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Posted to dev@nutch.apache.org by GitBox <gi...@apache.org> on 2021/06/28 03:26:44 UTC
[GitHub] [nutch] lewismc opened a new pull request #691: WIP NUTCH-2883 Provide means to run server and webapp as persistent services in Docker container
lewismc opened a new pull request #691:
URL: https://github.com/apache/nutch/pull/691
This is a WIP for https://issues.apache.org/jira/browse/NUTCH-2883 feedback would be appreciated.
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[GitHub] [nutch] lewismc commented on a change in pull request #691: WIP NUTCH-2883 Provide means to run server and webapp as persistent services in Docker container
Posted by GitBox <gi...@apache.org>.
lewismc commented on a change in pull request #691:
URL: https://github.com/apache/nutch/pull/691#discussion_r659933757
##########
File path: docker/Dockerfile
##########
@@ -20,10 +20,12 @@ WORKDIR /root/
# Install dependencies
RUN apk update
-RUN apk --no-cache add apache-ant bash git openjdk11
+RUN apk --no-cache add apache-ant bash git openjdk11 supervisor
+# Establish environment variables
RUN echo 'export JAVA_HOME=/usr/lib/jvm/java-11-openjdk' >> $HOME/.bashrc
-env NUTCH_HOME='/root/nutch_source/runtime/local'
+ENV JAVA_HOME '/usr/lib/jvm/java-11-openjdk'
Review comment:
Thanks @sebastian-nagel
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[GitHub] [nutch] sebastian-nagel commented on a change in pull request #691: NUTCH-2883 Provide means to run server and webapp as persistent services in Docker container
Posted by GitBox <gi...@apache.org>.
sebastian-nagel commented on a change in pull request #691:
URL: https://github.com/apache/nutch/pull/691#discussion_r665509195
##########
File path: docker/config/supervisord_startserver.conf
##########
@@ -0,0 +1,47 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You 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.
+
+[supervisord]
+childlogdir=/var/log/supervisord/
+logfile=/tmp/supervisord.log ; (main log file;default $CWD/supervisord.log)
+logfile_maxbytes=50MB ; (max main logfile bytes b4 rotation;default 50MB)
+logfile_backups=10 ; (num of main logfile rotation backups;default 10)
+loglevel=info ; (log level;default info; others: debug,warn,trace)
+minfds=1024 ; (min. avail startup file descriptors;default 1024)
+minprocs=200 ; (min. avail process descriptors;default 200)
+nodaemon=false ; (start in foreground if true;default false)
+pidfile=/tmp/supervisord.pid ; (supervisord pidfile;default supervisord.pid)
Review comment:
... and pid files I'd expect in `/run/` or `/var/run/`
##########
File path: docker/config/supervisord_startserver.conf
##########
@@ -0,0 +1,47 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You 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.
+
+[supervisord]
+childlogdir=/var/log/supervisord/
+logfile=/tmp/supervisord.log ; (main log file;default $CWD/supervisord.log)
Review comment:
Not a common place for log files. Is there a reason why the log file isn't also placed in `/var/log/supervisord/`?
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[GitHub] [nutch] lewismc commented on a change in pull request #691: NUTCH-2883 Provide means to run server and webapp as persistent services in Docker container
Posted by GitBox <gi...@apache.org>.
lewismc commented on a change in pull request #691:
URL: https://github.com/apache/nutch/pull/691#discussion_r665828374
##########
File path: docker/config/supervisord_startserver.conf
##########
@@ -0,0 +1,47 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You 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.
+
+[supervisord]
+childlogdir=/var/log/supervisord/
+logfile=/tmp/supervisord.log ; (main log file;default $CWD/supervisord.log)
Review comment:
I am happy to update this...
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[GitHub] [nutch] lewismc commented on pull request #691: NUTCH-2883 Provide means to run server and webapp as persistent services in Docker container
Posted by GitBox <gi...@apache.org>.
lewismc commented on pull request #691:
URL: https://github.com/apache/nutch/pull/691#issuecomment-871943637
OK this PR is ready for full review. I've added in the conditional logic as explained in the README.
There are three build **modes** which can be activated using the `--build-arg MODE=0` flag. All values used here are defaults.
* 0 == Nutch master branch source install with `crawl` and `nutch` scripts on `$PATH`
* 1 == Same as mode 0 with addition of **Nutch REST Server**; additional build args `--build-arg SERVER_PORT=8081` and `--build-arg SERVER_HOST=0.0.0.0`
* 2 == Same as mode 1 with addition of **Nutch WebApp**; additional build args `--build-arg WEBAPP_PORT=8080`
I augmented a the documentation so the above is clear. I also showed how we can browse container logs for server and webapp if they are running.
