[Question] Pluggable support for customized substate and events consuming and handling?

[leletan]

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Hi community,

I am wondering if there is any pluggable way to extend the current operator behavior to cover more complicated use cases, including capturing and handling customized events, potentially allow user to define customized ApplicationStateType to make it more native. And it would be nicer if we can write those into the CRD and log them somewhere for trouble shooting later.

One of the use cases would be we often found our job got stuck in SUBMITTED state due to various reasons. Depending on user implementation, a lot of things can happen during that stage: scheduler scheduling, node provisioning, driver image downloading, driver pod init container running, etc. It will be much user friendly to allow user plug in logic to capture and handle events generated by different components and report them with a customized state in CRD.

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[leletan]

cc @yuchaoran2011