I try to upgrade a node in a demo-cluster:
root@cluster3-worker2:~# sudo kubeadm upgrade node
couldn't create a Kubernetes client from file "/etc/kubernetes/kubelet.conf": failed to load admin kubeconfig: open /etc/kubernetes/kubelet.conf: no such file or directory
To see the stack trace of this error execute with --v=5 or higher
Option --v=5
did not reveal new information.
Any clue what could be help here?
I am following this guide: Upgrade Worker Node