/repos/asf/incubator-aurora
+
+Find Something to Do
+--------------------
+There are issues in [Jira](https://issues.apache.org/jira/browse/AURORA) with the
+["newbie" tag](https://issues.apache.org/jira/browse/AURORA-189?jql=project%20%3D%20AURORA%20AND%20resolution%20%3D%20Unresolved%20AND%20labels%20%3D%20newbie%20ORDER%20BY%20priority%20DESC)
+that are good starting places for new Aurora contributors; pick one of these and dive in! Once
+you've got a patch, the next step is to post a review.
+
+Getting your ReviewBoard Account
+--------------------------------
+Go to https://reviews.apache.org and create an account.
+
+Setting up your ReviewBoard Environment
+---------------------------------------
+Run `./rbt status`. The first time this runs it will bootstrap and you will be asked to login.
+Subsequent runs will cache your login credentials.
+
+Submitting a Patch for Review
+-----------------------------
+Post a review with `rbt`, fill out the fields in your browser and hit Publish.
+
+ ./rbt post -o
+
+Once you've done this, you probably want to mark the associated Jira issue as Reviewable.
+
+Updating an Existing Review
+---------------------------
+Incorporate review feedback, make some more commits, update your existing review, fill out the
+fields in your browser and hit Publish.
+
+ ./rbt post -o -r <RB_ID>
+
+Merging Your Own Review (Committers)
+------------------------------------
+Once you have shipits from the right committers, merge your changes in a single commit and mark
+the review as submitted. The typical workflow is:
+
+ git checkout master
+ git pull origin master
+ ./rbt patch -c <RB_ID> # Verify the automatically-generated commit message looks sane,
+ # editing if necessary.
+ git show master # Verify everything looks sane
+ git push origin master
+ ./rbt close <RB_ID>
+
+Note that even if you're developing using feature branches you will not use `git merge` - each
+commit will be an atomic change accompanied by a ReviewBoard entry.
+
+Merging Someone Else's Review
+-----------------------------
+Sometimes you'll need to merge someone else's RB. The typical workflow for this is
+
+ git checkout master
+ git pull origin master
+ ./rbt patch -c <RB_ID>
+ git show master # Verify everything looks sane, author is correct
+ git push origin master
+
+Cleaning Up
+-----------
+Your patch has landed, congratulations! The last thing you'll want to do before moving on to your
+next fix is to clean up your Jira and Reviewboard. The former of which should be marked as
+"Resolved" while the latter should be marked as "Submitted".
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/source/documentation/latest/cron-jobs.md
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+# Cron Jobs
+
+Aurora supports execution of scheduled jobs on a Mesos cluster using cron-style syntax.
+
+- [Overview](#overview)
+- [Collision Policies](#collision-policies)
+ - [KILL_EXISTING](#kill_existing)
+ - [CANCEL_NEW](#cancel_new)
+- [Failure recovery](#failure-recovery)
+- [Interacting with cron jobs via the Aurora CLI](#interacting-with-cron-jobs-via-the-aurora-cli)
+ - [cron schedule](#cron-schedule)
+ - [cron deschedule](#cron-deschedule)
+ - [cron start](#cron-start)
+ - [job killall, job restart, job kill](#job-killall-job-restart-job-kill)
+- [Technical Note About Syntax](#technical-note-about-syntax)
+- [Caveats](#caveats)
+ - [Failovers](#failovers)
+ - [Collision policy is best-effort](#collision-policy-is-best-effort)
+ - [Timezone Configuration](#timezone-configuration)
+
+## Overview
+
+A job is identified as a cron job by the presence of a
+`cron_schedule` attribute containing a cron-style schedule in the
+[`Job`](configuration-reference.md#job-objects) object. Examples of cron schedules
+include "every 5 minutes" (`*/5 * * * *`), "Fridays at 17:00" (`* 17 * * FRI`), and
+"the 1st and 15th day of the month at 03:00" (`0 3 1,15 *`).
+
+Example (available in the [Vagrant environment](/documentation/latest/vagrant/)):
+
+ $ cat /vagrant/examples/job/cron_hello_world.aurora
+ # cron_hello_world.aurora
+ # A cron job that runs every 5 minutes.
+ jobs = [
+ Job(
+ cluster = 'devcluster',
+ role = 'www-data',
+ environment = 'test',
+ name = 'cron_hello_world',
+ cron_schedule = '*/5 * * * *',
+ task = SimpleTask(
+ 'cron_hello_world',
+ 'echo "Hello world from cron, the time is now $(date --rfc-822)"'),
+ ),
+ ]
+
+## Collision Policies
+
+The `cron_collision_policy` field specifies the scheduler's behavior when a new cron job is
+triggered while an older run hasn't finished. The scheduler has two policies available,
+[KILL_EXISTING](#kill_existing) and [CANCEL_NEW](#cancel_new).
+
+### KILL_EXISTING
+
+The default policy - on a collision the old instances are killed and a instances with the current
+configuration are started.
+
+### CANCEL_NEW
+
+On a collision the new run is cancelled.
+
+Note that the use of this flag is likely a code smell - interrupted cron jobs should be able
+to recover their progress on a subsequent invocation, otherwise they risk having their work queue
+grow faster than they can process it.
+
+## Failure recovery
+
+Unlike with services, which aurora will always re-execute regardless of exit status, instances of
+cron jobs retry according to the `max_task_failures` attribute of the
+[Task](configuration-reference.md#task-objects) object. To get "run-until-failure" semantics,
+set `max_task_failures` to `-1`.
+
+## Interacting with cron jobs via the Aurora CLI
+
+Most interaction with cron jobs takes place using the `cron` subcommand. See `aurora2 help cron`
+for up-to-date usage instructions.
+
+### cron schedule
+Schedules a new cron job on the Aurora cluster for later runs or replaces the existing cron template
+with a new one. Only future runs will be affected, any existing active tasks are left intact.
+
+ $ aurora2 cron schedule devcluster/www-data/test/cron_hello_world /vagrant/examples/jobs/cron_hello_world.aurora
+
+### cron deschedule
+Deschedules a cron job, preventing future runs but allowing current runs to complete.
+
+ $ aurora2 cron deschedule devcluster/www-data/test/cron_hello_world
+
+### cron start
+Start a cron job immediately, outside of its normal cron schedule.
+
+ $ aurora2 cron start devcluster/www-data/test/cron_hello_world
+
+### job killall, job restart, job kill
+Cron jobs create instances running on the cluster that you can interact with like normal Aurora
+tasks with `job kill` and `job restart`.
+
+## Technical Note About Syntax
+
+`cron_schedule` uses a restricted subset of BSD crontab syntax. While the
+execution engine currently uses Quartz, the schedule parsing is custom, a subset of FreeBSD
+[crontab(5)](http://www.freebsd.org/cgi/man.cgi?crontab(5)) syntax. See
+[the source](https://github.com/apache/incubator-aurora/blob/master/src/main/java/org/apache/aurora/scheduler/cron/CrontabEntry.java#L106-L124)
+for details.
+
+## Caveats
+
+### Failovers
+No failover recovery. Aurora does not record the latest minute it fired
+triggers for across failovers. Therefore it's possible to miss triggers
+on failover. Note that this behavior may change in the future.
+
+It's necessary to sync time between schedulers with something like `ntpd`.
+Clock skew could cause double or missed triggers in the case of a failover.
+
+### Collision policy is best-effort
+Aurora aims to always have *at least one copy* of a given instance running at a time - it's
+an AP system, meaning it chooses Availability and Partition Tolerance at the expense of
+Consistency.
+
+If your collision policy was `CANCEL_NEW` and a task has terminated but
+Aurora has not noticed this Aurora will go ahead and create your new
+task.
+
+If your collision policy was `KILL_EXISTING` and a task was marked `LOST`
+but not yet GCed Aurora will go ahead and create your new task without
+attempting to kill the old one (outside the GC interval).
+
+### Timezone Configuration
+Cron timezone is configured indepdendently of JVM timezone with the `-cron_timezone` flag and
+defaults to UTC.
[10/18] incubator-aurora-website git commit: Initial move of website
over to git
Posted by jf...@apache.org.
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/publish/documentation/latest/monitoring/index.html
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diff --git a/publish/documentation/latest/monitoring/index.html b/publish/documentation/latest/monitoring/index.html
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+<!DOCTYPE html>
+<html lang="en">
+ <head>
+ <meta charset="utf-8">
+ <meta name="viewport" content="width=device-width, initial-scale=1">
+ <title>Apache Aurora</title>
+ <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css">
+ <link href="/assets/css/main.css" rel="stylesheet">
+ <!-- Analytics -->
+ <script type="text/javascript">
+ var _gaq = _gaq || [];
+ _gaq.push(['_setAccount', 'UA-45879646-1']);
+ _gaq.push(['_setDomainName', 'apache.org']);
+ _gaq.push(['_trackPageview']);
+
+ (function() {
+ var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
+ ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
+ var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
+ })();
+ </script>
+ </head>
+ <body>
+
+ <div class="container-fluid section-header">
+ <div class="container">
+ <div class="nav nav-bar">
+ <a href="/"><img src="/assets/img/aurora_logo_white_bkg.svg" width="300" alt="Transparent Apache Aurora logo with dark background"/></a>
+ <ul class="nav navbar-nav navbar-right">
+ <li><a href="/documentation/latest/">Documentation</a></li>
+ <li><a href="/community/">Community</a></li>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/blog/">Blog</a></li>
+ </ul>
+ </div>
+ </div>
+</div>
+ <div class="container-fluid">
+ <div class="container content">
+ <h1 id="monitoring-your-aurora-cluster">Monitoring your Aurora cluster</h1>
+
+<p>Before you start running important services in your Aurora cluster, it’s important to set up
+monitoring and alerting of Aurora itself. Most of your monitoring can be against the scheduler,
+since it will give you a global view of what’s going on.</p>
+
+<h2 id="reading-stats">Reading stats</h2>
+
+<p>The scheduler exposes a <em>lot</em> of instrumentation data via its HTTP interface. You can get a quick
+peek at the first few of these in our vagrant image:</p>
+<pre class="highlight text">$ vagrant ssh -c 'curl -s localhost:8081/vars | head'
+async_tasks_completed 1004
+attribute_store_fetch_all_events 15
+attribute_store_fetch_all_events_per_sec 0.0
+attribute_store_fetch_all_nanos_per_event 0.0
+attribute_store_fetch_all_nanos_total 3048285
+attribute_store_fetch_all_nanos_total_per_sec 0.0
+attribute_store_fetch_one_events 3391
+attribute_store_fetch_one_events_per_sec 0.0
+attribute_store_fetch_one_nanos_per_event 0.0
+attribute_store_fetch_one_nanos_total 454690753
+</pre>
+<p>These values are served as <code>Content-Type: text/plain</code>, with each line containing a space-separated metric
+name and value. Values may be integers, doubles, or strings (note: strings are static, others
+may be dynamic).</p>
+
+<p>If your monitoring infrastructure prefers JSON, the scheduler exports that as well:</p>
+<pre class="highlight text">$ vagrant ssh -c 'curl -s localhost:8081/vars.json | python -mjson.tool | head'
+{
+ "async_tasks_completed": 1009,
+ "attribute_store_fetch_all_events": 15,
+ "attribute_store_fetch_all_events_per_sec": 0.0,
+ "attribute_store_fetch_all_nanos_per_event": 0.0,
+ "attribute_store_fetch_all_nanos_total": 3048285,
+ "attribute_store_fetch_all_nanos_total_per_sec": 0.0,
+ "attribute_store_fetch_one_events": 3409,
+ "attribute_store_fetch_one_events_per_sec": 0.0,
+ "attribute_store_fetch_one_nanos_per_event": 0.0,
+</pre>
+<p>This will be the same data as above, served with <code>Content-Type: application/json</code>.</p>
+
+<h2 id="viewing-live-stat-samples-on-the-scheduler">Viewing live stat samples on the scheduler</h2>
+
+<p>The scheduler uses the Twitter commons stats library, which keeps an internal time-series database
+of exported variables - nearly everything in <code>/vars</code> is available for instant graphing. This is
+useful for debugging, but is not a replacement for an external monitoring system.</p>
+
+<p>You can view these graphs on a scheduler at <code>/graphview</code>. It supports some composition and
+aggregation of values, which can be invaluable when triaging a problem. For example, if you have
+the scheduler running in vagrant, check out these links:
+<a href="http://192.168.33.7:8081/graphview?query=jvm_uptime_secs">simple graph</a>
+<a href="http://192.168.33.7:8081/graphview?query=rate(scheduler_log_native_append_nanos_total)%2Frate(scheduler_log_native_append_events)%2F1e6">complex composition</a></p>
+
+<h3 id="counters-and-gauges">Counters and gauges</h3>
+
+<p>Among numeric stats, there are two fundamental types of stats exported: <em>counters</em> and <em>gauges</em>.
+Counters are guaranteed to be monotonically-increasing for the lifetime of a process, while gauges
+may decrease in value. Aurora uses counters to represent things like the number of times an event
+has occurred, and gauges to capture things like the current length of a queue. Counters are a
+natural fit for accurate composition into <a href="http://en.wikipedia.org/wiki/Rate_ratio">rate ratios</a>
+(useful for sample-resistant latency calculation), while gauges are not.</p>
+
+<h1 id="alerting">Alerting</h1>
+
+<h2 id="quickstart">Quickstart</h2>
+
+<p>If you are looking for just bare-minimum alerting to get something in place quickly, set up alerting
+on <code>framework_registered</code> and <code>task_store_LOST</code>. These will give you a decent picture of overall
+health.</p>
+
+<h2 id="a-note-on-thresholds">A note on thresholds</h2>
+
+<p>One of the most difficult things in monitoring is choosing alert thresholds. With many of these
+stats, there is no value we can offer as a threshold that will be guaranteed to work for you. It
+will depend on the size of your cluster, number of jobs, churn of tasks in the cluster, etc. We
+recommend you start with a strict value after viewing a small amount of collected data, and then
+adjust thresholds as you see fit. Feel free to ask us if you would like to validate that your alerts
+and thresholds make sense.</p>
+
+<h4 id="jvm_uptime_secs"><code>jvm_uptime_secs</code></h4>
+
+<p>Type: integer counter</p>
+
+<h4 id="description">Description</h4>
+
+<p>The number of seconds the JVM process has been running. Comes from
+<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/management/RuntimeMXBean.html#getUptime()">RuntimeMXBean#getUptime()</a></p>
+
+<h4 id="alerting">Alerting</h4>
+
+<p>Detecting resets (decreasing values) on this stat will tell you that the scheduler is failing to
+stay alive.</p>
+
+<h4 id="triage">Triage</h4>
+
+<p>Look at the scheduler logs to identify the reason the scheduler is exiting.</p>
+
+<h4 id="system_load_avg"><code>system_load_avg</code></h4>
+
+<p>Type: double gauge</p>
+
+<h4 id="description">Description</h4>
+
+<p>The current load average of the system for the last minute. Comes from
+<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/management/OperatingSystemMXBean.html?is-external=true#getSystemLoadAverage()">OperatingSystemMXBean#getSystemLoadAverage()</a>.</p>
+
+<h4 id="alerting">Alerting</h4>
+
+<p>A high sustained value suggests that the scheduler machine may be over-utilized.</p>
+
+<h4 id="triage">Triage</h4>
+
+<p>Use standard unix tools like <code>top</code> and <code>ps</code> to track down the offending process(es).</p>
+
+<h4 id="process_cpu_cores_utilized"><code>process_cpu_cores_utilized</code></h4>
+
+<p>Type: double gauge</p>
+
+<h4 id="description">Description</h4>
+
+<p>The current number of CPU cores in use by the JVM process. This should not exceed the number of
+logical CPU cores on the machine. Derived from
+<a href="http://docs.oracle.com/javase/7/docs/jre/api/management/extension/com/sun/management/OperatingSystemMXBean.html">OperatingSystemMXBean#getProcessCpuTime()</a></p>
+
+<h4 id="alerting">Alerting</h4>
+
+<p>A high sustained value indicates that the scheduler is overworked. Due to current internal design
+limitations, if this value is sustained at <code>1</code>, there is a good chance the scheduler is under water.</p>
+
+<h4 id="triage">Triage</h4>
+
+<p>There are two main inputs that tend to drive this figure: task scheduling attempts and status
+updates from Mesos. You may see activity in the scheduler logs to give an indication of where
+time is being spent. Beyond that, it really takes good familiarity with the code to effectively
+triage this. We suggest engaging with an Aurora developer.</p>
+
+<h4 id="task_store_lost"><code>task_store_LOST</code></h4>
+
+<p>Type: integer gauge</p>
+
+<h4 id="description">Description</h4>
+
+<p>The number of tasks stored in the scheduler that are in the <code>LOST</code> state, and have been rescheduled.</p>
+
+<h4 id="alerting">Alerting</h4>
+
+<p>If this value is increasing at a high rate, it is a sign of trouble.</p>
+
+<h4 id="triage">Triage</h4>
+
+<p>There are many sources of <code>LOST</code> tasks in Mesos: the scheduler, master, slave, and executor can all
+trigger this. The first step is to look in the scheduler logs for <code>LOST</code> to identify where the
+state changes are originating.</p>
+
+<h4 id="scheduler_resource_offers"><code>scheduler_resource_offers</code></h4>
+
+<p>Type: integer counter</p>
+
+<h4 id="description">Description</h4>
+
+<p>The number of resource offers that the scheduler has received.</p>
+
+<h4 id="alerting">Alerting</h4>
+
+<p>For a healthy scheduler, this value must be increasing over time.</p>
+
+<h5 id="triage">Triage</h5>
+
+<p>Assuming the scheduler is up and otherwise healthy, you will want to check if the master thinks it
+is sending offers. You should also look at the master’s web interface to see if it has a large
+number of outstanding offers that it is waiting to be returned.</p>
+
+<h4 id="framework_registered"><code>framework_registered</code></h4>
+
+<p>Type: binary integer counter</p>
+
+<h4 id="description">Description</h4>
+
+<p>Will be <code>1</code> for the leading scheduler that is registered with the Mesos master, <code>0</code> for passive
+schedulers,</p>
+
+<h4 id="alerting">Alerting</h4>
+
+<p>A sustained period without a <code>1</code> (or where <code>sum() != 1</code>) warrants investigation.</p>
+
+<h4 id="triage">Triage</h4>
+
+<p>If there is no leading scheduler, look in the scheduler and master logs for why. If there are
+multiple schedulers claiming leadership, this suggests a split brain and warrants filing a critical
+bug.</p>
+
+<h4 id="rate(scheduler_log_native_append_nanos_total)/rate(scheduler_log_native_append_events)"><code>rate(scheduler_log_native_append_nanos_total)/rate(scheduler_log_native_append_events)</code></h4>
+
+<p>Type: rate ratio of integer counters</p>
+
+<h4 id="description">Description</h4>
+
+<p>This composes two counters to compute a windowed figure for the latency of replicated log writes.</p>
+
+<h4 id="alerting">Alerting</h4>
+
+<p>A hike in this value suggests disk bandwidth contention.</p>
+
+<h4 id="triage">Triage</h4>
+
+<p>Look in scheduler logs for any reported oddness with saving to the replicated log. Also use
+standard tools like <code>vmstat</code> and <code>iotop</code> to identify whether the disk has become slow or
+over-utilized. We suggest using a dedicated disk for the replicated log to mitigate this.</p>
+
+<h4 id="timed_out_tasks"><code>timed_out_tasks</code></h4>
+
+<p>Type: integer counter</p>
+
+<h4 id="description">Description</h4>
+
+<p>Tracks the number of times the scheduler has given up while waiting
+(for <code>-transient_task_state_timeout</code>) to hear back about a task that is in a transient state
+(e.g. <code>ASSIGNED</code>, <code>KILLING</code>), and has moved to <code>LOST</code> before rescheduling.</p>
+
+<h4 id="alerting">Alerting</h4>
+
+<p>This value is currently known to increase occasionally when the scheduler fails over
+(<a href="https://issues.apache.org/jira/browse/AURORA-740">AURORA-740</a>). However, any large spike in this
+value warrants investigation.</p>
+
+<h4 id="triage">Triage</h4>
+
+<p>The scheduler will log when it times out a task. You should trace the task ID of the timed out
+task into the master, slave, and/or executors to determine where the message was dropped.</p>
+
+<h4 id="http_500_responses_events"><code>http_500_responses_events</code></h4>
+
+<p>Type: integer counter</p>
+
+<h4 id="description">Description</h4>
+
+<p>The total number of HTTP 500 status responses sent by the scheduler. Includes API and asset serving.</p>
+
+<h4 id="alerting">Alerting</h4>
+
+<p>An increase warrants investigation.</p>
+
+<h4 id="triage">Triage</h4>
+
+<p>Look in scheduler logs to identify why the scheduler returned a 500, there should be a stack trace.</p>
+
+ </div>
+ </div>
+
+ <div class="container-fluid section-footer buffer">
+ <div class="container">
+ <div class="row">
+ <div class="col-md-2 col-md-offset-1"><h3>Quick Links</h3>
+ <ul>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/community/">Mailing Lists</a></li>
+ <li><a href="http://issues.apache.org/jira/browse/AURORA">Issue Tracking</a></li>
+ <li><a href="/documentation/latest/contributing/">How To Contribute</a></li>
+ </ul>
+ </div>
+ <div class="col-md-2"><h3>The ASF</h3>
+ <ul>
+ <li><a href="http://www.apache.org/licenses/">License</a></li>
+ <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+ <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
+ <li><a href="http://www.apache.org/security/">Security</a></li>
+ </ul>
+ </div>
+ <div class="col-md-6">
+ <p class="disclaimer">Apache Aurora is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.</p>
+ <p class="disclaimer">Copyright 2014 <a href="http://www.apache.org/">Apache Software Foundation</a>. Licensed under the <a href="http://www.apache.org/licenses/">Apache License v2.0</a>. The <a href="https://www.flickr.com/photos/trondk/12706051375/">Aurora Borealis IX photo</a> displayed on the homepage is available under a <a href="https://creativecommons.org/licenses/by-nc-nd/2.0/">Creative Commons BY-NC-ND 2.0 license</a>. Apache, Apache Aurora, and the Apache feather logo are trademarks of The Apache Software Foundation.</p>
+ </div>
+ </div>
+ </div>
+ </body>
+</html>
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+<!DOCTYPE html>
+<html lang="en">
+ <head>
+ <meta charset="utf-8">
+ <meta name="viewport" content="width=device-width, initial-scale=1">
+ <title>Apache Aurora</title>
+ <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css">
+ <link href="/assets/css/main.css" rel="stylesheet">
+ <!-- Analytics -->
+ <script type="text/javascript">
+ var _gaq = _gaq || [];
+ _gaq.push(['_setAccount', 'UA-45879646-1']);
+ _gaq.push(['_setDomainName', 'apache.org']);
+ _gaq.push(['_trackPageview']);
+
+ (function() {
+ var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
+ ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
+ var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
+ })();
+ </script>
+ </head>
+ <body>
+
+ <div class="container-fluid section-header">
+ <div class="container">
+ <div class="nav nav-bar">
+ <a href="/"><img src="/assets/img/aurora_logo_white_bkg.svg" width="300" alt="Transparent Apache Aurora logo with dark background"/></a>
+ <ul class="nav navbar-nav navbar-right">
+ <li><a href="/documentation/latest/">Documentation</a></li>
+ <li><a href="/community/">Community</a></li>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/blog/">Blog</a></li>
+ </ul>
+ </div>
+ </div>
+</div>
+ <div class="container-fluid">
+ <div class="container content">
+ <h1 id="resource-isolation-and-sizing">Resource Isolation and Sizing</h1>
+
+<p><strong>NOTE</strong>: Resource Isolation and Sizing is very much a work in progress.
+Both user-facing aspects and how it works under the hood are subject to
+change.</p>
+
+<ul>
+<li><a href="#introduction">Introduction</a></li>
+<li><a href="#cpu-isolation">CPU Isolation</a></li>
+<li><a href="#cpu-sizing">CPU Sizing</a></li>
+<li><a href="#memory-isolation">Memory Isolation</a></li>
+<li><a href="#memory-sizing">Memory Sizing</a></li>
+<li><a href="#disk-space">Disk Space</a></li>
+<li><a href="#disk-space-sizing">Disk Space Sizing</a></li>
+<li><a href="#other-resources">Other Resources</a></li>
+</ul>
+
+<h2 id="introduction">Introduction</h2>
+
+<p>Aurora is a multi-tenant system; a single software instance runs on a
+server, serving multiple clients/tenants. To share resources among
+tenants, it implements isolation of:</p>
+
+<ul>
+<li>CPU</li>
+<li>memory</li>
+<li>disk space</li>
+</ul>
+
+<p>CPU is a soft limit, and handled differently from memory and disk space.
+Too low a CPU value results in throttling your application and
+slowing it down. Memory and disk space are both hard limits; when your
+application goes over these values, it’s killed.</p>
+
+<p>Let’s look at each resource type in more detail:</p>
+
+<h2 id="cpu-isolation">CPU Isolation</h2>
+
+<p>Mesos uses a quota based CPU scheduler (the <em>Completely Fair Scheduler</em>)
+to provide consistent and predictable performance. This is effectively
+a guarantee of resources – you receive at least what you requested, but
+also no more than you’ve requested.</p>
+
+<p>The scheduler gives applications a CPU quota for every 100 ms interval.
+When an application uses its quota for an interval, it is throttled for
+the rest of the 100 ms. Usage resets for each interval and unused
+quota does not carry over.</p>
+
+<p>For example, an application specifying 4.0 CPU has access to 400 ms of
+CPU time every 100 ms. This CPU quota can be used in different ways,
+depending on the application and available resources. Consider the
+scenarios shown in this diagram.</p>
+
+<p><img alt="CPU Availability" src="../images/CPUavailability.png" /></p>
+
+<ul>
+<li><p><em>Scenario A</em>: the application can use up to 4 cores continuously for
+every 100 ms interval. It is never throttled and starts processing
+new requests immediately.</p></li>
+<li><p><em>Scenario B</em> : the application uses up to 8 cores (depending on
+availability) but is throttled after 50 ms. The CPU quota resets at the
+start of each new 100 ms interval.</p></li>
+<li><p><em>Scenario C</em> : is like Scenario A, but there is a garbage collection
+event in the second interval that consumes all CPU quota. The
+application throttles for the remaining 75 ms of that interval and
+cannot service requests until the next interval. In this example, the
+garbage collection finished in one interval but, depending on how much
+garbage needs collecting, it may take more than one interval and further
+delay service of requests.</p></li>
+</ul>
+
+<p><em>Technical Note</em>: Mesos considers logical cores, also known as
+hyperthreading or SMT cores, as the unit of CPU.</p>
+
+<h2 id="cpu-sizing">CPU Sizing</h2>
+
+<p>To correctly size Aurora-run Mesos tasks, specify a per-shard CPU value
+that lets the task run at its desired performance when at peak load
+distributed across all shards. Include reserve capacity of at least 50%,
+possibly more, depending on how critical your service is (or how
+confident you are about your original estimate : -)), ideally by
+increasing the number of shards to also improve resiliency. When running
+your application, observe its CPU stats over time. If consistently at or
+near your quota during peak load, you should consider increasing either
+per-shard CPU or the number of shards.</p>
+
+<h2 id="memory-isolation">Memory Isolation</h2>
+
+<p>Mesos uses dedicated memory allocation. Your application always has
+access to the amount of memory specified in your configuration. The
+application’s memory use is defined as the sum of the resident set size
+(RSS) of all processes in a shard. Each shard is considered
+independently.</p>
+
+<p>In other words, say you specified a memory size of 10GB. Each shard
+would receive 10GB of memory. If an individual shard’s memory demands
+exceed 10GB, that shard is killed, but the other shards continue
+working.</p>
+
+<p><em>Technical note</em>: Total memory size is not enforced at allocation time,
+so your application can request more than its allocation without getting
+an ENOMEM. However, it will be killed shortly after.</p>
+
+<h2 id="memory-sizing">Memory Sizing</h2>
+
+<p>Size for your application’s peak requirement. Observe the per-instance
+memory statistics over time, as memory requirements can vary over
+different periods. Remember that if your application exceeds its memory
+value, it will be killed, so you should also add a safety margin of
+around 10-20%. If you have the ability to do so, you may also want to
+put alerts on the per-instance memory.</p>
+
+<h2 id="disk-space">Disk Space</h2>
+
+<p>Disk space used by your application is defined as the sum of the files'
+disk space in your application’s directory, including the <code>stdout</code> and
+<code>stderr</code> logged from your application. Each shard is considered
+independently. You should use off-node storage for your application’s
+data whenever possible.</p>
+
+<p>In other words, say you specified disk space size of 100MB. Each shard
+would receive 100MB of disk space. If an individual shard’s disk space
+demands exceed 100MB, that shard is killed, but the other shards
+continue working.</p>
+
+<p>After your application finishes running, its allocated disk space is
+reclaimed. Thus, your job’s final action should move any disk content
+that you want to keep, such as logs, to your home file system or other
+less transitory storage. Disk reclamation takes place an undefined
+period after the application finish time; until then, the disk contents
+are still available but you shouldn’t count on them being so.</p>
+
+<p><em>Technical note</em> : Disk space is not enforced at write so your
+application can write above its quota without getting an ENOSPC, but it
+will be killed shortly after. This is subject to change.</p>
+
+<h2 id="disk-space-sizing">Disk Space Sizing</h2>
+
+<p>Size for your application’s peak requirement. Rotate and discard log
+files as needed to stay within your quota. When running a Java process,
+add the maximum size of the Java heap to your disk space requirement, in
+order to account for an out of memory error dumping the heap
+into the application’s sandbox space.</p>
+
+<h2 id="other-resources">Other Resources</h2>
+
+<p>Other resources, such as network bandwidth, do not have any performance
+guarantees. For some resources, such as memory bandwidth, there are no
+practical sharing methods so some application combinations collocated on
+the same host may cause contention.</p>
+
+ </div>
+ </div>
+
+ <div class="container-fluid section-footer buffer">
+ <div class="container">
+ <div class="row">
+ <div class="col-md-2 col-md-offset-1"><h3>Quick Links</h3>
+ <ul>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/community/">Mailing Lists</a></li>
+ <li><a href="http://issues.apache.org/jira/browse/AURORA">Issue Tracking</a></li>
+ <li><a href="/documentation/latest/contributing/">How To Contribute</a></li>
+ </ul>
+ </div>
+ <div class="col-md-2"><h3>The ASF</h3>
+ <ul>
+ <li><a href="http://www.apache.org/licenses/">License</a></li>
+ <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+ <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
+ <li><a href="http://www.apache.org/security/">Security</a></li>
+ </ul>
+ </div>
+ <div class="col-md-6">
+ <p class="disclaimer">Apache Aurora is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.</p>
+ <p class="disclaimer">Copyright 2014 <a href="http://www.apache.org/">Apache Software Foundation</a>. Licensed under the <a href="http://www.apache.org/licenses/">Apache License v2.0</a>. The <a href="https://www.flickr.com/photos/trondk/12706051375/">Aurora Borealis IX photo</a> displayed on the homepage is available under a <a href="https://creativecommons.org/licenses/by-nc-nd/2.0/">Creative Commons BY-NC-ND 2.0 license</a>. Apache, Apache Aurora, and the Apache feather logo are trademarks of The Apache Software Foundation.</p>
+ </div>
+ </div>
+ </div>
+ </body>
+</html>
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+<!DOCTYPE html>
+<html lang="en">
+ <head>
+ <meta charset="utf-8">
+ <meta name="viewport" content="width=device-width, initial-scale=1">
+ <title>Apache Aurora</title>
+ <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css">
+ <link href="/assets/css/main.css" rel="stylesheet">
+ <!-- Analytics -->
+ <script type="text/javascript">
+ var _gaq = _gaq || [];
+ _gaq.push(['_setAccount', 'UA-45879646-1']);
+ _gaq.push(['_setDomainName', 'apache.org']);
+ _gaq.push(['_trackPageview']);
+
+ (function() {
+ var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
+ ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
+ var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
+ })();
+ </script>
+ </head>
+ <body>
+
+ <div class="container-fluid section-header">
+ <div class="container">
+ <div class="nav nav-bar">
+ <a href="/"><img src="/assets/img/aurora_logo_white_bkg.svg" width="300" alt="Transparent Apache Aurora logo with dark background"/></a>
+ <ul class="nav navbar-nav navbar-right">
+ <li><a href="/documentation/latest/">Documentation</a></li>
+ <li><a href="/community/">Community</a></li>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/blog/">Blog</a></li>
+ </ul>
+ </div>
+ </div>
+</div>
+ <div class="container-fluid">
+ <div class="container content">
+ <h1 id="snapshot-performance">Snapshot Performance</h1>
+
+<p>Periodically the scheduler writes a full snapshot of its state to the replicated log. To do this
+it needs to hold a global storage write lock while it writes out this data. In large clusters
+this has been observed to take up to 40 seconds. Long pauses can cause issues in the system,
+including delays in scheduling new tasks.</p>
+
+<p>The scheduler has two optimizations to reduce the size of snapshots and thus improve snapshot
+performance: compression and deduplication. Most users will want to enable both compression
+and deduplication.</p>
+
+<h2 id="compression">Compression</h2>
+
+<p>To reduce the size of the snapshot the DEFLATE algorithm can be applied to the serialized bytes
+of the snapshot as they are written to the stream. This reduces the total number of bytes that
+need to be written to the replicated log at the cost of CPU and generally reduces the amount
+of time a snapshot takes. Most users will want to enable both compression and deduplication.</p>
+
+<h3 id="enabling-compression">Enabling Compression</h3>
+
+<p>Snapshot compression is enabled via the <code>-deflate_snapshots</code> flag. This is the default since
+Aurora 0.5.0. All released versions of Aurora can read both compressed and uncompressed snapshots,
+so there are no backwards compatibility concerns associated with changing this flag.</p>
+
+<h3 id="disabling-compression">Disabling compression</h3>
+
+<p>Disable compression by passing <code>-deflate_snapshots=false</code>.</p>
+
+<h2 id="deduplication">Deduplication</h2>
+
+<p>In Aurora 0.6.0 a new snapshot format was introduced. Rather than write one configuration blob
+per Mesos task this format stores each configuration blob once, and each Mesos task with a
+pointer to its blob. This format is not backwards compatible with earlier versions of Aurora.</p>
+
+<h3 id="enabling-deduplication">Enabling Deduplication</h3>
+
+<p>After upgrading Aurora to 0.6.0, enable deduplication with the <code>-deduplicate_snapshots</code> flag.
+After the first snapshot the cluster will be using the deduplicated format to write to the
+replicated log. Snapshots are created periodically by the scheduler (according to
+the <code>-dlog_snapshot_interval</code> flag). An administrator can also force a snapshot operation with
+<code>aurora_admin snapshot</code>.</p>
+
+<h3 id="disabling-deduplication">Disabling Deduplication</h3>
+
+<p>To disable deduplication, for example to rollback to Aurora, restart all of the cluster’s
+schedulers with <code>-deduplicate_snapshots=false</code> and either wait for a snapshot or force one
+using <code>aurora_admin snapshot</code>.</p>
+
+ </div>
+ </div>
+
+ <div class="container-fluid section-footer buffer">
+ <div class="container">
+ <div class="row">
+ <div class="col-md-2 col-md-offset-1"><h3>Quick Links</h3>
+ <ul>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/community/">Mailing Lists</a></li>
+ <li><a href="http://issues.apache.org/jira/browse/AURORA">Issue Tracking</a></li>
+ <li><a href="/documentation/latest/contributing/">How To Contribute</a></li>
+ </ul>
+ </div>
+ <div class="col-md-2"><h3>The ASF</h3>
+ <ul>
+ <li><a href="http://www.apache.org/licenses/">License</a></li>
+ <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+ <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
+ <li><a href="http://www.apache.org/security/">Security</a></li>
+ </ul>
+ </div>
+ <div class="col-md-6">
+ <p class="disclaimer">Apache Aurora is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.</p>
+ <p class="disclaimer">Copyright 2014 <a href="http://www.apache.org/">Apache Software Foundation</a>. Licensed under the <a href="http://www.apache.org/licenses/">Apache License v2.0</a>. The <a href="https://www.flickr.com/photos/trondk/12706051375/">Aurora Borealis IX photo</a> displayed on the homepage is available under a <a href="https://creativecommons.org/licenses/by-nc-nd/2.0/">Creative Commons BY-NC-ND 2.0 license</a>. Apache, Apache Aurora, and the Apache feather logo are trademarks of The Apache Software Foundation.</p>
+ </div>
+ </div>
+ </div>
+ </body>
+</html>
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+<!DOCTYPE html>
+<html lang="en">
+ <head>
+ <meta charset="utf-8">
+ <meta name="viewport" content="width=device-width, initial-scale=1">
+ <title>Apache Aurora</title>
+ <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css">
+ <link href="/assets/css/main.css" rel="stylesheet">
+ <!-- Analytics -->
+ <script type="text/javascript">
+ var _gaq = _gaq || [];
+ _gaq.push(['_setAccount', 'UA-45879646-1']);
+ _gaq.push(['_setDomainName', 'apache.org']);
+ _gaq.push(['_trackPageview']);
+
+ (function() {
+ var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
+ ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
+ var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
+ })();
+ </script>
+ </head>
+ <body>
+
+ <div class="container-fluid section-header">
+ <div class="container">
+ <div class="nav nav-bar">
+ <a href="/"><img src="/assets/img/aurora_logo_white_bkg.svg" width="300" alt="Transparent Apache Aurora logo with dark background"/></a>
+ <ul class="nav navbar-nav navbar-right">
+ <li><a href="/documentation/latest/">Documentation</a></li>
+ <li><a href="/community/">Community</a></li>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/blog/">Blog</a></li>
+ </ul>
+ </div>
+ </div>
+</div>
+ <div class="container-fluid">
+ <div class="container content">
+ <h2 id="aurora-sla-measurement">Aurora SLA Measurement</h2>
+
+<ul>
+<li><a href="#overview">Overview</a></li>
+<li><a href="#metric-details">Metric Details</a>
+
+<ul>
+<li><a href="#platform-uptime">Platform Uptime</a></li>
+<li><a href="#job-uptime">Job Uptime</a></li>
+<li><a href="#median-time-to-assigned-(mtta)">Median Time To Assigned (MTTA)</a></li>
+<li><a href="#median-time-to-running-(mttr)">Median Time To Running (MTTR)</a></li>
+</ul></li>
+<li><a href="#limitations">Limitations</a></li>
+</ul>
+
+<h2 id="overview">Overview</h2>
+
+<p>The primary goal of the feature is collection and monitoring of Aurora job SLA (Service Level
+Agreements) metrics that defining a contractual relationship between the Aurora/Mesos platform
+and hosted services.</p>
+
+<p>The Aurora SLA feature currently supports stat collection only for service (non-cron)
+production jobs (<code>"production = True"</code> in your <code>.aurora</code> config).</p>
+
+<p>Counters that track SLA measurements are computed periodically within the scheduler.
+The individual instance metrics are refreshed every minute (configurable via
+<code>sla_stat_refresh_interval</code>). The instance counters are subsequently aggregated by
+relevant grouping types before exporting to scheduler <code>/vars</code> endpoint (when using <code>vagrant</code>
+that would be <code>http://192.168.33.7:8081/vars</code>)</p>
+
+<h2 id="metric-details">Metric Details</h2>
+
+<h3 id="platform-uptime">Platform Uptime</h3>
+
+<p><em>Aggregate amount of time a job spends in a non-runnable state due to platform unavailability
+or scheduling delays. This metric tracks Aurora/Mesos uptime performance and reflects on any
+system-caused downtime events (tasks LOST or DRAINED). Any user-initiated task kills/restarts
+will not degrade this metric.</em></p>
+
+<p><strong>Collection scope:</strong></p>
+
+<ul>
+<li>Per job - <code>sla_<job_key>_platform_uptime_percent</code></li>
+<li>Per cluster - <code>sla_cluster_platform_uptime_percent</code></li>
+</ul>
+
+<p><strong>Units:</strong> percent</p>
+
+<p>A fault in the task environment may cause the Aurora/Mesos to have different views on the task state
+or lose track of the task existence. In such cases, the service task is marked as LOST and
+rescheduled by Aurora. For example, this may happen when the task stays in ASSIGNED or STARTING
+for too long or the Mesos slave becomes unhealthy (or disappears completely). The time between
+task entering LOST and its replacement reaching RUNNING state is counted towards platform downtime.</p>
+
+<p>Another example of a platform downtime event is the administrator-requested task rescheduling. This
+happens during planned Mesos slave maintenance when all slave tasks are marked as DRAINED and
+rescheduled elsewhere.</p>
+
+<p>To accurately calculate Platform Uptime, we must separate platform incurred downtime from user
+actions that put a service instance in a non-operational state. It is simpler to isolate
+user-incurred downtime and treat all other downtime as platform incurred.</p>
+
+<p>Currently, a user can cause a healthy service (task) downtime in only two ways: via <code>killTasks</code>
+or <code>restartShards</code> RPCs. For both, their affected tasks leave an audit state transition trail
+relevant to uptime calculations. By applying a special “SLA meaning” to exposed task state
+transition records, we can build a deterministic downtime trace for every given service instance.</p>
+
+<p>A task going through a state transition carries one of three possible SLA meanings
+(see <a href="../src/main/java/org/apache/aurora/scheduler/sla/SlaAlgorithm.java">SlaAlgorithm.java</a> for
+sla-to-task-state mapping):</p>
+
+<ul>
+<li><p>Task is UP: starts a period where the task is considered to be up and running from the Aurora
+platform standpoint.</p></li>
+<li><p>Task is DOWN: starts a period where the task cannot reach the UP state for some
+non-user-related reason. Counts towards instance downtime.</p></li>
+<li><p>Task is REMOVED from SLA: starts a period where the task is not expected to be UP due to
+user initiated action or failure. We ignore this period for the uptime calculation purposes.</p></li>
+</ul>
+
+<p>This metric is recalculated over the last sampling period (last minute) to account for
+any UP/DOWN/REMOVED events. It ignores any UP/DOWN events not immediately adjacent to the
+sampling interval as well as adjacent REMOVED events.</p>
+
+<h3 id="job-uptime">Job Uptime</h3>
+
+<p><em>Percentage of the job instances considered to be in RUNNING state for the specified duration
+relative to request time. This is a purely application side metric that is considering aggregate
+uptime of all RUNNING instances. Any user- or platform initiated restarts directly affect
+this metric.</em></p>
+
+<p><strong>Collection scope:</strong> We currently expose job uptime values at 5 pre-defined
+percentiles (50th,75th,90th,95th and 99th):</p>
+
+<ul>
+<li><code>sla_<job_key>_job_uptime_50_00_sec</code></li>
+<li><code>sla_<job_key>_job_uptime_75_00_sec</code></li>
+<li><code>sla_<job_key>_job_uptime_90_00_sec</code></li>
+<li><code>sla_<job_key>_job_uptime_95_00_sec</code></li>
+<li><code>sla_<job_key>_job_uptime_99_00_sec</code></li>
+</ul>
+
+<p><strong>Units:</strong> seconds
+You can also get customized real-time stats from aurora client. See <code>aurora sla -h</code> for
+more details.</p>
+
+<h3 id="median-time-to-assigned-(mtta)">Median Time To Assigned (MTTA)</h3>
+
+<p><em>Median time a job spends waiting for its tasks to be assigned to a host. This is a combined
+metric that helps track the dependency of scheduling performance on the requested resources
+(user scope) as well as the internal scheduler bin-packing algorithm efficiency (platform scope).</em></p>
+
+<p><strong>Collection scope:</strong></p>
+
+<ul>
+<li>Per job - <code>sla_<job_key>_mtta_ms</code></li>
+<li>Per cluster - <code>sla_cluster_mtta_ms</code></li>
+<li>Per instance size (small, medium, large, x-large, xx-large). Size are defined in:
+<a href="../src/main/java/org/apache/aurora/scheduler/base/ResourceAggregates.java">ResourceAggregates.java</a>
+
+<ul>
+<li>By CPU:</li>
+<li><code>sla_cpu_small_mtta_ms</code></li>
+<li><code>sla_cpu_medium_mtta_ms</code></li>
+<li><code>sla_cpu_large_mtta_ms</code></li>
+<li><code>sla_cpu_xlarge_mtta_ms</code></li>
+<li><code>sla_cpu_xxlarge_mtta_ms</code></li>
+<li>By RAM:</li>
+<li><code>sla_ram_small_mtta_ms</code></li>
+<li><code>sla_ram_medium_mtta_ms</code></li>
+<li><code>sla_ram_large_mtta_ms</code></li>
+<li><code>sla_ram_xlarge_mtta_ms</code></li>
+<li><code>sla_ram_xxlarge_mtta_ms</code></li>
+<li>By DISK:</li>
+<li><code>sla_disk_small_mtta_ms</code></li>
+<li><code>sla_disk_medium_mtta_ms</code></li>
+<li><code>sla_disk_large_mtta_ms</code></li>
+<li><code>sla_disk_xlarge_mtta_ms</code></li>
+<li><code>sla_disk_xxlarge_mtta_ms</code></li>
+</ul></li>
+</ul>
+
+<p><strong>Units:</strong> milliseconds</p>
+
+<p>MTTA only considers instances that have already reached ASSIGNED state and ignores those
+that are still PENDING. This ensures straggler instances (e.g. with unreasonable resource
+constraints) do not affect metric curves.</p>
+
+<h3 id="median-time-to-running-(mttr)">Median Time To Running (MTTR)</h3>
+
+<p><em>Median time a job waits for its tasks to reach RUNNING state. This is a comprehensive metric
+reflecting on the overall time it takes for the Aurora/Mesos to start executing user content.</em></p>
+
+<p><strong>Collection scope:</strong></p>
+
+<ul>
+<li>Per job - <code>sla_<job_key>_mttr_ms</code></li>
+<li>Per cluster - <code>sla_cluster_mttr_ms</code></li>
+<li>Per instance size (small, medium, large, x-large, xx-large). Size are defined in:
+<a href="../src/main/java/org/apache/aurora/scheduler/base/ResourceAggregates.java">ResourceAggregates.java</a>
+
+<ul>
+<li>By CPU:</li>
+<li><code>sla_cpu_small_mttr_ms</code></li>
+<li><code>sla_cpu_medium_mttr_ms</code></li>
+<li><code>sla_cpu_large_mttr_ms</code></li>
+<li><code>sla_cpu_xlarge_mttr_ms</code></li>
+<li><code>sla_cpu_xxlarge_mttr_ms</code></li>
+<li>By RAM:</li>
+<li><code>sla_ram_small_mttr_ms</code></li>
+<li><code>sla_ram_medium_mttr_ms</code></li>
+<li><code>sla_ram_large_mttr_ms</code></li>
+<li><code>sla_ram_xlarge_mttr_ms</code></li>
+<li><code>sla_ram_xxlarge_mttr_ms</code></li>
+<li>By DISK:</li>
+<li><code>sla_disk_small_mttr_ms</code></li>
+<li><code>sla_disk_medium_mttr_ms</code></li>
+<li><code>sla_disk_large_mttr_ms</code></li>
+<li><code>sla_disk_xlarge_mttr_ms</code></li>
+<li><code>sla_disk_xxlarge_mttr_ms</code></li>
+</ul></li>
+</ul>
+
+<p><strong>Units:</strong> milliseconds</p>
+
+<p>MTTR only considers instances in RUNNING state. This ensures straggler instances (e.g. with
+unreasonable resource constraints) do not affect metric curves.</p>
+
+<h2 id="limitations">Limitations</h2>
+
+<ul>
+<li><p>The availability of Aurora SLA metrics is bound by the scheduler availability.</p></li>
+<li><p>All metrics are calculated at a pre-defined interval (currently set at 1 minute).
+Scheduler restarts may result in missed collections.</p></li>
+</ul>
+
+ </div>
+ </div>
+
+ <div class="container-fluid section-footer buffer">
+ <div class="container">
+ <div class="row">
+ <div class="col-md-2 col-md-offset-1"><h3>Quick Links</h3>
+ <ul>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/community/">Mailing Lists</a></li>
+ <li><a href="http://issues.apache.org/jira/browse/AURORA">Issue Tracking</a></li>
+ <li><a href="/documentation/latest/contributing/">How To Contribute</a></li>
+ </ul>
+ </div>
+ <div class="col-md-2"><h3>The ASF</h3>
+ <ul>
+ <li><a href="http://www.apache.org/licenses/">License</a></li>
+ <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+ <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
+ <li><a href="http://www.apache.org/security/">Security</a></li>
+ </ul>
+ </div>
+ <div class="col-md-6">
+ <p class="disclaimer">Apache Aurora is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.</p>
+ <p class="disclaimer">Copyright 2014 <a href="http://www.apache.org/">Apache Software Foundation</a>. Licensed under the <a href="http://www.apache.org/licenses/">Apache License v2.0</a>. The <a href="https://www.flickr.com/photos/trondk/12706051375/">Aurora Borealis IX photo</a> displayed on the homepage is available under a <a href="https://creativecommons.org/licenses/by-nc-nd/2.0/">Creative Commons BY-NC-ND 2.0 license</a>. Apache, Apache Aurora, and the Apache feather logo are trademarks of The Apache Software Foundation.</p>
+ </div>
+ </div>
+ </div>
+ </body>
+</html>
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+<!DOCTYPE html>
+<html lang="en">
+ <head>
+ <meta charset="utf-8">
+ <meta name="viewport" content="width=device-width, initial-scale=1">
+ <title>Apache Aurora</title>
+ <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css">
+ <link href="/assets/css/main.css" rel="stylesheet">
+ <!-- Analytics -->
+ <script type="text/javascript">
+ var _gaq = _gaq || [];
+ _gaq.push(['_setAccount', 'UA-45879646-1']);
+ _gaq.push(['_setDomainName', 'apache.org']);
+ _gaq.push(['_trackPageview']);
+
+ (function() {
+ var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
+ ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
+ var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
+ })();
+ </script>
+ </head>
+ <body>
+
+ <div class="container-fluid section-header">
+ <div class="container">
+ <div class="nav nav-bar">
+ <a href="/"><img src="/assets/img/aurora_logo_white_bkg.svg" width="300" alt="Transparent Apache Aurora logo with dark background"/></a>
+ <ul class="nav navbar-nav navbar-right">
+ <li><a href="/documentation/latest/">Documentation</a></li>
+ <li><a href="/community/">Community</a></li>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/blog/">Blog</a></li>
+ </ul>
+ </div>
+ </div>
+</div>
+ <div class="container-fluid">
+ <div class="container content">
+ <h1 id="storage-configuration-and-maintenance">Storage Configuration And Maintenance</h1>
+
+<ul>
+<li><a href="#overview">Overview</a></li>
+<li><a href="#scheduler-storage-configuration-flags">Scheduler storage configuration flags</a>
+
+<ul>
+<li><a href="#mesos-replicated-log-configuration-flags">Mesos replicated log configuration flags</a></li>
+<li><a href="#-native_log_quorum_size">-native<em>log</em>quorum_size</a></li>
+<li><a href="#-native_log_file_path">-native<em>log</em>file_path</a></li>
+<li><a href="#-native_log_zk_group_path">-native<em>log</em>zk<em>group</em>path</a></li>
+<li><a href="#backup-configuration-flags">Backup configuration flags</a></li>
+<li><a href="#-backup_interval">-backup_interval</a></li>
+<li><a href="#-backup_dir">-backup_dir</a></li>
+<li><a href="#-max_saved_backups">-max<em>saved</em>backups</a></li>
+</ul></li>
+<li><a href="#recovering-from-a-scheduler-backup">Recovering from a scheduler backup</a>
+
+<ul>
+<li><a href="#summary">Summary</a></li>
+<li><a href="#preparation">Preparation</a></li>
+<li><a href="#cleanup-and-re-initialize-mesos-replicated-log">Cleanup and re-initialize Mesos replicated log</a></li>
+<li><a href="#restore-from-backup">Restore from backup</a></li>
+<li><a href="#cleanup">Cleanup</a></li>
+</ul></li>
+</ul>
+
+<h2 id="overview">Overview</h2>
+
+<p>This document summarizes Aurora storage configuration and maintenance details and is
+intended for use by anyone deploying and/or maintaining Aurora.</p>
+
+<p>For a high level overview of the Aurora storage architecture refer to <a href="/documentation/latest/storage/">this document</a>.</p>
+
+<h2 id="scheduler-storage-configuration-flags">Scheduler storage configuration flags</h2>
+
+<p>Below is a summary of scheduler storage configuration flags that either don’t have default values
+or require attention before deploying in a production environment.</p>
+
+<h3 id="mesos-replicated-log-configuration-flags">Mesos replicated log configuration flags</h3>
+
+<h4 id="-nativelogquorum_size">-native<em>log</em>quorum_size</h4>
+
+<p>Defines the Mesos replicated log quorum size. See
+<a href="deploying-aurora-scheduler.md#replicated-log-configuration">the replicated log configuration document</a>
+on how to choose the right value.</p>
+
+<h4 id="-nativelogfile_path">-native<em>log</em>file_path</h4>
+
+<p>Location of the Mesos replicated log files. Consider allocating a dedicated disk (preferably SSD)
+for Mesos replicated log files to ensure optimal storage performance.</p>
+
+<h4 id="-nativelogzkgrouppath">-native<em>log</em>zk<em>group</em>path</h4>
+
+<p>ZooKeeper path used for Mesos replicated log quorum discovery.</p>
+
+<p>See <a href="../src/main/java/org/apache/aurora/scheduler/log/mesos/MesosLogStreamModule.java">code</a> for
+other available Mesos replicated log configuration options and default values.</p>
+
+<h3 id="backup-configuration-flags">Backup configuration flags</h3>
+
+<p>Configuration options for the Aurora scheduler backup manager.</p>
+
+<h4 id="-backup_interval">-backup_interval</h4>
+
+<p>The interval on which the scheduler writes local storage backups. The default is every hour.</p>
+
+<h4 id="-backup_dir">-backup_dir</h4>
+
+<p>Directory to write backups to.</p>
+
+<h4 id="-maxsavedbackups">-max<em>saved</em>backups</h4>
+
+<p>Maximum number of backups to retain before deleting the oldest backup(s).</p>
+
+<h2 id="recovering-from-a-scheduler-backup">Recovering from a scheduler backup</h2>
+
+<ul>
+<li><a href="#overview">Overview</a></li>
+<li><a href="#preparation">Preparation</a></li>
+<li><a href="#assess-mesos-replicated-log-damage">Assess Mesos replicated log damage</a></li>
+<li><a href="#restore-from-backup">Restore from backup</a></li>
+<li><a href="#cleanup">Cleanup</a></li>
+</ul>
+
+<p><strong>Be sure to read the entire page before attempting to restore from a backup, as it may have
+unintended consequences.</strong></p>
+
+<h3 id="summary">Summary</h3>
+
+<p>The restoration procedure replaces the existing (possibly corrupted) Mesos replicated log with an
+earlier, backed up, version and requires all schedulers to be taken down temporarily while
+restoring. Once completed, the scheduler state resets to what it was when the backup was created.
+This means any jobs/tasks created or updated after the backup are unknown to the scheduler and will
+be killed shortly after the cluster restarts. All other tasks continue operating as normal.</p>
+
+<p>Usually, it is a bad idea to restore a backup that is not extremely recent (i.e. older than a few
+hours). This is because the scheduler will expect the cluster to look exactly as the backup does,
+so any tasks that have been rescheduled since the backup was taken will be killed.</p>
+
+<h3 id="preparation">Preparation</h3>
+
+<p>Follow these steps to prepare the cluster for restoring from a backup:</p>
+
+<ul>
+<li><p>Stop all scheduler instances</p></li>
+<li><p>Consider blocking external traffic on a port defined in <code>-http_port</code> for all schedulers to
+prevent users from interacting with the scheduler during the restoration process. This will help
+troubleshooting by reducing the scheduler log noise and prevent users from making changes that will
+be erased after the backup snapshot is restored</p></li>
+<li><p>Next steps are required to put scheduler into a partially disabled state where it would still be
+able to accept storage recovery requests but unable to schedule or change task states. This may be
+accomplished by updating the following scheduler configuration options:</p>
+
+<ul>
+<li>Set <code>-mesos_master_address</code> to a non-existent zk address. This will prevent scheduler from
+registering with Mesos. E.g.: <code>-mesos_master_address=zk://localhost:2181</code></li>
+<li><code>-max_registration_delay</code> - set to sufficiently long interval to prevent registration timeout
+and as a result scheduler suicide. E.g: <code>-max_registration_delay=360min</code></li>
+<li>Make sure <code>-gc_executor_path</code> option is not set to prevent accidental task GC. This is
+important as scheduler will attempt to reconcile the cluster state and will kill all tasks when
+restarted with an empty Mesos replicated log.</li>
+</ul></li>
+<li><p>Restart all schedulers</p></li>
+</ul>
+
+<h3 id="cleanup-and-re-initialize-mesos-replicated-log">Cleanup and re-initialize Mesos replicated log</h3>
+
+<p>Get rid of the corrupted files and re-initialize Mesos replicate log:</p>
+
+<ul>
+<li>Stop schedulers</li>
+<li>Delete all files under <code>-native_log_file_path</code> on all schedulers</li>
+<li>Initialize Mesos replica’s log file: <code>mesos-log initialize <-native_log_file_path></code></li>
+<li>Restart schedulers</li>
+</ul>
+
+<h3 id="restore-from-backup">Restore from backup</h3>
+
+<p>At this point the scheduler is ready to rehydrate from the backup:</p>
+
+<ul>
+<li><p>Identify the leading scheduler by:</p>
+
+<ul>
+<li>running <code>aurora_admin get_scheduler <cluster></code> - if scheduler is responsive</li>
+<li>examining scheduler logs</li>
+<li>or examining Zookeeper registration under the path defined by <code>-zk_endpoints</code>
+and <code>-serverset_path</code></li>
+</ul></li>
+<li><p>Locate the desired backup file, copy it to the leading scheduler and stage recovery by running
+the following command on a leader
+<code>aurora_admin scheduler_stage_recovery <cluster> scheduler-backup-<yyyy-MM-dd-HH-mm></code></p></li>
+<li><p>At this point, the recovery snapshot is staged and available for manual verification/modification
+via <code>aurora_admin scheduler_print_recovery_tasks</code> and <code>scheduler_delete_recovery_tasks</code> commands.
