[jira] [Updated] (WHIRR-221) Optionally control the order of starting services

["David Alves (Updated) (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/WHIRR-221?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

David Alves updated WHIRR-221:
------------------------------

    Attachment: WHIRR-221.patch

First iteration patch, still not tested (and not compiling because of BYON action):

- added the concept of dependencies
- added a dependency analyzer that creates stages: each stage is a set of roles to be executed across instancetemplates before the next stage can begin
- Moved non script specific stuff in ScriptBasedClusterAction to ClusterAction including a generic stage execution system (each action sets a callable in the ClusterActionEvent and this callable is executed by ClusterAction in a per stage basis).
- All actions that inherited from ScriptBasedCluster action are now stage oriented, the only one that is not is BoostrapClusterAction.
- Took the chance to remove the deprecated call of ScripBaseClusterAction


To Come:
- DryRunTests (ongoing)
- Perform the Itests
- Finish BYON (which should be stage aware)
                
> Optionally control the order of starting services
> -------------------------------------------------
>
>                 Key: WHIRR-221
>                 URL: https://issues.apache.org/jira/browse/WHIRR-221
>             Project: Whirr
>          Issue Type: New Feature
>          Components: core, documentation
>    Affects Versions: 0.7.1, 0.8.0
>            Reporter: Andrei Savu
>            Assignee: David Alves
>            Priority: Critical
>             Fix For: 0.8.0
>
>         Attachments: WHIRR-221-v1.patch, WHIRR-221-v3.patch, WHIRR-221.patch, WHIRR-221.patch
>
>
> As Lars sugested in WHIRR-170:
> The user should "be able to optionally control the order (services start). This could be role based and specified like so
> {code}
> whirr.role-order=zk,nn+jt,dn+tt,hbase-master,hbase-regionserver
> {code}
> If not specified the system should make any effort to start the services as quickly as possible, for example in multiple threads. In other words, when the role-order is not given no guarantee about order can be given."

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