Automatic merge from submit-queue

StatefulSet scale subresource

**What this PR does / why we need it**: This PR implements scale subresource for StatefulSet.

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #46005

**Special notes for your reviewer**:

**Release note**:

```release-note
StatefulSet uses scale subresource when scaling in accord with ReplicationController, ReplicaSet, and Deployment implementations.
```
**Feature Checklist**:
- [x] Introduce Registry interface for storage purpose
- [x] Introduce `ScaleREST New(), Get() and Update()` utility functions
- [x] Create a `ScaleREST` object at `NewREST()` and return it
- [x] Enable scale subresource by adding `/scale` field to the storage map

**Testing Checklist**:
- Unit testing
  - [x] Modify `newStorage()` to call `NewStorage()`, and change all unit tests accordingly
  - [x] Add unit tests for `ScaleREST Get() and Update()` utility functions
  - [x] Add missing unit test for `ShortNames`

- Manual testing
  - [x] Verify existence of the subresource using `kubectl proxy` command
  - [x] Modify the subresource using `curl` via `POST`

- e2e testing
  - [x] Add e2e tests using `RESTClient`

Automatic merge from submit-queue

Federated Job controller implementation

Note that job re-balance is not there yet as it's difficult to honor job deadline

requires #35945 and 35943
fixes #34261
@quinton-hoole @nikhiljindal @deepak-vij

**Release note**:
```release-note
Federated Job feature.  It is now possible to create a Federated Job 
that is automatically deployed to one or more federated clusters 
(as Jobs in those clusters).    Job parallelism and completions are 
spread across clusters according to cluster selection and weighting 
preferences.  Federated Job status reflects the aggregate status 
across all underlying cluster Jobs.
```

Automatic merge from submit-queue

Add Shashi as approver for e2e_federation

**Release note**:

```NONE
```

Automatic merge from submit-queue (batch tested with PRs 49524, 46760, 50206, 50166, 49603)

Fix errorf for get test

**What this PR does / why we need it**:
If the error messages do not use format, use t.Error() will be fine.

**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 49524, 46760, 50206, 50166, 49603)

Handle missing OpenAPI specs on aggregated servers

Previously, the aggregator would fail to actually set up the aggregator
proxy for an API server that was missing an OpenAPI spec.  It would show
up in discovery, but the actual proxying would fail to occur.

Now, we simply log an error if we can't fetch an OpenAPI spec for a
particular aggregated server, and continue on.

Fixes #50165

```release-note
NONE
```

Automatic merge from submit-queue (batch tested with PRs 49524, 46760, 50206, 50166, 49603)

[OpenStack] Add more detail error message

I get same simple error messages "Unable to initialize cinder client
for region: RegionOne" from controller-manager, but I can not find the
reason. We should add more detail message "err" into glog.Errorf.

Currently NewBlockStorageV2() return err when failed to get cinder endpoint, but there is no code to output the message of err.

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

Automatic merge from submit-queue (batch tested with PRs 49524, 46760, 50206, 50166, 49603)

fix parse pairs

**What this PR does / why we need it**:
add check to `-`
```
# kubectl label pod foo -               
error: at least one label update is required
See 'kubectl label -h' for help and examples.
```

**Which issue this PR fixes**: 

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```

Automatic merge from submit-queue (batch tested with PRs 49524, 46760, 50206, 50166, 49603)

Handled taints on node in batch.

**What this PR does / why we need it**:
Enhanced helpers to handled taints on node in batch.

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #49522 

**Release note**:

```release-note
None
```

Automatic merge from submit-queue (batch tested with PRs 49885, 49751, 49441, 49952, 49945)

Rename e2e sig framework files

**What this PR does / why we need it**:
make files be consistent across all sig e2e tests dir.

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #
Umbrella issue #49161

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```

Automatic merge from submit-queue (batch tested with PRs 49885, 49751, 49441, 49952, 49945)

There is no need to split service key repeatedly

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

Automatic merge from submit-queue (batch tested with PRs 49885, 49751, 49441, 49952, 49945)

Fix error format and info for get_test.go

**What this PR does / why we need it**:
Fix error format and info for get_test.go
**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 49885, 49751, 49441, 49952, 49945)

Add conversion-gen between extensions and apps

Fixes #49738

Generate conversion code for apps/v1beta1 <--> extensions and apps/v1beta2 <--> extensions

@kubernetes/sig-apps-api-reviews @kubernetes/sig-api-machinery-misc

Automatic merge from submit-queue (batch tested with PRs 49885, 49751, 49441, 49952, 49945)

Ignore UDP metrics in kubelet

Updating cadvisor godeps to 0.26.0 for the 1.7 release (#46658) added udp metrics.  However, they were not disabled in the kubelet.
This PR disables collection of UDP metrics in the kubelet.
This should be cherrypicked to the 1.7 branch.

cc @dchen1107

Automatic merge from submit-queue (batch tested with PRs 50087, 39587, 50042, 50241, 49914)

Add node e2e test for Docker's shared PID namespace

Ref: https://github.com/kubernetes/kubernetes/issues/42926

This PR adds a simple test for the shared PID namespace that's enabled when Docker is 1.13.1+.

