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...
with StorageClass.Provisioner == <unknown plugin>, we should wait for
either external provisioner or volume admin to provide a PV for a claim
instead of reporting an error.
Fixes#31723
Currently kubelet volume management works on the concept of desired
and actual world of states. The volume manager periodically compares the
two worlds and perform volume mount/unmount and/or attach/detach
operations. When kubelet restarts, the cache of those two worlds are
gone. Although desired world can be recovered through apiserver, actual
world can not be recovered which may cause some volumes cannot be cleaned
up if their information is deleted by apiserver. This change adds the
reconstruction of the actual world by reading the pod directories from
disk. The reconstructed volume information is added to both desired
world and actual world if it cannot be found in either world. The rest
logic would be as same as before, desired world populator may clean up
the volume entry if it is no longer in apiserver, and then volume
manager should invoke unmount to clean it up.
Also, fix unit tests to have the same claim and volume sizes in most of the
tests where we don't test matching based on size and test for a specific size
when we do actually test the matching.
Automatic merge from submit-queue
Stabilize volume unit tests by waiting for exact state
Wait for specific final state instead of waiting for specific number of
operations in controller unit tests. The tests are more readable and will survive
random goroutine ordering (PV and PVC controller have both their own
goroutine).
@kubernetes/sig-storage
According to the documentation for Go package time, `time.Ticker` and
`time.Timer` are uncollectable by garbage collector finalizers. They
leak until otherwise stopped. This commit ensures that all remaining
instances are stopped upon departure from their relative scopes.
Wait for specific final state instead of waiting for specific number of
operations in volume unit tests. The tests are more readable and will survive
random goroutine ordering (PV and PVC controller have both their own
goroutine).
