Use of NETWORK_PROVIDER=cni is documented as useable (as well as it's affects on the runtime args of kubelet),
however the actual implimentation in the salt automation doesnt seem to exist.
this change attempts to fix that for the vagrant usecase.

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Add zsh completion for kubectl

This is based on the zsh emulation of the bash completion system (compare `bashcompinit` at http://zsh.sourceforge.net/Doc/Release/Completion-System.html). Because this emulation is not 100% complete, a number of functions are added or extended to work with the bash completion of kubectl.

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Kubelet: Remove nsinit related code and bump up minimum docker apiversion

Docker has native exec support after 1.3.x. We never need this code now.

As for the apiversion, because Kubernetes supports 1.8.x - 1.10.x now, we should bump up the minimum docker apiversion.
@yujuhong I checked the [changes](https://github.com/docker/engine-api/blob/master/types/versions/v1p20/types.go), we are not relying on any of those changes. So #23506 should work with docker 1.8.x+

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use apply instead of create to setup namespaces and tokens in addon manager

when the addon manager restarts, it takes ~15 minutes (1000 seconds) to start the sync loop because it retries creation of namespace and tokens 100 times. Create fails if the tokens already exist. Just use apply.

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add an event for when a daemonset can't place a pod due to insufficen…

…t resource or port conflict

https://github.com/kubernetes/kubernetes/issues/23013#issuecomment-201076147

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AWS kube-up: Bump jessie image

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Move typed clients into clientset folder

Move typed clients from `pkg/client/typed/` to `pkg/client/clientset_generated/${clientset_name}/typed`.

The first commit changes the client-gen, the last commit updates the doc, other commits are just moving things around.

@lavalamp @krousey 

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stop creating secrets for dns, it uses the kube-system service account now

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relax restmapper resource matching

We were matching case insensitive on Kinds, not Resources, thus driving me insane.

@liggitt @caesarxuchao 

Fix the link for unlabeled issues in the build cop guide.

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add CoreKube to community resources

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Juju kube up

I found some problems with the kube-up script that this pull request addresses. We didn't have the kubectl binary in the correct location. 

Just changing where we download the package from the master, and fixing the kube-down.sh script to remove those files.

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genericapiserver: Moving InstallSwaggerAPI to Run

Ref https://github.com/kubernetes/kubernetes/pull/21190#discussion_r57494673

Moving InstallSwaggerAPI() from InstallAPIGroups() to Run(). This allows the use of InstallAPIGroups() multiple times or using InstallAPIGroup() directly.

cc @jianhuiz @kubernetes/sig-api-machinery 

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AWS kube-up: tolerate a lack of ephemeral volumes

Some users have requested the ability to _not_ use ephemeral volumes (local instance storage), but this also highlighted the fact that we likely fail to start on instance types with no instance storage (e.g. the c4 class instances).

Confirming this fix, and then going to confirm that e.g. c4 is broken.  If so this will be a cherry-pick candidate.

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add missing attributes to authorization interface

Plumb through missing attributes for authorization decisions.  The request parser picked them up a while back, but they were never wired up in kube.

This simply allows authorizers to use them, it doesn't require them to.

@kubernetes/kube-iam 

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Check claimRef UID when processing a recycled PV, take 2

Reorder code a bit so it doesn't allow a case where you get some error other than "not found"
combined with a non-nil Claim.

Add test case.

cc @kubernetes/rh-cluster-infra @kubernetes/rh-storage @liggitt 

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duplicate kube-apiserver to federated-apiserver

duplicate the kube-apiserver source code to ube-apiserver and update references
cluster specific api objects will be in separate PRs

#19313,  #21190
https://github.com/kubernetes/kubernetes/pull/21190#issuecomment-201551176
@nikhiljindal

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Kubelet: Start using the official docker engine-api

For #23563.

This is the **first step** in the roadmap of switching to docker [engine-api](https://github.com/docker/engine-api).
In this PR, I keep the old `DockerInterface` and implement it with the new engine-api.
With this approach, we could switch to engine-api with minimum change, so that we could:
* Test the engine-api without huge refactoring.
* Send following PRs to refactor functions in `DockerInterface` separately so as to avoid a huge change in one PR.

