atrbgithub opened a new pull request #4660: [AIRFLOW-3819] - Allow the configuration of a global default for work… URL: https://github.com/apache/airflow/pull/4660 …imits and requests Make sure you have checked _all_ steps below. ### Jira - [x] My PR addresses the following [Airflow Jira](https://issues.apache.org/jira/browse/AIRFLOW/) issues and references them in the PR title. For example, "\[AIRFLOW-XXX\] My Airflow PR" - https://issues.apache.org/jira/browse/AIRFLOW-3819 ### Description Currently the kubernetes executor allows you to specify pod resources requests and limits (cpu and memory). For example: ``` # Limit resources on this operator/task with node affinity & tolerations three_task = PythonOperator( task_id="three_task", python_callable=print_stuff, dag=dag, executor_config={ "KubernetesExecutor": {"request_memory": "128Mi", "limit_memory": "128Mi", "tolerations": tolerations, "affinity": affinity}} ) ``` These values are used by kubernetes when making scaling decisions. This PR allows you to specify a global default for these values, to ensure that each pod airflow creates has a value specified for these properties. You are still able to modify these values on a dag by dag basis. ### Tests There are currently no tests around configuring resources limits/request values as used in the example above, and these would be non-trivial to add due to the integration with kube_client. ### Commits - [x] My commits all reference Jira issues in their subject lines, and I have squashed multiple commits if they address the same issue. In addition, my commits follow the guidelines from "[How to write a good git commit message](http://chris.beams.io/posts/git-commit/)": 1. Subject is separated from body by a blank line 1. Subject is limited to 50 characters (not including Jira issue reference) 1. Subject does not end with a period 1. Subject uses the imperative mood ("add", not "adding") 1. Body wraps at 72 characters 1. Body explains "what" and "why", not "how" ### Documentation - [x] In case of new functionality, my PR adds documentation that describes how to use it. `default_airflow.cfg` has been updated with the new settings with a descriptive comment and a link to the Kubernetes documentation. ### Code Quality - [x] Passes `flake8`
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