+See <code>aurora_admin help <command></code> for usage details.</p></li>
+<li><p>Commit recovery. This instructs the scheduler to overwrite the existing Mesosreplicated log with
+the provided backup snapshot and initiate a mandatory failover
+<code>aurora_admin scheduler_commit_recovery <cluster></code></p></li>
+</ul>
+
+<h3 id="cleanup">Cleanup</h3>
+
+<p>Undo any modification done during <a href="#preparation">Preparation</a> sequence.</p>
+
+ </div>
+ </div>
+
+ <div class="container-fluid section-footer buffer">
+ <div class="container">
+ <div class="row">
+ <div class="col-md-2 col-md-offset-1"><h3>Quick Links</h3>
+ <ul>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/community/">Mailing Lists</a></li>
+ <li><a href="http://issues.apache.org/jira/browse/AURORA">Issue Tracking</a></li>
+ <li><a href="/documentation/latest/contributing/">How To Contribute</a></li>
+ </ul>
+ </div>
+ <div class="col-md-2"><h3>The ASF</h3>
+ <ul>
+ <li><a href="http://www.apache.org/licenses/">License</a></li>
+ <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+ <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
+ <li><a href="http://www.apache.org/security/">Security</a></li>
+ </ul>
+ </div>
+ <div class="col-md-6">
+ <p class="disclaimer">Apache Aurora is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.</p>
+ <p class="disclaimer">Copyright 2014 <a href="http://www.apache.org/">Apache Software Foundation</a>. Licensed under the <a href="http://www.apache.org/licenses/">Apache License v2.0</a>. The <a href="https://www.flickr.com/photos/trondk/12706051375/">Aurora Borealis IX photo</a> displayed on the homepage is available under a <a href="https://creativecommons.org/licenses/by-nc-nd/2.0/">Creative Commons BY-NC-ND 2.0 license</a>. Apache, Apache Aurora, and the Apache feather logo are trademarks of The Apache Software Foundation.</p>
+ </div>
+ </div>
+ </div>
+ </body>
+</html>
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/publish/documentation/latest/storage/index.html
----------------------------------------------------------------------
diff --git a/publish/documentation/latest/storage/index.html b/publish/documentation/latest/storage/index.html
new file mode 100644
index 0000000..8994195
--- /dev/null
+++ b/publish/documentation/latest/storage/index.html
@@ -0,0 +1,166 @@
+<!DOCTYPE html>
+<html lang="en">
+ <head>
+ <meta charset="utf-8">
+ <meta name="viewport" content="width=device-width, initial-scale=1">
+ <title>Apache Aurora</title>
+ <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css">
+ <link href="/assets/css/main.css" rel="stylesheet">
+ <!-- Analytics -->
+ <script type="text/javascript">
+ var _gaq = _gaq || [];
+ _gaq.push(['_setAccount', 'UA-45879646-1']);
+ _gaq.push(['_setDomainName', 'apache.org']);
+ _gaq.push(['_trackPageview']);
+
+ (function() {
+ var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
+ ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
+ var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
+ })();
+ </script>
+ </head>
+ <body>
+
+ <div class="container-fluid section-header">
+ <div class="container">
+ <div class="nav nav-bar">
+ <a href="/"><img src="/assets/img/aurora_logo_white_bkg.svg" width="300" alt="Transparent Apache Aurora logo with dark background"/></a>
+ <ul class="nav navbar-nav navbar-right">
+ <li><a href="/documentation/latest/">Documentation</a></li>
+ <li><a href="/community/">Community</a></li>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/blog/">Blog</a></li>
+ </ul>
+ </div>
+ </div>
+</div>
+ <div class="container-fluid">
+ <div class="container content">
+ <h1 id="aurora-scheduler-storage">Aurora Scheduler Storage</h1>
+
+<ul>
+<li><a href="#overview">Overview</a></li>
+<li><a href="#reads-writes-modifications">Reads, writes, modifications</a>
+
+<ul>
+<li><a href="#read-lifecycle">Read lifecycle</a></li>
+<li><a href="#write-lifecycle">Write lifecycle</a></li>
+</ul></li>
+<li><a href="#atomicity-consistency-and-isolation">Atomicity, consistency and isolation</a></li>
+<li><a href="#population-on-restart">Population on restart</a></li>
+</ul>
+
+<h2 id="overview">Overview</h2>
+
+<p>Aurora scheduler maintains data that need to be persisted to survive failovers and restarts.
+For example:</p>
+
+<ul>
+<li>Task configurations and scheduled task instances</li>
+<li>Job update configurations and update progress</li>
+<li>Production resource quotas</li>
+<li>Mesos resource offer host attributes</li>
+</ul>
+
+<p>Aurora solves its persistence needs by leveraging the Mesos implementation of a Paxos replicated
+log <a href="https://ramcloud.stanford.edu/~ongaro/userstudy/paxos.pdf">[1]</a>
+<a href="http://en.wikipedia.org/wiki/State_machine_replication">[2]</a> with a key-value
+<a href="https://github.com/google/leveldb">LevelDB</a> storage as persistence media.</p>
+
+<p>Conceptually, it can be represented by the following major components:</p>
+
+<ul>
+<li>Volatile storage: in-memory cache of all available data. Implemented via in-memory
+<a href="http://www.h2database.com/html/main.html">H2 Database</a> and accessed via
+<a href="http://mybatis.github.io/mybatis-3/">MyBatis</a>.</li>
+<li>Log manager: interface between Aurora storage and Mesos replicated log. The default schema format
+is <a href="https://github.com/apache/thrift">thrift</a>. Data is stored in serialized binary form.</li>
+<li>Snapshot manager: all data is periodically persisted in Mesos replicated log in a single snapshot.
+This helps establishing periodic recovery checkpoints and speeds up volatile storage recovery on
+restart.</li>
+<li>Backup manager: as a precaution, snapshots are periodically written out into backup files.
+This solves a <a href="storage-config.md#recovering-from-a-scheduler-backup">disaster recovery problem</a>
+in case of a complete loss or corruption of Mesos log files.</li>
+</ul>
+
+<p><img alt="Storage hierarchy" src="../images/storage_hierarchy.png" /></p>
+
+<h2 id="reads,-writes,-modifications">Reads, writes, modifications</h2>
+
+<p>All services in Aurora access data via a set of predefined store interfaces (aka stores) logically
+grouped by the type of data they serve. Every interface defines a specific set of operations allowed
+on the data thus abstracting out the storage access and the actual persistence implementation. The
+latter is especially important in view of a general immutability of persisted data. With the Mesos
+replicated log as the underlying persistence solution, data can be read and written easily but not
+modified. All modifications are simulated by saving new versions of modified objects. This feature
+and general performance considerations justify the existence of the volatile in-memory store.</p>
+
+<h3 id="read-lifecycle">Read lifecycle</h3>
+
+<p>There are two types of reads available in Aurora: consistent and weakly-consistent. The difference
+is explained <a href="#atomicity-and-isolation">below</a>.</p>
+
+<p>All reads are served from the volatile storage making reads generally cheap storage operations
+from the performance standpoint. The majority of the volatile stores are represented by the
+in-memory H2 database. This allows for rich schema definitions, queries and relationships that
+key-value storage is unable to match.</p>
+
+<h3 id="write-lifecycle">Write lifecycle</h3>
+
+<p>Writes are more involved operations since in addition to updating the volatile store data has to be
+appended to the replicated log. Data is not available for reads until fully ack-ed by both
+replicated log and volatile storage.</p>
+
+<h2 id="atomicity,-consistency-and-isolation">Atomicity, consistency and isolation</h2>
+
+<p>Aurora uses <a href="http://en.wikipedia.org/wiki/Write-ahead_logging">write-ahead logging</a> to ensure
+consistency between replicated and volatile storage. In Aurora, data is first written into the
+replicated log and only then updated in the volatile store.</p>
+
+<p>Aurora storage uses read-write locks to serialize data mutations and provide consistent view of the
+available data. The available <code>Storage</code> interface exposes 3 major types of operations:
+* <code>consistentRead</code> - access is locked using reader’s lock and provides consistent view on read
+* <code>weaklyConsistentRead</code> - access is lock-less. Delivers best contention performance but may result
+in stale reads
+* <code>write</code> - access is fully serialized by using writer’s lock. Operation success requires both
+volatile and replicated writes to succeed.</p>
+
+<p>The consistency of the volatile store is enforced via H2 transactional isolation.</p>
+
+<h2 id="population-on-restart">Population on restart</h2>
+
+<p>Any time a scheduler restarts, it restores its volatile state from the most recent position recorded
+in the replicated log by restoring the snapshot and replaying individual log entries on top to fully
+recover the state up to the last write.</p>
+
+ </div>
+ </div>
+
+ <div class="container-fluid section-footer buffer">
+ <div class="container">
+ <div class="row">
+ <div class="col-md-2 col-md-offset-1"><h3>Quick Links</h3>
+ <ul>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/community/">Mailing Lists</a></li>
+ <li><a href="http://issues.apache.org/jira/browse/AURORA">Issue Tracking</a></li>
+ <li><a href="/documentation/latest/contributing/">How To Contribute</a></li>
+ </ul>
+ </div>
+ <div class="col-md-2"><h3>The ASF</h3>
+ <ul>
+ <li><a href="http://www.apache.org/licenses/">License</a></li>
+ <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+ <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
+ <li><a href="http://www.apache.org/security/">Security</a></li>
+ </ul>
+ </div>
+ <div class="col-md-6">
+ <p class="disclaimer">Apache Aurora is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.</p>
+ <p class="disclaimer">Copyright 2014 <a href="http://www.apache.org/">Apache Software Foundation</a>. Licensed under the <a href="http://www.apache.org/licenses/">Apache License v2.0</a>. The <a href="https://www.flickr.com/photos/trondk/12706051375/">Aurora Borealis IX photo</a> displayed on the homepage is available under a <a href="https://creativecommons.org/licenses/by-nc-nd/2.0/">Creative Commons BY-NC-ND 2.0 license</a>. Apache, Apache Aurora, and the Apache feather logo are trademarks of The Apache Software Foundation.</p>
+ </div>
+ </div>
+ </div>
+ </body>
+</html>
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/publish/documentation/latest/test-resource-generation/index.html
----------------------------------------------------------------------
diff --git a/publish/documentation/latest/test-resource-generation/index.html b/publish/documentation/latest/test-resource-generation/index.html
new file mode 100644
index 0000000..846a2f1
--- /dev/null
+++ b/publish/documentation/latest/test-resource-generation/index.html
@@ -0,0 +1,97 @@
+<!DOCTYPE html>
+<html lang="en">
+ <head>
+ <meta charset="utf-8">
+ <meta name="viewport" content="width=device-width, initial-scale=1">
+ <title>Apache Aurora</title>
+ <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css">
+ <link href="/assets/css/main.css" rel="stylesheet">
+ <!-- Analytics -->
+ <script type="text/javascript">
+ var _gaq = _gaq || [];
+ _gaq.push(['_setAccount', 'UA-45879646-1']);
+ _gaq.push(['_setDomainName', 'apache.org']);
+ _gaq.push(['_trackPageview']);
+
+ (function() {
+ var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
+ ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
+ var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
+ })();
+ </script>
+ </head>
+ <body>
+
+ <div class="container-fluid section-header">
+ <div class="container">
+ <div class="nav nav-bar">
+ <a href="/"><img src="/assets/img/aurora_logo_white_bkg.svg" width="300" alt="Transparent Apache Aurora logo with dark background"/></a>
+ <ul class="nav navbar-nav navbar-right">
+ <li><a href="/documentation/latest/">Documentation</a></li>
+ <li><a href="/community/">Community</a></li>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/blog/">Blog</a></li>
+ </ul>
+ </div>
+ </div>
+</div>
+ <div class="container-fluid">
+ <div class="container content">
+ <h1 id="generating-test-resources">Generating test resources</h1>
+
+<h2 id="background">Background</h2>
+
+<p>The Aurora source repository and distributions contain several
+<a href="../src/test/resources/org/apache/thermos/root/checkpoints">binary files</a> to
+qualify the backwards-compatibility of thermos with checkpoint data. Since
+thermos persists state to disk, to be read by other components (the GC executor
+and the thermos observer), it is important that we have tests that prevent
+regressions affecting the ability to parse previously-written data.</p>
+
+<h2 id="generating-test-files">Generating test files</h2>
+
+<p>The files included represent persisted checkpoints that exercise different
+features of thermos. The existing files should not be modified unless
+we are accepting backwards incompatibility, such as with a major release.</p>
+
+<p>It is not practical to write source code to generate these files on the fly,
+as source would be vulnerable to drift (e.g. due to refactoring) in ways
+that would undermine the goal of ensuring backwards compatibility.</p>
+
+<p>The most common reason to add a new checkpoint file would be to provide
+coverage for new thermos features that alter the data format. This is
+accomplished by writing and running a
+<a href="/documentation/latest/configuration-reference/">job configuration</a> that exercises the feature, and
+copying the checkpoint file from the sandbox directory, by default this is
+<code>/var/run/thermos/checkpoints/<aurora task id></code>.</p>
+
+ </div>
+ </div>
+
+ <div class="container-fluid section-footer buffer">
+ <div class="container">
+ <div class="row">
+ <div class="col-md-2 col-md-offset-1"><h3>Quick Links</h3>
+ <ul>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/community/">Mailing Lists</a></li>
+ <li><a href="http://issues.apache.org/jira/browse/AURORA">Issue Tracking</a></li>
+ <li><a href="/documentation/latest/contributing/">How To Contribute</a></li>
+ </ul>
+ </div>
+ <div class="col-md-2"><h3>The ASF</h3>
+ <ul>
+ <li><a href="http://www.apache.org/licenses/">License</a></li>
+ <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+ <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
+ <li><a href="http://www.apache.org/security/">Security</a></li>
+ </ul>
+ </div>
+ <div class="col-md-6">
+ <p class="disclaimer">Apache Aurora is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.</p>
+ <p class="disclaimer">Copyright 2014 <a href="http://www.apache.org/">Apache Software Foundation</a>. Licensed under the <a href="http://www.apache.org/licenses/">Apache License v2.0</a>. The <a href="https://www.flickr.com/photos/trondk/12706051375/">Aurora Borealis IX photo</a> displayed on the homepage is available under a <a href="https://creativecommons.org/licenses/by-nc-nd/2.0/">Creative Commons BY-NC-ND 2.0 license</a>. Apache, Apache Aurora, and the Apache feather logo are trademarks of The Apache Software Foundation.</p>
+ </div>
+ </div>
+ </div>
+ </body>
+</html>
\ No newline at end of file
[17/18] incubator-aurora-website git commit: Initial move of website
over to git
Posted by jf...@apache.org.
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/publish/assets/js/bootstrap.js
----------------------------------------------------------------------
diff --git a/publish/assets/js/bootstrap.js b/publish/assets/js/bootstrap.js
new file mode 100644
index 0000000..f25c81e
--- /dev/null
+++ b/publish/assets/js/bootstrap.js
@@ -0,0 +1,2281 @@
+/* ===================================================
+ * bootstrap-transition.js v2.3.2
+ * http://getbootstrap.com/2.3.2/javascript.html#transitions
+ * ===================================================
+ * Copyright 2013 Twitter, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ========================================================== */
+
+
+
+!function ($) {
+
+ "use strict"; // jshint ;_;
+
+
+ /* CSS TRANSITION SUPPORT (http://www.modernizr.com/)
+ * ======================================================= */
+
+ $(function () {
+
+ $.support.transition = (function () {
+
+ var transitionEnd = (function () {
+
+ var el = document.createElement('bootstrap')
+ , transEndEventNames = {
+ 'WebkitTransition' : 'webkitTransitionEnd'
+ , 'MozTransition' : 'transitionend'
+ , 'OTransition' : 'oTransitionEnd otransitionend'
+ , 'transition' : 'transitionend'
+ }
+ , name
+
+ for (name in transEndEventNames){
+ if (el.style[name] !== undefined) {
+ return transEndEventNames[name]
+ }
+ }
+
+ }())
+
+ return transitionEnd && {
+ end: transitionEnd
+ }
+
+ })()
+
+ })
+
+}(window.jQuery);/* ==========================================================
+ * bootstrap-alert.js v2.3.2
+ * http://getbootstrap.com/2.3.2/javascript.html#alerts
+ * ==========================================================
+ * Copyright 2013 Twitter, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ========================================================== */
+
+
+!function ($) {
+
+ "use strict"; // jshint ;_;
+
+
+ /* ALERT CLASS DEFINITION
+ * ====================== */
+
+ var dismiss = '[data-dismiss="alert"]'
+ , Alert = function (el) {
+ $(el).on('click', dismiss, this.close)
+ }
+
+ Alert.prototype.close = function (e) {
+ var $this = $(this)
+ , selector = $this.attr('data-target')
+ , $parent
+
+ if (!selector) {
+ selector = $this.attr('href')
+ selector = selector && selector.replace(/.*(?=#[^\s]*$)/, '') //strip for ie7
+ }
+
+ $parent = $(selector)
+
+ e && e.preventDefault()
+
+ $parent.length || ($parent = $this.hasClass('alert') ? $this : $this.parent())
+
+ $parent.trigger(e = $.Event('close'))
+
+ if (e.isDefaultPrevented()) return
+
+ $parent.removeClass('in')
+
+ function removeElement() {
+ $parent
+ .trigger('closed')
+ .remove()
+ }
+
+ $.support.transition && $parent.hasClass('fade') ?
+ $parent.on($.support.transition.end, removeElement) :
+ removeElement()
+ }
+
+
+ /* ALERT PLUGIN DEFINITION
+ * ======================= */
+
+ var old = $.fn.alert
+
+ $.fn.alert = function (option) {
+ return this.each(function () {
+ var $this = $(this)
+ , data = $this.data('alert')
+ if (!data) $this.data('alert', (data = new Alert(this)))
+ if (typeof option == 'string') data[option].call($this)
+ })
+ }
+
+ $.fn.alert.Constructor = Alert
+
+
+ /* ALERT NO CONFLICT
+ * ================= */
+
+ $.fn.alert.noConflict = function () {
+ $.fn.alert = old
+ return this
+ }
+
+
+ /* ALERT DATA-API
+ * ============== */
+
+ $(document).on('click.alert.data-api', dismiss, Alert.prototype.close)
+
+}(window.jQuery);/* ============================================================
+ * bootstrap-button.js v2.3.2
+ * http://getbootstrap.com/2.3.2/javascript.html#buttons
+ * ============================================================
+ * Copyright 2013 Twitter, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============================================================ */
+
+
+!function ($) {
+
+ "use strict"; // jshint ;_;
+
+
+ /* BUTTON PUBLIC CLASS DEFINITION
+ * ============================== */
+
+ var Button = function (element, options) {
+ this.$element = $(element)
+ this.options = $.extend({}, $.fn.button.defaults, options)
+ }
+
+ Button.prototype.setState = function (state) {
+ var d = 'disabled'
+ , $el = this.$element
+ , data = $el.data()
+ , val = $el.is('input') ? 'val' : 'html'
+
+ state = state + 'Text'
+ data.resetText || $el.data('resetText', $el[val]())
+
+ $el[val](data[state] || this.options[state])
+
+ // push to event loop to allow forms to submit
+ setTimeout(function () {
+ state == 'loadingText' ?
+ $el.addClass(d).attr(d, d) :
+ $el.removeClass(d).removeAttr(d)
+ }, 0)
+ }
+
+ Button.prototype.toggle = function () {
+ var $parent = this.$element.closest('[data-toggle="buttons-radio"]')
+
+ $parent && $parent
+ .find('.active')
+ .removeClass('active')
+
+ this.$element.toggleClass('active')
+ }
+
+
+ /* BUTTON PLUGIN DEFINITION
+ * ======================== */
+
+ var old = $.fn.button
+
+ $.fn.button = function (option) {
+ return this.each(function () {
+ var $this = $(this)
+ , data = $this.data('button')
+ , options = typeof option == 'object' && option
+ if (!data) $this.data('button', (data = new Button(this, options)))
+ if (option == 'toggle') data.toggle()
+ else if (option) data.setState(option)
+ })
+ }
+
+ $.fn.button.defaults = {
+ loadingText: 'loading...'
+ }
+
+ $.fn.button.Constructor = Button
+
+
+ /* BUTTON NO CONFLICT
+ * ================== */
+
+ $.fn.button.noConflict = function () {
+ $.fn.button = old
+ return this
+ }
+
+
+ /* BUTTON DATA-API
+ * =============== */
+
+ $(document).on('click.button.data-api', '[data-toggle^=button]', function (e) {
+ var $btn = $(e.target)
+ if (!$btn.hasClass('btn')) $btn = $btn.closest('.btn')
+ $btn.button('toggle')
+ })
+
+}(window.jQuery);/* ==========================================================
+ * bootstrap-carousel.js v2.3.2
+ * http://getbootstrap.com/2.3.2/javascript.html#carousel
+ * ==========================================================
+ * Copyright 2013 Twitter, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ========================================================== */
+
+
+!function ($) {
+
+ "use strict"; // jshint ;_;
+
+
+ /* CAROUSEL CLASS DEFINITION
+ * ========================= */
+
+ var Carousel = function (element, options) {
+ this.$element = $(element)
+ this.$indicators = this.$element.find('.carousel-indicators')
+ this.options = options
+ this.options.pause == 'hover' && this.$element
+ .on('mouseenter', $.proxy(this.pause, this))
+ .on('mouseleave', $.proxy(this.cycle, this))
+ }
+
+ Carousel.prototype = {
+
+ cycle: function (e) {
+ if (!e) this.paused = false
+ if (this.interval) clearInterval(this.interval);
+ this.options.interval
+ && !this.paused
+ && (this.interval = setInterval($.proxy(this.next, this), this.options.interval))
+ return this
+ }
+
+ , getActiveIndex: function () {
+ this.$active = this.$element.find('.item.active')
+ this.$items = this.$active.parent().children()
+ return this.$items.index(this.$active)
+ }
+
+ , to: function (pos) {
+ var activeIndex = this.getActiveIndex()
+ , that = this
+
+ if (pos > (this.$items.length - 1) || pos < 0) return
+
+ if (this.sliding) {
+ return this.$element.one('slid', function () {
+ that.to(pos)
+ })
+ }
+
+ if (activeIndex == pos) {
+ return this.pause().cycle()
+ }
+
+ return this.slide(pos > activeIndex ? 'next' : 'prev', $(this.$items[pos]))
+ }
+
+ , pause: function (e) {
+ if (!e) this.paused = true
+ if (this.$element.find('.next, .prev').length && $.support.transition.end) {
+ this.$element.trigger($.support.transition.end)
+ this.cycle(true)
+ }
+ clearInterval(this.interval)
+ this.interval = null
+ return this
+ }
+
+ , next: function () {
+ if (this.sliding) return
+ return this.slide('next')
+ }
+
+ , prev: function () {
+ if (this.sliding) return
+ return this.slide('prev')
+ }
+
+ , slide: function (type, next) {
+ var $active = this.$element.find('.item.active')
+ , $next = next || $active[type]()
+ , isCycling = this.interval
+ , direction = type == 'next' ? 'left' : 'right'
+ , fallback = type == 'next' ? 'first' : 'last'
+ , that = this
+ , e
+
+ this.sliding = true
+
+ isCycling && this.pause()
+
+ $next = $next.length ? $next : this.$element.find('.item')[fallback]()
+
+ e = $.Event('slide', {
+ relatedTarget: $next[0]
+ , direction: direction
+ })
+
+ if ($next.hasClass('active')) return
+
+ if (this.$indicators.length) {
+ this.$indicators.find('.active').removeClass('active')
+ this.$element.one('slid', function () {
+ var $nextIndicator = $(that.$indicators.children()[that.getActiveIndex()])
+ $nextIndicator && $nextIndicator.addClass('active')
+ })
+ }
+
+ if ($.support.transition && this.$element.hasClass('slide')) {
+ this.$element.trigger(e)
+ if (e.isDefaultPrevented()) return
+ $next.addClass(type)
+ $next[0].offsetWidth // force reflow
+ $active.addClass(direction)
+ $next.addClass(direction)
+ this.$element.one($.support.transition.end, function () {
+ $next.removeClass([type, direction].join(' ')).addClass('active')
+ $active.removeClass(['active', direction].join(' '))
+ that.sliding = false
+ setTimeout(function () { that.$element.trigger('slid') }, 0)
+ })
+ } else {
+ this.$element.trigger(e)
+ if (e.isDefaultPrevented()) return
+ $active.removeClass('active')
+ $next.addClass('active')
+ this.sliding = false
+ this.$element.trigger('slid')
+ }
+
+ isCycling && this.cycle()
+
+ return this
+ }
+
+ }
+
+
+ /* CAROUSEL PLUGIN DEFINITION
+ * ========================== */
+
+ var old = $.fn.carousel
+
+ $.fn.carousel = function (option) {
+ return this.each(function () {
+ var $this = $(this)
+ , data = $this.data('carousel')
+ , options = $.extend({}, $.fn.carousel.defaults, typeof option == 'object' && option)
+ , action = typeof option == 'string' ? option : options.slide
+ if (!data) $this.data('carousel', (data = new Carousel(this, options)))
+ if (typeof option == 'number') data.to(option)
+ else if (action) data[action]()
+ else if (options.interval) data.pause().cycle()
+ })
+ }
+
+ $.fn.carousel.defaults = {
+ interval: 5000
+ , pause: 'hover'
+ }
+
+ $.fn.carousel.Constructor = Carousel
+
+
+ /* CAROUSEL NO CONFLICT
+ * ==================== */
+
+ $.fn.carousel.noConflict = function () {
+ $.fn.carousel = old
+ return this
+ }
+
+ /* CAROUSEL DATA-API
+ * ================= */
+
+ $(document).on('click.carousel.data-api', '[data-slide], [data-slide-to]', function (e) {
+ var $this = $(this), href
+ , $target = $($this.attr('data-target') || (href = $this.attr('href')) && href.replace(/.*(?=#[^\s]+$)/, '')) //strip for ie7
+ , options = $.extend({}, $target.data(), $this.data())
+ , slideIndex
+
+ $target.carousel(options)
+
+ if (slideIndex = $this.attr('data-slide-to')) {
+ $target.data('carousel').pause().to(slideIndex).cycle()
+ }
+
+ e.preventDefault()
+ })
+
+}(window.jQuery);/* =============================================================
+ * bootstrap-collapse.js v2.3.2
+ * http://getbootstrap.com/2.3.2/javascript.html#collapse
+ * =============================================================
+ * Copyright 2013 Twitter, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============================================================ */
+
+
+!function ($) {
+
+ "use strict"; // jshint ;_;
+
+
+ /* COLLAPSE PUBLIC CLASS DEFINITION
+ * ================================ */
+
+ var Collapse = function (element, options) {
+ this.$element = $(element)
+ this.options = $.extend({}, $.fn.collapse.defaults, options)
+
+ if (this.options.parent) {
+ this.$parent = $(this.options.parent)
+ }
+
+ this.options.toggle && this.toggle()
+ }
+
+ Collapse.prototype = {
+
+ constructor: Collapse
+
+ , dimension: function () {
+ var hasWidth = this.$element.hasClass('width')
+ return hasWidth ? 'width' : 'height'
+ }
+
+ , show: function () {
+ var dimension
+ , scroll
+ , actives
+ , hasData
+
+ if (this.transitioning || this.$element.hasClass('in')) return
+
+ dimension = this.dimension()
+ scroll = $.camelCase(['scroll', dimension].join('-'))
+ actives = this.$parent && this.$parent.find('> .accordion-group > .in')
+
+ if (actives && actives.length) {
+ hasData = actives.data('collapse')
+ if (hasData && hasData.transitioning) return
+ actives.collapse('hide')
+ hasData || actives.data('collapse', null)
+ }
+
+ this.$element[dimension](0)
+ this.transition('addClass', $.Event('show'), 'shown')
+ $.support.transition && this.$element[dimension](this.$element[0][scroll])
+ }
+
+ , hide: function () {
+ var dimension
+ if (this.transitioning || !this.$element.hasClass('in')) return
+ dimension = this.dimension()
+ this.reset(this.$element[dimension]())
+ this.transition('removeClass', $.Event('hide'), 'hidden')
+ this.$element[dimension](0)
+ }
+
+ , reset: function (size) {
+ var dimension = this.dimension()
+
+ this.$element
+ .removeClass('collapse')
+ [dimension](size || 'auto')
+ [0].offsetWidth
+
+ this.$element[size !== null ? 'addClass' : 'removeClass']('collapse')
+
+ return this
+ }
+
+ , transition: function (method, startEvent, completeEvent) {
+ var that = this
+ , complete = function () {
+ if (startEvent.type == 'show') that.reset()
+ that.transitioning = 0
+ that.$element.trigger(completeEvent)
+ }
+
+ this.$element.trigger(startEvent)
+
+ if (startEvent.isDefaultPrevented()) return
+
+ this.transitioning = 1
+
+ this.$element[method]('in')
+
+ $.support.transition && this.$element.hasClass('collapse') ?
+ this.$element.one($.support.transition.end, complete) :
+ complete()
+ }
+
+ , toggle: function () {
+ this[this.$element.hasClass('in') ? 'hide' : 'show']()
+ }
+
+ }
+
+
+ /* COLLAPSE PLUGIN DEFINITION
+ * ========================== */
+
+ var old = $.fn.collapse
+
+ $.fn.collapse = function (option) {
+ return this.each(function () {
+ var $this = $(this)
+ , data = $this.data('collapse')
+ , options = $.extend({}, $.fn.collapse.defaults, $this.data(), typeof option == 'object' && option)
+ if (!data) $this.data('collapse', (data = new Collapse(this, options)))
+ if (typeof option == 'string') data[option]()
+ })
+ }
+
+ $.fn.collapse.defaults = {
+ toggle: true
+ }
+
+ $.fn.collapse.Constructor = Collapse
+
+
+ /* COLLAPSE NO CONFLICT
+ * ==================== */
+
+ $.fn.collapse.noConflict = function () {
+ $.fn.collapse = old
+ return this
+ }
+
+
+ /* COLLAPSE DATA-API
+ * ================= */
+
+ $(document).on('click.collapse.data-api', '[data-toggle=collapse]', function (e) {
+ var $this = $(this), href
+ , target = $this.attr('data-target')
+ || e.preventDefault()
+ || (href = $this.attr('href')) && href.replace(/.*(?=#[^\s]+$)/, '') //strip for ie7
+ , option = $(target).data('collapse') ? 'toggle' : $this.data()
+ $this[$(target).hasClass('in') ? 'addClass' : 'removeClass']('collapsed')
+ $(target).collapse(option)
+ })
+
+}(window.jQuery);/* ============================================================
+ * bootstrap-dropdown.js v2.3.2
+ * http://getbootstrap.com/2.3.2/javascript.html#dropdowns
+ * ============================================================
+ * Copyright 2013 Twitter, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============================================================ */
+
+
+!function ($) {
+
+ "use strict"; // jshint ;_;
+
+
+ /* DROPDOWN CLASS DEFINITION
+ * ========================= */
+
+ var toggle = '[data-toggle=dropdown]'
+ , Dropdown = function (element) {
+ var $el = $(element).on('click.dropdown.data-api', this.toggle)
+ $('html').on('click.dropdown.data-api', function () {
+ $el.parent().removeClass('open')
+ })
+ }
+
+ Dropdown.prototype = {
+
+ constructor: Dropdown
+
+ , toggle: function (e) {
+ var $this = $(this)
+ , $parent
+ , isActive
+
+ if ($this.is('.disabled, :disabled')) return
+
+ $parent = getParent($this)
+
+ isActive = $parent.hasClass('open')
+
+ clearMenus()
+
+ if (!isActive) {
+ if ('ontouchstart' in document.documentElement) {
+ // if mobile we we use a backdrop because click events don't delegate
+ $('<div class="dropdown-backdrop"/>').insertBefore($(this)).on('click', clearMenus)
+ }
+ $parent.toggleClass('open')
+ }
+
+ $this.focus()
+
+ return false
+ }
+
+ , keydown: function (e) {
+ var $this
+ , $items
+ , $active
+ , $parent
+ , isActive
+ , index
+
+ if (!/(38|40|27)/.test(e.keyCode)) return
+
+ $this = $(this)
+
+ e.preventDefault()
+ e.stopPropagation()
+
+ if ($this.is('.disabled, :disabled')) return
+
+ $parent = getParent($this)
+
+ isActive = $parent.hasClass('open')
+
+ if (!isActive || (isActive && e.keyCode == 27)) {
+ if (e.which == 27) $parent.find(toggle).focus()
+ return $this.click()
+ }
+
+ $items = $('[role=menu] li:not(.divider):visible a', $parent)
+
+ if (!$items.length) return
+
+ index = $items.index($items.filter(':focus'))
+
+ if (e.keyCode == 38 && index > 0) index-- // up
+ if (e.keyCode == 40 && index < $items.length - 1) index++ // down
+ if (!~index) index = 0
+
+ $items
+ .eq(index)
+ .focus()
+ }
+
+ }
+
+ function clearMenus() {
+ $('.dropdown-backdrop').remove()
+ $(toggle).each(function () {
+ getParent($(this)).removeClass('open')
+ })
+ }
+
+ function getParent($this) {
+ var selector = $this.attr('data-target')
+ , $parent
+
+ if (!selector) {
+ selector = $this.attr('href')
+ selector = selector && /#/.test(selector) && selector.replace(/.*(?=#[^\s]*$)/, '') //strip for ie7
+ }
+
+ $parent = selector && $(selector)
+
+ if (!$parent || !$parent.length) $parent = $this.parent()
+
+ return $parent
+ }
+
+
+ /* DROPDOWN PLUGIN DEFINITION
+ * ========================== */
+
+ var old = $.fn.dropdown
+
+ $.fn.dropdown = function (option) {
+ return this.each(function () {
+ var $this = $(this)
+ , data = $this.data('dropdown')
+ if (!data) $this.data('dropdown', (data = new Dropdown(this)))
+ if (typeof option == 'string') data[option].call($this)
+ })
+ }
+
+ $.fn.dropdown.Constructor = Dropdown
+
+
+ /* DROPDOWN NO CONFLICT
+ * ==================== */
+
+ $.fn.dropdown.noConflict = function () {
+ $.fn.dropdown = old
+ return this
+ }
+
+
+ /* APPLY TO STANDARD DROPDOWN ELEMENTS
+ * =================================== */
+
+ $(document)
+ .on('click.dropdown.data-api', clearMenus)
+ .on('click.dropdown.data-api', '.dropdown form', function (e) { e.stopPropagation() })
+ .on('click.dropdown.data-api' , toggle, Dropdown.prototype.toggle)
+ .on('keydown.dropdown.data-api', toggle + ', [role=menu]' , Dropdown.prototype.keydown)
+
+}(window.jQuery);
+/* =========================================================
+ * bootstrap-modal.js v2.3.2
+ * http://getbootstrap.com/2.3.2/javascript.html#modals
+ * =========================================================
+ * Copyright 2013 Twitter, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ========================================================= */
+
+
+!function ($) {
+
+ "use strict"; // jshint ;_;
+
+
+ /* MODAL CLASS DEFINITION
+ * ====================== */
+
+ var Modal = function (element, options) {
+ this.options = options
+ this.$element = $(element)
+ .delegate('[data-dismiss="modal"]', 'click.dismiss.modal', $.proxy(this.hide, this))
+ this.options.remote && this.$element.find('.modal-body').load(this.options.remote)
+ }
+
+ Modal.prototype = {
+
+ constructor: Modal
+
+ , toggle: function () {
+ return this[!this.isShown ? 'show' : 'hide']()
+ }
+
+ , show: function () {
+ var that = this
+ , e = $.Event('show')
+
+ this.$element.trigger(e)
+
+ if (this.isShown || e.isDefaultPrevented()) return
+
+ this.isShown = true
+
+ this.escape()
+
+ this.backdrop(function () {
+ var transition = $.support.transition && that.$element.hasClass('fade')
+
+ if (!that.$element.parent().length) {
+ that.$element.appendTo(document.body) //don't move modals dom position
+ }
+
+ that.$element.show()
+
+ if (transition) {
+ that.$element[0].offsetWidth // force reflow
+ }
+
+ that.$element
+ .addClass('in')
+ .attr('aria-hidden', false)
+
+ that.enforceFocus()
+
+ transition ?
+ that.$element.one($.support.transition.end, function () { that.$element.focus().trigger('shown') }) :
+ that.$element.focus().trigger('shown')
+
+ })
+ }
+
+ , hide: function (e) {
+ e && e.preventDefault()
+
+ var that = this
+
+ e = $.Event('hide')
+
+ this.$element.trigger(e)
+
+ if (!this.isShown || e.isDefaultPrevented()) return
+
+ this.isShown = false
+
+ this.escape()
+
+ $(document).off('focusin.modal')
+
+ this.$element
+ .removeClass('in')
+ .attr('aria-hidden', true)
+
+ $.support.transition && this.$element.hasClass('fade') ?
+ this.hideWithTransition() :
+ this.hideModal()
+ }
+
+ , enforceFocus: function () {
+ var that = this
+ $(document).on('focusin.modal', function (e) {
+ if (that.$element[0] !== e.target && !that.$element.has(e.target).length) {
+ that.$element.focus()
+ }
+ })
+ }
+
+ , escape: function () {
+ var that = this
+ if (this.isShown && this.options.keyboard) {
+ this.$element.on('keyup.dismiss.modal', function ( e ) {
+ e.which == 27 && that.hide()
+ })
+ } else if (!this.isShown) {
+ this.$element.off('keyup.dismiss.modal')
+ }
+ }
+
+ , hideWithTransition: function () {
+ var that = this
+ , timeout = setTimeout(function () {
+ that.$element.off($.support.transition.end)
+ that.hideModal()
+ }, 500)
+
+ this.$element.one($.support.transition.end, function () {
+ clearTimeout(timeout)
+ that.hideModal()
+ })
+ }
+
+ , hideModal: function () {
+ var that = this
+ this.$element.hide()
+ this.backdrop(function () {
+ that.removeBackdrop()
+ that.$element.trigger('hidden')
+ })
+ }
+
+ , removeBackdrop: function () {
+ this.$backdrop && this.$backdrop.remove()
+ this.$backdrop = null
+ }
+
+ , backdrop: function (callback) {
+ var that = this
+ , animate = this.$element.hasClass('fade') ? 'fade' : ''
+
+ if (this.isShown && this.options.backdrop) {
+ var doAnimate = $.support.transition && animate
+
+ this.$backdrop = $('<div class="modal-backdrop ' + animate + '" />')
+ .appendTo(document.body)
+
+ this.$backdrop.click(
+ this.options.backdrop == 'static' ?
+ $.proxy(this.$element[0].focus, this.$element[0])
+ : $.proxy(this.hide, this)
+ )
+
+ if (doAnimate) this.$backdrop[0].offsetWidth // force reflow
+
+ this.$backdrop.addClass('in')
+
+ if (!callback) return
+
+ doAnimate ?
+ this.$backdrop.one($.support.transition.end, callback) :
+ callback()
+
+ } else if (!this.isShown && this.$backdrop) {
+ this.$backdrop.removeClass('in')
+
+ $.support.transition && this.$element.hasClass('fade')?
+ this.$backdrop.one($.support.transition.end, callback) :
+ callback()
+
+ } else if (callback) {
+ callback()
+ }
+ }
+ }
+
+
+ /* MODAL PLUGIN DEFINITION
+ * ======================= */
+
+ var old = $.fn.modal
+
+ $.fn.modal = function (option) {
+ return this.each(function () {
+ var $this = $(this)
+ , data = $this.data('modal')
+ , options = $.extend({}, $.fn.modal.defaults, $this.data(), typeof option == 'object' && option)
+ if (!data) $this.data('modal', (data = new Modal(this, options)))
+ if (typeof option == 'string') data[option]()
+ else if (options.show) data.show()
+ })
+ }
+
+ $.fn.modal.defaults = {
+ backdrop: true
+ , keyboard: true
+ , show: true
+ }
+
+ $.fn.modal.Constructor = Modal
+
+
+ /* MODAL NO CONFLICT
+ * ================= */
+
+ $.fn.modal.noConflict = function () {
+ $.fn.modal = old
+ return this
+ }
+
+
+ /* MODAL DATA-API
+ * ============== */
+
+ $(document).on('click.modal.data-api', '[data-toggle="modal"]', function (e) {
+ var $this = $(this)
+ , href = $this.attr('href')
+ , $target = $($this.attr('data-target') || (href && href.replace(/.*(?=#[^\s]+$)/, ''))) //strip for ie7
+ , option = $target.data('modal') ? 'toggle' : $.extend({ remote:!/#/.test(href) && href }, $target.data(), $this.data())
+
+ e.preventDefault()
+
+ $target
+ .modal(option)
+ .one('hide', function () {
+ $this.focus()
+ })
+ })
+
+}(window.jQuery);
+/* ===========================================================
+ * bootstrap-tooltip.js v2.3.2
+ * http://getbootstrap.com/2.3.2/javascript.html#tooltips
+ * Inspired by the original jQuery.tipsy by Jason Frame
+ * ===========================================================
+ * Copyright 2013 Twitter, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ========================================================== */
+
+
+!function ($) {
+
+ "use strict"; // jshint ;_;
+
+
+ /* TOOLTIP PUBLIC CLASS DEFINITION
+ * =============================== */
+
+ var Tooltip = function (element, options) {
+ this.init('tooltip', element, options)
+ }
+
+ Tooltip.prototype = {
+
+ constructor: Tooltip
+
+ , init: function (type, element, options) {
+ var eventIn
+ , eventOut
+ , triggers
+ , trigger
+ , i
+
+ this.type = type
+ this.$element = $(element)
+ this.options = this.getOptions(options)
+ this.enabled = true
+
+ triggers = this.options.trigger.split(' ')
+
+ for (i = triggers.length; i--;) {
+ trigger = triggers[i]
+ if (trigger == 'click') {
+ this.$element.on('click.' + this.type, this.options.selector, $.proxy(this.toggle, this))
+ } else if (trigger != 'manual') {
+ eventIn = trigger == 'hover' ? 'mouseenter' : 'focus'
+ eventOut = trigger == 'hover' ? 'mouseleave' : 'blur'
+ this.$element.on(eventIn + '.' + this.type, this.options.selector, $.proxy(this.enter, this))
+ this.$element.on(eventOut + '.' + this.type, this.options.selector, $.proxy(this.leave, this))
+ }
+ }
+
+ this.options.selector ?
+ (this._options = $.extend({}, this.options, { trigger: 'manual', selector: '' })) :
+ this.fixTitle()
+ }
+
+ , getOptions: function (options) {
+ options = $.extend({}, $.fn[this.type].defaults, this.$element.data(), options)
+
+ if (options.delay && typeof options.delay == 'number') {
+ options.delay = {
+ show: options.delay
+ , hide: options.delay
+ }
+ }
+
+ return options
+ }
+
+ , enter: function (e) {
+ var defaults = $.fn[this.type].defaults
+ , options = {}
+ , self
+
+ this._options && $.each(this._options, function (key, value) {
+ if (defaults[key] != value) options[key] = value
+ }, this)
+
+ self = $(e.currentTarget)[this.type](options).data(this.type)
+
+ if (!self.options.delay || !self.options.delay.show) return self.show()
+
+ clearTimeout(this.timeout)
+ self.hoverState = 'in'
+ this.timeout = setTimeout(function() {
+ if (self.hoverState == 'in') self.show()
+ }, self.options.delay.show)
+ }
+
+ , leave: function (e) {
+ var self = $(e.currentTarget)[this.type](this._options).data(this.type)
+
+ if (this.timeout) clearTimeout(this.timeout)
+ if (!self.options.delay || !self.options.delay.hide) return self.hide()
+
+ self.hoverState = 'out'
+ this.timeout = setTimeout(function() {
+ if (self.hoverState == 'out') self.hide()
+ }, self.options.delay.hide)
+ }
+
+ , show: function () {
+ var $tip
+ , pos
+ , actualWidth
+ , actualHeight
+ , placement
+ , tp
+ , e = $.Event('show')
+
+ if (this.hasContent() && this.enabled) {
+ this.$element.trigger(e)
+ if (e.isDefaultPrevented()) return
+ $tip = this.tip()
+ this.setContent()
+
+ if (this.options.animation) {
+ $tip.addClass('fade')
+ }
+
+ placement = typeof this.options.placement == 'function' ?
+ this.options.placement.call(this, $tip[0], this.$element[0]) :
+ this.options.placement
+
+ $tip
+ .detach()
+ .css({ top: 0, left: 0, display: 'block' })
+
+ this.options.container ? $tip.appendTo(this.options.container) : $tip.insertAfter(this.$element)
+
+ pos = this.getPosition()
+
+ actualWidth = $tip[0].offsetWidth
+ actualHeight = $tip[0].offsetHeight
+
+ switch (placement) {
+ case 'bottom':
+ tp = {top: pos.top + pos.height, left: pos.left + pos.width / 2 - actualWidth / 2}
+ break
+ case 'top':
+ tp = {top: pos.top - actualHeight, left: pos.left + pos.width / 2 - actualWidth / 2}
+ break
+ case 'left':
+ tp = {top: pos.top + pos.height / 2 - actualHeight / 2, left: pos.left - actualWidth}
+ break
+ case 'right':
+ tp = {top: pos.top + pos.height / 2 - actualHeight / 2, left: pos.left + pos.width}
+ break
+ }
+
+ this.applyPlacement(tp, placement)
+ this.$element.trigger('shown')
+ }
+ }
+
+ , applyPlacement: function(offset, placement){
+ var $tip = this.tip()
+ , width = $tip[0].offsetWidth
+ , height = $tip[0].offsetHeight
+ , actualWidth
+ , actualHeight
+ , delta
+ , replace
+
+ $tip
+ .offset(offset)
+ .addClass(placement)
+ .addClass('in')
+
+ actualWidth = $tip[0].offsetWidth
+ actualHeight = $tip[0].offsetHeight
+
+ if (placement == 'top' && actualHeight != height) {
+ offset.top = offset.top + height - actualHeight
+ replace = true
+ }
+
+ if (placement == 'bottom' || placement == 'top') {
+ delta = 0
+
+ if (offset.left < 0){
+ delta = offset.left * -2
+ offset.left = 0
+ $tip.offset(offset)
+ actualWidth = $tip[0].offsetWidth
+ actualHeight = $tip[0].offsetHeight
+ }
+
+ this.replaceArrow(delta - width + actualWidth, actualWidth, 'left')
+ } else {
+ this.replaceArrow(actualHeight - height, actualHeight, 'top')
+ }
+
+ if (replace) $tip.offset(offset)
+ }
+
+ , replaceArrow: function(delta, dimension, position){
+ this
+ .arrow()
+ .css(position, delta ? (50 * (1 - delta / dimension) + "%") : '')
+ }
+
+ , setContent: function () {
+ var $tip = this.tip()
+ , title = this.getTitle()
+
+ $tip.find('.tooltip-inner')[this.options.html ? 'html' : 'text'](title)
+ $tip.removeClass('fade in top bottom left right')
+ }
+
+ , hide: function () {
+ var that = this
+ , $tip = this.tip()
+ , e = $.Event('hide')
+
+ this.$element.trigger(e)
+ if (e.isDefaultPrevented()) return
+
+ $tip.removeClass('in')
+
+ function removeWithAnimation() {
+ var timeout = setTimeout(function () {
+ $tip.off($.support.transition.end).detach()
+ }, 500)
+
+ $tip.one($.support.transition.end, function () {
+ clearTimeout(timeout)
+ $tip.detach()
+ })
+ }
+
+ $.support.transition && this.$tip.hasClass('fade') ?
+ removeWithAnimation() :
+ $tip.detach()
+
+ this.$element.trigger('hidden')
+
+ return this
+ }
+
+ , fixTitle: function () {
+ var $e = this.$element
+ if ($e.attr('title') || typeof($e.attr('data-original-title')) != 'string') {
+ $e.attr('data-original-title', $e.attr('title') || '').attr('title', '')
+ }
+ }
+
+ , hasContent: function () {
+ return this.getTitle()
+ }
+
+ , getPosition: function () {
+ var el = this.$element[0]
+ return $.extend({}, (typeof el.getBoundingClientRect == 'function') ? el.getBoundingClientRect() : {
+ width: el.offsetWidth
+ , height: el.offsetHeight
+ }, this.$element.offset())
+ }
+
+ , getTitle: function () {
+ var title
+ , $e = this.$element
+ , o = this.options
+
+ title = $e.attr('data-original-title')
+ || (typeof o.title == 'function' ? o.title.call($e[0]) : o.title)
+
+ return title
+ }
+
+ , tip: function () {
+ return this.$tip = this.$tip || $(this.options.template)
+ }
+
+ , arrow: function(){
+ return this.$arrow = this.$arrow || this.tip().find(".tooltip-arrow")
+ }
+
+ , validate: function () {
+ if (!this.$element[0].parentNode) {
+ this.hide()
+ this.$element = null
+ this.options = null
+ }
+ }
+
+ , enable: function () {
+ this.enabled = true
+ }
+
+ , disable: function () {
+ this.enabled = false
+ }
+
+ , toggleEnabled: function () {
+ this.enabled = !this.enabled
+ }
+
+ , toggle: function (e) {
+ var self = e ? $(e.currentTarget)[this.type](this._options).data(this.type) : this
+ self.tip().hasClass('in') ? self.hide() : self.show()
+ }
+
+ , destroy: function () {
+ this.hide().$element.off('.' + this.type).removeData(this.type)
+ }
+
+ }
+
+
+ /* TOOLTIP PLUGIN DEFINITION
+ * ========================= */
+
+ var old = $.fn.tooltip
+
+ $.fn.tooltip = function ( option ) {
+ return this.each(function () {
+ var $this = $(this)
+ , data = $this.data('tooltip')
+ , options = typeof option == 'object' && option
+ if (!data) $this.data('tooltip', (data = new Tooltip(this, options)))
+ if (typeof option == 'string') data[option]()
+ })
+ }
+
+ $.fn.tooltip.Constructor = Tooltip
+
+ $.fn.tooltip.defaults = {
+ animation: true
+ , placement: 'top'
+ , selector: false
+ , template: '<div class="tooltip"><div class="tooltip-arrow"></div><div class="tooltip-inner"></div></div>'
+ , trigger: 'hover focus'
+ , title: ''
+ , delay: 0
+ , html: false
+ , container: false
+ }
+
+
+ /* TOOLTIP NO CONFLICT
+ * =================== */
+
+ $.fn.tooltip.noConflict = function () {
+ $.fn.tooltip = old
+ return this
+ }
+
+}(window.jQuery);
+/* ===========================================================
+ * bootstrap-popover.js v2.3.2
+ * http://getbootstrap.com/2.3.2/javascript.html#popovers
+ * ===========================================================
+ * Copyright 2013 Twitter, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * =========================================================== */
+
+
+!function ($) {
+
+ "use strict"; // jshint ;_;
+
+
+ /* POPOVER PUBLIC CLASS DEFINITION
+ * =============================== */
+
+ var Popover = function (element, options) {
+ this.init('popover', element, options)
+ }
+
+
+ /* NOTE: POPOVER EXTENDS BOOTSTRAP-TOOLTIP.js
+ ========================================== */
+
+ Popover.prototype = $.extend({}, $.fn.tooltip.Constructor.prototype, {
+
+ constructor: Popover
+
+ , setContent: function () {
+ var $tip = this.tip()
+ , title = this.getTitle()
+ , content = this.getContent()
+
+ $tip.find('.popover-title')[this.options.html ? 'html' : 'text'](title)
+ $tip.find('.popover-content')[this.options.html ? 'html' : 'text'](content)
+
+ $tip.removeClass('fade top bottom left right in')
+ }
+
+ , hasContent: function () {
+ return this.getTitle() || this.getContent()
+ }
+
+ , getContent: function () {
+ var content
+ , $e = this.$element
+ , o = this.options
+
+ content = (typeof o.content == 'function' ? o.content.call($e[0]) : o.content)
+ || $e.attr('data-content')
+
+ return content
+ }
+
+ , tip: function () {
+ if (!this.$tip) {
+ this.$tip = $(this.options.template)
+ }
+ return this.$tip
+ }
+
+ , destroy: function () {
+ this.hide().$element.off('.' + this.type).removeData(this.type)
+ }
+
+ })
+
+
+ /* POPOVER PLUGIN DEFINITION
+ * ======================= */
+
+ var old = $.fn.popover
+
+ $.fn.popover = function (option) {
+ return this.each(function () {
+ var $this = $(this)
+ , data = $this.data('popover')
+ , options = typeof option == 'object' && option
+ if (!data) $this.data('popover', (data = new Popover(this, options)))
+ if (typeof option == 'string') data[option]()
+ })
+ }
+
+ $.fn.popover.Constructor = Popover
+
+ $.fn.popover.defaults = $.extend({} , $.fn.tooltip.defaults, {
+ placement: 'right'
+ , trigger: 'click'
+ , content: ''
+ , template: '<div class="popover"><div class="arrow"></div><h3 class="popover-title"></h3><div class="popover-content"></div></div>'
+ })
+
+
+ /* POPOVER NO CONFLICT
+ * =================== */
+
+ $.fn.popover.noConflict = function () {
+ $.fn.popover = old
+ return this
+ }
+
+}(window.jQuery);
+/* =============================================================
+ * bootstrap-scrollspy.js v2.3.2
+ * http://getbootstrap.com/2.3.2/javascript.html#scrollspy
+ * =============================================================
+ * Copyright 2013 Twitter, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============================================================== */
+
+
+!function ($) {
+
+ "use strict"; // jshint ;_;
+
+
+ /* SCROLLSPY CLASS DEFINITION
+ * ========================== */
+
+ function ScrollSpy(element, options) {
+ var process = $.proxy(this.process, this)
+ , $element = $(element).is('body') ? $(window) : $(element)
+ , href
+ this.options = $.extend({}, $.fn.scrollspy.defaults, options)
+ this.$scrollElement = $element.on('scroll.scroll-spy.data-api', process)
+ this.selector = (this.options.target
+ || ((href = $(element).attr('href')) && href.replace(/.*(?=#[^\s]+$)/, '')) //strip for ie7
+ || '') + ' .nav li > a'
+ this.$body = $('body')
+ this.refresh()
+ this.process()
+ }
+
+ ScrollSpy.prototype = {
+
+ constructor: ScrollSpy
+
+ , refresh: function () {
+ var self = this
+ , $targets
+
+ this.offsets = $([])
+ this.targets = $([])
+
+ $targets = this.$body
+ .find(this.selector)
+ .map(function () {
+ var $el = $(this)
+ , href = $el.data('target') || $el.attr('href')
+ , $href = /^#\w/.test(href) && $(href)
+ return ( $href
+ && $href.length
+ && [[ $href.position().top + (!$.isWindow(self.$scrollElement.get(0)) && self.$scrollElement.scrollTop()), href ]] ) || null
+ })
+ .sort(function (a, b) { return a[0] - b[0] })
+ .each(function () {
+ self.offsets.push(this[0])
+ self.targets.push(this[1])
+ })
+ }
+
+ , process: function () {
+ var scrollTop = this.$scrollElement.scrollTop() + this.options.offset
+ , scrollHeight = this.$scrollElement[0].scrollHeight || this.$body[0].scrollHeight
+ , maxScroll = scrollHeight - this.$scrollElement.height()
+ , offsets = this.offsets
+ , targets = this.targets
+ , activeTarget = this.activeTarget
+ , i
+
+ if (scrollTop >= maxScroll) {
+ return activeTarget != (i = targets.last()[0])
+ && this.activate ( i )
+ }
+
+ for (i = offsets.length; i--;) {
+ activeTarget != targets[i]
+ && scrollTop >= offsets[i]
+ && (!offsets[i + 1] || scrollTop <= offsets[i + 1])
+ && this.activate( targets[i] )
+ }
+ }
+
+ , activate: function (target) {
+ var active
+ , selector
+
+ this.activeTarget = target
+
+ $(this.selector)
+ .parent('.active')
+ .removeClass('active')
+
+ selector = this.selector
+ + '[data-target="' + target + '"],'
+ + this.selector + '[href="' + target + '"]'
+
+ active = $(selector)
+ .parent('li')
+ .addClass('active')
+
+ if (active.parent('.dropdown-menu').length) {
+ active = active.closest('li.dropdown').addClass('active')
+ }
+
+ active.trigger('activate')
+ }
+
+ }
+
+
+ /* SCROLLSPY PLUGIN DEFINITION
+ * =========================== */
+
+ var old = $.fn.scrollspy
+
+ $.fn.scrollspy = function (option) {
+ return this.each(function () {
+ var $this = $(this)
+ , data = $this.data('scrollspy')
+ , options = typeof option == 'object' && option
+ if (!data) $this.data('scrollspy', (data = new ScrollSpy(this, options)))
+ if (typeof option == 'string') data[option]()
+ })
+ }
+
+ $.fn.scrollspy.Constructor = ScrollSpy
+
+ $.fn.scrollspy.defaults = {
+ offset: 10
+ }
+
+
+ /* SCROLLSPY NO CONFLICT
+ * ===================== */
+
+ $.fn.scrollspy.noConflict = function () {
+ $.fn.scrollspy = old
+ return this
+ }
+
+
+ /* SCROLLSPY DATA-API
+ * ================== */
+
+ $(window).on('load', function () {
+ $('[data-spy="scroll"]').each(function () {
+ var $spy = $(this)
+ $spy.scrollspy($spy.data())
+ })
+ })
+
+}(window.jQuery);/* ========================================================
+ * bootstrap-tab.js v2.3.2
+ * http://getbootstrap.com/2.3.2/javascript.html#tabs
+ * ========================================================
+ * Copyright 2013 Twitter, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ======================================================== */
+
+
+!function ($) {
+
+ "use strict"; // jshint ;_;
+
+
+ /* TAB CLASS DEFINITION
+ * ==================== */
+
+ var Tab = function (element) {
+ this.element = $(element)
+ }
+
+ Tab.prototype = {
+
+ constructor: Tab
+
+ , show: function () {
+ var $this = this.element
+ , $ul = $this.closest('ul:not(.dropdown-menu)')
+ , selector = $this.attr('data-target')
+ , previous
+ , $target
+ , e
+
+ if (!selector) {
+ selector = $this.attr('href')
+ selector = selector && selector.replace(/.*(?=#[^\s]*$)/, '') //strip for ie7
+ }
+
+ if ( $this.parent('li').hasClass('active') ) return
+
+ previous = $ul.find('.active:last a')[0]
+
+ e = $.Event('show', {
+ relatedTarget: previous
+ })
+
+ $this.trigger(e)
+
+ if (e.isDefaultPrevented()) return
+
+ $target = $(selector)
+
+ this.activate($this.parent('li'), $ul)
+ this.activate($target, $target.parent(), function () {
+ $this.trigger({
+ type: 'shown'
+ , relatedTarget: previous
+ })
+ })
+ }
+
+ , activate: function ( element, container, callback) {
+ var $active = container.find('> .active')
+ , transition = callback
+ && $.support.transition
+ && $active.hasClass('fade')
+
+ function next() {
+ $active
+ .removeClass('active')
+ .find('> .dropdown-menu > .active')
+ .removeClass('active')
+
+ element.addClass('active')
+
+ if (transition) {
+ element[0].offsetWidth // reflow for transition
+ element.addClass('in')
+ } else {
+ element.removeClass('fade')
+ }
+
+ if ( element.parent('.dropdown-menu') ) {
+ element.closest('li.dropdown').addClass('active')
+ }
+
+ callback && callback()
+ }
+
+ transition ?
