Automatic merge from submit-queue (batch tested with PRs 53689, 56880, 55856, 59289, 60249). 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>.

simplify defer statement

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

simplify defer statement

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>.

Remove old featureGate flag in Readme

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

This PR corrects the Readme for ipvs mode: https://github.com/kubernetes/kubernetes/blob/master/pkg/proxy/ipvs/README.md. `kubeadm init` doesn't support the `--feature-gates=SupportIPVSProxyMode=true` flag anymore since IPVS is in beta and not alpha anymore.


```
sudo kubeadm init --help
Run this command in order to set up the Kubernetes master.

Usage:
  kubeadm init [flags]

Flags:
      --apiserver-advertise-address string      The IP address the API Server will advertise it's listening on. Specify '0.0.0.0' to use the address of the default network interface.
      --apiserver-bind-port int32               Port for the API Server to bind to. (default 6443)
      --apiserver-cert-extra-sans stringSlice   Optional extra Subject Alternative Names (SANs) to use for the API Server serving certificate. Can be both IP addresses and DNS names.
      --cert-dir string                         The path where to save and store the certificates. (default "/etc/kubernetes/pki")
      --config string                           Path to kubeadm config file. WARNING: Usage of a configuration file is experimental.
      --cri-socket string                       Specify the CRI socket to connect to. (default "/var/run/dockershim.sock")
      --dry-run                                 Don't apply any changes; just output what would be done.
      --feature-gates string                    A set of key=value pairs that describe feature gates for various features. Options are:
CoreDNS=true|false (ALPHA - default=false)
DynamicKubeletConfig=true|false (ALPHA - default=false)
SelfHosting=true|false (ALPHA - default=false)
StoreCertsInSecrets=true|false (ALPHA - default=false)
      --ignore-preflight-errors stringSlice     A list of checks whose errors will be shown as warnings. Example: 'IsPrivilegedUser,Swap'. Value 'all' ignores errors from all checks.
      --kubernetes-version string               Choose a specific Kubernetes version for the control plane. (default "stable-1.9")
      --node-name string                        Specify the node name.
      --pod-network-cidr string                 Specify range of IP addresses for the pod network. If set, the control plane will automatically allocate CIDRs for every node.
      --service-cidr string                     Use alternative range of IP address for service VIPs. (default "10.96.0.0/12")
      --service-dns-domain string               Use alternative domain for services, e.g. "myorg.internal". (default "cluster.local")
      --skip-token-print                        Skip printing of the default bootstrap token generated by 'kubeadm init'.
      --token string                            The token to use for establishing bidirectional trust between nodes and masters.
      --token-ttl duration                      The duration before the bootstrap token is automatically deleted. If set to '0', the token will never expire. (default 24h0m0s)
```

**Special notes for your reviewer**:
Used kubeadm version:

```bash
sudo kubeadm version
kubeadm version: &version.Info{Major:"1", Minor:"9", GitVersion:"v1.9.3", GitCommit:"d2835416544f298c919e2ead3be3d0864b52323b", GitTreeState:"clean", BuildDate:"2018-02-07T11:55:20Z", GoVersion:"go1.9.2", Compiler:"gc", Platform:"linux/amd64"}
```

**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>.

fix broken link

**What this PR does / why we need it**:
fix broken link
**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 (batch tested with PRs 59333, 59940). 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>.

implement token authenticator for new id tokens

part of https://github.com/kubernetes/kubernetes/issues/58790

```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>.

kubelet: setup WindowsContainerResources for windows containers

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

This PR setups WindowsContainerResources for windows containers. It implements proposal here: https://github.com/kubernetes/community/pull/1510.

**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 #56734

**Special notes for your reviewer**:

**Release note**:

```release-note
WindowsContainerResources is set now for windows containers
```

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>.

GCE: support Cloud TPU API in cloud provider

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

This PR adds the support for Cloud TPU API in GCE cloud provider.

**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
GCE: support Cloud TPU API in cloud provider
```

/assign @vishh 
/assign @cheftako

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 FailedPostStartHook error message.

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

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #54671

**Special notes for your reviewer**:
/cc @derekwaynecarr 
cc @lovejoy @OJezu

**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>.

Update gke nvidia-gpu-device-plugin to the latest version that supports

both v1alpha and v1beta1 device plugin versions.
Re-enables nvidia-gpus e2e test after verifying the test passes now.



