mik-laj commented on a change in pull request #10916:
URL: https://github.com/apache/airflow/pull/10916#discussion_r487811569
##########
File path: docs/executor/kubernetes.rst
##########
@@ -41,6 +41,61 @@ The volumes are optional and depend on your configuration.
There are two volumes
To troubleshoot issue with KubernetesExecutor, you can use ``airflow
kubernetes generate-dag-yaml`` command.
This command generates the pods as they will be launched in Kubernetes and
dumps them into yaml files for you to inspect.
+.. _concepts:pod_template_file:
+
+pod_template_file
+#################
+
+As of Airflow 1.10.12, users can now use a pod_template_file setting in their
airflow.cfg to form the basis of
+their KubernetesExecutor pods. This process is faster and easier to modify.
+
+We include multiple examples of working pod operators below, but we would also
like to explain a few necessary components
+if you want to customize your pod_template_files. As long as you have these
components, every other element
+in the template is
+customizable.
+
+1. Airflow will overwrite the base container image and the pod name
+
+There are two points where airflow potentially overwrites the base image: in
the airflow.cfg
+or the ``pod_override`` (discussed below) setting. This value is overwitten to
ensure that users do
+not need to update multiple template files every time they upgrade their
docker image. The other field
+that Airflow overwrites is the ``pod.metadata.name`` field. This field has to
be unique across all pods,
+so we generate these names dynamically before launch.
+
+It's important to note while Airflow overwrites these fields, they **can not
be left blank**.
+If these fields do not exist, kubernetes can not load the yaml into a
Kuberentes V1Pod
+
+2. Each airflow ``pod_template_file`` must have a container named ``base`` at
the ``pod.spec.containers[0]`` position
+
+Airflow uses the ``pod_template_file`` by making certain assumptions about the
structure of the template.
+When airflow creates the worker pod's command, it assumes that the airflow
worker container part exists
+at the beginning of the container array. It then assumes that the container is
named "base"
+when it merges this pod with internal configs. Users are more than welcome to
create
Review comment:
```suggestion
when it merges this pod with internal configs. You are more than welcome to
create
```
See:
https://developers.google.com/style/person
and
> Address the reader directly. Use you, instead of the user or they. For
more information, see [Second person and first
person](https://developers.google.com/style/translation
).
https://developers.google.com/style/translation
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