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Using a fixed set of locks, then we don't need to free unused locks anymore.

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

Using a fixed set of locks, then we don't need to free unused locks anymore.
See kubernetes/kubernetes/pull/66442 for discussions.

**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 #65113

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```

/assign @msau42 
/assign @thockin

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Make error messages more helpful in some e2e tests

Related to issues 34059 and 10322



**What this PR does / why we need it**:
This PR makes error messages more helpful in some e2e 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 #

**Special notes for your reviewer**:
This is my first time writing Go/Contributing to Kubernetes - let me know if I've missed anything! :-)

**Release note**:

```release-note
NONE
```

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Add verify script for staging repo metadata files

helps ensure we don't miss required files as new staging repos are added

```release-note
NONE
```

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Fix HPA sample sanitization

**What this PR does / why we need it**: @mwielgus pointed out a case when HPA fails as a result of my changes to HPA algorithm:
- Have pods that use a lot of CPU during initilization, become ready right after they initialize,
- Trigger a scale up,
- When new pods become ready will will count their usage (even though it's not related to any work that needs doing),
- This triggers another scale up, even though existing pods can handle work, no problem.

The fix is:
- Use all samples for non-cpu metrics.
- Only use CPU samples if:
  - Pod is ready and was started more than 2 minutes ago, or
  - Pod is unready and last readiness change happened more than 10s after it was started.

Reasoning behind this in: https://docs.google.com/document/d/1UdtYedhmCxjaJIQi6hwJMY0eHQQKxlVD8lSHZC1BPOA/edit

**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
Replace scale up forbidden window with disregarding CPU samples collected when pod was initializing.
```

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Moving KubeSchedulerConfiguration from ComponentConfig API types to staging repos

**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 kubernetes/kubeadm#528

**Special notes for your reviewer**:
/cc luxas timothysc 
/cc @kubernetes/sig-cluster-lifecycle-pr-reviews 
**Release note**:

```release-note
Moving KubeSchedulerConfiguration from ComponentConfig API types to staging repos
```

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api: change owners from apimachinery to architecture

Ref: https://github.com/kubernetes/kubernetes/pull/67672#issuecomment-415566887
Change in the sigs files in k/community: https://github.com/kubernetes/community/pull/2584

/sig api-machinery
/sig architecture

/cc dims
/assign lavalamp 

**Release note**:

```release-note
NONE
```

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delegated authz: add AlwaysAllowPaths to option struct (defaulting to /healthz)

Add `AlwaysAllowPaths` field to delegated authz. These http paths are excluded from the authz chain.

Prerequisite for https://github.com/kubernetes/kubernetes/pull/64149 and https://github.com/kubernetes/kubernetes/pull/67069.

```release-note
Added --authorization-always-allow-paths to components doing delegated authorization to exclude certain HTTP paths like /healthz from authorization.
```

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apiextensions: remove area/custom-resources label from OWNERS

Sometimes changes in apiextensions-apiserver are not really related to custom resources but just general api-machinery (or worse godep updates). Adding the label `area/custom-resources` to such PRs makes triaging using the label hard.

Adding the label manually is much cleaner.

See https://github.com/kubernetes/kubernetes/pull/67753 for an example.

/assign sttts 


**Release note**:

