This PR adds the pod-level metrics for CPU and memory stats. cAdvisor
can get all pod cgroup information so we can add this pod-level CPU and
memory stats information from the corresponding pod cgroup

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allow ELB Healthcheck configuration via Service annotations

**What this PR does / why we need it**:
The default settings which are set on the ELB HC work well but there are cases when it would be better to tweak its parameters -- for example, faster detection of unhealthy backends. This PR makes it possible to override any of the healthcheck's parameters via annotations on the Service, with the exception of the Target setting which continues to be inferred from the Service's spec.

**Release note**:
```release-note
It is now possible to override the healthcheck parameters for AWS ELBs via annotations on the corresponding service. The new annotations are `healthy-threshold`, `unhealthy-threshold`, `timeout`, `interval` (all prefixed with `service.beta.kubernetes.io/aws-load-balancer-healthcheck-`)
```

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Bump Heapster version to v1.5.0-beta.2

**What this PR does / why we need it**:
Bump Heapster version to v1.5.0-beta.2

**Release note**:

```release-note
NONE
```

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require webhook admission kubeconfigfile to be absolute

Minimal change to enforce absolute file paths when using webhook admission config.

Eventually we should resolve the local file paths relative to the original configuration file, but that requires fairly significant plumbing.

@caesarxuchao @sttts @liggitt 

If this is not fixed, then inconsistent, seemingly random file resolution will happen and may pin this API to bad behavior that we will later have to break.

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Adding etcd version for kubeadm upgrade plan

Adding etcd version display to kubeadm upgrade plan subcommand
```release-note
Adding etcd version display to kubeadm upgrade plan subcommand
```
Closes https://github.com/kubernetes/kubeadm/issues/531

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kubectl: Add Terminating state to PVCs

kubectl should show something when a PVC has a deletion timestamp and is waiting for deletion. This patch follows Pod - it adds Terminating state.

For easier discovery of errors, finalizers are printed in `kubectl describe pvc`.

This is part of [PVC finalizer feature for 1.9](https://github.com/kubernetes/community/blob/master/contributors/design-proposals/storage/postpone-pvc-deletion-if-used-in-a-pod.md) where we will keep PVC waiting for deletion for a longer time than before so users should know what is going on.

/sig cli

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

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Fix setting resources in fluentd-gcp plugin

Currently if some of the variables are not set, scripts prints error, which is not critical, since the function is executed in a separate process, but it leads to the wrong resulting values

```release-note
NONE
```

/cc @piosz @x13n 
/assign @roberthbailey @mikedanese 
Could you please approve?

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Fix long event handler in cloud cidr allocator

Ref #52292

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Update of elasticsearch kibana version

**What this PR does / why we need it**:
Updated elasticsearch and kibana version to version 5.6.4
This was motivated by @crassirostris in https://github.com/kubernetes/kubernetes/pull/54215#issuecomment-343003874

**Release note**:
```release-note
[fluentd-elasticsearch addon] Elasticsearch and Kibana are updated to version 5.6.4
```

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Regenerate API server serving certificates when upgrading.

**What this PR does / why we need it**:
TODO: 
- [x] check the age of crt.
- [x] check the new version number.

**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/kubeadm/issues/548

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

**Release note**:

```release-note
NONE
```

Signed-off-by: Mik Vyatskov <vmik@google.com>

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Do not add new field in fluentd CRI log format.

After https://github.com/kubernetes/kubernetes/pull/55922 is merged, the test `Cluster level logging implemented by Stackdriver should ingest logs` starts to fail in cri-containerd cluster e2e test.
https://k8s-testgrid.appspot.com/sig-node-containerd#e2e-gci

I believe the reason is that the GCP fluentd plugin assumes that there are only `timestamp`, `severity`, `stream` and `log|message|msg` fields in the log entry.

If there is any other fields, GCP fluentd plugin will not try to convert the payload to json, even if the log content is json. The plugin deletes `stream`, `timestamp` and `severity`, then assumes that there is only one field left https://github.com/GoogleCloudPlatform/fluent-plugin-google-cloud/blob/e13c89a1b6e0c33bac35435fe8e41d566ce52687/lib/fluent/plugin/out_google_cloud.rb#L495.

This PR removes the tag field. With this, fluentd GCP plugin should work again.

