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rkt: Force `rkt fetch` to fetch from remote to conform the image pull policy.

Fix https://github.com/kubernetes/kubernetes/issues/27646

Use `--no-store` option for `rkt fetch` to force it to fetch from remote.
However, `--no-store` will fetch the remote image regardless of whether the content of the image has changed or not. 
This causes performance downgrade when the image tag is ':latest' and the image pull policy is 'always'. 
The issue is tracked in https://github.com/coreos/rkt/issues/2937.

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Nginx ingress e2es

Runs the basic ingress conformance suite: https://github.com/kubernetes/kubernetes/blob/master/test/e2e/ingress_utils.go#L85

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Print to stderr when attach failed

@kubernetes/kubectl

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Build and push kube-dns for 1.4 release.

Fix #31355.

Following docker images had been uploaded:
gcr.io/google_containers/kubedns-amd64:1.7
gcr.io/google_containers/kubedns-arm:1.7
gcr.io/google_containers/kubedns-arm64:1.7

Build for ppc64le is disabled by default, and it failed to be built using:
`KUBE_BUILD_PPC64LE=y make release`

I'm still working on making the ppc64le build. Updates will be added following this thread.

@girishkalele @thockin

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Add ReclaimPolicy to the resource printer for 'get pv'

Propose we add the RECLAIMPOLICY (persistentVolumeReclaimPolicy) from resource_printer.go to show the policy when a user does a ```kubectl get pv```

```
[root@k8dev nfs]# kubectl get pv
NAME      CAPACITY   ACCESSMODES   RECLAIMPOLICY   STATUS      CLAIM     REASON    AGE
pv-nfs    1Gi        RWO           Retain          Available                       1m
pv-nfs2   1Gi        RWO           Delete          Available                       4s

```

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Allow services which use same port, different protocol to use the same nodePort for both

fix #20092

@thockin @smarterclayton ptal.

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Fix various typos in pkg/apis

Just fixed some typos + "englishify" some stuff in pkg/apis

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Handle overlapping deployments gracefully

Fixes #30028

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Filter internal Kubernetes labels from Prometheus metrics

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

Kubernetes uses Docker labels as storage for some internal labels. The
majority of these labels are not meaningful metric labels and a few of
them are even harmful as they're not static and cause wrong aggregation
results.

This change provides a custom labels func to only attach meaningful
labels to cAdvisor exported metrics.

**Which issue this PR fixes**

google/cadvisor#1312

**Special notes for your reviewer**:

Depends on google/cadvisor#1429. Once that is merged, I'll update the vendor update commit.

**Release note**:

```release-note
Remove environment variables and internal Kubernetes Docker labels from cAdvisor Prometheus metric labels.

Old behavior:

- environment variables explicitly whitelisted via --docker-env-metadata-whitelist were exported as `container_env_*=*`. Default is zero so by default non were exported
- all docker labels were exported as `container_label_*=*`

New behavior:

- Only `container_name`, `pod_name`, `namespace`, `id`, `image`, and `name` labels are exposed
- no environment variables will be exposed ever via /metrics, even if whitelisted
```

---

Given that we have full control over the exported label set, I shortened the pod_name, pod_namespace and container_name label names. Below an example of the change (reformatted for readability).

```
# BEFORE
container_cpu_cfs_periods_total{
  container_label_io_kubernetes_container_hash="5af8c3b4",
  container_label_io_kubernetes_container_name="sync",
  container_label_io_kubernetes_container_restartCount="1",
  container_label_io_kubernetes_container_terminationMessagePath="/dev/termination-log",
  container_label_io_kubernetes_pod_name="popularsearches-web-3165456836-2bfey",
  container_label_io_kubernetes_pod_namespace="popularsearches",
  container_label_io_kubernetes_pod_terminationGracePeriod="30",
  container_label_io_kubernetes_pod_uid="6a291e48-47c4-11e6-84a4-c81f66bdf8bd",
  id="/docker/68e1f15353921f4d6d4d998fa7293306c4ac828d04d1284e410ddaa75cf8cf25",
  image="redacted.com/popularsearches:42-16-ba6bd88",
  name="k8s_sync.5af8c3b4_popularsearches-web-3165456836-2bfey_popularsearches_6a291e48-47c4-11e6-84a4-c81f66bdf8bd_c02d3775"
} 72819

# AFTER
container_cpu_cfs_periods_total{
  container_name="sync",
  pod_name="popularsearches-web-3165456836-2bfey",
  namespace="popularsearches",
  id="/docker/68e1f15353921f4d6d4d998fa7293306c4ac828d04d1284e410ddaa75cf8cf25",
  image="redacted.com/popularsearches:42-16-ba6bd88",
  name="k8s_sync.5af8c3b4_popularsearches-web-3165456836-2bfey_popularsearches_6a291e48-47c4-11e6-84a4-c81f66bdf8bd_c02d3775"
} 72819
```

Feedback requested on:
* Label names. Other suggestions? Should we keep these very long ones?
* Do we need to export io.kubernetes.pod.uid? It makes working with the metrics a bit more complicated and the pod name is already unique at any time (but not over time). The UID is aslo part of `name`.

