How to Rename Proxmox Node with Existing VMs & Containers
Proxmox VE uses the hostname as a nodes name, so changing it works similar to changing the host name. This must be done on a empty node.
Please note that you have only tp try this on a single Proxmox node, and NOT a node joined to a cluster.
Change to the new hostname in the following 3 files:
nano /etc/hosts
nano /etc/hostname
nano /etc/postfix/main.cf
Reboot Proxmox.
Next, copy the VMs and configuration to the new hostname folder:
cd /etc/pve/nodes/
cp -r old_hostname/qemu-server new_hostname/qemu-server
rm -r old_hostname
cd /var/lib/rrdcached/db/pve2-node/
cp -r old_hostname new_hostname
rm -r old_hostname
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