```release-note
NONE
```

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Revert "Parallelize RC deletion in density test"

Reverts kubernetes/kubernetes#67712

2k test has failed because of this: even if we trigger removal in parallel, controller manager is deleting replicacontrollers sequentially:
```
I0823 13:35:41.906] Aug 23 13:35:41.906: INFO: Terminating { ReplicationController} density43650-0-584f5bb0-a6d6-11e8-b145-0a580a3c6f08 pods took: 1m0.00118401s
I0823 13:36:42.021] Aug 23 13:36:42.020: INFO: Terminating { ReplicationController} density43650-14-584f5bb0-a6d6-11e8-b145-0a580a3c6f08 pods took: 2m0.00202238s
I0823 13:37:42.056] Aug 23 13:37:42.055: INFO: Terminating { ReplicationController} density43650-8-584f5bb0-a6d6-11e8-b145-0a580a3c6f08 pods took: 3m0.004624139s
I0823 13:38:42.092] Aug 23 13:38:42.092: INFO: Terminating { ReplicationController} density43650-5-584f5bb0-a6d6-11e8-b145-0a580a3c6f08 pods took: 4m0.000797258s
I0823 13:39:32.095] Aug 23 13:39:32.095: INFO: Terminating { ReplicationController} density43650-4-584f5bb0-a6d6-11e8-b145-0a580a3c6f08 pods took: 4m50.000689353s
I0823 13:40:32.206] Aug 23 13:40:32.206: INFO: Terminating { ReplicationController} density43650-11-584f5bb0-a6d6-11e8-b145-0a580a3c6f08 pods took: 5m50.000731007s
I0823 13:41:32.206] Aug 23 13:41:32.206: INFO: Terminating { ReplicationController} density43650-7-584f5bb0-a6d6-11e8-b145-0a580a3c6f08 pods took: 6m50.000648956s
I0823 13:42:32.194] Aug 23 13:42:32.194: INFO: Terminating { ReplicationController} density43650-12-584f5bb0-a6d6-11e8-b145-0a580a3c6f08 pods took: 7m50.001155426s
I0823 13:43:32.282] Aug 23 13:43:32.282: INFO: Terminating { ReplicationController} density43650-10-584f5bb0-a6d6-11e8-b145-0a580a3c6f08 pods took: 8m50.000739417s
I0823 13:44:16.434] W0823 13:44:16.433780    7517 reflector.go:270] k8s.io/kubernetes/test/utils/pod_store.go:56: watch of *v1.Pod ended with: too old resource version: 624915 (659380)
I0823 13:44:32.282] Aug 23 13:44:32.282: INFO: Terminating { ReplicationController} density43650-9-584f5bb0-a6d6-11e8-b145-0a580a3c6f08 pods took: 9m50.000486689s
I0823 13:44:42.283] Aug 23 13:44:42.282: INFO: Unexpected error occurred: error while waiting for pods to become inactive density43650-2-584f5bb0-a6d6-11e8-b145-0a580a3c6f08: timed out waiting for the condition
I0823 13:44:42.331] Aug 23 13:44:42.331: INFO: Unexpected error occurred: error while waiting for pods to become inactive density43650-1-584f5bb0-a6d6-11e8-b145-0a580a3c6f08: timed out waiting for the condition
I0823 13:44:42.333] Aug 23 13:44:42.332: INFO: Unexpected error occurred: error while waiting for pods to become inactive density43650-6-584f5bb0-a6d6-11e8-b145-0a580a3c6f08: timed out waiting for the condition
I0823 13:44:42.334] Aug 23 13:44:42.333: INFO: Unexpected error occurred: error while waiting for pods to become inactive density43650-13-584f5bb0-a6d6-11e8-b145-0a580a3c6f08: timed out waiting for the condition
I0823 13:44:42.437] Aug 23 13:44:42.436: INFO: Unexpected error occurred: error while waiting for pods to become inactive density43650-3-584f5bb0-a6d6-11e8-b145-0a580a3c6f08: timed out waiting for the condition
```

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Add timeout to MIG wait-until-stable operation

Fixes https://github.com/kubernetes/kubernetes/issues/67374

/cc @wojtek-t @mborsz 
/sig cluster-lifecycle

```release-note
NONE
```

Duration of initialization taint on CPU and window of initial readiness
setting controlled by flags.

Adding API violation exceptions following example of e50340ee

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Change README links to https

**What this PR does / why we need it**:
Changes links referenced in README.md to https. No visual changes to people, just more safety.

```release-note
NONE
```

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Parallelize kubemark cluster creation

To help with https://github.com/kubernetes/test-infra/issues/8348 (should hopefully cut down ~3mins - we're already down to 1h15m from earlier)

/cc @wojtek-t 

```release-note
NONE
```

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Typo in changelog 1.11

There is no small PR 😄 !

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fix typo

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

fix typo:
transfering -> transferring

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

anymore.
See kubernetes/kubernetes/pull/66442 for discussions.

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Fix golint error under scheduler/algorithm/priorities.

**What this PR does / why we need it**:
Fix golint error under scheduler/algorithm/priorities.

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
NONE

**Special notes for your reviewer**:
NONE

**Release note**:

