Add cloud provider config to kubeadm deployments

[woopstar]

Add cloud provider to kubeadm deployments.

According to kubernetes/kubeadm#1018 (comment) the cloud provider config should be in the extra args of each control plane.

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[woopstar]

ci check this

[riverzhang]

@woopstar kubelet_kubeadm.env, Also need to configure cloud_provider.

[riverzhang]

Both apiserver and controllerManager need to mount cloud_config？

[woopstar]

Both apiserver and controllerManager need to mount cloud_config？

They do ?

[riverzhang]

I think need to do that, They are 2 containers. I don't know how to supports it by kubeadm.

[neith00]

The deployment itself goes well.
On the opposite, I get tons of errors regarding TLS Handshakes when the liveness probe on the apiserver container is called. As a consequence, the apiserver keeps beeing restarted by the kubelet.
I tried using plain http on the probe and everything is going back to normal.
In fact I don't know if we must use HTTP or HTTPS for this probe. Let met all know what you think.
I tried to add the ca.crt to the system ca's but the probe keeps failing.

[riverzhang]

/hold