ref:https://github.com/kubernetes/kubernetes/pull/66926

Automatic merge from submit-queue (batch tested with PRs 66058, 66059). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

move apiserver Configuration to k8s.io/apiserver/pkg/apis/config

**What this PR does / why we need it**:
ref [#2354](https://github.com/kubernetes/community/pull/2354)
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #

**Special notes for your reviewer**:
After the related componentconfig  to be moved to staging, LeaderElectionConfiguration and DebuggingConfiguration should be clean up in pkg/apis/componentconfig
**Release note**:

```release-note
NONE
```

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move componentconfig ClientConnectionConfiguration to k8s.io/apimachinery/pkg/apis/config

**What this PR does / why we need it**:
ref [#2354](https://github.com/kubernetes/community/pull/2354)
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #

**Special notes for your reviewer**:
ClientConnectionConfiguration now is used by KubeSchedulerConfiguration in pkg/apis/componentconfig, when KubeSchedulerConfiguration  is moved to staging, ClientConnectionConfiguration should be cleaned up in pkg/apis/componentconfig.
**Release note**:

```release-note
NONE
```

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Update the nginx image with docker.io/nginx image

**What this PR does / why we need it**:
This will update the nginx image to hub.docker.com

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes https://github.com/kubernetes/ingress-nginx/issues/2766

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```

Automatic merge from submit-queue (batch tested with PRs 64815, 66823, 66473, 66466). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

dry-run: Use dry-runnable structure

Creates a structures that decides to either by-pass persistence and tries to reproduce the same behavior (without persistence), or just pass along to storage.

This is obviously not finished, I'm would like to get feedback on the direction, is this the direction we'd like to go?

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

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #

**Special notes for your reviewer**:

**Release note**:
```release-note
NONE
```

Automatic merge from submit-queue (batch tested with PRs 64815, 66823, 66473, 66466). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Clean up unused code

**What this PR does / why we need it**:
Clean up the unused duplicate code.
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```

Automatic merge from submit-queue (batch tested with PRs 64815, 66823, 66473, 66466). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

kubeadm: fix ImagePullCheck output

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

ImagePullCheck outputs "pulling <image>" line even if image
already exists and is not pulled.
    
Fixed the output to reflect the reality. ImagePullCheck now outputs
either "pulling <image>" or "image <image> exists".

**Release note**:
```release-note
NONE
```

Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

error out empty hostname

**What this PR does / why we need it**:
For linux, the hostname is read from file `/proc/sys/kernel/hostname` directly, which can be overwritten with whitespaces.

Should error out such invalid hostnames.

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes kubernetes/kubeadm#835

**Special notes for your reviewer**:
/cc luxas timothysc 

**Release note**:

```release-note
nodes: improve handling of erroneous host names
```

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Fix some test images - update version and arch

- gb-frontend and gb-redisslave are now *REALLY* multi-arch manifest
lists.
- Fix bad merge from #66066 for AdmissionWebhook

Change-Id: I0995394d638ab00b0d1d30ad7099351b806dfd9d



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

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```

Automatic merge from submit-queue (batch tested with PRs 66933, 66925). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Rework multi-volume test to use StatefulSet

**What this PR does / why we need it**:
The e2e test that got added as part of https://github.com/kubernetes/kubernetes/pull/66832 fails in a multi-zone environment because the volumes get provisioned in random zones.  This PR reworks the test to use StatefulSet instead, which handles provisioning multiple PVCs in the same zone.

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```

Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

switching rolling update to external clients

Switches rolling update to use external clients.  This is a pretty strange looking command.

@kubernetes/sig-cli-maintainers 
/assign @soltysh 

```release-note
NONE
```

Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Removed unused functions.
Signed-off-by: Da K. Ma <klaus1982.cn@gmail.com>

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #

**Special notes for your reviewer**:

**Release note**:
```release-note
None
```

Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

stop adding internal types to external schemes

at some point someone starting internal types to external schemes in kubectl tests.  This fixes that mistake.

@kubernetes/sig-cli-maintainers 
/assign @soltysh 

```release-note
NONE
```

Automatic merge from submit-queue (batch tested with PRs 61389, 66817, 66903, 66675, 66965). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

 remove internal client factory method

remove final uses of the internal client factory method.  https://github.com/kubernetes/kubernetes/pull/66933 does the rolling updater, so this just snips it off and prevents anyone else from ever relying on it.

@kubernetes/sig-cli-maintainers 
/assign @soltysh 

```release-note
NONE
```

Automatic merge from submit-queue (batch tested with PRs 61389, 66817, 66903, 66675, 66965). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Provide an option to supply log-file mount option for gluster plugin.

At present, `log-file` location of glusterfs client mount is decided
by the plugin, however at times, users/admin want to configure log-file
of gluster fuse client process on their own in some setups. Even though they can pass log-file
mount option through storage class, before this patch glusterfs plugin
always discard it. This patch enable/give preference
to admin supplied log-file mount option if specified in storage class.
If the log-file mount option is incomplete or wrong, plugin fallback to the
location which is carved out by the combination of pvc and pod name.
Signed-off-by: Humble Chirammal <hchiramm@redhat.com>



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

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #

**Special notes for your reviewer**:

**Release note**:

```release-note

```

Automatic merge from submit-queue (batch tested with PRs 61389, 66817, 66903, 66675, 66965). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Scalability tests: Increase sample size for pod startup latency measurement

**What this PR does / why we need it**:
This PR adds a way to increase a sample size used in pod startup latency measurement. We found that this phase is flaky and want to check if increasing a number of samples will help reducing a flakiness.


