- Don't always print to stdout that the kubelet is starting.
instead delegate this to the callers of TryStartKubelet.
- Add a new root kubeadm init phase called "kubelet-finalize"
- Add a sub-phase to "kubelet-finalize"
called "experimental-cert-rotation"
- "cert-rotation" performs the following actions:
- tries to guess if kubelet client cert rotation is enabled
- update the kubelet.conf to use the rotatable cert/key
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