Automatic merge from submit-queue (batch tested with PRs 48555, 48849)

GCE: Fix panic when service loadbalancer has static IP address

Fixes #48848 

```release-note
Fix service controller crash loop when Service with GCP LoadBalancer uses static IP (#48848, @nicksardo)
```

Automatic merge from submit-queue

Fix subPath existence check to not follow symlink

**What this PR does / why we need it**:
Volume mounting logic introduced in #43775 and #45623 checks
for subPath existence before attempting to create a directory,
should subPath not be present.

This breaks if subPath is a dangling symlink, os.Stat returns
"do not exist" status, yet `os.MkdirAll` can't create directory
as symlink is present at the given path.

This patch makes existence check to use os.Lstat which works for
normal files/directories as well as doesn't not attempt to follow
symlink, therefore it's "do not exist" status is more reliable when
making a decision whether to create directory or not.

subPath symlinks can be dangling in situations where kubelet is
running in a container itself with access to docker socket, such
as CoreOS's kubelet-wrapper script

**Release note**:
```release-note
Fix pods failing to start when subPath is a dangling symlink from kubelet point of view, which can happen if it is running inside a container
```

Automatic merge from submit-queue

add [sig-apps] identifier to relevant upgrade tests

**What this PR does / why we need it**: This PR adds [sig-apps] identifier to relevant upgrade tests.

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: xref #48839

**Special notes for your reviewer**:

**Release note**:

```release-note
```

Automatic merge from submit-queue

add [sig-apps] prefix to workload e2e tests

**What this PR does / why we need it**: This PR adds [sig-apps] prefix to workload e2e tests in accord to requirements of adding a SIG dashboard to testgrid. Refer PR #48781 for guidelines.

**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

Support GCE alpha/beta api endpoint override

fixes: https://github.com/kubernetes/kubernetes/issues/48568

Automatic merge from submit-queue

maxinflight handler should let panicrecovery handler call NewLogged

Fixes #48700 #48782 

/cc @deads2k @sttts

Automatic merge from submit-queue (batch tested with PRs 46738, 48827, 48831)

Add test for kubectl resource filter.

This should prevent regression of the bug fixed in #48786.

Automatic merge from submit-queue (batch tested with PRs 46738, 48827, 48831)

Moving disruption controller e2es to workload/

Based on #45301
Moving to track sig-apps in a single directory

cc @kubernetes/sig-contributor-experience-misc @kubernetes/sig-apps-misc @erictune @kow3ns @crimsonfaith91

Automatic merge from submit-queue

StatefulSet upgrade test - replicated database (mysql)

**What this PR does / why we need it**:
Adds a new upgrade test. The test creates a statefulset with a replicated mysql database. It populates the database and then continually polls the data while performing an upgrade. 

Ultimately, this PR increases confidence of reliability during upgrades. It helps show that StatefulSets and Pod Disruption Budgets are doing what they're supposed to.  Code to pay attention to this was added for #38336.

Also vendors in a golang mysql client driver, for use in the test.

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

Automatic merge from submit-queue (batch tested with PRs 48781, 48817, 48830, 48829, 48053)

kubeadm: Start to remove old envparams

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

Historically, the envparams feature was used as a way to easily debug `kubeadm` while developing it in the v1.3-v1.4 timeframe. Since then some parameters have been hanging around and not being moved into the API as they should have.

Note: This is a temporary step; moving things into the API. Still, the API is gonna change, this is not the end state. But this is better than keeping the envparams.

I'm gonna deal with `KubernetesDir` in the next PR.

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

Fixes: kubernetes/kubeadm#326

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```
@timothysc @pipejakob

Automatic merge from submit-queue (batch tested with PRs 48781, 48817, 48830, 48829, 48053)

vSphere for cloud-controller-manager

**What this PR does / why we need it**:
This is to implement the `NodeAddressesByProviderID` and `InstanceTypeByProviderID` methods for cloud-controller-manager for vSphere cloud provider.

Currently vSphere cloud provider only supports VMs in the same folder.
Thus `NodeAddressesByProviderID` is similar to `NodeAddresses` with a simple ProviderID to NodeName translation.

`InstanceTypeByProviderID`  returns nil as same as `InstanceType`.

**Which issue this PR fixes**
Part of Issue https://github.com/kubernetes/kubernetes/issues/47257

**Release note**:
```NONE
```

Automatic merge from submit-queue (batch tested with PRs 48781, 48817, 48830, 48829, 48053)

Fix yaml-quote typo

Caught this looking through CI logs.

/assign wojtek-t

Automatic merge from submit-queue (batch tested with PRs 48781, 48817, 48830, 48829, 48053)

Move kubectl e2e tests to their own directory and prefix the test nam…

```release-note
NONE
```

Automatic merge from submit-queue

Make storage e2e tests start with [sig-storage] instead of [k8s.io].

This makes understanding sig ownership from a test name very easy for
tools and humans.