**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 60157, 60337, 60246, 59714, 60467). 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>.

don't (remote) cache release-tars

**What this PR does / why we need it**: Disables Bazel *remote* caching for release tarballs. These are large, low hit rate build outputs. Before we enable remote caching for *builds* we should tag these type of outputs. `pull-kubernetes-bazel-test` already has this enabled and dropped in execution time by 70-80%

**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**: See https://github.com/kubernetes/test-infra/issues/6808 for details on the remote caching. This should not affect local builds.  See the following for docs on this change: https://docs.bazel.build/versions/master/remote-caching.html#exclude-specific-targets-from-using-the-remote-cache

**Release note**:

```release-note
NONE
```

Automatic merge from submit-queue (batch tested with PRs 60157, 60337, 60246, 59714, 60467). 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>.

util/goroutinemap code cleanup

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

code cleanup

**Release note**:

```release-note
NONE
```

Automatic merge from submit-queue (batch tested with PRs 60157, 60337, 60246, 59714, 60467). 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>.

backoff runtime errors in kubelet sync loop

The runtime health check can race with PLEG's first relist, and this
often results in an unnecessary 5 second wait during Kubelet bootstrap.

This change aims to improve the performance.

```release-note
NONE
```

Automatic merge from submit-queue (batch tested with PRs 60157, 60337, 60246, 59714, 60467). 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>.

Feature gate for regional PDs

**What this PR does / why we need it**: Adding beta feature gate around regional PD support.

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*: Partially addresses #59988

**Special notes for your reviewer**: This feature has already been in alpha for two releases, but at the time it was not gated with a Kubernetes feature gate. Instead it was controlled by a GCE-specific alpha gate. However, there are additional changes with GCE PD StorageClass parameters that we'd like to gate as well, and this is out of scope of GCE alpha gates.

/cc @saad-ali @lavalamp

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>.

Update kubectl describe to print out PV node affinity

**What this PR does / why we need it**:
Print out PV NodeAffinity in kubectl describe.

Sample output:
```
Name:            example-local-pv
Labels:          foo1=bar1
                 foo2=bar2
Annotations:     <none>
Finalizers:      []
StorageClass:    local-storage
Status:          Available
Claim:
Reclaim Policy:  Delete
Access Modes:    RWO
Capacity:        5Gi
Node Affinity:
  Required Terms:
    Term 0:  kubernetes.io/hostname in [my-node]
             foo1 in [bar1, bar2]
    Term 1:  foo2 exists
Message:
Source:
    Type:  LocalVolume (a persistent volume backed by local storage on a node)
    Path:  /mnt/disks/ssd1
Events:    <none>
```

No NodeAffinity is set:
```
Name:            nfs
Labels:          <none>
Annotations:     <none>
Finalizers:      []
StorageClass:    
Status:          Available
Claim:           
Reclaim Policy:  Retain
Access Modes:    RWX
Capacity:        1Mi
Node Affinity:   <none>
Message:         
Source:
    Type:      NFS (an NFS mount that lasts the lifetime of a pod)
    Server:    10.244.1.4
    Path:      /exports
    ReadOnly:  false
Events:        <none>
```

**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 #60119

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```

Automatic merge from submit-queue (batch tested with PRs 59365, 60446, 60448, 55019, 60431). 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>.

Use feature-gates command line for kube-proxy

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

Avoid throwing `featureGates:` into the kube-proxy yaml, since it's
not in the right format. It should be

```
    featureGates:
      AllAlpha: true
```

Since FEATURES_GATES is set to `AllAlpha=true`, we can't just throw that
into the yaml file. Just pass along FEATURES_GATES in the command line
instead just like we do for all other services

**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 #60426

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```

Automatic merge from submit-queue (batch tested with PRs 59365, 60446, 60448, 55019, 60431). 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>.

auth: allow nodes to create tokens for svcaccts of pods

ref https://github.com/kubernetes/kubernetes/issues/58790

running on them. nodes essentially have the power to do this today
but not explicitly. this allows agents using the node identity to
take actions on behalf of local pods.

@kubernetes/sig-auth-pr-reviews @smarterclayton 

```release-note
The node authorizer now allows nodes to request service account tokens for the service accounts of pods running on them.
```

Automatic merge from submit-queue (batch tested with PRs 59365, 60446, 60448, 55019, 60431). 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>.

Let image manager return a copy of image list.

