We let dockershim implement the kubelet's internal (CRI) API as an
intermediary step before transitioning fully to communicate using gRPC.
Now that kubelet has been communicating to the runtime over gRPC for
multiple releases, we can safely retire the extra interface in
dockershim.

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kubeadm: Allows to specify custom flag values for control plane components

This makes it possible to override / add flag values to the k8s api server, controller manager and scheduler components on `kubeadm init` and `kubeadm alpha controlplane <component>`

**What this PR does / why we need it**:
This PR makes kubeadm a little more flexible by allowing to specify flag values (or override kubeadm defaults) for the control plane components.
One good example is to deploy Kubernetes with a different admission-control flag on API 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 #58072

**Special notes for your reviewer**:
Not sure about what should be fixed. The PR merely adds flags to the CLI exposing existing functionality (which I suppose is already tested)

**Release note**:
```release-note
kubeadm now accept `--apiserver-extra-args`, `--controller-manager-extra-args` and `--scheduler-extra-args` to override / specify additional flags for control plane components
```

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improve error message for expired tokens

**What this PR does / why we need it**:
When you join a node with a expired tokens, you can get fuzz error messages: `[discovery] Failed to connect to API Server "<cluster-ip>:6443": there is no JWS signed token in the cluster-info ConfigMap. This token id "c33826" is invalid for this cluster, can't connect`, we should improve 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/kubeadm/issues/630](https://github.com/kubernetes/kubeadm/issues/630)

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```

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csi: Fix versioning error message

**What this PR does / why we need it**:
Incorrect error message

**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 #58092

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Fix event message when processing loadbalancer update

**What this PR does / why we need it**:
When a service get updated, in func [processServiceUpdate](https://github.com/kubernetes/kubernetes/blob/master/pkg/controller/service/service_controller.go#L249), we process its LB accordingly, that is, create one if the service requests and no corresponding loadbalancer exists; and delete potential  orphaned load balancer if the service does not need it any more.
But if a service does not `wantsLoadBalancer` but get error when trying to `GetLoadBalancer`, user could find an event in format of "CreatingLoadBalancerFailed..."[here](https://github.com/kubernetes/kubernetes/blob/master/pkg/controller/service/service_controller.go#L261), which would confusing users. So we should generate event info according to service type.

**Special notes for your reviewer**:
/sig network

**Release note**:

```release-note
NONE
```

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 make kube-apiserver admission flag disable other plugins 98eb5922

The old kube-apiserver flag for enabling admission plugins implicitly disabled ones that were unmentioned.  This restores that behavior.

followup to https://github.com/kubernetes/kubernetes/pull/58123

@hzxuzhonghu You're pretty deep into this now.  ptal

/assign hzxuzhonghu
/assign sttts

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GCE: firewall

GCE: firewalls to use generated code

```release-note
NONE
```

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Add apiserver metric for number of requests dropped by 'max-inflight-requests' filters.

Useful for figuring out on which dimension master is overloaded.

cc @sttts @lavalamp @deads2k @timothysc @hulkholden

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handle scheduler without exposed ports

Plumbs the scheduler port opt out more completely.  When the metrics server was added, the deprecated paths forgot about it.

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upgrade sample-controller deployment to apps/v1

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

apps/v1 is GA


**Release note**:

```release-note
NONE
```
/assign @sttts @nikhita

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refactor admission flag

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

Refactor admission control flag, finally make cluster admins not care about orders in this flag.

**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
Add `--enable-admission-plugin` `--disable-admission-plugin` flags and deprecate `--admission-control`.
Afterwards, don't care about the orders specified in the flags.
```

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Better check for GCE VM

**What this PR does / why we need it**:
we should do what is being done in GoogleCloudPlatform/google-cloud-go:
https://github.com/GoogleCloudPlatform/google-cloud-go/blob/master/compute/metadata/metadata.go#L259-L267

Looks like folks are reusing appliances which end up with
```
$ cat /sys/class/dmi/id/product_name
Google Search Appliance
```
**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 #57760

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```

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Add liggitt to hack approvers

* Authored ~60 commits involving this folder
* Already an approver on things with components in hack (CLI tests, apiserver changes requiring local-up-cluster changes, fixtures and testdata, etc)

```release-note
NONE
```

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Fix UpdatePodWithRetries godoc documentation

```release-note
NONE
```

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Update TargetPool to use generated code

```release-note
NONE
```

This makes it possible to override / add flag values to the k8s api server, controller manager and scheduler components on `kubeadm init` and `kubeadm alpha controlplane <component>`
Signed-off-by: Simon Ferquel <simon.ferquel@docker.com>

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typo of errUnsuportedVersion

**What this PR does / why we need it**:
typo of errUnsuportedVersion in pkg/kubelet/cm/deviceplugin/types.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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Update Zones to use generated code

Update Zones to use generated code
```release-note
NONE
```

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Fixed spelling of Promethus to Prometheus

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

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Remove ExternalTrafficLocalOnly from kube_feature gate

*What this PR does / why we need it**:
This PR is for v1.10.

External Source IP Preservation (ESIPP) had been promoted to GA since 1.7. Following the proposal on https://github.com/kubernetes/kubernetes/issues/46404#issuecomment-303939180, we should be able to remove it from feature gate now.

Added release note to announce this.

Also ref the previous attempt: https://github.com/kubernetes/kubernetes/pull/45857.

**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 #56645

**Special notes for your reviewer**:

**Release note**:

```release-note
"ExternalTrafficLocalOnly" has been removed from feature gate. It has been a GA feature since v1.7.
```

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GCE: Change routes to use the generated code

GCE: Change routes to use the generated code

```release-note
NONE
```

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Updates UrlMap, BackendService, Healthcheck, Certs, InstanceGroup to use the generated code

Updates UrlMap, BackendService, Healthcheck, Certs, InstanceGroup to use the generated code

```release-note
NONE
```

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Kubeadm: clean up MarshalToYamlForCodecs

Proxy will use PrintBytesWithLinePrefix to indent.


**What this PR does / why we need it**:
This removed the function MarshalToYamlForCodecsWithShift() and the proxy
code will use PrintBytesWithLinePrefix() to shift over the yaml lines.

**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 #57907

**Special notes for your reviewer**:

**Release note**:

```release-note-none
```

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CHANGELOG: feature flag is "AdvancedAuditing" not "AdvancedAudit"

https://github.com/kubernetes/kubernetes/blob/v1.9.2/staging/src/k8s.io/apiserver/pkg/features/kube_features.go#L44

cc @liggitt @sttts 

```release-note
NONE
```

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GCE: forwarding rules to use generated code

GCE: forwarding rules to use generated code

```release-note
NONE
```

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GCE: addresses to use generated code

GCE: addresses to use generated code

```release-note
NONE
```

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Optionally prevent metadata concealment firewall from being set

**What this PR does / why we need it**: GCP: allow a master to not include a metadata concealment firewall rule (if it's not running the metadata proxy).

**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
GCP: allow a master to not include a metadata concealment firewall rule (if it's not running the metadata proxy).
```

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Add get volumeattachment to the node authorizer

Fixes #58355

Adds `get volumeattachment` authorization for nodes to the node authorizer when the CSI feature is enabled

```release-note
NONE
```