node stop & start on master fails: failed to load admin kubeconfig: open /root/.kube/config: no such file or directory

[lingsamuel]

Steps to reproduce the issue:

1. start a cluster
2. minikube node stop the master node
3. minikube node start it, failed:

❌  Exiting due to GUEST_NODE_START: generating join token: generating join command: /bin/bash -c "sudo env PATH=/var/lib/minikube/binaries/v1.19.3:$PATH kubeadm token create --print-join-command --ttl=0": Process exited with status 1
stdout:

stderr:
failed to load admin kubeconfig: open /root/.kube/config: no such file or directory

And try minikube node start again, got:

$ minikube node start minikube
✅  minikube is already running

To fix this, I have to use minikube stop && minikube start to restart the whole cluster.

[lingsamuel]

Because node start always set apiserver=false: _, err = node.Start(s, false)