+ $active.one($.support.transition.end, next) :
+ next()
+
+ $active.removeClass('in')
+ }
+ }
+
+
+ /* TAB PLUGIN DEFINITION
+ * ===================== */
+
+ var old = $.fn.tab
+
+ $.fn.tab = function ( option ) {
+ return this.each(function () {
+ var $this = $(this)
+ , data = $this.data('tab')
+ if (!data) $this.data('tab', (data = new Tab(this)))
+ if (typeof option == 'string') data[option]()
+ })
+ }
+
+ $.fn.tab.Constructor = Tab
+
+
+ /* TAB NO CONFLICT
+ * =============== */
+
+ $.fn.tab.noConflict = function () {
+ $.fn.tab = old
+ return this
+ }
+
+
+ /* TAB DATA-API
+ * ============ */
+
+ $(document).on('click.tab.data-api', '[data-toggle="tab"], [data-toggle="pill"]', function (e) {
+ e.preventDefault()
+ $(this).tab('show')
+ })
+
+}(window.jQuery);/* =============================================================
+ * bootstrap-typeahead.js v2.3.2
+ * http://getbootstrap.com/2.3.2/javascript.html#typeahead
+ * =============================================================
+ * Copyright 2013 Twitter, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============================================================ */
+
+
+!function($){
+
+ "use strict"; // jshint ;_;
+
+
+ /* TYPEAHEAD PUBLIC CLASS DEFINITION
+ * ================================= */
+
+ var Typeahead = function (element, options) {
+ this.$element = $(element)
+ this.options = $.extend({}, $.fn.typeahead.defaults, options)
+ this.matcher = this.options.matcher || this.matcher
+ this.sorter = this.options.sorter || this.sorter
+ this.highlighter = this.options.highlighter || this.highlighter
+ this.updater = this.options.updater || this.updater
+ this.source = this.options.source
+ this.$menu = $(this.options.menu)
+ this.shown = false
+ this.listen()
+ }
+
+ Typeahead.prototype = {
+
+ constructor: Typeahead
+
+ , select: function () {
+ var val = this.$menu.find('.active').attr('data-value')
+ this.$element
+ .val(this.updater(val))
+ .change()
+ return this.hide()
+ }
+
+ , updater: function (item) {
+ return item
+ }
+
+ , show: function () {
+ var pos = $.extend({}, this.$element.position(), {
+ height: this.$element[0].offsetHeight
+ })
+
+ this.$menu
+ .insertAfter(this.$element)
+ .css({
+ top: pos.top + pos.height
+ , left: pos.left
+ })
+ .show()
+
+ this.shown = true
+ return this
+ }
+
+ , hide: function () {
+ this.$menu.hide()
+ this.shown = false
+ return this
+ }
+
+ , lookup: function (event) {
+ var items
+
+ this.query = this.$element.val()
+
+ if (!this.query || this.query.length < this.options.minLength) {
+ return this.shown ? this.hide() : this
+ }
+
+ items = $.isFunction(this.source) ? this.source(this.query, $.proxy(this.process, this)) : this.source
+
+ return items ? this.process(items) : this
+ }
+
+ , process: function (items) {
+ var that = this
+
+ items = $.grep(items, function (item) {
+ return that.matcher(item)
+ })
+
+ items = this.sorter(items)
+
+ if (!items.length) {
+ return this.shown ? this.hide() : this
+ }
+
+ return this.render(items.slice(0, this.options.items)).show()
+ }
+
+ , matcher: function (item) {
+ return ~item.toLowerCase().indexOf(this.query.toLowerCase())
+ }
+
+ , sorter: function (items) {
+ var beginswith = []
+ , caseSensitive = []
+ , caseInsensitive = []
+ , item
+
+ while (item = items.shift()) {
+ if (!item.toLowerCase().indexOf(this.query.toLowerCase())) beginswith.push(item)
+ else if (~item.indexOf(this.query)) caseSensitive.push(item)
+ else caseInsensitive.push(item)
+ }
+
+ return beginswith.concat(caseSensitive, caseInsensitive)
+ }
+
+ , highlighter: function (item) {
+ var query = this.query.replace(/[\-\[\]{}()*+?.,\\\^$|#\s]/g, '\\$&')
+ return item.replace(new RegExp('(' + query + ')', 'ig'), function ($1, match) {
+ return '<strong>' + match + '</strong>'
+ })
+ }
+
+ , render: function (items) {
+ var that = this
+
+ items = $(items).map(function (i, item) {
+ i = $(that.options.item).attr('data-value', item)
+ i.find('a').html(that.highlighter(item))
+ return i[0]
+ })
+
+ items.first().addClass('active')
+ this.$menu.html(items)
+ return this
+ }
+
+ , next: function (event) {
+ var active = this.$menu.find('.active').removeClass('active')
+ , next = active.next()
+
+ if (!next.length) {
+ next = $(this.$menu.find('li')[0])
+ }
+
+ next.addClass('active')
+ }
+
+ , prev: function (event) {
+ var active = this.$menu.find('.active').removeClass('active')
+ , prev = active.prev()
+
+ if (!prev.length) {
+ prev = this.$menu.find('li').last()
+ }
+
+ prev.addClass('active')
+ }
+
+ , listen: function () {
+ this.$element
+ .on('focus', $.proxy(this.focus, this))
+ .on('blur', $.proxy(this.blur, this))
+ .on('keypress', $.proxy(this.keypress, this))
+ .on('keyup', $.proxy(this.keyup, this))
+
+ if (this.eventSupported('keydown')) {
+ this.$element.on('keydown', $.proxy(this.keydown, this))
+ }
+
+ this.$menu
+ .on('click', $.proxy(this.click, this))
+ .on('mouseenter', 'li', $.proxy(this.mouseenter, this))
+ .on('mouseleave', 'li', $.proxy(this.mouseleave, this))
+ }
+
+ , eventSupported: function(eventName) {
+ var isSupported = eventName in this.$element
+ if (!isSupported) {
+ this.$element.setAttribute(eventName, 'return;')
+ isSupported = typeof this.$element[eventName] === 'function'
+ }
+ return isSupported
+ }
+
+ , move: function (e) {
+ if (!this.shown) return
+
+ switch(e.keyCode) {
+ case 9: // tab
+ case 13: // enter
+ case 27: // escape
+ e.preventDefault()
+ break
+
+ case 38: // up arrow
+ e.preventDefault()
+ this.prev()
+ break
+
+ case 40: // down arrow
+ e.preventDefault()
+ this.next()
+ break
+ }
+
+ e.stopPropagation()
+ }
+
+ , keydown: function (e) {
+ this.suppressKeyPressRepeat = ~$.inArray(e.keyCode, [40,38,9,13,27])
+ this.move(e)
+ }
+
+ , keypress: function (e) {
+ if (this.suppressKeyPressRepeat) return
+ this.move(e)
+ }
+
+ , keyup: function (e) {
+ switch(e.keyCode) {
+ case 40: // down arrow
+ case 38: // up arrow
+ case 16: // shift
+ case 17: // ctrl
+ case 18: // alt
+ break
+
+ case 9: // tab
+ case 13: // enter
+ if (!this.shown) return
+ this.select()
+ break
+
+ case 27: // escape
+ if (!this.shown) return
+ this.hide()
+ break
+
+ default:
+ this.lookup()
+ }
+
+ e.stopPropagation()
+ e.preventDefault()
+ }
+
+ , focus: function (e) {
+ this.focused = true
+ }
+
+ , blur: function (e) {
+ this.focused = false
+ if (!this.mousedover && this.shown) this.hide()
+ }
+
+ , click: function (e) {
+ e.stopPropagation()
+ e.preventDefault()
+ this.select()
+ this.$element.focus()
+ }
+
+ , mouseenter: function (e) {
+ this.mousedover = true
+ this.$menu.find('.active').removeClass('active')
+ $(e.currentTarget).addClass('active')
+ }
+
+ , mouseleave: function (e) {
+ this.mousedover = false
+ if (!this.focused && this.shown) this.hide()
+ }
+
+ }
+
+
+ /* TYPEAHEAD PLUGIN DEFINITION
+ * =========================== */
+
+ var old = $.fn.typeahead
+
+ $.fn.typeahead = function (option) {
+ return this.each(function () {
+ var $this = $(this)
+ , data = $this.data('typeahead')
+ , options = typeof option == 'object' && option
+ if (!data) $this.data('typeahead', (data = new Typeahead(this, options)))
+ if (typeof option == 'string') data[option]()
+ })
+ }
+
+ $.fn.typeahead.defaults = {
+ source: []
+ , items: 8
+ , menu: '<ul class="typeahead dropdown-menu"></ul>'
+ , item: '<li><a href="#"></a></li>'
+ , minLength: 1
+ }
+
+ $.fn.typeahead.Constructor = Typeahead
+
+
+ /* TYPEAHEAD NO CONFLICT
+ * =================== */
+
+ $.fn.typeahead.noConflict = function () {
+ $.fn.typeahead = old
+ return this
+ }
+
+
+ /* TYPEAHEAD DATA-API
+ * ================== */
+
+ $(document).on('focus.typeahead.data-api', '[data-provide="typeahead"]', function (e) {
+ var $this = $(this)
+ if ($this.data('typeahead')) return
+ $this.typeahead($this.data())
+ })
+
+}(window.jQuery);
+/* ==========================================================
+ * bootstrap-affix.js v2.3.2
+ * http://getbootstrap.com/2.3.2/javascript.html#affix
+ * ==========================================================
+ * Copyright 2013 Twitter, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ========================================================== */
+
+
+!function ($) {
+
+ "use strict"; // jshint ;_;
+
+
+ /* AFFIX CLASS DEFINITION
+ * ====================== */
+
+ var Affix = function (element, options) {
+ this.options = $.extend({}, $.fn.affix.defaults, options)
+ this.$window = $(window)
+ .on('scroll.affix.data-api', $.proxy(this.checkPosition, this))
+ .on('click.affix.data-api', $.proxy(function () { setTimeout($.proxy(this.checkPosition, this), 1) }, this))
+ this.$element = $(element)
+ this.checkPosition()
+ }
+
+ Affix.prototype.checkPosition = function () {
+ if (!this.$element.is(':visible')) return
+
+ var scrollHeight = $(document).height()
+ , scrollTop = this.$window.scrollTop()
+ , position = this.$element.offset()
+ , offset = this.options.offset
+ , offsetBottom = offset.bottom
+ , offsetTop = offset.top
+ , reset = 'affix affix-top affix-bottom'
+ , affix
+
+ if (typeof offset != 'object') offsetBottom = offsetTop = offset
+ if (typeof offsetTop == 'function') offsetTop = offset.top()
+ if (typeof offsetBottom == 'function') offsetBottom = offset.bottom()
+
+ affix = this.unpin != null && (scrollTop + this.unpin <= position.top) ?
+ false : offsetBottom != null && (position.top + this.$element.height() >= scrollHeight - offsetBottom) ?
+ 'bottom' : offsetTop != null && scrollTop <= offsetTop ?
+ 'top' : false
+
+ if (this.affixed === affix) return
+
+ this.affixed = affix
+ this.unpin = affix == 'bottom' ? position.top - scrollTop : null
+
+ this.$element.removeClass(reset).addClass('affix' + (affix ? '-' + affix : ''))
+ }
+
+
+ /* AFFIX PLUGIN DEFINITION
+ * ======================= */
+
+ var old = $.fn.affix
+
+ $.fn.affix = function (option) {
+ return this.each(function () {
+ var $this = $(this)
+ , data = $this.data('affix')
+ , options = typeof option == 'object' && option
+ if (!data) $this.data('affix', (data = new Affix(this, options)))
+ if (typeof option == 'string') data[option]()
+ })
+ }
+
+ $.fn.affix.Constructor = Affix
+
+ $.fn.affix.defaults = {
+ offset: 0
+ }
+
+
+ /* AFFIX NO CONFLICT
+ * ================= */
+
+ $.fn.affix.noConflict = function () {
+ $.fn.affix = old
+ return this
+ }
+
+
+ /* AFFIX DATA-API
+ * ============== */
+
+ $(window).on('load', function () {
+ $('[data-spy="affix"]').each(function () {
+ var $spy = $(this)
+ , data = $spy.data()
+
+ data.offset = data.offset || {}
+
+ data.offsetBottom && (data.offset.bottom = data.offsetBottom)
+ data.offsetTop && (data.offset.top = data.offsetTop)
+
+ $spy.affix(data)
+ })
+ })
+
+
+}(window.jQuery);
[07/18] incubator-aurora-website git commit: Initial move of website
over to git
Posted by jf...@apache.org.
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/source/assets/js/bootstrap.js
----------------------------------------------------------------------
diff --git a/source/assets/js/bootstrap.js b/source/assets/js/bootstrap.js
new file mode 100644
index 0000000..44109f6
--- /dev/null
+++ b/source/assets/js/bootstrap.js
@@ -0,0 +1,2280 @@
+/* ===================================================
+ * bootstrap-transition.js v2.3.2
+ * http://getbootstrap.com/2.3.2/javascript.html#transitions
+ * ===================================================
+ * Copyright 2013 Twitter, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ========================================================== */
+
+
+!function ($) {
+
+ "use strict"; // jshint ;_;
+
+
+ /* CSS TRANSITION SUPPORT (http://www.modernizr.com/)
+ * ======================================================= */
+
+ $(function () {
+
+ $.support.transition = (function () {
+
+ var transitionEnd = (function () {
+
+ var el = document.createElement('bootstrap')
+ , transEndEventNames = {
+ 'WebkitTransition' : 'webkitTransitionEnd'
+ , 'MozTransition' : 'transitionend'
+ , 'OTransition' : 'oTransitionEnd otransitionend'
+ , 'transition' : 'transitionend'
+ }
+ , name
+
+ for (name in transEndEventNames){
+ if (el.style[name] !== undefined) {
+ return transEndEventNames[name]
+ }
+ }
+
+ }())
+
+ return transitionEnd && {
+ end: transitionEnd
+ }
+
+ })()
+
+ })
+
+}(window.jQuery);/* ==========================================================
+ * bootstrap-alert.js v2.3.2
+ * http://getbootstrap.com/2.3.2/javascript.html#alerts
+ * ==========================================================
+ * Copyright 2013 Twitter, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ========================================================== */
+
+
+!function ($) {
+
+ "use strict"; // jshint ;_;
+
+
+ /* ALERT CLASS DEFINITION
+ * ====================== */
+
+ var dismiss = '[data-dismiss="alert"]'
+ , Alert = function (el) {
+ $(el).on('click', dismiss, this.close)
+ }
+
+ Alert.prototype.close = function (e) {
+ var $this = $(this)
+ , selector = $this.attr('data-target')
+ , $parent
+
+ if (!selector) {
+ selector = $this.attr('href')
+ selector = selector && selector.replace(/.*(?=#[^\s]*$)/, '') //strip for ie7
+ }
+
+ $parent = $(selector)
+
+ e && e.preventDefault()
+
+ $parent.length || ($parent = $this.hasClass('alert') ? $this : $this.parent())
+
+ $parent.trigger(e = $.Event('close'))
+
+ if (e.isDefaultPrevented()) return
+
+ $parent.removeClass('in')
+
+ function removeElement() {
+ $parent
+ .trigger('closed')
+ .remove()
+ }
+
+ $.support.transition && $parent.hasClass('fade') ?
+ $parent.on($.support.transition.end, removeElement) :
+ removeElement()
+ }
+
+
+ /* ALERT PLUGIN DEFINITION
+ * ======================= */
+
+ var old = $.fn.alert
+
+ $.fn.alert = function (option) {
+ return this.each(function () {
+ var $this = $(this)
+ , data = $this.data('alert')
+ if (!data) $this.data('alert', (data = new Alert(this)))
+ if (typeof option == 'string') data[option].call($this)
+ })
+ }
+
+ $.fn.alert.Constructor = Alert
+
+
+ /* ALERT NO CONFLICT
+ * ================= */
+
+ $.fn.alert.noConflict = function () {
+ $.fn.alert = old
+ return this
+ }
+
+
+ /* ALERT DATA-API
+ * ============== */
+
+ $(document).on('click.alert.data-api', dismiss, Alert.prototype.close)
+
+}(window.jQuery);/* ============================================================
+ * bootstrap-button.js v2.3.2
+ * http://getbootstrap.com/2.3.2/javascript.html#buttons
+ * ============================================================
+ * Copyright 2013 Twitter, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============================================================ */
+
+
+!function ($) {
+
+ "use strict"; // jshint ;_;
+
+
+ /* BUTTON PUBLIC CLASS DEFINITION
+ * ============================== */
+
+ var Button = function (element, options) {
+ this.$element = $(element)
+ this.options = $.extend({}, $.fn.button.defaults, options)
+ }
+
+ Button.prototype.setState = function (state) {
+ var d = 'disabled'
+ , $el = this.$element
+ , data = $el.data()
+ , val = $el.is('input') ? 'val' : 'html'
+
+ state = state + 'Text'
+ data.resetText || $el.data('resetText', $el[val]())
+
+ $el[val](data[state] || this.options[state])
+
+ // push to event loop to allow forms to submit
+ setTimeout(function () {
+ state == 'loadingText' ?
+ $el.addClass(d).attr(d, d) :
+ $el.removeClass(d).removeAttr(d)
+ }, 0)
+ }
+
+ Button.prototype.toggle = function () {
+ var $parent = this.$element.closest('[data-toggle="buttons-radio"]')
+
+ $parent && $parent
+ .find('.active')
+ .removeClass('active')
+
+ this.$element.toggleClass('active')
+ }
+
+
+ /* BUTTON PLUGIN DEFINITION
+ * ======================== */
+
+ var old = $.fn.button
+
+ $.fn.button = function (option) {
+ return this.each(function () {
+ var $this = $(this)
+ , data = $this.data('button')
+ , options = typeof option == 'object' && option
+ if (!data) $this.data('button', (data = new Button(this, options)))
+ if (option == 'toggle') data.toggle()
+ else if (option) data.setState(option)
+ })
+ }
+
+ $.fn.button.defaults = {
+ loadingText: 'loading...'
+ }
+
+ $.fn.button.Constructor = Button
+
+
+ /* BUTTON NO CONFLICT
+ * ================== */
+
+ $.fn.button.noConflict = function () {
+ $.fn.button = old
+ return this
+ }
+
+
+ /* BUTTON DATA-API
+ * =============== */
+
+ $(document).on('click.button.data-api', '[data-toggle^=button]', function (e) {
+ var $btn = $(e.target)
+ if (!$btn.hasClass('btn')) $btn = $btn.closest('.btn')
+ $btn.button('toggle')
+ })
+
+}(window.jQuery);/* ==========================================================
+ * bootstrap-carousel.js v2.3.2
+ * http://getbootstrap.com/2.3.2/javascript.html#carousel
+ * ==========================================================
+ * Copyright 2013 Twitter, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ========================================================== */
+
+
+!function ($) {
+
+ "use strict"; // jshint ;_;
+
+
+ /* CAROUSEL CLASS DEFINITION
+ * ========================= */
+
+ var Carousel = function (element, options) {
+ this.$element = $(element)
+ this.$indicators = this.$element.find('.carousel-indicators')
+ this.options = options
+ this.options.pause == 'hover' && this.$element
+ .on('mouseenter', $.proxy(this.pause, this))
+ .on('mouseleave', $.proxy(this.cycle, this))
+ }
+
+ Carousel.prototype = {
+
+ cycle: function (e) {
+ if (!e) this.paused = false
+ if (this.interval) clearInterval(this.interval);
+ this.options.interval
+ && !this.paused
+ && (this.interval = setInterval($.proxy(this.next, this), this.options.interval))
+ return this
+ }
+
+ , getActiveIndex: function () {
+ this.$active = this.$element.find('.item.active')
+ this.$items = this.$active.parent().children()
+ return this.$items.index(this.$active)
+ }
+
+ , to: function (pos) {
+ var activeIndex = this.getActiveIndex()
+ , that = this
+
+ if (pos > (this.$items.length - 1) || pos < 0) return
+
+ if (this.sliding) {
+ return this.$element.one('slid', function () {
+ that.to(pos)
+ })
+ }
+
+ if (activeIndex == pos) {
+ return this.pause().cycle()
+ }
+
+ return this.slide(pos > activeIndex ? 'next' : 'prev', $(this.$items[pos]))
+ }
+
+ , pause: function (e) {
+ if (!e) this.paused = true
+ if (this.$element.find('.next, .prev').length && $.support.transition.end) {
+ this.$element.trigger($.support.transition.end)
+ this.cycle(true)
+ }
+ clearInterval(this.interval)
+ this.interval = null
+ return this
+ }
+
+ , next: function () {
+ if (this.sliding) return
+ return this.slide('next')
+ }
+
+ , prev: function () {
+ if (this.sliding) return
+ return this.slide('prev')
+ }
+
+ , slide: function (type, next) {
+ var $active = this.$element.find('.item.active')
+ , $next = next || $active[type]()
+ , isCycling = this.interval
+ , direction = type == 'next' ? 'left' : 'right'
+ , fallback = type == 'next' ? 'first' : 'last'
+ , that = this
+ , e
+
+ this.sliding = true
+
+ isCycling && this.pause()
+
+ $next = $next.length ? $next : this.$element.find('.item')[fallback]()
+
+ e = $.Event('slide', {
+ relatedTarget: $next[0]
+ , direction: direction
+ })
+
+ if ($next.hasClass('active')) return
+
+ if (this.$indicators.length) {
+ this.$indicators.find('.active').removeClass('active')
+ this.$element.one('slid', function () {
+ var $nextIndicator = $(that.$indicators.children()[that.getActiveIndex()])
+ $nextIndicator && $nextIndicator.addClass('active')
+ })
+ }
+
+ if ($.support.transition && this.$element.hasClass('slide')) {
+ this.$element.trigger(e)
+ if (e.isDefaultPrevented()) return
+ $next.addClass(type)
+ $next[0].offsetWidth // force reflow
+ $active.addClass(direction)
+ $next.addClass(direction)
+ this.$element.one($.support.transition.end, function () {
+ $next.removeClass([type, direction].join(' ')).addClass('active')
+ $active.removeClass(['active', direction].join(' '))
+ that.sliding = false
+ setTimeout(function () { that.$element.trigger('slid') }, 0)
+ })
+ } else {
+ this.$element.trigger(e)
+ if (e.isDefaultPrevented()) return
+ $active.removeClass('active')
+ $next.addClass('active')
+ this.sliding = false
+ this.$element.trigger('slid')
+ }
+
+ isCycling && this.cycle()
+
+ return this
+ }
+
+ }
+
+
+ /* CAROUSEL PLUGIN DEFINITION
+ * ========================== */
+
+ var old = $.fn.carousel
+
+ $.fn.carousel = function (option) {
+ return this.each(function () {
+ var $this = $(this)
+ , data = $this.data('carousel')
+ , options = $.extend({}, $.fn.carousel.defaults, typeof option == 'object' && option)
+ , action = typeof option == 'string' ? option : options.slide
+ if (!data) $this.data('carousel', (data = new Carousel(this, options)))
+ if (typeof option == 'number') data.to(option)
+ else if (action) data[action]()
+ else if (options.interval) data.pause().cycle()
+ })
+ }
+
+ $.fn.carousel.defaults = {
+ interval: 5000
+ , pause: 'hover'
+ }
+
+ $.fn.carousel.Constructor = Carousel
+
+
+ /* CAROUSEL NO CONFLICT
+ * ==================== */
+
+ $.fn.carousel.noConflict = function () {
+ $.fn.carousel = old
+ return this
+ }
+
+ /* CAROUSEL DATA-API
+ * ================= */
+
+ $(document).on('click.carousel.data-api', '[data-slide], [data-slide-to]', function (e) {
+ var $this = $(this), href
+ , $target = $($this.attr('data-target') || (href = $this.attr('href')) && href.replace(/.*(?=#[^\s]+$)/, '')) //strip for ie7
+ , options = $.extend({}, $target.data(), $this.data())
+ , slideIndex
+
+ $target.carousel(options)
+
+ if (slideIndex = $this.attr('data-slide-to')) {
+ $target.data('carousel').pause().to(slideIndex).cycle()
+ }
+
+ e.preventDefault()
+ })
+
+}(window.jQuery);/* =============================================================
+ * bootstrap-collapse.js v2.3.2
+ * http://getbootstrap.com/2.3.2/javascript.html#collapse
+ * =============================================================
+ * Copyright 2013 Twitter, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============================================================ */
+
+
+!function ($) {
+
+ "use strict"; // jshint ;_;
+
+
+ /* COLLAPSE PUBLIC CLASS DEFINITION
+ * ================================ */
+
+ var Collapse = function (element, options) {
+ this.$element = $(element)
+ this.options = $.extend({}, $.fn.collapse.defaults, options)
+
+ if (this.options.parent) {
+ this.$parent = $(this.options.parent)
+ }
+
+ this.options.toggle && this.toggle()
+ }
+
+ Collapse.prototype = {
+
+ constructor: Collapse
+
+ , dimension: function () {
+ var hasWidth = this.$element.hasClass('width')
+ return hasWidth ? 'width' : 'height'
+ }
+
+ , show: function () {
+ var dimension
+ , scroll
+ , actives
+ , hasData
+
+ if (this.transitioning || this.$element.hasClass('in')) return
+
+ dimension = this.dimension()
+ scroll = $.camelCase(['scroll', dimension].join('-'))
+ actives = this.$parent && this.$parent.find('> .accordion-group > .in')
+
+ if (actives && actives.length) {
+ hasData = actives.data('collapse')
+ if (hasData && hasData.transitioning) return
+ actives.collapse('hide')
+ hasData || actives.data('collapse', null)
+ }
+
+ this.$element[dimension](0)
+ this.transition('addClass', $.Event('show'), 'shown')
+ $.support.transition && this.$element[dimension](this.$element[0][scroll])
+ }
+
+ , hide: function () {
+ var dimension
+ if (this.transitioning || !this.$element.hasClass('in')) return
+ dimension = this.dimension()
+ this.reset(this.$element[dimension]())
+ this.transition('removeClass', $.Event('hide'), 'hidden')
+ this.$element[dimension](0)
+ }
+
+ , reset: function (size) {
+ var dimension = this.dimension()
+
+ this.$element
+ .removeClass('collapse')
+ [dimension](size || 'auto')
+ [0].offsetWidth
+
+ this.$element[size !== null ? 'addClass' : 'removeClass']('collapse')
+
+ return this
+ }
+
+ , transition: function (method, startEvent, completeEvent) {
+ var that = this
+ , complete = function () {
+ if (startEvent.type == 'show') that.reset()
+ that.transitioning = 0
+ that.$element.trigger(completeEvent)
+ }
+
+ this.$element.trigger(startEvent)
+
+ if (startEvent.isDefaultPrevented()) return
+
+ this.transitioning = 1
+
+ this.$element[method]('in')
+
+ $.support.transition && this.$element.hasClass('collapse') ?
+ this.$element.one($.support.transition.end, complete) :
+ complete()
+ }
+
+ , toggle: function () {
+ this[this.$element.hasClass('in') ? 'hide' : 'show']()
+ }
+
+ }
+
+
+ /* COLLAPSE PLUGIN DEFINITION
+ * ========================== */
+
+ var old = $.fn.collapse
+
+ $.fn.collapse = function (option) {
+ return this.each(function () {
+ var $this = $(this)
+ , data = $this.data('collapse')
+ , options = $.extend({}, $.fn.collapse.defaults, $this.data(), typeof option == 'object' && option)
+ if (!data) $this.data('collapse', (data = new Collapse(this, options)))
+ if (typeof option == 'string') data[option]()
+ })
+ }
+
+ $.fn.collapse.defaults = {
+ toggle: true
+ }
+
+ $.fn.collapse.Constructor = Collapse
+
+
+ /* COLLAPSE NO CONFLICT
+ * ==================== */
+
+ $.fn.collapse.noConflict = function () {
+ $.fn.collapse = old
+ return this
+ }
+
+
+ /* COLLAPSE DATA-API
+ * ================= */
+
+ $(document).on('click.collapse.data-api', '[data-toggle=collapse]', function (e) {
+ var $this = $(this), href
+ , target = $this.attr('data-target')
+ || e.preventDefault()
+ || (href = $this.attr('href')) && href.replace(/.*(?=#[^\s]+$)/, '') //strip for ie7
+ , option = $(target).data('collapse') ? 'toggle' : $this.data()
+ $this[$(target).hasClass('in') ? 'addClass' : 'removeClass']('collapsed')
+ $(target).collapse(option)
+ })
+
+}(window.jQuery);/* ============================================================
+ * bootstrap-dropdown.js v2.3.2
+ * http://getbootstrap.com/2.3.2/javascript.html#dropdowns
+ * ============================================================
+ * Copyright 2013 Twitter, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============================================================ */
+
+
+!function ($) {
+
+ "use strict"; // jshint ;_;
+
+
+ /* DROPDOWN CLASS DEFINITION
+ * ========================= */
+
+ var toggle = '[data-toggle=dropdown]'
+ , Dropdown = function (element) {
+ var $el = $(element).on('click.dropdown.data-api', this.toggle)
+ $('html').on('click.dropdown.data-api', function () {
+ $el.parent().removeClass('open')
+ })
+ }
+
+ Dropdown.prototype = {
+
+ constructor: Dropdown
+
+ , toggle: function (e) {
+ var $this = $(this)
+ , $parent
+ , isActive
+
+ if ($this.is('.disabled, :disabled')) return
+
+ $parent = getParent($this)
+
+ isActive = $parent.hasClass('open')
+
+ clearMenus()
+
+ if (!isActive) {
+ if ('ontouchstart' in document.documentElement) {
+ // if mobile we we use a backdrop because click events don't delegate
+ $('<div class="dropdown-backdrop"/>').insertBefore($(this)).on('click', clearMenus)
+ }
+ $parent.toggleClass('open')
+ }
+
+ $this.focus()
+
+ return false
+ }
+
+ , keydown: function (e) {
+ var $this
+ , $items
+ , $active
+ , $parent
+ , isActive
+ , index
+
+ if (!/(38|40|27)/.test(e.keyCode)) return
+
+ $this = $(this)
+
+ e.preventDefault()
+ e.stopPropagation()
+
+ if ($this.is('.disabled, :disabled')) return
+
+ $parent = getParent($this)
+
+ isActive = $parent.hasClass('open')
+
+ if (!isActive || (isActive && e.keyCode == 27)) {
+ if (e.which == 27) $parent.find(toggle).focus()
+ return $this.click()
+ }
+
+ $items = $('[role=menu] li:not(.divider):visible a', $parent)
+
+ if (!$items.length) return
+
+ index = $items.index($items.filter(':focus'))
+
+ if (e.keyCode == 38 && index > 0) index-- // up
+ if (e.keyCode == 40 && index < $items.length - 1) index++ // down
+ if (!~index) index = 0
+
+ $items
+ .eq(index)
+ .focus()
+ }
+
+ }
+
+ function clearMenus() {
+ $('.dropdown-backdrop').remove()
+ $(toggle).each(function () {
+ getParent($(this)).removeClass('open')
+ })
+ }
+
+ function getParent($this) {
+ var selector = $this.attr('data-target')
+ , $parent
+
+ if (!selector) {
+ selector = $this.attr('href')
+ selector = selector && /#/.test(selector) && selector.replace(/.*(?=#[^\s]*$)/, '') //strip for ie7
+ }
+
+ $parent = selector && $(selector)
+
+ if (!$parent || !$parent.length) $parent = $this.parent()
+
+ return $parent
+ }
+
+
+ /* DROPDOWN PLUGIN DEFINITION
+ * ========================== */
+
+ var old = $.fn.dropdown
+
+ $.fn.dropdown = function (option) {
+ return this.each(function () {
+ var $this = $(this)
+ , data = $this.data('dropdown')
+ if (!data) $this.data('dropdown', (data = new Dropdown(this)))
+ if (typeof option == 'string') data[option].call($this)
+ })
+ }
+
+ $.fn.dropdown.Constructor = Dropdown
+
+
+ /* DROPDOWN NO CONFLICT
+ * ==================== */
+
+ $.fn.dropdown.noConflict = function () {
+ $.fn.dropdown = old
+ return this
+ }
+
+
+ /* APPLY TO STANDARD DROPDOWN ELEMENTS
+ * =================================== */
+
+ $(document)
+ .on('click.dropdown.data-api', clearMenus)
+ .on('click.dropdown.data-api', '.dropdown form', function (e) { e.stopPropagation() })
+ .on('click.dropdown.data-api' , toggle, Dropdown.prototype.toggle)
+ .on('keydown.dropdown.data-api', toggle + ', [role=menu]' , Dropdown.prototype.keydown)
+
+}(window.jQuery);
+/* =========================================================
+ * bootstrap-modal.js v2.3.2
+ * http://getbootstrap.com/2.3.2/javascript.html#modals
+ * =========================================================
+ * Copyright 2013 Twitter, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ========================================================= */
+
+
+!function ($) {
+
+ "use strict"; // jshint ;_;
+
+
+ /* MODAL CLASS DEFINITION
+ * ====================== */
+
+ var Modal = function (element, options) {
+ this.options = options
+ this.$element = $(element)
+ .delegate('[data-dismiss="modal"]', 'click.dismiss.modal', $.proxy(this.hide, this))
+ this.options.remote && this.$element.find('.modal-body').load(this.options.remote)
+ }
+
+ Modal.prototype = {
+
+ constructor: Modal
+
+ , toggle: function () {
+ return this[!this.isShown ? 'show' : 'hide']()
+ }
+
+ , show: function () {
+ var that = this
+ , e = $.Event('show')
+
+ this.$element.trigger(e)
+
+ if (this.isShown || e.isDefaultPrevented()) return
+
+ this.isShown = true
+
+ this.escape()
+
+ this.backdrop(function () {
+ var transition = $.support.transition && that.$element.hasClass('fade')
+
+ if (!that.$element.parent().length) {
+ that.$element.appendTo(document.body) //don't move modals dom position
+ }
+
+ that.$element.show()
+
+ if (transition) {
+ that.$element[0].offsetWidth // force reflow
+ }
+
+ that.$element
+ .addClass('in')
+ .attr('aria-hidden', false)
+
+ that.enforceFocus()
+
+ transition ?
+ that.$element.one($.support.transition.end, function () { that.$element.focus().trigger('shown') }) :
+ that.$element.focus().trigger('shown')
+
+ })
+ }
+
+ , hide: function (e) {
+ e && e.preventDefault()
+
+ var that = this
+
+ e = $.Event('hide')
+
+ this.$element.trigger(e)
+
+ if (!this.isShown || e.isDefaultPrevented()) return
+
+ this.isShown = false
+
+ this.escape()
+
+ $(document).off('focusin.modal')
+
+ this.$element
+ .removeClass('in')
+ .attr('aria-hidden', true)
+
+ $.support.transition && this.$element.hasClass('fade') ?
+ this.hideWithTransition() :
+ this.hideModal()
+ }
+
+ , enforceFocus: function () {
+ var that = this
+ $(document).on('focusin.modal', function (e) {
+ if (that.$element[0] !== e.target && !that.$element.has(e.target).length) {
+ that.$element.focus()
+ }
+ })
+ }
+
+ , escape: function () {
+ var that = this
+ if (this.isShown && this.options.keyboard) {
+ this.$element.on('keyup.dismiss.modal', function ( e ) {
+ e.which == 27 && that.hide()
+ })
+ } else if (!this.isShown) {
+ this.$element.off('keyup.dismiss.modal')
+ }
+ }
+
+ , hideWithTransition: function () {
+ var that = this
+ , timeout = setTimeout(function () {
+ that.$element.off($.support.transition.end)
+ that.hideModal()
+ }, 500)
+
+ this.$element.one($.support.transition.end, function () {
+ clearTimeout(timeout)
+ that.hideModal()
+ })
+ }
+
+ , hideModal: function () {
+ var that = this
+ this.$element.hide()
+ this.backdrop(function () {
+ that.removeBackdrop()
+ that.$element.trigger('hidden')
+ })
+ }
+
+ , removeBackdrop: function () {
+ this.$backdrop && this.$backdrop.remove()
+ this.$backdrop = null
+ }
+
+ , backdrop: function (callback) {
+ var that = this
+ , animate = this.$element.hasClass('fade') ? 'fade' : ''
+
+ if (this.isShown && this.options.backdrop) {
+ var doAnimate = $.support.transition && animate
+
+ this.$backdrop = $('<div class="modal-backdrop ' + animate + '" />')
+ .appendTo(document.body)
+
+ this.$backdrop.click(
+ this.options.backdrop == 'static' ?
+ $.proxy(this.$element[0].focus, this.$element[0])
+ : $.proxy(this.hide, this)
+ )
+
+ if (doAnimate) this.$backdrop[0].offsetWidth // force reflow
+
+ this.$backdrop.addClass('in')
+
+ if (!callback) return
+
+ doAnimate ?
+ this.$backdrop.one($.support.transition.end, callback) :
+ callback()
+
+ } else if (!this.isShown && this.$backdrop) {
+ this.$backdrop.removeClass('in')
+
+ $.support.transition && this.$element.hasClass('fade')?
+ this.$backdrop.one($.support.transition.end, callback) :
+ callback()
+
+ } else if (callback) {
+ callback()
+ }
+ }
+ }
+
+
+ /* MODAL PLUGIN DEFINITION
+ * ======================= */
+
+ var old = $.fn.modal
+
+ $.fn.modal = function (option) {
+ return this.each(function () {
+ var $this = $(this)
+ , data = $this.data('modal')
+ , options = $.extend({}, $.fn.modal.defaults, $this.data(), typeof option == 'object' && option)
+ if (!data) $this.data('modal', (data = new Modal(this, options)))
+ if (typeof option == 'string') data[option]()
+ else if (options.show) data.show()
+ })
+ }
+
+ $.fn.modal.defaults = {
+ backdrop: true
+ , keyboard: true
+ , show: true
+ }
+
+ $.fn.modal.Constructor = Modal
+
+
+ /* MODAL NO CONFLICT
+ * ================= */
+
+ $.fn.modal.noConflict = function () {
+ $.fn.modal = old
+ return this
+ }
+
+
+ /* MODAL DATA-API
+ * ============== */
+
+ $(document).on('click.modal.data-api', '[data-toggle="modal"]', function (e) {
+ var $this = $(this)
+ , href = $this.attr('href')
+ , $target = $($this.attr('data-target') || (href && href.replace(/.*(?=#[^\s]+$)/, ''))) //strip for ie7
+ , option = $target.data('modal') ? 'toggle' : $.extend({ remote:!/#/.test(href) && href }, $target.data(), $this.data())
+
+ e.preventDefault()
+
+ $target
+ .modal(option)
+ .one('hide', function () {
+ $this.focus()
+ })
+ })
+
+}(window.jQuery);
+/* ===========================================================
+ * bootstrap-tooltip.js v2.3.2
+ * http://getbootstrap.com/2.3.2/javascript.html#tooltips
+ * Inspired by the original jQuery.tipsy by Jason Frame
+ * ===========================================================
+ * Copyright 2013 Twitter, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ========================================================== */
+
+
+!function ($) {
+
+ "use strict"; // jshint ;_;
+
+
+ /* TOOLTIP PUBLIC CLASS DEFINITION
+ * =============================== */
+
+ var Tooltip = function (element, options) {
+ this.init('tooltip', element, options)
+ }
+
+ Tooltip.prototype = {
+
+ constructor: Tooltip
+
+ , init: function (type, element, options) {
+ var eventIn
+ , eventOut
+ , triggers
+ , trigger
+ , i
+
+ this.type = type
+ this.$element = $(element)
+ this.options = this.getOptions(options)
+ this.enabled = true
+
+ triggers = this.options.trigger.split(' ')
+
+ for (i = triggers.length; i--;) {
+ trigger = triggers[i]
+ if (trigger == 'click') {
+ this.$element.on('click.' + this.type, this.options.selector, $.proxy(this.toggle, this))
+ } else if (trigger != 'manual') {
+ eventIn = trigger == 'hover' ? 'mouseenter' : 'focus'
+ eventOut = trigger == 'hover' ? 'mouseleave' : 'blur'
+ this.$element.on(eventIn + '.' + this.type, this.options.selector, $.proxy(this.enter, this))
+ this.$element.on(eventOut + '.' + this.type, this.options.selector, $.proxy(this.leave, this))
+ }
+ }
+
+ this.options.selector ?
+ (this._options = $.extend({}, this.options, { trigger: 'manual', selector: '' })) :
+ this.fixTitle()
+ }
+
+ , getOptions: function (options) {
+ options = $.extend({}, $.fn[this.type].defaults, this.$element.data(), options)
+
+ if (options.delay && typeof options.delay == 'number') {
+ options.delay = {
+ show: options.delay
+ , hide: options.delay
+ }
+ }
+
+ return options
+ }
+
+ , enter: function (e) {
+ var defaults = $.fn[this.type].defaults
+ , options = {}
+ , self
+
+ this._options && $.each(this._options, function (key, value) {
+ if (defaults[key] != value) options[key] = value
+ }, this)
+
+ self = $(e.currentTarget)[this.type](options).data(this.type)
+
+ if (!self.options.delay || !self.options.delay.show) return self.show()
+
+ clearTimeout(this.timeout)
+ self.hoverState = 'in'
+ this.timeout = setTimeout(function() {
+ if (self.hoverState == 'in') self.show()
+ }, self.options.delay.show)
+ }
+
+ , leave: function (e) {
+ var self = $(e.currentTarget)[this.type](this._options).data(this.type)
+
+ if (this.timeout) clearTimeout(this.timeout)
+ if (!self.options.delay || !self.options.delay.hide) return self.hide()
+
+ self.hoverState = 'out'
+ this.timeout = setTimeout(function() {
+ if (self.hoverState == 'out') self.hide()
+ }, self.options.delay.hide)
+ }
+
+ , show: function () {
+ var $tip
+ , pos
+ , actualWidth
+ , actualHeight
+ , placement
+ , tp
+ , e = $.Event('show')
+
+ if (this.hasContent() && this.enabled) {
+ this.$element.trigger(e)
+ if (e.isDefaultPrevented()) return
+ $tip = this.tip()
+ this.setContent()
+
+ if (this.options.animation) {
+ $tip.addClass('fade')
+ }
+
+ placement = typeof this.options.placement == 'function' ?
+ this.options.placement.call(this, $tip[0], this.$element[0]) :
+ this.options.placement
+
+ $tip
+ .detach()
+ .css({ top: 0, left: 0, display: 'block' })
+
+ this.options.container ? $tip.appendTo(this.options.container) : $tip.insertAfter(this.$element)
+
+ pos = this.getPosition()
+
+ actualWidth = $tip[0].offsetWidth
+ actualHeight = $tip[0].offsetHeight
+
+ switch (placement) {
+ case 'bottom':
+ tp = {top: pos.top + pos.height, left: pos.left + pos.width / 2 - actualWidth / 2}
+ break
+ case 'top':
+ tp = {top: pos.top - actualHeight, left: pos.left + pos.width / 2 - actualWidth / 2}
+ break
+ case 'left':
+ tp = {top: pos.top + pos.height / 2 - actualHeight / 2, left: pos.left - actualWidth}
+ break
+ case 'right':
+ tp = {top: pos.top + pos.height / 2 - actualHeight / 2, left: pos.left + pos.width}
+ break
+ }
+
+ this.applyPlacement(tp, placement)
+ this.$element.trigger('shown')
+ }
+ }
+
+ , applyPlacement: function(offset, placement){
+ var $tip = this.tip()
+ , width = $tip[0].offsetWidth
+ , height = $tip[0].offsetHeight
+ , actualWidth
+ , actualHeight
+ , delta
+ , replace
+
+ $tip
+ .offset(offset)
+ .addClass(placement)
+ .addClass('in')
+
+ actualWidth = $tip[0].offsetWidth
+ actualHeight = $tip[0].offsetHeight
+
+ if (placement == 'top' && actualHeight != height) {
+ offset.top = offset.top + height - actualHeight
+ replace = true
+ }
+
+ if (placement == 'bottom' || placement == 'top') {
+ delta = 0
+
+ if (offset.left < 0){
+ delta = offset.left * -2
+ offset.left = 0
+ $tip.offset(offset)
+ actualWidth = $tip[0].offsetWidth
+ actualHeight = $tip[0].offsetHeight
+ }
+
+ this.replaceArrow(delta - width + actualWidth, actualWidth, 'left')
+ } else {
+ this.replaceArrow(actualHeight - height, actualHeight, 'top')
+ }
+
+ if (replace) $tip.offset(offset)
+ }
+
+ , replaceArrow: function(delta, dimension, position){
+ this
+ .arrow()
+ .css(position, delta ? (50 * (1 - delta / dimension) + "%") : '')
+ }
+
+ , setContent: function () {
+ var $tip = this.tip()
+ , title = this.getTitle()
+
+ $tip.find('.tooltip-inner')[this.options.html ? 'html' : 'text'](title)
+ $tip.removeClass('fade in top bottom left right')
+ }
+
+ , hide: function () {
+ var that = this
+ , $tip = this.tip()
+ , e = $.Event('hide')
+
+ this.$element.trigger(e)
+ if (e.isDefaultPrevented()) return
+
+ $tip.removeClass('in')
+
+ function removeWithAnimation() {
+ var timeout = setTimeout(function () {
+ $tip.off($.support.transition.end).detach()
+ }, 500)
+
+ $tip.one($.support.transition.end, function () {
+ clearTimeout(timeout)
+ $tip.detach()
+ })
+ }
+
+ $.support.transition && this.$tip.hasClass('fade') ?
+ removeWithAnimation() :
+ $tip.detach()
+
+ this.$element.trigger('hidden')
+
+ return this
+ }
+
+ , fixTitle: function () {
+ var $e = this.$element
+ if ($e.attr('title') || typeof($e.attr('data-original-title')) != 'string') {
+ $e.attr('data-original-title', $e.attr('title') || '').attr('title', '')
+ }
+ }
+
+ , hasContent: function () {
+ return this.getTitle()
+ }
+
+ , getPosition: function () {
+ var el = this.$element[0]
+ return $.extend({}, (typeof el.getBoundingClientRect == 'function') ? el.getBoundingClientRect() : {
+ width: el.offsetWidth
+ , height: el.offsetHeight
+ }, this.$element.offset())
+ }
+
+ , getTitle: function () {
+ var title
+ , $e = this.$element
+ , o = this.options
+
+ title = $e.attr('data-original-title')
+ || (typeof o.title == 'function' ? o.title.call($e[0]) : o.title)
+
+ return title
+ }
+
+ , tip: function () {
+ return this.$tip = this.$tip || $(this.options.template)
+ }
+
+ , arrow: function(){
+ return this.$arrow = this.$arrow || this.tip().find(".tooltip-arrow")
+ }
+
+ , validate: function () {
+ if (!this.$element[0].parentNode) {
+ this.hide()
+ this.$element = null
+ this.options = null
+ }
+ }
+
+ , enable: function () {
+ this.enabled = true
+ }
+
+ , disable: function () {
+ this.enabled = false
+ }
+
+ , toggleEnabled: function () {
+ this.enabled = !this.enabled
+ }
+
+ , toggle: function (e) {
+ var self = e ? $(e.currentTarget)[this.type](this._options).data(this.type) : this
+ self.tip().hasClass('in') ? self.hide() : self.show()
+ }
+
+ , destroy: function () {
+ this.hide().$element.off('.' + this.type).removeData(this.type)
+ }
+
+ }
+
+
+ /* TOOLTIP PLUGIN DEFINITION
+ * ========================= */
+
+ var old = $.fn.tooltip
+
+ $.fn.tooltip = function ( option ) {
+ return this.each(function () {
+ var $this = $(this)
+ , data = $this.data('tooltip')
+ , options = typeof option == 'object' && option
+ if (!data) $this.data('tooltip', (data = new Tooltip(this, options)))
+ if (typeof option == 'string') data[option]()
+ })
+ }
+
+ $.fn.tooltip.Constructor = Tooltip
+
+ $.fn.tooltip.defaults = {
+ animation: true
+ , placement: 'top'
+ , selector: false
+ , template: '<div class="tooltip"><div class="tooltip-arrow"></div><div class="tooltip-inner"></div></div>'
+ , trigger: 'hover focus'
+ , title: ''
+ , delay: 0
+ , html: false
+ , container: false
+ }
+
+
+ /* TOOLTIP NO CONFLICT
+ * =================== */
+
+ $.fn.tooltip.noConflict = function () {
+ $.fn.tooltip = old
+ return this
+ }
+
+}(window.jQuery);
+/* ===========================================================
+ * bootstrap-popover.js v2.3.2
+ * http://getbootstrap.com/2.3.2/javascript.html#popovers
+ * ===========================================================
+ * Copyright 2013 Twitter, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * =========================================================== */
+
+
+!function ($) {
+
+ "use strict"; // jshint ;_;
+
+
+ /* POPOVER PUBLIC CLASS DEFINITION
+ * =============================== */
+
+ var Popover = function (element, options) {
+ this.init('popover', element, options)
+ }
+
+
+ /* NOTE: POPOVER EXTENDS BOOTSTRAP-TOOLTIP.js
+ ========================================== */
+
+ Popover.prototype = $.extend({}, $.fn.tooltip.Constructor.prototype, {
+
+ constructor: Popover
+
+ , setContent: function () {
+ var $tip = this.tip()
+ , title = this.getTitle()
+ , content = this.getContent()
+
+ $tip.find('.popover-title')[this.options.html ? 'html' : 'text'](title)
+ $tip.find('.popover-content')[this.options.html ? 'html' : 'text'](content)
+
+ $tip.removeClass('fade top bottom left right in')
+ }
+
+ , hasContent: function () {
+ return this.getTitle() || this.getContent()
+ }
+
+ , getContent: function () {
+ var content
+ , $e = this.$element
+ , o = this.options
+
+ content = (typeof o.content == 'function' ? o.content.call($e[0]) : o.content)
+ || $e.attr('data-content')
+
+ return content
+ }
+
+ , tip: function () {
+ if (!this.$tip) {
+ this.$tip = $(this.options.template)
+ }
+ return this.$tip
+ }
+
+ , destroy: function () {
+ this.hide().$element.off('.' + this.type).removeData(this.type)
+ }
+
+ })
+
+
+ /* POPOVER PLUGIN DEFINITION
+ * ======================= */
+
+ var old = $.fn.popover
+
+ $.fn.popover = function (option) {
+ return this.each(function () {
+ var $this = $(this)
+ , data = $this.data('popover')
+ , options = typeof option == 'object' && option
+ if (!data) $this.data('popover', (data = new Popover(this, options)))
+ if (typeof option == 'string') data[option]()
+ })
+ }
+
+ $.fn.popover.Constructor = Popover
+
+ $.fn.popover.defaults = $.extend({} , $.fn.tooltip.defaults, {
+ placement: 'right'
+ , trigger: 'click'
+ , content: ''
+ , template: '<div class="popover"><div class="arrow"></div><h3 class="popover-title"></h3><div class="popover-content"></div></div>'
+ })
+
+
+ /* POPOVER NO CONFLICT
+ * =================== */
+
+ $.fn.popover.noConflict = function () {
+ $.fn.popover = old
+ return this
+ }
+
+}(window.jQuery);
+/* =============================================================
+ * bootstrap-scrollspy.js v2.3.2
+ * http://getbootstrap.com/2.3.2/javascript.html#scrollspy
+ * =============================================================
+ * Copyright 2013 Twitter, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============================================================== */
+
+
+!function ($) {
+
+ "use strict"; // jshint ;_;
+
+
+ /* SCROLLSPY CLASS DEFINITION
+ * ========================== */
+
+ function ScrollSpy(element, options) {
+ var process = $.proxy(this.process, this)
+ , $element = $(element).is('body') ? $(window) : $(element)
+ , href
+ this.options = $.extend({}, $.fn.scrollspy.defaults, options)
+ this.$scrollElement = $element.on('scroll.scroll-spy.data-api', process)
+ this.selector = (this.options.target
+ || ((href = $(element).attr('href')) && href.replace(/.*(?=#[^\s]+$)/, '')) //strip for ie7
+ || '') + ' .nav li > a'
+ this.$body = $('body')
+ this.refresh()
+ this.process()
+ }
+
+ ScrollSpy.prototype = {
+
+ constructor: ScrollSpy
+
+ , refresh: function () {
+ var self = this
+ , $targets
+
+ this.offsets = $([])
+ this.targets = $([])
+
+ $targets = this.$body
+ .find(this.selector)
+ .map(function () {
+ var $el = $(this)
+ , href = $el.data('target') || $el.attr('href')
+ , $href = /^#\w/.test(href) && $(href)
+ return ( $href
+ && $href.length
+ && [[ $href.position().top + (!$.isWindow(self.$scrollElement.get(0)) && self.$scrollElement.scrollTop()), href ]] ) || null
+ })
+ .sort(function (a, b) { return a[0] - b[0] })
+ .each(function () {
+ self.offsets.push(this[0])
+ self.targets.push(this[1])
+ })
+ }
+
+ , process: function () {
+ var scrollTop = this.$scrollElement.scrollTop() + this.options.offset
+ , scrollHeight = this.$scrollElement[0].scrollHeight || this.$body[0].scrollHeight
+ , maxScroll = scrollHeight - this.$scrollElement.height()
+ , offsets = this.offsets
+ , targets = this.targets
+ , activeTarget = this.activeTarget
+ , i
+
+ if (scrollTop >= maxScroll) {
+ return activeTarget != (i = targets.last()[0])
+ && this.activate ( i )
+ }
+
+ for (i = offsets.length; i--;) {
+ activeTarget != targets[i]
+ && scrollTop >= offsets[i]
+ && (!offsets[i + 1] || scrollTop <= offsets[i + 1])
+ && this.activate( targets[i] )
+ }
+ }
+
+ , activate: function (target) {
+ var active
+ , selector
+
+ this.activeTarget = target
+
+ $(this.selector)
+ .parent('.active')
+ .removeClass('active')
+
+ selector = this.selector
+ + '[data-target="' + target + '"],'
+ + this.selector + '[href="' + target + '"]'
+
+ active = $(selector)
+ .parent('li')
+ .addClass('active')
+
+ if (active.parent('.dropdown-menu').length) {
+ active = active.closest('li.dropdown').addClass('active')
+ }
+
+ active.trigger('activate')
+ }
+
+ }
+
+
+ /* SCROLLSPY PLUGIN DEFINITION
+ * =========================== */
+
+ var old = $.fn.scrollspy
+
+ $.fn.scrollspy = function (option) {
+ return this.each(function () {
+ var $this = $(this)
+ , data = $this.data('scrollspy')
+ , options = typeof option == 'object' && option
+ if (!data) $this.data('scrollspy', (data = new ScrollSpy(this, options)))
+ if (typeof option == 'string') data[option]()
+ })
+ }
+
+ $.fn.scrollspy.Constructor = ScrollSpy
+
+ $.fn.scrollspy.defaults = {
+ offset: 10
+ }
+
+
+ /* SCROLLSPY NO CONFLICT
+ * ===================== */
+
+ $.fn.scrollspy.noConflict = function () {
+ $.fn.scrollspy = old
+ return this
+ }
+
+
+ /* SCROLLSPY DATA-API
+ * ================== */
+
+ $(window).on('load', function () {
+ $('[data-spy="scroll"]').each(function () {
+ var $spy = $(this)
+ $spy.scrollspy($spy.data())
+ })
+ })
+
+}(window.jQuery);/* ========================================================
+ * bootstrap-tab.js v2.3.2
+ * http://getbootstrap.com/2.3.2/javascript.html#tabs
+ * ========================================================
+ * Copyright 2013 Twitter, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ======================================================== */
+
+
+!function ($) {
+
+ "use strict"; // jshint ;_;
+
+
+ /* TAB CLASS DEFINITION
+ * ==================== */
+
+ var Tab = function (element) {
+ this.element = $(element)
+ }
+
+ Tab.prototype = {
+
+ constructor: Tab
+
+ , show: function () {
+ var $this = this.element
+ , $ul = $this.closest('ul:not(.dropdown-menu)')
+ , selector = $this.attr('data-target')
+ , previous
+ , $target
+ , e
+
+ if (!selector) {
+ selector = $this.attr('href')
+ selector = selector && selector.replace(/.*(?=#[^\s]*$)/, '') //strip for ie7
+ }
+
+ if ( $this.parent('li').hasClass('active') ) return
+
+ previous = $ul.find('.active:last a')[0]
+
+ e = $.Event('show', {
+ relatedTarget: previous
+ })
+
+ $this.trigger(e)
+
+ if (e.isDefaultPrevented()) return
+
+ $target = $(selector)
+
+ this.activate($this.parent('li'), $ul)
+ this.activate($target, $target.parent(), function () {
+ $this.trigger({
+ type: 'shown'
+ , relatedTarget: previous
+ })
+ })
+ }
+
+ , activate: function ( element, container, callback) {
+ var $active = container.find('> .active')
+ , transition = callback
+ && $.support.transition
+ && $active.hasClass('fade')
+
+ function next() {
+ $active
+ .removeClass('active')
+ .find('> .dropdown-menu > .active')
+ .removeClass('active')
+
+ element.addClass('active')
+
+ if (transition) {
+ element[0].offsetWidth // reflow for transition
+ element.addClass('in')
+ } else {
+ element.removeClass('fade')
+ }
+
+ if ( element.parent('.dropdown-menu') ) {
+ element.closest('li.dropdown').addClass('active')
+ }
+
+ callback && callback()
+ }
+
+ transition ?
