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remove duplicate healthz check register

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

We registe healthz check twice, another is 

https://github.com/kubernetes/kubernetes/blob/master/cmd/kube-controller-manager/app/controllermanager.go#L203

we should remove the duplicate one

**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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Add scale down to 1 e2e test.

This PR adds test checking scale to 1 functionality.

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make easy validation admission plugins into validators

This switches "easy" admission plugins that need to be validators to be validators.  I also did one simple plugin to do both mutation and validation for practice.

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

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Node autoprovisioning e2e test.

This PR adds test scenario for cluster-autoscaler in GKE  for node autoprovisioning.

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Remove dependency on drv_cfg binary for querying ScaleIO devices

**What this PR does / why we need it**:
This PR fixes the issue where a ScleIO kubernetes plugin required additional binary `drv_cfg` to be present on the local node to work properly, making it harder for the kubelet binary to be containerized without providing access to local paths inside the container.

**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 #54954 

**Special notes for your reviewer**:

**Release note**:

```release-note
ScaleIO driver completely removes dependency on drv_cfg binary so a Kubernetes cluster can easily run a containerized kubelet.
```

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Improve unit test coverage for kube-proxy configuration.

**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**:
/cc @ncdc 

**Release note**:

```release-note
NONE
```

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Improve unit test coverage for network policy validation.

**What this PR does / why we need it**:
`ok  	k8s.io/kubernetes/pkg/apis/networking/validation	0.074s	coverage: 87.8% of statements`

to 

`ok  	k8s.io/kubernetes/pkg/apis/networking/validation	0.082s	coverage: 100.0% of statements`

**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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Only parse ClusterCIDR, ServiceCIDR if AllocateNodeCIDRs

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

Avoid unnecessary spam in kube-controller-manager log if --cluster-cidr is not specified and --allocate-node-cidrs is false. Add clarification in kube-controller-manager help about that.

**Release note**
```release-note
Avoid unnecessary spam in kube-controller-manager log if --cluster-cidr is not specified and --allocate-node-cidrs is false.
```

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Fix kube-proxy fall back to iptables firstly when unable to load kernel modules

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

Fix kube-proxy fall back to iptables firstly when unable to load kernel modules

**Which issue this PR fixes**: 

fixes #54121

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```

/kind bug
/sig network
/area kube-proxy

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Update storageclass version to v1 in examples

**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**:
/cc @jsafrane 

**Release note**:

```release-note
NONE
```

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clean up legacy ipv4/32 in ipvs proxy

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

clean up legacy ipv4/32 in ipvs proxy

**Which issue(s) this PR fixes**: closes #51866

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```
/sig network

/area ipv6

/assign @thockin 

cc @danehans

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Add kubeadm way in ipvs proxy README

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

As #53962 which support specify proxy mode for kubeadm is already in, we should add ipvs proxy kubeadm way in README.md.

**Which issue(s) this PR fixes**:
Fixes #54978

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```

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StopPodSandbox should not log when container is already removed

**What this PR does / why we need it**:
StopPodSandbox should not log when a container is already gone.  It should only log if it could not stop and the container was still present.

Fixes https://github.com/kubernetes/kubernetes/issues/55021

**Special notes for your reviewer**:
This was seen in our production logs, need to eliminate spam.

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

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Reduce metadata-proxy cpu requests to 30m

After the recent change enabling metadata-proxy in tests (https://github.com/kubernetes/kubernetes/pull/54150) we started seeing problems with scheduling cluster autoscaler on master. Metadata-proxy eats all of the available space leaving nothing for CA to run on. 

This PR reduces the cpu requests for metadata-proxy allowing other components to fit in.

cc: @kubernetes/sig-autoscaling-bugs

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Add support to for alternative container runtime in `kube-up.sh`

For https://github.com/kubernetes/features/issues/286.

This PR added 4 new environment variables in `kube-up.sh` to support alternative container runtime:
1) `KUBE_MASTER_EXTRA_METADATA` and `KUBE_NODE_EXTRA_METADATA`. Add extra metadata on master and node instance. With this we could specify different cloud-init for a different container runtime, and also add extra metadata for the new cloud-init, e.g. [master.yaml](https://github.com/Random-Liu/cri-containerd/blob/7d739662141cc137f8b1e82a9824b18be2e5df21/test/e2e/master.yaml)
2) `KUBE_CONTAINER_RUNTIME_ENDPOINT`. Specify different sock for different container runtime. It's only used when it's not empty.
3) `KUBE_LOAD_IMAGE_COMMAND`. Specify different load image command for different container runtime.

