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Use the logging agent's node name as the metadata agent URL.

The Stackdriver Logging agent should use the node's hostname when it constructs the Stackdriver Metadata Agent's URL, currently, it's using the GKE Master's hostname, which is a bug.

**Release note:**
```release-note
[fluentd-gcp addon] Use the logging agent's node name as the metadata agent URL.
```

Automatic merge from submit-queue (batch tested with PRs 63526, 60371, 63444). 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>.

update garbage collection to use the new dynamic client

Update GC to use the new and easy to use dynamic client.  This is one of two remaining stragglers.

@kubernetes/sig-api-machinery-pr-reviews 
@caesarxuchao @ironcladlou 

```release-note
NONE
```

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Support completion for kubectl cp

**What this PR does / why we need it**: With this PR, kubectl cp supports completion. I tested this PR in bash and zsh.

```
$ kubectl cp kube-system/<tab>
kube-system/kube-state-metrics-769566fdfb-4v52s:   kube-system/kubernetes-dashboard-6b6ddbd46-t5bv9:  kube-system/prometheus-694594c45b-qk5lq:
```

**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/kubectl#5

**Special notes for your reviewer**: @cblecker

**Release note**:

```release-note
`kubectl cp` supports completion.
```

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adding support for VM name with extra Separator String

**What this PR does / why we need it**:
Allows the Azure VM name to have within their name the `_` character

**Special notes for your reviewer**:
This is the error I got before testing
```
May 07 21:55:14 kn-infra000000.<domainname> kubelet[39465]: I0507 21:55:14.462125   39465 azure_vmss.go:108] getVmssVM gets scaleSetName ("kn-infra_ss") and instanceID ("0") for node "kn-infra000000"
May 07 21:55:14 kn-infra000000.<domainname> kubelet[39465]: E0507 21:55:14.462147   39465 azure_vmss_cache.go:52] Failed to extract vmssVMName "kn-infra_ss_0"
May 07 21:55:14 kn-infra000000.<domainname> kubelet[39465]: F0507 21:55:14.462160   39465 kubelet.go:1349] Kubelet failed to get node info: failed to get external ID from cloud provider: not a vmss instance
```

**Release note**:
```release-note
Azure VMSS: support VM names to contain the `_` character
```

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use IOStreams for cli commands

Scrubs the last commands to use IOStreams for consistency and testability.

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

```release-note
NONE
```

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Refactor hard code in rest_test.go

**What this PR does / why we need it**:
Refactor hard code in rest_test.go
**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
```

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modify outdate link in template

**What this PR does / why we need it**:
modify outdate link in template

**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**:

```NONE

```

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Deprecate in-tree OpenStack cloud provider

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

Warn operators and users to switch to the external cloud provider
for openstack.

**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
OpenStack built-in cloud provider is now deprecated. Please use the external cloud provider for OpenStack.
```

Automatic merge from submit-queue (batch tested with PRs 63291, 63490, 60445, 63507, 63524). 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 client based restmappers to client-go

Moves the client-based restmappers to client-go where everyone who needs them can have access.


```release-note
the shortcuts which were moved server-side in at least 1.9 have been removed from being hardcoded in kubectl
```

@kubernetes/sig-cli-maintainers @kubernetes/sig-api-machinery-pr-reviews

Automatic merge from submit-queue (batch tested with PRs 63291, 63490, 60445, 63507, 63524). 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>.

Fixes fake client generation for non-namespaced subresources

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

Fixes code generation for non-namespaced subresources fake clients. 

**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 #60444

**Special notes for your reviewer**:

**Release note**:

```dev-release-note
Fixes fake client generation for non-namespaced subresources
```

/cc @mfojtik @liggitt 

I'm not sure the best way to add tests for this. Any pointers?

Automatic merge from submit-queue (batch tested with PRs 63291, 63490, 60445, 63507, 63524). 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>.

default the ignorenotfound for delete when selecting objects

When selecting resources and then deleting them (as opposed to specifically indicating a resource to delete) we should default to not failing if something disappeared partway through.  This is quite common when label selecting deletes and GC runs before you get to a dependent object.

I also took the liberty of doing complete work in complete instead of validate.

```release-note
`kubectl delete` with selection criteria defaults to ignoring not found errors
```

@kubernetes/sig-cli-maintainers

Automatic merge from submit-queue (batch tested with PRs 63291, 63490, 60445, 63507, 63524). 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