+ $active.one($.support.transition.end, next) :
+ next()
+
+ $active.removeClass('in')
+ }
+ }
+
+
+ /* TAB PLUGIN DEFINITION
+ * ===================== */
+
+ var old = $.fn.tab
+
+ $.fn.tab = function ( option ) {
+ return this.each(function () {
+ var $this = $(this)
+ , data = $this.data('tab')
+ if (!data) $this.data('tab', (data = new Tab(this)))
+ if (typeof option == 'string') data[option]()
+ })
+ }
+
+ $.fn.tab.Constructor = Tab
+
+
+ /* TAB NO CONFLICT
+ * =============== */
+
+ $.fn.tab.noConflict = function () {
+ $.fn.tab = old
+ return this
+ }
+
+
+ /* TAB DATA-API
+ * ============ */
+
+ $(document).on('click.tab.data-api', '[data-toggle="tab"], [data-toggle="pill"]', function (e) {
+ e.preventDefault()
+ $(this).tab('show')
+ })
+
+}(window.jQuery);/* =============================================================
+ * bootstrap-typeahead.js v2.3.2
+ * http://getbootstrap.com/2.3.2/javascript.html#typeahead
+ * =============================================================
+ * Copyright 2013 Twitter, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============================================================ */
+
+
+!function($){
+
+ "use strict"; // jshint ;_;
+
+
+ /* TYPEAHEAD PUBLIC CLASS DEFINITION
+ * ================================= */
+
+ var Typeahead = function (element, options) {
+ this.$element = $(element)
+ this.options = $.extend({}, $.fn.typeahead.defaults, options)
+ this.matcher = this.options.matcher || this.matcher
+ this.sorter = this.options.sorter || this.sorter
+ this.highlighter = this.options.highlighter || this.highlighter
+ this.updater = this.options.updater || this.updater
+ this.source = this.options.source
+ this.$menu = $(this.options.menu)
+ this.shown = false
+ this.listen()
+ }
+
+ Typeahead.prototype = {
+
+ constructor: Typeahead
+
+ , select: function () {
+ var val = this.$menu.find('.active').attr('data-value')
+ this.$element
+ .val(this.updater(val))
+ .change()
+ return this.hide()
+ }
+
+ , updater: function (item) {
+ return item
+ }
+
+ , show: function () {
+ var pos = $.extend({}, this.$element.position(), {
+ height: this.$element[0].offsetHeight
+ })
+
+ this.$menu
+ .insertAfter(this.$element)
+ .css({
+ top: pos.top + pos.height
+ , left: pos.left
+ })
+ .show()
+
+ this.shown = true
+ return this
+ }
+
+ , hide: function () {
+ this.$menu.hide()
+ this.shown = false
+ return this
+ }
+
+ , lookup: function (event) {
+ var items
+
+ this.query = this.$element.val()
+
+ if (!this.query || this.query.length < this.options.minLength) {
+ return this.shown ? this.hide() : this
+ }
+
+ items = $.isFunction(this.source) ? this.source(this.query, $.proxy(this.process, this)) : this.source
+
+ return items ? this.process(items) : this
+ }
+
+ , process: function (items) {
+ var that = this
+
+ items = $.grep(items, function (item) {
+ return that.matcher(item)
+ })
+
+ items = this.sorter(items)
+
+ if (!items.length) {
+ return this.shown ? this.hide() : this
+ }
+
+ return this.render(items.slice(0, this.options.items)).show()
+ }
+
+ , matcher: function (item) {
+ return ~item.toLowerCase().indexOf(this.query.toLowerCase())
+ }
+
+ , sorter: function (items) {
+ var beginswith = []
+ , caseSensitive = []
+ , caseInsensitive = []
+ , item
+
+ while (item = items.shift()) {
+ if (!item.toLowerCase().indexOf(this.query.toLowerCase())) beginswith.push(item)
+ else if (~item.indexOf(this.query)) caseSensitive.push(item)
+ else caseInsensitive.push(item)
+ }
+
+ return beginswith.concat(caseSensitive, caseInsensitive)
+ }
+
+ , highlighter: function (item) {
+ var query = this.query.replace(/[\-\[\]{}()*+?.,\\\^$|#\s]/g, '\\$&')
+ return item.replace(new RegExp('(' + query + ')', 'ig'), function ($1, match) {
+ return '<strong>' + match + '</strong>'
+ })
+ }
+
+ , render: function (items) {
+ var that = this
+
+ items = $(items).map(function (i, item) {
+ i = $(that.options.item).attr('data-value', item)
+ i.find('a').html(that.highlighter(item))
+ return i[0]
+ })
+
+ items.first().addClass('active')
+ this.$menu.html(items)
+ return this
+ }
+
+ , next: function (event) {
+ var active = this.$menu.find('.active').removeClass('active')
+ , next = active.next()
+
+ if (!next.length) {
+ next = $(this.$menu.find('li')[0])
+ }
+
+ next.addClass('active')
+ }
+
+ , prev: function (event) {
+ var active = this.$menu.find('.active').removeClass('active')
+ , prev = active.prev()
+
+ if (!prev.length) {
+ prev = this.$menu.find('li').last()
+ }
+
+ prev.addClass('active')
+ }
+
+ , listen: function () {
+ this.$element
+ .on('focus', $.proxy(this.focus, this))
+ .on('blur', $.proxy(this.blur, this))
+ .on('keypress', $.proxy(this.keypress, this))
+ .on('keyup', $.proxy(this.keyup, this))
+
+ if (this.eventSupported('keydown')) {
+ this.$element.on('keydown', $.proxy(this.keydown, this))
+ }
+
+ this.$menu
+ .on('click', $.proxy(this.click, this))
+ .on('mouseenter', 'li', $.proxy(this.mouseenter, this))
+ .on('mouseleave', 'li', $.proxy(this.mouseleave, this))
+ }
+
+ , eventSupported: function(eventName) {
+ var isSupported = eventName in this.$element
+ if (!isSupported) {
+ this.$element.setAttribute(eventName, 'return;')
+ isSupported = typeof this.$element[eventName] === 'function'
+ }
+ return isSupported
+ }
+
+ , move: function (e) {
+ if (!this.shown) return
+
+ switch(e.keyCode) {
+ case 9: // tab
+ case 13: // enter
+ case 27: // escape
+ e.preventDefault()
+ break
+
+ case 38: // up arrow
+ e.preventDefault()
+ this.prev()
+ break
+
+ case 40: // down arrow
+ e.preventDefault()
+ this.next()
+ break
+ }
+
+ e.stopPropagation()
+ }
+
+ , keydown: function (e) {
+ this.suppressKeyPressRepeat = ~$.inArray(e.keyCode, [40,38,9,13,27])
+ this.move(e)
+ }
+
+ , keypress: function (e) {
+ if (this.suppressKeyPressRepeat) return
+ this.move(e)
+ }
+
+ , keyup: function (e) {
+ switch(e.keyCode) {
+ case 40: // down arrow
+ case 38: // up arrow
+ case 16: // shift
+ case 17: // ctrl
+ case 18: // alt
+ break
+
+ case 9: // tab
+ case 13: // enter
+ if (!this.shown) return
+ this.select()
+ break
+
+ case 27: // escape
+ if (!this.shown) return
+ this.hide()
+ break
+
+ default:
+ this.lookup()
+ }
+
+ e.stopPropagation()
+ e.preventDefault()
+ }
+
+ , focus: function (e) {
+ this.focused = true
+ }
+
+ , blur: function (e) {
+ this.focused = false
+ if (!this.mousedover && this.shown) this.hide()
+ }
+
+ , click: function (e) {
+ e.stopPropagation()
+ e.preventDefault()
+ this.select()
+ this.$element.focus()
+ }
+
+ , mouseenter: function (e) {
+ this.mousedover = true
+ this.$menu.find('.active').removeClass('active')
+ $(e.currentTarget).addClass('active')
+ }
+
+ , mouseleave: function (e) {
+ this.mousedover = false
+ if (!this.focused && this.shown) this.hide()
+ }
+
+ }
+
+
+ /* TYPEAHEAD PLUGIN DEFINITION
+ * =========================== */
+
+ var old = $.fn.typeahead
+
+ $.fn.typeahead = function (option) {
+ return this.each(function () {
+ var $this = $(this)
+ , data = $this.data('typeahead')
+ , options = typeof option == 'object' && option
+ if (!data) $this.data('typeahead', (data = new Typeahead(this, options)))
+ if (typeof option == 'string') data[option]()
+ })
+ }
+
+ $.fn.typeahead.defaults = {
+ source: []
+ , items: 8
+ , menu: '<ul class="typeahead dropdown-menu"></ul>'
+ , item: '<li><a href="#"></a></li>'
+ , minLength: 1
+ }
+
+ $.fn.typeahead.Constructor = Typeahead
+
+
+ /* TYPEAHEAD NO CONFLICT
+ * =================== */
+
+ $.fn.typeahead.noConflict = function () {
+ $.fn.typeahead = old
+ return this
+ }
+
+
+ /* TYPEAHEAD DATA-API
+ * ================== */
+
+ $(document).on('focus.typeahead.data-api', '[data-provide="typeahead"]', function (e) {
+ var $this = $(this)
+ if ($this.data('typeahead')) return
+ $this.typeahead($this.data())
+ })
+
+}(window.jQuery);
+/* ==========================================================
+ * bootstrap-affix.js v2.3.2
+ * http://getbootstrap.com/2.3.2/javascript.html#affix
+ * ==========================================================
+ * Copyright 2013 Twitter, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ========================================================== */
+
+
+!function ($) {
+
+ "use strict"; // jshint ;_;
+
+
+ /* AFFIX CLASS DEFINITION
+ * ====================== */
+
+ var Affix = function (element, options) {
+ this.options = $.extend({}, $.fn.affix.defaults, options)
+ this.$window = $(window)
+ .on('scroll.affix.data-api', $.proxy(this.checkPosition, this))
+ .on('click.affix.data-api', $.proxy(function () { setTimeout($.proxy(this.checkPosition, this), 1) }, this))
+ this.$element = $(element)
+ this.checkPosition()
+ }
+
+ Affix.prototype.checkPosition = function () {
+ if (!this.$element.is(':visible')) return
+
+ var scrollHeight = $(document).height()
+ , scrollTop = this.$window.scrollTop()
+ , position = this.$element.offset()
+ , offset = this.options.offset
+ , offsetBottom = offset.bottom
+ , offsetTop = offset.top
+ , reset = 'affix affix-top affix-bottom'
+ , affix
+
+ if (typeof offset != 'object') offsetBottom = offsetTop = offset
+ if (typeof offsetTop == 'function') offsetTop = offset.top()
+ if (typeof offsetBottom == 'function') offsetBottom = offset.bottom()
+
+ affix = this.unpin != null && (scrollTop + this.unpin <= position.top) ?
+ false : offsetBottom != null && (position.top + this.$element.height() >= scrollHeight - offsetBottom) ?
+ 'bottom' : offsetTop != null && scrollTop <= offsetTop ?
+ 'top' : false
+
+ if (this.affixed === affix) return
+
+ this.affixed = affix
+ this.unpin = affix == 'bottom' ? position.top - scrollTop : null
+
+ this.$element.removeClass(reset).addClass('affix' + (affix ? '-' + affix : ''))
+ }
+
+
+ /* AFFIX PLUGIN DEFINITION
+ * ======================= */
+
+ var old = $.fn.affix
+
+ $.fn.affix = function (option) {
+ return this.each(function () {
+ var $this = $(this)
+ , data = $this.data('affix')
+ , options = typeof option == 'object' && option
+ if (!data) $this.data('affix', (data = new Affix(this, options)))
+ if (typeof option == 'string') data[option]()
+ })
+ }
+
+ $.fn.affix.Constructor = Affix
+
+ $.fn.affix.defaults = {
+ offset: 0
+ }
+
+
+ /* AFFIX NO CONFLICT
+ * ================= */
+
+ $.fn.affix.noConflict = function () {
+ $.fn.affix = old
+ return this
+ }
+
+
+ /* AFFIX DATA-API
+ * ============== */
+
+ $(window).on('load', function () {
+ $('[data-spy="affix"]').each(function () {
+ var $spy = $(this)
+ , data = $spy.data()
+
+ data.offset = data.offset || {}
+
+ data.offsetBottom && (data.offset.bottom = data.offsetBottom)
+ data.offsetTop && (data.offset.top = data.offsetTop)
+
+ $spy.affix(data)
+ })
+ })
+
+
+}(window.jQuery);
\ No newline at end of file
[16/18] incubator-aurora-website git commit: Initial move of website
over to git
Posted by jf...@apache.org.
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/publish/assets/js/bootstrap.min.js
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diff --git a/publish/assets/js/bootstrap.min.js b/publish/assets/js/bootstrap.min.js
new file mode 100644
index 0000000..94b68fb
--- /dev/null
+++ b/publish/assets/js/bootstrap.min.js
@@ -0,0 +1,7 @@
+/*!
+* Bootstrap.js by @fat & @mdo
+* Copyright 2013 Twitter, Inc.
+* http://www.apache.org/licenses/LICENSE-2.0.txt
+*/
+
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[18/18] incubator-aurora-website git commit: Initial move of website
over to git
Posted by jf...@apache.org.
Initial move of website over to git
Project: http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/repo
Commit: http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/commit/c43a3a2d
Tree: http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/tree/c43a3a2d
Diff: http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/diff/c43a3a2d
Branch: refs/heads/master
Commit: c43a3a2d8d4b4f6b16d502a5262923737d5033a2
Parents:
Author: jfarrell <jf...@apache.org>
Authored: Wed Dec 17 13:29:56 2014 -0500
Committer: jfarrell <jf...@apache.org>
Committed: Wed Dec 17 13:29:56 2014 -0500
----------------------------------------------------------------------
Gemfile | 10 +
Gemfile.lock | 130 +
LICENSE | 205 ++
README.md | 56 +
Rakefile | 52 +
config.rb | 62 +
publish/assets/css/main.css | 79 +
publish/assets/img/apache_incubator_logo.png | Bin 0 -> 11806 bytes
publish/assets/img/aurora_image_1600.jpg | Bin 0 -> 705120 bytes
publish/assets/img/aurora_logo.png | Bin 0 -> 15106 bytes
publish/assets/img/aurora_logo_dkbkg.svg | 240 ++
publish/assets/img/aurora_logo_ltgreen_bkg.svg | 240 ++
publish/assets/img/aurora_logo_white_bkg.svg | 240 ++
publish/assets/img/favicon.ico | Bin 0 -> 3638 bytes
.../assets/img/glyphicons-halflings-white.png | Bin 0 -> 8777 bytes
publish/assets/img/glyphicons-halflings.png | Bin 0 -> 12799 bytes
publish/assets/js/bootstrap.js | 2281 ++++++++++++++++++
publish/assets/js/bootstrap.min.js | 7 +
publish/assets/js/jquery-1.11.1.min.js | 5 +
.../aurora-0-6-0-incubating-released/index.html | 157 ++
publish/blog/feed.xml | 78 +
publish/blog/index.html | 83 +
publish/community/index.html | 104 +
publish/developers/index.html | 84 +
publish/docs/gettingstarted/index.html | 73 +
publish/docs/howtocontribute/index.html | 115 +
.../client-cluster-configuration/index.html | 183 ++
.../latest/client-commands/index.html | 586 +++++
.../documentation/latest/clientv2/index.html | 491 ++++
.../documentation/latest/committers/index.html | 141 ++
.../latest/configuration-reference/index.html | 879 +++++++
.../latest/configuration-tutorial/index.html | 1218 ++++++++++
.../latest/contributing/index.html | 133 +
.../documentation/latest/cron-jobs/index.html | 215 ++
.../deploying-aurora-scheduler/index.html | 368 +++
.../latest/developing-aurora-client/index.html | 201 ++
.../developing-aurora-scheduler/index.html | 163 ++
publish/documentation/latest/hooks/index.html | 327 +++
.../latest/images/CPUavailability.png | Bin 0 -> 26371 bytes
.../latest/images/HelloWorldJob.png | Bin 0 -> 44392 bytes
.../documentation/latest/images/RoleJobs.png | Bin 0 -> 59734 bytes
.../latest/images/ScheduledJobs.png | Bin 0 -> 40758 bytes
.../latest/images/TaskBreakdown.png | Bin 0 -> 89794 bytes
.../latest/images/aurora_hierarchy.png | Bin 0 -> 40856 bytes
.../documentation/latest/images/killedtask.png | Bin 0 -> 73312 bytes
.../documentation/latest/images/lifeofatask.png | Bin 0 -> 62645 bytes
.../documentation/latest/images/runningtask.png | Bin 0 -> 58821 bytes
publish/documentation/latest/images/stderr.png | Bin 0 -> 16176 bytes
publish/documentation/latest/images/stdout.png | Bin 0 -> 32941 bytes
.../latest/images/storage_hierarchy.png | Bin 0 -> 87035 bytes
publish/documentation/latest/index.html | 118 +
.../documentation/latest/monitoring/index.html | 315 +++
.../latest/resource-isolation/index.html | 220 ++
.../latest/scheduler-storage/index.html | 117 +
publish/documentation/latest/sla/index.html | 265 ++
.../latest/storage-config/index.html | 234 ++
publish/documentation/latest/storage/index.html | 166 ++
.../latest/test-resource-generation/index.html | 97 +
.../documentation/latest/tutorial/index.html | 327 +++
.../documentation/latest/user-guide/index.html | 462 ++++
publish/documentation/latest/vagrant/index.html | 121 +
publish/downloads/index.html | 96 +
publish/index.html | 105 +
source/_footer.md.erb | 25 +
source/_header_homepage.md.erb | 22 +
source/_header_normal.md.erb | 13 +
source/assets/css/main.css | 79 +
source/assets/img/apache_incubator_logo.png | Bin 0 -> 11806 bytes
source/assets/img/aurora_image_1600.jpg | Bin 0 -> 705120 bytes
source/assets/img/aurora_logo.png | Bin 0 -> 15106 bytes
source/assets/img/aurora_logo_dkbkg.svg | 240 ++
source/assets/img/aurora_logo_ltgreen_bkg.svg | 240 ++
source/assets/img/aurora_logo_white_bkg.svg | 240 ++
source/assets/img/favicon.ico | Bin 0 -> 3638 bytes
.../assets/img/glyphicons-halflings-white.png | Bin 0 -> 8777 bytes
source/assets/img/glyphicons-halflings.png | Bin 0 -> 12799 bytes
source/assets/js/bootstrap.js | 2280 +++++++++++++++++
source/assets/js/bootstrap.min.js | 6 +
source/assets/js/jquery-1.11.1.min.js | 4 +
source/blog.html.erb | 18 +
...14-12-08-aurora-0-6-0-incubating-released.md | 54 +
source/blog/feed.xml.erb | 25 +
source/community.html.md | 34 +
source/developers.html.md | 13 +
source/docs/gettingstarted.html.md | 3 +
source/docs/howtocontribute.html.md | 50 +
source/documentation/latest.html.md | 36 +
.../latest/client-cluster-configuration.md | 71 +
source/documentation/latest/client-commands.md | 516 ++++
source/documentation/latest/clientv2.md | 406 ++++
source/documentation/latest/committers.md | 79 +
.../latest/configuration-reference.md | 538 +++++
.../latest/configuration-tutorial.md | 1147 +++++++++
source/documentation/latest/contributing.md | 68 +
source/documentation/latest/cron-jobs.md | 131 +
.../latest/deploying-aurora-scheduler.md | 259 ++
.../latest/developing-aurora-client.md | 122 +
.../latest/developing-aurora-scheduler.md | 108 +
source/documentation/latest/hooks.md | 244 ++
.../latest/images/CPUavailability.png | Bin 0 -> 26371 bytes
.../latest/images/HelloWorldJob.png | Bin 0 -> 44392 bytes
source/documentation/latest/images/RoleJobs.png | Bin 0 -> 59734 bytes
.../latest/images/ScheduledJobs.png | Bin 0 -> 40758 bytes
.../latest/images/TaskBreakdown.png | Bin 0 -> 89794 bytes
.../latest/images/aurora_hierarchy.png | Bin 0 -> 40856 bytes
.../documentation/latest/images/killedtask.png | Bin 0 -> 73312 bytes
.../documentation/latest/images/lifeofatask.png | Bin 0 -> 62645 bytes
.../documentation/latest/images/runningtask.png | Bin 0 -> 58821 bytes
source/documentation/latest/images/stderr.png | Bin 0 -> 16176 bytes
source/documentation/latest/images/stdout.png | Bin 0 -> 32941 bytes
.../latest/images/storage_hierarchy.png | Bin 0 -> 87035 bytes
source/documentation/latest/monitoring.md | 206 ++
.../documentation/latest/resource-isolation.md | 147 ++
.../documentation/latest/scheduler-storage.md | 47 +
source/documentation/latest/sla.md | 176 ++
source/documentation/latest/storage-config.md | 142 ++
source/documentation/latest/storage.md | 88 +
.../latest/test-resource-generation.md | 25 +
source/documentation/latest/tutorial.md | 265 ++
source/documentation/latest/user-guide.md | 363 +++
source/documentation/latest/vagrant.md | 51 +
source/downloads.html.md | 26 +
source/index.html.md | 29 +
source/layouts/documentation.erb | 14 +
source/layouts/layout.erb | 37 +
source/layouts/post.erb | 40 +
126 files changed, 20576 insertions(+)
----------------------------------------------------------------------
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/Gemfile
----------------------------------------------------------------------
diff --git a/Gemfile b/Gemfile
new file mode 100644
index 0000000..1b90894
--- /dev/null
+++ b/Gemfile
@@ -0,0 +1,10 @@
+source 'https://rubygems.org'
+
+gem 'middleman', '3.2.0'
+gem 'middleman-livereload', '3.1.0'
+gem 'middleman-syntax', '1.2.1'
+gem 'therubyracer', '0.12.1'
+gem 'middleman-blog', '3.5.1'
+gem "htmlentities"
+gem 'redcarpet', github: 'vmg/redcarpet'
+gem 'rake', '10.3.1'
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/Gemfile.lock
----------------------------------------------------------------------
diff --git a/Gemfile.lock b/Gemfile.lock
new file mode 100644
index 0000000..9481be6
--- /dev/null
+++ b/Gemfile.lock
@@ -0,0 +1,130 @@
+GIT
+ remote: git://github.com/vmg/redcarpet.git
+ revision: 5ffeb37fd5ef9bb5f163839ec5842a178049eb67
+ specs:
+ redcarpet (3.1.1)
+
+GEM
+ remote: https://rubygems.org/
+ specs:
+ activesupport (3.2.15)
+ i18n (~> 0.6, >= 0.6.4)
+ multi_json (~> 1.0)
+ addressable (2.3.5)
+ atomic (1.1.14)
+ chunky_png (1.2.9)
+ coffee-script (2.2.0)
+ coffee-script-source
+ execjs
+ coffee-script-source (1.6.3)
+ compass (0.12.2)
+ chunky_png (~> 1.2)
+ fssm (>= 0.2.7)
+ sass (~> 3.1)
+ em-websocket (0.5.0)
+ eventmachine (>= 0.12.9)
+ http_parser.rb (~> 0.5.3)
+ eventmachine (1.0.3)
+ execjs (1.4.0)
+ multi_json (~> 1.0)
+ ffi (1.9.3)
+ fssm (0.2.10)
+ haml (4.0.4)
+ tilt
+ hike (1.2.3)
+ htmlentities (4.3.2)
+ http_parser.rb (0.5.3)
+ i18n (0.6.5)
+ kramdown (1.2.0)
+ libv8 (3.16.14.3)
+ listen (1.3.1)
+ rb-fsevent (>= 0.9.3)
+ rb-inotify (>= 0.9)
+ rb-kqueue (>= 0.2)
+ middleman (3.2.0)
+ coffee-script (~> 2.2.0)
+ compass (>= 0.12.2)
+ execjs (~> 1.4.0)
+ haml (>= 3.1.6)
+ kramdown (~> 1.2)
+ middleman-core (= 3.2.0)
+ middleman-sprockets (>= 3.1.2)
+ sass (>= 3.1.20)
+ uglifier (~> 2.1.0)
+ middleman-blog (3.5.1)
+ addressable (~> 2.3.5)
+ middleman-core (~> 3.2)
+ tzinfo (>= 0.3.0)
+ middleman-core (3.2.0)
+ activesupport (~> 3.2.6)
+ bundler (~> 1.1)
+ i18n (~> 0.6.1)
+ listen (~> 1.1)
+ rack (>= 1.4.5)
+ rack-test (~> 0.6.1)
+ thor (>= 0.15.2, < 2.0)
+ tilt (~> 1.3.6)
+ middleman-livereload (3.1.0)
+ em-websocket (>= 0.2.0)
+ middleman-core (>= 3.0.2)
+ multi_json (~> 1.0)
+ rack-livereload
+ middleman-sprockets (3.2.0)
+ middleman-core (~> 3.2)
+ sprockets (~> 2.1)
+ sprockets-helpers (~> 1.0.0)
+ sprockets-sass (~> 1.0.0)
+ middleman-syntax (1.2.1)
+ middleman-core (~> 3.0)
+ rouge (~> 0.3.0)
+ multi_json (1.8.2)
+ rack (1.5.2)
+ rack-livereload (0.3.15)
+ rack
+ rack-test (0.6.2)
+ rack (>= 1.0)
+ rake (10.3.1)
+ rb-fsevent (0.9.3)
+ rb-inotify (0.9.2)
+ ffi (>= 0.5.0)
+ rb-kqueue (0.2.0)
+ ffi (>= 0.5.0)
+ ref (1.0.5)
+ rouge (0.3.10)
+ thor
+ sass (3.2.12)
+ sprockets (2.10.0)
+ hike (~> 1.2)
+ multi_json (~> 1.0)
+ rack (~> 1.0)
+ tilt (~> 1.1, != 1.3.0)
+ sprockets-helpers (1.0.1)
+ sprockets (~> 2.0)
+ sprockets-sass (1.0.2)
+ sprockets (~> 2.0)
+ tilt (~> 1.1)
+ therubyracer (0.12.1)
+ libv8 (~> 3.16.14.0)
+ ref
+ thor (0.18.1)
+ thread_safe (0.1.3)
+ atomic
+ tilt (1.3.7)
+ tzinfo (1.1.0)
+ thread_safe (~> 0.1)
+ uglifier (2.1.2)
+ execjs (>= 0.3.0)
+ multi_json (~> 1.0, >= 1.0.2)
+
+PLATFORMS
+ ruby
+
+DEPENDENCIES
+ htmlentities
+ middleman (= 3.2.0)
+ middleman-blog (= 3.5.1)
+ middleman-livereload (= 3.1.0)
+ middleman-syntax (= 1.2.1)
+ rake (= 10.3.1)
+ redcarpet!
+ therubyracer (= 0.12.1)
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/LICENSE
----------------------------------------------------------------------
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..43e7580
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,205 @@
+
+ Apache License
+ Version 2.0, January 2004
+ http://www.apache.org/licenses/
+
+ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
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+ Licensed under the Apache License, Version 2.0 (the "License");
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+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
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+--------------------------------------------------
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http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/README.md
----------------------------------------------------------------------
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..b484f13
--- /dev/null
+++ b/README.md
@@ -0,0 +1,56 @@
+# Apache Aurora Website
+This will generate the Apache Aurora available at http://aurora.apache.org. The content
+within the publish folder will be the actual deployed site.
+
+
+## Setup
+
+ gem install bundler
+ bundle install
+
+
+## Generating the site
+To generate the site one only needs to run `rake` after performing the setup
+tasks mentioned above. This will download the latest Apache Aurora documentation
+contained in the `docs` folder, integrate them into the site, and generate all
+other files within the source folder.
+
+ rake
+
+
+## Development
+To live edit the site run `rake dev` and then open a browser window to
+http://localhost:4567/ . Any change you make to the sources dir will
+be shown on the local dev site immediately. Errors will be shown in the
+console you launched `rake dev` within.
+
+
+## Other available tasks
+
+ rake build # Build the website from source
+ rake clean # Remove any temporary products
+ rake clobber # Remove any generated file
+ rake dev # Run the site in development mode
+ rake update_docs # Update the latest docs from the Apache Aurora codebase
+
+
+## Publishing the Site
+The website uses svnpubsub. The publish folder contains the websites content
+and when committed to the svn repository it will be automatically deployed to
+the live site.
+
+
+### Apache License
+Except as otherwise noted this software is licensed under the [Apache License, Version 2.0](http://www.apache.org/licenses/LICENSE-2.0.html)
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/Rakefile
----------------------------------------------------------------------
diff --git a/Rakefile b/Rakefile
new file mode 100644
index 0000000..4975c5e
--- /dev/null
+++ b/Rakefile
@@ -0,0 +1,52 @@
+require 'rubygems'
+require 'rake/clean'
+require 'fileutils'
+
+task :default => [:update_docs, :build, :clean]
+
+CLEAN.include "**/.DS_Store"
+
+desc "Build the website from source"
+task :build do
+ puts "Building website from static source"
+ result = system("middleman build --clean")
+ if result
+ puts "Successfully generated the site, please commit your changes"
+ else
+ puts "An error was encountered when generating the site"
+ end
+end
+
+desc "Update the latest docs from the Apache Aurora codebase"
+task :update_docs do
+ puts "Updating latest documentation from the Apache Aurora codebase"
+
+ tmp_dir = File.join(File.dirname(__FILE__), "tmp")
+ docs_dir = File.join(File.dirname(__FILE__), "source/documentation")
+ Rake::Task[:clean].invoke if File.exist?(tmp_dir)
+
+ puts "Cloning Apache Aurora codebase"
+ FileUtils.mkdir_p(tmp_dir)
+ system("git clone --depth 1 http://git-wip-us.apache.org/repos/asf/incubator-aurora.git #{tmp_dir}/aurora")
+ puts "Updating docs to the latest version"
+ FileUtils.rm_f(Dir.glob("source/documentation/latest/*.md"))
+ FileUtils.cp_r(Dir.glob("#{tmp_dir}/aurora/docs/images/"), File.expand_path("source/documentation/latest/"))
+ FileUtils.cp_r(Dir.glob("#{tmp_dir}/aurora/docs/*.md"), File.expand_path("source/documentation/latest/"))
+ puts "Parse documentation files to removing md extension in any links"
+ Dir.chdir("#{docs_dir}/latest/") {
+ Dir.glob('*.md').each { |doc|
+ puts "working on: #{doc}"
+ IO.write(doc, File.open(doc) { |f|
+ f.read.gsub(/\(([A-Za-z0-9-]+)(\.md)\)/, '(/documentation/latest/\1/)')
+ })
+ }
+ }
+ puts "Moving documentation index to its own 'latest' directory"
+ FileUtils.mv("source/documentation/latest/README.md", "source/documentation/latest.html.md")
+ puts "Documentation updated"
+end
+
+desc "Run the site in development mode. Preview available at http://localhost:4567/"
+task :dev do
+ system("middleman server")
+end
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/config.rb
----------------------------------------------------------------------
diff --git a/config.rb b/config.rb
new file mode 100644
index 0000000..66b95ad
--- /dev/null
+++ b/config.rb
@@ -0,0 +1,62 @@
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+# Per-page layout changes:
+#
+# With no layout
+# page "/path/to/file.html", :layout => false
+#
+# With alternative layout
+# page "/path/to/file.html", :layout => :otherlayout
+#
+# A path which all have the same layout
+# with_layout :admin do
+# page "/admin/*"
+# end
+
+require "middleman-blog"
+require "htmlentities"
+
+set :markdown_engine, :redcarpet
+set :markdown, :layout_engine => :erb,
+ :tables => true,
+ :autolink => true,
+ :smartypants => true,
+ :fenced_code_blocks => true,
+ :with_toc_data => true
+
+set :build_dir, 'publish'
+
+set :css_dir, 'assets/css'
+set :js_dir, 'assets/js'
+set :images_dir, 'assets/img'
+
+# Build-specific configuration
+configure :build do
+ activate :relative_assets
+end
+
+page "/blog/feed.xml", :layout => false
+
+activate :blog do |blog|
+ blog.prefix = "blog"
+ blog.sources = "{year}-{month}-{day}-{title}"
+ blog.default_extension = ".md"
+ blog.layout = "post",
+ blog.permalink = ":title"
+end
+
+activate :directory_indexes
+activate :syntax
+activate :livereload
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/publish/assets/css/main.css
----------------------------------------------------------------------
diff --git a/publish/assets/css/main.css b/publish/assets/css/main.css
new file mode 100644
index 0000000..d4aa2c3
--- /dev/null
+++ b/publish/assets/css/main.css
@@ -0,0 +1,79 @@
+body {
+ background: rgba(0,0,0,0.04);
+}
+.container.content {
+ background: #fff;
+}
+h1, h2, h3 {
+ color: #004a63;
+}
+span.glyphicon {
+ font-size: 6em;
+ padding-top: 25px;
+}
+.section-ltgreen {
+ background: #40c3b0;
+ color: #fff;
+ font-size: 1.3em;
+ text-shadow: .5px .5px 0px #1b5d3e;
+}
+.section-ltgreen h2 {
+ color: #fff;
+}
+.section-footer {
+ background: #eee;
+}
+.section-homepage-header {
+ background-image: url("/assets/img/aurora_image_1600.jpg");
+ background-size: cover;
+ background-position: center bottom;
+}
+.section-homepage-header h1 {
+ color: #fff;
+ text-shadow: 1px 1px 3px #000;
+}
+.section-header {
+ background-image: url("/assets/img/aurora_image_1600.jpg");
+ background-size: cover;
+ color: #000;
+ background-color: #40c3b0;
+}
+.nav-bar a {
+ color: #fff;
+}
+.navbar li a:hover {
+ text-decoration-color: #40c3b0;
+ color: #fff;
+}
+.nav-bar li a:hover {
+ background: none;
+ text-decoration: underline;
+}
+.nav-bar li {
+ margin: 10px;
+ padding-top: 20px;
+}
+.buffer {
+ padding: 30px 0 30px 0;
+}
+.disclaimer {
+ font-size: .9em;
+ color: #AAA;
+}
+iframe {
+ border: none;
+}
+.author_contact {
+ display: inline-block;
+}
+.author_gravatar {
+ display: inline;
+ padding: 0 20px 20px 5px;
+}
+.share {
+ display: block;
+}
+code, pre {
+ color: #000;
+ border: none;
+}
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/publish/assets/img/apache_incubator_logo.png
----------------------------------------------------------------------
diff --git a/publish/assets/img/apache_incubator_logo.png b/publish/assets/img/apache_incubator_logo.png
new file mode 100644
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http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/publish/assets/img/aurora_image_1600.jpg
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http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/publish/assets/img/aurora_logo.png
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diff --git a/publish/assets/img/aurora_logo.png b/publish/assets/img/aurora_logo.png
new file mode 100644
index 0000000..abcfbb8
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http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/publish/assets/img/aurora_logo_dkbkg.svg
----------------------------------------------------------------------
diff --git a/publish/assets/img/aurora_logo_dkbkg.svg b/publish/assets/img/aurora_logo_dkbkg.svg
new file mode 100644
index 0000000..36b714b
--- /dev/null
+++ b/publish/assets/img/aurora_logo_dkbkg.svg
@@ -0,0 +1,240 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+ xmlns:dc="http://purl.org/dc/elements/1.1/"
+ xmlns:cc="http://creativecommons.org/ns#"
+ xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+ xmlns:svg="http://www.w3.org/2000/svg"
+ xmlns="http://www.w3.org/2000/svg"
+ xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+ version="1.1"
+ width="425"
+ height="157.5"
+ id="svg2"
+ xml:space="preserve"><metadata
+ id="metadata8"><rdf:RDF><cc:Work
+ rdf:about=""><dc:format>image/svg+xml</dc:format><dc:type
+ rdf:resource="http://purl.org/dc/dcmitype/StillImage" /></cc:Work></rdf:RDF></metadata><defs
+ id="defs6"><clipPath
+ id="clipPath114"><path
+ d="M 0,150 660,150 660,0 0,0 0,150 z"
+ inkscape:connector-curvature="0"
+ id="path116" /></clipPath><clipPath
+ id="clipPath162"><path
+ d="M 0,150 660,150 660,0 0,0 0,150 z"
+ inkscape:connector-curvature="0"
+ id="path164" /></clipPath></defs><g
+ transform="matrix(1.25,0,0,-1.25,0,187.5)"
+ id="g10"><path
+ d="M 0,0 330,0 330,150 0,150 0,0 z"
+ inkscape:connector-curvature="0"
+ id="path12"
+ style="fill:none;fill-opacity:1;fill-rule:nonzero;stroke:none" /><g
+ transform="translate(89.4268,98.3438)"
+ id="g14"><path
+ d="M 0,0 -18.35,0 -9.16,-15.824 0,0 z"
+ inkscape:connector-curvature="0"
+ id="path16"
+ style="fill:#63c4b1;fill-opacity:1;fill-rule:nonzero;stroke:none" /></g><g
+ transform="translate(69.2861,97.3203)"
+ id="g18"><path
+ d="m 0,0 -9.166,-15.852 18.354,0 L 0,0 z"
+ inkscape:connector-curvature="0"
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+ style="fill:#63c4b1;fill-opacity:1;fill-rule:nonzero;stroke:none" /></g><g
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+ id="g22"><path
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+ inkscape:connector-curvature="0"
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+ style="fill:#63c4b1;fill-opacity:1;fill-rule:nonzero;stroke:none" /></g><g
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[05/18] incubator-aurora-website git commit: Initial move of website
over to git
Posted by jf...@apache.org.
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[13/18] incubator-aurora-website git commit: Initial move of website
over to git
Posted by jf...@apache.org.
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/publish/documentation/latest/clientv2/index.html
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+<!DOCTYPE html>
+<html lang="en">
+ <head>
+ <meta charset="utf-8">
+ <meta name="viewport" content="width=device-width, initial-scale=1">
+ <title>Apache Aurora</title>
+ <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css">
+ <link href="/assets/css/main.css" rel="stylesheet">
+ <!-- Analytics -->
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+ })();
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+ </head>
+ <body>
+
+ <div class="container-fluid section-header">
+ <div class="container">
+ <div class="nav nav-bar">
+ <a href="/"><img src="/assets/img/aurora_logo_white_bkg.svg" width="300" alt="Transparent Apache Aurora logo with dark background"/></a>
+ <ul class="nav navbar-nav navbar-right">
+ <li><a href="/documentation/latest/">Documentation</a></li>
+ <li><a href="/community/">Community</a></li>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/blog/">Blog</a></li>
+ </ul>
+ </div>
+ </div>
+</div>
+ <div class="container-fluid">
+ <div class="container content">
+ <h1 id="aurora-client-v2">Aurora Client v2</h1>
+
+<h2 id="overview">Overview</h2>
+
+<p>Our goal is to replace the current Aurora command-line client. The
+current client suffers from an early monolithic structure, and a long
+development history of rapid unplanned evolution.</p>
+
+<p>In addition to its internal problems, the current Aurora client is
+confusing for users. There are several different kinds of objects
+manipulated by the Aurora command line, and the difference between
+them is often not clear. (What’s the difference between a job and a
+configuration?) For each type of object, there are different commands,
+and it’s hard to remember which command should be used for which kind
+of object.</p>
+
+<p>Instead of continuing to let the Aurora client develop and evolve
+randomly, it’s time to take a principled look at the Aurora command
+line, and figure out how to make our command line processing make
+sense. At the same time, the code needs to be cleaned up, and divided
+into small comprehensible units based on a plugin architecture.</p>
+
+<p>Doing this now will give us a more intuitive, consistent, and easy to
+use client, as well as a sound platform for future development.</p>
+
+<h2 id="goals">Goals</h2>
+
+<ul>
+<li>A command line tool for interacting with Aurora that is easy for
+users to understand.</li>
+<li>A noun/verb command model.</li>
+<li>A modular source-code architecture.</li>
+<li>Non-disruptive transition for users.</li>
+</ul>
+
+<h2 id="non-goals">Non-Goals</h2>
+
+<ul>
+<li>The most important non-goal is that we’re not trying to redesign the
+Aurora scheduler, the Aurora executor, or any of the peripheral tools
+that the Aurora command line interacts with; we only want to create a
+better command line client.</li>
+<li>We do not want to change thermos, mesos, hadoop, etc.</li>
+<li>We do not want to create new objects that users will work with to
+interact with Mesos or Aurora.</li>
+<li>We do not want to change Aurora job configuration files or file formats.</li>
+<li>We do not want to change the Aurora API.</li>
+<li>We don’t want to boil the ocean: there are many things that we could
+include in the scope of this project, but we don’t want to be
+distracted by re-implementing all of twitter.commons in order to
+create a perfect Aurora client.</li>
+</ul>
+
+<h2 id="background">Background</h2>
+
+<p>Aurora is a system that’s used to run and manage services and
+service-like jobs running in a datacenter. Aurora takes care of
+allocating resources in order to schedule and run jobs without
+requiring teams to manage dedicated hardware. The heart of Aurora is
+called the scheduler, and is responsible for finding and assigning
+resources to tasks.</p>
+
+<p>The Aurora scheduler provides a thrift API. The scheduler API is
+low-level and difficult to interact with. Users do not interact
+directly with the Aurora API; instead, they use a command-line tool,
+which provides a collection of easy-to-use commands. This command-line
+tool, in turn, talks to the scheduler API to launch and manage jobs in
+datacenter clusters. The command-line tool is called the Aurora
+client.</p>
+
+<p>The current implementation of the Aurora client is haphazard,
+and really needs to be cleaned up:</p>
+
+<ul>
+<li>The code is monolithic and hard to maintain. It’s implemented using
+<code>twitter.common.app</code>, which assumes that all of the command code lives
+in a single source file. To work around this, and allow some
+subdivision, it uses a hack of <code>twitter.common.app</code> to force
+registration of commands from multiple modules. It’s hard to
+understand, and hard to modify.</li>
+<li>The current code is very difficult to test. Because of the way it’s
+built, there is no consistent way of passing key application data
+around. As a result, each unit test of client operations needs a
+difficult-to-assemble custom setup of mock objects.</li>
+<li>The current code handles errors poorly, and it is difficult to
+fix. Many common errors produce unacceptable results. For example,
+issuing an unknown command generates an error message “main takes 0
+parameters but received 1”; passing an invalid parameter to other
+commands frequently produces a stack trace.</li>
+<li>The current command line is confusing for users. There are several
+different kinds of objects manipulated by the Aurora command line,
+and the difference between them is often not entirely clear. (What’s
+the difference between a job and a configuration?)
+For each type of object, there are different
+commands, and it’s frequently not clear just which command should be
+used for which object.</li>
+</ul>
+
+<p>Instead of continuing to let it develop and evolve randomly, it’s time
+to take a principled look at the Aurora command line, and figure out
+how to make command line processing make sense. At the same time, the
+code needs to be cleaned up, and divided into small comprehensible
+units based on a plugin architecture.</p>
+
+<h2 id="requirements">Requirements</h2>
+
+<p>Aurora is aimed at engineers who run jobs and services in a
+datacenter. As a result, the requirements for the aurora client are
+all engineering focused:</p>
+
+<ul>
+<li><strong>Consistency</strong>: commands should follow a consistent structure, so that
+users can apply knowledge and intuition gained from working with
+some aurora commands to new commands. This means that when commands
+can re-use the same options, they should; that objects should be
+referred to by consistent syntax throughout the tool.</li>
+<li><strong>Helpfulness</strong>: commands should be structured so that the system can
+generate helpful error messages. If a user just runs “aurora”, they
+should get a basic usage message. If they try to run an invalid
+command, they should get a message that the command is invalid, not
+a stack dump or “command main() takes 0 parameters but received
+2”. Commands should not generate extraneous output that obscures the
+key facts that the user needs to know, and the default behavior of
+commands should not generate outputs that will be routinely ignored
+by users.</li>
+<li><strong>Extensibility</strong>: it should be easy to plug in new commands,
+including custom commands, to adapt the Aurora client to new
+environments.</li>
+<li><strong>Script-friendly command output</strong>: every command should at least include
+an option that generates output that’s script-friendly. Scripts should be
+able to work with command-output without needing to do screen scraping.</li>
+<li><strong>Scalability</strong>: the tools should be usable for any foreseeable size
+of Aurora datacenters and machine clusters.</li>
+</ul>
+
+<h2 id="design-overview">Design Overview</h2>
+
+<p>The Aurora client will be reimplemented using a noun-verb model,
+similar to the cmdlet model used by Monad/Windows Powershell. Users
+will work by providing a noun for the type of object being operated
+on, and a verb for the specific operation being performed on the
+object, followed by parameters. For example, to create a job, the user
+would execute: “<code>aurora job create smfd/mchucarroll/devel/jobname
+job.aurora</code>”. The noun is <code>job</code> and the verb is <code>create</code>.</p>
+
+<p>The client will be implemented following that noun-verb
+convention. Each noun will be a separate component, which can be
+registered into the command-line framework. Each verb will be
+implemented by a class that registers with the appropriate noun. Nouns
+and verbs will each provide methods that add their command line
+options and parameters to the options parser, using the Python
+argparse library.</p>
+
+<h2 id="detailed-design">Detailed Design</h2>
+
+<h3 id="interface">Interface</h3>
+
+<p>In this section, we’ll walk through the types of objects that the
+client can manipulate, and the operations that need to be provided for
+each object. These form the primary interface that engineers will use
+to interact with Aurora.</p>
+
+<p>In the command-line, each of the object types will have an Aurora
+subcommand. The commands to manipulate the object type will follow the
+type. For example, here are several commands in the old syntax
+contrasted against the new noun/verb syntax.</p>
+
+<ul>
+<li>Get quota for a role:
+
+<ul>
+<li>Noun/Verb syntax: <code>aurora quota get west/www-data</code></li>
+<li>Old syntax: <code>aurora get_quota --cluster=smf1 www-data</code></li>
+</ul></li>
+<li>Create job:
+
+<ul>
+<li>Noun/Verb syntax: <code>aurora job create west/www-data/test/job job.aurora</code></li>
+<li>Old syntax: <code>aurora create west/www-data/test/job job.aurora</code></li>
+</ul></li>
+<li>Schedule a job to run at a specific interval:
+
+<ul>
+<li>Noun/verb: <code>aurora cron schedule east/www-data/test/job job.aurora</code></li>
+<li>Old: <code>aurora create east/www-data/test/job job.aurora</code></li>
+</ul></li>
+</ul>
+
+<p>As you can see in these examples, the new syntax is more consistent:
+you always specify the cluster where a command executes as part of an
+identifier, where in the old syntax, it was sometimes part of the
+jobkey and sometimes specified with a “–cluster” option.</p>
+
+<p>The new syntax is also more clear and explicit: even without knowing
+much about Aurora, it’s clear what objects each command is acting on,
+where in the old syntax, commands like “create” are unclear.</p>
+
+<h3 id="the-job-noun">The Job Noun</h3>
+
+<p>A job is a configured program ready to run in Aurora. A job is,
+conceptually, a task factory: when a job is submitted to the Aurora
+scheduler, it creates a collection of tasks. The job contains a
+complete description of everything it needs to create a collection of
+tasks. (Note that this subsumes “service” commands. A service is just
+a task whose configuration sets the is_service flag, so we don’t have
+separate commands for working with services.) Jobs are specified using
+<code>cluster/role/env/name</code> jobkey syntax.</p>
+
+<ul>
+<li><code>aurora job create *jobkey* *config*</code>: submits a job to a cluster, launching the task(s) specified by the job config.</li>
+<li><code>aurora job status *jobkey*</code>: query job status. Prints information about the job,
+whether it’s running, etc., to standard out. If jobkey includes
+globs, it should list all jobs that match the glob</li>
+<li><code>aurora job kill *jobkey*/*instanceids*</code>: kill/stop some of a jobs instances. This stops a job' tasks; if the job
+has service tasks, they’ll be disabled, so that they won’t restart.</li>
+<li><code>aurora job killall *jobkey*</code>: kill all of the instances of a job. This
+is distinct from the <em>kill</em> command as a safety measure: omitting the
+instances from a kill command shouldn’t result in destroying the entire job.</li>
+<li><code>aurora job restart *jobkey*</code>: conceptually, this will kill a job, and then
+launch it again. If the job does not exist, then fail with an error
+message. In fact, the underlying implementation does the
+kill/relaunch on a rolling basis - so it’s not an immediate kill of
+all shards/instances, followed by a delay as all instances relaunch,
+but rather a controlled gradual process.</li>
+<li><code>aurora job list *jobkey*</code>: list all jobs that match the jobkey spec that are
+registered with the scheduler. This will include both jobs that are
+currently running, and jobs that are scheduled to run at a later
+time. The job key can be partial: if it specifies cluster, all jobs
+on the cluster will be listed; cluster/role, all jobs running on the cluster under the role will be listed, etc.</li>
+</ul>
+
+<h2 id="the-schedule-noun-(cron)">The Schedule Noun (Cron)</h2>
+
+<p>Note (3/21/2014): The “cron” noun is <em>not</em> implemented yet.</p>
+
+<p>Cron is a scheduler adjunct that periodically runs a job on a
+schedule. The cron commands all manipulate cron schedule entries. The
+schedules are specified as a part of the job configuration.</p>
+
+<ul>
+<li><code>aurora cron schedule jobkey config</code>: schedule a job to run by cron. If a cron job already exists
+replaces its template with a new one.</li>
+<li><code>aurora cron deschedule jobkey</code>: removes a jobs entry from the cron schedule.</li>
+<li><code>aurora cron status jobkey</code>: query for a scheduled job’s status.</li>
+</ul>
+
+<h2 id="the-quota-noun">The Quota Noun</h2>
+
+<p>A quota is a data object maintained by the scheduler that specifies the maximum
+resources that may be consumed by jobs owned by a particular role. In the future,
+we may add new quota types. At some point, we’ll also probably add an administrators
+command to set quotas.</p>
+
+<ul>
+<li><code>aurora quota get *cluster/role*</code></li>
+</ul>
+
+<h2 id="implementation">Implementation</h2>
+
+<p>The current command line is monolithic. Every command on an Aurora
+object is a top-level command in the Aurora client. In the
+restructured command line, each of the primary object types
+manipulated by Aurora should have its own sub-command.</p>
+
+<ul>
+<li>Advantages of this approach:
+
+<ul>
+<li>Easier to detangle the command-line processing. The top-level
+command-processing will be a small set of subcommand
+processors. Option processing for each subcommand can be offloaded
+to a separate module.</li>
+<li>The aurora top-level help command will be much more
+comprehensible. Instead of giving a huge list of every possible
+command, it will present the list of top-level object types, and
+then users can request help on the commands for a specific type
+of object.</li>
+<li>The sub-commands can be separated into distinct command-line
+tools when appropriate.</li>
+</ul></li>
+</ul>
+
+<h3 id="command-structure-and-options-processing">Command Structure and Options Processing</h3>
+
+<p>The implementation will follow closely on Pants goals. Pants goals use
+a static registration system to add new subcommands. In pants, each
+goal command is an implementation of a command interface, and provides
+implementations of methods to register options and parameters, and to
+actually execute the command. In this design, commands are modular and
+easy to implement, debug, and combine in different ways.</p>
+
+<p>For the Aurora client, we plan to use a two-level variation of the
+basic concept from pants. At the top-level we will have nouns. A noun
+will define some common command-line parameters required by all of its
+verbs, and will provide a registration hook for attaching verbs. Nouns
+will be implemented as a subclass of a basic Noun type.</p>
+
+<p>Each verb will, similarly, be implemented as a subclass of Verb. Verbs
+will be able to specify command-line options and parameters.</p>
+
+<p>Both <code>Noun</code> and <code>Verb</code> will be subclasses of a common base-class <code>AuroraCommand</code>:</p>
+<pre class="highlight text">class AuroraCommand(object):
+ def get_options(self):
+ """Gets the set of command-line options objects for this command.
+ The result is a list of CommandOption objects.
+ """
+ pass
+
+ @property
+ def help(self):
+ """Returns the help message for this command"""
+
+ @property
+ def usage(self):
+ """Returns a short usage description of the command"""
+
+ @property
+ def name(self):
+ """Returns the command name"""
+</pre>
+<p>A command-line tool will be implemented as an instance of a <code>CommandLine</code>:</p>
+<pre class="highlight text">class CommandLine(object):
+ """The top-level object implementing a command-line application."""
+
+ @property
+ def name(self):
+ """Returns the name of this command-line tool"""
+
+ def print_out(self, str):
+ print(str)
+
+ def print_err(self, str):
+ print(str, file=sys.stderr)
+
+ def register_noun(self, noun):
+ """Adds a noun to the application"""
+
+ def register_plugin(self, plugin):
+ """Adds a configuration plugin to the system"""
+</pre>
+<p>Nouns are registered into a command-line using the <code>register_noun</code>
+method. They are weakly coupled to the application, making it easy to
+use a single noun in several different command-line tools. Nouns allow
+the registration of verbs using the <code>register_verb</code> method.</p>
+
+<p>When commands execute, they’re given an instance of a <em>context object</em>.
+The context object must be an instance of a subclass of <code>AuroraCommandContext</code>.
+Options, parameters, and IO are all accessed using the context object. The context
+is created dynamically by the noun object owning the verb being executed. Developers
+are strongly encouraged to implement custom contexts for their nouns, and move functionality
+shared by the noun’s verbs into the context object. The context interface is:</p>
+<pre class="highlight text">class Context(object):
+ class Error(Exception): pass
+
+ class ArgumentException(Error): pass
+
+ class CommandError(Error):
+
+ @classmethod
+ def exit(cls, code, msg):
+ """Exit the application with an error message"""
+ raise cls.CommandError(code, msg)
+
+ def print_out(self, msg, indent=0):
+ """Prints a message to standard out, with an indent"""
+
+ def print_err(self, msg, indent=0):
+ """Prints a message to standard err, with an indent"""
+</pre>
+<p>In addition to nouns and verbs, there’s one more kind of registerable
+component, called a <em>configuration plugin</em>. These objects add a set of
+command-line options that can be passed to <em>all</em> of the commands
+implemented in the tool. Before the command is executed, the
+configuration plugin will be invoked, and will process its
+command-line arguments. This is useful for general configuration
+changes, like establish a secure tunnel to talk to machines in a
+datacenter. (A useful way to think of a plugin is as something like an
+aspect that can be woven in to aurora to provide environment-specific
+configuration.) A configuration plugin is implemented as an instance
+of class <code>ConfigurationPlugin</code>, and registered with the
+<code>register_plugin</code> method of the <code>CommandLine</code> object. The interface of
+a plugin is:</p>
+<pre class="highlight text">class ConfigurationPlugin(object):
+ """A component that can be plugged in to a command-line."""