**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```

Automatic merge from submit-queue (batch tested with PRs 61389, 66817, 66903, 66675, 66965). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

remove deprecated shorthand flag

**Release note**:
```release-note
remove deprecated shorthand flag `-c` from `kubectl version (--client)`
```

Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

csiAttacher: check deviceMountPath before hasStageUnstageCapability

csiAttacher#MountDevice: it is better to check `deviceMountPath` before `hasStageUnstageCapability`

**Release note**:
```
NONE
```
/release-note-none
/kind cleanup
/sig storage

Automatic merge from submit-queue (batch tested with PRs 66822, 65983). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

apiextensions-apiserver: enable etcd_object_count metrics for CustomResources

~~This leaks one go routine per CRD that is deleted~~ The stop channel is wired already. We should not have the leak of the go routine:
https://github.com/kubernetes/kubernetes/blob/d10e08fc897f6b5e60ce2aa8420bd2ea536e18b8/staging/src/k8s.io/apiserver/pkg/registry/generic/registry/store.go#L1379

```release-note
Added etcd_object_count metrics for CustomResources.
```

Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

kubeadm: fix runtime.ImageExists API

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

runtime.ImageExists returns error when underlying 'inspect' command
fails. This makes ImagePullCheck to fail as it doesn't expect
runtime.ImageExists to return an error even if image doesn't exist.

**Which issue(s) this PR fixes**:
Fixes [kubeadm issue 1024](https://github.com/kubernetes/kubeadm/issues/1024)

**Release note**:
```release-note
NONE
```

Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

kernel_validator: amend kernel config check paths

**What this PR does / why we need it**:
Clear Linux Project for Intel Architecture uses its own path
to store kernel build artifacts. This PR amends the path to kernel validator's 
config check paths.

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #

**Special notes for your reviewer**:

**Release note**:

```
e2e_node:  add new kernel config check paths
```

Automatic merge from submit-queue (batch tested with PRs 66911, 66841). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Make kubectl describe more tolerant of newlines

Newlines in the `command`, `args`, `env.value`, or `annotations` fields are not uncommon. Wrap and indent these fields so that describe is more readable.

Before:

```
    Host Port:     <none>
    Command:
      /bin/bash
      -c
      #!/bin/bash
set -euo pipefail

# set by the node image
unset KUBECONFIG

trap 'kill $(jobs -p); exit 0' TERM

# track the current state of the config
```

After:

```
    Host Port:     <none>
    Command:
      /bin/bash
      -c
      #!/bin/bash
      set -euo pipefail

      # set by the node image
      unset KUBECONFIG

      trap 'kill $(jobs -p); exit 0' TERM

      # track the current state of the config
```

Annotations when wrapping:

```
Annotations:  kubectl.kubernetes.io/desired-replicas: 1
              openshift.io/deployer-pod.completed-at: 2018-07-31 22:47:15 +0000 UTC
              openshift.io/deployer-pod.created-at: 2018-07-31 22:37:11 +0000 UTC
              openshift.io/deployer-pod.name: test-3-deploy
              openshift.io/deployment-config.latest-version: 3
              openshift.io/deployment-config.name: test
              openshift.io/deployment.phase: Failed
              openshift.io/deployment.replicas: 0
              openshift.io/deployment.status-reason: manual change
              openshift.io/encoded-deployment-config:
                {"kind":"DeploymentConfig","apiVersion":"apps.openshift.io/v1","metadata":{"name":"test","namespace":"clayton-dev","selfLink":"/apis/apps.op...
```

```release-note
Handle newlines for `command`, `args`, `env`, and `annotations` in `kubectl describe` wrapping
```

Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Add e2e tests to test scope selectors with non-priorityclass scopes

xref: https://github.com/kubernetes/kubernetes/issues/66673

**Release note**:

```release-note
None
```
/cc @kubernetes/sig-scheduling-pr-reviews @derekwaynecarr @ravisantoshgudimetla @aveshagarwal @sjenning 
/sig scheduling

Automatic merge from submit-queue (batch tested with PRs 62901, 66562, 66938, 66927, 66926). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

 snip legacy scheme uses we don't need

the legacy scheme covers the kubectl scheme. This pull converts many of the "simple" ones we can clear. I also cleared out create entirely.

@kubernetes/sig-cli-maintainers 
/assign @soltysh @juanvallejo 

```release-note
NONE
```

Automatic merge from submit-queue (batch tested with PRs 62901, 66562, 66938, 66927, 66926). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

snip links to internal clients

This is just an example of snipping links to the internal client from k/k.  There are four more direct links to the factory method to create the internal and order of a dozen imports.

@kubernetes/sig-cli-maintainers 
/assign @soltysh @juanvallejo 

```release-note
NONE
```