Automatic merge from submit-queue (batch tested with PRs 55511, 63372, 63400, 63100, 63769). 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>.

k8s.io/client-go/{kubernetes,rest}: remove dependency on pflag

This change removes an unused pflag utility which cuts a client-go transitive dependency on that library.

Verified using `go list`

```
go list -f '{{join .Deps "\n"}}' k8s.io/kubernetes/vendor/k8s.io/client-go/kubernetes \
    | xargs go list -f '{{if not .Standard}}{{.ImportPath}}{{end}}' \
    | grep pflag
```

/cc @sttts @kubernetes/sig-api-machinery-pr-reviews 

Edit: it looks like k8s.io/client-go/tools/clientcmd still imports this. So practically, if you're loading from a kubeconfig you're going to get the import. Might still be a good cleanup to make though.

```release-note
NONE
```

Automatic merge from submit-queue (batch tested with PRs 63787, 62003). 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>.

Fix localport open with --nodeport-addresses specified

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

Fix localport open with --nodeport-addresses specified.

**Which issue(s) this PR fixes**:
Fixes #61953

**Special notes for your reviewer**:

@ephur

**Release note**:

```release-note
Services can listen on same host ports on different interfaces with --nodeport-addresses specified
```

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kubeadm: Use the API machinery for marshalling

**What this PR does / why we need it**:
Similar to https://github.com/kubernetes/kubernetes/pull/63723, we should not use a generic `yaml` 
package for marshalling, but use the API machinery we have already in place. This now correctly includes `apiVersion` and `kind` when printing the configuration in the upgrade procedure.

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Part of https://github.com/kubernetes/community/pull/2131

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```
@kubernetes/sig-cluster-lifecycle-pr-reviews @liztio

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kubeadm - do not generate etcd ca/certs for external etcd

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

Currently we generate an etcd CA and certificates even if we are specifying an external etcd cluster when running `kubeadm init`, this PR changes this behavior to skip generating the etcd CA and certificates if configured for an external etcd cluster.

**Which issue(s) this PR fixes** 
Fixes https://github.com/kubernetes/kubeadm/issues/807

**Release note**:
```release-note
kubeadm will no longer generate an unused etcd CA and certificates when configured to use an external etcd cluster.
```

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Run FSGroup tests by default.

There is no special feature flag for FSGroup and the tests can run in all test suites. They're reasonably fast too.

**Release note**:

```release-note
NONE
```

cc: @jeffvance

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Kubeadm: Update comments and UT to remove /66 restriction

**What this PR does / why we need it**:
The comments in cmd/kubeadm/app/phases/controlplane/manifests.go mention the
IPv6 /66 restriction, and the UT also refers to this.
This restriction was removed in PR#60089
This removes those comments and updates the UT

**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 #62806 

**Special notes for your reviewer**:

**Release note**:

```release-note-none

```

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kubeadm-init: update note about failing containers

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

This PR was merged before all requested changes
were applied:
kubernetes/pull/59731

Update the note about failing containers as requested here:
https://github.com/kubernetes/kubernetes/pull/59731#pullrequestreview-119517427

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
NONE

**Special notes for your reviewer**:
NONE

**Release note**:

```release-note
NONE
```

Automatic merge from submit-queue (batch tested with PRs 63783, 63734). 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 marshal tests

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

Adds tests for the marshalling utilities in kubeadm.

**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#802

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```

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Rename `kubeadmapiext` to the more explicit `kubeadmapiv1alpha1`

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

`kubeadmext` is somewhat confusing to those who read the code (although it means "the external API of kubeadm", which to some degree makes sense), so I'm swapping all references to it to the more explicit `kubeadmapiv1alpha1`. This change is needed given that we will support multiple external APIs.

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Part of https://github.com/kubernetes/community/pull/2131

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```
@kubernetes/sig-cluster-lifecycle-pr-reviews @liztio

Only generate the etcd CA and certificates if not configured for external
etcd.

