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-cluster
rm /var/lib/corosync/*
On the working node remove the removed node
pvecm delnode oldnode
pvecm expected 1
Ports needed for VE-cluster
8006/TCP
22/TCP
5405/UDP for corosync
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