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Disable coreos nodes from node e2e due to issues with ssh on coreos.

Fixes #24423

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more explicit requirements for pre-commit hook

I don't know if using the pre-commit hook is still a best-practice, but godep and etcd are requirements for it to succeed.

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Refactored SeedProvider and Updated Docker

This is a redo of the last PR that I munged 😄 

- fixed maven build folder structure
- updated build to C* 3.4
- refactored Seed Provider - improved error handling, updated default SeedProvider code
- added start of unit tests.  Not as comprehensive as I would like
- updated docker image to debian:jessie
- installed openjdk 8
- added some docker fu to make the image smaller
- updated docker to C* 3.4 and update yaml
- updated README content.  Added a section about the docker, and the SeedProvider

Have not had a chance to test the docker on k8s, because I do not have a local docker repo.

NOTE: someone needs to push the docker image into the google repo. Not sure what the process is ...  I will submit another PR request with changes to the yaml files.

Signed-off-by: Vishnu kannan <vishnuk@google.com>

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[Networking] [E2E]  n-to-1 iperf client->server throughput benchmarking 

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Port-forward: use out and error streams instead of glog

Switches use of glog with command out and error streams

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Provide flags to use etcd3 backed storage

ref: #24405

What's in this PR?
- Add a new flag "storage-backend" to choose "etcd2" or "etcd3". By default (i.e. empty), it's "etcd2".
- Take out etcd config code into a standalone package and let it create etcd2 or etcd3 storage backend given user input.

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Support Close() in streaming decoder

[This would be useful for changes in clients to support protobufs.]

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Make all defaulters public

Will allow for generating direct accessors in conversion code instead of using reflection.

@wojtek-t

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Fix zone in kubemark-100

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Promote Pod Hostname & Subdomain to fields (were annotations)

Deprecating the podHostName, subdomain and PodHostnames annotations and created corresponding new fields for them on PodSpec and Endpoints types.

Annotation doc: #22564
Annotation code: #20688

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Create OWNERS for jenkins data

Assigne jenkins changes to more precise owners.

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Slightly more effective conversion test (better variety)

Exercises more code paths for debugging memory allocations.

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Add godoc for some kubelet funcs

Chipping away at that old boulder

@kubernetes/sig-node

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Move kubemark-100 to us-central

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Fix test-history. RE objects aren't callable.

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Validate deletion timestamp doesn't change on update

Fixes https://github.com/kubernetes/kubernetes/issues/24828

Refactored KubernetesSeedProvider and added unit tests.  Updated Docker image and bumped Cassandra version

Preparing to generate direct defaulter access.

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Add utility for determining qos of a pod

@vishh - per slack chat.

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Add kubemark-100 for testing out new performance measurements

cc @spxtr 

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Cleans up line wrap at 80 cols and some minor editing issues 

Address line wrap issue #1488.  Also cleans up other minor editing issues in the docs/design/* tree such as spelling errors. 
Signed-off-by: mikebrow <brownwm@us.ibm.com>

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fully qualify admission resources and kinds

Fully qualifies the `Kind` and `Resource` fields for admission attributes.  The information was getting filtered at the `RESTHandler` before.

@derekwaynecarr

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Update Docker version after cockpit installation

Fixes https://github.com/kubernetes/kubernetes/issues/24530
The vagrant setup didn't worked for me because `cockpit cockpit-kubernetes` brings their own Docker version (1.7) which doesn't work and the master components doesn't come up. More information about this bug are in my [issue](https://github.com/kubernetes/kubernetes/issues/24530).

My test system:

```bash
$ uname -a                        
Darwin MyMacBook.local 15.4.0 Darwin Kernel Version 15.4.0: Fri Feb 26 22:08:05 PST 2016; root:xnu-3248.40.184~3/RELEASE_X86_64 x86_64

$ vagrant --version                                                                                                                                                             
Vagrant 1.8.1

$ VBoxManage --version                                                                                                                                                          
5.0.16r105871
```

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Update configmap design doc

1. Update ConfigMapSelector -> ConfigMapKeySelector
2. Update apiVersion to v1
3. Fix error validating data: expected type array, for field spec.containers[0].command, got string; if you choose to ignore these errors, turn validation off with --validate=false 

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refactor conformance test

@Random-Liu  Rebase the testing code.
Signed-off-by: liang chenye <liangchenye@huawei.com>

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Store node information in NodeInfo

This is significantly improving scheduler throughput.

On 1000-node cluster:
- empty cluster: ~70pods/s
- full cluster: ~45pods/s
Drop in throughput is mostly related to priority functions, which I will be looking into next (I already have some PR #24095, but we need for more things before).

This is roughly ~40% increase.
However, we still need better understanding of predicate function, because in my opinion it should be even faster as it is now. I'm going to look into it next week.

@gmarek @hongchaodeng @xiang90 

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Uncomment the code that caused by #19254

Fix https://github.com/kubernetes/kubernetes/issues/24546.

@lavalamp