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Kubeadm: print information about certificates

Prints basic information about certificates to the user.

Example of `kubeadm init` output:
```
<master/pki> generated Certificate Authority key and certificate:
Issuer: CN=kubernetes | Subject: CN=kubernetes | CA: true
Not before: 2016-09-30 11:19:19 +0000 UTC Not After: 2026-09-28 11:19:19 +0000 UTC
Public: /etc/kubernetes/pki/ca-pub.pem
Private: /etc/kubernetes/pki/ca-key.pem
Cert: /etc/kubernetes/pki/ca.pem
<master/pki> generated API Server key and certificate:
Issuer: CN=kubernetes | Subject: CN=kube-apiserver | CA: false
Not before: 2016-09-30 11:19:19 +0000 UTC Not After: 2017-09-30 11:19:19 +0000 UTC
Alternate Names: [172.18.76.239 10.0.0.1 kubernetes kubernetes.default kubernetes.default.svc kubernetes.default.svc.cluster.local]
Public: /etc/kubernetes/pki/apiserver-pub.pem
Private: /etc/kubernetes/pki/apiserver-key.pem
Cert: /etc/kubernetes/pki/apiserver.pem
<master/pki> generated Service Account Signing keys:
Public: /etc/kubernetes/pki/sa-pub.pem
Private: /etc/kubernetes/pki/sa-key.pem
```

Example of `kubeadm join` command:
```
<node/csr> received signed certificate from the API server:
Issuer: CN=kubernetes | Subject: CN=system:node:minion | CA: false
Not before: 2016-09-30 11:28:00 +0000 UTC Not After: 2017-09-30 11:28:00 +0000 UTC
```

Fixes #33642
cc @kubernetes/sig-cluster-lifecycle

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pass loopback config to poststart hooks

Updates post start hooks to take a clientconfig with the new loopback credentials for bootstrapping.

@ericchiang This is a little bit of plumbing, but mainly auth I think.

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CRI: various spelling and typo fixes

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Add ECDSA support for service account tokens

Fixes #28180

```release-note
ECDSA keys can now be used for signing and verifying service account tokens.
```

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Add test cases to test the default value of HorizontalPodAutoscaler

Add test cases to test the default value of HorizontalPodAutoscaler.

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Run hack/update-codegen.sh in release-1.4 for generating an updated 1.4 clientset

@caesarxuchao doing steps 1 and 2 as described here https://github.com/kubernetes/kubernetes/pull/33851#issuecomment-250851272

adds apps, authentication, certificates, rbac, and storage.

The reason there are substantial deletions (aside from the oneliner "this package is generated by client-gen with arguments...") is because PR https://github.com/kubernetes/kubernetes/pull/32407 added a resource to the 1.4 clientset even though the resource is not present in 1.4 and the PR is targeted to 1.5. So this corrects that, as a bonus.

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Abstraction of endpoints in leaderelection code

**Problem Statement**:
Currently the Leader Election code is hard coded against the endpoints api.  This causes performance issues on large scale clusters due to incessant iptables refreshes, see: https://github.com/kubernetes/kubernetes/issues/26637 

The goal of this PR is to: 

- Abstract Endpoints out of the leader election code
- Fix a known bug in the event recording 

fixes #18386

**Special notes for your reviewer**:
This is a 1st pass at abstracting the details of endpoints out into an interface.  Any suggestions around how we we want to refactor this interface is welcome and could be addressed in either this PR or follow on PR. 

/cc @ncdc @wojtek-t @rrati

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Apply default image tags for all runtimes

Move the docker-specific logic up to the ImageManager to allow code sharing
among different implementations.

Part of #31459

/cc @kubernetes/sig-node

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switch node controller to shared informers

Switches the node controller to re-use existing watches and caches.

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Node-ip is not used when cloud provider is used

Currently --node-ip in kubelet is not being used when kubelet is configured with a cloud provider. With this fix, kubelet will get a list of IPs from the provider and parse it to return the one that matches node-ip.