- Use a SIGDescribe helper function that adds a [sig-storage] prefix instead of [k8s.io] for tests in storage/
- Move a test that should be in storage into storage.
- Make tests owned by multiple SIGs (configmap test) have [sig-storage] instead of [Volume] labels.

This means that all tests that sig-storage directly owns can be found with a simple regex.

/cc @kubernetes/sig-storage-pr-reviews 

**What this PR does / why we need it**:
This will be used to make a testgrid dashboard for sig-storage.

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

Issue #48779

Automatic merge from submit-queue (batch tested with PRs 48594, 47042, 48801, 48641, 48243)

Add initial support for the Azure instance metadata service.

Part of fixing #46632

@colemickens @rootfs @jdumars @kris-nova

Automatic merge from submit-queue (batch tested with PRs 48594, 47042, 48801, 48641, 48243)

Prepare to introduce websockets for exec and portforward

Refactor the code in remotecommand to better represent the structure of
what is common between portforward and exec.

Ref #48633

Automatic merge from submit-queue (batch tested with PRs 48594, 47042, 48801, 48641, 48243)

Fix panic of DeleteRoute()

Fix #48800
It should be 'addr_pairs', not 'routes'.

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

Automatic merge from submit-queue (batch tested with PRs 48594, 47042, 48801, 48641, 48243)

Validated expected event numbers for damoncontroller test.

**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 #46629

**Special notes for your reviewer**:

**Release note**:

```release-note
none
```

Automatic merge from submit-queue

Add node-name flag to `init` phase

**What this PR does / why we need it**: Allow to specify a node-name instead of relaying in `os.Hostname()`
This is useful where kubelet use the name given by the cloud-provider to
register the node.

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: Partially fix: kubernetes/kubeadm#64

**Release note**:
```release-note
Added new flag to `kubeadm init`: --node-name, that lets you specify the name of the Node object that will be created
```

Automatic merge from submit-queue

Remove dead code for OpenStack provider

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

Automatic merge from submit-queue (batch tested with PRs 48279, 48566, 48319, 48794, 47952)

Added pod evictors for new zone.

**What this PR does / why we need it**:
Added pod evictors for new zone which was added manually.

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #47791 

**Release note**:
```release-note-none
```

Automatic merge from submit-queue (batch tested with PRs 48279, 48566, 48319, 48794, 47952)

Removed mesos flags from known-flags.txt.

**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 #

**Special notes for your reviewer**:

**Release note**:

```release-note
none
```

Automatic merge from submit-queue (batch tested with PRs 48279, 48566, 48319, 48794, 47952)

Helper methods dealing with ControllerRef

**What this PR does / why we need it**:
Adds helper methods for working with **controllerRef** (controller's `OwnerReference`).

It is based on the existing code from Kubernetes plus extracting some common logic:
- `NewControllerRef` is based on examples from [daemon controller](https://github.com/kubernetes/kubernetes/blob/master/pkg/controller/daemon/daemoncontroller.go#L1223), [deployment controller](https://github.com/kubernetes/kubernetes/blob/master/pkg/controller/deployment/sync.go#L649), [job controller](https://github.com/kubernetes/kubernetes/blob/master/pkg/controller/job/utils.go#L34)
- `GetControllerOf` is copied from [controller_ref_manager.go](https://github.com/kubernetes/kubernetes/blob/master/pkg/controller/controller_ref_manager.go#L36)
- `IsControlledBy` is a common logic extracted from resource controllers: [deployment_util.go#L568](https://github.com/kubernetes/kubernetes/blob/master/pkg/controller/deployment/util/deployment_util.go#L568), [history.go#L276](https://github.com/kubernetes/kubernetes/blob/master/pkg/kubectl/history.go#L276) and many others.

It will also be useful for writing custom resource controllers, for example [service-catalog#979](https://github.com/kubernetes-incubator/service-catalog/pull/979)

Automatic merge from submit-queue (batch tested with PRs 48279, 48566, 48319, 48794, 47952)

Add prometheus plugin on fluentd image.

**What this PR does / why we need it**:
This PR adds the prometheus plugin on Fluentd.

**Special notes for your reviewer**:
The plugin used was: https://github.com/kazegusuri/fluent-plugin-prometheus, on the latest stable version.
All configs used are default.

**Release note**:

```release-note
Fluentd-es addon now exposes a /metrics endpoint for monitoring on port 24231. 
```

Automatic merge from submit-queue

Use Container-optimzed OS images for nodes by default

Part of the deprecation of the debian-based ContainerVM images.

```release-note
kube-up and kubemark will default to using cos (GCI) images for nodes.
The previous default was container-vm (CVM, "debian"), which is deprecated.
If you need to explicitly use container-vm for some reason, you should set
KUBE_NODE_OS_DISTRIBUTION=debian
```

Implement NodeAddressesByProviderID and InstanceTypeByProviderID for vsphere cloud provider.