Rancher managed RKE2 clusters stuck in "Waiting for probes: kube-controller-manager, kube-scheduler"

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Environment

Rancher <2.7.5

RKE2

Situation

Downstream RKE2 clusters in Rancher GUI stuck with status:

"Waiting for probes: kube-controller-manager, kube-scheduler"

Resolution

Stop the RKE2 server:

systemctl stop rke2-server

Remove the .crt and .key file in the respective tls directories:

rm /var/lib/rancher/rke2/server/tls/kube-controller-manager/kube-controller-manager.{crt,key}

and

rm /var/lib/rancher/rke2/server/tls/kube-scheduler/kube-scheduler.{crt,key}

Perform a certificate rotation:

rke2 certificate rotate

Restart RKE2 server:

systemctl start rke2-server

Cause

This issue should be fixed in 2.7.5 as per code changes the certificates that may result in cluster getting stuck on upgrade are now also rotated when using "Rotate Certificates" feature.

It's highly recommended to rotate certificates periodically (at least once a year) to ensure they do not expire.

Disclaimer

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