Fixes https://github.com/kubernetes/kubernetes/issues/60443.
/cc @kubernetes/sig-node-pr-reviews 

**Release note**:

```release-note
none
```

Automatic merge from submit-queue (batch tested with PRs 59365, 60446, 60448, 55019, 60431). 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 dep-reviewers

**What this PR does / why we need it**:
The dep-reviewers group seems to get assigned PRs early the the review process. However, most code changes should be reviewed in the importing part of the code base first, and then assigned to an approver after.

By removing the reviewers group, the approvers plugin will still suggest assigning to an approver, but won't assign for review when the PR is initially opened.

**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>.

Fix StatefulSet set-based selector bug

**What this PR does / why we need it**:
ControllerRevisions were using selectors as the labels, in case of set-based selectors, the helper function to convert selectors to labels would break. This PR uses pod labels for ControllerRevision labels instead of selectors.
**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 #59266

**Special notes for your reviewer**:
I'm trying to learn Kubernetes codebase and would be happy to make changes if anything is off.
**Release note**:

```release-note
Fix StatefulSet to work with set-based selectors.
```

Automatic merge from submit-queue (batch tested with PRs 60430, 60115, 58052, 60355, 60116). 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 Garbage Collector e2e conformance tests

**What this PR does / why we need it**:
The garbage collector is a core component of kubernetes and needs to be tested by conformance, so its functionality can be relied on in any kubernetes environment.

As we can see in [testgrid](https://k8s-testgrid.appspot.com/sig-api-machinery#gce), the garbage collector tests being promoted by this PR are consistently passing. And the intention to promote them to conformance tests was laid out by [this document](https://docs.google.com/document/d/1h2S9ff9N-4MKqfayE3A8TqjD_qIwuND_dAhOAJFxYS0)

**Special notes for your reviewer**:
The last two tests in this file are not added as conformance tests because they involve beta features (custom resources and cronjobs), and conformance tests are only allowed for features in GA.

**Release note**:
```release-note
New conformance tests added for the Garbage Collector
```

Automatic merge from submit-queue (batch tested with PRs 60430, 60115, 58052, 60355, 60116). 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 cli example

ref: https://github.com/kubernetes/kubernetes/pull/60210

/assign @deads2k 

**Release note**:

```release-note
NONE
```

Automatic merge from submit-queue (batch tested with PRs 60430, 60115, 58052, 60355, 60116). 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 nodeport ip configurable

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

By default, kube-proxy accepts everything from NodePort without any filter. It can be a problem for nodes which has both public and private NICs, and people only want to provide a service in private network and avoid exposing any internal service on the public IPs.

This PR makes nodeport ip configurable.

**Which issue(s) this PR fixes**:
Closes: #21070

**Special notes for your reviewer**:

Design proposal see: https://github.com/kubernetes/community/pull/1547

Issue in feature repo: https://github.com/kubernetes/features/issues/539

**Release note**:

```release-note
Make NodePort IP addresses configurable
```

Automatic merge from submit-queue (batch tested with PRs 60430, 60115, 58052, 60355, 60116). 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>.

CSI MountDevice/UnmountDevice Implementation

Fixes #60114

**What this PR does / why we need it**:
This PR Implements MountDevice and UnmountDevice for the CSI Plugin, the functions will call through to NodeStageVolume/NodeUnstageVolume for CSI plugins.

/sig storage

```release-note
Implements MountDevice and UnmountDevice for the CSI Plugin, the functions will call through to NodeStageVolume/NodeUnstageVolume for CSI plugins.
```

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>.

don't use storage cache during apiserver unit test

General apiserver unit tests don't need to test the caching storage.  It also leaks a bunch a goroutines which does bad things with race detection on and caused timeouts when upgrading etcd.

@kubernetes/sig-api-machinery-bugs 
@sttts you can try pulling this in.
@liggitt doesn't affect "normal" runtime, which is why we only see it during tests.  See relax.

Automatic merge from submit-queue (batch tested with PRs 60433, 59982, 59128, 60243, 60440). 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>.

kubelet: fix bug where character device is not recognized

**What this PR does / why we need it**:
Fixes a bug where character devices are not recognized by the kubelet because we return `FileTypeBlockDev` instead of `FileTypeCharDev`.

