[bug]：applyPods

[LY-today]

When synchronizing cluster resources, the simulated scheduler does not set CreationTimestamp and ResourceVersion to nil, resulting in an error in the fake cluster apply pod.

failed to apply Namespace: Operation cannot be fulfilled on namespaces "1857f8a4-2993-49e6-9151-e6d2f94ed752": the object has been modified; please apply your changes to the latest version and try again

[LY-today]

@sanposhiho please check

[sanposhiho]

@saza-ku Can you check? cc @utam0k @ordovicia

[saza-ku]

We could avoid the error by removing some kinds of metadata, and we've also implemented. https://github.com/kubernetes-sigs/kube-scheduler-simulator/blob/master/simulator/resourceapplier/resourceapplier.go#L279

Could you provide how to repro it? I guess you might use an older version of the simulator.

[LY-today]

We could avoid the error by removing some kinds of metadata, and we've also implemented. https://github.com/kubernetes-sigs/kube-scheduler-simulator/blob/master/simulator/resourceapplier/resourceapplier.go#L279

Could you provide how to repro it? I guess you might use an older version of the simulator.

It seems that the simulation scheduler did not remove the CreationTimestamp

[saza-ku]

I see. So removing also CreationTimestamp might work, right?

[LY-today]

I see. So removing also CreationTimestamp might work, right?

No problem, it works fine. Need to make a PR?

[saza-ku]

Yes, please!

[LY-today]

@saza-ku #439 please check