An example for cri-containerd:
```
export KUBE_MASTER_EXTRA_METADATA="user-data=${GOPATH}/src/github.com/kubernetes-incubator/cri-containerd/test/e2e/master.yaml,cri-containerd-configure-sh=${GOPATH}/src/github.com/kubernetes-incubator/cri-containerd/test/configure.sh"
export KUBE_NODE_EXTRA_METADATA="user-data=${GOPATH}/src/github.com/kubernetes-incubator/cri-containerd/test/e2e/node.yaml,cri-containerd-configure-sh=${GOPATH}/src/github.com/kubernetes-incubator/cri-containerd/test/configure.sh"
export KUBE_CONTAINER_RUNTIME="remote"
export KUBE_CONTAINER_RUNTIME_ENDPOINT="/var/run/cri-containerd.sock"
export KUBE_LOAD_IMAGE_COMMAND="/home/cri-containerd/usr/local/bin/cri-containerd load"
export NETWORK_POLICY_PROVIDER="calico"
```
Signed-off-by: Lantao Liu <lantaol@google.com>

```release-note
none
```
/cc @yujuhong @dchen1107 @feiskyer @mikebrow @abhi @mrunalp @runcom 
/cc @kubernetes/sig-node-pr-reviews

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Fix calico network policy for opensource.

For https://github.com/kubernetes/features/issues/286

This PR:
1) Add `NON_MASTER_NODE_LABELS` env, and only apply calico node label on non-master nodes.
2) Set ip masq rules in cloud init, so that we don't need the ip masq agent. @dchen1107 @dnardo As we discussed.
3) Let master use `${NETWORK_PROVIDER}` instead of fixed cni, because we won't run calico node agent on master. The master network should be configured separately (kubenet by default).

With this PR, I could bring up a cluster with `NETWORK_POLICY_PROVIDER=calico` on GCE now.
```console
$ cluster/kubectl.sh get pods --all-namespaces
NAMESPACE     NAME                                                  READY     STATUS    RESTARTS   AGE
kube-system   calico-node-9bxbv                                     2/2       Running   0          13m
kube-system   calico-node-kjxtw                                     2/2       Running   0          13m
kube-system   calico-node-vertical-autoscaler-67fb4f45bd-hcjmw      1/1       Running   0          16m
kube-system   calico-node-xs2s2                                     2/2       Running   0          13m
kube-system   calico-typha-7c4d876ddf-d4dtx                         1/1       Running   0          15m
kube-system   calico-typha-horizontal-autoscaler-5f477cdc66-qwwph   1/1       Running   0          16m
kube-system   calico-typha-vertical-autoscaler-58f7d686f7-pn72s     1/1       Running   0          16m
kube-system   etcd-empty-dir-cleanup-e2e-test-lantaol-master        1/1       Running   0          16m
kube-system   etcd-server-e2e-test-lantaol-master                   1/1       Running   0          16m
kube-system   etcd-server-events-e2e-test-lantaol-master            1/1       Running   0          16m
kube-system   event-exporter-v0.1.7-9d4dbb69c-m76v5                 2/2       Running   0          16m
kube-system   fluentd-gcp-v2.0.10-25dmf                             2/2       Running   0          16m
kube-system   fluentd-gcp-v2.0.10-kgxsk                             2/2       Running   0          16m
kube-system   fluentd-gcp-v2.0.10-p75xg                             2/2       Running   0          16m
kube-system   fluentd-gcp-v2.0.10-xzh77                             2/2       Running   0          16m
kube-system   heapster-v1.5.0-beta.0-5cf4d9dff7-dmvm7               4/4       Running   0          13m
kube-system   kube-addon-manager-e2e-test-lantaol-master            1/1       Running   0          15m
kube-system   kube-apiserver-e2e-test-lantaol-master                1/1       Running   0          16m
kube-system   kube-controller-manager-e2e-test-lantaol-master       1/1       Running   0          16m
kube-system   kube-dns-79bdcb6c9f-2bpc8                             3/3       Running   0          15m
kube-system   kube-dns-79bdcb6c9f-gr686                             3/3       Running   0          16m
kube-system   kube-dns-autoscaler-996dcfc9d-pfs4s                   1/1       Running   0          16m
kube-system   kube-proxy-e2e-test-lantaol-minion-group-3khw         1/1       Running   0          16m
kube-system   kube-proxy-e2e-test-lantaol-minion-group-6878         1/1       Running   0          16m
kube-system   kube-proxy-e2e-test-lantaol-minion-group-j9rq         1/1       Running   0          16m
kube-system   kube-scheduler-e2e-test-lantaol-master                1/1       Running   0          16m
kube-system   kubernetes-dashboard-765c6f47bd-lsw5r                 1/1       Running   0          16m
kube-system   l7-default-backend-6d477bf555-x54zf                   1/1       Running   0          16m
kube-system   l7-lb-controller-v0.9.7-e2e-test-lantaol-master       1/1       Running   0          16m
kube-system   metrics-server-v0.2.0-9c4f8c48d-gkl79                 2/2       Running   0          13m
kube-system   monitoring-influxdb-grafana-v4-54df94856c-krkvb       2/2       Running   0          16m
kube-system   rescheduler-v0.3.1-e2e-test-lantaol-master            1/1       Running   0          16m
```

**Note that with this PR, master node will be using kubenet by default. And network policy will not apply on master node.**

**We need this to unblock `cri-containerd` integration with `kube-up.sh`.**
/cc @dchen1107 @dnardo Please take a look.
@kubernetes/sig-network-misc @kubernetes/sig-cluster-lifecycle-misc 
Signed-off-by: Lantao Liu <lantaol@google.com>

```release-note
None
```