Automatic merge from submit-queue (batch tested with PRs 63761, 63794, 63649). 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>.

fix missing flag value bindings in kubectl

**What this PR does / why we need it**:
When working #63644, I find there are still some flag not bound correctly.

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
xref #60366

**Special notes for your reviewer**:
/cc soltysh deads2k 
/cc kubernetes/sig-cli-api-reviews 
**Release note**:

```release-note
None
```

Automatic merge from submit-queue (batch tested with PRs 63761, 63794, 63649). 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 unused PrintFlags.Scheme

PrintFlags.Scheme is unused, remove it.

**Release note**:

```release-note
NONE
```

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Avoid copying aggregated admin/edit/view roles during bootstrap

Fixes #63760

At apiserver startup, prior to reconciling cluster roles, the following roles (if they exist) are copied:
* admin -> system:aggregate-to-admin
* edit -> system:aggregate-to-edit
* view -> system:aggregate-to-view

This was added in 1.9 as part of role aggregation to ensure custom permissions added to the admin/edit/view roles were preserved, prior to making the admin/edit/view roles aggregated (since the permissions of an aggregated role are controller-managed)

When starting multiple members of a new HA cluster simultaneously, the following race can occur:
* t=0, server 1,2,3 start up
* t=1, server 1 finds no admin/edit/view roles exist, begins role reconciliation and creates the aggregated `admin` role
* t=2, server 2 finds and copies the `admin` role created by server 1 to `system:aggregate-to-admin`

If this race is encountered, it results in `system:aggregate-to-admin` being an aggregated role, and its permissions subject to being overwritten by the aggregating controller. To prevent this from happening, the permission-preserving copy should only copy over roles that are not yet aggregated.

To correct this in clusters that have already encountered it, role reconciliation should remove aggregation from a role that is not expected to be aggregated at all.

```release-note
corrects a race condition in bootstrapping aggregated cluster roles in new HA clusters
```

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>.

Updated README to include client-go<->controller diagram

The sample-controller makes extensive use of various mechanisms
available in client-go. For writing custom controllers/operators
it will be helpful if there is precise description of how the
client-go library works and how/where it interfaces with
custom controller code.

Recently we published a blog post with these details here:

https://medium.com/@cloudark/kubernetes-custom-controllers-b6c7d0668fdf

This patch includes the diagram from the post, as was recommended
by @sttts on https://github.com/kubernetes/sample-controller/issues/13



**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 62833, 63585). 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 comments for ipset entries in kube-proxy

**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 #63584 

**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>.

Add necessary explanation for container log rotation.

**What this PR does / why we need it**:
#59898
> Container log manager only starts when the container runtime is remote (not docker), because we can't implement ReopenContainerLog for docker.

**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>.

Adds initial Korean translations for kubectl

**What this PR does / why we need it**:
This PR provides a first attempt to translate kubectl in Korean (related to #51867, #40645, #45573, #45562, #40591, #46559, #50155).

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
No issues

**Special notes for your reviewer**:
This PR requires Korean people to assist in the review. I am native in Korean and also a translator & reviewer in Korean in OpenStack I18n team (http://stackalytics.com/?metric=translations&user_id=ianychoi ).

**Release note**:
```release-note
Adding initial Korean translation for kubectl
```

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>.

clean duplicate test function

**What this PR does / why we need it**:
As the patch shows, the function it tests has been moved to 
https://github.com/kubernetes/kubernetes/blob/b87a392b1a7ece8335ad3ade410e5070e29f216e/staging/src/k8s.io/apiserver/pkg/authentication/serviceaccount/util.go#L43
 The make/split function has been tested on file https://github.com/kubernetes/kubernetes/blob/b87a392b1a7ece8335ad3ade410e5070e29f216e/staging/src/k8s.io/apiserver/pkg/authentication/serviceaccount/util_test.go#L21

**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>.

Control exactly what we use in kubeadm

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

we recently got rid of extra arg validation for preflight check:
9f21f5dd

the import-boss configuration will help us control exactly what
gets added/used in kubeadm. In this PR, we add a white-list of
the exact packages we use currently.

