Remove a host from cluster
systemctl stop pve-cluster
systemctl stop corosync
Start local cluster
pmxcfs -l
Delete corosync config
rm /etc/pve/corosync.conf rm -r /etc/corosync/*
Restore normal status
killall pmxcfs
systemctl start pve-clusterrm /var/lib/corosync/*
On the working node remove the removed node
pvecm delnode oldnodepvecm expected 1Ports needed for VE-cluster
8006/TCP
22/TCP
5405/UDP for corosync