@yujuhong @crassirostris 
/cc @kubernetes/sig-node-bugs @kubernetes/sig-instrumentation-bugs 
/cc @derekwaynecarr for milestone approve. Thanks!

**Release note**:

```release-note
none
```

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Use GetVersion() API instead of ver command

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

Should use GetVersion vs Shelling out to ver.

**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 #55083

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```

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install ipset in debian-iptables docker image

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

IPVS kube-proxy use ipset doing SNAT and packets filtering. Because IPVS kube-proxy is based on debian-iptables docker image, this PR installs ipset util in the image.

I believe I lost this change in #54219 somehow during code rebase.

**Which issue(s) this PR fixes**:
Fixes #56116

**Special notes for your reviewer**:

**Release note**:

```release-note
install ipset in debian-iptables docker image
```

/sig network

/kind bug

/area kube-proxy

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Revert "Kubelet flags take precedence over config from files/ConfigMaps"

This reverts commit cbebb614.

Per https://github.com/kubernetes/kubernetes/pull/56097#issuecomment-346243014

```release-note
NONE
```

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Add cleanup-ipvs flag for kube-proxy 

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

There is no way to tell if a given ipvs rule is created by ipvs proxier or not, and some people have complained that iptables/userspace proxier will clean up their ipvs rules when start up - both iptables and userspace proxiers need to clean up legacy proxy rules created by ipvs proxier.

This PR adds a new `--cleanup-ipvs` flag for kube-proxy for the sake of providing users a way to decide if clean up IPVS rules or not when start iptables or userspace proxier.

**Which issue(s) this PR fixes**:
Fixes #55857 

**Special notes for your reviewer**:

**Release note**:

```release-note
Add cleanup-ipvs flag for kube-proxy 
```

/sig network
/area ipvs
/king bug

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Removed opaque integer resources (deprecated in v1.8)

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

* Remove opaque integer resources (OIR) support from the code base. This feature was deprecated in v1.8 and replaced by Extended Resources (ER).

**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 #55102

**Release note**:

```release-note
Remove opaque integer resources (OIR) support (deprecated in v1.8.)
```

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Implement volume resize for cinder

**What this PR does / why we need it**:
resize for cinder
xref: [resize proposal](https://github.com/kubernetes/community/pull/657)

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: xref https://github.com/kubernetes/community/pull/657
Follow up: #49727

**Special notes for your reviewer**:

**Release note**:
```release-note
Implement volume resize for cinder
```

wip, assign to myself first

/assign @NickrenREN

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Block volumes Support: FC plugin update

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

Add interface changes to FC volume plugin to enable block volumes support feature.

**Which issue this PR fixes**: 
Based on this proposal (kubernetes/community#805 & kubernetes/community#1265) and this feature issue: kubernetes/features#351

**Special notes for your reviewer**:

This PR temporarily includes following changes except FC plugin change for reviewing purpose.
These changes will be removed from the PR once they are merged.
- (#50457) API Change 
- (#53385) VolumeMode PV-PVC Binding change
- (#51494) Container runtime interface change, volumemanager changes, operationexecutor changes

There are another PRs related to this functionality.
(#50457) API Change
(#53385) VolumeMode PV-PVC Binding change
(#51494) Container runtime interface change, volumemanager changes, operationexecutor changes
(#55112) Block volume: Command line printer update
Plugins
(#51493) Block volumes Support: FC plugin update
(#54752) Block volumes Support: iSCSI plugin update

**Release note**:

```
FC plugin: Support for block volume 
- This enables uses to allow attaching raw block volume to their pod without filesystem through FC plugin.
```

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fix  #53735, check whether  interface conversion is ok

**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 #

fix #53735

avoid interface conversion error 

**Special notes for your reviewer**:

**Release note**:

```release-note
```

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Kubernetes CSI - in-tree Plugin Implementation

**What this PR does / why we need it**:
This PR is part of the internal Kubernetes CSI Volume plugin.  It implements the Attach/Detach/Mount/Unmount API.

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: https://github.com/kubernetes/features/issues/178

**Special notes for your reviewer**:
- Implements feature https://github.com/kubernetes/features/issues/178
- Designed https://github.com/kubernetes/community/pull/1258

Other CSI Volume plugin PRs
- CSI Persistent Volume Source - https://github.com/kubernetes/kubernetes/pull/55204

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

This reverts commit cbebb614.

