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Creating dynamic pool from task


Hi all,

I have a DAG that creates a cluster, starts computation tasks, and after they completed, tears down the cluster. I want to limit concurrency for the computation tasks carried on this cluster to fixed number. So logically, I need a pool that is exclusive to the cluster created by a task. I don't want interference with other DAGs or different runs of the same DAG.

I thought I could solve this problem by creating a pool dynamically from a task after the cluster is created and delete it once the computation tasks are finished. I thought I could template the pool parameter of the computation tasks to make them use this dynamically created cluster.

However this way the computation tasks will never be triggered. So I think the pool parameter is saved in the task instance before being templated. I would like to hear your thoughts on how to achieve the desired behavior.

Thanks,

Dávid Szakállas
Software Engineer | Whitepages Data Services