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[GitHub] [nutch] lewismc commented on pull request #691: WIP NUTCH-2883 Provide means to run server and webapp as persistent services in Docker container
Posted by GitBox <gi...@apache.org>.
lewismc commented on pull request #691:
URL: https://github.com/apache/nutch/pull/691#issuecomment-869830352
Something I would like feedback on is whether we want to run `startserver` and/or `webapp` by default? That is the behaviour implemented in this PR.
I haven't found a way to make this conditional i.e. if we were to build the image as follows
```bash
docker build -t apache/nutch . --build-arg startserver=true --build-arg webapp=true
```
Then we would expose the ports (these could also be configurable) by implementing `--build-arg server_port=XXXX --build-arg webapp_port=XXXX` and also activate the `ENTRYPOINT` for `supervisord`.
Also, it's important for me to mention that I am aware of the one-service-one-container rule. The reason I chose to try supervisord in this case was that these services are entirely complimentary... I didn't see the reason to complicate things further by using `docker-compose`.
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[GitHub] [nutch] lewismc commented on a change in pull request #691: WIP NUTCH-2883 Provide means to run server and webapp as persistent services in Docker container
Posted by GitBox <gi...@apache.org>.
lewismc commented on a change in pull request #691:
URL: https://github.com/apache/nutch/pull/691#discussion_r659933757
##########
File path: docker/Dockerfile
##########
@@ -20,10 +20,12 @@ WORKDIR /root/
# Install dependencies
RUN apk update
-RUN apk --no-cache add apache-ant bash git openjdk11
+RUN apk --no-cache add apache-ant bash git openjdk11 supervisor
+# Establish environment variables
RUN echo 'export JAVA_HOME=/usr/lib/jvm/java-11-openjdk' >> $HOME/.bashrc
-env NUTCH_HOME='/root/nutch_source/runtime/local'
+ENV JAVA_HOME '/usr/lib/jvm/java-11-openjdk'
Review comment:
Thanks @sebastian-nagel
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[GitHub] [nutch] sebastian-nagel commented on pull request #691: NUTCH-2883 Provide means to run server and webapp as persistent services in Docker container
Posted by GitBox <gi...@apache.org>.
sebastian-nagel commented on pull request #691:
URL: https://github.com/apache/nutch/pull/691#issuecomment-925304439
Hi @lewismc! Sorry, it took longer to get back...
Finally found, why server and webapp didn't work (`docker prune` didn't help):
- the environment variables `SERVER_HOST`, `SERVER_PORT` and `WEBAPP_PORT` were defined but empty
- after some trial I've discovered that [ARG instructions must be within the FROM block they are used in](https://docs.docker.com/engine/reference/builder/#understand-how-arg-and-from-interact). After moving the ARG lines into the right places (aebf682) I was able to start the server. Could you verify this solution?
Another point: after the webapp was moved into separate repository (see NUTCH-2886), it needs to be installed separately in the Dockerfile. Right now it fails with:
```
==> /var/log/supervisord/nutchwebapp_stderr.log <==
Error: Could not find or load main class webapp
Caused by: java.lang.ClassNotFoundException: webapp
```
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[GitHub] [nutch] lewismc commented on pull request #691: NUTCH-2883 Provide means to run server and webapp as persistent services in Docker container
Posted by GitBox <gi...@apache.org>.
lewismc commented on pull request #691:
URL: https://github.com/apache/nutch/pull/691#issuecomment-876084540
@sebastian-nagel here's what I tried. First prune entire Docker development cache
```
docker system prune -a
...
Total reclaimed space: 14.1GB
```
The build
```
docker % docker build -t apache/nutch . --build-arg BUILD_MODE=2 --build-arg SERVER_PORT=8081 --build-arg SERVER_HOST=0.0.0.0 --build-arg WEBAPP_PORT=8080
...