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Related issue: https://github.com/kubernetes/kubernetes/issues/5607

**Special notes for your reviewer**:
Kubelet event for bug: https://github.com/kubernetes/kubernetes/issues/5607#issuecomment-366366340
```
Warning		FailedMount		MountVolume.SetUp failed for volume "dev-fuse" : hostPath type check failed: /dev/fuse is not a character device
```

Commit where bug was introduced: https://github.com/kubernetes/kubernetes/commit/57ead4898b850037c9544e034a5e5cc8420990ad 
**Release note**:
```release-note
Fixes a bug where character devices are not recongized by the kubelet
```

Automatic merge from submit-queue (batch tested with PRs 60433, 59982, 59128, 60243, 60440). 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>.

Implement external metric in HPA

This implement the changes to HPA introduced in https://github.com/kubernetes/kubernetes/pull/60096

Automatic merge from submit-queue (batch tested with PRs 60433, 59982, 59128, 60243, 60440). 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>.

[fluentd-gcp addon] Update to use Stackdriver Agent image.

Update the fluentd DaemonSet to use the Stackdriver Logging Agent container image. 
The Stackdriver Logging Agent container image uses fluentd v0.14.25.
We add a special label to each log record as a signal to logging backends to handle both new and legacy resource types.

**Release note:**
```release-note
[fluentd-gcp addon] Switch to the image, provided by Stackdriver.
```

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>.

[e2e ingress-gce] Enhance cleanup logic for pre-shared-cert test

**What this PR does / why we need it**:
Pre-shared-cert test are flaky (https://k8s-testgrid.appspot.com/sig-network-gce#ingress-gce-e2e&width=5), mostly due to the orphaned ssl cert.

This PR enhances the cleanup logic to continue deleting the orphaned cert for this case (without this test will panic on TryDeleteIngress if no ingress is created).

**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 

**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>.

Validate path in external metric name

Add validation following comments on https://github.com/kubernetes/kubernetes/pull/60220

Automatic merge from submit-queue (batch tested with PRs 59310, 60424, 60308, 60436, 60020). 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 kubelet flag generation from the node to the client

Pass the kubelet flags through a new variable in kube-env (KUBELET_ARGS).

Remove vars from kube-env that were only used for kubelet flags.

This will make it simpler to gradually migrate to dynamic kubelet
config, because we can gradually replace flags with config file
options in a single place without worrying about the plumbing to
move variables from the client onto the node.

/cc @verult (re: https://github.com/kubernetes/kubernetes/pull/58171)

**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
action required: [GCP kube-up.sh] Some variables that were part of kube-env are no longer being set (ones only used for kubelet flags) and are being replaced by a more portable mechanism (kubelet configuration file). The individual variables in the kube-env metadata entry were never meant to be a stable interface and this release note only applies if you are depending on them.
```

Automatic merge from submit-queue (batch tested with PRs 59310, 60424, 60308, 60436, 60020). 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>.

Reduce number of pods created for local PV stress test

**What this PR does / why we need it**:
Local PV stress test is flaking.  Failed runs show that test is timing out at 47/50 pods.  Reduce the number of pods created by the test so that it's not so close to the max timeout.

**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**:
I'll need to investigate further to see why processing the pods is so slow and ways to speed it up.  But for now, try to reduce flaking.

**Release note**:

```release-note
NONE
```

Automatic merge from submit-queue (batch tested with PRs 59310, 60424, 60308, 60436, 60020). 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 potential issues and bugs in hack/lib/*.sh scripts using shellcheck

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

This PR is continuing the work for cleaning up the shell scripts using shellcheck and manual inspection. The plan is to make the scripts more robust in case for unexpected input and also to fix potential bugs.

**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**:

The changes are for scripts in `hack/lib/` directory, and as library scripts are used from multiple places. It is not trivial to see all possible places from where the scripts are accessed, so careful review is needed. I tried to make sure that the changes would be compatible for older bash versions too.

**Release note**:

```release-note
NONE
```

Automatic merge from submit-queue (batch tested with PRs 59310, 60424, 60308, 60436, 60020). 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 support for external metrics in kubectl

**What this PR does / why we need it**:
Add support for metrics coming from external sources when describing or printing horizontal pod autoscaler objects. API change: #60096

@MaciekPytel @DirectXMan12 

**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>.

 refactor volume util files

**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 # https://github.com/kubernetes/kubernetes/issues/44460

**Special notes for your reviewer**:
/assign @jsafrane @msau42 

**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>.

Enable protection tests

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

- StorageObjectInUseProtection feature is enabled by default so the test can run in regular e2e test suite
- Rename PVC protection test, it tests only PVCs and not whole storage.


**Release note**:

```release-note
NONE
```