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Dynamically Change Tasks Queues Using DAG Parameters

apache/airflow#35542·46930·Python·1031 天未动·5 条评论·上游最近活跃 ·池内状态:可认领
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### Description It is not possible at the moment to dynamically re-route tasks depending on the DAG Parameters. An example: ``` @task def helloWorld(): print("Hello World!") @dag( default_args=DEFAULT_ARGS, dag_id='python_task', description='Test Python Task', start_date=datetime.now(), catchup=False, params={ "helloWorldQueue": "my-queue" } ) def rsgPythonTask(): helloWorld.override(queue="{{ params.helloWorldQueue }}")() ``` This is quite an important feature in a Task Scheduler and I currently cannot find another way of doing it. I've also tried to use cluster_policies, but the task_policy does not allow to change the queue, and the task_mutation_policy somehow hangs my entire Airflow setup and does not work correctly.(2.5.3). ### Use case/motivation We do have a Core Airflow instance with Localized workers (India, UK, etc...) We run Airflow on top of a Job Automation system that creates jobs based on custom configurations and finally triggers a DAG linked to this Configuration. Some Tasks **must** run in a localized way, and we want to be able to re-route tasks to the localized worker automatically using the Configuration. The Configuration can feed the location of the Worker by using the "queue" parameter, so each task can be re-reouted to a specific queue in a specific location. I am not entirely sure why it's not possible to do this now. It's not sustainable and not scalable at all to have to hardcode queue names for workers in the DAG code. Unless I am missing something, and this is currently doable somehow. ### Related issues _No response_ ### Are you willing to submit a PR? - [ ] Yes I am willing to submit a PR! ### Code of Conduct - [X] I agree to follow this project's [Code of Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)
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