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How to delete a cluster on Proxmox

Posted on:February 11, 2023

One of the key features of Proxmox VE is its ability to create and manage clusters of nodes, which can be used to provide high availability and scalability.

However, it’s important to note that a Proxmox VE cluster requires a minimum of three nodes in order to function properly. Without at least three nodes, you may not be able to log in to the Proxmox VE GUI and make changes.

If you find yourself in a situation where you need to remove a node from a Proxmox VE cluster, there are several steps that you can follow to ensure a smooth and successful removal process. Login to node using ssh and run following commands:

systemctl stop pve-cluster
systemctl stop corosync

pmxcfs -l

rm /etc/pve/corosync.conf
rm -r /etc/corosync/*

killall pmxcfs

systemctl start pve-cluster

Here’s an explanation for each step:

Once you’ve removed the cluster connection, you can then start a new connection on the same node.