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oidc auth: fix prefix flag plumbing

Fixes https://github.com/kubernetes/kubernetes/issues/56169

Tested this with an full API server against Google. It works now.

:(

cc @kubernetes/sig-auth-bugs 

```release-note
kube-apiserver: fixed --oidc-username-prefix and --oidc-group-prefix flags which previously weren't correctly enabled
```

/assign @liggitt @deads2k 

Probably worth a cherry pick.

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Implement individual control for kubeadm preflight checks

**What this PR does / why we need it**:
With new flag `--ignore-checks-errors` user is able to
decrease severity of each individual check error to warning.

Old flag `--skip-preflight-checks` now acts as `--ignore-checks-errors=all` and will produce warnings.

**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#480

**Special notes for your reviewer**:
/area kubeadm 
/sig cluster-lifecycle

cc @luxas 

**Release note**:
```release-note
New kubeadm flag `--ignore-checks-errors` that enables to decrease severity of each individual error to warning.
Old flag `--skip-preflight-checks` is marked as deprecated and acts as `--ignore-checks-errors=all`
```

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Kubelet flags take precedence over config from files/ConfigMaps

Changes the Kubelet configuration flag precedence order so that flags
take precedence over config from files/ConfigMaps.

See:
https://docs.google.com/document/d/18-MsChpTkrMGCSqAQN9QGgWuuFoK90SznBbwVkfZryo/

Also modifies e2e node test suite to transform all relevant Kubelet flags into
a config file before starting tests when the KubeletConfigFile feature gate is
true, and turns on the KubeletConfigFile gate for all e2e node tests.
This allows the alpha dynamic Kubelet config feature to continue to 
work in tests after the precedence change.

fixes #56171

Related: https://github.com/kubernetes/features/issues/281


```release-note
CLI flags passed to the Kubelet now take precedence over Kubelet config files and dynamic Kubelet config. This helps ensure backwards compatible behavior across Kubelet binary updates.
```

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Block volumes Support: CRI, volumemanager and operationexecutor changes

**What this PR does / why we need it**:
This PR contains following items to enable block volumes support feature.
- container runtime interface change
- volumemanager changes
- operationexecuto changes


**Which issue this PR fixes**:
Based on this proposal (kubernetes/community#805) and this feature issue: kubernetes/features#351

**Special notes for your reviewer**:

There are another PRs related to this functionality.
(#50457) API Change
(#53385) VolumeMode PV-PVC Binding change
(#51494) Container runtime interface change, volumemanager changes, operationexecutor changes
(#55112) Block volume: Command line printer update
Plugins
(#51493) Block volumes Support: FC plugin update
(#54752) Block volumes Support: iSCSI plugin update

**Release note**:
```
Adds alpha support for block volume, which allows the users to attach raw block volume to their pod without filesystem on top of the volume.
```
/cc @msau42 @liggitt @jsafrane @saad-ali @erinboyd @screeley44

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Enable cpu manager only if the node e2e test is not skipped.

**What this PR does / why we need it**: This PR enables cpu manager in Kubelet only if the node e2e tests are not skipped. This change fixes the failures seen in https://k8s-testgrid.appspot.com/sig-node-kubelet#kubelet-serial-gce-e2e. 

Fixes #56144

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Update the configmap manifest in CoreDNS

**What this PR does / why we need it**:
This PR updates the corefile to retain the pod requests support like in kube-dns. This helps when upgrading CoreDNS using kubeadm upgrade (#55952).

**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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fixing issue of feature gate not being turned off properly

Fixes #56166 

Adding proper defer and toggle of feature gate for BlockVolume support

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Sts per Pod Name Label

**What this PR does / why we need it**:
StatefulSet controller will add a label for each Pod in the StatefulSet. The label is of the form 
`statefulset.kubernetes.io/pod-name: <pod.Name>`. This allows a unique service to be created for each Pod in the StatefulSet.

Fixes  #44103, #28660


```release-note
StatefulSet controller will create a label for each Pod in a StatefulSet. The label is named statefulset.kubernetes.io/pod-name and it is equal to the name of the Pod. This allows users to create a Service per Pod to expose a connection to individual Pods.
```

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Adds device plugin allocation latency metric.

For #53497


**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

```