This fixes #23568

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Bump glbc version to 0.8.0

Picks up k8s.io godeps for v1.4 thereby fixing an int overflow bug in the upstream delayed-workqueue pkg. Without this the controller spams logs with retries in the "soft error" case, which is easy to come by when users eg: create ingresses that point to non-exist services. 

Should go into 1.4.1, because 1.4.0 is pretty much out at this point. 
https://github.com/kubernetes/kubernetes/issues/33279

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allow kubectl -f to filter by selector

cc @kubernetes/kubectl

Fixes #32544

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fix kubeadm on AWS so that kube-controller has access to certs for am…

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**What this PR does / why we need it**: This fixes an issue with kubeadm not mounting ssl certs for kube-controller

**Which issue this PR fixes** : fixes #33680

**Special notes for your reviewer**:

**Release note**:
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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`. 
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```release-note
Fixes Kubeadm so kube-controller has certs for using amazon api
```

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OnlyLocal nodeports

90% unittests.
Code changes: 
* Jump to XLB from nodePorts for OnlyLocal nodeports
* Jump to services chain from XLB for clusterCIDR (partially fixes https://github.com/kubernetes/kubernetes/issues/33081)

NodePorts still don't get firewalls: https://github.com/kubernetes/kubernetes/issues/33586

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add optional env var for allowing version skew in test cmd

If you only make a change to a server component and then re-run `test-cmd` you get a skew error.  This is really annoying.  I've left the default as it was (force version match), but now also allow `ALLOW_SKEW=true hack/test-cmd.sh` to skip the check.

@eparis worth a quick bash check, but I think I got it.

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docs/proposals/volume-provisioning.md: fix typos

Fixes a couple of typos that I found during reading.

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Correct env var name in configure-helper

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Remove flannel because now everything here is upstreamed

Multiarch is now a thing for official flannel 👍 

@tomdee @mikedanese @errordeveloper

Remove flannel because now everything here is upstreamed; multiarch is a thing for official flannel now

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Use patched golang1.7.1 for cross-builds targeting darwin

This PR extends #32517 to use the patched go1.7.1 introduced by that PR to build all darwin targets (e.g. kubectl).

This is necessary because binaries built with earlier versions of Go regularly segfault on macOS Sierra (see #32999 and #33070).

This solution is somewhat hacky, but we intend to cherry-pick this to 1.4, and switching all of 1.4 to build with go1.7.1 is very high risk.

I haven't yet pushed the cross build image yet, so this will fail to build. Will test locally and update with results.

First step of fixing #33801.

cc @luxas @pwittrock @david-mcmahon @liggitt @smarterclayton @jfrazelle @Starefossen @gerred

The variable should be KUBEPROXY_TEST_ARGS, not KUBE_PROXY_TEST_ARGS.

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CRI: Add fake attach support in CRI.

For #31459.

I've tested in my cluster, it works.

@feiskyer @yujuhong

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Add community expectations about conduct and reviewing.

@sarahnovotny @smarterclayton @philips @thockin @davidopp @jbeda 

As discussed in the previous community meeting here's a description of the expectations around community, I expanded it a little bit beyond code review because it seemed like a good place to put it
down in one location.

Please let me know what I got wrong (or right ;)

Thanks
--brendan

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Proposal: Add HyperContainer runtime

This PR adds a proposal for integrating [HyperContainer](http://hypercontainer.io) runtime via CRI.

CC @dchen1107 @kubernetes/sig-node

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Extend logging for kubemark failures debugging

Ref https://github.com/kubernetes/kubernetes/issues/33723

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Copy objects in federation test helper

Push clean copies of passed objects in test helper in federation controllers tests.

Fixes: #33667

cc: @gmarek @quinton-hoole @kubernetes/sig-cluster-federation

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formatting json printer for runtime.Unknown

Formatting JSONPrinter.
It prints everything in one single line before.
Now it prints in well-formatted way.

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Add a script to "stop" GKE cluster creation

Fix #33749