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[etcd] Reduce the etcd surface area in the integration test to minimize deps
This is a code refactor for isolation of client usage.
persistentvolumecontroller.NewPersistentVolumeController has 11 arguments now,
put them into a structure.
Also, rename NewPersistentVolumeController to NewController, persistentvolume
is already name of the package.
Fixes#30219
Automatic merge from submit-queue
Use PV shared informer in PV controller
Use the PV shared informer, addressing (partially) https://github.com/kubernetes/kubernetes/issues/26247 . Using the PVC shared informer is not so simple because sometimes the controller wants to `Requeue` and...
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Add integration test for volume controller startup.
Tests #28002 with real etcd (unit tests have a fake one with different behavior).
@kubernetes/sig-storage
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integration test: Modify PVs/PVCs during binding.
Previous volume binder code was not able to cope with PVs or PVCs getting modified during the binding process. Current one should be resilient to these changes, so let's test it.
It makes the test approximately twice as long as before, from ~2 seconds to ~4-5.
@kubernetes/sig-storage
Marking as 1.3 target, however it does not really matter here, it's just a test.
Previous volume binder code was not able to cope with PVs or PVCs getting
modified during the binding process. Current one should be resilient to
these changes, so let's test it.
It makes the test approximately twice as long as before, from ~2 seconds to
~4-5.
