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Update basic example in client docs

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Fix downward api for pod using host network.

Fixes #24576

@yujuhong @yifan-gu 
I still can't find a cleaner way to fix this, so send this for discussion.

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Updated e2e tests for cluster autoscaling.

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Updated e2e tests for cluster autoscaling to work with the new cluster autoscaler.

Updated e2e tests for cluster autoscaling to work with the new cluster autoscaler.

Tune traces thresholds in etcdHelper

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Improve fatal error description in plugins.go of scheduler

The PR add more information for the fatal error in plugins.go of scheduler.

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Verify that openssl is installed in local-up-cluster.sh

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AWS kube-down: don't fail if ELB not in VPC - #23784

Prevent python undefined key error.

```
Traceback (most recent call last):
  File "<string>", line 1, in <module>
KeyError: 'VPCId'
```

Fixes #23784

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Adding patch and cleaning up namespace code

cc @kubernetes/sig-api-machinery 

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Introduce namespaces in load test

Ref #25563

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add index template for es aggregations

This index template helps us to do es aggregations of namespace_name, pod_name and container_name. Then after doing eggs, we will get the whole name not all the spilt pieces.  
fix #25127  

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Fixed 'Invalid endpoint: https://ec2.us-east-.amazonaws.com'. #24420 #24420

Addresses:

- https://github.com/kubernetes/kubernetes/issues/24020

- https://github.com/kubernetes/kubernetes/issues/24420

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Add nfs support for vagrant nodes.

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This will allow to use NFS volumes on those nodes

The PR add more information to fatal error in plugins.go of scheduler.

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Salt configuration for the new Cluster Autoscaler for GCE

Adds support for cloud autoscaler from contrib/cloud-autoscaler in kube-up.sh GCE script.

cc: @fgrzadkowski @piosz 

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Build hyperkube in hack/local-up-cluster instead of separate binaries

This speeds up the build time a lot. 
Also add arm64 as a valid arch

This is quite trivial. Let's get it in asap
@thockin @pmorie @liggitt @eparis @zmerlynn @smarterclayton 

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Use --format='value(name)' with gcloud instead of grep/awk/cut

Fixing our fragile parsing of `gcloud` is getting old (#24746, #25159, maybe others?).

Instead, let's just get the proper output out of `gcloud` in the first place.

Speed up hack/local-up-cluster.sh by building hyperkube instead of separate binaries. Also add arm64 as a valid arch

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enable recursive processing in kubectl rollout

This PR was split out of https://github.com/kubernetes/kubernetes/pull/23673 per @deads2k's suggestion: https://github.com/kubernetes/kubernetes/pull/23673#discussion-diff-61290415

It makes use of the recursive processing of a directory in `kubectl rollout {undo,pause,resume}` which now also conforms to the [command conventions](https://github.com/kubernetes/kubernetes/blob/master/docs/devel/kubectl-conventions.md#command-implementation-conventions).

`kubectl rollout history` is being omitted for the time being as its encountering what appears to be an anomaly of an issue: https://github.com/kubernetes/kubernetes/issues/24606. Once this issue has been resolved I will modify it to be recursive

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add GCE PD volume e2e tests

add GCE PD e2e volume test

@kubernetes/sig-storage 

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Conversions have kube-isms and are not portable for downstream

Some minor fixes to enable generators for OpenShift and others who need
to generate conversions on Kube API groups outside the core.

@deads2k

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Support struct,array,slice types when sorting kubectl output

Fixes https://github.com/kubernetes/kubernetes/issues/24328.

Briefly, `sorting_printer` only take cares of the following type kinds:

*   `reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64`
*   `reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64`
*   `reflect.Float32, reflect.Float64`
*   `reflect.String`
*   `reflect.Ptr`

This commit aims to add `reflect.Struct, reflect.Slice, reflect.Array`.

/cc @bgrant0607 

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validate third party resources

addresses validation portion of https://github.com/kubernetes/kubernetes/issues/22768

* ThirdPartyResource: validates name (3 segment DNS subdomain) and version names (single segment DNS label)
* ThirdPartyResourceData: validates objectmeta (name is validated as a DNS label)
* removes ability to use GenerateName with thirdpartyresources (kind and api group should not be randomized, in my opinion)

test improvements:
* updates resttest to clean up after create tests (so the same valid object can be used)
* updates resttest to take a name generator (in case "foo1" isn't a valid name for the object under test)

action required for alpha thirdpartyresource users:
* existing thirdpartyresource objects that do not match these validation rules will need to be removed/updated (after removing thirdpartyresourcedata objects stored under the disallowed versions, kind, or group names)
* existing thirdpartyresourcedata objects that do not match the name validation rule will not be able to be updated, but can be removed

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Remove RunInContainer interface in Kubelet Runtime interface

According to #24689, we should merge RunInContainer and ExecInContainer in the container runtime interface. 

@yujuhong  @kubernetes/sig-node 

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Optimize group version allocations

Avoid allocation in strings.Split() for most common cases.

Extracted from #24845

@wojtek-t or @deads2k

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Make IsQualifiedName return error strings

Part of the larger validation PR, broken out for easier review and merge.

@lavalamp FYI, but I know you're swamped, too.

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Horizontal autoscalaer tolerance breaching verifier

@piosz @jszczepkowski This is the original HPA test without the other modifications, it makes explicit the mathematics of the logic in case changes ever occur.

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etcd_watcher: make Deleted Event.Object's version consistent

### What's the problem?

In [sendDelete()](https://github.com/kubernetes/kubernetes/blob/995f022808d1407897a5b23373484ac683534390/pkg/storage/etcd/etcd_watcher.go#L437-L442), Deleted Event.Object's resource version will be set to the latest resource version. This is actually an assumption made by cacher that all later events should have objects with larger verions; See [here](https://github.com/kubernetes/kubernetes/blob/995f022808d1407897a5b23373484ac683534390/pkg/storage/cacher.go#L579-L581).

In sendModify(), it could also return Deleted event. However, the resource version is still the old version, which is inconsistent behavior with sendDelete().

### What's this PR?
This PR sets the version of oldObj in sendModify() to be the latest version.
Provided unit test for it.

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rkt: Refactor GarbageCollect to enforce GCPolicy.

Previously, we uses `rkt gc` to garbage collect dead pods, which is very coarse, and can cause the dead pods to be removed too aggressively. 

This PR improves the garbage collection, now after one GC iteration:
- The deleted pods will be removed.
- If the number of containers exceeds gcPolicy.MaxContainers,
  then containers whose ages are older than gcPolicy.minAge will be removed.

cc @kubernetes/sig-node @euank @sjpotter 

Pending on #23887 for the Godep updates.

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Refactor downward API volume to use AtomicWriter

Make the downward API plugin use `AtomicWriter` instead.

@thockin @saad-ali @sdminonne

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Add pod status/ready/restartCount conformance test

add more test cases to cover containers which will be terminated/running/failed/pending.
Signed-off-by: liang chenye <liangchenye@huawei.com>

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fix expose multi protocols issue

Please refer #23882 for more detail. @bprashanth @bgrant0607 ptal.

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