+
+ @abstractmethod
+ def get_options(self):
+ """Return the set of options processed by this plugin"""
+
+ @abstractmethod
+ def execute(self, context):
+ """Run the context/command line initialization code for this plugin."""
+</pre>
+<h3 id="command-execution">Command Execution</h3>
+
+<p>The options process and command execution is built as a facade over Python’s
+standard argparse. All of the actual argument processing is done by the
+argparse library.</p>
+
+<p>Once the options are processed, the framework will start to execute the command. Command execution consists of:</p>
+
+<h1 id="create-a-context-object.-the-framework-will-use-the-argparse-options-to-identify">Create a context object. The framework will use the argparse options to identify</h1>
+
+<p>which noun is being invoked, and will call that noun’s <code>create_context</code> method.
+ The argparse options object will be stored in the context.</p>
+
+<h1 id="execute-any-configuration-plugins.-before-any-command-is-invoked,-the-framework">Execute any configuration plugins. Before any command is invoked, the framework</h1>
+
+<p>will first iterate over all of the registered configuration plugins. For each
+ plugin, it will invoke the <code>execute</code> method.</p>
+
+<h1 id="the-noun-will-use-the-context-to-find-out-what-verb-is-being-invoked,-and-it-will">The noun will use the context to find out what verb is being invoked, and it will</h1>
+
+<p>then call that verb’s <code>execute</code> method.</p>
+
+<h1 id="the-command-will-exit.-its-return-code-will-be-whatever-was-returned-by-the-verb's">The command will exit. Its return code will be whatever was returned by the verb’s</h1>
+
+<p><code>execute</code> method.</p>
+
+<p>Commands are expected to return a code from a list of standard exit codes,
+which can be found in <code>src/main/python/apache/aurora/client/cli/__init__.py</code>.</p>
+
+ </div>
+ </div>
+
+ <div class="container-fluid section-footer buffer">
+ <div class="container">
+ <div class="row">
+ <div class="col-md-2 col-md-offset-1"><h3>Quick Links</h3>
+ <ul>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/community/">Mailing Lists</a></li>
+ <li><a href="http://issues.apache.org/jira/browse/AURORA">Issue Tracking</a></li>
+ <li><a href="/documentation/latest/contributing/">How To Contribute</a></li>
+ </ul>
+ </div>
+ <div class="col-md-2"><h3>The ASF</h3>
+ <ul>
+ <li><a href="http://www.apache.org/licenses/">License</a></li>
+ <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+ <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
+ <li><a href="http://www.apache.org/security/">Security</a></li>
+ </ul>
+ </div>
+ <div class="col-md-6">
+ <p class="disclaimer">Apache Aurora is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.</p>
+ <p class="disclaimer">Copyright 2014 <a href="http://www.apache.org/">Apache Software Foundation</a>. Licensed under the <a href="http://www.apache.org/licenses/">Apache License v2.0</a>. The <a href="https://www.flickr.com/photos/trondk/12706051375/">Aurora Borealis IX photo</a> displayed on the homepage is available under a <a href="https://creativecommons.org/licenses/by-nc-nd/2.0/">Creative Commons BY-NC-ND 2.0 license</a>. Apache, Apache Aurora, and the Apache feather logo are trademarks of The Apache Software Foundation.</p>
+ </div>
+ </div>
+ </div>
+ </body>
+</html>
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+<!DOCTYPE html>
+<html lang="en">
+ <head>
+ <meta charset="utf-8">
+ <meta name="viewport" content="width=device-width, initial-scale=1">
+ <title>Apache Aurora</title>
+ <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css">
+ <link href="/assets/css/main.css" rel="stylesheet">
+ <!-- Analytics -->
+ <script type="text/javascript">
+ var _gaq = _gaq || [];
+ _gaq.push(['_setAccount', 'UA-45879646-1']);
+ _gaq.push(['_setDomainName', 'apache.org']);
+ _gaq.push(['_trackPageview']);
+
+ (function() {
+ var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
+ ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
+ var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
+ })();
+ </script>
+ </head>
+ <body>
+
+ <div class="container-fluid section-header">
+ <div class="container">
+ <div class="nav nav-bar">
+ <a href="/"><img src="/assets/img/aurora_logo_white_bkg.svg" width="300" alt="Transparent Apache Aurora logo with dark background"/></a>
+ <ul class="nav navbar-nav navbar-right">
+ <li><a href="/documentation/latest/">Documentation</a></li>
+ <li><a href="/community/">Community</a></li>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/blog/">Blog</a></li>
+ </ul>
+ </div>
+ </div>
+</div>
+ <div class="container-fluid">
+ <div class="container content">
+ <h2 id="setting-up-your-email-account">Setting up your email account</h2>
+
+<p>Once your Apache ID has been set up you can configure your account and add ssh keys and setup an
+email forwarding address at</p>
+
+<p><a href="http://id.apache.org">http://id.apache.org</a></p>
+
+<p>Additional instructions for setting up your new committer email can be found at</p>
+
+<p><a href="http://www.apache.org/dev/user-email.html">http://www.apache.org/dev/user-email.html</a></p>
+
+<p>The recommended setup is to configure all services (mailing lists, JIRA, ReviewBoard) to send
+emails to your @apache.org email address.</p>
+
+<h2 id="creating-a-gpg-key-for-releases">Creating a gpg key for releases</h2>
+
+<p>In order to create a release candidate you will need a gpg key published to an external key server
+and that key will need to be added to our KEYS file as well.</p>
+
+<ol>
+<li><p>Create a key:</p>
+<pre class="highlight text"> gpg --gen-key
+</pre></li>
+<li><p>Add your gpg key to the Apache Aurora KEYS file:</p>
+<pre class="highlight text"> git clone https://git-wip-us.apache.org/repos/asf/incubator-aurora.git
+ (gpg --list-sigs <KEY ID> && gpg --armor --export <KEY ID>) >> KEYS
+ git add KEYS && git commit -m "Adding gpg key for <APACHE ID>"
+ ./rbt post -o -g
+</pre></li>
+<li><p>Publish the key to an external key server:</p>
+<pre class="highlight text"> gpg --keyserver pgp.mit.edu --send-keys <KEY ID>
+</pre></li>
+<li><p>Update the changes to the KEYS file to the Apache Aurora svn dist locations listed below:</p>
+<pre class="highlight text"> https://dist.apache.org/repos/dist/dev/incubator/aurora/KEYS
+ https://dist.apache.org/repos/dist/release/incubator/aurora/KEYS
+</pre></li>
+<li><p>Add your key to git config for use with the release scripts:</p>
+<pre class="highlight text"> git config --global user.signingkey <KEY ID>
+</pre></li>
+</ol>
+
+<h2 id="creating-a-release">Creating a release</h2>
+
+<p>The following will guide you through the steps to create a release candidate, vote, and finally an
+official Apache Aurora release. Before starting your gpg key should be in the KEYS file and you
+must have access to commit to the dist.a.o repositories.</p>
+
+<ol>
+<li><p>Ensure that all issues resolved for this release candidate are tagged with the correct Fix
+Version in Jira, the changelog script will use this to generate the CHANGELOG in step #2.</p></li>
+<li><p>Create a release candidate. This will automatically update the CHANGELOG and commit it, create a
+branch and update the current version within the trunk. To create a minor version update and publish
+it run</p>
+<pre class="highlight text"> ./build-support/release/release-candidate -l m -p
+</pre></li>
+<li><p>Update, if necessary, the draft email created from the <code>release-candidate</code> script in step #2 and
+send the [VOTE] email to the dev@ and private@ mailing lists. You can verify the release signature
+and checksums by running</p>
+<pre class="highlight text"> ./build-support/release/verify-release-candidate
+</pre></li>
+<li><p>Wait for the vote to complete. If the vote fails address any issues and go back to step #1 and
+run again, this time you will use the -r flag to increment the release candidate version. This will
+automatically clean up the release candidate rc0 branch and source distribution.</p>
+<pre class="highlight text"> ./build-support/release/release-candidate -l m -r 1 -p
+</pre></li>
+<li><p>Once the vote has successfully passed create the release</p>
+<pre class="highlight text"> ./build-support/release/release
+</pre></li>
+<li><p>Update the draft email created fom the <code>release</code> script in step #5 to include the Apache ID’s for
+all binding votes and send the [RESULT][VOTE] email to the dev@ and private@ mailing lists.</p></li>
+</ol>
+
+ </div>
+ </div>
+
+ <div class="container-fluid section-footer buffer">
+ <div class="container">
+ <div class="row">
+ <div class="col-md-2 col-md-offset-1"><h3>Quick Links</h3>
+ <ul>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/community/">Mailing Lists</a></li>
+ <li><a href="http://issues.apache.org/jira/browse/AURORA">Issue Tracking</a></li>
+ <li><a href="/documentation/latest/contributing/">How To Contribute</a></li>
+ </ul>
+ </div>
+ <div class="col-md-2"><h3>The ASF</h3>
+ <ul>
+ <li><a href="http://www.apache.org/licenses/">License</a></li>
+ <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+ <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
+ <li><a href="http://www.apache.org/security/">Security</a></li>
+ </ul>
+ </div>
+ <div class="col-md-6">
+ <p class="disclaimer">Apache Aurora is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.</p>
+ <p class="disclaimer">Copyright 2014 <a href="http://www.apache.org/">Apache Software Foundation</a>. Licensed under the <a href="http://www.apache.org/licenses/">Apache License v2.0</a>. The <a href="https://www.flickr.com/photos/trondk/12706051375/">Aurora Borealis IX photo</a> displayed on the homepage is available under a <a href="https://creativecommons.org/licenses/by-nc-nd/2.0/">Creative Commons BY-NC-ND 2.0 license</a>. Apache, Apache Aurora, and the Apache feather logo are trademarks of The Apache Software Foundation.</p>
+ </div>
+ </div>
+ </div>
+ </body>
+</html>
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+<!DOCTYPE html>
+<html lang="en">
+ <head>
+ <meta charset="utf-8">
+ <meta name="viewport" content="width=device-width, initial-scale=1">
+ <title>Apache Aurora</title>
+ <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css">
+ <link href="/assets/css/main.css" rel="stylesheet">
+ <!-- Analytics -->
+ <script type="text/javascript">
+ var _gaq = _gaq || [];
+ _gaq.push(['_setAccount', 'UA-45879646-1']);
+ _gaq.push(['_setDomainName', 'apache.org']);
+ _gaq.push(['_trackPageview']);
+
+ (function() {
+ var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
+ ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
+ var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
+ })();
+ </script>
+ </head>
+ <body>
+
+ <div class="container-fluid section-header">
+ <div class="container">
+ <div class="nav nav-bar">
+ <a href="/"><img src="/assets/img/aurora_logo_white_bkg.svg" width="300" alt="Transparent Apache Aurora logo with dark background"/></a>
+ <ul class="nav navbar-nav navbar-right">
+ <li><a href="/documentation/latest/">Documentation</a></li>
+ <li><a href="/community/">Community</a></li>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/blog/">Blog</a></li>
+ </ul>
+ </div>
+ </div>
+</div>
+ <div class="container-fluid">
+ <div class="container content">
+ <h1 id="aurora-+-thermos-configuration-reference">Aurora + Thermos Configuration Reference</h1>
+
+<ul>
+<li><a href="#aurora--thermos-configuration-reference">Aurora + Thermos Configuration Reference</a></li>
+<li><a href="#introduction">Introduction</a></li>
+<li><a href="#process-schema">Process Schema</a>
+
+<ul>
+<li><a href="#process-objects">Process Objects</a>
+
+<ul>
+<li><a href="#name">name</a></li>
+<li><a href="#cmdline">cmdline</a></li>
+<li><a href="#max_failures">max_failures</a></li>
+<li><a href="#daemon">daemon</a></li>
+<li><a href="#ephemeral">ephemeral</a></li>
+<li><a href="#min_duration">min_duration</a></li>
+<li><a href="#final">final</a></li>
+</ul></li>
+</ul></li>
+<li><a href="#task-schema">Task Schema</a>
+
+<ul>
+<li><a href="#task-object">Task Object</a>
+
+<ul>
+<li><a href="#name-1">name</a></li>
+<li><a href="#processes">processes</a></li>
+<li><a href="#constraints">constraints</a></li>
+<li><a href="#resources">resources</a></li>
+<li><a href="#max_failures-1">max_failures</a></li>
+<li><a href="#max_concurrency">max_concurrency</a></li>
+<li><a href="#finalization_wait">finalization_wait</a></li>
+</ul></li>
+<li><a href="#constraint-object">Constraint Object</a></li>
+<li><a href="#resource-object">Resource Object</a></li>
+</ul></li>
+<li><a href="#job-schema">Job Schema</a>
+
+<ul>
+<li><a href="#job-objects">Job Objects</a></li>
+<li><a href="#services">Services</a></li>
+<li><a href="#updateconfig-objects">UpdateConfig Objects</a></li>
+<li><a href="#healthcheckconfig-objects">HealthCheckConfig Objects</a></li>
+<li><a href="#announcer-objects">Announcer Objects</a></li>
+</ul></li>
+<li><a href="#specifying-scheduling-constraints">Specifying Scheduling Constraints</a></li>
+<li><a href="#template-namespaces">Template Namespaces</a>
+
+<ul>
+<li><a href="#mesos-namespace">mesos Namespace</a></li>
+<li><a href="#thermos-namespace">thermos Namespace</a></li>
+</ul></li>
+<li><a href="#basic-examples">Basic Examples</a>
+
+<ul>
+<li><a href="#hello_worldaurora">hello_world.aurora</a></li>
+<li><a href="#environment-tailoring">Environment Tailoring</a>
+
+<ul>
+<li><a href="#hello_world_productionizedaurora">hello<em>world</em>productionized.aurora</a></li>
+</ul></li>
+</ul></li>
+</ul>
+
+<h1 id="introduction">Introduction</h1>
+
+<p>Don’t know where to start? The Aurora configuration schema is very
+powerful, and configurations can become quite complex for advanced use
+cases.</p>
+
+<p>For examples of simple configurations to get something up and running
+quickly, check out the <a href="/documentation/latest/tutorial/">Tutorial</a>. When you feel comfortable with the basics, move
+on to the <a href="/documentation/latest/configuration-tutorial/">Configuration Tutorial</a> for more in-depth coverage of
+configuration design.</p>
+
+<p>For additional basic configuration examples, see <a href="#BasicExamples">the end of this document</a>.</p>
+
+<h1 id="process-schema">Process Schema</h1>
+
+<p>Process objects consist of required <code>name</code> and <code>cmdline</code> attributes. You can customize Process
+behavior with its optional attributes. Remember, Processes are handled by Thermos.</p>
+
+<h3 id="process-objects">Process Objects</h3>
+
+<table><thead>
+<tr>
+<th><strong>Attribute Name</strong></th>
+<th style="text-align: center"><strong>Type</strong></th>
+<th><strong>Description</strong></th>
+</tr>
+</thead><tbody>
+<tr>
+<td><strong>name</strong></td>
+<td style="text-align: center">String</td>
+<td>Process name (Required)</td>
+</tr>
+<tr>
+<td><strong>cmdline</strong></td>
+<td style="text-align: center">String</td>
+<td>Command line (Required)</td>
+</tr>
+<tr>
+<td><strong>max_failures</strong></td>
+<td style="text-align: center">Integer</td>
+<td>Maximum process failures (Default: 1)</td>
+</tr>
+<tr>
+<td><strong>daemon</strong></td>
+<td style="text-align: center">Boolean</td>
+<td>When True, this is a daemon process. (Default: False)</td>
+</tr>
+<tr>
+<td><strong>ephemeral</strong></td>
+<td style="text-align: center">Boolean</td>
+<td>When True, this is an ephemeral process. (Default: False)</td>
+</tr>
+<tr>
+<td><strong>min_duration</strong></td>
+<td style="text-align: center">Integer</td>
+<td>Minimum duration between process restarts in seconds. (Default: 15)</td>
+</tr>
+<tr>
+<td><strong>final</strong></td>
+<td style="text-align: center">Boolean</td>
+<td>When True, this process is a finalizing one that should run last. (Default: False)</td>
+</tr>
+</tbody></table>
+
+<h4 id="name">name</h4>
+
+<p>The name is any valid UNIX filename string (specifically no
+slashes, NULLs or leading periods). Within a Task object, each Process name
+must be unique.</p>
+
+<h4 id="cmdline">cmdline</h4>
+
+<p>The command line run by the process. The command line is invoked in a bash
+subshell, so can involve fully-blown bash scripts. However, nothing is
+supplied for command-line arguments so <code>$*</code> is unspecified.</p>
+
+<h4 id="max_failures">max_failures</h4>
+
+<p>The maximum number of failures (non-zero exit statuses) this process can
+have before being marked permanently failed and not retried. If a
+process permanently fails, Thermos looks at the failure limit of the task
+containing the process (usually 1) to determine if the task has
+failed as well.</p>
+
+<p>Setting <code>max_failures</code> to 0 makes the process retry
+indefinitely until it achieves a successful (zero) exit status.
+It retries at most once every <code>min_duration</code> seconds to prevent
+an effective denial of service attack on the coordinating Thermos scheduler.</p>
+
+<h4 id="daemon">daemon</h4>
+
+<p>By default, Thermos processes are non-daemon. If <code>daemon</code> is set to True, a
+successful (zero) exit status does not prevent future process runs.
+Instead, the process reinvokes after <code>min_duration</code> seconds.
+However, the maximum failure limit still applies. A combination of
+<code>daemon=True</code> and <code>max_failures=0</code> causes a process to retry
+indefinitely regardless of exit status. This should be avoided
+for very short-lived processes because of the accumulation of
+checkpointed state for each process run. When running in Mesos
+specifically, <code>max_failures</code> is capped at 100.</p>
+
+<h4 id="ephemeral">ephemeral</h4>
+
+<p>By default, Thermos processes are non-ephemeral. If <code>ephemeral</code> is set to
+True, the process' status is not used to determine if its containing task
+has completed. For example, consider a task with a non-ephemeral
+webserver process and an ephemeral logsaver process
+that periodically checkpoints its log files to a centralized data store.
+The task is considered finished once the webserver process has
+completed, regardless of the logsaver’s current status.</p>
+
+<h4 id="min_duration">min_duration</h4>
+
+<p>Processes may succeed or fail multiple times during a single task’s
+duration. Each of these is called a <em>process run</em>. <code>min_duration</code> is
+the minimum number of seconds the scheduler waits before running the
+same process.</p>
+
+<h4 id="final">final</h4>
+
+<p>Processes can be grouped into two classes: ordinary processes and
+finalizing processes. By default, Thermos processes are ordinary. They
+run as long as the task is considered healthy (i.e., no failure
+limits have been reached.) But once all regular Thermos processes
+finish or the task reaches a certain failure threshold, it
+moves into a “finalization” stage and runs all finalizing
+processes. These are typically processes necessary for cleaning up the
+task, such as log checkpointers, or perhaps e-mail notifications that
+the task completed.</p>
+
+<p>Finalizing processes may not depend upon ordinary processes or
+vice-versa, however finalizing processes may depend upon other
+finalizing processes and otherwise run as a typical process
+schedule.</p>
+
+<h1 id="task-schema">Task Schema</h1>
+
+<p>Tasks fundamentally consist of a <code>name</code> and a list of Process objects stored as the
+value of the <code>processes</code> attribute. Processes can be further constrained with
+<code>constraints</code>. By default, <code>name</code>’s value inherits from the first Process in the
+<code>processes</code> list, so for simple <code>Task</code> objects with one Process, <code>name</code>
+can be omitted. In Mesos, <code>resources</code> is also required.</p>
+
+<h3 id="task-object">Task Object</h3>
+
+<table><thead>
+<tr>
+<th><strong>param</strong></th>
+<th style="text-align: center"><strong>type</strong></th>
+<th><strong>description</strong></th>
+</tr>
+</thead><tbody>
+<tr>
+<td><code>name</code></td>
+<td style="text-align: center">String</td>
+<td>Process name (Required) (Default: <code>processes0.name</code>)</td>
+</tr>
+<tr>
+<td><code>processes</code></td>
+<td style="text-align: center">List of <code>Process</code> objects</td>
+<td>List of <code>Process</code> objects bound to this task. (Required)</td>
+</tr>
+<tr>
+<td><code>constraints</code></td>
+<td style="text-align: center">List of <code>Constraint</code> objects</td>
+<td>List of <code>Constraint</code> objects constraining processes.</td>
+</tr>
+<tr>
+<td><code>resources</code></td>
+<td style="text-align: center"><code>Resource</code> object</td>
+<td>Resource footprint. (Required)</td>
+</tr>
+<tr>
+<td><code>max_failures</code></td>
+<td style="text-align: center">Integer</td>
+<td>Maximum process failures before being considered failed (Default: 1)</td>
+</tr>
+<tr>
+<td><code>max_concurrency</code></td>
+<td style="text-align: center">Integer</td>
+<td>Maximum number of concurrent processes (Default: 0, unlimited concurrency.)</td>
+</tr>
+<tr>
+<td><code>finalization_wait</code></td>
+<td style="text-align: center">Integer</td>
+<td>Amount of time allocated for finalizing processes, in seconds. (Default: 30)</td>
+</tr>
+</tbody></table>
+
+<h4 id="name">name</h4>
+
+<p><code>name</code> is a string denoting the name of this task. It defaults to the name of the first Process in
+the list of Processes associated with the <code>processes</code> attribute.</p>
+
+<h4 id="processes">processes</h4>
+
+<p><code>processes</code> is an unordered list of <code>Process</code> objects. To constrain the order
+in which they run, use <code>constraints</code>.</p>
+
+<h5 id="constraints">constraints</h5>
+
+<p>A list of <code>Constraint</code> objects. Currently it supports only one type,
+the <code>order</code> constraint. <code>order</code> is a list of process names
+that should run in the order given. For example,</p>
+<pre class="highlight text"> process = Process(cmdline = "echo hello {{name}}")
+ task = Task(name = "echoes",
+ processes = [process(name = "jim"), process(name = "bob")],
+ constraints = [Constraint(order = ["jim", "bob"]))
+</pre>
+<p>Constraints can be supplied ad-hoc and in duplicate. Not all
+Processes need be constrained, however Tasks with cycles are
+rejected by the Thermos scheduler.</p>
+
+<p>Use the <code>order</code> function as shorthand to generate <code>Constraint</code> lists.
+The following:</p>
+<pre class="highlight text"> order(process1, process2)
+</pre>
+<p>is shorthand for</p>
+<pre class="highlight text"> [Constraint(order = [process1.name(), process2.name()])]
+</pre>
+<h4 id="resources">resources</h4>
+
+<p>Takes a <code>Resource</code> object, which specifies the amounts of CPU, memory, and disk space resources
+to allocate to the Task.</p>
+
+<h4 id="max_failures">max_failures</h4>
+
+<p><code>max_failures</code> is the number of times processes that are part of this
+Task can fail before the entire Task is marked for failure.</p>
+
+<p>For example:</p>
+<pre class="highlight text"> template = Process(max_failures=10)
+ task = Task(
+ name = "fail",
+ processes = [
+ template(name = "failing", cmdline = "exit 1"),
+ template(name = "succeeding", cmdline = "exit 0")
+ ],
+ max_failures=2)
+</pre>
+<p>The <code>failing</code> Process could fail 10 times before being marked as
+permanently failed, and the <code>succeeding</code> Process would succeed on the
+first run. The task would succeed despite only allowing for two failed
+processes. To be more specific, there would be 10 failed process runs
+yet 1 failed process.</p>
+
+<h4 id="max_concurrency">max_concurrency</h4>
+
+<p>For Tasks with a number of expensive but otherwise independent
+processes, you may want to limit the amount of concurrency
+the Thermos scheduler provides rather than artificially constraining
+it via <code>order</code> constraints. For example, a test framework may
+generate a task with 100 test run processes, but wants to run it on
+a machine with only 4 cores. You can limit the amount of parallelism to
+4 by setting <code>max_concurrency=4</code> in your task configuration.</p>
+
+<p>For example, the following task spawns 180 Processes (“mappers”)
+to compute individual elements of a 180 degree sine table, all dependent
+upon one final Process (“reducer”) to tabulate the results:</p>
+<pre class="highlight text">def make_mapper(id):
+ return Process(
+ name = "mapper%03d" % id,
+ cmdline = "echo 'scale=50;s(%d\*4\*a(1)/180)' | bc -l >
+ temp.sine_table.%03d" % (id, id))
+
+def make_reducer():
+ return Process(name = "reducer", cmdline = "cat temp.\* | nl \> sine\_table.txt
+ && rm -f temp.\*")
+
+processes = map(make_mapper, range(180))
+
+task = Task(
+ name = "mapreduce",
+ processes = processes + [make\_reducer()],
+ constraints = [Constraint(order = [mapper.name(), 'reducer']) for mapper
+ in processes],
+ max_concurrency = 8)
+</pre>
+<h4 id="finalization_wait">finalization_wait</h4>
+
+<p>Tasks have three active stages: <code>ACTIVE</code>, <code>CLEANING</code>, and <code>FINALIZING</code>. The
+<code>ACTIVE</code> stage is when ordinary processes run. This stage lasts as
+long as Processes are running and the Task is healthy. The moment either
+all Processes have finished successfully or the Task has reached a
+maximum Process failure limit, it goes into <code>CLEANING</code> stage and send
+SIGTERMs to all currently running Processes and their process trees.
+Once all Processes have terminated, the Task goes into <code>FINALIZING</code> stage
+and invokes the schedule of all Processes with the “final” attribute set to True.</p>
+
+<p>This whole process from the end of <code>ACTIVE</code> stage to the end of <code>FINALIZING</code>
+must happen within <code>finalization_wait</code> seconds. If it does not
+finish during that time, all remaining Processes are sent SIGKILLs
+(or if they depend upon uncompleted Processes, are
+never invoked.)</p>
+
+<p>Client applications with higher priority may force a shorter
+finalization wait (e.g. through parameters to <code>thermos kill</code>), so this
+is mostly a best-effort signal.</p>
+
+<h3 id="constraint-object">Constraint Object</h3>
+
+<p>Current constraint objects only support a single ordering constraint, <code>order</code>,
+which specifies its processes run sequentially in the order given. By
+default, all processes run in parallel when bound to a <code>Task</code> without
+ordering constraints.</p>
+
+<table><thead>
+<tr>
+<th>param</th>
+<th style="text-align: center">type</th>
+<th>description</th>
+</tr>
+</thead><tbody>
+<tr>
+<td>order</td>
+<td style="text-align: center">List of String</td>
+<td>List of processes by name (String) that should be run serially.</td>
+</tr>
+</tbody></table>
+
+<h3 id="resource-object">Resource Object</h3>
+
+<p>Specifies the amount of CPU, Ram, and disk resources the task needs. See the
+<a href="/documentation/latest/resource-isolation/">Resource Isolation document</a> for suggested values and to understand how
+resources are allocated.</p>
+
+<table><thead>
+<tr>
+<th>param</th>
+<th style="text-align: center">type</th>
+<th>description</th>
+</tr>
+</thead><tbody>
+<tr>
+<td><code>cpu</code></td>
+<td style="text-align: center">Float</td>
+<td>Fractional number of cores required by the task.</td>
+</tr>
+<tr>
+<td><code>ram</code></td>
+<td style="text-align: center">Integer</td>
+<td>Bytes of RAM required by the task.</td>
+</tr>
+<tr>
+<td><code>disk</code></td>
+<td style="text-align: center">Integer</td>
+<td>Bytes of disk required by the task.</td>
+</tr>
+</tbody></table>
+
+<h1 id="job-schema">Job Schema</h1>
+
+<h3 id="job-objects">Job Objects</h3>
+
+<table><thead>
+<tr>
+<th>name</th>
+<th style="text-align: center">type</th>
+<th>description</th>
+</tr>
+</thead><tbody>
+<tr>
+<td><code>task</code></td>
+<td style="text-align: center">Task</td>
+<td>The Task object to bind to this job. Required.</td>
+</tr>
+<tr>
+<td><code>name</code></td>
+<td style="text-align: center">String</td>
+<td>Job name. (Default: inherited from the task attribute’s name)</td>
+</tr>
+<tr>
+<td><code>role</code></td>
+<td style="text-align: center">String</td>
+<td>Job role account. Required.</td>
+</tr>
+<tr>
+<td><code>cluster</code></td>
+<td style="text-align: center">String</td>
+<td>Cluster in which this job is scheduled. Required.</td>
+</tr>
+<tr>
+<td><code>environment</code></td>
+<td style="text-align: center">String</td>
+<td>Job environment, default <code>devel</code>. Must be one of <code>prod</code>, <code>devel</code>, <code>test</code> or <code>staging<number></code>.</td>
+</tr>
+<tr>
+<td><code>contact</code></td>
+<td style="text-align: center">String</td>
+<td>Best email address to reach the owner of the job. For production jobs, this is usually a team mailing list.</td>
+</tr>
+<tr>
+<td><code>instances</code></td>
+<td style="text-align: center">Integer</td>
+<td>Number of instances (sometimes referred to as replicas or shards) of the task to create. (Default: 1)</td>
+</tr>
+<tr>
+<td><code>cron_schedule</code></td>
+<td style="text-align: center">String</td>
+<td>Cron schedule in cron format. May only be used with non-service jobs. See <a href="/documentation/latest/cron-jobs/">Cron Jobs</a> for more information. Default: None (not a cron job.)</td>
+</tr>
+<tr>
+<td><code>cron_collision_policy</code></td>
+<td style="text-align: center">String</td>
+<td>Policy to use when a cron job is triggered while a previous run is still active. KILL<em>EXISTING Kill the previous run, and schedule the new run CANCEL</em>NEW Let the previous run continue, and cancel the new run. (Default: KILL_EXISTING)</td>
+</tr>
+<tr>
+<td><code>update_config</code></td>
+<td style="text-align: center"><code>update_config</code> object</td>
+<td>Parameters for controlling the rate and policy of rolling updates.</td>
+</tr>
+<tr>
+<td><code>constraints</code></td>
+<td style="text-align: center">dict</td>
+<td>Scheduling constraints for the tasks. See the section on the <a href="#Specifying-Scheduling-Constraints">constraint specification language</a></td>
+</tr>
+<tr>
+<td><code>service</code></td>
+<td style="text-align: center">Boolean</td>
+<td>If True, restart tasks regardless of success or failure. (Default: False)</td>
+</tr>
+<tr>
+<td><code>max_task_failures</code></td>
+<td style="text-align: center">Integer</td>
+<td>Maximum number of failures after which the task is considered to have failed (Default: 1) Set to -1 to allow for infinite failures</td>
+</tr>
+<tr>
+<td><code>priority</code></td>
+<td style="text-align: center">Integer</td>
+<td>Preemption priority to give the task (Default 0). Tasks with higher priorities may preempt tasks at lower priorities.</td>
+</tr>
+<tr>
+<td><code>production</code></td>
+<td style="text-align: center">Boolean</td>
+<td>Whether or not this is a production task backed by quota (Default: False). Production jobs may preempt any non-production job, and may only be preempted by production jobs in the same role and of higher priority. To run jobs at this level, the job role must have the appropriate quota.</td>
+</tr>
+<tr>
+<td><code>health_check_config</code></td>
+<td style="text-align: center"><code>heath_check_config</code> object</td>
+<td>Parameters for controlling a task’s health checks via HTTP. Only used if a health port was assigned with a command line wildcard.</td>
+</tr>
+</tbody></table>
+
+<h3 id="services">Services</h3>
+
+<p>Jobs with the <code>service</code> flag set to True are called Services. The <code>Service</code>
+alias can be used as shorthand for <code>Job</code> with <code>service=True</code>.
+Services are differentiated from non-service Jobs in that tasks
+always restart on completion, whether successful or unsuccessful.
+Jobs without the service bit set only restart up to
+<code>max_task_failures</code> times and only if they terminated unsuccessfully
+either due to human error or machine failure.</p>
+
+<h3 id="updateconfig-objects">UpdateConfig Objects</h3>
+
+<p>Parameters for controlling the rate and policy of rolling updates.</p>
+
+<table><thead>
+<tr>
+<th>object</th>
+<th style="text-align: center">type</th>
+<th>description</th>
+</tr>
+</thead><tbody>
+<tr>
+<td><code>batch_size</code></td>
+<td style="text-align: center">Integer</td>
+<td>Maximum number of shards to be updated in one iteration (Default: 1)</td>
+</tr>
+<tr>
+<td><code>restart_threshold</code></td>
+<td style="text-align: center">Integer</td>
+<td>Maximum number of seconds before a shard must move into the <code>RUNNING</code> state before considered a failure (Default: 60)</td>
+</tr>
+<tr>
+<td><code>watch_secs</code></td>
+<td style="text-align: center">Integer</td>
+<td>Minimum number of seconds a shard must remain in <code>RUNNING</code> state before considered a success (Default: 45)</td>
+</tr>
+<tr>
+<td><code>max_per_shard_failures</code></td>
+<td style="text-align: center">Integer</td>
+<td>Maximum number of restarts per shard during update. Increments total failure count when this limit is exceeded. (Default: 0)</td>
+</tr>
+<tr>
+<td><code>max_total_failures</code></td>
+<td style="text-align: center">Integer</td>
+<td>Maximum number of shard failures to be tolerated in total during an update. Cannot be greater than or equal to the total number of tasks in a job. (Default: 0)</td>
+</tr>
+</tbody></table>
+
+<h3 id="healthcheckconfig-objects">HealthCheckConfig Objects</h3>
+
+<p>Parameters for controlling a task’s health checks via HTTP.</p>
+
+<table><thead>
+<tr>
+<th>object</th>
+<th style="text-align: center">type</th>
+<th>description</th>
+</tr>
+</thead><tbody>
+<tr>
+<td><code>initial_interval_secs</code></td>
+<td style="text-align: center">Integer</td>
+<td>Initial delay for performing an HTTP health check. (Default: 15)</td>
+</tr>
+<tr>
+<td><code>interval_secs</code></td>
+<td style="text-align: center">Integer</td>
+<td>Interval on which to check the task’s health via HTTP. (Default: 10)</td>
+</tr>
+<tr>
+<td><code>timeout_secs</code></td>
+<td style="text-align: center">Integer</td>
+<td>HTTP request timeout. (Default: 1)</td>
+</tr>
+<tr>
+<td><code>max_consecutive_failures</code></td>
+<td style="text-align: center">Integer</td>
+<td>Maximum number of consecutive failures that tolerated before considering a task unhealthy (Default: 0)</td>
+</tr>
+</tbody></table>
+
+<h3 id="announcer-objects">Announcer Objects</h3>
+
+<p>If the <code>announce</code> field in the Job configuration is set, each task will be
+registered in the ServerSet <code>/aurora/role/environment/jobname</code> in the
+zookeeper ensemble configured by the executor. If no Announcer object is specified,
+no announcement will take place. For more information about ServerSets, see the <a href="/documentation/latest/user-guide/">User Guide</a>.</p>
+
+<table><thead>
+<tr>
+<th>object</th>
+<th style="text-align: center">type</th>
+<th>description</th>
+</tr>
+</thead><tbody>
+<tr>
+<td><code>primary_port</code></td>
+<td style="text-align: center">String</td>
+<td>Which named port to register as the primary endpoint in the ServerSet (Default: <code>http</code>)</td>
+</tr>
+<tr>
+<td><code>portmap</code></td>
+<td style="text-align: center">dict</td>
+<td>A mapping of additional endpoints to announced in the ServerSet (Default: <code>{ 'aurora': '{{primary_port}}' }</code>)</td>
+</tr>
+</tbody></table>
+
+<h3 id="port-aliasing-with-the-announcer-portmap">Port aliasing with the Announcer <code>portmap</code></h3>
+
+<p>The primary endpoint registered in the ServerSet is the one allocated to the port
+specified by the <code>primary_port</code> in the <code>Announcer</code> object, by default
+the <code>http</code> port. This port can be referenced from anywhere within a configuration
+as <code>{{thermos.ports[http]}}</code>.</p>
+
+<p>Without the port map, each named port would be allocated a unique port number.
+The <code>portmap</code> allows two different named ports to be aliased together. The default
+<code>portmap</code> aliases the <code>aurora</code> port (i.e. <code>{{thermos.ports[aurora]}}</code>) to
+the <code>http</code> port. Even though the two ports can be referenced independently,
+only one port is allocated by Mesos. Any port referenced in a <code>Process</code> object
+but which is not in the portmap will be allocated dynamically by Mesos and announced as well.</p>
+
+<p>It is possible to use the portmap to alias names to static port numbers, e.g.
+<code>{'http': 80, 'https': 443, 'aurora': 'http'}</code>. In this case, referencing
+<code>{{thermos.ports[aurora]}}</code> would look up <code>{{thermos.ports[http]}}</code> then
+find a static port 80. No port would be requested of or allocated by Mesos.</p>
+
+<p>Static ports should be used cautiously as Aurora does nothing to prevent two
+tasks with the same static port allocations from being co-scheduled.
+External constraints such as slave attributes should be used to enforce such
+guarantees should they be needed.</p>
+
+<h1 id="specifying-scheduling-constraints">Specifying Scheduling Constraints</h1>
+
+<p>Most users will not need to specify constraints explicitly, as the
+scheduler automatically inserts reasonable defaults that attempt to
+ensure reliability without impacting schedulability. For example, the
+scheduler inserts a <code>host: limit:1</code> constraint, ensuring
+that your shards run on different physical machines. Please do not
+set this field unless you are sure of what you are doing.</p>
+
+<p>In the <code>Job</code> object there is a map <code>constraints</code> from String to String
+allowing the user to tailor the schedulability of tasks within the job.</p>
+
+<p>Each slave in the cluster is assigned a set of string-valued
+key/value pairs called attributes. For example, consider the host
+<code>cluster1-aaa-03-sr2</code> and its following attributes (given in key:value
+format): <code>host:cluster1-aaa-03-sr2</code> and <code>rack:aaa</code>.</p>
+
+<p>The constraint map’s key value is the attribute name in which we
+constrain Tasks within our Job. The value is how we constrain them.
+There are two types of constraints: <em>limit constraints</em> and <em>value
+constraints</em>.</p>
+
+<table><thead>
+<tr>
+<th>constraint</th>
+<th>description</th>
+</tr>
+</thead><tbody>
+<tr>
+<td>Limit</td>
+<td>A string that specifies a limit for a constraint. Starts with <code>'limit:</code> followed by an Integer and closing single quote, such as <code>'limit:1'</code>.</td>
+</tr>
+<tr>
+<td>Value</td>
+<td>A string that specifies a value for a constraint. To include a list of values, separate the values using commas. To negate the values of a constraint, start with a <code>!</code> <code>.</code></td>
+</tr>
+</tbody></table>
+
+<p>You can also control machine diversity using constraints. The below
+constraint ensures that no more than two instances of your job may run
+on a single host. Think of this as a “group by” limit.</p>
+<pre class="highlight text">constraints = {
+ 'host': 'limit:2',
+}
+</pre>
+<p>Likewise, you can use constraints to control rack diversity, e.g. at
+most one task per rack:</p>
+<pre class="highlight text">constraints = {
+ 'rack': 'limit:1',
+}
+</pre>
+<p>Use these constraints sparingly as they can dramatically reduce Tasks' schedulability.</p>
+
+<h1 id="template-namespaces">Template Namespaces</h1>
+
+<p>Currently, a few Pystachio namespaces have special semantics. Using them
+in your configuration allow you to tailor application behavior
+through environment introspection or interact in special ways with the
+Aurora client or Aurora-provided services.</p>
+
+<h3 id="mesos-namespace">mesos Namespace</h3>
+
+<p>The <code>mesos</code> namespace contains the <code>instance</code> variable that can be used
+to distinguish between Task replicas.</p>
+
+<table><thead>
+<tr>
+<th>variable name</th>
+<th style="text-align: center">type</th>
+<th>description</th>
+</tr>
+</thead><tbody>
+<tr>
+<td><code>instance</code></td>
+<td style="text-align: center">Integer</td>
+<td>The instance number of the created task. A job with 5 replicas has instance numbers 0, 1, 2, 3, and 4.</td>
+</tr>
+</tbody></table>
+
+<h3 id="thermos-namespace">thermos Namespace</h3>
+
+<p>The <code>thermos</code> namespace contains variables that work directly on the
+Thermos platform in addition to Aurora. This namespace is fully
+compatible with Tasks invoked via the <code>thermos</code> CLI.</p>
+
+<table><thead>
+<tr>
+<th style="text-align: center">variable</th>
+<th>type</th>
+<th>description</th>
+</tr>
+</thead><tbody>
+<tr>
+<td style="text-align: center"><code>ports</code></td>
+<td>map of string to Integer</td>
+<td>A map of names to port numbers</td>
+</tr>
+<tr>
+<td style="text-align: center"><code>task_id</code></td>
+<td>string</td>
+<td>The task ID assigned to this task.</td>
+</tr>
+</tbody></table>
+
+<p>The <code>thermos.ports</code> namespace is automatically populated by Aurora when
+invoking tasks on Mesos. When running the <code>thermos</code> command directly,
+these ports must be explicitly mapped with the <code>-P</code> option.</p>
+
+<p>For example, if ‘{{<code>thermos.ports[http]</code>}}’ is specified in a <code>Process</code>
+configuration, it is automatically extracted and auto-populated by
+Aurora, but must be specified with, for example, <code>thermos -P http:12345</code>
+to map <code>http</code> to port 12345 when running via the CLI.</p>
+
+<h1 id="basic-examples">Basic Examples</h1>
+
+<p>These are provided to give a basic understanding of simple Aurora jobs.</p>
+
+<h3 id="hello_world.aurora">hello_world.aurora</h3>
+
+<p>Put the following in a file named <code>hello_world.aurora</code>, substituting your own values
+for values such as <code>cluster</code>s.</p>
+<pre class="highlight text">import os
+hello_world_process = Process(name = 'hello_world', cmdline = 'echo hello world')
+
+hello_world_task = Task(
+ resources = Resources(cpu = 0.1, ram = 16 * MB, disk = 16 * MB),
+ processes = [hello_world_process])
+
+hello_world_job = Job(
+ cluster = 'cluster1',
+ role = os.getenv('USER'),
+ task = hello_world_task)
+
+jobs = [hello_world_job]
+</pre>
+<p>Then issue the following commands to create and kill the job, using your own values for the job key.</p>
+<pre class="highlight text">aurora create cluster1/$USER/test/hello_world hello_world.aurora
+
+aurora kill cluster1/$USER/test/hello_world
+</pre>
+<h3 id="environment-tailoring">Environment Tailoring</h3>
+
+<h4 id="helloworldproductionized.aurora">hello<em>world</em>productionized.aurora</h4>
+
+<p>Put the following in a file named <code>hello_world_productionized.aurora</code>, substituting your own values
+for values such as <code>cluster</code>s.</p>
+<pre class="highlight text">include('hello_world.aurora')
+
+production_resources = Resources(cpu = 1.0, ram = 512 * MB, disk = 2 * GB)
+staging_resources = Resources(cpu = 0.1, ram = 32 * MB, disk = 512 * MB)
+hello_world_template = hello_world(
+ name = "hello_world-{{cluster}}"
+ task = hello_world(resources=production_resources))
+
+jobs = [
+ # production jobs
+ hello_world_template(cluster = 'cluster1', instances = 25),
+ hello_world_template(cluster = 'cluster2', instances = 15),
+
+ # staging jobs
+ hello_world_template(
+ cluster = 'local',
+ instances = 1,
+ task = hello_world(resources=staging_resources)),
+]
+</pre>
+<p>Then issue the following commands to create and kill the job, using your own values for the job key</p>
+<pre class="highlight text">aurora create cluster1/$USER/test/hello_world-cluster1 hello_world_productionized.aurora
+
+aurora kill cluster1/$USER/test/hello_world-cluster1
+</pre>
+ </div>
+ </div>
+
+ <div class="container-fluid section-footer buffer">
+ <div class="container">
+ <div class="row">
+ <div class="col-md-2 col-md-offset-1"><h3>Quick Links</h3>
+ <ul>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/community/">Mailing Lists</a></li>
+ <li><a href="http://issues.apache.org/jira/browse/AURORA">Issue Tracking</a></li>
+ <li><a href="/documentation/latest/contributing/">How To Contribute</a></li>
+ </ul>
+ </div>
+ <div class="col-md-2"><h3>The ASF</h3>
+ <ul>
+ <li><a href="http://www.apache.org/licenses/">License</a></li>
+ <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+ <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
+ <li><a href="http://www.apache.org/security/">Security</a></li>
+ </ul>
+ </div>
+ <div class="col-md-6">
+ <p class="disclaimer">Apache Aurora is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.</p>
+ <p class="disclaimer">Copyright 2014 <a href="http://www.apache.org/">Apache Software Foundation</a>. Licensed under the <a href="http://www.apache.org/licenses/">Apache License v2.0</a>. The <a href="https://www.flickr.com/photos/trondk/12706051375/">Aurora Borealis IX photo</a> displayed on the homepage is available under a <a href="https://creativecommons.org/licenses/by-nc-nd/2.0/">Creative Commons BY-NC-ND 2.0 license</a>. Apache, Apache Aurora, and the Apache feather logo are trademarks of The Apache Software Foundation.</p>
+ </div>
+ </div>
+ </div>
+ </body>
+</html>
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[04/18] incubator-aurora-website git commit: Initial move of website
over to git
Posted by jf...@apache.org.
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/source/blog.html.erb
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diff --git a/source/blog.html.erb b/source/blog.html.erb
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+---
+title: Apache Aurora | Blog
+breadcrumb: Blog
+---
+<div class="row-fluid">
+ <div class="col-md-3">
+ <h4>Apache Aurora Blog</h4>
+ <p>The Aurora blog is a place for release announcements and for project committers to highlight features of the software.</p>
+ </div>
+ <div class="col-md-9">
+ <% blog.articles.each do |post| %>
+ <article>
+ <h2><%= link_to(post.title, post.url)%></h2>
+ <p><em>Posted by <%= post.data.post_author.display_name %>, <%= post.date.strftime("%B %e, %Y") %></em></p>
+ </article>
+ <% end %>
+ </div>
+</div>
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/source/blog/2014-12-08-aurora-0-6-0-incubating-released.md
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diff --git a/source/blog/2014-12-08-aurora-0-6-0-incubating-released.md b/source/blog/2014-12-08-aurora-0-6-0-incubating-released.md
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+---
+layout: post
+title: Aurora 0.6.0-incubating Released
+permalink: /blog/aurora-0-6-0-incubating-released/
+published: true
+post_author:
+ display_name: Bill Farner
+ twitter: wfarner
+tags: Release
+---
+
+The latest Apache Aurora release, 0.6.0-incubating, is now available for download. This version marks the second Aurora release since becoming part of the [Apache Incubator](http://incubator.apache.org), and includes the following features and improvements:
+
+ * Introduced highly-available, scheduler-driven job updates in beta ([AURORA-610](https://issues.apache.org/jira/browse/AURORA-610))
+ * Improvements to the Aurora web UI, including visualization of job updates
+ * Added automatic service registration in ZooKeeper ([AURORA-587](https://issues.apache.org/jira/browse/AURORA-587))
+ * Updates to Aurora client version two, deprecation of v1 coming in future release
+ * Lots of new [documentation](http://aurora.incubator.apache.org/documentation/latest/). Documentation now includes pages for [deploying the Aurora scheduler](http://aurora.incubator.apache.org/documentation/latest/deploying-aurora-scheduler/), [cron jobs](http://aurora.incubator.apache.org/documentation/latest/cron-jobs/), [SLA measurement](http://aurora.incubator.apache.org/documentation/latest/sla/), [storage](http://aurora.incubator.apache.org/documentation/latest/storage/), and [storage configuration and measurement](http://aurora.incubator.apache.org/documentation/latest/storage-config/).
+
+Full release notes are available in the release [CHANGELOG](https://git-wip-us.apache.org/repos/asf?p=incubator-aurora.git&f=CHANGELOG&hb=0.6.0-rc2).
+
+## Highly-available, scheduler-driven updates
+Rolling updates of services is a crucial feature in Aurora. As such, we
+want to take great care when changing its behavior. Previously, Aurora operated
+by delegating this functionality to the client (or any API client, for that
+matter). In this version, the scheduler can take over the
+responsibility of application update orchestration. Further details were discussed on the [Aurora mailing list](http://mail-archives.apache.org/mod_mbox/incubator-aurora-dev/201407.mbox/%3CCAGRA8uMxwVDokp_iHXhNru2gd-x_nM%2BDYAurpfAO6wuX7%3DnHFw%40mail.gmail.com%3E).
+
+## Aurora Web UI Improvements
+Since the scheduler can now orchestrate job updates, it has awareness of the progress and outcome of updates. This means you can see a progress bar for in-flight updates, and the history of updates for your jobs. Additionally, the performance of the UI was improved, especially for large roles and jobs [AURORA-458](https://issues.apache.org/jira/browse/AURORA-458).
+
+## Service Announcement and Management
+Job configurations can now supply an [`announce` parameter](http://aurora.incubator.apache.org/documentation/latest/configuration-reference/#announcer-objects), which is meant to be a way to opt-in for registration in a service discovery system. This has been implemented in the Aurora executor, and will automatically announce tasks via ZooKeeper.
+
+## Aurora Client Improvements
+Progress was made in features to [v2](http://aurora.incubator.apache.org/documentation/latest/clientv2/) of the [Aurora client](http://aurora.incubator.apache.org/documentation/latest/client-commands/). We will support version 1 and version 2 for 0.6.0, with version 1 to be removed in 0.7.0.
+
+## Improved Project Documentation
+New documentation pages including:
+
+ * [Deploying the Aurora scheduler](http://aurora.incubator.apache.org/documentation/latest/deploying-aurora-scheduler/)
+ * [Cron jobs](http://aurora.incubator.apache.org/documentation/latest/cron-jobs/)
+ * [SLA measurement](http://aurora.incubator.apache.org/documentation/latest/sla/)
+ * [Storage](http://aurora.incubator.apache.org/documentation/latest/storage/)
+ * [Storage configuration and measurement](http://aurora.incubator.apache.org/documentation/latest/storage-config/)
+ * [Monitoring](http://aurora.incubator.apache.org/documentation/latest/monitoring/)
+
+## Getting Involved
+We encourage you to try out this release and let us know what you think. If you run into any issues, please let us know on the [user mailing list and IRC](https://aurora.apache.org/community). The community also holds weekly IRC meetings at 11AM Pacific every Monday that you are welcome to join.
+
+## Thanks
+Thanks to the 16 contributors who made 0.6.0-incubating possible:
+
+Bill Farner, Maxim Khutornenko, Kevin Sweeney, Mark Chu-Carroll, Joshua Cohen, Zameer Manji, David McLaughlin, Brian Wickman, Joe Smith, Jake Farrell, Matthew Jeffryes, Dominic Hamon, Bjoern Metzdorf, Joseph Glanville, David Robinson, David Pan.
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/source/blog/feed.xml.erb
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diff --git a/source/blog/feed.xml.erb b/source/blog/feed.xml.erb
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+<% coder = HTMLEntities.new %>
+
+<feed xmlns="http://www.w3.org/2005/Atom">
+ <title>Apache Aurora Blog</title>
+ <id>http://aurora.incubator.apache.org/blog</id>
+ <link href="http://aurora.incubator.apache.org/blog" />
+ <link href="http://aurora.incubator.apache.org/blog/feed.xml" rel="self"/>
+ <updated><%= blog.articles.first.date.to_time.iso8601 %></updated>
+ <% blog.articles.each do |article| %>
+ <entry>
+ <id>http://aurora.incubator.apache.org<%= article.url %></id>
+ <link href="<%= article.url %>" />
+ <title>
+ <%= article.title %>
+ </title>
+ <updated><%= article.date.to_time.iso8601 %></updated>
+ <author>
+ <name><%= article.data.post_author.display_name %></name>
+ </author>
+ <content type="html">
+ <%= coder.encode(article.body) %>
+ </content>
+ </entry>
+ <% end %>
+</feed>
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/source/community.html.md
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+# Community
+
+<div class="row-fluid">
+ <div class="col-md-4">
+ <h3>Contributing to Aurora</h3>
+ <h4 name="reportbugs">Report or track a bug</h4>
+ <p>Bugs can be reported on our <a href="http://issues.apache.org/jira/browse/AURORA">JIRA issue tracker</a>. In order to create a new issue, you'll need register for an account.</p>
+
+ <h4 name="contribute">Submit a core patch</h4>
+ <p>Please follow our <a href="/docs/howtocontribute/">contribution guidelines</a> when submitting a patch. We welcome them!</p>
+ </div>
+ <div class="col-md-4">
+ <h3>Stay in Touch</h3>
+ <h4>Mailing lists</h4>
+ <p><strong>Developers</strong> - <a href="mailto:dev-subscribe@aurora.incubator.apache.org">Subscribe</a> | <a href="mailto:dev-unsubscribe@aurora.incubator.apache.org">Unsubscribe</a> | <a href="http://mail-archives.apache.org/mod_mbox/incubator-aurora-dev/">Archive</a><br />
+
+ <strong>Issues</strong> - <a href="mailto:issues-subscribe@aurora.incubator.apache.org">Subscribe</a> | <a href="mailto:issues-unsubscribe@aurora.incubator.apache.org">Unsubscribe</a> | <a href="http://mail-archives.apache.org/mod_mbox/incubator-aurora-issues/">Archive</a><br />
+
+ <strong>Commits</strong> - <a href="mailto:commits-subscribe@aurora.incubator.apache.org">Subscribe</a> | <a href="mailto:commits-unsubscribe@aurora.incubator.apache.org">Unsubscribe</a> | <a href="http://mail-archives.apache.org/mod_mbox/incubator-aurora-commits/">Archive</a><br />
+
+ <strong>Reviews</strong> - <a href="mailto:reviews-subscribe@aurora.incubator.apache.org">Subscribe</a> | <a href="mailto:reviews-unsubscribe@aurora.incubator.apache.org">Unsubscribe</a> | <a href="http://mail-archives.apache.org/mod_mbox/incubator-aurora-reviews/">Archive</a></p>
+
+ <h4 name="ircchannel">IRC</h4>
+ <p>Developers and users hang out in <code>#aurora</code> on <code>irc.freenode.net</code>. If you're new to IRC, we suggest trying a <a href="http://webchat.freenode.net/?channels=#aurora">web-based client</a>.</p>
+
+ <h4>Join our weekly IRC meetings</h4>
+ <p>We hold weekly IRC meetings as an opportunity for users and developers to engage. Meetings are every Monday at <a href="http://www.timeanddate.com/worldclock/fixedtime.html?msg=Aurora+Weekly+Meeting&iso=20140421T11&p1=224&ah=1">11AM Pacific Time</a>.</p>
+ </div>
+ <div class="col-md-4">
+ <h3>Follow the Project</h3>
+ <a class="twitter-timeline" href="https://twitter.com/ApacheAurora" data-widget-id="512693636127920129">Tweets by @ApacheMesos</a>
+ <script>!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0],p=/^http:/.test(d.location)?'http':'https';if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src=p+"://platform.twitter.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs");</script>
+ </div>
+</div>
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/source/developers.html.md
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+# Developers
+<div class="row-fluid">
+ <h4 name="reportbugs">Report or track a bug</h4>
+ <p>New bugs can be reported on our <a href="http://issues.apache.org/jira/browse/AURORA">Jira issue tracker</a>. In order to create a new issue, you'll need to signup for an account.</p>
+
+ <h4 name="contribute">Contribute a core patch</h4>
+ <p>Follow our <a href="/docs/howtocontribute/">contribution guidelines</a> when submitting a patch.</p>
+
+ <h4 name="ircchannel">IRC Channel</h4>
+ <p>Many of the Aurora developers and users chat in the #aurora channel on irc.freenode.net.</p>
+
+ <p>If you are new to IRC, you can use a <a href="http://webchat.freenode.net/?channels=#aurora">web-based client</a>.</p>
+</div>
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/source/docs/gettingstarted.html.md
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+# Getting Started
+
+The Aurora 'Getting Started' guide is [currently available on github](https://github.com/apache/incubator-aurora/blob/master/README.md) while the project moves its documentation to the Apache Software Foundation.
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/source/docs/howtocontribute.html.md
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+How To Contribute
+=================
+
+Getting your ReviewBoard Account
+--------------------------------
+Go to https://reviews.apache.org and create an account.
+
+Setting up your ReviewBoard Environment
+---------------------------------------
+Run `./rbt status`. The first time this runs it will bootstrap and you will be asked to login.
+Subsequent runs will cache your login credentials.
+
+Submitting a Patch for Review
+-----------------------------
+Post a review with `rbt`, fill out the fields in your browser and hit Publish.
+
+ ./rbt post -o -g
+
+Updating an Existing Review
+---------------------------
+Incorporate review feedback, make some more commits, update your existing review, fill out the
+fields in your browser and hit Publish.
