Proxmox - Remove Node from cluster

Caution Read the procedure carefully before proceeding, as it may not be what you want or need.

Use the Proxmox VE Cluster Manager command to show the status of the cluster.

pvecm status

(Console/shell)

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Error: Corosync config '/etc/pve/corosync.conf' does not exist - is this node part of a cluster?

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Remove Node

pvecm nodes

(Console/shell)

Note the name of the node you want to remove

pvecm delnode (name of the node)

DELETE CLUSTER

Set Node to have a quorum of 1

pvecm expected 1

Stop the running cluster

systemctl stop pve-cluster

Force the cluster to run in local mode

pmxcfs -l

• turn off node you want to remove
• reboot the server

Delete all the cluster configuration files

rm -fv /etc/pve/cluster.conf \
       /etc/pve/corosync.conf 

rm -rfv /etc/pve/nodes/(name of the node)

rm -fv /etc/cluster/cluster.conf \
       /etc/corosync/corosync.conf 

rm -fv /var/lib/pve-cluster/.pmxcfs.lockfile

Start cluster

systemctl start pve-cluster

• Reboot and cluster should be gone

rm /etc/corosync/authkey