bsdz commented on a change in pull request #15592:
URL: https://github.com/apache/airflow/pull/15592#discussion_r623232904
##########
File path: docs/apache-airflow/start/docker.rst
##########
@@ -207,3 +211,41 @@ What's Next?
============
From this point, you can head to the :doc:`/tutorial` section for further
examples or the :doc:`/howto/index` section if you're ready to get your hands
dirty.
+
+.. _docker-compose-env-variables:
+
+Environment variables supported by Docker Compose
+=================================================
+
++--------------------------------+-----------------------------------------------------+--------------------------+
+| Variable | Description
| Default |
++================================+=====================================================+==========================+
+| ``AIRFLOW_IMAGE_NAME`` | Airflow Image to use.
| apache/airflow:|version| |
++--------------------------------+-----------------------------------------------------+--------------------------+
+| ``AIRFLOW_UID`` | UID of the user to run Airflow containers
as. | ``50000`` |
+| | Override if you want to use use non-default
Airflow | |
+| | UID (for example when you map folders from
host, | |
+| | it should be set to result of ``id -u``
call. If | |
+| | you change it from default 50000, you must
set | |
+| | ``AIRFLOW_GID`` to ``0``. When it is
changed, | |
Review comment:
Perhaps reword slightly to "When it is changed, a 2nd user with name
``default`` and uid ``AIRFLOW_UID`` is dynamically created ...". Might also be
worth adding "This variable should not be confused with a variable of the same
name in the base Dockerfile which determines the UID of the ``airflow`` user.".
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