is it possible to re-add a master node (etcd/contr...
# rke2h
hundreds-evening-84071
07/14/2025, 7:45 PMis it possible to re-add a master node (etcd/control plane roles only) after deletion
• so remove the node in rancher
• run rke2-uninstall.sh
• reboot
• run the registration url from rancher ui
so hostname and IP will remain same - but all data on the node will be removed
oh - this cluster does have 3 nodes with etcd/control plane roles
and 3 nodes with worker role
c
creamy-pencil-82913
07/14/2025, 7:52 PMyes, as long as the node is removed from the cluster and the db cleaned up.
h
hundreds-evening-84071
07/14/2025, 7:54 PMkubectl does not show that node any more
rancher UI does not show that node any more
I have run rke2-uninstall
make sure these dirs are empty
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/var/lib/rancher/
/var/lib/kubelet/
/etc/rancher/hundreds-evening-84071
07/14/2025, 7:54 PMhow can I check confirm the db ?
hundreds-evening-84071
07/14/2025, 7:58 PMthis does not show that node any more
kubectl -n kube-system get pod -l component=etcd --no-headers -o custom-columns=NAME:.metadata.namehundreds-evening-84071
07/14/2025, 8:00 PMactually this doc helped ...
https://www.suse.com/support/kb/doc/?id=000021653
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/var/lib/rancher/rke2/bin/crictl exec $etcdcontainer etcdctl --cert /var/lib/rancher/rke2/server/tls/etcd/server-client.crt --key /var/lib/rancher/rke2/server/tls/etcd/server-client.key --cacert /var/lib/rancher/rke2/server/tls/etcd/server-ca.crt endpoint health --cluster --write-out=table Copy code
/var/lib/rancher/rke2/bin/crictl exec $etcdcontainer etcdctl --cert /var/lib/rancher/rke2/server/tls/etcd/server-client.crt --key /var/lib/rancher/rke2/server/tls/etcd/server-client.key --cacert /var/lib/rancher/rke2/server/tls/etcd/server-ca.crt endpoint status --cluster --write-out=tablec
creamy-pencil-82913
07/14/2025, 8:18 PMshould be good then…
h
hundreds-evening-84071
07/14/2025, 8:19 PMthank you!