Automatic merge from submit-queue (batch tested with PRs 52007, 52196, 52169, 52263, 52291)
Fixed CCM service controller start jitter
**What this PR does / why we need it**: The start jitter for the service controller was running regardless if the service controller was being ran. This should help startup time for CCM's without the service controller implementation.
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
/cc @wlan0 @andrewsykim @luxas @jhorwit2
/area cloudprovider
/sig cluster-lifecycle
Automatic merge from submit-queue (batch tested with PRs 50289, 52106)
Honor --use-service-account-credentials in cloud-controller-manager
If --use-service-account-credentials is specified, the cloud controller manager should honor it
The distinction between the rootclientbuilder and the clientbuilder came from kube-controller-manager, which is responsible for running the very controllers that enable service accounts. That two-layer approach is not needed in the cloud-controller-manager.
```release-note
The `kube-cloud-controller-manager` flag `--service-account-private-key-file` was non-functional and is now deprecated.
The `kube-cloud-controller-manager` flag `--use-service-account-credentials` is now honored consistently, regardless of whether `--service-account-private-key-file` was specified.
```
Automatic merge from submit-queue (batch tested with PRs 51574, 51534, 49257, 44680, 48836)
Add a persistent volume label controller to the cloud-controller-manager
Part of https://github.com/kubernetes/features/issues/88
Outstanding concerns needing input:
- [x] Why 5 threads for controller processing?
- [x] Remove direct linkage to aws/gce cloud providers [#51629]
- [x] Modify shared informers to allow added event handlers ability to include uninitialized objects/using unshared informer #48893
- [x] Use cache.MetaNamespaceKeyFunc in event handler?
I'm willing to work on addressing the removal of the direct linkage to aws/gce after this PR gets in.
Automatic merge from submit-queue (batch tested with PRs 48264, 48324, 48125, 47944, 47489)
remove unneeded variable
Signed-off-by: Ma Shimiao <mashimiao.fnst@cn.fujitsu.com>
**What this PR does / why we need it**:
small fix, remove unneeded variable
**Release note**:
```release-note
NONE
```
Automatic merge from submit-queue
Make controller-manager resilient to stale serviceaccount tokens
Now that the controller manager is spinning up controller loops using service accounts, we need to be more proactive in making sure the clients will actually work.
Future additional work:
* make a controller that reaps invalid service account tokens (c.f. https://github.com/kubernetes/kubernetes/issues/20165)
* allow updating the client held by a controller with a new token while the controller is running (c.f. https://github.com/kubernetes/kubernetes/issues/4672)
Dong Liu