**What this PR does / why we need it**:
clean unused variables on set.go
**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
```

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cleaning up load balancer resources

**What this PR does / why we need it**:
Adds resources cleanup for some LoadBalancer tests.

**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 #63026

**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 up kubelet eviction events

**What this PR does / why we need it**:
This makes eviction events better.  
* Exceeding container disk limits no longer says "node was low on X", since the node isn't actually low on a resource.  The container limit was just exceeded.  Same for pods and volumes.
* Eviction message now lists containers which were exceeding their requests.  This is an event from a container evicted while under memory pressure: 
`reason: 'Evicted' The node was low on resource: memory. Container high-priority-memory-hog was using 166088Ki, which exceeds its request of 10Mi.`
* Eviction messages now displays real resources, when they exist.  Rather than `The node was low on resource: nodefs`, it will now show `The node was low on resource: ephemeral-storage`.

This also cleans up eviction code in order to accomplish this.  We previously had a resource for each signal: e.g. `SignalNodeFsAvailable` mapped to the resource`nodefs`, and `nodefs` maps to reclaim functions, and ranking functions.  Now, signals map directly to reclaim and ranking functions, and signals map to real resources: e.g. `SignalNodeFsAvailable` maps to the resource `ephemeral-storage`, which is what we use in events.
This also cleans up duplicated code by reusing the `evictPod` function.  It also removes the unused signal `SignalAllocatableNodeFsAvailable`.

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

/sig node
/priority important-longterm

/assign @dchen1107 @jingxu97

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Increase scheduler cache generation number monotonically in order to avoid collision

**What this PR does / why we need it**:
Increments the scheduler cache generation number monotonically to avoid collision of the generation numbers. More context in #63262.

**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 #63262.

**Special notes for your reviewer**:

**Release note**:

```release-note
Increase scheduler cache generation number monotonically in order to avoid collision and use of stale information in scheduler.
```

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Cleanup Pods in TestNominatedNodeCleanUp.
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)*:
part of #63427 

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

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passthrough readOnly to subpath

**What this PR does / why we need it**:
If a volume is mounted as readonly, or subpath volumeMount is configured as readonly, then the subpath bind mount should be readonly.

**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 #62752

**Special notes for your reviewer**:

**Release note**:

```release-note
Fixes issue where subpath readOnly mounts failed
```

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//hack:update-mirror: ensure last URL in list is mirrored too

**What this PR does / why we need it**: a small bug in https://github.com/kubernetes/kubernetes/pull/62495 prevented the last URL from mirrored, since there wasn't a trailing newline.

Also, the bazel target printed out if you ran `hack/update-workspace-mirror.sh` directly was incorrect, so that's now fixed.

**Special notes for your reviewer**: buildifier is apparently now formatting bzl files, and I can't figure out how to disable that, so I reformatted this as the first commit.

**Release note**:

```release-note
NONE
```

/assign @BenTheElder 
/cc @rmmh

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gce: plumb --kubelet-certificate-authority flag to apiserver

**What this PR does / why we need it**:
We want to start signing kubelets' serving certs with cluster CA. This
flag is required to enforce that on apiserver side.

**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
```

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[e2e ingress-gce] Change ingress-upgrade test to not check for number of instances

**What this PR does / why we need it**:
From #62710 and #63500, ingress-upgrade test is failing on asserting resources are intact after cluster upgrade because some instances appear to be absent from the instance group.

This PR stubs out the number of instances during verification as that is out of ingress controller's control.

**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 #NONE 

**Special notes for your reviewer**:
/assign @rramkumar1 
cc @bowei 

**Release note**:

```release-note
NONE
```

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kubectl get CRD resources with --server-print=true column name error

**What this PR does / why we need it**:
Here's a bunch of kubectl get command execution and their outputs.
my-crd is the user-define CRD resource.
1. 
```
kubectl get pod --all-namespaces --server-print=true

NAMESPACE   NAME    READY   STATUS  RESTARTS   AGE
test-ns    test-pod  1/1    running     1      15m

```
2. 
```
kubectl get my-crd --all-namespaces --server-print=false

NAMESPACE   NAME      AGE
test-ns    test-crd    21m
```

3.
```
kubectl get my-crd --all-namespaces --server-print=true

NAMESPACE   NAME        CREATED AT
test-ns    test-crd         21m
```

Here's the problem
1. Example 3 isn't consistent with example 1 and 2
2. CREATED AT 21m doesn't make sense

This patch fix this.




**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
```

Warn operators and users to switch to the external cloud provider
for openstack.

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Fixed hack/verify-golint.sh reported errors 

**What this PR does / why we need it**:
Fixes errors reported by `hack/verify-golint.sh` while running `make verify`

**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 #63065 

**Special notes for your reviewer**:
Fixing `hack/verify-gofmt.sh` reported error for `k8s.io/code-generator/cmd/client-gen/generators/client_generator.go` mentioned in #63065 throws error. So didn't modify that file.

**Release note**:

```release-note
NONE
```
/sig-testing-bugs

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gcp: allow non-bootstrap kubeconfig

**What this PR does / why we need it**:
Needed for https://github.com/kubernetes/community/pull/2022
This change lets us generate a non-bootstrap kubeconfig with exec plugin for authn.
The plugin does TLS bootstrapping internally.

**Special notes for your reviewer**:
Defaults when no new env vars are set will behave same as before this change.
`KUBELET_AUTH_TYPE` should never be `tls-auth` in practice, but leaving it there just in case.

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

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Remove cmdutil printer helpers

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

Removes printer helpers from the cmd/util package.
Followup to PrintFlags updates.

cc @deads2k @soltysh

Automatic merge from submit-queue (batch tested with PRs 63488, 63496). 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>.

Improve test coverage of Kubelet file utils

Improves from 30.9% to 77.8%.

```release-note
NONE
```

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Add support for arm64 to the registry action of the kuberntes-worker juju charm.

**What this PR does / why we need it**: Add support for arm64 to the registry action of the kuberntes-worker juju charm.

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