+
+ ./rbt post -o -r <RB_ID>
+
+Merging Your Own Review (Committers)
+------------------------------------
+Once you have shipits from the right committers, merge your changes in a single commit and mark
+the review as submitted. The typical workflow is:
+
+ git checkout master
+ git pull origin master
+ ./rbt patch -c <RB_ID> # Verify the automatically-generated commit message looks sane,
+ # editing if necessary.
+ git show master # Verify everything looks sane
+ git push origin master
+ ./rbt close <RB_ID>
+
+Note that even if you're developing using feature branches you will not use `git merge` - each
+commit will be an atomic change accompanied by a ReviewBoard entry.
+
+Merging Someone Else's Review
+-----------------------------
+Sometimes you'll need to merge someone else's RB. The typical workflow for this is
+
+ git checkout master
+ git pull origin master
+ ./rbt patch -c <RB_ID>
+ git show master # Verify everything looks sane, author is correct
+ git push origin master
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+# Documentation
+
+## Introduction
+Apache Aurora is a service scheduler that runs on top of Apache Mesos, enabling you to run long-running services that take advantage of Apache Mesos' scalability, fault-tolerance, and resource isolation. This documentation has been organized into sections with three audiences in mind:
+
+ * Users: General information about the project and to learn how to run an Aurora job.
+ * Operators: For those that wish to manage and fine-tune an Aurora cluster.
+ * Developers: All the information you need to start modifying Aurora and contributing back to the project.
+
+This documentation is a work in progress, and we encourage you to ask questions on the [Aurora developer list](http://aurora.incubator.apache.org/community/) or the `#aurora` IRC channel on `irc.freenode.net`.
+
+## Users
+ * [Install Aurora on virtual machines on your private machine](/documentation/latest/vagrant/)
+ * [Hello World Tutorial](/documentation/latest/tutorial/)
+ * [User Guide](/documentation/latest/user-guide/)
+ * [Configuration Tutorial](/documentation/latest/configuration-tutorial/)
+ * [Aurora + Thermos Reference](/documentation/latest/configuration-reference/)
+ * [Command Line Client](/documentation/latest/client-commands/)
+ * [Aurora Client v2](/documentation/latest/clientv2/)
+ * [Cron Jobs](/documentation/latest/cron-jobs/)
+
+## Operators
+ * [Deploy Aurora](/documentation/latest/deploying-aurora-scheduler/)
+ * [Monitoring](/documentation/latest/monitoring/)
+ * [Hooks for Aurora Client API](/documentation/latest/hooks/)
+ * [Scheduler Storage](/documentation/latest/storage/)
+ * [Scheduler Storage and Maintenance](/documentation/latest/storage-config/)
+ * [SLA Measurement](/documentation/latest/sla/)
+ * [Resource Isolation and Sizing](/documentation/latest/resource-isolation/)
+ * [Generating test resources](/documentation/latest/test-resource-generation/)
+
+## Developers
+ * [Contributing to the project](/documentation/latest/contributing/)
+ * [Developing the Aurora Scheduler](/documentation/latest/developing-aurora-scheduler/)
+ * [Developing the Aurora Client](/documentation/latest/developing-aurora-client/)
+ * [Committers Guide](/documentation/latest/committers/)
\ No newline at end of file
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+# Client Cluster Configuration
+
+A cluster configuration file is used by the Aurora client to describe the Aurora clusters with
+which it can communicate. Ultimately this allows client users to reference clusters with short names
+like us-east and eu. The following properties may be set:
+
+ **Property** | **Type** | **Description**
+ :------------------------| :------- | :--------------
+ **name** | String | Cluster name (Required)
+ **slave_root** | String | Path to mesos slave work dir (Required)
+ **slave_run_directory** | String | Name of mesos slave run dir (Required)
+ **zk** | String | Hostname of ZooKeeper instance used to resolve Aurora schedulers.
+ **zk_port** | Integer | Port of ZooKeeper instance used to locate Aurora schedulers (Default: 2181)
+ **scheduler_zk_path** | String | ZooKeeper path under which scheduler instances are registered.
+ **scheduler_uri** | String | URI of Aurora scheduler instance.
+ **proxy_url** | String | Used by the client to format URLs for display.
+ **auth_mechanism** | String | The authentication mechanism to use when communicating with the scheduler. (Default: UNAUTHENTICATED)
+
+#### name
+
+The name of the Aurora cluster represented by this entry. This name will be the `cluster` portion of
+any job keys identifying jobs running within the cluster.
+
+#### slave_root
+
+The path on the mesos slaves where executing tasks can be found. It is used in combination with the
+`slave_run_directory` property by `aurora task run` and `aurora task ssh` to change into the sandbox
+directory after connecting to the host. This value should match the value passed to `mesos-slave`
+as `-work_dir`.
+
+#### slave_run_directory
+
+The name of the directory where the task run can be found. This is used in combination with the
+`slave_root` property by `aurora task run` and `aurora task ssh` to change into the sandbox
+directory after connecting to the host. This should almost always be set to `latest`.
+
+#### zk
+
+The hostname of the ZooKeeper instance used to resolve the Aurora scheduler. Aurora uses ZooKeeper
+to elect a leader. The client will connect to this ZooKeeper instance to determine the current
+leader. This host should match the host passed to the scheduler as `-zk_endpoints`.
+
+#### zk_port
+
+The port on which the ZooKeeper instance is running. If not set this will default to the standard
+ZooKeeper port of 2181. This port should match the port in the host passed to the scheduler as
+`-zk_endpoints`.
+
+#### scheduler_zk_path
+
+The path on the ZooKeeper instance under which the Aurora serverset is registered. This value should
+match the value passed to the scheduler as `-serverset_path`.
+
+#### scheduler_uri
+
+The URI of the scheduler. This would be used in place of the ZooKeeper related configuration above
+in circumstances where direct communication with a single scheduler is needed (e.g. testing
+environments). It is strongly advised to **never** use this property for production deploys.
+
+#### proxy_url
+
+Instead of using the hostname of the leading scheduler as the base url, if `proxy_url` is set, its
+value will be used instead. In that scenario the value for `proxy_url` would be, for example, the
+URL of your VIP in a loadbalancer or a roundrobin DNS name.
+
+#### auth_mechanism
+
+The identifier of an authentication mechanism that the client should use when communicating with the
+scheduler. Support for values other than `UNAUTHENTICATED` is currently not available, however work
+is [in progress](https://issues.apache.org/jira/browse/AURORA-720) to add federated authentication
+to Aurora which will allow for more robust configuration of client/scheduler authentication.
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/source/documentation/latest/client-commands.md
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+Aurora Client Commands
+======================
+
+The most up-to-date reference is in the client itself: use the
+`aurora help` subcommand (for example, `aurora help` or
+`aurora help create`) to find the latest information on parameters and
+functionality. Note that `aurora help open` does not work, due to underlying issues with
+reflection.
+
+- [Introduction](#introduction)
+- [Cluster Configuration](#cluster-configuration)
+- [Job Keys](#job-keys)
+- [Modifying Aurora Client Commands](#modifying-aurora-client-commands)
+- [Regular Jobs](#regular-jobs)
+ - [Creating and Running a Job](#creating-and-running-a-job)
+ - [Running a Command On a Running Job](#running-a-command-on-a-running-job)
+ - [Killing a Job](#killing-a-job)
+ - [Updating a Job](#updating-a-job)
+ - [Asynchronous job updates (beta)](#user-content-asynchronous-job-updates-beta)
+ - [Renaming a Job](#renaming-a-job)
+ - [Restarting Jobs](#restarting-jobs)
+- [Cron Jobs](#cron-jobs)
+- [Comparing Jobs](#comparing-jobs)
+- [Viewing/Examining Jobs](#viewingexamining-jobs)
+ - [Listing Jobs](#listing-jobs)
+ - [Inspecting a Job](#inspecting-a-job)
+ - [Versions](#versions)
+ - [Checking Your Quota](#checking-your-quota)
+ - [Finding a Job on Web UI](#finding-a-job-on-web-ui)
+ - [Getting Job Status](#getting-job-status)
+ - [Opening the Web UI](#opening-the-web-ui)
+ - [SSHing to a Specific Task Machine](#sshing-to-a-specific-task-machine)
+ - [Templating Command Arguments](#templating-command-arguments)
+
+Introduction
+------------
+
+Once you have written an `.aurora` configuration file that describes
+your Job and its parameters and functionality, you interact with Aurora
+using Aurora Client commands. This document describes all of these commands
+and how and when to use them. All Aurora Client commands start with
+`aurora`, followed by the name of the specific command and its
+arguments.
+
+*Job keys* are a very common argument to Aurora commands, as well as the
+gateway to useful information about a Job. Before using Aurora, you
+should read the next section which describes them in detail. The section
+after that briefly describes how you can modify the behavior of certain
+Aurora Client commands, linking to a detailed document about how to do
+that.
+
+This is followed by the Regular Jobs section, which describes the basic
+Client commands for creating, running, and manipulating Aurora Jobs.
+After that are sections on Comparing Jobs and Viewing/Examining Jobs. In
+other words, various commands for getting information and metadata about
+Aurora Jobs.
+
+Cluster Configuration
+---------------------
+
+The client must be able to find a configuration file that specifies available clusters. This file
+declares shorthand names for clusters, which are in turn referenced by job configuration files
+and client commands.
+
+The client will load at most two configuration files, making both of their defined clusters
+available. The first is intended to be a system-installed cluster, using the path specified in
+the environment variable `AURORA_CONFIG_ROOT`, defaulting to `/etc/aurora/clusters.json` if the
+environment variable is not set. The second is a user-installed file, located at
+`~/.aurora/clusters.json`.
+
+A cluster configuration is formatted as JSON. The simplest cluster configuration is one that
+communicates with a single (non-leader-elected) scheduler. For example:
+
+```javascript
+[{
+ "name": "example",
+ "scheduler_uri": "localhost:55555",
+}]
+```
+
+A configuration for a leader-elected scheduler would contain something like:
+
+```javascript
+[{
+ "name": "example",
+ "zk": "192.168.33.7",
+ "scheduler_zk_path": "/aurora/scheduler"
+}]
+```
+
+For more details on cluster configuration see the
+[Client Cluster Configuration](/documentation/latest/client-cluster-configuration/) documentation.
+
+Job Keys
+--------
+
+A job key is a unique system-wide identifier for an Aurora-managed
+Job, for example `cluster1/web-team/test/experiment204`. It is a 4-tuple
+consisting of, in order, *cluster*, *role*, *environment*, and
+*jobname*, separated by /s. Cluster is the name of an Aurora
+cluster. Role is the Unix service account under which the Job
+runs. Environment is a namespace component like `devel`, `test`,
+`prod`, or `stagingN.` Jobname is the Job's name.
+
+The combination of all four values uniquely specifies the Job. If any
+one value is different from that of another job key, the two job keys
+refer to different Jobs. For example, job key
+`cluster1/tyg/prod/workhorse` is different from
+`cluster1/tyg/prod/workcamel` is different from
+`cluster2/tyg/prod/workhorse` is different from
+`cluster2/foo/prod/workhorse` is different from
+`cluster1/tyg/test/workhorse.`
+
+Role names are user accounts existing on the slave machines. If you don't know what accounts
+are available, contact your sysadmin.
+
+Environment names are namespaces; you can count on `prod`, `devel` and `test` existing.
+
+Modifying Aurora Client Commands
+--------------------------------
+
+For certain Aurora Client commands, you can define hook methods that run
+either before or after an action that takes place during the command's
+execution, as well as based on whether the action finished successfully or failed
+during execution. Basically, a hook is code that lets you extend the
+command's actions. The hook executes on the client side, specifically on
+the machine executing Aurora commands.
+
+Hooks can be associated with these Aurora Client commands.
+
+ - `cancel_update`
+ - `create`
+ - `kill`
+ - `restart`
+ - `update`
+
+The process for writing and activating them is complex enough
+that we explain it in a devoted document, [Hooks for Aurora Client API](/documentation/latest/hooks/).
+
+Regular Jobs
+------------
+
+This section covers Aurora commands related to running, killing,
+renaming, updating, and restarting a basic Aurora Job.
+
+### Creating and Running a Job
+
+ aurora create <job key> <configuration file>
+
+Creates and then runs a Job with the specified job key based on a `.aurora` configuration file.
+The configuration file may also contain and activate hook definitions.
+
+`create` can take four named parameters:
+
+- `-E NAME=VALUE` Bind a Thermos mustache variable name to a
+ value. Multiple flags specify multiple values. Defaults to `[]`.
+- ` -o, --open_browser` Open a browser window to the scheduler UI Job
+ page after a job changing operation happens. When `False`, the Job
+ URL prints on the console and the user has to copy/paste it
+ manually. Defaults to `False`. Does not work when running in Vagrant.
+- ` -j, --json` If specified, configuration argument is read as a
+ string in JSON format. Defaults to False.
+- ` --wait_until=STATE` Block the client until all the Tasks have
+ transitioned into the requested state. Possible values are: `PENDING`,
+ `RUNNING`, `FINISHED`. Default: `PENDING`
+
+### Running a Command On a Running Job
+
+ aurora run <job_key> <cmd>
+
+Runs a shell command on all machines currently hosting shards of a
+single Job.
+
+`run` supports the same command line wildcards used to populate a Job's
+commands; i.e. anything in the `{{mesos.*}}` and `{{thermos.*}}`
+namespaces.
+
+`run` can take three named parameters:
+
+- `-t NUM_THREADS`, `--threads=NUM_THREADS `The number of threads to
+ use, defaulting to `1`.
+- `--user=SSH_USER` ssh as this user instead of the given role value.
+ Defaults to None.
+- `-e, --executor_sandbox` Run the command in the executor sandbox
+ instead of the Task sandbox. Defaults to False.
+
+### Killing a Job
+
+ aurora kill <job key> <configuration file>
+
+Kills all Tasks associated with the specified Job, blocking until all
+are terminated. Defaults to killing all shards in the Job.
+
+The `<configuration file>` argument for `kill` is optional. Use it only
+if it contains hook definitions and activations that affect the
+kill command.
+
+`kill` can take two named parameters:
+
+- `-o, --open_browser` Open a browser window to the scheduler UI Job
+ page after a job changing operation happens. When `False`, the Job
+ URL prints on the console and the user has to copy/paste it
+ manually. Defaults to `False`. Does not work when running in Vagrant.
+- `--shards=SHARDS` A list of shard ids to act on. Can either be a
+ comma-separated list (e.g. 0,1,2) or a range (e.g. 0-2) or any
+ combination of the two (e.g. 0-2,5,7-9). Defaults to acting on all
+ shards.
+
+### Updating a Job
+
+ aurora update [--shards=ids] <job key> <configuration file>
+ aurora cancel_update <job key> <configuration file>
+
+Given a running job, does a rolling update to reflect a new
+configuration version. Only updates Tasks in the Job with a changed
+configuration. You can further restrict the operated on Tasks by
+using `--shards` and specifying a comma-separated list of job shard ids.
+
+You may want to run `aurora diff` beforehand to validate which Tasks
+have different configurations.
+
+Updating jobs are locked to be sure the update finishes without
+disruption. If the update abnormally terminates, the lock may stay
+around and cause failure of subsequent update attempts.
+ `aurora cancel_update `unlocks the Job specified by
+its `job_key` argument. Be sure you don't issue `cancel_update` when
+another user is working with the specified Job.
+
+The `<configuration file>` argument for `cancel_update` is optional. Use
+it only if it contains hook definitions and activations that affect the
+`cancel_update` command. The `<configuration file>` argument for
+`update` is required, but in addition to a new configuration it can be
+used to define and activate hooks for `update`.
+
+`update` can take four named parameters:
+
+- `--shards=SHARDS` A list of shard ids to update. Can either be a
+ comma-separated list (e.g. 0,1,2) or a range (e.g. 0-2) or any
+ combination of the two (e.g. 0-2,5,7-9). If not set, all shards are
+ acted on. Defaults to None.
+- `-E NAME=VALUE` Binds a Thermos mustache variable name to a value.
+ Use multiple flags to specify multiple values. Defaults to `[]`.
+- `-j, --json` If specified, configuration is read in JSON format.
+ Defaults to `False`.
+- `--updater_health_check_interval_seconds=HEALTH_CHECK_INTERVAL_SECONDS`
+ Time interval between subsequent shard status checks. Defaults to `3`.
+
+#### Asynchronous job updates (beta)
+
+As of 0.6.0, Aurora will coordinate updates (and rollbacks) within the
+scheduler. Performing updates this way also allows the scheduler to display
+update progress and job update history in the browser.
+
+There are several sub-commands to manage job updates:
+
+ aurora2 beta-update start <job key> <configuration file
+ aurora2 beta-update status <job key>
+ aurora2 beta-update pause <job key>
+ aurora2 beta-update resume <job key>
+ aurora2 beta-update abort <job key>
+ aurora2 beta-update list <cluster>
+
+When you `start` a job update, the command will return once it has sent the
+instructions to the scheduler. At that point, you may view detailed
+progress for the update with the `status` subcommand, in addition to viewing
+graphical progress in the web browser. You may also get a full listing of
+in-progress updates in a cluster with `list`.
+
+Once an update has been started, you can `pause` to keep the update but halt
+progress. This can be useful for doing things like debug a partially-updated
+job to determine whether you would like to proceed. You can `resume` to
+proceed.
+
+You may `abort` a job update regardless of the state it is in. This will
+instruct the scheduler to completely abandon the job update and leave the job
+in the current (possibly partially-updated) state.
+
+### Renaming a Job
+
+Renaming is a tricky operation as downstream clients must be informed of
+the new name. A conservative approach
+to renaming suitable for production services is:
+
+1. Modify the Aurora configuration file to change the role,
+ environment, and/or name as appropriate to the standardized naming
+ scheme.
+2. Check that only these naming components have changed
+ with `aurora diff`.
+
+ aurora diff <job_key> <job_configuration>
+
+3. Create the (identical) job at the new key. You may need to request a
+ temporary quota increase.
+
+ aurora create <new_job_key> <job_configuration>
+
+4. Migrate all clients over to the new job key. Update all links and
+ dashboards. Ensure that both job keys run identical versions of the
+ code while in this state.
+5. After verifying that all clients have successfully moved over, kill
+ the old job.
+
+ aurora kill <old_job_key>
+
+6. If you received a temporary quota increase, be sure to let the
+ powers that be know you no longer need the additional capacity.
+
+### Restarting Jobs
+
+`restart` restarts all of a job key identified Job's shards:
+
+ aurora restart <job_key> <configuration file>
+
+Restarts are controlled on the client side, so aborting
+the `restart` command halts the restart operation.
+
+`restart` does a rolling restart. You almost always want to do this, but
+not if all shards of a service are misbehaving and are
+completely dysfunctional. To not do a rolling restart, use
+the `-shards` option described below.
+
+**Note**: `restart` only applies its command line arguments and does not
+use or is affected by `update.config`. Restarting
+does ***not*** involve a configuration change. To update the
+configuration, use `update.config`.
+
+The `<configuration file>` argument for restart is optional. Use it only
+if it contains hook definitions and activations that affect the
+`restart` command.
+
+In addition to the required job key argument, there are eight
+`restart` specific optional arguments:
+
+- `--updater_health_check_interval_seconds`: Defaults to `3`, the time
+ interval between subsequent shard status checks.
+- `--shards=SHARDS`: Defaults to None, which restarts all shards.
+ Otherwise, only the specified-by-id shards restart. They can be
+ comma-separated `(0, 8, 9)`, a range `(3-5)` or a
+ combination `(0, 3-5, 8, 9-11)`.
+- `--batch_size`: Defaults to `1`, the number of shards to be started
+ in one iteration. So, for example, for value 3, it tries to restart
+ the first three shards specified by `--shards` simultaneously, then
+ the next three, and so on.
+- `--max_per_shard_failures=MAX_PER_SHARD_FAILURES`: Defaults to `0`,
+ the maximum number of restarts per shard during restart. When
+ exceeded, it increments the total failure count.
+- `--max_total_failures=MAX_TOTAL_FAILURES`: Defaults to `0`, the
+ maximum total number of shard failures tolerated during restart.
+- `-o, --open_browser` Open a browser window to the scheduler UI Job
+ page after a job changing operation happens. When `False`, the Job
+ url prints on the console and the user has to copy/paste it
+ manually. Defaults to `False`. Does not work when running in Vagrant.
+- `--restart_threshold`: Defaults to `60`, the maximum number of
+ seconds before a shard must move into the `RUNNING` state before
+ it's considered a failure.
+- `--watch_secs`: Defaults to `45`, the minimum number of seconds a
+ shard must remain in `RUNNING` state before considered a success.
+
+Cron Jobs
+---------
+
+You will see various commands and options relating to cron jobs in
+`aurora -help` and similar. Ignore them, as they're not yet implemented.
+You might be able to use them without causing an error, but nothing happens
+if you do.
+
+Comparing Jobs
+--------------
+
+ aurora diff <job_key> config
+
+Compares a job configuration against a running job. By default the diff
+is determined using `diff`, though you may choose an alternate
+ diff program by specifying the `DIFF_VIEWER` environment variable.
+
+There are two named parameters:
+
+- `-E NAME=VALUE` Bind a Thermos mustache variable name to a
+ value. Multiple flags may be used to specify multiple values.
+ Defaults to `[]`.
+- `-j, --json` Read the configuration argument in JSON format.
+ Defaults to `False`.
+
+Viewing/Examining Jobs
+----------------------
+
+Above we discussed creating, killing, and updating Jobs. Here we discuss
+how to view and examine Jobs.
+
+### Listing Jobs
+
+ aurora list_jobs
+ Usage: `aurora list_jobs cluster/role
+
+Lists all Jobs registered with the Aurora scheduler in the named cluster for the named role.
+
+It has two named parameters:
+
+- `--pretty`: Displays job information in prettyprinted format.
+ Defaults to `False`.
+- `-c`, `--show-cron`: Shows cron schedule for jobs. Defaults to
+ `False`. Do not use, as it's not yet implemented.
+
+### Inspecting a Job
+
+ aurora inspect <job_key> config
+
+`inspect` verifies that its specified job can be parsed from a
+configuration file, and displays the parsed configuration. It has four
+named parameters:
+
+- `--local`: Inspect the configuration that the `spawn` command would
+ create, defaulting to `False`.
+- `--raw`: Shows the raw configuration. Defaults to `False`.
+- `-j`, `--json`: If specified, configuration is read in JSON format.
+ Defaults to `False`.
+- `-E NAME=VALUE`: Bind a Thermos Mustache variable name to a value.
+ You can use multiple flags to specify multiple values. Defaults
+ to `[]`
+
+### Versions
+
+ aurora version
+
+Lists client build information and what Aurora API version it supports.
+
+### Checking Your Quota
+
+ aurora get_quota --cluster=CLUSTER role
+
+ Prints the production quota allocated to the role's value at the given
+cluster.
+
+### Finding a Job on Web UI
+
+When you create a job, part of the output response contains a URL that goes
+to the job's scheduler UI page. For example:
+
+ vagrant@precise64:~$ aurora create devcluster/www-data/prod/hello /vagrant/examples/jobs/hello_world.aurora
+ INFO] Creating job hello
+ INFO] Response from scheduler: OK (message: 1 new tasks pending for job www-data/prod/hello)
+ INFO] Job url: http://precise64:8081/scheduler/www-data/prod/hello
+
+You can go to the scheduler UI page for this job via `http://precise64:8081/scheduler/www-data/prod/hello`
+You can go to the overall scheduler UI page by going to the part of that URL that ends at `scheduler`; `http://precise64:8081/scheduler`
+
+Once you click through to a role page, you see Jobs arranged
+separately by pending jobs, active jobs and finished jobs.
+Jobs are arranged by role, typically a service account for
+production jobs and user accounts for test or development jobs.
+
+### Getting Job Status
+
+ aurora status <job_key>
+
+Returns the status of recent tasks associated with the
+`job_key` specified Job in its supplied cluster. Typically this includes
+a mix of active tasks (running or assigned) and inactive tasks
+(successful, failed, and lost.)
+
+### Opening the Web UI
+
+Use the Job's web UI scheduler URL or the `aurora status` command to find out on which
+machines individual tasks are scheduled. You can open the web UI via the
+`open` command line command if invoked from your machine:
+
+ aurora open [<cluster>[/<role>[/<env>/<job_name>]]]
+
+If only the cluster is specified, it goes directly to that cluster's
+scheduler main page. If the role is specified, it goes to the top-level
+role page. If the full job key is specified, it goes directly to the job
+page where you can inspect individual tasks.
+
+### SSHing to a Specific Task Machine
+
+ aurora ssh <job_key> <shard number>
+
+You can have the Aurora client ssh directly to the machine that has been
+assigned a particular Job/shard number. This may be useful for quickly
+diagnosing issues such as performance issues or abnormal behavior on a
+particular machine.
+
+It can take three named parameters:
+
+- `-e`, `--executor_sandbox`: Run `ssh` in the executor sandbox
+ instead of the task sandbox. Defaults to `False`.
+- `--user=SSH_USER`: `ssh` as the given user instead of as the role in
+ the `job_key` argument. Defaults to none.
+- `-L PORT:NAME`: Add tunnel from local port `PORT` to the remote
+ named port `NAME`. Defaults to `[]`.
+
+### Templating Command Arguments
+
+ aurora run [-e] [-t THREADS] <job_key> -- <<command-line>>
+
+Given a job specification, run the supplied command on all hosts and
+return the output. You may use the standard Mustache templating rules:
+
+- `{{thermos.ports[name]}}` substitutes the specific named port of the
+ task assigned to this machine
+- `{{mesos.instance}}` substitutes the shard id of the job's task
+ assigned to this machine
+- `{{thermos.task_id}}` substitutes the task id of the job's task
+ assigned to this machine
+
+For example, the following type of pattern can be a powerful diagnostic
+tool:
+
+ aurora run -t5 cluster1/tyg/devel/seizure -- \
+ 'curl -s -m1 localhost:{{thermos.ports[http]}}/vars | grep uptime'
+
+By default, the command runs in the Task's sandbox. The `-e` option can
+run the command in the executor's sandbox. This is mostly useful for
+Aurora administrators.
+
+You can parallelize the runs by using the `-t` option.
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/source/documentation/latest/clientv2.md
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+Aurora Client v2
+=================
+
+Overview
+-----------
+
+Our goal is to replace the current Aurora command-line client. The
+current client suffers from an early monolithic structure, and a long
+development history of rapid unplanned evolution.
+
+In addition to its internal problems, the current Aurora client is
+confusing for users. There are several different kinds of objects
+manipulated by the Aurora command line, and the difference between
+them is often not clear. (What's the difference between a job and a
+configuration?) For each type of object, there are different commands,
+and it's hard to remember which command should be used for which kind
+of object.
+
+Instead of continuing to let the Aurora client develop and evolve
+randomly, it's time to take a principled look at the Aurora command
+line, and figure out how to make our command line processing make
+sense. At the same time, the code needs to be cleaned up, and divided
+into small comprehensible units based on a plugin architecture.
+
+Doing this now will give us a more intuitive, consistent, and easy to
+use client, as well as a sound platform for future development.
+
+Goals
+-------
+
+* A command line tool for interacting with Aurora that is easy for
+ users to understand.
+* A noun/verb command model.
+* A modular source-code architecture.
+* Non-disruptive transition for users.
+
+Non-Goals
+----------
+
+* The most important non-goal is that we're not trying to redesign the
+ Aurora scheduler, the Aurora executor, or any of the peripheral tools
+ that the Aurora command line interacts with; we only want to create a
+ better command line client.
+* We do not want to change thermos, mesos, hadoop, etc.
+* We do not want to create new objects that users will work with to
+ interact with Mesos or Aurora.
+* We do not want to change Aurora job configuration files or file formats.
+* We do not want to change the Aurora API.
+* We don't want to boil the ocean: there are many things that we could
+ include in the scope of this project, but we don't want to be
+ distracted by re-implementing all of twitter.commons in order to
+ create a perfect Aurora client.
+
+
+Background
+-----------
+
+Aurora is a system that's used to run and manage services and
+service-like jobs running in a datacenter. Aurora takes care of
+allocating resources in order to schedule and run jobs without
+requiring teams to manage dedicated hardware. The heart of Aurora is
+called the scheduler, and is responsible for finding and assigning
+resources to tasks.
+
+The Aurora scheduler provides a thrift API. The scheduler API is
+low-level and difficult to interact with. Users do not interact
+directly with the Aurora API; instead, they use a command-line tool,
+which provides a collection of easy-to-use commands. This command-line
+tool, in turn, talks to the scheduler API to launch and manage jobs in
+datacenter clusters. The command-line tool is called the Aurora
+client.
+
+The current implementation of the Aurora client is haphazard,
+and really needs to be cleaned up:
+
+- The code is monolithic and hard to maintain. It's implemented using
+ `twitter.common.app`, which assumes that all of the command code lives
+ in a single source file. To work around this, and allow some
+ subdivision, it uses a hack of `twitter.common.app` to force
+ registration of commands from multiple modules. It's hard to
+ understand, and hard to modify.
+- The current code is very difficult to test. Because of the way it's
+ built, there is no consistent way of passing key application data
+ around. As a result, each unit test of client operations needs a
+ difficult-to-assemble custom setup of mock objects.
+- The current code handles errors poorly, and it is difficult to
+ fix. Many common errors produce unacceptable results. For example,
+ issuing an unknown command generates an error message "main takes 0
+ parameters but received 1"; passing an invalid parameter to other
+ commands frequently produces a stack trace.
+- The current command line is confusing for users. There are several
+ different kinds of objects manipulated by the Aurora command line,
+ and the difference between them is often not entirely clear. (What's
+ the difference between a job and a configuration?)
+ For each type of object, there are different
+ commands, and it's frequently not clear just which command should be
+ used for which object.
+
+
+Instead of continuing to let it develop and evolve randomly, it's time
+to take a principled look at the Aurora command line, and figure out
+how to make command line processing make sense. At the same time, the
+code needs to be cleaned up, and divided into small comprehensible
+units based on a plugin architecture.
+
+Requirements
+-------------
+
+Aurora is aimed at engineers who run jobs and services in a
+datacenter. As a result, the requirements for the aurora client are
+all engineering focused:
+
+* __Consistency__: commands should follow a consistent structure, so that
+ users can apply knowledge and intuition gained from working with
+ some aurora commands to new commands. This means that when commands
+ can re-use the same options, they should; that objects should be
+ referred to by consistent syntax throughout the tool.
+* __Helpfulness__: commands should be structured so that the system can
+ generate helpful error messages. If a user just runs "aurora", they
+ should get a basic usage message. If they try to run an invalid
+ command, they should get a message that the command is invalid, not
+ a stack dump or "command main() takes 0 parameters but received
+ 2". Commands should not generate extraneous output that obscures the
+ key facts that the user needs to know, and the default behavior of
+ commands should not generate outputs that will be routinely ignored
+ by users.
+* __Extensibility__: it should be easy to plug in new commands,
+ including custom commands, to adapt the Aurora client to new
+ environments.
+* __Script-friendly command output__: every command should at least include
+ an option that generates output that's script-friendly. Scripts should be
+ able to work with command-output without needing to do screen scraping.
+* __Scalability__: the tools should be usable for any foreseeable size
+ of Aurora datacenters and machine clusters.
+
+Design Overview
+-----------------
+
+The Aurora client will be reimplemented using a noun-verb model,
+similar to the cmdlet model used by Monad/Windows Powershell. Users
+will work by providing a noun for the type of object being operated
+on, and a verb for the specific operation being performed on the
+object, followed by parameters. For example, to create a job, the user
+would execute: "`aurora job create smfd/mchucarroll/devel/jobname
+job.aurora`". The noun is `job` and the verb is `create`.
+
+The client will be implemented following that noun-verb
+convention. Each noun will be a separate component, which can be
+registered into the command-line framework. Each verb will be
+implemented by a class that registers with the appropriate noun. Nouns
+and verbs will each provide methods that add their command line
+options and parameters to the options parser, using the Python
+argparse library.
+
+Detailed Design
+-----------------
+
+### Interface
+
+In this section, we'll walk through the types of objects that the
+client can manipulate, and the operations that need to be provided for
+each object. These form the primary interface that engineers will use
+to interact with Aurora.
+
+In the command-line, each of the object types will have an Aurora
+subcommand. The commands to manipulate the object type will follow the
+type. For example, here are several commands in the old syntax
+contrasted against the new noun/verb syntax.
+
+* Get quota for a role:
+ * Noun/Verb syntax: `aurora quota get west/www-data`
+ * Old syntax: `aurora get_quota --cluster=smf1 www-data`
+* Create job:
+ * Noun/Verb syntax: `aurora job create west/www-data/test/job job.aurora`
+ * Old syntax: `aurora create west/www-data/test/job job.aurora`
+* Schedule a job to run at a specific interval:
+ * Noun/verb: `aurora cron schedule east/www-data/test/job job.aurora`
+ * Old: `aurora create east/www-data/test/job job.aurora`
+
+As you can see in these examples, the new syntax is more consistent:
+you always specify the cluster where a command executes as part of an
+identifier, where in the old syntax, it was sometimes part of the
+jobkey and sometimes specified with a "--cluster" option.
+
+The new syntax is also more clear and explicit: even without knowing
+much about Aurora, it's clear what objects each command is acting on,
+where in the old syntax, commands like "create" are unclear.
+
+### The Job Noun
+
+A job is a configured program ready to run in Aurora. A job is,
+conceptually, a task factory: when a job is submitted to the Aurora
+scheduler, it creates a collection of tasks. The job contains a
+complete description of everything it needs to create a collection of
+tasks. (Note that this subsumes "service" commands. A service is just
+a task whose configuration sets the is_service flag, so we don't have
+separate commands for working with services.) Jobs are specified using
+`cluster/role/env/name` jobkey syntax.
+
+* `aurora job create *jobkey* *config*`: submits a job to a cluster, launching the task(s) specified by the job config.
+* `aurora job status *jobkey*`: query job status. Prints information about the job,
+ whether it's running, etc., to standard out. If jobkey includes
+ globs, it should list all jobs that match the glob
+* `aurora job kill *jobkey*/*instanceids*`: kill/stop some of a jobs instances. This stops a job' tasks; if the job
+ has service tasks, they'll be disabled, so that they won't restart.
+* `aurora job killall *jobkey*`: kill all of the instances of a job. This
+ is distinct from the *kill* command as a safety measure: omitting the
+ instances from a kill command shouldn't result in destroying the entire job.
+* `aurora job restart *jobkey*`: conceptually, this will kill a job, and then
+ launch it again. If the job does not exist, then fail with an error
+ message. In fact, the underlying implementation does the
+ kill/relaunch on a rolling basis - so it's not an immediate kill of
+ all shards/instances, followed by a delay as all instances relaunch,
+ but rather a controlled gradual process.
+* `aurora job list *jobkey*`: list all jobs that match the jobkey spec that are
+ registered with the scheduler. This will include both jobs that are
+ currently running, and jobs that are scheduled to run at a later
+ time. The job key can be partial: if it specifies cluster, all jobs
+ on the cluster will be listed; cluster/role, all jobs running on the cluster under the role will be listed, etc.
+
+The Schedule Noun (Cron)
+--------------------------
+
+Note (3/21/2014): The "cron" noun is _not_ implemented yet.
+
+Cron is a scheduler adjunct that periodically runs a job on a
+schedule. The cron commands all manipulate cron schedule entries. The
+schedules are specified as a part of the job configuration.
+
+* `aurora cron schedule jobkey config`: schedule a job to run by cron. If a cron job already exists
+replaces its template with a new one.
+* `aurora cron deschedule jobkey`: removes a jobs entry from the cron schedule.
+* `aurora cron status jobkey`: query for a scheduled job's status.
+
+The Quota Noun
+---------------
+
+A quota is a data object maintained by the scheduler that specifies the maximum
+resources that may be consumed by jobs owned by a particular role. In the future,
+we may add new quota types. At some point, we'll also probably add an administrators
+command to set quotas.
+
+* `aurora quota get *cluster/role*`
+
+
+Implementation
+---------------
+
+The current command line is monolithic. Every command on an Aurora
+object is a top-level command in the Aurora client. In the
+restructured command line, each of the primary object types
+manipulated by Aurora should have its own sub-command.
+
+* Advantages of this approach:
+ * Easier to detangle the command-line processing. The top-level
+ command-processing will be a small set of subcommand
+ processors. Option processing for each subcommand can be offloaded
+ to a separate module.
+ * The aurora top-level help command will be much more
+ comprehensible. Instead of giving a huge list of every possible
+ command, it will present the list of top-level object types, and
+ then users can request help on the commands for a specific type
+ of object.
+ * The sub-commands can be separated into distinct command-line
+ tools when appropriate.
+
+### Command Structure and Options Processing
+
+The implementation will follow closely on Pants goals. Pants goals use
+a static registration system to add new subcommands. In pants, each
+goal command is an implementation of a command interface, and provides
+implementations of methods to register options and parameters, and to
+actually execute the command. In this design, commands are modular and
+easy to implement, debug, and combine in different ways.
+
+For the Aurora client, we plan to use a two-level variation of the
+basic concept from pants. At the top-level we will have nouns. A noun
+will define some common command-line parameters required by all of its
+verbs, and will provide a registration hook for attaching verbs. Nouns
+will be implemented as a subclass of a basic Noun type.
+
+Each verb will, similarly, be implemented as a subclass of Verb. Verbs
+will be able to specify command-line options and parameters.
+
+Both `Noun` and `Verb` will be subclasses of a common base-class `AuroraCommand`:
+
+ class AuroraCommand(object):
+ def get_options(self):
+ """Gets the set of command-line options objects for this command.
+ The result is a list of CommandOption objects.
+ """
+ pass
+
+ @property
+ def help(self):
+ """Returns the help message for this command"""
+
+ @property
+ def usage(self):
+ """Returns a short usage description of the command"""
+
+ @property
+ def name(self):
+ """Returns the command name"""
+
+
+A command-line tool will be implemented as an instance of a `CommandLine`:
+
+ class CommandLine(object):
+ """The top-level object implementing a command-line application."""
+
+ @property
+ def name(self):
+ """Returns the name of this command-line tool"""
+
+ def print_out(self, str):
+ print(str)
+
+ def print_err(self, str):
+ print(str, file=sys.stderr)
+
+ def register_noun(self, noun):
+ """Adds a noun to the application"""
+
+ def register_plugin(self, plugin):
+ """Adds a configuration plugin to the system"""
+
+
+Nouns are registered into a command-line using the `register_noun`
+method. They are weakly coupled to the application, making it easy to
+use a single noun in several different command-line tools. Nouns allow
+the registration of verbs using the `register_verb` method.
+
+When commands execute, they're given an instance of a *context object*.
+The context object must be an instance of a subclass of `AuroraCommandContext`.
+Options, parameters, and IO are all accessed using the context object. The context
+is created dynamically by the noun object owning the verb being executed. Developers
+are strongly encouraged to implement custom contexts for their nouns, and move functionality
+shared by the noun's verbs into the context object. The context interface is:
+
+ class Context(object):
+ class Error(Exception): pass
+
+ class ArgumentException(Error): pass
+
+ class CommandError(Error):
+
+ @classmethod
+ def exit(cls, code, msg):
+ """Exit the application with an error message"""
+ raise cls.CommandError(code, msg)
+
+ def print_out(self, msg, indent=0):
+ """Prints a message to standard out, with an indent"""
+
+ def print_err(self, msg, indent=0):
+ """Prints a message to standard err, with an indent"""
+
+
+In addition to nouns and verbs, there's one more kind of registerable
+component, called a *configuration plugin*. These objects add a set of
+command-line options that can be passed to *all* of the commands
+implemented in the tool. Before the command is executed, the
+configuration plugin will be invoked, and will process its
+command-line arguments. This is useful for general configuration
+changes, like establish a secure tunnel to talk to machines in a
+datacenter. (A useful way to think of a plugin is as something like an
+aspect that can be woven in to aurora to provide environment-specific
+configuration.) A configuration plugin is implemented as an instance
+of class `ConfigurationPlugin`, and registered with the
+`register_plugin` method of the `CommandLine` object. The interface of
+a plugin is:
+
+ class ConfigurationPlugin(object):
+ """A component that can be plugged in to a command-line."""
+
+ @abstractmethod
+ def get_options(self):
+ """Return the set of options processed by this plugin"""
+
+ @abstractmethod
+ def execute(self, context):
+ """Run the context/command line initialization code for this plugin."""
+
+
+### Command Execution
+
+The options process and command execution is built as a facade over Python's
+standard argparse. All of the actual argument processing is done by the
+argparse library.
+
+Once the options are processed, the framework will start to execute the command. Command execution consists of:
+
+# Create a context object. The framework will use the argparse options to identify
+ which noun is being invoked, and will call that noun's `create_context` method.
+ The argparse options object will be stored in the context.
+# Execute any configuration plugins. Before any command is invoked, the framework
+ will first iterate over all of the registered configuration plugins. For each
+ plugin, it will invoke the `execute` method.
+# The noun will use the context to find out what verb is being invoked, and it will
+ then call that verb's `execute` method.
+# The command will exit. Its return code will be whatever was returned by the verb's
+ `execute` method.
+
+Commands are expected to return a code from a list of standard exit codes,
+which can be found in `src/main/python/apache/aurora/client/cli/__init__.py`.
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/source/documentation/latest/committers.md
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+Setting up your email account
+-----------------------------
+Once your Apache ID has been set up you can configure your account and add ssh keys and setup an
+email forwarding address at
+
+ http://id.apache.org
+
+Additional instructions for setting up your new committer email can be found at
+
+ http://www.apache.org/dev/user-email.html
+
+The recommended setup is to configure all services (mailing lists, JIRA, ReviewBoard) to send
+emails to your @apache.org email address.
+
+
+Creating a gpg key for releases
+-------------------------------
+In order to create a release candidate you will need a gpg key published to an external key server
+and that key will need to be added to our KEYS file as well.
+
+1. Create a key:
+
+ gpg --gen-key
+
+2. Add your gpg key to the Apache Aurora KEYS file:
+
+ git clone https://git-wip-us.apache.org/repos/asf/incubator-aurora.git
+ (gpg --list-sigs <KEY ID> && gpg --armor --export <KEY ID>) >> KEYS
+ git add KEYS && git commit -m "Adding gpg key for <APACHE ID>"
+ ./rbt post -o -g
+
+3. Publish the key to an external key server:
+
+ gpg --keyserver pgp.mit.edu --send-keys <KEY ID>
+
+4. Update the changes to the KEYS file to the Apache Aurora svn dist locations listed below:
+
+ https://dist.apache.org/repos/dist/dev/incubator/aurora/KEYS
+ https://dist.apache.org/repos/dist/release/incubator/aurora/KEYS
+
+5. Add your key to git config for use with the release scripts:
+
+ git config --global user.signingkey <KEY ID>
+
+
+Creating a release
+------------------
+The following will guide you through the steps to create a release candidate, vote, and finally an
+official Apache Aurora release. Before starting your gpg key should be in the KEYS file and you
+must have access to commit to the dist.a.o repositories.
+
+1. Ensure that all issues resolved for this release candidate are tagged with the correct Fix
+Version in Jira, the changelog script will use this to generate the CHANGELOG in step #2.
+
+2. Create a release candidate. This will automatically update the CHANGELOG and commit it, create a
+branch and update the current version within the trunk. To create a minor version update and publish
+it run
+
+ ./build-support/release/release-candidate -l m -p
+
+3. Update, if necessary, the draft email created from the `release-candidate` script in step #2 and
+send the [VOTE] email to the dev@ and private@ mailing lists. You can verify the release signature
+and checksums by running
+
+ ./build-support/release/verify-release-candidate
+
+4. Wait for the vote to complete. If the vote fails address any issues and go back to step #1 and
+run again, this time you will use the -r flag to increment the release candidate version. This will
+automatically clean up the release candidate rc0 branch and source distribution.
+
+ ./build-support/release/release-candidate -l m -r 1 -p
+
+5. Once the vote has successfully passed create the release
+
+ ./build-support/release/release
+
+6. Update the draft email created fom the `release` script in step #5 to include the Apache ID's for
+all binding votes and send the [RESULT][VOTE] email to the dev@ and private@ mailing lists.
+
[02/18] incubator-aurora-website git commit: Initial move of website
over to git
Posted by jf...@apache.org.
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/source/documentation/latest/deploying-aurora-scheduler.md
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+# Deploying the Aurora Scheduler
+
+When setting up your cluster, you will install the scheduler on a small number (usually 3 or 5) of
+machines. This guide helps you get the scheduler set up and troubleshoot some common hurdles.
+
+- [Installing Aurora](#installing-aurora)
+ - [Creating the Distribution .zip File (Optional)](#creating-the-distribution-zip-file-optional)
+ - [Installing Aurora](#installing-aurora-1)
+- [Configuring Aurora](#configuring-aurora)
+ - [A Note on Configuration](#a-note-on-configuration)
+ - [Replicated Log Configuration](#replicated-log-configuration)
+ - [Initializing the Replicated Log](#initializing-the-replicated-log)
+ - [Storage Performance Considerations](#storage-performance-considerations)
+ - [Network considerations](#network-considerations)
+- [Running Aurora](#running-aurora)
+ - [Maintaining an Aurora Installation](#maintaining-an-aurora-installation)
+ - [Monitoring](#monitoring)
+ - [Running stateful services](#running-stateful-services)
+ - [Dedicated attribute](#dedicated-attribute)
+ - [Syntax](#syntax)
+ - [Example](#example)
+- [Common problems](#common-problems)
+ - [Replicated log not initialized](#replicated-log-not-initialized)
+ - [Symptoms](#symptoms)
+ - [Solution](#solution)
+ - [Scheduler not registered](#scheduler-not-registered)
+ - [Symptoms](#symptoms-1)
+ - [Solution](#solution-1)
+ - [Tasks are stuck in PENDING forever](#tasks-are-stuck-in-pending-forever)
+ - [Symptoms](#symptoms-2)
+ - [Solution](#solution-2)
+
+## Installing Aurora
+The Aurora scheduler is a standalone Java server. As part of the build process it creates a bundle
+of all its dependencies, with the notable exceptions of the JVM and libmesos. Each target server
+should have a JVM (Java 7 or higher) and libmesos (0.20.1) installed.
+
+### Creating the Distribution .zip File (Optional)
+To create a distribution for installation you will need build tools installed. On Ubuntu this can be
+done with `sudo apt-get install build-essential default-jdk`.
+
+ git clone http://git-wip-us.apache.org/repos/asf/incubator-aurora.git
+ cd incubator-aurora
+ ./gradlew distZip
+
+Copy the generated `dist/distributions/aurora-scheduler-*.zip` to each node that will run a scheduler.
+
+### Installing Aurora
+Extract the aurora-scheduler zip file. The example configurations assume it is extracted to
+`/usr/local/aurora-scheduler`.
+
+ sudo unzip dist/distributions/aurora-scheduler-*.zip -d /usr/local
+ sudo ln -nfs "$(ls -dt /usr/local/aurora-scheduler-* | head -1)" /usr/local/aurora-scheduler
+
+## Configuring Aurora
+
+### A Note on Configuration
+Like Mesos, Aurora uses command-line flags for runtime configuration. As such the Aurora
+"configuration file" is typically a `scheduler.sh` shell script of the form.
+
+ #!/bin/bash
+ AURORA_HOME=/usr/local/aurora-scheduler
+
+ # Flags controlling the JVM.
+ JAVA_OPTS=(
+ -Xmx2g
+ -Xms2g
+ # GC tuning, etc.
+ )
+
+ # Flags controlling the scheduler.
+ AURORA_FLAGS=(
+ -http_port=8081
+ # Log configuration, etc.
+ )
+
+ # Environment variables controlling libmesos
+ export JAVA_HOME=...
+ export GLOG_v=1
+ export LIBPROCESS_PORT=8083
+
+ JAVA_OPTS="${JAVA_OPTS[*]}" exec "$AURORA_HOME/bin/aurora-scheduler" "${AURORA_FLAGS[@]}"
+
+That way Aurora's current flags are visible in `ps` and in the `/vars` admin endpoint.
+
+Examples are available under `examples/scheduler/`. For a list of available Aurora flags and their
+documentation run
+
+ /usr/local/aurora-scheduler/bin/aurora-scheduler -help
+
+### Replicated Log Configuration
+All Aurora state is persisted to a replicated log. This includes all jobs Aurora is running
+including where in the cluster they are being run and the configuration for running them, as
+well as other information such as metadata needed to reconnect to the Mesos master, resource
+quotas, and any other locks in place.
+
+Aurora schedulers use ZooKeeper to discover log replicas and elect a leader. Only one scheduler is
+leader at a given time - the other schedulers follow log writes and prepare to take over as leader
+but do not communicate with the Mesos master. Either 3 or 5 schedulers are recommended in a
+production deployment depending on failure tolerance and they must have persistent storage.
+
+In a cluster with `N` schedulers, the flag `-native_log_quorum_size` should be set to
+`floor(N/2) + 1`. So in a cluster with 1 scheduler it should be set to `1`, in a cluster with 3 it
+should be set to `2`, and in a cluster of 5 it should be set to `3`.
+
+ Number of schedulers (N) | ```-native_log_quorum_size``` setting (```floor(N/2) + 1```)
+ ------------------------ | -------------------------------------------------------------
+ 1 | 1
+ 3 | 2
+ 5 | 3
+ 7 | 4
+
+*Incorrectly setting this flag will cause data corruption to occur!*
+
+See [this document](storage-config.md#scheduler-storage-configuration-flags) for more replicated
+log and storage configuration options.
+
+## Initializing the Replicated Log
+Before you start Aurora you will also need to initialize the log on the first master.
+
+ mesos-log initialize --path="$AURORA_HOME/scheduler/db"
+
+Failing to do this will result the following message when you try to start the scheduler.
+
+ Replica in EMPTY status received a broadcasted recover request
+
+### Storage Performance Considerations
+
+See [this document](/documentation/latest/scheduler-storage/) for scheduler storage performance considerations.
+
+### Network considerations
+The Aurora scheduler listens on 2 ports - an HTTP port used for client RPCs and a web UI,
+and a libprocess (HTTP+Protobuf) port used to communicate with the Mesos master and for the log
+replication protocol. These can be left unconfigured (the scheduler publishes all selected ports
+to ZooKeeper) or explicitly set in the startup script as follows:
+
+ # ...
+ AURORA_FLAGS=(
+ # ...
+ -http_port=8081
+ # ...
+ )
+ # ...
+ export LIBPROCESS_PORT=8083
+ # ...
+
+## Running Aurora
+Configure a supervisor like [Monit](http://mmonit.com/monit/) or
+[supervisord](http://supervisord.org/) to run the created `scheduler.sh` file and restart it
+whenever it fails. Aurora expects to be restarted by an external process when it fails. Aurora
+supports an active health checking protocol on its admin HTTP interface - if a `GET /health` times
+out or returns anything other than `200 OK` the scheduler process is unhealthy and should be
+restarted.
+
+For example, monit can be configured with
+
+ if failed port 8081 send "GET /health HTTP/1.0\r\n" expect "OK\n" with timeout 2 seconds for 10 cycles then restart
+
+assuming you set `-http_port=8081`.
+
+### Maintaining an Aurora Installation
+
+### Monitoring
+Please see our dedicated [monitoring guide](/documentation/latest/monitoring/) for in-depth discussion on monitoring.
+
+### Running stateful services
+Aurora is best suited to run stateless applications, but it also accommodates for stateful services
+like databases, or services that otherwise need to always run on the same machines.
+
+#### Dedicated attribute
+The Mesos slave has the `--attributes` command line argument which can be used to mark a slave with
+static attributes (not to be confused with `--resources`, which are dynamic and accounted).
+
+Aurora makes these attributes available for matching with scheduling
+[constraints](configuration-reference.md#specifying-scheduling-constraints). Most of these
+constraints are arbitrary and available for custom use. There is one exception, though: the
+`dedicated` attribute. Aurora treats this specially, and only allows matching jobs to run on these
+machines, and will only schedule matching jobs on these machines.
+
+##### Syntax
+The dedicated attribute has semantic meaning. The format is `$role(/.*)?`. When a job is created,
+the scheduler requires that the `$role` component matches the `role` field in the job
+configuration, and will reject the job creation otherwise. The remainder of the attribute is
+free-form. We've developed the idiom of formatting this attribute as `$role/$job`, but do not
+enforce this.
+
+##### Example
+Consider the following slave command line:
+
+ mesos-slave --attributes="host:$HOST;rack:$RACK;dedicated:db_team/redis" ...
+
+And this job configuration:
+
+ Service(
+ name = 'redis',
+ role = 'db_team',
+ constraints = {
+ 'dedicated': 'db_team/redis'
+ }
+ ...
+ )
+
+The job configuration is indicating that it should only be scheduled on slaves with the attribute
+`dedicated:dba_team/redis`. Additionally, Aurora will prevent any tasks that do _not_ have that
+constraint from running on those slaves.
+
+
+## Common problems
+So you've started your first cluster and are running into some issues? We've collected some common
+stumbling blocks and solutions here to help get you moving.
+
+### Replicated log not initialized
+
+#### Symptoms
+- Scheduler RPCs and web interface claim `Storage is not READY`
+- Scheduler log repeatedly prints messages like
+
+ ```
+ I1016 16:12:27.234133 26081 replica.cpp:638] Replica in EMPTY status
+ received a broadcasted recover request
+ I1016 16:12:27.234256 26084 recover.cpp:188] Received a recover response
+ from a replica in EMPTY status
+ ```
+
+#### Solution
+When you create a new cluster, you need to inform a quorum of schedulers that they are safe to
+consider their database to be empty by [initializing](#initializing-the-replicated-log) the
+replicated log. This is done to prevent the scheduler from modifying the cluster state in the event
+of multiple simultaneous disk failures or, more likely, misconfiguration of the replicated log path.
+
+### Scheduler not registered
+
+#### Symptoms
+Scheduler log contains
+
+ Framework has not been registered within the tolerated delay.
+
+#### Solution
+Double-check that the scheduler is configured correctly to reach the master. If you are registering
+the master in ZooKeeper, make sure command line argument to the master:
+
+ --zk=zk://$ZK_HOST:2181/mesos/master
+
+is the same as the one on the scheduler:
+
+ -mesos_master_address=zk://$ZK_HOST:2181/mesos/master
+
+### Tasks are stuck in `PENDING` forever
+
+#### Symptoms
+The scheduler is registered, and (receiving offers](docs/monitoring.md#scheduler_resource_offers),
+but tasks are perpetually shown as `PENDING - Constraint not satisfied: host`.
+
+#### Solution
+Check that your slaves are configured with `host` and `rack` attributes. Aurora requires that
+slaves are tagged with these two common failure domains to ensure that it can safely place tasks
+such that jobs are resilient to failure.
+
+See our [vagrant example](examples/vagrant/upstart/mesos-slave.conf) for details.
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+Getting Started
+===============
+
+Aurora consists of four main pieces: the scheduler (which finds resources in the cluster that can be used to run a job), the executor (which uses the resources assigned by the scheduler to run a job), the command-line client, and the web-ui. For information about working on the scheduler or the webUI, see the file "developing-aurora-scheduler.md" in this directory.
+
+If you want to work on the command-line client, this is the place for you!
+
+The client is written in Python, and unlike the server side of things, we build the client using the Pants build tool, instead of Gradle. Pants is a tool that was built by twitter for handling builds of large collaborative systems. You can see a detailed explanation of
+pants [here](http://pantsbuild.github.io/python-readme.html).
+
+To build the client executable, run the following in a command-shell:
+
+ $ ./pants src/main/python/apache/aurora/client/cli:aurora2
+
+This will produce a python executable _pex_ file in `dist/aurora2.pex`. Pex files
+are fully self-contained executables: just copy the pex file into your path, and you'll be able to run it. For example, for a typical installation:
+
+ $ cp dist/aurora2.pex /usr/local/bin/aurora
+
+To run all of the client tests:
+
+ $ ./pasts src/test/python/apache/aurora/client/:all
+
+
+Client Configuration
+====================
+
+The client uses a configuration file that specifies available clusters. More information about the
+contents of this file can be found in the
+[Client Cluster Configuration](/documentation/latest/client-cluster-configuration/) documentation. Information about
+how the client locates this file can be found in the
+[Client Commands](client-commands.md#cluster-configuration) documentation.
+
+Client Versions
+===============
+
+There are currently two versions of the aurora client, imaginatively known as v1 and v2. All new development is done entirely in v2, but we continue to support and fix bugs in v1, until we get to the point where v2 is feature-complete and tested, and aurora users have had some time at adapt and switch their processes to use v2.
+
+Both versions are built on the same underlying API code.
+
+Client v1 was implemented using twitter.common.app. The command-line processing code for v1 can be found in `src/main/python/apache/aurora/client/commands` and
+`src/main/python/apache/aurora/client/bin`.
+
+Client v2 was implemented using its own noun/verb framework. The client v2 code can be found in `src/main/python/apache/aurora/client/cli`, and the noun/verb framework can be
+found in the `__init__.py` file in that directory.
