Automatic merge from submit-queue (batch tested with PRs 51480, 49616, 50123, 50846, 50404)

Add KUBE_APISERVER_REQUEST_TIMEOUT_SEC env var.

Cluster startup support for the flag added by #51415.  I won't merge until that PR merges.

Bug: #51355

cc @jpbetz

Automatic merge from submit-queue (batch tested with PRs 51707, 51662, 51723, 50163, 51633)

update GC controller to wait until controllers have been initialized …

fixes #51013

Alternative to https://github.com/kubernetes/kubernetes/pull/51492 which keeps those few controllers (only one) from starting the informers early.

Automatic merge from submit-queue (batch tested with PRs 51707, 51662, 51723, 50163, 51633)

Change SizeLimit to a pointer

This PR fixes issue #50121

```release-note
The `emptyDir.sizeLimit` field is now correctly omitted from API requests and responses when unset.
```

Automatic merge from submit-queue (batch tested with PRs 51707, 51662, 51723, 50163, 51633)

Add bowei to the OWNER for cluster/gce

```release-note
NONE
```

Automatic merge from submit-queue (batch tested with PRs 51707, 51662, 51723, 50163, 51633)

Adding vishh to test/ reviewers and approvers

Rationale: Reviewing/Shepherding lots of features/PRs around node and resource management.

Automatic merge from submit-queue (batch tested with PRs 51707, 51662, 51723, 50163, 51633)

Make feature gate threadsafe

Fixes #51548 caused by #51436

If set, connect it to kube-apiserver's --request-timeout flag.

Automatic merge from submit-queue

Improve 1.7.5 changelog

- Fix changelog to add discovery and controller-manager fixes
- Add more detail to entries that said "automated cherrypick"

Revert "Enable batch/v1beta1.CronJobs by default"

Improve release notes for entries that say "automated cherrypick".

Automatic merge from submit-queue

fix some bad URL in the /cluster/uju/layers/kubernetes-e2e/README.md

**What this PR does / why we need it**:

There are some bad URL when I read the file and I have fix it.

**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**:

```
NONE
```

Signed-off-by: Vishnu kannan <vishnuk@google.com>

Automatic merge from submit-queue (batch tested with PRs 50775, 51397, 51168, 51465, 51536)

Fix typo in API docs

Typo fix for https://github.com/kubernetes/kubernetes/pull/47019#discussion_r135780591

xref #47019

CC @jessfraz @simo5

Automatic merge from submit-queue (batch tested with PRs 50775, 51397, 51168, 51465, 51536)

Enable batch/v1beta1.CronJobs by default

This PR moves to CronJobs beta entirely, enabling `batch/v1beta1` by default.

Related issue: #41039 

@erictune @janetkuo ptal

```release-note
Promote CronJobs to batch/v1beta1.
```

Automatic merge from submit-queue (batch tested with PRs 50775, 51397, 51168, 51465, 51536)

Allow bearer requests to be proxied by kubectl proxy

Use a fake transport to capture changes to the request and then surface
them back to the end user.

Fixes #50466

@liggitt no tests yet, but works locally

Automatic merge from submit-queue (batch tested with PRs 50775, 51397, 51168, 51465, 51536)

refactor function in controllermanager.go 

**What this PR does / why we need it**:

This piece of code is an independent function and we should separate it from the original function.And it will  be more readable and reasonable.  

**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**:

```
NONE
```

Automatic merge from submit-queue

client-go: Make conditionalTransport a WrapperRoundTripper

**What this PR does / why we need it**:
Fixes broken GKE test: https://k8s-gubernator.appspot.com/builds/kubernetes-jenkins/logs/ci-kubernetes-e2e-gke/

**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
```

Automatic merge from submit-queue

Fix godoc comments

This PR fixes godoc comments.

CC @simo5

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Add local ephemeral storage support in LimitRange

**Special notes for your reviewer**:
For a single local ephemeral storage resource

xref #43607 

**Release note**:
```release-note
Add local ephemeral storage support to LimitRange
```

/assign @jingxu97 
cc @ddysher

generated files

This PR fixes issue #50121

Automatic merge from submit-queue

Only list hollow-node pods while trying to count them

Otherwise it's counting 1 extra due to heapster pod.

Automatic merge from submit-queue

AWS: check validity of KSM key before creating a new encrypted disk.

AWS CreateVolume call does not check if referenced encryption key actually exists and returns a valid new AWS EBS volume even though an invalid key was specified. Later on it removes the EBS silently when its encryption fails.

To work around this buggy behavior we manually check that the key exists before calling CreateVolume.

Fixes #48438

/sig aws

Please review carefully. Can we safely assume that Kubernetes controller-manager can read encryption keys?

```release-note
aws: Kubernetes now checks existence of provided KSM (Key Management Service) key before creating an encrypted AWS EBS.
```

Automatic merge from submit-queue

e2e: Add tests for network tiers in GCE

This test depends on #51301, which adds the new feature. Only the `e2e: Add tests for network tiers in GCE` commit is new.
#51301 should pass this new test.

Automatic merge from submit-queue

Retry master instance creation in case of retriable error (with sleep)

To help with our 5k-node CI tests failing to startup the cluster.
And also towards the greater goal - https://github.com/kubernetes/kubernetes/issues/43140

cc @kubernetes/sig-scalability-misc @kubernetes/sig-cluster-lifecycle-misc

Automatic merge from submit-queue (batch tested with PRs 51439, 51361, 51140, 51539, 51585)

[Scheduler] regroup imports
Signed-off-by: sakeven <jc5930@sina.cn>



**What this PR does / why we need it**:

>Imports are organized in groups, with blank lines between them. The standard library packages are always in the first group.

**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**:

```
NONE
```

Automatic merge from submit-queue (batch tested with PRs 51439, 51361, 51140, 51539, 51585)

Enable alpha GCE disk API

This PR builds on top of #50467 to allow the GCE disk API to use either the alpha or stable APIs.

CC @freehan

Automatic merge from submit-queue (batch tested with PRs 51439, 51361, 51140, 51539, 51585)

CPU manager interfaces.

Please review / merge #51132 first.
Blocker for CPU manager #49186 (3 of 6)

@sjenning @derekwaynecarr

Automatic merge from submit-queue (batch tested with PRs 51439, 51361, 51140, 51539, 51585)

Iscsi handle failed mount

**What this PR does / why we need it**:

**Which issue this PR fixes**: fixes #50556

**Special notes for your reviewer**:

**Release note**:

```release-note
None
```

Automatic merge from submit-queue (batch tested with PRs 51439, 51361, 51140, 51539, 51585)

Fix list-features script

Automatic merge from submit-queue (batch tested with PRs 47054, 50398, 51541, 51535, 51545)

e2e/integration: simplify deepcopy calls