/sig node
/area node-e2e
/assign @yujuhong 

**Release note**:
```
None
```

Automatic merge from submit-queue (batch tested with PRs 50087, 39587, 50042, 50241, 49914)

Enable selfHosted feature flag

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

Enables feature gating for self-hosting on kubeadm

**Which issue this PR fixes**

Continuation of https://github.com/kubernetes/kubeadm/issues/323

**Release note**:
```release-note
Feature gates now determine whether a cluster is self-hosted. For more information, see the FeatureGates configuration flag.
```

/cc @luxas

Automatic merge from submit-queue (batch tested with PRs 50087, 39587, 50042, 50241, 49914)

AttachDisk should not call detach inside of Cinder volume provider

Automatic merge from submit-queue (batch tested with PRs 50087, 39587, 50042, 50241, 49914)

plugin/pkg/client/auth: add openstack auth provider

This is an implementation of auth provider for OpenStack world, just like python-openstackclient, we read the environment variables of a list `OS_*`, and client will cache a token to interact with each components, we can do the same here, the client side can cache a token locally at the first time, and rotate automatically when it expires.

This requires an implementation of token authenticator at server side, refer:

1.  [made by me] https://github.com/kubernetes/kubernetes/pull/25536, I can carry this on when it is fine to go.
2.  [made by @kfox1111] https://github.com/kubernetes/kubernetes/pull/25391

The reason why I want to add this is due to the `client-side` nature, it will be confusing to implement it downstream, we would like to add this support here, and customers can get `kubectl` like they usually do(`brew install kubernetes-cli`), and it will just work.

When this is done, we can deprecate the password keystone authenticator as the following reasons:

1.  as mentioned at some other places, the `domain` is another parameters which should be provided.
2.  in case the user supplies `apikey` and `secrets`, we might want to fill the `UserInfo` with the real name which is not implemented for now.

cc @erictune @liggitt 

```
add openstack auth provider
```

Automatic merge from submit-queue (batch tested with PRs 50087, 39587, 50042, 50241, 49914)

convert default predicates to use the default

Builds on https://github.com/kubernetes/kubernetes/pull/50019 (lgtm'd already)

This converts the already default field selectors to use the default value.  I'll let CI point out the unit test failures for me to chase.

@kubernetes/sig-api-machinery-misc

Previously, the aggregator would fail to actually set up the aggregator
proxy for an API server that was missing an OpenAPI spec.  It would show
up in discovery, but the actual proxying would fail to occur.

Now, we simply log an error if we can't fetch an OpenAPI spec for a
particular aggregated server, and continue on.

Automatic merge from submit-queue (batch tested with PRs 50091, 50231, 50238, 50236, 50243)

Fix storage tests for multizone test configuration.

**What this PR does / why we need it**:
This PR modifies "[sig-storage] Volumes PD should be mountable with (ext3|ext4)" tests to schedule pods in zone, where PD is created.
This is to make the test work in multizone environment.

**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
```

Automatic merge from submit-queue (batch tested with PRs 50091, 50231, 50238, 50236, 50243)

Move the sig-instrumentation test to a dedicated folder

Move the last remaining test to sig-instrumentation folder, also move "metrics" package to the "framework" folder

Related issue: https://github.com/kubernetes/kubernetes/issues/49161

/cc @xiangpengzhao @piosz

Automatic merge from submit-queue (batch tested with PRs 50091, 50231, 50238, 50236, 50243)

Modify e2e.go to arbitrarily pick one of zones we have nodes in for multizone tests.

**What this PR does / why we need it**:
When e2e runs in multizone configuration, zone config property can be empty.
This PR, in that case, overrides an empty value with arbitrarily chosen zone that we have nodes in.

**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
```

Automatic merge from submit-queue (batch tested with PRs 50091, 50231, 50238, 50236, 50243)

Fix Stackdriver Logging soak tests issues

It mostly addressed occasional panics and too verbose logs about ingestion

Fixes https://github.com/kubernetes/kubernetes/issues/50237

/cc @piosz @x13n

Automatic merge from submit-queue (batch tested with PRs 50091, 50231, 50238, 50236, 50243)

add fieldSelector podIP

**What this PR does / why we need it**:
Currently the `fieldSelector` for `Pod` only support `metadata.name`, `metadata.namespace`, `spec.nodeName`, `spec.restartPolicy` and `status.phase`.

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #50075

**Special notes for your reviewer**:
/cc @wojtek-t @caesarxuchao @justinsb @LiliC

**Release note**:

```release-note
add fieldSelector podIP
```

Automatic merge from submit-queue

fix typo in replenishment_controller.go

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

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

**Release note**:
```release-note
None
```

Automatic merge from submit-queue (batch tested with PRs 49868, 50143, 49377, 50141, 50145)

Add MicroTime to DeepEquals overrides

Automatic merge from submit-queue (batch tested with PRs 49868, 50143, 49377, 50141, 50145)

Don't expect internal clientset to be generated for groups without ne…

…w types

Automatic merge from submit-queue (batch tested with PRs 49868, 50143, 49377, 50141, 50145)

Return Audit-Id http response header for trouble shooting

Users can use Audit-Id http response header to grep the audit events in log.
This provides a fast way to find the events in audit.
**Release note**:

```
Audit-Id HTTP header is included in the apiserver responses for audited requests, except some cases when it's not possible, e.g. pods/exec.
```
@sttts @tallclair

Automatic merge from submit-queue (batch tested with PRs 49868, 50143, 49377, 50141, 50145)

Add metav1.MicroTime to exceptions in tag tests

Automatic merge from submit-queue (batch tested with PRs 49868, 50143, 49377, 50141, 50145)

Status objects for 404 API errors will have the correct APIVersion

Fixes https://github.com/kubernetes/kubernetes/issues/48959
superseded https://github.com/kubernetes/kubernetes/pull/49183


```release-note 
Status objects for 404 API errors will have the correct APIVersion
```