+
+
+Building and Testing the Client
+===============================
+
+Building and testing the client code are both done using Pants. The relevant targets to know about are:
+
+ * Build a client v2 executable: `./pants src/main/python/apache/aurora/client/cli:aurora2`
+ * Test client v2 code: `./pants ./pants src/test/python/apache/aurora/client/cli:all`
+ * Build a client v1 executable: `./pants src/main/python/apache/aurora/client/bin:aurora_client`
+ * Test client v1 code: `./pants src/main/python/apache/aurora/client/commands:all`
+ * Test all client code: `./pants src/main/python/apache/aurora/client:all`
+
+
+Overview of the Client Architecture
+===================================
+
+The client is built on a stacked architecture:
+
+ 1. At the lowest level, we have a thrift RPC API interface
+ to the aurora scheduler. The interface is declared in thrift, in the file
+ `src/main/thrift/org/apache/aurora/gen/api.thrift`.
+
+ 2. On top of the primitive API, we have a client API. The client API
+ takes the primitive operations provided by the scheduler, and uses them
+ to implement client-side behaviors. For example, when you update a job,
+ on the scheduler, that's done by a sequence of operations. The sequence is implemented
+ by the client API `update` method, which does the following using the thrift API:
+ * fetching the state of task instances in the mesos cluster, and figuring out which need
+ to be updated;
+ * For each task to be updated:
+ - killing the old version;
+ - starting the new version;
+ - monitoring the new version to ensure that the update succeeded.
+ 3. On top of the API, we have the command-line client itself. The core client, at this level,
+ consists of the interface to the command-line which the user will use to interact with aurora.
+ The client v2 code is found in `src/python/apache/aurora/client/cli`. In the `cli` directory,
+ the rough structure is as follows:
+ * `__init__.py` contains the noun/verb command-line processing framework used by client v2.
+ * `jobs.py` contains the implementation of the core `job` noun, and all of its operations.
+ * `bridge.py` contains the implementation of a component that allows us to ship a
+ combined client that runs both v1 and v2 client commands during the transition period.
+ * `client.py` contains the code that binds the client v2 nouns and verbs into an executable.
+
+Running/Debugging the Client
+============================
+
+For manually testing client changes against a cluster, we use vagrant. To start a virtual cluster,
+you need to install a working vagrant environment, and then run "vagrant up" for the root of
+the aurora workspace. This will create a vagrant host named "devcluster", with a mesos master,
+a set of mesos slaves, and an aurora scheduler.
+
+To use the devcluster, you need to bring it up by running `vagrant up`, and then connect to the vagrant host using `vagrant ssh`. This will open a bash session on the virtual machine hosting the devcluster. In the home directory, there are two key paths to know about:
+
+ * `~/aurora`: this is a copy of the git workspace in which you launched the vagrant cluster.
+ To test client changes, you'll use this copy.
+ * `/vagrant`: this is a mounted filesystem that's a direct image of your git workspace.
+ This isn't a copy - it is your git workspace. Editing files on your host machine will
+ be immediately visible here, because they are the same files.
+
+Whenever the scheduler is modified, to update your vagrant environment to use the new scheduler,
+you'll need to re-initialize your vagrant images. To do this, you need to run two commands:
+
+ * `vagrant destroy`: this will delete the old devcluster image.
+ * `vagrant up`: this creates a fresh devcluster image based on the current state of your workspace.
+
+You should try to minimize rebuilding vagrant images; it's not horribly slow, but it does take a while.
+
+To test client changes:
+
+ * Make a change in your local workspace, and commit it.
+ * `vagrant ssh` into the devcluster.
+ * `cd aurora`
+ * Pull your changes into the vagrant copy: `git pull /vagrant *branchname*`.
+ * Build the modified client using pants.
+ * Run your command using `aurora2`. (You don't need to do any install; the aurora2 command
+ is a symbolic link to the executable generated by pants.)
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+Java code in the aurora repo is built with [Gradle](http://gradle.org).
+
+Getting Started
+===============
+You will need Java 7 installed and on your `PATH` or unzipped somewhere with `JAVA_HOME` set. Then
+
+ ./gradlew tasks
+
+will bootstrap the build system and show available tasks. This can take a while the first time you
+run it but subsequent runs will be much faster due to cached artifacts.
+
+Running the Tests
+-----------------
+Aurora has a comprehensive unit test suite. To run the tests use
+
+ ./gradlew build
+
+Gradle will only re-run tests when dependencies of them have changed. To force a re-run of all
+tests use
+
+ ./gradlew clean build
+
+Running the build with code quality checks
+------------------------------------------
+To speed up development iteration, the plain gradle commands will not run static analysis tools.
+However, you should run these before posting a review diff, and **always** run this before pushing a
+commit to origin/master.
+
+ ./gradlew build -Pq
+
+Creating a bundle for deployment
+--------------------------------
+Gradle can create a zip file containing Aurora, all of its dependencies, and a launch script with
+
+ ./gradlew distZip
+
+or a tar file containing the same files with
+
+ ./gradlew distTar
+
+The output file will be written to `dist/distributions/aurora-scheduler.zip` or
+`dist/distributions/aurora-scheduler.tar`.
+
+Developing Aurora Java code
+===========================
+
+Setting up an IDE
+-----------------
+Gradle can generate project files for your IDE. To generate an IntelliJ IDEA project run
+
+ ./gradlew idea
+
+and import the generated `aurora.ipr` file.
+
+Adding or Upgrading a Dependency
+--------------------------------
+New dependencies can be added from Maven central by adding a `compile` dependency to `build.gradle`.
+For example, to add a dependency on `com.example`'s `example-lib` 1.0 add this block:
+
+ compile 'com.example:example-lib:1.0'
+
+NOTE: Anyone thinking about adding a new dependency should first familiarize themself with the
+Apache Foundation's third-party licensing
+[policy](http://www.apache.org/legal/resolved.html#category-x).
+
+Developing Aurora UI
+======================
+
+Installing bower (optional)
+----------------------------
+Third party JS libraries used in Aurora (located at 3rdparty/javascript/bower_components) are
+managed by bower, a JS dependency manager. Bower is only required if you plan to add, remove or
+update JS libraries. Bower can be installed using the following command:
+
+ npm install -g bower
+
+Bower depends on node.js and npm. The easiest way to install node on a mac is via brew:
+
+ brew install node
+
+For more node.js installation options refer to https://github.com/joyent/node/wiki/Installation.
+
+More info on installing and using bower can be found at: http://bower.io/. Once installed, you can
+use the following commands to view and modify the bower repo at
+3rdparty/javascript/bower_components
+
+ bower list
+ bower install <library name>
+ bower remove <library name>
+ bower update <library name>
+ bower help
+
+Developing the Aurora Build System
+==================================
+
+Bootstrapping Gradle
+--------------------
+The following files were autogenerated by `gradle wrapper` using gradle 1.8's
+[Wrapper](http://www.gradle.org/docs/1.8/dsl/org.gradle.api.tasks.wrapper.Wrapper.html) plugin and
+should not be modified directly:
+
+ ./gradlew
+ ./gradlew.bat
+ ./gradle/wrapper/gradle-wrapper.jar
+ ./gradle/wrapper/gradle-wrapper.properties
+
+To upgrade Gradle unpack the new version somewhere, run `/path/to/new/gradle wrapper` in the
+repository root and commit the changed files.
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+# Hooks for Aurora Client API
+
+- [Introduction](#introduction)
+- [Hook Types](#hook-types)
+- [Execution Order](#execution-order)
+- [Hookable Methods](#hookable-methods)
+- [Activating and Using Hooks](#activating-and-using-hooks)
+- [.aurora Config File Settings](#aurora-config-file-settings)
+- [Command Line](#command-line)
+- [Hooks Protocol](#hooks-protocol)
+ - [pre_ Methods](#pre_-methods)
+ - [err_ Methods](#err_-methods)
+ - [post_ Methods](#post_-methods)
+- [Generic Hooks](#generic-hooks)
+- [Hooks Process Checklist](#hooks-process-checklist)
+
+## Introduction
+
+You can execute hook methods around Aurora API Client methods when they are called by the Aurora Command Line commands.
+
+Explaining how hooks work is a bit tricky because of some indirection about what they apply to. Basically, a hook is code that executes when a particular Aurora Client API method runs, letting you extend the method's actions. The hook executes on the client side, specifically on the machine executing Aurora commands.
+
+The catch is that hooks are associated with Aurora Client API methods, which users don't directly call. Instead, users call Aurora Command Line commands, which call Client API methods during their execution. Since which hooks run depend on which Client API methods get called, you will need to know which Command Line commands call which API methods. Later on, there is a table showing the various associations.
+
+**Terminology Note**: From now on, "method(s)" refer to Client API methods, and "command(s)" refer to Command Line commands.
+
+## Hook Types
+
+Hooks have three basic types, differing by when they run with respect to their associated method.
+
+`pre_<method_name>`: When its associated method is called, the `pre_` hook executes first, then the called method. If the `pre_` hook fails, the method never runs. Later code that expected the method to succeed may be affected by this, and result in terminating the Aurora client.
+
+Note that a `pre_` hook can error-trap internally so it does not
+return `False`. Designers/contributors of new `pre_` hooks should
+consider whether or not to error-trap them. You can error trap at the
+highest level very generally and always pass the `pre_` hook by
+returning `True`. For example:
+
+```python
+def pre_create(...):
+ do_something() # if do_something fails with an exception, the create_job is not attempted!
+ return True
+
+# However...
+def pre_create(...):
+ try:
+ do_something() # may cause exception
+ except Exception: # generic error trap will catch it
+ pass # and ignore the exception
+ return True # create_job will run in any case!
+```
+
+`post_<method_name>`: A `post_` hook executes after its associated method successfully finishes running. If it fails, the already executed method is unaffected. A `post_` hook's error is trapped, and any later operations are unaffected.
+
+`err_<method_name>`: Executes only when its associated method returns a status other than OK or throws an exception. If an `err_` hook fails, the already executed method is unaffected. An `err_` hook's error is trapped, and any later operations are unaffected.
+
+## Execution Order
+
+A command with `pre_`, `post_`, and `err_` hooks defined and activated for its called method executes in the following order when the method successfully executes:
+
+1. Command called
+2. Command code executes
+3. Method Called
+4. `pre_` method hook runs
+5. Method runs and successfully finishes
+6. `post_` method hook runs
+7. Command code executes
+8. Command execution ends
+
+The following is what happens when, for the same command and hooks, the method associated with the command suffers an error and does not successfully finish executing:
+
+1. Command called
+2. Command code executes
+3. Method Called
+4. `pre_` method hook runs
+5. Method runs and fails
+6. `err_` method hook runs
+7. Command Code executes (if `err_` method does not end the command execution)
+8. Command execution ends
+
+Note that the `post_` and `err_` hooks for the same method can never both run for a single execution of that method.
+
+## Hookable Methods
+
+You can associate `pre_`, `post_`, and `err_` hooks with the following methods. Since you do not directly interact with the methods, but rather the Aurora Command Line commands that call them, for each method we also list the command(s) that can call the method. Note that a different method or methods may be called by a command depending on how the command's other code executes. Similarly, multiple commands can call the same method. We also list the methods' argument signatures, which are used by their associated hooks. <a name="Chart"></a>
+
+ Aurora Client API Method | Client API Method Argument Signature | Aurora Command Line Command
+ -------------------------| ------------------------------------- | ---------------------------
+ ```cancel_update``` | ```self```, ```job_key``` | ```cancel_update```
+ ```create_job``` | ```self```, ```config``` | ```create```, <code>runtask
+ ```restart``` | ```self```, ```job_key```, ```shards```, ```update_config```, ```health_check_interval_seconds``` | ```restart```
+ ```update_job``` | ```self```, ```config```, ```health_check_interval_seconds=3```, ```shards=None``` | ```update```
+ ```kill_job``` | ```self```, ```job_key```, ```shards=None``` | ```kill```
+
+Some specific examples:
+
+* `pre_create_job` executes when a `create_job` method is called, and before the `create_job` method itself executes.
+
+* `post_cancel_update` executes after a `cancel_update` method has successfully finished running.
+
+* `err_kill_job` executes when the `kill_job` method is called, but doesn't successfully finish running.
+
+## Activating and Using Hooks
+
+By default, hooks are inactive. If you do not want to use hooks, you do not need to make any changes to your code. If you do want to use hooks, you will need to alter your `.aurora` config file to activate them both for the configuration as a whole as well as for individual `Job`s. And, of course, you will need to define in your config file what happens when a particular hook executes.
+
+## .aurora Config File Settings
+
+You can define a top-level `hooks` variable in any `.aurora` config file. `hooks` is a list of all objects that define hooks used by `Job`s defined in that config file. If you do not want to define any hooks for a configuration, `hooks` is optional.
+
+ hooks = [Object_with_defined_hooks1, Object_with_defined_hooks2]
+
+Be careful when assembling a config file using `include` on multiple smaller config files. If there are multiple files that assign a value to `hooks`, only the last assignment made will stick. For example, if `x.aurora` has `hooks = [a, b, c]` and `y.aurora` has `hooks = [d, e, f]` and `z.aurora` has, in this order, `include x.aurora` and `include y.aurora`, the `hooks` value will be `[d, e, f]`.
+
+Also, for any `Job` that you want to use hooks with, its `Job` definition in the `.aurora` config file must set an `enable_hooks` flag to `True` (it defaults to `False`). By default, hooks are disabled and you must enable them for `Job`s of your choice.
+
+To summarize, to use hooks for a particular job, you must both activate hooks for your config file as a whole, and for that job. Activating hooks only for individual jobs won't work, nor will only activating hooks for your config file as a whole. You must also specify the hooks' defining object in the `hooks` variable.
+
+Recall that `.aurora` config files are written in Pystachio. So the following turns on hooks for production jobs at cluster1 and cluster2, but leaves them off for similar jobs with a defined user role. Of course, you also need to list the objects that define the hooks in your config file's `hooks` variable.
+
+```python
+jobs = [
+ Job(enable_hooks = True, cluster = c, env = 'prod') for c in ('cluster1', 'cluster2')
+ ]
+jobs.extend(
+ Job(cluster = c, env = 'prod', role = getpass.getuser()) for c in ('cluster1', 'cluster2'))
+ # Hooks disabled for these jobs
+```
+
+## Command Line
+
+All Aurora Command Line commands now accept an `.aurora` config file as an optional parameter (some, of course, accept it as a required parameter). Whenever a command has a `.aurora` file parameter, any hooks specified and activated in the `.aurora` file can be used. For example:
+
+ aurora restart cluster1/role/env/app myapp.aurora
+
+The command activates any hooks specified and activated in `myapp.aurora`. For the `restart` command, that is the only thing the `myapp.aurora` parameter does. So, if the command was the following, since there is no `.aurora` config file to specify any hooks, no hooks on the `restart` command can run.
+
+ aurora restart cluster1/role/env/app
+
+## Hooks Protocol
+
+Any object defined in the `.aurora` config file can define hook methods. You should define your hook methods within a class, and then use the class name as a value in the `hooks` list in your config file.
+
+Note that you can define other methods in the class that its hook methods can call; all the logic of a hook does not have to be in its definition.
+
+The following example defines a class containing a `pre_kill_job` hook definition that calls another method defined in the class.
+
+```python
+# Defines a method pre_kill_job
+class KillConfirmer(object):
+ def confirm(self, msg):
+ return raw_input(msg).lower() == 'yes'
+
+ def pre_kill_job(self, job_key, shards=None):
+ shards = ('shards %s' % shards) if shards is not None else 'all shards'
+ return self.confirm('Are you sure you want to kill %s (%s)? (yes/no): '
+ % (job_key, shards))
+```
+
+### pre_ Methods
+
+`pre_` methods have the signature:
+
+ pre_<API method name>(self, <associated method's signature>)
+
+`pre_` methods have the same signature as their associated method, with the addition of `self` as the first parameter. See the [chart](#Chart) above for the mapping of parameters to methods. When writing `pre_` methods, you can use the `*` and `**` syntax to designate that all unspecified parameters are passed in a list to the `*`ed variable and all named parameters with values are passed as name/value pairs to the `**`ed variable.
+
+If this method returns False, the API command call aborts.
+
+### err_ Methods
+
+`err_` methods have the signature:
+
+ err_<API method name>(self, exc, <associated method's signature>)
+
+`err_` methods have the same signature as their associated method, with the addition of a first parameter `self` and a second parameter `exc`. `exc` is either a result with responseCode other than `ResponseCode.OK` or an `Exception`. See the [chart](#Chart) above for the mapping of parameters to methods. When writing `err`_ methods, you can use the `*` and `**` syntax to designate that all unspecified parameters are passed in a list to the `*`ed variable and all named parameters with values are passed as name/value pairs to the `**`ed variable.
+
+`err_` method return codes are ignored.
+
+### post_ Methods
+
+`post_` methods have the signature:
+
+ post_<API method name>(self, result, <associated method signature>)
+
+`post_` method parameters are `self`, then `result`, followed by the same parameter signature as their associated method. `result` is the result of the associated method call. See the [chart](#chart) above for the mapping of parameters to methods. When writing `post_` methods, you can use the `*` and `**` syntax to designate that all unspecified arguments are passed in a list to the `*`ed parameter and all unspecified named arguments with values are passed as name/value pairs to the `**`ed parameter.
+
+`post_` method return codes are ignored.
+
+## Generic Hooks
+
+There are five Aurora API Methods which any of the three hook types can attach to. Thus, there are 15 possible hook/method combinations for a single `.aurora` config file. Say that you define `pre_` and `post_` hooks for the `restart` method. That leaves 13 undefined hook/method combinations; `err_restart` and the 3 `pre_`, `post_`, and `err_` hooks for each of the other 4 hookable methods. You can define what happens when any of these otherwise undefined 13 hooks execute via a generic hook, whose signature is:
+
+```python
+generic_hook(self, hook_config, event, method_name, result_or_err, args*, kw**)
+```
+
+where:
+
+* `hook_config` is a named tuple of `config` (the Pystashio `config` object) and `job_key`.
+
+* `event` is one of `pre`, `err`, or `post`, indicating which type of hook the genetic hook is standing in for. For example, assume no specific hooks were defined for the `restart` API command. If `generic_hook` is defined and activated, and `restart` is called, `generic_hook` will effectively run as `pre_restart`, `post_restart`, and `err_restart`. You can use a selection statement on this value so that `generic_hook` will act differently based on whether it is standing in for a `pre_`, `post_`, or `err_` hook.
+
+* `method_name` is the Client API method name whose execution is causing this execution of the `generic_hook`.
+
+* `args*`, `kw**` are the API method arguments and keyword arguments respectively.
+* `result_or_err` is a tri-state parameter taking one of these three values:
+ 1. None for `pre_`hooks
+ 2. `result` for `post_` nooks
+ 3. `exc` for `err_` hooks
+
+Example:
+
+```python
+# Overrides the standard do-nothing generic_hook by adding a log writing operation.
+from twitter.common import log
+ class Logger(object):
+ '''Adds to the log every time a hookable API method is called'''
+ def generic_hook(self, hook_config, event, method_name, result_or_err, *args, **kw)
+ log.info('%s: %s_%s of %s'
+ % (self.__class__.__name__, event, method_name, hook_config.job_key))
+```
+
+## Hooks Process Checklist
+
+1. In your `.aurora` config file, add a `hooks` variable. Note that you may want to define a `.aurora` file only for hook definitions and then include this file in multiple other config files that you want to use the same hooks.
+
+```python
+hooks = []
+```
+
+2. In the `hooks` variable, list all objects that define hooks used by `Job`s defined in this config:
+
+```python
+hooks = [Object_hook_definer1, Object_hook_definer2]
+```
+
+3. For each job that uses hooks in this config file, add `enable_hooks = True` to the `Job` definition. Note that this is necessary even if you only want to use the generic hook.
+
+4. Write your `pre_`, `post_`, and `err_` hook definitions as part of an object definition in your `.aurora` config file.
+
+5. If desired, write your `generic_hook` definition as part of an object definition in your `.aurora` config file. Remember, the object must be listed as a member of `hooks`.
+
+6. If your Aurora command line command does not otherwise take an `.aurora` config file argument, add the appropriate `.aurora` file as an argument in order to define and activate the configuration's hooks.
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/source/documentation/latest/images/CPUavailability.png
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+# Monitoring your Aurora cluster
+
+Before you start running important services in your Aurora cluster, it's important to set up
+monitoring and alerting of Aurora itself. Most of your monitoring can be against the scheduler,
+since it will give you a global view of what's going on.
+
+## Reading stats
+The scheduler exposes a *lot* of instrumentation data via its HTTP interface. You can get a quick
+peek at the first few of these in our vagrant image:
+
+ $ vagrant ssh -c 'curl -s localhost:8081/vars | head'
+ async_tasks_completed 1004
+ attribute_store_fetch_all_events 15
+ attribute_store_fetch_all_events_per_sec 0.0
+ attribute_store_fetch_all_nanos_per_event 0.0
+ attribute_store_fetch_all_nanos_total 3048285
+ attribute_store_fetch_all_nanos_total_per_sec 0.0
+ attribute_store_fetch_one_events 3391
+ attribute_store_fetch_one_events_per_sec 0.0
+ attribute_store_fetch_one_nanos_per_event 0.0
+ attribute_store_fetch_one_nanos_total 454690753
+
+These values are served as `Content-Type: text/plain`, with each line containing a space-separated metric
+name and value. Values may be integers, doubles, or strings (note: strings are static, others
+may be dynamic).
+
+If your monitoring infrastructure prefers JSON, the scheduler exports that as well:
+
+ $ vagrant ssh -c 'curl -s localhost:8081/vars.json | python -mjson.tool | head'
+ {
+ "async_tasks_completed": 1009,
+ "attribute_store_fetch_all_events": 15,
+ "attribute_store_fetch_all_events_per_sec": 0.0,
+ "attribute_store_fetch_all_nanos_per_event": 0.0,
+ "attribute_store_fetch_all_nanos_total": 3048285,
+ "attribute_store_fetch_all_nanos_total_per_sec": 0.0,
+ "attribute_store_fetch_one_events": 3409,
+ "attribute_store_fetch_one_events_per_sec": 0.0,
+ "attribute_store_fetch_one_nanos_per_event": 0.0,
+
+This will be the same data as above, served with `Content-Type: application/json`.
+
+## Viewing live stat samples on the scheduler
+The scheduler uses the Twitter commons stats library, which keeps an internal time-series database
+of exported variables - nearly everything in `/vars` is available for instant graphing. This is
+useful for debugging, but is not a replacement for an external monitoring system.
+
+You can view these graphs on a scheduler at `/graphview`. It supports some composition and
+aggregation of values, which can be invaluable when triaging a problem. For example, if you have
+the scheduler running in vagrant, check out these links:
+[simple graph](http://192.168.33.7:8081/graphview?query=jvm_uptime_secs)
+[complex composition](http://192.168.33.7:8081/graphview?query=rate\(scheduler_log_native_append_nanos_total\)%2Frate\(scheduler_log_native_append_events\)%2F1e6)
+
+### Counters and gauges
+Among numeric stats, there are two fundamental types of stats exported: _counters_ and _gauges_.
+Counters are guaranteed to be monotonically-increasing for the lifetime of a process, while gauges
+may decrease in value. Aurora uses counters to represent things like the number of times an event
+has occurred, and gauges to capture things like the current length of a queue. Counters are a
+natural fit for accurate composition into [rate ratios](http://en.wikipedia.org/wiki/Rate_ratio)
+(useful for sample-resistant latency calculation), while gauges are not.
+
+# Alerting
+
+## Quickstart
+If you are looking for just bare-minimum alerting to get something in place quickly, set up alerting
+on `framework_registered` and `task_store_LOST`. These will give you a decent picture of overall
+health.
+
+## A note on thresholds
+One of the most difficult things in monitoring is choosing alert thresholds. With many of these
+stats, there is no value we can offer as a threshold that will be guaranteed to work for you. It
+will depend on the size of your cluster, number of jobs, churn of tasks in the cluster, etc. We
+recommend you start with a strict value after viewing a small amount of collected data, and then
+adjust thresholds as you see fit. Feel free to ask us if you would like to validate that your alerts
+and thresholds make sense.
+
+#### `jvm_uptime_secs`
+Type: integer counter
+
+#### Description
+The number of seconds the JVM process has been running. Comes from
+[RuntimeMXBean#getUptime()](http://docs.oracle.com/javase/7/docs/api/java/lang/management/RuntimeMXBean.html#getUptime\(\))
+
+#### Alerting
+Detecting resets (decreasing values) on this stat will tell you that the scheduler is failing to
+stay alive.
+
+#### Triage
+Look at the scheduler logs to identify the reason the scheduler is exiting.
+
+#### `system_load_avg`
+Type: double gauge
+
+#### Description
+The current load average of the system for the last minute. Comes from
+[OperatingSystemMXBean#getSystemLoadAverage()](http://docs.oracle.com/javase/7/docs/api/java/lang/management/OperatingSystemMXBean.html?is-external=true#getSystemLoadAverage\(\)).
+
+#### Alerting
+A high sustained value suggests that the scheduler machine may be over-utilized.
+
+#### Triage
+Use standard unix tools like `top` and `ps` to track down the offending process(es).
+
+#### `process_cpu_cores_utilized`
+Type: double gauge
+
+#### Description
+The current number of CPU cores in use by the JVM process. This should not exceed the number of
+logical CPU cores on the machine. Derived from
+[OperatingSystemMXBean#getProcessCpuTime()](http://docs.oracle.com/javase/7/docs/jre/api/management/extension/com/sun/management/OperatingSystemMXBean.html)
+
+#### Alerting
+A high sustained value indicates that the scheduler is overworked. Due to current internal design
+limitations, if this value is sustained at `1`, there is a good chance the scheduler is under water.
+
+#### Triage
+There are two main inputs that tend to drive this figure: task scheduling attempts and status
+updates from Mesos. You may see activity in the scheduler logs to give an indication of where
+time is being spent. Beyond that, it really takes good familiarity with the code to effectively
+triage this. We suggest engaging with an Aurora developer.
+
+#### `task_store_LOST`
+Type: integer gauge
+
+#### Description
+The number of tasks stored in the scheduler that are in the `LOST` state, and have been rescheduled.
+
+#### Alerting
+If this value is increasing at a high rate, it is a sign of trouble.
+
+#### Triage
+There are many sources of `LOST` tasks in Mesos: the scheduler, master, slave, and executor can all
+trigger this. The first step is to look in the scheduler logs for `LOST` to identify where the
+state changes are originating.
+
+#### `scheduler_resource_offers`
+Type: integer counter
+
+#### Description
+The number of resource offers that the scheduler has received.
+
+#### Alerting
+For a healthy scheduler, this value must be increasing over time.
+
+##### Triage
+Assuming the scheduler is up and otherwise healthy, you will want to check if the master thinks it
+is sending offers. You should also look at the master's web interface to see if it has a large
+number of outstanding offers that it is waiting to be returned.
+
+#### `framework_registered`
+Type: binary integer counter
+
+#### Description
+Will be `1` for the leading scheduler that is registered with the Mesos master, `0` for passive
+schedulers,
+
+#### Alerting
+A sustained period without a `1` (or where `sum() != 1`) warrants investigation.
+
+#### Triage
+If there is no leading scheduler, look in the scheduler and master logs for why. If there are
+multiple schedulers claiming leadership, this suggests a split brain and warrants filing a critical
+bug.
+
+#### `rate(scheduler_log_native_append_nanos_total)/rate(scheduler_log_native_append_events)`
+Type: rate ratio of integer counters
+
+#### Description
+This composes two counters to compute a windowed figure for the latency of replicated log writes.
+
+#### Alerting
+A hike in this value suggests disk bandwidth contention.
+
+#### Triage
+Look in scheduler logs for any reported oddness with saving to the replicated log. Also use
+standard tools like `vmstat` and `iotop` to identify whether the disk has become slow or
+over-utilized. We suggest using a dedicated disk for the replicated log to mitigate this.
+
+#### `timed_out_tasks`
+Type: integer counter
+
+#### Description
+Tracks the number of times the scheduler has given up while waiting
+(for `-transient_task_state_timeout`) to hear back about a task that is in a transient state
+(e.g. `ASSIGNED`, `KILLING`), and has moved to `LOST` before rescheduling.
+
+#### Alerting
+This value is currently known to increase occasionally when the scheduler fails over
+([AURORA-740](https://issues.apache.org/jira/browse/AURORA-740)). However, any large spike in this
+value warrants investigation.
+
+#### Triage
+The scheduler will log when it times out a task. You should trace the task ID of the timed out
+task into the master, slave, and/or executors to determine where the message was dropped.
+
+#### `http_500_responses_events`
+Type: integer counter
+
+#### Description
+The total number of HTTP 500 status responses sent by the scheduler. Includes API and asset serving.
+
+#### Alerting
+An increase warrants investigation.
+
+#### Triage
+Look in scheduler logs to identify why the scheduler returned a 500, there should be a stack trace.
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+Resource Isolation and Sizing
+=============================
+
+**NOTE**: Resource Isolation and Sizing is very much a work in progress.
+Both user-facing aspects and how it works under the hood are subject to
+change.
+
+- [Introduction](#introduction)
+- [CPU Isolation](#cpu-isolation)
+- [CPU Sizing](#cpu-sizing)
+- [Memory Isolation](#memory-isolation)
+- [Memory Sizing](#memory-sizing)
+- [Disk Space](#disk-space)
+- [Disk Space Sizing](#disk-space-sizing)
+- [Other Resources](#other-resources)
+
+## Introduction
+
+Aurora is a multi-tenant system; a single software instance runs on a
+server, serving multiple clients/tenants. To share resources among
+tenants, it implements isolation of:
+
+* CPU
+* memory
+* disk space
+
+CPU is a soft limit, and handled differently from memory and disk space.
+Too low a CPU value results in throttling your application and
+slowing it down. Memory and disk space are both hard limits; when your
+application goes over these values, it's killed.
+
+Let's look at each resource type in more detail:
+
+## CPU Isolation
+
+Mesos uses a quota based CPU scheduler (the *Completely Fair Scheduler*)
+to provide consistent and predictable performance. This is effectively
+a guarantee of resources -- you receive at least what you requested, but
+also no more than you've requested.
+
+The scheduler gives applications a CPU quota for every 100 ms interval.
+When an application uses its quota for an interval, it is throttled for
+the rest of the 100 ms. Usage resets for each interval and unused
+quota does not carry over.
+
+For example, an application specifying 4.0 CPU has access to 400 ms of
+CPU time every 100 ms. This CPU quota can be used in different ways,
+depending on the application and available resources. Consider the
+scenarios shown in this diagram.
+
+
+
+* *Scenario A*: the application can use up to 4 cores continuously for
+every 100 ms interval. It is never throttled and starts processing
+new requests immediately.
+
+* *Scenario B* : the application uses up to 8 cores (depending on
+availability) but is throttled after 50 ms. The CPU quota resets at the
+start of each new 100 ms interval.
+
+* *Scenario C* : is like Scenario A, but there is a garbage collection
+event in the second interval that consumes all CPU quota. The
+application throttles for the remaining 75 ms of that interval and
+cannot service requests until the next interval. In this example, the
+garbage collection finished in one interval but, depending on how much
+garbage needs collecting, it may take more than one interval and further
+delay service of requests.
+
+*Technical Note*: Mesos considers logical cores, also known as
+hyperthreading or SMT cores, as the unit of CPU.
+
+## CPU Sizing
+
+To correctly size Aurora-run Mesos tasks, specify a per-shard CPU value
+that lets the task run at its desired performance when at peak load
+distributed across all shards. Include reserve capacity of at least 50%,
+possibly more, depending on how critical your service is (or how
+confident you are about your original estimate : -)), ideally by
+increasing the number of shards to also improve resiliency. When running
+your application, observe its CPU stats over time. If consistently at or
+near your quota during peak load, you should consider increasing either
+per-shard CPU or the number of shards.
+
+## Memory Isolation
+
+Mesos uses dedicated memory allocation. Your application always has
+access to the amount of memory specified in your configuration. The
+application's memory use is defined as the sum of the resident set size
+(RSS) of all processes in a shard. Each shard is considered
+independently.
+
+In other words, say you specified a memory size of 10GB. Each shard
+would receive 10GB of memory. If an individual shard's memory demands
+exceed 10GB, that shard is killed, but the other shards continue
+working.
+
+*Technical note*: Total memory size is not enforced at allocation time,
+so your application can request more than its allocation without getting
+an ENOMEM. However, it will be killed shortly after.
+
+## Memory Sizing
+
+Size for your application's peak requirement. Observe the per-instance
+memory statistics over time, as memory requirements can vary over
+different periods. Remember that if your application exceeds its memory
+value, it will be killed, so you should also add a safety margin of
+around 10-20%. If you have the ability to do so, you may also want to
+put alerts on the per-instance memory.
+
+## Disk Space
+
+Disk space used by your application is defined as the sum of the files'
+disk space in your application's directory, including the `stdout` and
+`stderr` logged from your application. Each shard is considered
+independently. You should use off-node storage for your application's
+data whenever possible.
+
+In other words, say you specified disk space size of 100MB. Each shard
+would receive 100MB of disk space. If an individual shard's disk space
+demands exceed 100MB, that shard is killed, but the other shards
+continue working.
+
+After your application finishes running, its allocated disk space is
+reclaimed. Thus, your job's final action should move any disk content
+that you want to keep, such as logs, to your home file system or other
+less transitory storage. Disk reclamation takes place an undefined
+period after the application finish time; until then, the disk contents
+are still available but you shouldn't count on them being so.
+
+*Technical note* : Disk space is not enforced at write so your
+application can write above its quota without getting an ENOSPC, but it
+will be killed shortly after. This is subject to change.
+
+## Disk Space Sizing
+
+Size for your application's peak requirement. Rotate and discard log
+files as needed to stay within your quota. When running a Java process,
+add the maximum size of the Java heap to your disk space requirement, in
+order to account for an out of memory error dumping the heap
+into the application's sandbox space.
+
+## Other Resources
+
+Other resources, such as network bandwidth, do not have any performance
+guarantees. For some resources, such as memory bandwidth, there are no
+practical sharing methods so some application combinations collocated on
+the same host may cause contention.
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+# Snapshot Performance
+
+Periodically the scheduler writes a full snapshot of its state to the replicated log. To do this
+it needs to hold a global storage write lock while it writes out this data. In large clusters
+this has been observed to take up to 40 seconds. Long pauses can cause issues in the system,
+including delays in scheduling new tasks.
+
+The scheduler has two optimizations to reduce the size of snapshots and thus improve snapshot
+performance: compression and deduplication. Most users will want to enable both compression
+and deduplication.
+
+## Compression
+
+To reduce the size of the snapshot the DEFLATE algorithm can be applied to the serialized bytes
+of the snapshot as they are written to the stream. This reduces the total number of bytes that
+need to be written to the replicated log at the cost of CPU and generally reduces the amount
+of time a snapshot takes. Most users will want to enable both compression and deduplication.
+
+### Enabling Compression
+
+Snapshot compression is enabled via the `-deflate_snapshots` flag. This is the default since
+Aurora 0.5.0. All released versions of Aurora can read both compressed and uncompressed snapshots,
+so there are no backwards compatibility concerns associated with changing this flag.
+
+### Disabling compression
+
+Disable compression by passing `-deflate_snapshots=false`.
+
+## Deduplication
+
+In Aurora 0.6.0 a new snapshot format was introduced. Rather than write one configuration blob
+per Mesos task this format stores each configuration blob once, and each Mesos task with a
+pointer to its blob. This format is not backwards compatible with earlier versions of Aurora.
+
+### Enabling Deduplication
+
+After upgrading Aurora to 0.6.0, enable deduplication with the `-deduplicate_snapshots` flag.
+After the first snapshot the cluster will be using the deduplicated format to write to the
+replicated log. Snapshots are created periodically by the scheduler (according to
+the `-dlog_snapshot_interval` flag). An administrator can also force a snapshot operation with
+`aurora_admin snapshot`.
+
+### Disabling Deduplication
+
+To disable deduplication, for example to rollback to Aurora, restart all of the cluster's
+schedulers with `-deduplicate_snapshots=false` and either wait for a snapshot or force one
+using `aurora_admin snapshot`.
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+Aurora SLA Measurement
+--------------
+
+- [Overview](#overview)
+- [Metric Details](#metric-details)
+ - [Platform Uptime](#platform-uptime)
+ - [Job Uptime](#job-uptime)
+ - [Median Time To Assigned (MTTA)](#median-time-to-assigned-\(mtta\))
+ - [Median Time To Running (MTTR)](#median-time-to-running-\(mttr\))
+- [Limitations](#limitations)
+
+## Overview
+
+The primary goal of the feature is collection and monitoring of Aurora job SLA (Service Level
+Agreements) metrics that defining a contractual relationship between the Aurora/Mesos platform
+and hosted services.
+
+The Aurora SLA feature currently supports stat collection only for service (non-cron)
+production jobs (`"production = True"` in your `.aurora` config).
+
+Counters that track SLA measurements are computed periodically within the scheduler.
+The individual instance metrics are refreshed every minute (configurable via
+`sla_stat_refresh_interval`). The instance counters are subsequently aggregated by
+relevant grouping types before exporting to scheduler `/vars` endpoint (when using `vagrant`
+that would be `http://192.168.33.7:8081/vars`)
+
+## Metric Details
+
+### Platform Uptime
+
+*Aggregate amount of time a job spends in a non-runnable state due to platform unavailability
+or scheduling delays. This metric tracks Aurora/Mesos uptime performance and reflects on any
+system-caused downtime events (tasks LOST or DRAINED). Any user-initiated task kills/restarts
+will not degrade this metric.*
+
+**Collection scope:**
+
+* Per job - `sla_<job_key>_platform_uptime_percent`
+* Per cluster - `sla_cluster_platform_uptime_percent`
+
+**Units:** percent
+
+A fault in the task environment may cause the Aurora/Mesos to have different views on the task state
+or lose track of the task existence. In such cases, the service task is marked as LOST and
+rescheduled by Aurora. For example, this may happen when the task stays in ASSIGNED or STARTING
+for too long or the Mesos slave becomes unhealthy (or disappears completely). The time between
+task entering LOST and its replacement reaching RUNNING state is counted towards platform downtime.
+
+Another example of a platform downtime event is the administrator-requested task rescheduling. This
+happens during planned Mesos slave maintenance when all slave tasks are marked as DRAINED and
+rescheduled elsewhere.
+
+To accurately calculate Platform Uptime, we must separate platform incurred downtime from user
+actions that put a service instance in a non-operational state. It is simpler to isolate
+user-incurred downtime and treat all other downtime as platform incurred.
+
+Currently, a user can cause a healthy service (task) downtime in only two ways: via `killTasks`
+or `restartShards` RPCs. For both, their affected tasks leave an audit state transition trail
+relevant to uptime calculations. By applying a special "SLA meaning" to exposed task state
+transition records, we can build a deterministic downtime trace for every given service instance.
+
+A task going through a state transition carries one of three possible SLA meanings
+(see [SlaAlgorithm.java](../src/main/java/org/apache/aurora/scheduler/sla/SlaAlgorithm.java) for
+sla-to-task-state mapping):
+
+* Task is UP: starts a period where the task is considered to be up and running from the Aurora
+ platform standpoint.
+
+* Task is DOWN: starts a period where the task cannot reach the UP state for some
+ non-user-related reason. Counts towards instance downtime.
+
+* Task is REMOVED from SLA: starts a period where the task is not expected to be UP due to
+ user initiated action or failure. We ignore this period for the uptime calculation purposes.
+
+This metric is recalculated over the last sampling period (last minute) to account for
+any UP/DOWN/REMOVED events. It ignores any UP/DOWN events not immediately adjacent to the
+sampling interval as well as adjacent REMOVED events.
+
+### Job Uptime
+
+*Percentage of the job instances considered to be in RUNNING state for the specified duration
+relative to request time. This is a purely application side metric that is considering aggregate
+uptime of all RUNNING instances. Any user- or platform initiated restarts directly affect
+this metric.*
+
+**Collection scope:** We currently expose job uptime values at 5 pre-defined
+percentiles (50th,75th,90th,95th and 99th):
+
+* `sla_<job_key>_job_uptime_50_00_sec`
+* `sla_<job_key>_job_uptime_75_00_sec`
+* `sla_<job_key>_job_uptime_90_00_sec`
+* `sla_<job_key>_job_uptime_95_00_sec`
+* `sla_<job_key>_job_uptime_99_00_sec`
+
+**Units:** seconds
+You can also get customized real-time stats from aurora client. See `aurora sla -h` for
+more details.
+
+### Median Time To Assigned (MTTA)
+
+*Median time a job spends waiting for its tasks to be assigned to a host. This is a combined
+metric that helps track the dependency of scheduling performance on the requested resources
+(user scope) as well as the internal scheduler bin-packing algorithm efficiency (platform scope).*
+
+**Collection scope:**
+
+* Per job - `sla_<job_key>_mtta_ms`
+* Per cluster - `sla_cluster_mtta_ms`
+* Per instance size (small, medium, large, x-large, xx-large). Size are defined in:
+[ResourceAggregates.java](../src/main/java/org/apache/aurora/scheduler/base/ResourceAggregates.java)
+ * By CPU:
+ * `sla_cpu_small_mtta_ms`
+ * `sla_cpu_medium_mtta_ms`
+ * `sla_cpu_large_mtta_ms`
+ * `sla_cpu_xlarge_mtta_ms`
+ * `sla_cpu_xxlarge_mtta_ms`
+ * By RAM:
+ * `sla_ram_small_mtta_ms`
+ * `sla_ram_medium_mtta_ms`
+ * `sla_ram_large_mtta_ms`
+ * `sla_ram_xlarge_mtta_ms`
+ * `sla_ram_xxlarge_mtta_ms`
+ * By DISK:
+ * `sla_disk_small_mtta_ms`
+ * `sla_disk_medium_mtta_ms`
+ * `sla_disk_large_mtta_ms`
+ * `sla_disk_xlarge_mtta_ms`
+ * `sla_disk_xxlarge_mtta_ms`
+
+**Units:** milliseconds
+
+MTTA only considers instances that have already reached ASSIGNED state and ignores those
+that are still PENDING. This ensures straggler instances (e.g. with unreasonable resource
+constraints) do not affect metric curves.
+
+### Median Time To Running (MTTR)
+
+*Median time a job waits for its tasks to reach RUNNING state. This is a comprehensive metric
+reflecting on the overall time it takes for the Aurora/Mesos to start executing user content.*
+
+**Collection scope:**
+
+* Per job - `sla_<job_key>_mttr_ms`
+* Per cluster - `sla_cluster_mttr_ms`
+* Per instance size (small, medium, large, x-large, xx-large). Size are defined in:
+[ResourceAggregates.java](../src/main/java/org/apache/aurora/scheduler/base/ResourceAggregates.java)
+ * By CPU:
+ * `sla_cpu_small_mttr_ms`
+ * `sla_cpu_medium_mttr_ms`
+ * `sla_cpu_large_mttr_ms`
+ * `sla_cpu_xlarge_mttr_ms`
+ * `sla_cpu_xxlarge_mttr_ms`
+ * By RAM:
+ * `sla_ram_small_mttr_ms`
+ * `sla_ram_medium_mttr_ms`
+ * `sla_ram_large_mttr_ms`
+ * `sla_ram_xlarge_mttr_ms`
+ * `sla_ram_xxlarge_mttr_ms`
+ * By DISK:
+ * `sla_disk_small_mttr_ms`
+ * `sla_disk_medium_mttr_ms`
+ * `sla_disk_large_mttr_ms`
+ * `sla_disk_xlarge_mttr_ms`
+ * `sla_disk_xxlarge_mttr_ms`
+
+**Units:** milliseconds
+
+MTTR only considers instances in RUNNING state. This ensures straggler instances (e.g. with
+unreasonable resource constraints) do not affect metric curves.
+
+## Limitations
+
+* The availability of Aurora SLA metrics is bound by the scheduler availability.
+
+* All metrics are calculated at a pre-defined interval (currently set at 1 minute).
+ Scheduler restarts may result in missed collections.
\ No newline at end of file
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+# Storage Configuration And Maintenance
+
+- [Overview](#overview)
+- [Scheduler storage configuration flags](#scheduler-storage-configuration-flags)
+ - [Mesos replicated log configuration flags](#mesos-replicated-log-configuration-flags)
+ - [-native_log_quorum_size](#-native_log_quorum_size)
+ - [-native_log_file_path](#-native_log_file_path)
+ - [-native_log_zk_group_path](#-native_log_zk_group_path)
+ - [Backup configuration flags](#backup-configuration-flags)
+ - [-backup_interval](#-backup_interval)
+ - [-backup_dir](#-backup_dir)
+ - [-max_saved_backups](#-max_saved_backups)
+- [Recovering from a scheduler backup](#recovering-from-a-scheduler-backup)
+ - [Summary](#summary)
+ - [Preparation](#preparation)
+ - [Cleanup and re-initialize Mesos replicated log](#cleanup-and-re-initialize-mesos-replicated-log)
+ - [Restore from backup](#restore-from-backup)
+ - [Cleanup](#cleanup)
+
+## Overview
+
+This document summarizes Aurora storage configuration and maintenance details and is
+intended for use by anyone deploying and/or maintaining Aurora.
+
+For a high level overview of the Aurora storage architecture refer to [this document](/documentation/latest/storage/).
+
+## Scheduler storage configuration flags
+
+Below is a summary of scheduler storage configuration flags that either don't have default values
+or require attention before deploying in a production environment.
+
+### Mesos replicated log configuration flags
+
+#### -native_log_quorum_size
+Defines the Mesos replicated log quorum size. See
+[the replicated log configuration document](deploying-aurora-scheduler.md#replicated-log-configuration)
+on how to choose the right value.
+
+#### -native_log_file_path
+Location of the Mesos replicated log files. Consider allocating a dedicated disk (preferably SSD)
+for Mesos replicated log files to ensure optimal storage performance.
+
+#### -native_log_zk_group_path
+ZooKeeper path used for Mesos replicated log quorum discovery.
+
+See [code](../src/main/java/org/apache/aurora/scheduler/log/mesos/MesosLogStreamModule.java) for
+other available Mesos replicated log configuration options and default values.
+
+### Backup configuration flags
+
+Configuration options for the Aurora scheduler backup manager.
+
+#### -backup_interval
+The interval on which the scheduler writes local storage backups. The default is every hour.
+
+#### -backup_dir
+Directory to write backups to.
+
+#### -max_saved_backups
+Maximum number of backups to retain before deleting the oldest backup(s).
+
+## Recovering from a scheduler backup
+
+- [Overview](#overview)
+- [Preparation](#preparation)
+- [Assess Mesos replicated log damage](#assess-mesos-replicated-log-damage)
+- [Restore from backup](#restore-from-backup)
+- [Cleanup](#cleanup)
+
+**Be sure to read the entire page before attempting to restore from a backup, as it may have
+unintended consequences.**
+
+### Summary
+
+The restoration procedure replaces the existing (possibly corrupted) Mesos replicated log with an
+earlier, backed up, version and requires all schedulers to be taken down temporarily while
+restoring. Once completed, the scheduler state resets to what it was when the backup was created.
+This means any jobs/tasks created or updated after the backup are unknown to the scheduler and will
+be killed shortly after the cluster restarts. All other tasks continue operating as normal.
+
+Usually, it is a bad idea to restore a backup that is not extremely recent (i.e. older than a few
+hours). This is because the scheduler will expect the cluster to look exactly as the backup does,
+so any tasks that have been rescheduled since the backup was taken will be killed.
+
+### Preparation
+
+Follow these steps to prepare the cluster for restoring from a backup:
+
+* Stop all scheduler instances
+
+* Consider blocking external traffic on a port defined in `-http_port` for all schedulers to
+prevent users from interacting with the scheduler during the restoration process. This will help
+troubleshooting by reducing the scheduler log noise and prevent users from making changes that will
+be erased after the backup snapshot is restored
+
+* Next steps are required to put scheduler into a partially disabled state where it would still be
+able to accept storage recovery requests but unable to schedule or change task states. This may be
+accomplished by updating the following scheduler configuration options:
+ * Set `-mesos_master_address` to a non-existent zk address. This will prevent scheduler from
+ registering with Mesos. E.g.: `-mesos_master_address=zk://localhost:2181`
+ * `-max_registration_delay` - set to sufficiently long interval to prevent registration timeout
+ and as a result scheduler suicide. E.g: `-max_registration_delay=360min`
+ * Make sure `-gc_executor_path` option is not set to prevent accidental task GC. This is
+ important as scheduler will attempt to reconcile the cluster state and will kill all tasks when
+ restarted with an empty Mesos replicated log.
+
+* Restart all schedulers
+
+### Cleanup and re-initialize Mesos replicated log
+
+Get rid of the corrupted files and re-initialize Mesos replicate log:
+
+* Stop schedulers
+* Delete all files under `-native_log_file_path` on all schedulers
+* Initialize Mesos replica's log file: `mesos-log initialize <-native_log_file_path>`
+* Restart schedulers
+
+### Restore from backup
+
+At this point the scheduler is ready to rehydrate from the backup:
+
+* Identify the leading scheduler by:
+ * running `aurora_admin get_scheduler <cluster>` - if scheduler is responsive
+ * examining scheduler logs
+ * or examining Zookeeper registration under the path defined by `-zk_endpoints`
+ and `-serverset_path`
+
+* Locate the desired backup file, copy it to the leading scheduler and stage recovery by running
+the following command on a leader
+`aurora_admin scheduler_stage_recovery <cluster> scheduler-backup-<yyyy-MM-dd-HH-mm>`
+
+* At this point, the recovery snapshot is staged and available for manual verification/modification
+via `aurora_admin scheduler_print_recovery_tasks` and `scheduler_delete_recovery_tasks` commands.
+See `aurora_admin help <command>` for usage details.
+
+* Commit recovery. This instructs the scheduler to overwrite the existing Mesosreplicated log with
+the provided backup snapshot and initiate a mandatory failover
+`aurora_admin scheduler_commit_recovery <cluster>`
+
+### Cleanup
+Undo any modification done during [Preparation](#preparation) sequence.
+
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diff --git a/source/documentation/latest/storage.md b/source/documentation/latest/storage.md
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+#Aurora Scheduler Storage
+
+- [Overview](#overview)
+- [Reads, writes, modifications](#reads-writes-modifications)
+ - [Read lifecycle](#read-lifecycle)
+ - [Write lifecycle](#write-lifecycle)
+- [Atomicity, consistency and isolation](#atomicity-consistency-and-isolation)
+- [Population on restart](#population-on-restart)
+
+## Overview
+
+Aurora scheduler maintains data that need to be persisted to survive failovers and restarts.
+For example:
+
+* Task configurations and scheduled task instances
+* Job update configurations and update progress
+* Production resource quotas
+* Mesos resource offer host attributes
+
+Aurora solves its persistence needs by leveraging the Mesos implementation of a Paxos replicated
+log [[1]](https://ramcloud.stanford.edu/~ongaro/userstudy/paxos.pdf)
+[[2]](http://en.wikipedia.org/wiki/State_machine_replication) with a key-value
+[LevelDB](https://github.com/google/leveldb) storage as persistence media.
+
+Conceptually, it can be represented by the following major components:
+
+* Volatile storage: in-memory cache of all available data. Implemented via in-memory
+[H2 Database](http://www.h2database.com/html/main.html) and accessed via
+[MyBatis](http://mybatis.github.io/mybatis-3/).
+* Log manager: interface between Aurora storage and Mesos replicated log. The default schema format
+is [thrift](https://github.com/apache/thrift). Data is stored in serialized binary form.
+* Snapshot manager: all data is periodically persisted in Mesos replicated log in a single snapshot.
+This helps establishing periodic recovery checkpoints and speeds up volatile storage recovery on
+restart.
+* Backup manager: as a precaution, snapshots are periodically written out into backup files.
+This solves a [disaster recovery problem](storage-config.md#recovering-from-a-scheduler-backup)
+in case of a complete loss or corruption of Mesos log files.
+
+
+
+## Reads, writes, modifications
+
+All services in Aurora access data via a set of predefined store interfaces (aka stores) logically
+grouped by the type of data they serve. Every interface defines a specific set of operations allowed
+on the data thus abstracting out the storage access and the actual persistence implementation. The
+latter is especially important in view of a general immutability of persisted data. With the Mesos
+replicated log as the underlying persistence solution, data can be read and written easily but not
+modified. All modifications are simulated by saving new versions of modified objects. This feature
+and general performance considerations justify the existence of the volatile in-memory store.
+
+### Read lifecycle
+
+There are two types of reads available in Aurora: consistent and weakly-consistent. The difference
+is explained [below](#atomicity-and-isolation).
+
+All reads are served from the volatile storage making reads generally cheap storage operations
+from the performance standpoint. The majority of the volatile stores are represented by the
+in-memory H2 database. This allows for rich schema definitions, queries and relationships that
+key-value storage is unable to match.
+
+### Write lifecycle
+
+Writes are more involved operations since in addition to updating the volatile store data has to be
+appended to the replicated log. Data is not available for reads until fully ack-ed by both
+replicated log and volatile storage.
+
+## Atomicity, consistency and isolation
+
+Aurora uses [write-ahead logging](http://en.wikipedia.org/wiki/Write-ahead_logging) to ensure
+consistency between replicated and volatile storage. In Aurora, data is first written into the
+replicated log and only then updated in the volatile store.
+
+Aurora storage uses read-write locks to serialize data mutations and provide consistent view of the
+available data. The available `Storage` interface exposes 3 major types of operations:
+* `consistentRead` - access is locked using reader's lock and provides consistent view on read
+* `weaklyConsistentRead` - access is lock-less. Delivers best contention performance but may result
+in stale reads
+* `write` - access is fully serialized by using writer's lock. Operation success requires both
+volatile and replicated writes to succeed.
+
+The consistency of the volatile store is enforced via H2 transactional isolation.
+
+## Population on restart
+
+Any time a scheduler restarts, it restores its volatile state from the most recent position recorded
+in the replicated log by restoring the snapshot and replaying individual log entries on top to fully
+recover the state up to the last write.
+
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+# Generating test resources
+
+## Background
+The Aurora source repository and distributions contain several
+[binary files](../src/test/resources/org/apache/thermos/root/checkpoints) to
+qualify the backwards-compatibility of thermos with checkpoint data. Since
+thermos persists state to disk, to be read by other components (the GC executor
+and the thermos observer), it is important that we have tests that prevent
+regressions affecting the ability to parse previously-written data.
+
+## Generating test files
+The files included represent persisted checkpoints that exercise different
+features of thermos. The existing files should not be modified unless
+we are accepting backwards incompatibility, such as with a major release.
+
+It is not practical to write source code to generate these files on the fly,
+as source would be vulnerable to drift (e.g. due to refactoring) in ways
+that would undermine the goal of ensuring backwards compatibility.
+
+The most common reason to add a new checkpoint file would be to provide
+coverage for new thermos features that alter the data format. This is
+accomplished by writing and running a
+[job configuration](/documentation/latest/configuration-reference/) that exercises the feature, and
+copying the checkpoint file from the sandbox directory, by default this is
+`/var/run/thermos/checkpoints/<aurora task id>`.
[09/18] incubator-aurora-website git commit: Initial move of website
over to git
Posted by jf...@apache.org.
http://git-wip-us.apache.org/repos/asf/incubator-aurora-website/blob/c43a3a2d/publish/documentation/latest/tutorial/index.html
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diff --git a/publish/documentation/latest/tutorial/index.html b/publish/documentation/latest/tutorial/index.html
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@@ -0,0 +1,327 @@
+<!DOCTYPE html>
+<html lang="en">
+ <head>
+ <meta charset="utf-8">
+ <meta name="viewport" content="width=device-width, initial-scale=1">
+ <title>Apache Aurora</title>
+ <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css">
+ <link href="/assets/css/main.css" rel="stylesheet">
+ <!-- Analytics -->
+ <script type="text/javascript">
+ var _gaq = _gaq || [];
+ _gaq.push(['_setAccount', 'UA-45879646-1']);
+ _gaq.push(['_setDomainName', 'apache.org']);
+ _gaq.push(['_trackPageview']);
+
+ (function() {
+ var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
+ ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
+ var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
+ })();
+ </script>
+ </head>
+ <body>
+
+ <div class="container-fluid section-header">
+ <div class="container">
+ <div class="nav nav-bar">
+ <a href="/"><img src="/assets/img/aurora_logo_white_bkg.svg" width="300" alt="Transparent Apache Aurora logo with dark background"/></a>
+ <ul class="nav navbar-nav navbar-right">
+ <li><a href="/documentation/latest/">Documentation</a></li>
+ <li><a href="/community/">Community</a></li>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/blog/">Blog</a></li>
+ </ul>
+ </div>
+ </div>
+</div>
+ <div class="container-fluid">
+ <div class="container content">
+ <h2 id="aurora-tutorial">Aurora Tutorial</h2>
+
+<ul>
+<li><a href="#introduction">Introduction</a></li>
+<li><a href="#setup-install-aurora">Setup: Install Aurora</a></li>
+<li><a href="#the-script">The Script</a></li>
+<li><a href="#aurora-configuration">Aurora Configuration</a></li>
+<li><a href="#whats-going-on-in-that-configuration-file">What’s Going On In That Configuration File?</a></li>
+<li><a href="#creating-the-job">Creating the Job</a></li>
+<li><a href="#watching-the-job-run">Watching the Job Run</a></li>
+<li><a href="#cleanup">Cleanup</a></li>
+<li><a href="#next-steps">Next Steps</a></li>
+</ul>
+
+<h2 id="introduction">Introduction</h2>
+
+<p>This tutorial shows how to use the Aurora scheduler to run (and
+“<code>printf-debug</code>”) a hello world program on Mesos. The operational
+hierarchy is:</p>
+
+<ul>
+<li>Aurora manages and schedules jobs for Mesos to run.</li>
+<li>Mesos manages the individual tasks that make up a job.</li>
+<li>Thermos manages the individual processes that make up a task.</li>
+</ul>
+
+<p>This is the recommended first Aurora users document to read to start
+getting up to speed on the system.</p>
+
+<p>To get help, email questions to the Aurora Developer List,
+<a href="mailto:dev@aurora.incubator.apache.org">dev@aurora.incubator.apache.org</a></p>
+
+<h2 id="setup:-install-aurora">Setup: Install Aurora</h2>
+
+<p>You use the Aurora client and web UI to interact with Aurora jobs. To
+install it locally, see <a href="/documentation/latest/vagrant/">vagrant.md</a>. The remainder of this
+Tutorial assumes you are running Aurora using Vagrant. Unless otherwise stated,
+all commands are to be run from the root of the aurora repository clone.</p>
+
+<h2 id="the-script">The Script</h2>
+
+<p>Our “hello world” application is a simple Python script that loops
+forever, displaying the time every few seconds. Copy the code below and
+put it in a file named <code>hello_world.py</code> in the root of your Aurora repository clone (Note:
+this directory is the same as <code>/vagrant</code> inside the Vagrant VMs).</p>
+
+<p>The script has an intentional bug, which we will explain later on.</p>
+
+<!-- NOTE: If you are changing this file, be sure to also update examples/vagrant/test_tutorial.sh.
