This PR adds the support for allocatable local storage (scratch space).
This feature is only for root file system which is shared by kubernetes
componenets, users' containers and/or images. User could use
--kube-reserved flag to reserve the storage for kube system components.
If the allocatable storage for user's pods is used up, some pods will be
evicted to free the storage resource.

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fix comment error in function newVolumeMounterFromPlugins

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

Fix the comment error in function newVolumeMounterFromPlugins, which may cause confusion.

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try to deflake CR watches in tests

Fixes https://github.com/kubernetes/kubernetes/issues/46446

I've added a comment trying to explain the reasoning in the code.  Without being able to expose the RV of the cache, I can't think of a reliable way to do it.  Even if you tried experimenting with a watch, it essentially does this since you'd be waiting to not get an error.

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apiserver: add a webhook implementation of the audit backend

This builds off of #45315 and is intended to implement an interfaced defined in #45766.

TODO:

- [x] Rebase on top of API types PR.
- [x] Rebase on top of API types updates (#46065)
- [x] Rebase on top of feature flag (#46009)
- [x] Rebase on top of audit instrumentation.
- [x] Hook up API server flag or register plugin (depending on #45766)

Features issue https://github.com/kubernetes/features/issues/22

Design proposal https://github.com/kubernetes/community/blob/master/contributors/design-proposals/auditing.md

```release-notes
Webhook added to the API server which omits structured audit log events.
```

/cc @soltysh @timstclair @soltysh @deads2k

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resolv.conf nameserver line has only one entry, ignore trailing garbage

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

Per the resolv.conf man page "name servers may be  listed,  one  per  keyword." Some tools such as udhcpc take advantage of this to append comments to nameserver entries. For example: `nameserver 8.8.8.8 # eth0`. This updates the resolv.conf parser to ignore trailing garbage on nameserver lines.

**Release note**:
NONE

Added API node ready check after PD test deleting a GCE instance.

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Set Kubelet Disk Defaults for the 1.7 release

The `--low-diskspace-threshold-mb` flag has been depreciated since 1.6.
This PR sets the default to `0`, and sets defaults for disk eviction based on the values used for our [e2e tests](https://github.com/kubernetes/kubernetes/blob/master/test/e2e_node/services/kubelet.go#L145).
This also removes the custom defaults for vagrant, as the new defaults should work for it as well.

/assign @derekwaynecarr 
cc @vishh 

```release-note
By default, --low-diskspace-threshold-mb is not set, and --eviction-hard includes "nodefs.available<10%,nodefs.inodesFree<5%"
```

Revert "kubelet/network: report but tolerate errors returned from GetNetNS()"

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Add Local Storage Capacity Isolation API

This PR adds the new APIs to support storage capacity isolation as
described in the proposal [https://github.com/kubernetes/community/pull/306](url)

1. Add SizeLimit for emptyDir volume
2. Add scratch and overlay storage type used by container level or
node level


**Release note**:

```release-note
Alpha feature: Local volume Storage Capacity Isolation allows users to set storage limit to isolate EmptyDir volumes, container storage overlay, and also supports allocatable storage for shared root file system. 
```

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support setElementOrder

Implement [proposal](https://github.com/kubernetes/community/blob/master/contributors/design-proposals/preserve-order-in-strategic-merge-patch.md).

Fixes #40373

```release-note
kubectl edit and kubectl apply will keep the ordering of elements in merged lists
```

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Disable all alpha feature gates by default in local-up-cluster.sh

**What this PR does / why we need it**:
Disable all alpha feature gates by default in local-up-cluster.sh
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #46691

**Special notes for your reviewer**:

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

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hack/verify-staging-imports.sh: simplify by negating package list

The forbidden list of repos got lengthy. The inverse is much shorter and easiert to maintain.

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Extract volume relevant events reason

Extract volume relevant events reason and make them const


**Release note**:

```release-note
NONE
```

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Update fluentd-gcp version

Updates the `fluent-plugin-google-cloud` version to `0.6.2`. This patch containes bug fixes

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Checked node condition for DaemonSets when updating node.

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #45628

**Release note**:

```release-note-none
```

Automatic merge from submit-queue (batch tested with PRs 43505, 45168, 46439, 46677, 46623)

aggregator: unify resolver implementation and tests

This is https://github.com/kubernetes/kubernetes/pull/45082, but without the port support.

Automatic merge from submit-queue (batch tested with PRs 43505, 45168, 46439, 46677, 46623)

Add TPR to CRD migration helper.

This is a helper for migrating TPR data to CustomResource. It's rather hacky because it requires crossing apiserver boundaries, but doing it this way keeps the mess contained to the TPR code, which is scheduled for deletion anyway.

It's also not completely hands-free because making it resilient enough to be completely automated is too involved to be worth it for an alpha-to-beta migration, and would require investing significant effort to fix up soon-to-be-deleted TPR code. Instead, this feature will be documented as a best-effort helper whose results should be verified by hand.