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Add admission handler for device resources allocation

**What this PR does / why we need it**:
Add admission handler for device resources allocation to fail fast during pod creation

**Which issue this PR fixes** 
fixes #51592

**Special notes for your reviewer**:
@jiayingz Sorry, there is something wrong with my branch in #51895. And I think the existing comments in the PR might be too long for others to view. So I closed it and opened the new one, as we have basically reach an agreement on the implement :)
I have covered the functionality and unit test part here, and would set about the e2e part ASAP

/cc @jiayingz @vishh @RenaudWasTaken 

**Release note**:

```release-note
NONE
```

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discovery client not depend on pkg/api/legacyscheme

Switch kubectl's cached discovery client to use kubect's scheme (pkg/kubectl/scheme) which only registered with external version types.

The encoding and decoding here uses only `k8s.io/apimachinery/pkg/apis/meta/v1.APIGroupList` and `k8s.io/apimachinery/pkg/apis/meta/v1.APIResourceList` which are not internal version. So it should be safe.

```release-note
NONE
```

/assign @monopole

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If command.Execute() return err, print to stdErr

The current kube-proxy not print error if (execute() failed) . not so good and not so friendly to user.
If print err to stdError, will show us why it failed.

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Cleanup resouce test

- Make client-go testing support decoding to external version
- Cleanup bad dependency of `pkg/kubectl/resource` pkg

```release-note
NONE
```

/assign @monopole @caesarxuchao

Signed-off-by: Lantao Liu <lantaol@google.com>

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Add a file store utility package in kubelet

More and more components checkpoints (i.e., persist their states) in
kubelet. Refurbish and move the implementation in dockershim to a
utility package to improve code reusability.

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Lift embedded structure out of ManifestURLHeader field

Related: #53833

```release-note
It is now possible to set multiple manifest url headers via the Kubelet's --manifest-url-header flag. Multiple headers for the same key will be added in the order provided. The ManifestURLHeader field in KubeletConfiguration object (kubeletconfig/v1alpha1) is now a map[string][]string, which facilitates writing JSON and YAML files.
```

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Support retainkeys strategy for new merge code

- Some prefactoring for retainkeys
- Add retainkeys strategy


```release-note
NONE
```

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should check and return err when visit failure

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

should check and return err when visit failure

**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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cmd: genutils: remove entry from .golint_failures

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

`golint` emits warnings

```
exported function OutDir should have comment or be unexported
strings should not be capitalized or end with punctuation or a newline
```

- Add documentation comment to exported function OutDir.
- Remove newline from error string.
- Remove `hack\.golint_failures` entry for `cmd/genutils`

**Special notes for your reviewer**:
   
Don't know which sig to use?

**Release note**:

```release-note
NONE
```

/kind cleanup

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Basic GCE PodSecurityPolicy Config

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

This PR lays the foundation for enabling PodSecurityPolicy in GCE and other default deployments. The 3 commits are:

1. Add policies, roles & bindings for the default addons on GCE.
2. Enable the PSP admission controller & load the addon policies when the`ENABLE_POD_SECURITY_POLICY=true` environment variable is set.
3. Support the PodSecurityPolicy in the E2E environment & add PSP tests.

NOTES:

- ~~Depends on https://github.com/kubernetes/kubernetes/pull/52301 for privileged capabilities~~
- ~~Depends on https://github.com/kubernetes/kubernetes/pull/52849 for sane mutations~~
- ~~Depends on https://github.com/kubernetes/kubernetes/pull/53479 for aggregator tests to pass~~
- ~~Depends on https://github.com/kubernetes/kubernetes/pull/54175 for dedicated fluentd service~~ account
- This PR is a fork of https://github.com/kubernetes/kubernetes/pull/46064, credit to @Q-Lee

**Which issue this PR fixes**: #43538

**Release note**:
```release-note
Add support for PodSecurityPolicy on GCE: `ENABLE_POD_SECURITY_POLICY=true` enables the admission controller, and installs policies for default addons.
```

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Update kube-openapi to use validation

**What this PR does / why we need it**: Moves openapi validation code to kube-openapi, so that we can move the rest of the code to apimachinery repository, so that later we can use it from both the client and the server.

**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 #Nothing

**Special notes for your reviewer**:

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

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Explicitly set route_localnet on nodes & masters.

Allow for loopback addresses to be used for routing, specifically to
enable metadata proxy on master nodes.



**What this PR does / why we need it**: Enables metadata proxy (#8867) to work on the master.  This is already being done on the nodes by kube-proxy, but this makes it explicit, and sets it on the master where kube-proxy doesn't run.  Thanks to @dnardo for figuring this out!

**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 #54736
Fixes #

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```

ClusterCIDR and ServiceCIDR are settings that are only used if at least
AllocateNodeCIDRs is set. The route controller requires in addition to
it for ConfigureCloudRoutes to be true as well. Since
AllocateNodeCIDRs is by default false, if guard the parsing of these
settings in order to not unnecessarily spam logs. Amend the
documentation of kube-controller-manager for the 2 settings to point
out the requirement of AllocateNodeCIDRs to be true as well