```release-note
NONE
```

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Better error message when checking rollout status for StatefulSet wit…

…h OnDelete strategy type



**What this PR does / why we need it**: The error message when checking the rollout status for a StatefulSet with the OnDelete strategy type can be confusing (ref #64500). It gives the impression that something has gone wrong when the issue is simply that there is no rollout status. The error message is updated to use similar language as for DaemonSet in the same situation.

**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
Improved error message when checking the rollout status of StatefulSet with OnDelete strategy type
```

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Runtimeclass podapi

Adds (but doesn't implement) the RuntimeClass Pod API proposed in https://github.com/kubernetes/community/blob/master/keps/sig-node/0014-runtime-class.md

Based on the result (lazy consensus) of the alpha fields discussion on sig-architecture: https://groups.google.com/forum/#!topic/kubernetes-sig-architecture/y9FulL9Uq6A

For https://github.com/kubernetes/features/issues/585

**Special notes for your reviewer**:

**Release note**:
```release-note
RuntimeClass is a new API resource for defining different classes of runtimes that may be used to run containers in the cluster. Pods can select a RunitmeClass to use via the RuntimeClassName field. This feature is in alpha, and the RuntimeClass feature gate must be enabled in order to use it.
```

/sig node
/kind api-change
/priority important-soon
/milestone v1.12

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svcacct: support jose.OpaqueSigner and push errors to token generator creation

```release-note
NONE
```

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diff: Fix crash when remote object doesn't exist

Since we're saving nil in an interface rather than the implementation,
we can't compare to nil to check if the remote object exists or
not. Change the struct to save in the implementation.



**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
NONE
```

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fix kubelet iptclient in ipv6 cluster

**What this PR does / why we need it**:
Kubelet uses "iptables" instead of "ip6tables" in an ipv6-only cluster. This causes failed traffic for type: LoadBalancer services (and probably a lot of other problems).

**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 #67398 

**Special notes for your reviewer**:


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

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test: allow etcd to run on other ports.

running `make test-integration` with the `ETCD_PORT` option set should
work. Numerous integration test expect the correct URL to be populated
in the `KUBE_INTEGRATION_ETCD_URL` environment variable.



**What this PR does / why we need it**:
This makes the ETCD_PORT option work correctly.

**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**:
I expect nobody is using the ETCD_PORT option, but I noticed that it is broken.

**Release note**:

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

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Typo Fix

- nothing much here just a typo fix found when copying and pasting into a kops [#PR5349](https://github.com/kubernetes/kops/pull/5349)

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Add labels to kubectl OWNERS files

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

This change makes it possible to automatically add the two labels: `area/kubectl` and `sig/cli` to PRs that touch the paths in question.

this already exists for kubeadm:
https://github.com/kubernetes/kubernetes/blob/master/cmd/kubeadm/OWNERS#L17-L19

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
refs https://github.com/kubernetes/community/issues/1808

**Special notes for your reviewer**:
none

**Release note**:

```release-note
NONE
```
/area kubectl
@kubernetes/sig-cli-pr-reviews 
/cc @cblecker @tpepper

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remove rescheduler since scheduling DS pods by default scheduler is moving to beta

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

remove rescheduler since scheduling DS pods by default scheduler is moving to beta

**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 #64725

**Special notes for your reviewer**:

**Release note**:
```release-note
Remove rescheduler since scheduling DS pods by default scheduler is moving to beta.
```

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Pod Ready++ cont

```release-note
Turn on PodReadinessGate by default
```

ref: https://github.com/kubernetes/community/blob/master/keps/sig-network/0007-pod-ready%2B%2B.md

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Reduce latency to node ready after CIDR is assigned.

This adds code to execute an immediate runtime and node status update when the Kubelet sees that it has a CIDR, which significantly decreases the latency to node ready.

```release-note
Speed up kubelet start time by executing an immediate runtime and node status update when the Kubelet sees that it has a CIDR.
```

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Remove second round of scaling in load test

As it seems redundant to do this twice, not really adding much value. This should cut down ~1.5h in our 5k-node load tests, and helps a bit with https://github.com/kubernetes/test-infra/issues/8348.

/cc @wojtek-t 

```release-note
NONE
```