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https://issues.apache.org/jira/browse/BEAM-8209?focusedWorklogId=317931&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-317931
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ASF GitHub Bot logged work on BEAM-8209:
----------------------------------------
Author: ASF GitHub Bot
Created on: 25/Sep/19 00:42
Start Date: 25/Sep/19 00:42
Worklog Time Spent: 10m
Work Description: Hannah-Jiang commented on pull request #9607:
[BEAM-8209] Custom container docs
URL: https://github.com/apache/beam/pull/9607#discussion_r327888242
##########
File path: website/src/documentation/runtime/environments.md
##########
@@ -0,0 +1,187 @@
+---
+layout: section
+title: "Runtime environments"
+section_menu: section-menu/documentation.html
+permalink: /documentation/runtime/environments/
+redirect_from:
+ - /documentation/execution-model/
+---
+<!--
+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.
+-->
+
+# Runtime environments
+
+Any execution engine can run the Beam SDK beacuse the SDK runtime environment
is [containerized](https://s.apache.org/beam-fn-api-container-contract) with
[Docker](https://www.docker.com/) and isolated from other runtime systems. This
page describes how to build, customize, and push Beam SDK container images.
+
+## Building container images
+
+Before building Beam SDK container images:
+* Register a [Bintray](https://bintray.com/) account with a Docker repository
named `apache`.
+* Install [Docker](https://www.docker.com/) on your workstation.
+
+To build Beam SDK container images:
+
+<ol>
+ <li>
+ Navigate to your local copy of the <a
href="https://github.com/apache/beam";><code>beam</code></a>
+ </li>
+ <li>
+ Run Gradle with the <code>docker</code> target: <pre>./gradlew
docker</pre>
+ </li>
+</ol>
+
+> **Note**: It may take a long time to build all of the container images. You
can instead build the images for specific SDKs:
+>
+> ```
+> ./gradlew -p sdks/java/container docker
+> ./gradlew -p sdks/python/container docker
+> ./gradlew -p sdks/go/container docker
+> ```
+
+Run `docker images` to examine the containers. For example, if you
successfully built the container images, the command prompt displays a response
like:
+
+```
+REPOSITORY TAG IMAGE
ID CREATED SIZE
+$USER-docker-apache.bintray.io/beam/python latest 4ea515403a1a
3 minutes ago 1.27GB
+$USER-docker-apache.bintray.io/beam/java latest 0103512f1d8f
34 minutes ago 780MB
+$USER-docker-apache.bintray.io/beam/go latest ce055985808a
35 minutes ago 121MB
+```
+
+<b>Although the respository names look like URLs, the container images are
stored locally on your workstation.</b> After building the container images
locally, you can [push](#pushing-container-images) them to an eponymous
repository online.
+
+### Overriding default Docker targets
+
+The default SDK version is `latest` and the default Docker repository is the
following Bintray location:
+
+```
+$USER-docker-apache.bintray.io/beam
+```
+
+When you [build SDK container images](#building-container-images), you can
override the default version and location.
+
+To specify an older Python SDK version, like 2.3.0, build the container with
the `docker-tag` option:
+
+```
+./gradlew docker -Pdocker-tag=2.3.0
+```
+
+To change the `docker` target, build the container with the
`docker-repository-root` option:
+
+```
+./gradlew docker -Pdocker-repository-root=$LOCATION
+```
+
+## Customizing container images
+
+You can add extra dependencies or serialization files to container images so
the execution engine doesn't need them.
+
+To customize a container image, either:
+* [Write a new](#writing-new-dockerfiles)
[Dockerfile](https://docs.docker.com/engine/reference/builder/) on top of the
original
+* [Modify](#modifying-dockerfiles) the [original
Dockerfile](https://github.com/apache/beam/blob/master/sdks/python/container/Dockerfile)
and reimage the container
+
+It's often easier to write a new Dockerfile, but you can customize anything,
including the base OS, by modifying the original.
+
+### Writing new Dockerfiles on top of the original {#writing-new-dockerfiles}
+
+<ol>
+ <li>
+ Pull a <a
href="https://console.cloud.google.com/gcr/images/apache-beam-testing/GLOBAL/beam/sdks/release";>prebuilt
SDK container image</a> for your target language and version.
+ </li>
+ <li>
+ <a
href="https://docs.docker.com/develop/develop-images/dockerfile_best-practices/";>Write
a new Dockerfile</a> that <a
href="https://docs.docker.com/engine/reference/builder/#from";>designates</a>
the original as its <a
href="https://docs.docker.com/glossary/?term=parent%20image";>parent</a>
+ </li>
+ <li>
+ Build a child image: <pre>docker build -f /path/to/new/Dockerfile</pre>
+ </li>
+</ol>
+
+### Modifying the original Dockerfile {#modifying-dockerfiles}
+
+1. Pull the [prebuilt SDK container
image](https://console.cloud.google.com/gcr/images/apache-beam-testing/GLOBAL/beam/sdks/release)
for your target language and version
+2. Customize the
[Dockerfile](https://github.com/apache/beam/blob/master/sdks/python/container/Dockerfile).
If you're adding dependencies from [PyPI](https://pypi.org/), use
`base_image_requirements.txt` instead of the Dockerfile.
+3. [Reimage](#building-container-images) the container
+
+### Testing customized images
+
+Test customized images with PortableRunner. PortableRunner targets the default
Docker images, like
`${USER}-docker-apache.bintray.io/beam/python${version}:latest`. You can
specify a different container with the `--environment_config` flag.
+
+#### Testing on local machines
+
+```
+python -m apache_beam.examples.wordcount --input /path/to/inputfile --output
/path/to/write/counts \
Review comment:
This line is too long, let's split it to
```
python -m apache_beam.examples.wordcount \
--input /path/to/inputfile \
--output /path/to/write/counts \
```
This applies to all other tests.
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Issue Time Tracking
-------------------
Worklog Id: (was: 317931)
Time Spent: 1h 50m (was: 1h 40m)
> Document custom docker containers
> ---------------------------------
>
> Key: BEAM-8209
> URL: https://issues.apache.org/jira/browse/BEAM-8209
> Project: Beam
> Issue Type: Sub-task
> Components: website
> Reporter: Cyrus Maden
> Assignee: Cyrus Maden
> Priority: Minor
> Fix For: 2.16.0
>
> Time Spent: 1h 50m
> Remaining Estimate: 0h
>
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