We will need to review these, make new PR(s) to  eliminate things
we don't want to be depending on (just like the cloud provider related 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

```

we recently got rid of extra arg validation for preflight check:
9f21f5dd

the import-boss configuration will help us control exactly what
gets added/used in kubeadm. In this PR, we add a white-list of
the exact packages we use currently.

We will need to review these, make new PR(s) to  eliminate things
we don't want to be depending on (just like the cloud provider related code).

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>.

Revisit the OWNERS file for kubeadm

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

The OWNERS file for kubeadm is getting a little bit stale. As discussed in today's SIG Cluster Lifecycle meeting, we're gonna update it with the currently active contributors.

**Special notes for your reviewer**:

Every person that is involved here, please ACK and LGTM the change.

@jbeda removed from approvers
@krousey removed from approvers/reviewers
@fabriziopandini graduated to an approver
@dmmcquay removed from reviewers
@jamiehannaford removed from reviewers
@kargakis removed from reviewers
@liztio added to reviewers
@chuckha added to reviewers
@detiber added to reviewers
@stealthybox added to reviewers
@dixudx added to reviewers

Thank you everyone for your contributions 👏 (no one can't maintain something forever), and congratulations and welcome everyone with a new role, happy to have you here 👍!

**Release note**:

```release-note
NONE
```
cc @kubernetes/sig-cluster-lifecycle-pr-reviews

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register client-go auth plugins for e2e

e2e depends on use of the gcp client-go auth provider, but did not explicitly register the auth provider. it indirectly imported the plugins via a roundabout chain (see https://github.com/kubernetes/kubernetes/issues/63731#issuecomment-388529120) which broke when those imports were trimmed in https://github.com/kubernetes/kubernetes/pull/63673

if e2e requires these auth plugins, it should include them explicitly in the top-level test package

fixes #63731

```release-note
NONE
```

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Removed unused namespace in UT helper func.
Signed-off-by: Da K. Ma <klaus1982.cn@gmail.com>

**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>.

clean unused variables on serviceaccounts_controller_test.go

**What this PR does / why we need it**:
this patch simply removes unused variables 
**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 63686, 63736). 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>.

Fix bad sleep - int as duration

Sleep(2) is probably not what was intended.

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

Automatic merge from submit-queue (batch tested with PRs 63686, 63736). 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>.

Deprecate photon cloud provider

vmware/photon-controller is no longer maintained, as of Oct 2017.

Adds a detail field to deprecatedCloudProviders, meant for pointing to external provider url or other reason for deprecation.



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

The photon cloud provider is no longer supported, need to let users know.

Photon controller support has already been removed from kube-up in PR #58096

**Release note**:

```release-note
NONE
```

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

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: add test coverage to completion.go

**What this PR does / why we need it**:
Add `completion_test.go` with the following tests:
- TestNewCmdCompletion
- TestRunCompletion

A separate commit exports the function GetSupportedShells() to obtain the list of supported shells.

Test coverage is at 96%. The only untested bit is an `io.Writer.Write()` call in `RunCompletion()`. in the case of `bytes.Buffer` it would panic and/or always return `nil` for `error`.

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

NONE

**Special notes for your reviewer**:

NONE

**Release note**:

```release-note
NONE
```

This PR was merged before all requested changes
were applied:
kubernetes/pull/59731

Update the note about failing containers as requested here:
https://github.com/kubernetes/kubernetes/pull/59731#pullrequestreview-119517427

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>.

Report node DNS info with --node-ip

**What this PR does / why we need it**:
This PR adds `ExternalDNS`, `InternalDNS`, and `ExternalIP` info for kubelets with the `--nodeip` flag enabled. 

**Which issue(s) this PR fixes** 
Fixes #63158

**Special notes for your reviewer**:

I added a field to the Kubelet to make IP validation more testable (`validateNodeIP` relies on the `net` package and the IP address of the host that is executing the test.) I also converted the test to use a table so new cases could be added more easily.

**Release Notes**
```release-note
Report node DNS info with --node-ip flag
```

@andrewsykim
@nckturner 

/sig node
/sig network