Automatic merge from submit-queue
Ubuntu: Enable ssh compression when downloading binaries during cluster creation
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resolves#20971 by using the options provided by ssh.
Native ssh compression has existed for years, and the server is free to disregard the setting, so this should be safe.
With things like the kube binaries I see about a 2x speed increase.
```
λ time scp kubes-bin.tar 9.30.182.251:/mnt/build/kubin
kubes-bin.tar 100% 344MB 10.7MB/s 00:32
real 0m32.284s
user 0m1.679s
sys 0m1.263s
λ time scp -C kubes-bin.tar 9.30.182.251:/mnt/build/kubin
kubes-bin.tar 100% 344MB 22.9MB/s 00:15
real 0m14.810s
user 0m12.858s
sys 0m0.994s
λ ls -lah kubes-bin.tar
-rw-r--r-- 1 mhb staff 344M Jun 2 15:29 kubes-bin.tar
λ tar -tf kubes-bin.tar
kubectl
master/
master/etcd
master/etcdctl
master/flanneld
master/kube-apiserver
master/kube-controller-manager
master/kube-scheduler
node/
node/flanneld
node/kube-proxy
node/kubelet
```
Automatic merge from submit-queue
[fix] allow ALLOW_PRIVILEGED to be passed to kubelet and kube-api
This is something that we need for running docker in docker. Please let me know if you would consider this change. Thanks :)
The kube DNS app recently gained support for federation (whatever that
is), including a new Salt parameter. It also gained alternate
templates, intended to be friendly to `sed`. Fortunately, those do
not demand a federation parameter.
There are actually two `roles` setting in ubuntu installation scripts.
One is roles as string, which can be set as env and then used in scripts.
The other is roles as array, which is used by internal handling to
locate specific role by offset.
This patch tries to distinguish roles meaning by declearing the second
as roles_array, thus eliminating its ambiguity.
Configurations in config-default.sh should take default values if they
are set outside of the script. `roles` option is an exception. This
patch fix it to maintain consistency behavior with other options.
This is good because it removes an obstacle to using the
cluster/ubuntu scripting to install Kubernetes into a restricted
environment where the machines can not open connections to arbitrary
external locations.
Also add debuggability to make-ca-cert.sh
Resolves#21037Resolves#21092
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