+-->
+<pre class="highlight python"><span class="kn">import</span> <span class="nn">sys</span>
+<span class="kn">import</span> <span class="nn">time</span>
+
+<span class="k">def</span> <span class="nf">main</span><span class="p">(</span><span class="n">argv</span><span class="p">):</span>
+ <span class="n">SLEEP_DELAY</span> <span class="o">=</span> <span class="mi">10</span>
+ <span class="c"># Python ninjas - ignore this blatant bug.</span>
+ <span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="n">xrang</span><span class="p">(</span><span class="mi">100</span><span class="p">):</span>
+ <span class="k">print</span><span class="p">(</span><span class="s">"Hello world! The time is now: </span><span class="si">%</span><span class="s">s. Sleeping for </span><span class="si">%</span><span class="s">d secs"</span> <span class="o">%</span> <span class="p">(</span>
+ <span class="n">time</span><span class="o">.</span><span class="n">asctime</span><span class="p">(),</span> <span class="n">SLEEP_DELAY</span><span class="p">))</span>
+ <span class="n">sys</span><span class="o">.</span><span class="n">stdout</span><span class="o">.</span><span class="n">flush</span><span class="p">()</span>
+ <span class="n">time</span><span class="o">.</span><span class="n">sleep</span><span class="p">(</span><span class="n">SLEEP_DELAY</span><span class="p">)</span>
+
+<span class="k">if</span> <span class="n">__name__</span> <span class="o">==</span> <span class="s">"__main__"</span><span class="p">:</span>
+ <span class="n">main</span><span class="p">(</span><span class="n">sys</span><span class="o">.</span><span class="n">argv</span><span class="p">)</span>
+</pre>
+<h2 id="aurora-configuration">Aurora Configuration</h2>
+
+<p>Once we have our script/program, we need to create a <em>configuration
+file</em> that tells Aurora how to manage and launch our Job. Save the below
+code in the file <code>hello_world.aurora</code>.</p>
+
+<!-- NOTE: If you are changing this file, be sure to also update examples/vagrant/test_tutorial.sh.
+-->
+<pre class="highlight python"><span class="n">pkg_path</span> <span class="o">=</span> <span class="s">'/vagrant/hello_world.py'</span>
+
+<span class="c"># we use a trick here to make the configuration change with</span>
+<span class="c"># the contents of the file, for simplicity. in a normal setting, packages would be</span>
+<span class="c"># versioned, and the version number would be changed in the configuration.</span>
+<span class="kn">import</span> <span class="nn">hashlib</span>
+<span class="k">with</span> <span class="nb">open</span><span class="p">(</span><span class="n">pkg_path</span><span class="p">,</span> <span class="s">'rb'</span><span class="p">)</span> <span class="k">as</span> <span class="n">f</span><span class="p">:</span>
+ <span class="n">pkg_checksum</span> <span class="o">=</span> <span class="nb">hash</span><span class="n">lib</span><span class="o">.</span><span class="n">md5</span><span class="p">(</span><span class="n">f</span><span class="o">.</span><span class="n">read</span><span class="p">())</span><span class="o">.</span><span class="nb">hex</span><span class="n">digest</span><span class="p">()</span>
+
+<span class="c"># copy hello_world.py into the local sandbox</span>
+<span class="n">install</span> <span class="o">=</span> <span class="n">Process</span><span class="p">(</span>
+ <span class="n">name</span> <span class="o">=</span> <span class="s">'fetch_package'</span><span class="p">,</span>
+ <span class="n">cmdline</span> <span class="o">=</span> <span class="s">'cp </span><span class="si">%</span><span class="s">s . && echo </span><span class="si">%</span><span class="s">s && chmod +x hello_world.py'</span> <span class="o">%</span> <span class="p">(</span><span class="n">pkg_path</span><span class="p">,</span> <span class="n">pkg_checksum</span><span class="p">))</span>
+
+<span class="c"># run the script</span>
+<span class="n">hello_world</span> <span class="o">=</span> <span class="n">Process</span><span class="p">(</span>
+ <span class="n">name</span> <span class="o">=</span> <span class="s">'hello_world'</span><span class="p">,</span>
+ <span class="n">cmdline</span> <span class="o">=</span> <span class="s">'python hello_world.py'</span><span class="p">)</span>
+
+<span class="c"># describe the task</span>
+<span class="n">hello_world_task</span> <span class="o">=</span> <span class="n">SequentialTask</span><span class="p">(</span>
+ <span class="n">processes</span> <span class="o">=</span> <span class="p">[</span><span class="n">install</span><span class="p">,</span> <span class="n">hello_world</span><span class="p">],</span>
+ <span class="n">resources</span> <span class="o">=</span> <span class="n">Resources</span><span class="p">(</span><span class="n">cpu</span> <span class="o">=</span> <span class="mi">1</span><span class="p">,</span> <span class="n">ram</span> <span class="o">=</span> <span class="mi">1</span><span class="o">*</span><span class="n">MB</span><span class="p">,</span> <span class="n">disk</span><span class="o">=</span><span class="mi">8</span><span class="o">*</span><span class="n">MB</span><span class="p">))</span>
+
+<span class="n">jobs</span> <span class="o">=</span> <span class="p">[</span>
+ <span class="n">Service</span><span class="p">(</span><span class="n">cluster</span> <span class="o">=</span> <span class="s">'devcluster'</span><span class="p">,</span>
+ <span class="n">environment</span> <span class="o">=</span> <span class="s">'devel'</span><span class="p">,</span>
+ <span class="n">role</span> <span class="o">=</span> <span class="s">'www-data'</span><span class="p">,</span>
+ <span class="n">name</span> <span class="o">=</span> <span class="s">'hello_world'</span><span class="p">,</span>
+ <span class="n">task</span> <span class="o">=</span> <span class="n">hello_world_task</span><span class="p">)</span>
+<span class="p">]</span>
+</pre>
+<p>For more about Aurora configuration files, see the <a href="/documentation/latest/configuration-tutorial/">Configuration
+Tutorial</a> and the <a href="/documentation/latest/configuration-reference/">Aurora + Thermos
+Reference</a> (preferably after finishing this
+tutorial).</p>
+
+<h2 id="what's-going-on-in-that-configuration-file?">What’s Going On In That Configuration File?</h2>
+
+<p>More than you might think.</p>
+
+<ol>
+<li><p>From a “big picture” viewpoint, it first defines two
+Processes. Then it defines a Task that runs the two Processes in the
+order specified in the Task definition, as well as specifying what
+computational and memory resources are available for them. Finally,
+it defines a Job that will schedule the Task on available and suitable
+machines. This Job is the sole member of a list of Jobs; you can
+specify more than one Job in a config file.</p></li>
+<li><p>At the Process level, it specifies how to get your code into the
+local sandbox in which it will run. It then specifies how the code is
+actually run once the second Process starts.</p></li>
+</ol>
+
+<h2 id="creating-the-job">Creating the Job</h2>
+
+<p>We’re ready to launch our job! To do so, we use the Aurora Client to
+issue a Job creation request to the Aurora scheduler.</p>
+
+<p>Many Aurora Client commands take a <em>job key</em> argument, which uniquely
+identifies a Job. A job key consists of four parts, each separated by a
+“/”. The four parts are <code><cluster>/<role>/<environment>/<jobname></code>
+in that order. When comparing two job keys, if any of the
+four parts is different from its counterpart in the other key, then the
+two job keys identify two separate jobs. If all four values are
+identical, the job keys identify the same job.</p>
+
+<p><code>/etc/aurora/clusters.json</code> within the Aurora scheduler has the available
+cluster names. For Vagrant, from the top-level of your Aurora repository clone,
+do:</p>
+<pre class="highlight text">$ vagrant ssh
+</pre>
+<p>Followed by:</p>
+<pre class="highlight text">vagrant@precise64:~$ cat /etc/aurora/clusters.json
+</pre>
+<p>You’ll see something like:</p>
+<pre class="highlight javascript"><span class="p">[{</span>
+ <span class="s2">"name"</span><span class="err">:</span> <span class="s2">"devcluster"</span><span class="p">,</span>
+ <span class="s2">"zk"</span><span class="err">:</span> <span class="s2">"192.168.33.7"</span><span class="p">,</span>
+ <span class="s2">"scheduler_zk_path"</span><span class="err">:</span> <span class="s2">"/aurora/scheduler"</span><span class="p">,</span>
+ <span class="s2">"auth_mechanism"</span><span class="err">:</span> <span class="s2">"UNAUTHENTICATED"</span>
+<span class="p">}]</span>
+</pre>
+<p>Use a <code>name</code> value for your job key’s cluster value.</p>
+
+<p>Role names are user accounts existing on the slave machines. If you don’t know what accounts
+are available, contact your sysadmin.</p>
+
+<p>Environment names are namespaces; you can count on <code>prod</code>, <code>devel</code> and <code>test</code> existing.</p>
+
+<p>The Aurora Client command that actually runs our Job is <code>aurora create</code>. It creates a Job as
+specified by its job key and configuration file arguments and runs it.</p>
+<pre class="highlight text">aurora create <cluster>/<role>/<environment>/<jobname> <config_file>
+</pre>
+<p>Or for our example:</p>
+<pre class="highlight text">aurora create devcluster/www-data/devel/hello_world /vagrant/hello_world.aurora
+</pre>
+<p>This returns:</p>
+<pre class="highlight text">$ vagrant ssh
+Welcome to Ubuntu 12.04 LTS (GNU/Linux 3.2.0-23-generic x86_64)
+
+ * Documentation: https://help.ubuntu.com/
+Welcome to your Vagrant-built virtual machine.
+Last login: Fri Jan 3 02:18:55 2014 from 10.0.2.2
+vagrant@precise64:~$ aurora create devcluster/www-data/devel/hello_world \
+ /vagrant/hello_world.aurora
+ INFO] Creating job hello_world
+ INFO] Response from scheduler: OK (message: 1 new tasks pending for job
+ www-data/devel/hello_world)
+ INFO] Job url: http://precise64:8081/scheduler/www-data/devel/hello_world
+</pre>
+<h2 id="watching-the-job-run">Watching the Job Run</h2>
+
+<p>Now that our job is running, let’s see what it’s doing. Access the
+scheduler web interface at <code>http://$scheduler_hostname:$scheduler_port/scheduler</code>
+Or when using <code>vagrant</code>, <code>http://192.168.33.7:8081/scheduler</code>
+First we see what Jobs are scheduled:</p>
+
+<p><img alt="Scheduled Jobs" src="../images/ScheduledJobs.png" /></p>
+
+<p>Click on your user name, which in this case was <code>www-data</code>, and we see the Jobs associated
+with that role:</p>
+
+<p><img alt="Role Jobs" src="../images/RoleJobs.png" /></p>
+
+<p>If you click on your <code>hello_world</code> Job, you’ll see:</p>
+
+<p><img alt="hello_world Job" src="../images/HelloWorldJob.png" /></p>
+
+<p>Oops, looks like our first job didn’t quite work! The task failed, so we have
+to figure out what went wrong.</p>
+
+<p>Access the page for our Task by clicking on its host.</p>
+
+<p><img alt="Task page" src="../images/TaskBreakdown.png" /></p>
+
+<p>Once there, we see that the
+<code>hello_world</code> process failed. The Task page captures the standard error and
+standard output streams and makes them available. Clicking through
+to <code>stderr</code> on the failed <code>hello_world</code> process, we see what happened.</p>
+
+<p><img alt="stderr page" src="../images/stderr.png" /></p>
+
+<p>It looks like we made a typo in our Python script. We wanted <code>xrange</code>,
+not <code>xrang</code>. Edit the <code>hello_world.py</code> script to use the correct function and
+we will try again.</p>
+<pre class="highlight text">aurora update devcluster/www-data/devel/hello_world /vagrant/hello_world.aurora
+</pre>
+<p>This time, the task comes up, we inspect the page, and see that the
+<code>hello_world</code> process is running.</p>
+
+<p><img alt="Running Task page" src="../images/runningtask.png" /></p>
+
+<p>We then inspect the output by clicking on <code>stdout</code> and see our process'
+output:</p>
+
+<p><img alt="stdout page" src="../images/stdout.png" /></p>
+
+<h2 id="cleanup">Cleanup</h2>
+
+<p>Now that we’re done, we kill the job using the Aurora client:</p>
+<pre class="highlight text">vagrant@precise64:~$ aurora killall devcluster/www-data/devel/hello_world
+ INFO] Killing tasks for job: devcluster/www-data/devel/hello_world
+ INFO] Response from scheduler: OK (message: Tasks killed.)
+ INFO] Job url: http://precise64:8081/scheduler/www-data/devel/hello_world
+vagrant@precise64:~$
+</pre>
+<p>The job page now shows the <code>hello_world</code> tasks as completed.</p>
+
+<p><img alt="Killed Task page" src="../images/killedtask.png" /></p>
+
+<h2 id="next-steps">Next Steps</h2>
+
+<p>Now that you’ve finished this Tutorial, you should read or do the following:</p>
+
+<ul>
+<li><a href="/documentation/latest/configuration-tutorial/">The Aurora Configuration Tutorial</a>, which provides more examples
+and best practices for writing Aurora configurations. You should also look at
+the <a href="/documentation/latest/configuration-reference/">Aurora + Thermos Configuration Reference</a>.</li>
+<li>The <a href="/documentation/latest/user-guide/">Aurora User Guide</a> provides an overview of how Aurora, Mesos, and
+Thermos work “under the hood”.</li>
+<li>Explore the Aurora Client - use the <code>aurora help</code> subcommand, and read the
+<a href="/documentation/latest/client-commands/">Aurora Client Commands</a> document.</li>
+</ul>
+
+ </div>
+ </div>
+
+ <div class="container-fluid section-footer buffer">
+ <div class="container">
+ <div class="row">
+ <div class="col-md-2 col-md-offset-1"><h3>Quick Links</h3>
+ <ul>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/community/">Mailing Lists</a></li>
+ <li><a href="http://issues.apache.org/jira/browse/AURORA">Issue Tracking</a></li>
+ <li><a href="/documentation/latest/contributing/">How To Contribute</a></li>
+ </ul>
+ </div>
+ <div class="col-md-2"><h3>The ASF</h3>
+ <ul>
+ <li><a href="http://www.apache.org/licenses/">License</a></li>
+ <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+ <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
+ <li><a href="http://www.apache.org/security/">Security</a></li>
+ </ul>
+ </div>
+ <div class="col-md-6">
+ <p class="disclaimer">Apache Aurora is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.</p>
+ <p class="disclaimer">Copyright 2014 <a href="http://www.apache.org/">Apache Software Foundation</a>. Licensed under the <a href="http://www.apache.org/licenses/">Apache License v2.0</a>. The <a href="https://www.flickr.com/photos/trondk/12706051375/">Aurora Borealis IX photo</a> displayed on the homepage is available under a <a href="https://creativecommons.org/licenses/by-nc-nd/2.0/">Creative Commons BY-NC-ND 2.0 license</a>. Apache, Apache Aurora, and the Apache feather logo are trademarks of The Apache Software Foundation.</p>
+ </div>
+ </div>
+ </div>
+ </body>
+</html>
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+<!DOCTYPE html>
+<html lang="en">
+ <head>
+ <meta charset="utf-8">
+ <meta name="viewport" content="width=device-width, initial-scale=1">
+ <title>Apache Aurora</title>
+ <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css">
+ <link href="/assets/css/main.css" rel="stylesheet">
+ <!-- Analytics -->
+ <script type="text/javascript">
+ var _gaq = _gaq || [];
+ _gaq.push(['_setAccount', 'UA-45879646-1']);
+ _gaq.push(['_setDomainName', 'apache.org']);
+ _gaq.push(['_trackPageview']);
+
+ (function() {
+ var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
+ ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
+ var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
+ })();
+ </script>
+ </head>
+ <body>
+
+ <div class="container-fluid section-header">
+ <div class="container">
+ <div class="nav nav-bar">
+ <a href="/"><img src="/assets/img/aurora_logo_white_bkg.svg" width="300" alt="Transparent Apache Aurora logo with dark background"/></a>
+ <ul class="nav navbar-nav navbar-right">
+ <li><a href="/documentation/latest/">Documentation</a></li>
+ <li><a href="/community/">Community</a></li>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/blog/">Blog</a></li>
+ </ul>
+ </div>
+ </div>
+</div>
+ <div class="container-fluid">
+ <div class="container content">
+ <h2 id="aurora-user-guide">Aurora User Guide</h2>
+
+<ul>
+<li><a href="#user-content-overview">Overview</a></li>
+<li><a href="#user-content-job-lifecycle">Job Lifecycle</a>
+
+<ul>
+<li><a href="#user-content-life-of-a-task">Life Of A Task</a></li>
+<li><a href="#user-content-pending-to-running-states">PENDING to RUNNING states</a></li>
+<li><a href="#user-content-task-updates">Task Updates</a></li>
+<li><a href="#user-content-http-health-checking-and-graceful-shutdown">HTTP Health Checking and Graceful Shutdown</a>
+
+<ul>
+<li><a href="#user-content-tearing-a-task-down">Tearing a task down</a></li>
+</ul></li>
+<li><a href="#user-content-giving-priority-to-production-tasks-preempting">Giving Priority to Production Tasks: PREEMPTING</a></li>
+<li><a href="#user-content-natural-termination-finished-failed">Natural Termination: FINISHED, FAILED</a></li>
+<li><a href="#user-content-forceful-termination-killing-restarting">Forceful Termination: KILLING, RESTARTING</a></li>
+</ul></li>
+<li><a href="#user-content-service-discovery">Service Discovery</a></li>
+<li><a href="#user-content-configuration">Configuration</a></li>
+<li><a href="#user-content-creating-jobs">Creating Jobs</a></li>
+<li><a href="#user-content-interacting-with-jobs">Interacting With Jobs</a></li>
+</ul>
+
+<h2 id="overview">Overview</h2>
+
+<p>This document gives an overview of how Aurora works under the hood.
+It assumes you’ve already worked through the “hello world” example
+job in the <a href="/documentation/latest/tutorial/">Aurora Tutorial</a>. Specifics of how to use Aurora are <strong>not</strong>
+ given here, but pointers to documentation about how to use Aurora are
+provided.</p>
+
+<p>Aurora is a Mesos framework used to schedule <em>jobs</em> onto Mesos. Mesos
+cares about individual <em>tasks</em>, but typical jobs consist of dozens or
+hundreds of task replicas. Aurora provides a layer on top of Mesos with
+its <code>Job</code> abstraction. An Aurora <code>Job</code> consists of a task template and
+instructions for creating near-identical replicas of that task (modulo
+things like “instance id” or specific port numbers which may differ from
+machine to machine).</p>
+
+<p>How many tasks make up a Job is complicated. On a basic level, a Job consists of
+one task template and instructions for creating near-idential replicas of that task
+(otherwise referred to as “instances” or “shards”).</p>
+
+<p>However, since Jobs can be updated on the fly, a single Job identifier or <em>job key</em>
+can have multiple job configurations associated with it.</p>
+
+<p>For example, consider when I have a Job with 4 instances that each
+request 1 core of cpu, 1 GB of RAM, and 1 GB of disk space as specified
+in the configuration file <code>hello_world.aurora</code>. I want to
+update it so it requests 2 GB of RAM instead of 1. I create a new
+configuration file to do that called <code>new_hello_world.aurora</code> and
+issue a <code>aurora update --shards=0-1 <job_key_value> new_hello_world.aurora</code>
+command.</p>
+
+<p>This results in instances 0 and 1 having 1 cpu, 2 GB of RAM, and 1 GB of disk space,
+while instances 2 and 3 have 1 cpu, 1 GB of RAM, and 1 GB of disk space. If instance 3
+dies and restarts, it restarts with 1 cpu, 1 GB RAM, and 1 GB disk space.</p>
+
+<p>So that means there are two simultaneous task configurations for the same Job
+at the same time, just valid for different ranges of instances.</p>
+
+<p>This isn’t a recommended pattern, but it is valid and supported by the
+Aurora scheduler. This most often manifests in the “canary pattern” where
+instance 0 runs with a different configuration than instances 1-N to test
+different code versions alongside the actual production job.</p>
+
+<p>A task can merely be a single <em>process</em> corresponding to a single
+command line, such as <code>python2.6 my_script.py</code>. However, a task can also
+consist of many separate processes, which all run within a single
+sandbox. For example, running multiple cooperating agents together,
+such as <code>logrotate</code>, <code>installer</code>, master, or slave processes. This is
+where Thermos comes in. While Aurora provides a <code>Job</code> abstraction on
+top of Mesos <code>Tasks</code>, Thermos provides a <code>Process</code> abstraction
+underneath Mesos <code>Task</code>s and serves as part of the Aurora framework’s
+executor.</p>
+
+<p>You define <code>Job</code>s,<code>Task</code>s, and <code>Process</code>es in a configuration file.
+Configuration files are written in Python, and make use of the Pystachio
+templating language. They end in a <code>.aurora</code> extension.</p>
+
+<p>Pystachio is a type-checked dictionary templating library.</p>
+
+<blockquote>
+<p>TL;DR</p>
+
+<ul>
+<li> Aurora manages jobs made of tasks.</li>
+<li> Mesos manages tasks made of processes.</li>
+<li> Thermos manages processes.</li>
+<li> All defined in <code>.aurora</code> configuration file.</li>
+</ul>
+</blockquote>
+
+<p><img alt="Aurora hierarchy" src="../images/aurora_hierarchy.png" /></p>
+
+<p>Each <code>Task</code> has a <em>sandbox</em> created when the <code>Task</code> starts and garbage
+collected when it finishes. All of a <code>Task'</code>s processes run in its
+sandbox, so processes can share state by using a shared current working
+directory.</p>
+
+<p>The sandbox garbage collection policy considers many factors, most
+importantly age and size. It makes a best-effort attempt to keep
+sandboxes around as long as possible post-task in order for service
+owners to inspect data and logs, should the <code>Task</code> have completed
+abnormally. But you can’t design your applications assuming sandboxes
+will be around forever, e.g. by building log saving or other
+checkpointing mechanisms directly into your application or into your
+<code>Job</code> description.</p>
+
+<h2 id="job-lifecycle">Job Lifecycle</h2>
+
+<p>When Aurora reads a configuration file and finds a <code>Job</code> definition, it:</p>
+
+<ol>
+<li> Evaluates the <code>Job</code> definition.</li>
+<li> Splits the <code>Job</code> into its constituent <code>Task</code>s.</li>
+<li> Sends those <code>Task</code>s to the scheduler.</li>
+<li> The scheduler puts the <code>Task</code>s into <code>PENDING</code> state, starting each
+<code>Task</code>’s life cycle.</li>
+</ol>
+
+<h3 id="life-of-a-task">Life Of A Task</h3>
+
+<p><img alt="Life of a task" src="../images/lifeofatask.png" /></p>
+
+<h3 id="pending-to-running-states">PENDING to RUNNING states</h3>
+
+<p>When a <code>Task</code> is in the <code>PENDING</code> state, the scheduler constantly
+searches for machines satisfying that <code>Task</code>’s resource request
+requirements (RAM, disk space, CPU time) while maintaining configuration
+constraints such as “a <code>Task</code> must run on machines dedicated to a
+particular role” or attribute limit constraints such as “at most 2
+<code>Task</code>s from the same <code>Job</code> may run on each rack”. When the scheduler
+finds a suitable match, it assigns the <code>Task</code> to a machine and puts the
+<code>Task</code> into the <code>ASSIGNED</code> state.</p>
+
+<p>From the <code>ASSIGNED</code> state, the scheduler sends an RPC to the slave
+machine containing <code>Task</code> configuration, which the slave uses to spawn
+an executor responsible for the <code>Task</code>’s lifecycle. When the scheduler
+receives an acknowledgement that the machine has accepted the <code>Task</code>,
+the <code>Task</code> goes into <code>STARTING</code> state.</p>
+
+<p><code>STARTING</code> state initializes a <code>Task</code> sandbox. When the sandbox is fully
+initialized, Thermos begins to invoke <code>Process</code>es. Also, the slave
+machine sends an update to the scheduler that the <code>Task</code> is
+in <code>RUNNING</code> state.</p>
+
+<p>If a <code>Task</code> stays in <code>ASSIGNED</code> or <code>STARTING</code> for too long, the
+scheduler forces it into <code>LOST</code> state, creating a new <code>Task</code> in its
+place that’s sent into <code>PENDING</code> state. This is technically true of any
+active state: if the Mesos core tells the scheduler that a slave has
+become unhealthy (or outright disappeared), the <code>Task</code>s assigned to that
+slave go into <code>LOST</code> state and new <code>Task</code>s are created in their place.
+From <code>PENDING</code> state, there is no guarantee a <code>Task</code> will be reassigned
+to the same machine unless job constraints explicitly force it there.</p>
+
+<p>If there is a state mismatch, (e.g. a machine returns from a <code>netsplit</code>
+and the scheduler has marked all its <code>Task</code>s <code>LOST</code> and rescheduled
+them), a state reconciliation process kills the errant <code>RUNNING</code> tasks,
+which may take up to an hour. But to emphasize this point: there is no
+uniqueness guarantee for a single instance of a job in the presence of
+network partitions. If the Task requires that, it should be baked in at
+the application level using a distributed coordination service such as
+Zookeeper.</p>
+
+<h3 id="task-updates">Task Updates</h3>
+
+<p><code>Job</code> configurations can be updated at any point in their lifecycle.
+Usually updates are done incrementally using a process called a <em>rolling
+upgrade</em>, in which Tasks are upgraded in small groups, one group at a
+time. Updates are done using various Aurora Client commands.</p>
+
+<p>For a configuration update, the Aurora Client calculates required changes
+by examining the current job config state and the new desired job config.
+It then starts a rolling batched update process by going through every batch
+and performing these operations:</p>
+
+<ul>
+<li>If an instance is present in the scheduler but isn’t in the new config,
+then that instance is killed.</li>
+<li>If an instance is not present in the scheduler but is present in
+the new config, then the instance is created.</li>
+<li>If an instance is present in both the scheduler the new config, then
+the client diffs both task configs. If it detects any changes, it
+performs an instance update by killing the old config instance and adds
+the new config instance.</li>
+</ul>
+
+<p>The Aurora client continues through the instance list until all tasks are
+updated, in <code>RUNNING,</code> and healthy for a configurable amount of time.
+If the client determines the update is not going well (a percentage of health
+checks have failed), it cancels the update.</p>
+
+<p>Update cancellation runs a procedure similar to the described above
+update sequence, but in reverse order. New instance configs are swapped
+with old instance configs and batch updates proceed backwards
+from the point where the update failed. E.g.; (0,1,2) (3,4,5) (6,7,
+8-FAIL) results in a rollback in order (8,7,6) (5,4,3) (2,1,0).</p>
+
+<h3 id="http-health-checking-and-graceful-shutdown">HTTP Health Checking and Graceful Shutdown</h3>
+
+<p>The Executor implements a protocol for rudimentary control of a task via HTTP. Tasks subscribe for
+this protocol by declaring a port named <code>health</code>. Take for example this configuration snippet:</p>
+<pre class="highlight text">nginx = Process(
+ name = 'nginx',
+ cmdline = './run_nginx.sh -port {{thermos.ports[http]}}')
+</pre>
+<p>When this Process is included in a job, the job will be allocated a port, and the command line
+will be replaced with something like:</p>
+<pre class="highlight text">./run_nginx.sh -port 42816
+</pre>
+<p>Where 42816 happens to be the allocated. port. Typically, the Executor monitors Processes within
+a task only by liveness of the forked process. However, when a <code>health</code> port was allocated, it will
+also send periodic HTTP health checks. A task requesting a <code>health</code> port must handle the following
+requests:</p>
+
+<table><thead>
+<tr>
+<th>HTTP request</th>
+<th>Description</th>
+</tr>
+</thead><tbody>
+<tr>
+<td><code>GET /health</code></td>
+<td>Inquires whether the task is healthy.</td>
+</tr>
+<tr>
+<td><code>POST /quitquitquit</code></td>
+<td>Task should initiate graceful shutdown.</td>
+</tr>
+<tr>
+<td><code>POST /abortabortabort</code></td>
+<td>Final warning task is being killed.</td>
+</tr>
+</tbody></table>
+
+<p>Please see the
+<a href="configuration-reference.md#user-content-healthcheckconfig-objects">configuration reference</a> for
+configuration options for this feature.</p>
+
+<h4 id="snoozing-health-checks">Snoozing Health Checks</h4>
+
+<p>If you need to pause your health check, you can do so by touching a file inside of your sandbox,
+named <code>.healthchecksnooze</code></p>
+
+<p>As long as that file is present, health checks will be disabled, enabling users to gather core dumps
+or other performance measurements without worrying about Aurora’s health check killing their
+process.</p>
+
+<p>WARNING: Remember to remove this when you are done, otherwise your instance will have permanently
+disabled health checks.</p>
+
+<h4 id="tearing-a-task-down">Tearing a task down</h4>
+
+<p>The Executor follows an escalation sequence when killing a running task:</p>
+
+<ol>
+<li>If <code>health</code> port is not present, skip to (5)</li>
+<li>POST /quitquitquit</li>
+<li>wait 5 seconds</li>
+<li>POST /abortabortabort</li>
+<li>Send SIGTERM (<code>kill</code>)</li>
+<li>Send SIGKILL (<code>kill -9</code>)</li>
+</ol>
+
+<p>If the Executor notices that all Processes in a Task have aborted during this sequence, it will
+not proceed with subsequent steps. Note that graceful shutdown is best-effort, and due to the many
+inevitable realities of distributed systems, it may not be performed.</p>
+
+<h3 id="giving-priority-to-production-tasks:-preempting">Giving Priority to Production Tasks: PREEMPTING</h3>
+
+<p>Sometimes a Task needs to be interrupted, such as when a non-production
+Task’s resources are needed by a higher priority production Task. This
+type of interruption is called a <em>pre-emption</em>. When this happens in
+Aurora, the non-production Task is killed and moved into
+the <code>PREEMPTING</code> state when both the following are true:</p>
+
+<ul>
+<li>The task being killed is a non-production task.</li>
+<li>The other task is a <code>PENDING</code> production task that hasn’t been
+scheduled due to a lack of resources.</li>
+</ul>
+
+<p>Since production tasks are much more important, Aurora kills off the
+non-production task to free up resources for the production task. The
+scheduler UI shows the non-production task was preempted in favor of the
+production task. At some point, tasks in <code>PREEMPTING</code> move to <code>KILLED</code>.</p>
+
+<p>Note that non-production tasks consuming many resources are likely to be
+preempted in favor of production tasks.</p>
+
+<h3 id="natural-termination:-finished,-failed">Natural Termination: FINISHED, FAILED</h3>
+
+<p>A <code>RUNNING</code> <code>Task</code> can terminate without direct user interaction. For
+example, it may be a finite computation that finishes, even something as
+simple as <code>echo hello world.</code>Or it could be an exceptional condition in
+a long-lived service. If the <code>Task</code> is successful (its underlying
+processes have succeeded with exit status <code>0</code> or finished without
+reaching failure limits) it moves into <code>FINISHED</code> state. If it finished
+after reaching a set of failure limits, it goes into <code>FAILED</code> state.</p>
+
+<h3 id="forceful-termination:-killing,-restarting">Forceful Termination: KILLING, RESTARTING</h3>
+
+<p>You can terminate a <code>Task</code> by issuing an <code>aurora kill</code> command, which
+moves it into <code>KILLING</code> state. The scheduler then sends the slave a
+request to terminate the <code>Task</code>. If the scheduler receives a successful
+response, it moves the Task into <code>KILLED</code> state and never restarts it.</p>
+
+<p>The scheduler has access to a non-public <code>RESTARTING</code> state. If a <code>Task</code>
+is forced into the <code>RESTARTING</code> state, the scheduler kills the
+underlying task but in parallel schedules an identical replacement for
+it.</p>
+
+<h2 id="configuration">Configuration</h2>
+
+<p>You define and configure your Jobs (and their Tasks and Processes) in
+Aurora configuration files. Their filenames end with the <code>.aurora</code>
+suffix, and you write them in Python making use of the Pystachio
+templating language, along
+with specific Aurora, Mesos, and Thermos commands and methods. See the
+<a href="/documentation/latest/configuration-reference/">Configuration Guide and Reference</a> and
+<a href="/documentation/latest/configuration-tutorial/">Configuration Tutorial</a>.</p>
+
+<h2 id="service-discovery">Service Discovery</h2>
+
+<p>It is possible for the Aurora executor to announce tasks into ServerSets for
+the purpose of service discovery. ServerSets use the Zookeeper <a href="http://zookeeper.apache.org/doc/trunk/recipes.html#sc_outOfTheBox">group membership pattern</a>
+of which there are several reference implementations:</p>
+
+<ul>
+<li><a href="https://github.com/apache/mesos/blob/master/src/zookeeper/group.cpp">C++</a></li>
+<li><a href="https://github.com/twitter/commons/blob/master/src/java/com/twitter/common/zookeeper/ServerSetImpl.java#L221">Java</a></li>
+<li><a href="https://github.com/twitter/commons/blob/master/src/python/twitter/common/zookeeper/serverset/serverset.py#L51">Python</a></li>
+</ul>
+
+<p>These can also be used natively in Finagle using the <a href="https://github.com/twitter/finagle/blob/master/finagle-serversets/src/main/scala/com/twitter/finagle/zookeeper/ZookeeperServerSetCluster.scala">ZookeeperServerSetCluster</a>.</p>
+
+<p>For more information about how to configure announcing, see the <a href="/documentation/latest/configuration-reference/">Configuration Reference</a>.</p>
+
+<h2 id="creating-jobs">Creating Jobs</h2>
+
+<p>You create and manipulate Aurora Jobs with the Aurora client, which starts all its
+command line commands with
+<code>aurora</code>. See <a href="/documentation/latest/client-commands/">Aurora Client Commands</a> for details
+about the Aurora Client.</p>
+
+<h2 id="interacting-with-jobs">Interacting With Jobs</h2>
+
+<p>You interact with Aurora jobs either via:</p>
+
+<ul>
+<li>Read-only Web UIs</li>
+</ul>
+
+<p>Part of the output from creating a new Job is a URL for the Job’s scheduler UI page.</p>
+
+<p>For example:</p>
+<pre class="highlight text"> vagrant@precise64:~$ aurora create devcluster/www-data/prod/hello \
+ /vagrant/examples/jobs/hello_world.aurora
+ INFO] Creating job hello
+ INFO] Response from scheduler: OK (message: 1 new tasks pending for job www-data/prod/hello)
+ INFO] Job url: http://precise64:8081/scheduler/www-data/prod/hello
+</pre>
+<p>The “Job url” goes to the Job’s scheduler UI page. To go to the overall scheduler UI page,
+ stop at the “scheduler” part of the URL, in this case, <code>http://precise64:8081/scheduler</code></p>
+
+<p>You can also reach the scheduler UI page via the Client command <code>aurora open</code>:</p>
+<pre class="highlight text"> aurora open [<cluster>[/<role>[/<env>/<job_name>]]]
+</pre>
+<p>If only the cluster is specified, it goes directly to that cluster’s scheduler main page.
+ If the role is specified, it goes to the top-level role page. If the full job key is specified,
+ it goes directly to the job page where you can inspect individual tasks.</p>
+
+<p>Once you click through to a role page, you see Jobs arranged separately by pending jobs, active
+ jobs, and finished jobs. Jobs are arranged by role, typically a service account for production
+ jobs and user accounts for test or development jobs.</p>
+
+<ul>
+<li>The Aurora Client’s command line interface</li>
+</ul>
+
+<p>Several Client commands have a <code>-o</code> option that automatically opens a window to
+ the specified Job’s scheduler UI URL. And, as described above, the <code>open</code> command also takes
+ you there.</p>
+
+<p>For a complete list of Aurora Client commands, use <code>aurora help</code> and, for specific
+ command help, <code>aurora help [command]</code>. <strong>Note</strong>: <code>aurora help open</code>
+ returns <code>"subcommand open not found"</code> due to our reflection tricks not
+ working on words that are also builtin Python function names. Or see the
+ <a href="/documentation/latest/client-commands/">Aurora Client Commands</a> document.</p>
+
+ </div>
+ </div>
+
+ <div class="container-fluid section-footer buffer">
+ <div class="container">
+ <div class="row">
+ <div class="col-md-2 col-md-offset-1"><h3>Quick Links</h3>
+ <ul>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/community/">Mailing Lists</a></li>
+ <li><a href="http://issues.apache.org/jira/browse/AURORA">Issue Tracking</a></li>
+ <li><a href="/documentation/latest/contributing/">How To Contribute</a></li>
+ </ul>
+ </div>
+ <div class="col-md-2"><h3>The ASF</h3>
+ <ul>
+ <li><a href="http://www.apache.org/licenses/">License</a></li>
+ <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+ <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
+ <li><a href="http://www.apache.org/security/">Security</a></li>
+ </ul>
+ </div>
+ <div class="col-md-6">
+ <p class="disclaimer">Apache Aurora is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.</p>
+ <p class="disclaimer">Copyright 2014 <a href="http://www.apache.org/">Apache Software Foundation</a>. Licensed under the <a href="http://www.apache.org/licenses/">Apache License v2.0</a>. The <a href="https://www.flickr.com/photos/trondk/12706051375/">Aurora Borealis IX photo</a> displayed on the homepage is available under a <a href="https://creativecommons.org/licenses/by-nc-nd/2.0/">Creative Commons BY-NC-ND 2.0 license</a>. Apache, Apache Aurora, and the Apache feather logo are trademarks of The Apache Software Foundation.</p>
+ </div>
+ </div>
+ </div>
+ </body>
+</html>
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+<!DOCTYPE html>
+<html lang="en">
+ <head>
+ <meta charset="utf-8">
+ <meta name="viewport" content="width=device-width, initial-scale=1">
+ <title>Apache Aurora</title>
+ <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css">
+ <link href="/assets/css/main.css" rel="stylesheet">
+ <!-- Analytics -->
+ <script type="text/javascript">
+ var _gaq = _gaq || [];
+ _gaq.push(['_setAccount', 'UA-45879646-1']);
+ _gaq.push(['_setDomainName', 'apache.org']);
+ _gaq.push(['_trackPageview']);
+
+ (function() {
+ var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
+ ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
+ var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
+ })();
+ </script>
+ </head>
+ <body>
+
+ <div class="container-fluid section-header">
+ <div class="container">
+ <div class="nav nav-bar">
+ <a href="/"><img src="/assets/img/aurora_logo_white_bkg.svg" width="300" alt="Transparent Apache Aurora logo with dark background"/></a>
+ <ul class="nav navbar-nav navbar-right">
+ <li><a href="/documentation/latest/">Documentation</a></li>
+ <li><a href="/community/">Community</a></li>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/blog/">Blog</a></li>
+ </ul>
+ </div>
+ </div>
+</div>
+ <div class="container-fluid">
+ <div class="container content">
+ <h1 id="getting-started">Getting Started</h1>
+
+<p>To replicate a real cluster environment as closely as possible, we use
+<a href="http://www.vagrantup.com/">Vagrant</a> to launch a complete Aurora cluster in a virtual machine.</p>
+
+<h2 id="prerequisites">Prerequisites</h2>
+
+<ul>
+<li><a href="https://www.virtualbox.org/">VirtualBox</a></li>
+<li><a href="http://www.vagrantup.com/">Vagrant</a></li>
+<li>A clone of the Aurora repository, or source distribution.</li>
+</ul>
+
+<p>You can start a local cluster by running:</p>
+<pre class="highlight text">vagrant up
+</pre>
+<p>Once started, several services should be running:</p>
+
+<ul>
+<li>scheduler is listening on <a href="http://192.168.33.7:8081">http://192.168.33.7:8081</a></li>
+<li>observer is listening on <a href="http://192.168.33.7:1338">http://192.168.33.7:1338</a></li>
+<li>master is listening on <a href="http://192.168.33.7:5050">http://192.168.33.7:5050</a></li>
+<li>slave is listening on <a href="http://192.168.33.7:5051">http://192.168.33.7:5051</a></li>
+</ul>
+
+<p>You can SSH into the machine with <code>vagrant ssh</code> and execute aurora client commands using the
+<code>aurora</code> command. A pre-installed <code>clusters.json</code> file refers to your local cluster as
+<code>devcluster</code>, which you will use in client commands.</p>
+
+<h1 id="deleting-your-local-cluster">Deleting your local cluster</h1>
+
+<p>Once you are finished with your local cluster, or if you would otherwise like to start from scratch,
+you can use the command <code>vagrant destroy</code> to turn off and delete the virtual file system.</p>
+
+<h1 id="rebuilding-components">Rebuilding components</h1>
+
+<p>If you are changing Aurora code and would like to rebuild a component, you can use the <code>aurorabuild</code>
+command on your vagrant machine to build and restart a component. This is considerably faster than
+destroying and rebuilding your VM.</p>
+
+<p><code>aurorabuild</code> accepts a list of components to build and update. You may invoke the command with
+no arguments to get a list of supported components.</p>
+<pre class="highlight text"> vagrant ssh -c 'aurorabuild client'
+</pre>
+<h1 id="troubleshooting">Troubleshooting</h1>
+
+<p>Most of the vagrant related problems can be fixed by the following steps:
+* Destroying the vagrant environment with <code>vagrant destroy</code>
+* Killing any orphaned VMs (see AURORA-499) with <code>virtualbox</code> UI or <code>VBoxManage</code> command line tool
+* Cleaning the repository of build artifacts and other intermediate output with <code>git clean -fdx</code>
+* Bringing up the vagrant environment with <code>vagrant up</code></p>
+
+ </div>
+ </div>
+
+ <div class="container-fluid section-footer buffer">
+ <div class="container">
+ <div class="row">
+ <div class="col-md-2 col-md-offset-1"><h3>Quick Links</h3>
+ <ul>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/community/">Mailing Lists</a></li>
+ <li><a href="http://issues.apache.org/jira/browse/AURORA">Issue Tracking</a></li>
+ <li><a href="/documentation/latest/contributing/">How To Contribute</a></li>
+ </ul>
+ </div>
+ <div class="col-md-2"><h3>The ASF</h3>
+ <ul>
+ <li><a href="http://www.apache.org/licenses/">License</a></li>
+ <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+ <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
+ <li><a href="http://www.apache.org/security/">Security</a></li>
+ </ul>
+ </div>
+ <div class="col-md-6">
+ <p class="disclaimer">Apache Aurora is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.</p>
+ <p class="disclaimer">Copyright 2014 <a href="http://www.apache.org/">Apache Software Foundation</a>. Licensed under the <a href="http://www.apache.org/licenses/">Apache License v2.0</a>. The <a href="https://www.flickr.com/photos/trondk/12706051375/">Aurora Borealis IX photo</a> displayed on the homepage is available under a <a href="https://creativecommons.org/licenses/by-nc-nd/2.0/">Creative Commons BY-NC-ND 2.0 license</a>. Apache, Apache Aurora, and the Apache feather logo are trademarks of The Apache Software Foundation.</p>
+ </div>
+ </div>
+ </div>
+ </body>
+</html>
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+<!DOCTYPE html>
+<html lang="en">
+ <head>
+ <meta charset="utf-8">
+ <meta name="viewport" content="width=device-width, initial-scale=1">
+ <title>Apache Aurora</title>
+ <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css">
+ <link href="/assets/css/main.css" rel="stylesheet">
+ <!-- Analytics -->
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+ var _gaq = _gaq || [];
+ _gaq.push(['_setAccount', 'UA-45879646-1']);
+ _gaq.push(['_setDomainName', 'apache.org']);
+ _gaq.push(['_trackPageview']);
+
+ (function() {
+ var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
+ ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
+ var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
+ })();
+ </script>
+ </head>
+ <body>
+
+ <div class="container-fluid section-header">
+ <div class="container">
+ <div class="nav nav-bar">
+ <a href="/"><img src="/assets/img/aurora_logo_white_bkg.svg" width="300" alt="Transparent Apache Aurora logo with dark background"/></a>
+ <ul class="nav navbar-nav navbar-right">
+ <li><a href="/documentation/latest/">Documentation</a></li>
+ <li><a href="/community/">Community</a></li>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/blog/">Blog</a></li>
+ </ul>
+ </div>
+ </div>
+</div>
+ <div class="container-fluid">
+ <div class="container content">
+ <h1 id="download-aurora">Download Aurora</h1>
+
+<h2 id="current-release">Current Release</h2>
+
+<p>The current released version is <em>0.6.0-incubating</em>. <a href="https://dist.apache.org/repos/dist/release/incubator/aurora/0.6.0/apache-aurora-0.6.0-incubating.tar.gz">(.tar.gz)</a>
+<a href="https://dist.apache.org/repos/dist/release/incubator/aurora/0.6.0/apache-aurora-0.6.0-incubating.tar.gz.md5">(md5)</a>
+<a href="https://dist.apache.org/repos/dist/release/incubator/aurora/0.6.0/apache-aurora-0.6.0-incubating.tar.gz.sha">(sha)</a>
+<a href="https://dist.apache.org/repos/dist/release/incubator/aurora/0.6.0/apache-aurora-0.6.0-incubating.tar.gz.asc">(sig)</a></p>
+
+<p>To quickly get started, we reccomend using Vagrant and following the <a href="http://localhost:4567/documentation/latest/vagrant/">Getting Started guide</a>.</p>
+
+<h2 id="previous-releases">Previous Releases</h2>
+
+<p><em>0.5.0-incubating</em> <a href="https://dist.apache.org/repos/dist/release/incubator/aurora/0.5.0/apache-aurora-0.5.0-incubating.tar.gz">(.tar.gz)</a>
+<a href="https://dist.apache.org/repos/dist/release/incubator/aurora/0.5.0/apache-aurora-0.5.0-incubating.tar.gz.md5">(md5)</a>
+<a href="https://dist.apache.org/repos/dist/release/incubator/aurora/0.5.0/apache-aurora-0.5.0-incubating.tar.gz.sha">(sha)</a>
+<a href="https://dist.apache.org/repos/dist/release/incubator/aurora/0.5.0/apache-aurora-0.5.0-incubating.tar.gz.asc">(sig)</a></p>
+
+<h2 id="git">Git</h2>
+
+<p>The latest code is available in git via:</p>
+<pre class="highlight text">git clone http://git.apache.org/incubator-aurora.git
+</pre>
+<p>You can browse the repo on
+<a href="https://git-wip-us.apache.org/repos/asf?p=incubator-aurora.git">Apache Git</a>
+and the <a href="https://github.com/apache/incubator-aurora">Github mirror</a>.</p>
+
+ </div>
+ </div>
+
+ <div class="container-fluid section-footer buffer">
+ <div class="container">
+ <div class="row">
+ <div class="col-md-2 col-md-offset-1"><h3>Quick Links</h3>
+ <ul>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/community/">Mailing Lists</a></li>
+ <li><a href="http://issues.apache.org/jira/browse/AURORA">Issue Tracking</a></li>
+ <li><a href="/documentation/latest/contributing/">How To Contribute</a></li>
+ </ul>
+ </div>
+ <div class="col-md-2"><h3>The ASF</h3>
+ <ul>
+ <li><a href="http://www.apache.org/licenses/">License</a></li>
+ <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+ <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
+ <li><a href="http://www.apache.org/security/">Security</a></li>
+ </ul>
+ </div>
+ <div class="col-md-6">
+ <p class="disclaimer">Apache Aurora is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.</p>
+ <p class="disclaimer">Copyright 2014 <a href="http://www.apache.org/">Apache Software Foundation</a>. Licensed under the <a href="http://www.apache.org/licenses/">Apache License v2.0</a>. The <a href="https://www.flickr.com/photos/trondk/12706051375/">Aurora Borealis IX photo</a> displayed on the homepage is available under a <a href="https://creativecommons.org/licenses/by-nc-nd/2.0/">Creative Commons BY-NC-ND 2.0 license</a>. Apache, Apache Aurora, and the Apache feather logo are trademarks of The Apache Software Foundation.</p>
+ </div>
+ </div>
+ </div>
+ </body>
+</html>
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+<!DOCTYPE html>
+<html lang="en">
+ <head>
+ <meta charset="utf-8">
+ <meta name="viewport" content="width=device-width, initial-scale=1">
+ <title>Apache Aurora</title>
+ <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css">
+ <link href="/assets/css/main.css" rel="stylesheet">
+ <!-- Analytics -->
+ <script type="text/javascript">
+ var _gaq = _gaq || [];
+ _gaq.push(['_setAccount', 'UA-45879646-1']);
+ _gaq.push(['_setDomainName', 'apache.org']);
+ _gaq.push(['_trackPageview']);
+
+ (function() {
+ var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
+ ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
+ var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
+ })();
+ </script>
+ </head>
+ <body>
+
+ <div class="container-fluid section-homepage-header">
+ <div class="container">
+ <div class="nav nav-bar">
+ <img src="/assets/img/aurora_logo_dkbkg.svg" width="300" alt="Transparent Apache Aurora logo with dark background"/>
+ <ul class="nav navbar-nav navbar-right">
+ <li><a href="/documentation/latest/">Documentation</a></li>
+ <li><a href="/community/">Community</a></li>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/blog/">Blog</a></li>
+ </ul>
+ </div>
+ </div>
+<div class="container">
+<div class="row text-center">
+<div class="col-md-8 col-md-offset-2">
+ <br /><br /><br /><br /><br /><br /><br />
+ <h1>Apache Aurora is a Mesos framework for long-running services and cron jobs.</h1>
+ <br /><br /><br /><br /><br /><br /><br />
+</div>
+</div>
+</div>
+</div>
+ <div class="container-fluid section-ltgreen buffer">
+ <div class="container">
+ <div class="row">
+ <div class="col-md-5 col-md-offset-1"><h2>What does Aurora do?</h2><p>Aurora runs applications and services across a shared pool of machines, and is responsible for keeping them running, forever. When machines experience failure, Aurora intelligently reschedules those jobs onto healthy machines.</p></div>
+ <div class="col-md-4 col-md-offset-1">
+ <iframe
+ width="420" height="236"
+ src="http://www.youtube-nocookie.com/embed/asd_h6VzaJc?rel=0&start=119&controls=0"
+ allowfullscreen></iframe></div>
+ </div>
+ </div>
+</div>
+
+<div class="container-fluid buffer">
+ <div class="container">
+ <h2 class="text-center">Key Aurora Features</h2>
+ <div class="row">
+ <div class="col-md-2 text-center"><p><span class="glyphicon glyphicon-tasks"></span></p></div>
+ <div class="col-md-4"><h3>Rolling Updates with Automatic Rollback</h3><p>When updating a job, Aurora will detect the health and status of a deployment and automatically rollback if necessary.</p></div>
+ <div class="col-md-2 text-center"><p><span class="glyphicon glyphicon-th"></span></p></div>
+ <div class="col-md-4"><h3>Resource Quota and Multi-User Support</h3><p>Aurora has a quota system to provide guaranteed resources for specific applications, and can support multiple users to deploy services.</p></div>
+ </div>
+ <div class="row">
+ <div class="col-md-2 text-center"><p><span class="glyphicon glyphicon-list-alt"></span></p></div>
+ <div class="col-md-4"><h3>Sophisticated DSL</h3><p>Services are highly-configurable via a <a href="/documentation/latest/configuration-tutorial">DSL</a> which supports templating, allowing you to establish common patterns and avoid redundant configurations.</p></div>
+ <div class="col-md-2 text-center"><p><span class="glyphicon glyphicon-cloud-upload"></span></p></div>
+ <div class="col-md-4"><h3>Service Registration</h3><p>Aurora <a href="/documentation/latest/configuration-reference/#announcer-objects">announces</a> services to Apache ZooKeeper for discovery by clients like Finagle.</p></div>
+ </div>
+ </div>
+</div>
+
+
+ <div class="container-fluid section-footer buffer">
+ <div class="container">
+ <div class="row">
+ <div class="col-md-2 col-md-offset-1"><h3>Quick Links</h3>
+ <ul>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/community/">Mailing Lists</a></li>
+ <li><a href="http://issues.apache.org/jira/browse/AURORA">Issue Tracking</a></li>
+ <li><a href="/documentation/latest/contributing/">How To Contribute</a></li>
+ </ul>
+ </div>
+ <div class="col-md-2"><h3>The ASF</h3>
+ <ul>
+ <li><a href="http://www.apache.org/licenses/">License</a></li>
+ <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+ <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
+ <li><a href="http://www.apache.org/security/">Security</a></li>
+ </ul>
+ </div>
+ <div class="col-md-6">
+ <p class="disclaimer">Apache Aurora is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.</p>
+ <p class="disclaimer">Copyright 2014 <a href="http://www.apache.org/">Apache Software Foundation</a>. Licensed under the <a href="http://www.apache.org/licenses/">Apache License v2.0</a>. The <a href="https://www.flickr.com/photos/trondk/12706051375/">Aurora Borealis IX photo</a> displayed on the homepage is available under a <a href="https://creativecommons.org/licenses/by-nc-nd/2.0/">Creative Commons BY-NC-ND 2.0 license</a>. Apache, Apache Aurora, and the Apache feather logo are trademarks of The Apache Software Foundation.</p>
+ </div>
+ </div>
+ </div>
+ </body>
+</html>
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+ <div class="container-fluid section-footer buffer">
+ <div class="container">
+ <div class="row">
+ <div class="col-md-2 col-md-offset-1"><h3>Quick Links</h3>
+ <ul>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/community/">Mailing Lists</a></li>
+ <li><a href="http://issues.apache.org/jira/browse/AURORA">Issue Tracking</a></li>
+ <li><a href="/documentation/latest/contributing/">How To Contribute</a></li>
+ </ul>
+ </div>
+ <div class="col-md-2"><h3>The ASF</h3>
+ <ul>
+ <li><a href="http://www.apache.org/licenses/">License</a></li>
+ <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
+ <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
+ <li><a href="http://www.apache.org/security/">Security</a></li>
+ </ul>
+ </div>
+ <div class="col-md-6">
+ <p class="disclaimer">Apache Aurora is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.</p>
+ <p class="disclaimer">Copyright 2014 <a href="http://www.apache.org/">Apache Software Foundation</a>. Licensed under the <a href="http://www.apache.org/licenses/">Apache License v2.0</a>. The <a href="https://www.flickr.com/photos/trondk/12706051375/">Aurora Borealis IX photo</a> displayed on the homepage is available under a <a href="https://creativecommons.org/licenses/by-nc-nd/2.0/">Creative Commons BY-NC-ND 2.0 license</a>. Apache, Apache Aurora, and the Apache feather logo are trademarks of The Apache Software Foundation.</p>
+ </div>
+ </div>
+ </div>
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+<div class="container-fluid section-homepage-header">
+ <div class="container">
+ <div class="nav nav-bar">
+ <img src="/assets/img/aurora_logo_dkbkg.svg" width="300" alt="Transparent Apache Aurora logo with dark background"/>
+ <ul class="nav navbar-nav navbar-right">
+ <li><a href="/documentation/latest/">Documentation</a></li>
+ <li><a href="/community/">Community</a></li>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/blog/">Blog</a></li>
+ </ul>
+ </div>
+ </div>
+<div class="container">
+<div class="row text-center">
+<div class="col-md-8 col-md-offset-2">
+ <br /><br /><br /><br /><br /><br /><br />
+ <h1>Apache Aurora is a Mesos framework for long-running services and cron jobs.</h1>
+ <br /><br /><br /><br /><br /><br /><br />
+</div>
+</div>
+</div>
+</div>
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+<div class="container-fluid section-header">
+ <div class="container">
+ <div class="nav nav-bar">
+ <a href="/"><img src="/assets/img/aurora_logo_white_bkg.svg" width="300" alt="Transparent Apache Aurora logo with dark background"/></a>
+ <ul class="nav navbar-nav navbar-right">
+ <li><a href="/documentation/latest/">Documentation</a></li>
+ <li><a href="/community/">Community</a></li>
+ <li><a href="/downloads/">Downloads</a></li>
+ <li><a href="/blog/">Blog</a></li>
+ </ul>
+ </div>
+ </div>
+</div>
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