Make DNS working on docker and docker-multinode

[luxas]

Update the DNS template from cluster/addons/dns and combine into one file.
Fixes: #19228 #18227

Related to: #21379 #21357

@fgrzadkowski

[k8s-github-robot]

Labelling this PR as size/L

[k8s-bot]

GCE e2e test build/test passed for commit 7e48c9eef51feba8ec4d9c8bb3dc56bcdbda0893.

• Build Log
• Test Artifacts
• Internal Jenkins Results

[k8s-github-robot]

The author of this PR is not in the whitelist for merge, can one of the admins add the 'ok-to-merge' label?

[fgrzadkowski]

Why is it that you don't need to set -s flag?

[luxas]

The default is -s flag is http://localhost:8080, and that's were apiserver will listen by default for docker-multinode (when running from the same node)
Anyway, it's overkill to specify a separate server option here (the user have to be able to kubectl get po for example)

One may use the -s flag if running kubectl from another node, or export KUBERNETES_MASTER for example. But the user should know that

[deftdawg]

The hypercube install of 1.2.0-alpha8 does not automatically create the kube-system name space (rather it has only "default"). SkyDNS should probably use default or indicate that manually creating the namespace "kubectl create namespace kube-system" will be needed to avoid getting "Error from server: error when creating "./skydns.yaml": namespaces "kube-system" not found"

[gopinatht]

@luxas @fgrzadkowski It would be great if we can get this merged before the next alpha or beta build. Is there anything I can help with?

[luxas]

@jumpkick I will probably include the creation of kube-system in #21646. Thanks

@gopinatht As soon as #21379 is merged (soon) I'll rebase and this may be LGTM'd, so it will probably be included in the next release.

[thockin]

Thanks for reviewing, Filip.

[k8s-github-robot]

PR needs rebase

[luxas]

@fgrzadkowski @thockin I copied https://github.com/kubernetes/kubernetes/blob/master/cluster/addons/dns/skydns-rc.yaml.in, bumped to etcd-amd64:2.2.1 and added the kube-system namespace.

Now the two skydns manifests are equal.
PTAL

[k8s-bot]

GCE e2e build/test failed for commit e9af6c3.

• Build Log
• Test Artifacts
• Internal Jenkins Results

Please reference the list of currently known flakes when examining this failure. If you request a re-test, you must reference the issue describing the flake.

[k8s-bot]

GCE e2e build/test failed for commit cd80bf8d659c618c4e5ee54edc04fa38d39865d8.

• Build Log
• Test Artifacts
• Internal Jenkins Results

Please reference the list of currently known flakes when examining this failure. If you request a re-test, you must reference the issue describing the flake.

[fgrzadkowski]

@k8s-bot test this; issue #IGNORE

[k8s-bot]

GCE e2e build/test passed for commit e9af6c3.

• Build Log
• Test Artifacts
• Internal Jenkins Results

[k8s-github-robot]

Automatic merge from submit-queue