As discussed with @timstclair, this should be added to v1.4 as the current labels are harmful.

PTAL @jimmidyson @fabxc @vishh

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Filter duplicate network packets in promiscuous bridge mode (with ebtables)

also fixes: #30783

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Fix the creation of the jobResultsCache.json file.

Let's try this again.
ref https://github.com/kubernetes/release/pull/60

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Split the version metric out to its own package

This PR breaks a client dependency on prometheus. Combined with #30638, the client will no longer depend on these packages.

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minor client-go doc change

I'll test is after https://github.com/kubernetes/k8s.io/pull/8 is merged.

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Add ExternalName kube-dns e2e test

ExternalName allows kubedns to return CNAME records for external
services. No proxying is involved.

Built on top of and includes #30599 

See original issue at
https://github.com/kubernetes/kubernetes/issues/13748

Feature tracking at
https://github.com/kubernetes/features/issues/33

The e2e test is at least as comprehensive as the one for headless services (namely, only to some degree)

```release-note
Add ExternalName services as CNAME references to external ones
```

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Get 5 days of test history when updating test owners.

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return destroy func to clean up internal resources of storage

What?
Provide a destroy func to clean up internal resources of storage.
It changes **unit tests** to clean up resources. (Maybe fix integration test in another PR.)

Why?
Although apiserver is designed to be long running, there are some cases that it's not.
See https://github.com/kubernetes/kubernetes/issues/31262#issuecomment-242208771
We need to gracefully shutdown and clean up resources.

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Construct a valid json file for the job cache.

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gci: decouple from the built-in kubelet version

Prior to this change, configure.sh would:
(1) compare versions of built-in kubelet and downloaded kubelet, and
(2) bind-mount downloaded kubelet at /usr/bin/kubelet in case of
version mismatch
    
With this change, configure.sh:
(1) compares the two versions only on test clusters, and
(2) uses the actual file paths to start kubelet w/o any bind-mounting
    
To allow (2), this change also provides its own version of kubelet
systemd service file.
    
Effectively with this change we will always use the downloaded kubelet
binary along with its own systemd service file on non-test clusters.  The
main advantage is this change does not rely on the kubelet being built in to
the OS image.

@dchen1107 @wonderfly  can you please review

cc/ @kubernetes/goog-image FYI

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Improve godoc for goroutinemap

Improves the godoc of goroutinemap; found while preparing to use this type in another PR.

@saad-ali

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Fix sort hint in `hack/verify-golint.sh`

The `verify-golint.sh` sorts all items with `LANG=C sort`, but it only hints developers to use `sort`, which causes a little trouble for me.

/cc @jfrazelle  @sttts

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Node Conformance Test: Refactor node e2e framework

For #30122, #30174.
Based on #30348.

**Please only review the last 3 commits.**

This PR is part of our roadmap to package node conformance test.
The 1st commit is from #30348, it removed unnecessary dependencies in the node e2e test framework, because we've statically linked these dependencies.

The PR refactored the node e2e framework. Moving different utilities into different packages under `pkg/`.

We need to do this because:
1) Files like e2e_remote.go and e2e_build.go should only be used by runner, but they were compiled into the test suite because they were placed in the same package. The worst thing is that it will introduce some never used flags in the test suite binary.
2) Make the directory structure more clear. Only test should be placed in `test/e2e_node`, other utilities should be placed in different packages in `pkg/`.

@dchen1107 @vishh 
/cc @kubernetes/sig-node @kubernetes/sig-testing

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Refactor to simplify the hard-traveled path of the KubeletConfiguration object

### There are two main goals of this PR:
- Make `NewMainKubelet` take `KubeletConfiguration` and `KubeletDeps` as its only arguments.
- Finally eliminate the legacy `KubeletConfig` type.

### Why am I doing this?
Long story short, I started adding an endpoint to the Kubelet to display the *current* config that the Kubelet was running with, and I realized a few things:
- There were so many transformations to the configuration, in so many different places, before it was used that I wasn't confident the values initially passed in on the `KubeletConfiguration` would be the correct values to report by the time someone used the endpoint to check on them.
- Trying to reconstruct a `KubeletConfiguration` object from a mix of the `Kubelet` object and the legacy `KubeletConfig` object would just add to the mess (not to mention maintenance burden), and it would be much easier if we passed the `KubeletConfiguration` all the way down to where we construct the `Kubelet` object, and then just store a reference to the `KubeletConfiguration` object on the `Kubelet` for later retrieval. 
- My hope is that by eliminating unnecessary internal transformations to the config information, and by consolidating the remaining ones in a single place (`NewMainKubelet`), we can have a much clearer understanding of what happens to the config before it makes it to the `Kubelet` object, and also a better ability to report up-to-date information on the status of the Kubelet. 

So I started cleaning things up :-). 

### Discussion points

It was relatively simple to get `NewMainKubelet` to just take the legacy `KubeletConfig` as its only argument, because most of its arguments were just passing through `KubeletConfig` fields or passing information that was generated solely from `KubeletConfig` fields.