[+] Building 743.6s (17/17) FINISHED
=> [internal] load build definition from Dockerfile 0.0s
=> => transferring dockerfile: 4.42kB 0.0s
=> [internal] load .dockerignore 0.0s
=> => transferring context: 2B 0.0s
=> [internal] load metadata for docker.io/library/alpine:3.13 1.4s
=> [base 1/8] FROM docker.io/library/alpine:3.13@sha256:f51ff2d96627690d62fee79e6eecd9fa87429a38142b5df8a3bfbb26061df7fc 0.6s
=> => resolve docker.io/library/alpine:3.13@sha256:f51ff2d96627690d62fee79e6eecd9fa87429a38142b5df8a3bfbb26061df7fc 0.0s
=> => sha256:f51ff2d96627690d62fee79e6eecd9fa87429a38142b5df8a3bfbb26061df7fc 1.64kB / 1.64kB 0.0s
=> => sha256:def822f9851ca422481ec6fee59a9966f12b351c62ccb9aca841526ffaa9f748 528B / 528B 0.0s
=> => sha256:6dbb9cc54074106d46d4ccb330f2a40a682d49dda5f4844962b7dce9fe44aaec 1.47kB / 1.47kB 0.0s
=> => sha256:540db60ca9383eac9e418f78490994d0af424aab7bf6d0e47ac8ed4e2e9bcbba 2.81MB / 2.81MB 0.4s
=> => extracting sha256:540db60ca9383eac9e418f78490994d0af424aab7bf6d0e47ac8ed4e2e9bcbba 0.2s
=> [internal] load build context 0.0s
=> => transferring context: 2.74kB 0.0s
=> [base 2/8] WORKDIR /root/ 0.0s
=> [base 3/8] RUN apk update 1.0s
=> [base 4/8] RUN apk --no-cache add apache-ant bash git openjdk11 supervisor 18.6s
=> [base 5/8] RUN echo 'export JAVA_HOME=/usr/lib/jvm/java-11-openjdk' >> $HOME/.bashrc 0.2s
=> [base 6/8] RUN git clone https://github.com/apache/nutch.git nutch_source && cd nutch_source && ant runtime && rm -rf build/ && rm -rf /root/.ivy2/ 716.3s
=> [base 7/8] RUN ln -sf /root/nutch_source/runtime/local/bin/nutch /usr/local/bin/ 0.3s
=> [base 8/8] RUN ln -sf /root/nutch_source/runtime/local/bin/crawl /usr/local/bin/ 0.2s
=> [branch-version-2 1/3] RUN echo "Nutch master branch source install with 'crawl' and 'nutch' scripts on PATH, Nutch REST Server on 0.0.0.0:8081 and WebApp on this container port 8080" 0.3s
=> [branch-version-2 2/3] RUN mkdir -p /var/log/supervisord 0.3s
=> [branch-version-2 3/3] COPY ./config/supervisord_startserver_webapp.conf /etc/supervisord.conf 0.0s
=> [final 1/1] RUN echo "Successfully built image, see https://s.apache.org/m5933 for guidance on running a container instance." 0.2s
=> exporting to image 4.0s
=> => exporting layers 4.0s
=> => writing image sha256:0b526f0c7743d74fa9afa1db86956e1f2d88974f460bd64d94b6492bfc8b65de 0.0s
=> => naming to docker.io/apache/nutch
```
Note the above output where the correct `supervisord` file is being `COPY`d and the REST server and WebApp details are all consistent.
I then run
```
docker run -t -i -d -p 8080:8080 -p 8081:8081 --name nutchcontainer apache/nutch
```
and curl the REST endpoint
```
curl http://localhost:8081/admin
{"startDate":1625713304457,"configuration":["default"],"jobs":[],"runningJobs":[]}
```
I can also reach the WebApp on 8081.
I can exec into contained as follows
```
docker exec -it 1cda988617a6 /bin/bash
...
bash-5.1# tail /var/log/supervisord/*
==> /var/log/supervisord/nutchserver_stderr.log <==
==> /var/log/supervisord/nutchserver_stdout.log <==
Starting NutchServer on 0.0.0.0:8081 ...
Started Nutch Server on 0.0.0.0:8081 at 1625713304457
==> /var/log/supervisord/nutchwebapp_stderr.log <==
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.springframework.cglib.core.ReflectUtils$2 (file:/root/nutch_source/runtime/local/lib/spring-core-4.0.9.RELEASE.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain)
WARNING: Please consider reporting this to the maintainers of org.springframework.cglib.core.ReflectUtils$2
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
==> /var/log/supervisord/nutchwebapp_stdout.log <==
==> /var/log/supervisord/supervisord.log <==
2021-07-08 03:01:41,515 INFO Set uid to user 0 succeeded
2021-07-08 03:01:41,517 INFO supervisord started with pid 1
2021-07-08 03:01:42,500 INFO spawned: 'nutchserver' with pid 8
2021-07-08 03:01:42,503 INFO spawned: 'nutchwebapp' with pid 9
2021-07-08 03:01:43,505 INFO success: nutchserver entered RUNNING state, process has stayed up for > than 0 seconds (startsecs)
2021-07-08 03:01:43,506 INFO success: nutchwebapp entered RUNNING state, process has stayed up for > than 0 seconds (startsecs)
==> /var/log/supervisord/supervisord.pid <==
1
```
All is good...
