Fixing heapster memory requirements.

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Add kubernetes.tar.gz to .gitignore

This patch avoids adding kubernetes.tar.gz to git staging as it gets downloaded during get-kube.sh script.

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remove ConfigMap example from GC proposal

We need more thoughts on the design. Remove it to avoid causing confusion.

@derekwaynecarr  @lavalamp 

Move PD tests to flaky suite.

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Proposal: persistent volume selector

Partially replaces #17056.  Another proposal will follow dealing with dynamic provisioning on top of storage classes.

@kubernetes/sig-storage

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Don't dump everything in kubemarks

Don't dump all events etc. in kubemark failures, those are useless anyway with that amount of data.

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Fix panic in auth test failure

I got a spurious failure in the webhook integration test, but couldn't see the error returned because a panic was hit that assumed a body was always returned with the response

Revert "Revert "Add support for running GCI on the GCE cloud provider""

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Seccomp Proposal

WIP proposal to address #20870 

@kubernetes/kube-api 
@kubernetes/sig-node

<!-- Reviewable:start -->
---
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Handle federated service name lookups in kube-dns.

For the domain name queries that fail to match any records in the local
kube-dns cache, we check if the queried name matches the federation
pattern. If it does, we send a CNAME response to the federated name.

For more details look at the comments in the code.

Tests are coming ...

Also, this PR is based on @ArtfulCoder's PR #23930. So please review only the last commit here.

PTAL @ArtfulCoder @thockin @quinton-hoole @nikhiljindal 

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Fix govet error in reflect_resync test

Fix reflector test

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Add few log lines to NodeController

This reverts commit 40f53b17.

cache: fix flaky resync test

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Rolling updater should allow progress to be logged / detected

Also, use the cluster zone information while generating the CNAME
response for federation queries.

For the domain name queries that fail to match any records in the local
kube-dns cache, we check if the queried name matches the federation
pattern. If it does, we send a CNAME response to the federated name.

For more details look at the comments in the code.

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Support sort-by timestamp in kubectl get

## Pull Request Guidelines

1. Please read our [contributor guidelines](https://github.com/kubernetes/kubernetes/blob/master/CONTRIBUTING.md).
1. See our [developer guide](https://github.com/kubernetes/kubernetes/blob/master/docs/devel/development.md).
1. Follow the instructions for [labeling and writing a release note for this PR](https://github.com/kubernetes/kubernetes/blob/master/docs/devel/pull-requests.md#release-notes) in the block below.

```release-note
```

**Before:**
```console
$ kubectl get svc --sort-by='{.metadata.creationTimestamp}'
proto: no encoder for TypeMeta unversioned.TypeMeta [GetProperties]
proto: tag has too few fields: "-"
proto: no coders for struct *reflect.rtype
proto: no encoder for sec int64 [GetProperties]
proto: no encoder for nsec int32 [GetProperties]
proto: no encoder for loc *time.Location [GetProperties]
proto: no encoder for Time time.Time [GetProperties]
proto: no coders for intstr.Type
proto: no encoder for Type intstr.Type [GetProperties]
F0513 16:46:49.499894   29562 sorting_printer.go:182] Field {.metadata.creationTimestamp} in TypeMeta:<kind:"Service" apiVersion:"v1" > metadata:<name:"kubernetes" generateName:"" namespace:"default" selfLink:"/api/v1/namespaces/default/services/kubernetes" uid:"b88b4739-1964-11e6-9ac3-64510658e388" resourceVersion:"8" generation:0 creationTimestamp:<2016-05-13T16:45:06-07:00> labels:<key:"component" value:"apiserver" > labels:<key:"provider" value:"kubernetes" > > spec:<ports:<name:"https" protocol:"TCP" port:443 targetPort:<type:0 intVal:443 strVal:"" > nodePort:0 > clusterIP:"10.0.0.1" type:"ClusterIP" sessionAffinity:"ClientIP" loadBalancerIP:"" > status:<loadBalancer:<> >  is an unsortable type: struct, err: unsortable type: struct
```

**After:**
```console
$ kubectl get svc --sort-by='{.metadata.creationTimestamp}'
NAME         CLUSTER-IP   EXTERNAL-IP   PORT(S)   AGE
kubernetes   10.0.0.1     <none>        443/TCP   48s
frontend     10.0.0.108   <none>        80/TCP    10s
```
@kubernetes/kubectl 

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cache: reflector should never stop watching

A recent change tries to separate resync and relist. The motivation
was to avoid triggering relist when a resync is required.

However, the change is not effective since it stops the watcher. As hongchao
mentioned in the original comment, today's storage interface will not deliever
any progress notification to the watch chan. So any watcher that does not receive
events for the last few seconds will not be able to catch up from the previous
index after a hard close since the index of the last received event is out of
the cache window inside etcd2.

This pull request tries to fix this issue by not stoping watcher when a resync is
required.

/cc @hongchaodeng @wojtek-t @timothysc @rrati @smarterclayton 

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vSphere Volume Plugin Implementation

This PR implements vSphere Volume plugin support in Kubernetes (ref. issue #23932).

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A optimization for “RegisterCustomFitPredicate” function, avoiding redundancy

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Lower ginkgo parallelism and move same image rolling-update test out of flaky

Tentative fix for #25140.

A recent change tries to separate resync and relist. The motivation
was to avoid triggering relist when a resync is required.

However, the change is not effective since it stops the watcher. As hongchao
mentioned in the original comment, today's storage interface will not deliever
any progress notification to the watch chan. So any watcher that does not receive
events for the last few seconds will not be able to catch up from the previous
index after a hard close since the index of the last received event is out of
the cache window inside etcd2.

This pull request tries to fix this issue by not stoping watcher when a resync is
required.

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Add a basic e2e test for 3rd party objects.

Depends on https://github.com/kubernetes/kubernetes/pull/25365

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SplitHostPort is needed since Request.RemoteAddr has the host:port format

@smarterclayton ptal
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ResourceQuota controller uses rate limiter to prevent hot-loops in error situations

Have resource quota controller use a rate limited queue to prevent hot-looping in error situations.

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Use Metrics API in HPA