I've tested this PR locally, it passed all the node conformance test:
```
make test_e2e_node

Ran 19 of 19 Specs in 823.395 seconds
SUCCESS! -- 19 Passed | 0 Failed | 0 Pending | 0 Skipped PASS

Ginkgo ran 1 suite in 13m49.429979585s
Test Suite Passed
```
And it also passed the jenkins gce e2e test:
```
go run hack/e2e.go -test -v --test_args="--ginkgo.skip=\[Slow\]|\[Serial\]|\[Disruptive\]|\[Flaky\]|\[Feature:.+\]"

Ran 161 of 268 Specs in 4570.214 seconds
SUCCESS! -- 161 Passed | 0 Failed | 0 Pending | 107 Skipped PASS

Ginkgo ran 1 suite in 1h16m16.325934558s
Test Suite Passed
2016/03/25 15:12:42 e2e.go:196: Step 'Ginkgo tests' finished in 1h16m18.918754301s
```

I'm writing the design document, and will post the switching roadmap in an umbrella issue soon.

@kubernetes/sig-node 

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Switch from api.ObjectMetaFor to meta.Accessor in most of places

Fix #23278

@smarterclayton @lavalamp 

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minor edits to testing guide

Noted a few small issues going through the getting started testing guide.

Cheers, Mike
Signed-off-by: mikebrow <brownwm@us.ibm.com>

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Mark filename flags for completions

Adds filename bash completion to some flags that were missing.

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Use correct home directory on Windows

As of now the `kubectl` config mechanism that saves/loads `~/.kube/config` is broken on Windows, saving the config file in the *current* directory instead of the user's *home* dir. This happens because most Windows don't respect the `HOME` environment variable. 

This PR changes the config file loading mechanism to use the recommended way to detect the user home on Windows (`HOMEDRIVE`+`HOMEPATH` or `USERPROFILE`), and adds a migration for users that might be currently relying on existing config files.

We rename it to EPHEMERAL_BLOCK_DEVICE_MAPPINGS, and we also change the value
so that it starts with a `,`, instead of always inserting a comma before it.
In this way the value can be empty.

Also, if the user sets the (currently experimental) KUBE_AWS_STORAGE
environment variable to be "ebs", then we will not mount any instance storage
which will cause the machines to use EBS storage instead.

format-disks used to run with non-strict bash semantics, but this changed in
1.2 as we now merge it into the GCE script, so pipefail and errexit are both
set.

However, the way we list the ephemeral disks, by piping to grep, would cause an
exit code of 2 if there were no ephemeral disks.

Tolerate failure here by add `|| true`.  The metadata service call is unlikely
to fail, so we continue to ignore that possibility.

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Add release notes for v1.2.1 and cleanup/unify formatting/layout.

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Refactor streaming code to support interop testing

Refactor exec/attach/port forward client and server code to better
support interop testing of different client and server subprotocol
versions.

Fixes #16119

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Update vagrant developer guide for where logs are located

Fixes https://github.com/kubernetes/kubernetes/issues/21915

updating broken url

Signed-off-by: mikebrow <brownwm@us.ibm.com>

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Fix so setup-files don't recreate/invalidate certificates that already exist

Fixes: #23197 and a lot of other DNS and dashboard issues

This is quite critical for `docker`-based users and should be considered as a **cherrypick-candidate** as it makes a lot of people wonder why Dashboard and/or DNS doesn't work. Example: https://github.com/kubernetes/dashboard/issues/374

Earlier when you shut your `docker.md` cluster down and started it again, all ServiceAccounts became invalidated by `setup-files` that happily ran once again and replaced all files. That made `apiserver` and `controller-manager` pick up the new certs (or there was a race condition, they _could_ have picked up the old certs too, but that's unlikely) and the old certs were put into `/var/run/secrets` because the ServiceAccount's Secrets were stored in etcd, which `setup-files` didn't touch.

@fgrzadkowski @huggsboson @thockin @mikedanese @vishh @pwittrock @eparis @bgrant0607 

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node e2e retry gcr.io failures

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A pod never terminated if a container image registry was unavailable

Fixes https://github.com/kubernetes/kubernetes/issues/23742
Fixes https://github.com/kubernetes/kubernetes/issues/22045

Pods will now show proper status when this happens as well:

```
$ cluster/kubectl.sh get pods --all-namespaces 
NAMESPACE   NAME                   READY     STATUS                RESTARTS   AGE
test        foo-4072956304-1g8qs   0/1       RegistryUnavailable   0          7s
test        foo-4072956304-i045g   0/1       RegistryUnavailable   0          7s
test        foo-4072956304-qem2n   0/1       RegistryUnavailable   0          7s
```

Where as previously they would never report a reason.

I also removed the "temporary" part of the message because we have no idea if its temporary or permanent.

/cc @kubernetes/sig-node @kubernetes/rh-cluster-infra 

Slack URL is broken.

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Clarify labeling states on proposed cherrypicks.

Modernized the examples.

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update kubelet cluster-dns doc

refer #23320 for more detail. @thockin ptal.

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Add a TOC to CHANGELOG.md.