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[GitHub] [nutch] lewismc commented on pull request #691: WIP NUTCH-2883 Provide means to run server and webapp as persistent services in Docker container
Posted by GitBox <gi...@apache.org>.
lewismc commented on pull request #691:
URL: https://github.com/apache/nutch/pull/691#issuecomment-869830352
Something I would like feedback on is whether we want to run `startserver` and/or `webapp` by default? That is the behaviour implemented in this PR.
I haven't found a way to make this conditional i.e. if we were to build the image as follows
```bash
docker build -t apache/nutch . --build-arg startserver=true --build-arg webapp=true
```
Then we would expose the ports (these could also be configurable) by implementing `--build-arg server_port=XXXX --build-arg webapp_port=XXXX` and also activate the `ENTRYPOINT` for `supervisord`.
Also, it's important for me to mention that I am aware of the one-service-one-container rule. The reason I chose to try supervisord in this case was that these services are entirely complimentary... I didn't see the reason to complicate things further by using `docker-compose`.
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[GitHub] [nutch] lewismc commented on a change in pull request #691: NUTCH-2883 Provide means to run server and webapp as persistent services in Docker container
Posted by GitBox <gi...@apache.org>.
lewismc commented on a change in pull request #691:
URL: https://github.com/apache/nutch/pull/691#discussion_r665828450
##########
File path: docker/config/supervisord_startserver.conf
##########
@@ -0,0 +1,47 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You 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.
+
+[supervisord]
+childlogdir=/var/log/supervisord/
+logfile=/tmp/supervisord.log ; (main log file;default $CWD/supervisord.log)
+logfile_maxbytes=50MB ; (max main logfile bytes b4 rotation;default 50MB)
+logfile_backups=10 ; (num of main logfile rotation backups;default 10)
+loglevel=info ; (log level;default info; others: debug,warn,trace)
+minfds=1024 ; (min. avail startup file descriptors;default 1024)
+minprocs=200 ; (min. avail process descriptors;default 200)
+nodaemon=false ; (start in foreground if true;default false)
+pidfile=/tmp/supervisord.pid ; (supervisord pidfile;default supervisord.pid)
Review comment:
Same, I am happy to update this.
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[GitHub] [nutch] lewismc commented on pull request #691: NUTCH-2883 Provide means to run server and webapp as persistent services in Docker container
Posted by GitBox <gi...@apache.org>.
lewismc commented on pull request #691:
URL: https://github.com/apache/nutch/pull/691#issuecomment-978441267
I'll update this to remove the webapp.
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[GitHub] [nutch] lewismc edited a comment on pull request #691: NUTCH-2883 Provide means to run server and webapp as persistent services in Docker container
Posted by GitBox <gi...@apache.org>.
lewismc edited a comment on pull request #691:
URL: https://github.com/apache/nutch/pull/691#issuecomment-871943637
OK this PR is ready for full review. I've added in the conditional logic as explained in the README.
There are three build **modes** which can be activated using the `--build-arg MODE=0` flag. All values used here are defaults.
* 0 == Nutch master branch source install with `crawl` and `nutch` scripts on `$PATH`
* 1 == Same as mode 0 with addition of **Nutch REST Server**; additional build args `--build-arg SERVER_PORT=8081` and `--build-arg SERVER_HOST=0.0.0.0`
* 2 == Same as mode 1 with addition of **Nutch WebApp**; additional build args `--build-arg WEBAPP_PORT=8080`
I augmented a the documentation so the above is clear. I also showed how we can browse container logs for server and webapp if they are running.
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[GitHub] [nutch] sebastian-nagel commented on a change in pull request #691: WIP NUTCH-2883 Provide means to run server and webapp as persistent services in Docker container
Posted by GitBox <gi...@apache.org>.
sebastian-nagel commented on a change in pull request #691:
URL: https://github.com/apache/nutch/pull/691#discussion_r659610611
##########
File path: docker/Dockerfile
##########
@@ -20,10 +20,12 @@ WORKDIR /root/
# Install dependencies
RUN apk update
-RUN apk --no-cache add apache-ant bash git openjdk11
+RUN apk --no-cache add apache-ant bash git openjdk11 supervisor
+# Establish environment variables
RUN echo 'export JAVA_HOME=/usr/lib/jvm/java-11-openjdk' >> $HOME/.bashrc
-env NUTCH_HOME='/root/nutch_source/runtime/local'
+ENV JAVA_HOME '/usr/lib/jvm/java-11-openjdk'
Review comment:
The [Dockerfile reference](https://docs.docker.com/engine/reference/builder/#env) discourages the use of `ENV var val` in favor of `ENV var=val`. I've seen this variant the first time and had to try out and read the documentation.
+1 to unify how JAVA_HOME and NUTCH_HOME are set. Also good not to force the usage of the bash as command-line shell.
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