1.3.9. Separate a node without reinstalling

Stop the corosync and pve-cluster services:

Firstly, stop all the cluster services.

$ systemctl stop pve-cluster
$ systemctl stop corosync

Reset PMXCFS (Proxmox Cluster File System) Status

  • Start the cluster filesystem in local mode:

$ pmxcfs -l
  • Delete the corosync config files

$ rm /etc/pve/corosync.conf
$ rm /etc/corosync/*
  • Start the filesystem as a normal service

$ killall pmxcfs
$ systemctl start pve-cluster

Remove Cluster Configuration Files

After killing all PMXCFS processes you must remove any remaining cluster config files for a proper re-join.

$ rm /var/lib/corosync/*
$ rm -r /etc/pve/nodes/NAMEOFPEERNODES

Note

You might want to remove the respective SSH Keys in the authorized_key file from the old nodes too.

$ pvecm add [target-ip(ring0address)]

source: https://pve.proxmox.com/pve-docs/pvecm-plain.html