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Add coreos and gci images to the node benchmark job

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Added Changelog to addon manager

From #35651.

It would be good to have this changelog recording who and when pushed a new image to gcr.io. I retrieved the information from the [commit history](https://github.com/kubernetes/kubernetes/commits/master/cluster/addons/addon-manager).

@mikedanese

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Proposal for implementing nominal services AKA StatefulSets AKA The-Proposal-Formerly-Known-As-PetSets

This is the draft proposal for #260.

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Add hack/verify-test-owners.sh to ensure tests always have owners.

This ensures that new tests or changed tests are assigned appropriate owners.

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Fixes PR #35652

This is breaking the build. Fixes #35564

/cc @vishh @sjenning

Fixes PR #35652

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Swap in tests ownership

To make the test ownership more closer to actual area of expertise I made the following swap. I included @mtaufen to close the cycle. Please wait with applying lgtm label for the second reviewer.

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kubeadm: fixed small typo in alpha warning

Small typo in the alpha warning that I noticed and fixed.

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Remove reference from addon-manager dockerfile

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**What this PR does / why we need it**: Removes a reference to nonexisting file in the dockerfile for the addon-manager


This file was deleted with #34513

cc @mikedanese @MrHohn

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Update GCI mounter script to run in a rkt container

Depends on #35652

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Restore etcd from backup

The new script performs disaster recovery of etcd from backup.

https://github.com/kubernetes/kubernetes/issues/20504

@alex-mohr @lavalamp @kubernetes/goog-gke

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Fixes for golint tip

golint as of
https://github.com/golang/lint/blob/3390df4df2787994aea98de825b964ac7944b817/lint.go#L1440-L1442
requires that any function that has a context.Context argument have said
argument in the first position. This commit fixes the one function we had where
it wasn't.

cc @timothysc @wojtek-t @smarterclayton @jessfraz @kubernetes/rh-cluster-infra @liggitt @sttts @deads2k @eparis

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kubeadm: Stop assuming full ownership of /etc/kubernetes.

Packages may auto-create directories in /etc/kubernetes, and users also
need files such as cloud-config.json to be present and preserved at
their default locations in /etc/kubernetes. As such this modifies
pre-flight checks to only require the absence of the files and
directories we explicitly create in kubeadm.

Reset is similarly modified to not wipe out /etc/kubernetes entirely.
When resetting directories we also now preserve the directory itself,
but delete it's contents.

Also adds tests for reset command logic specifically for /etc/kubernetes
cleanup, to ensure user files are not inadvertently wiped out.

unrevert genrule for bindata

Bump container-vm version in config-test.sh

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Cadvisor root path configuration

This solves #33444 and reverts PR #33520.  This takes the root directory and passes it to cadvisor, which sets up the "nodefs" based on the provided path, rather than using "/" as before.

This PR is pending on changes in cadvisor, and will not pass tests until those changes are merged, and cadvisor godeps are updated.

```release-note
kubelet summary rootfs now refers to the filesystem that contains the Kubelet RootDirectory (var/lib/kubelet) instead of cadvisor's rootfs ( / ), since they may be different filesystems.
```

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

So we can qualify the new container-vm image against our full set of
active tests.

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

Removing datagen.go as it has been removed from godeps

golint as of
https://github.com/golang/lint/blob/3390df4df2787994aea98de825b964ac7944b817/lint.go#L1440-L1442
requires that any function that has a context.Context argument have said
argument in the first position. This commit fixes the one function we had where
it wasn't.

Regerated godeps licenses.

kubelet calls GetDirFsInfo(root directory) instead of using GetFsInfo(root label). Reverted #33520, and changed e2e test context to use nodefs

Hopefully fix verify-godeps.

This will allow packages to maintain ownership of config and data
directories, which may carry selinux or other attributes that should be
preserved, but we do not wish to manage within kubeadm itself.

Packages may auto-create directories in /etc/kubernetes, and users also
need files such as cloud-config.json to be present and preserved at
their default locations in /etc/kubernetes. As such this modifies
pre-flight checks to only require the absence of the files and
directories we explicitly create in kubeadm.

Reset is similarly modified to not wipe out /etc/kubernetes entirely.
When resetting directories we also now preserve the directory itself,
but delete it's contents.

Also adds tests for reset command logic specifically for /etc/kubernetes
cleanup, to ensure user files are not inadvertently wiped out.

Automatic merge from submit-queue

remove the non-generated client

Removes the non-generated client from kube.  The package has a few methods left, but nothing that needs updating when adding new groups.

@ingvagabund

Automatic merge from submit-queue

Remove outdated parts of density test

Removed functionality is handled by RunRC in other way. Events were a proxy for checking if Pods are running. They're not needed anymore (for good few releases;)

cc @timothysc