Changing IP address for all nodes in Proxmox Cluster

Steps

• Change IP in all nodes in following files /etc/network/interfaces and /etc/hosts
• Change all IP address in /etc/pve/corosync.conf
• Reboot all nodes.

Troubleshooting

If above failed during the synchronization, use following commands to fix it.

• Stop cluster services on the node that wasn't synchronized

systemctl stop corosync.service
systemctl stop pve-cluster

• Update the corosync.conf file manually

vi /etc/corosync/corosync.conf

• Restart cluster services

systemctl start corosync.service
systemctl start pve-cluster

Verify configuration file again and cluster status

cat /etc/corosync/corosync.conf
pvecm status