Completely eliminating the legacy `KubeletConfig` type has been more difficult, because the fields of the `KubeletConfiguration` do not have a one-to-one relationship with the fields of the `KubeletConfig`. While I was able to eliminate many of the `KubeletConfig` fields, I'm starting to get into the nontrivial stuff and I'd like to get a discussion started on what should happen with the remaining fields (pending cherry-picking notwithstanding). 

On my `kconf-refactor` branch, the legacy `KubeletConfig` object is down to the following 27 fields (from the initial 93). I'd really appreciate any guidance people have on what should happen with these fields.
```
type KubeletConfig struct {
	Auth                    server.AuthInterface
	AutoDetectCloudProvider bool
	Builder                 KubeletBuilder
	CAdvisorInterface       cadvisor.Interface
	Cloud                   cloudprovider.Interface
	ContainerManager        cm.ContainerManager
	DockerClient            dockertools.DockerInterface
	EventClient             *clientset.Clientset
	Hostname                string
	HostNetworkSources      []string
	HostPIDSources          []string
	HostIPCSources          []string
	KubeClient              *clientset.Clientset
	Mounter                 mount.Interface
	NetworkPlugins          []network.NetworkPlugin
	NodeName                string
	OOMAdjuster             *oom.OOMAdjuster
	OSInterface             kubecontainer.OSInterface
	PodConfig               *config.PodConfig
	Recorder                record.EventRecorder
	Reservation             kubetypes.Reservation
	TLSOptions              *server.TLSOptions
	Writer                  kubeio.Writer
	VolumePlugins           []volume.VolumePlugin
	EvictionConfig          eviction.Config
	ContainerRuntimeOptions []kubecontainer.Option
	Options                 []Option
}
```

The patterns I've seen so far with respect to eliminating `KubeletConfig` fields may be of some help:
- Some fields could just be eliminated, because they were either the same on `KubeletConfiguration` or just a typecast away from being the same. 
- Some fields from `KubeletConfiguration` just ended up in substructures of `KubeletConfig`; it was easy to just remove those substructure fields from `KubeletConfig` and construct them using local vars in `NewMainKubelet` instead. 
- Some fields, e.g. `Runonce`, were able to move into the `KubeletConfiguration`.


**P.S.** Part of the way I'm making the transition is by adding an extra `KubeletConfiguration` argument to functions that originally took a `KubeletConfig`, and field-by-field, switching those functions over to using information from the `KubeletConfiguration`. Once the `KubeletConfig` is gone, I'll remove the `KubeletConfig` argument, and the transition will be complete.

**Final note:**
Please try to keep in mind that this is not a general Kubelet cleanup effort, it is just me cleaning things up that are directly in the path of what I'm trying to do. Let's keep this focused on cleanup related to the path that config takes on it's way to the Kubelet.


**Release note**:
<!--  Steps to write your release note:
1. Use the release-note-* labels to set the release note state (if you have access) 
2. Enter your extended release note in the below block; leaving it blank means using the PR title as the release note. If no release note is required, just write `NONE`. 
-->
```
Removed Flags
- Removes the --auth-path flag. This has been deprecated in favor of --kubeconfig for two releases.
```

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Use deleteTimestamp in federated ns e2e tests

Fixes: #31317

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Update sj on UpdateStatus return value

Fixes #30542, #30549

cc @erictune

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Keep vendor/ and Godep/ when creating the staging client, add a readme

In copy.sh, instead of removing the vendor/, moving it to _vendor. vendor/ is needed when we publish the staging client to its own repository.

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Fixed integer overflow bug in rate limiter.

```release-note
Fix overflow issue in controller-manager rate limiter
```

This PR fixes a bug in the delayed work-queue used by some controllers.
The integer overflow bug would previously cause hotlooping behavior after a few failures 
as `time.Duration(..)` on values larger than MaxInt64 behaves unpredictably, and 
after a certain value returns 0 always.

cc @bprashanth @pwittrock

It has been deprecated for two releases (1.2 and 1.3).

This refactor removes the legacy KubeletConfig object and adds a new
KubeletDeps object, which contains injected runtime objects and
separates them from static config. It also reduces NewMainKubelet to two
arguments: a KubeletConfiguration and a KubeletDeps.

Some mesos and kubemark code was affected by this change, and has been
modified accordingly.

And a few final notes:

KubeletDeps:
KubeletDeps will be a temporary bin for things we might consider
"injected dependencies", until we have a better dependency injection
story for the Kubelet. We will have to discuss this eventually.

RunOnce:
We will likely not pull new KubeletConfiguration from the API server
when in runonce mode, so it doesn't make sense to make this something
that can be configured centrally. We will leave it as a flag-only option
for now. Additionally, it is increasingly looking like nobody actually uses the
Kubelet's runonce mode anymore, so it may be a candidate for deprecation
and removal.

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Avoid unnecessary copies & allocations in field selectors

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Bump cluster autoscaler to 0.3.0-beta3

cc: @piosz @fgrzadkowski @jszczepkowski

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add quota test for creating update requests

Adding a kube test for https://github.com/kubernetes/kubernetes/pull/30907 as requested in https://github.com/kubernetes/kubernetes/pull/30907#issuecomment-241139913 .