AnandInguva commented on a change in pull request #16938:
URL: https://github.com/apache/beam/pull/16938#discussion_r822859083
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File path:
website/www/site/content/en/documentation/sdks/python-pipeline-dependencies.md
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@@ -123,3 +136,19 @@ If your pipeline uses non-Python packages (e.g. packages
that require installati
--setup_file /path/to/setup.py
**Note:** Because custom commands execute after the dependencies for your
workflow are installed (by `pip`), you should omit the PyPI package dependency
from the pipeline's `requirements.txt` file and from the `install_requires`
parameter in the `setuptools.setup()` call of your `setup.py` file.
+
+## Pre-building SDK container image
+
+In the pre-building step, we install pipeline dependencies on the container
image prior to the job submission. This would speed up the pipeline execution.\
+To use pre-building the dependencies from `requirements.txt` on the container
image. Follow the steps below.
+1. Provide the container engine. We support `docker` and
`cloud_build`(requires a GCP project with Cloud Build API enabled).
+
+ --prebuild_sdk_container_enginer <execution_environment>
+2. To pass a base image for pre-building dependencies, enable this flag. If
not, apache beam's base image would be used.
Review comment:
As @y1chi pointed out, it may not work if the user doesn't follow apache
beam's contract. But we do instruct them to follow the contract in some way.
So, I assume we can introduce this section as part of the instruction?
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