The intended benefit of this over a totally manual process is that it should be possible to copy TPR data into a CRD without having to tear everything down in the middle. The process would look like this:

1. Upgrade to k8s 1.7. Nothing happens to your TPRs.
1. Create CRD with group/version and resource names that match the TPR. Still nothing happens to your TPRs, as the CRD is hidden by the overlapping TPR.
1. Delete the TPR. The TPR data is converted to CustomResource data, and the CRD begins serving at the same REST path.

Note that the old TPR data is left behind by this process, so watchers should not receive DELETE events. This also means the user can revert to the pre-migration state by recreating the TPR definition.

Ref. https://github.com/kubernetes/kubernetes/issues/45728

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Test finalization for CRs

**What this PR does / why we need it**:
Updates #45511 with a test for finalizers for CRDs.

**Release note**:
```release-note
NONE
```
@deads2k

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fix AWS tagging to add missing tags only

It seems that intention of original code was to build map of missing
tags and call AWS API to add just them, but due to typo full
set of tags was always (re)added

```release-note
NONE
```

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unit test for kubectl config set-cluster

**What this PR does / why we need it**:
unit test for create cluster

**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**:
i want test secure mode,but CA path how set?

**Release note**:

```release-note
NONE
```

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Performance tests also cover configmaps now

Similar to secrets.
We should be able to get this in once https://github.com/kubernetes/kubernetes/pull/46470 is merged.

/cc @wojtek-t @gmarek

Automatic merge from submit-queue (batch tested with PRs 46686, 45049, 46323, 45708, 46487)

set LANG to 'C' in Makefile

Now we support multi-languages:
https://github.com/kubernetes/kubernetes/tree/master/translations

But some tests support only English. This test fails when LANG is set to zh_CN.UTF-8:
https://github.com/kubernetes/kubernetes/blob/master/hack/make-rules/test-cmd-util.sh#L2838
The expected err string is translated to Chinese:
https://github.com/kubernetes/kubernetes/blob/master/translations/kubectl/zh_CN/LC_MESSAGES/k8s.po#L82

**Release note**:

```
NONE
```

Automatic merge from submit-queue (batch tested with PRs 46686, 45049, 46323, 45708, 46487)

add some full stop and change some format

Automatic merge from submit-queue (batch tested with PRs 46686, 45049, 46323, 45708, 46487)

[Federation][kubefed]: Use StorageClassName for etcd pvc

This PR updates kubefed to use the StorageClassName field [added in 1.6](http://blog.kubernetes.io/2017/03/dynamic-provisioning-and-storage-classes-kubernetes.html
) for etcd's pvc to allow the user to specify which storage class they want to use.  If no value is provided to ``kubefed init``, the field will not be set, and initialization of the pvc may fail on a cluster without a default storage class configured.

The alpha annotation that was previously used (``volume.alpha.kubernetes.io/storage-class``) was deprecated as of 1.4 according to the following blog post:

http://blog.kubernetes.io/2016/10/dynamic-provisioning-and-storage-in-kubernetes.html

**Release note**:

```
'kubefed init' has been updated to support specification of the storage class (via --etcd-pv-storage-class) for the Persistent Volume Claim (PVC) used for etcd storage.  If --etcd-pv-storage-class is not specified, the default storage class configured for the cluster will be used.
```

cc: @kubernetes/sig-federation-pr-reviews

Automatic merge from submit-queue (batch tested with PRs 46686, 45049, 46323, 45708, 46487)

Log an EBS vol's instance when attaching fails because VolumeInUse

Messages now look something like this:
E0427 15:44:37.617134   16932 attacher.go:73] Error attaching volume "vol-00095ddceae1a96ed": Error attaching EBS volume "vol-00095ddceae1a96ed" to instance "i-245203b7": VolumeInUse: vol-00095ddceae1a96ed is already attached to an instance
        status code: 400, request id: f510c439-64fe-43ea-b3ef-f496a5cd0577. The volume is currently attached to instance "i-072d9328131bcd9cd"
weird that AWS doesn't bother to put that information in there for us (it does when you try to delete a vol that's in use)
```release-note
NONE
```

Automatic merge from submit-queue (batch tested with PRs 46686, 45049, 46323, 45708, 46487)

Update deprecated flags for "make test-cmd"

**Release note**:

```
NONE
```

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Migrate kubelet to ConfigMapManager interface and use TTL-based caching manager

Fixes #41379
Sometime ago we moved to a secret manager interface for kubelet to manage secrets.
This PR's first commit moves config map management also to a similar interface.
The second commit adds TTL-based CachingConfigMapManager (similar to CachingSecretManager) and makes kubelet use it.

/cc @kubernetes/sig-node-pr-reviews @kubernetes/sig-scalability-misc @wojtek-t @dchen1107

- Need to ensure that all nodes are ready, i.e. back to the state before the test.

Updates #45511