Remove node from proxmox cluster without having to do any reinstallation.

remove-node-from-cluster.sh

#!/bin/bash

echo "\n #####################"
echo "Remove node from Proxmox Cluster"
echo "This is the same commands that we have in the docs:"
echo "https://pve.proxmox.com/pve-docs/pve-admin-guide.html#pvecm_separate_node_without_reinstall \n"

systemctl stop pve-cluster
systemctl stop corosync

pmxcfs -l

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

killall pmxcfs
systemctl start pve-cluster