Renaming a PVE node with VMs

Change the new hostname in the following 3 files:

nano /etc/hosts

nano /etc/hostname

nano /etc/postfix/main.cf

Make a Backup of all the files and folder below before beginning …

mkdir /home/pve2-node/yourhostname
mkdir /home/pve2-storage/yourhostname
mkdir /etc/pve/nodes/yourhostname

Now lets begin
Next, copy the VMs and configuration to the new hostname folder:

cd /etc/pve/nodes/

cp -r old_hostname/ new_hostname/

rm -r old_hostname

Also copy the contents of /var/lib/rrdcached/db/pve2-{node,storage}/old-hostname to /var/lib/rrdcached/db/pve2-{node,storage}/new-hostname and remove the old directory.

cd /var/lib/rrdcached/db/pve2-node/
cp -r old_hostname new_hostname
cd /var/lib/rrdcached/db/pve2-storage/
cp -r old_hostname new_hostname

Now remove the old hostname from both folders.

cd /var/lib/rrdcached/db/pve2-node/
rm -r old_hostname
cd /var/lib/rrdcached/db/pve2-storage/
rm -r old_hostname

Now reboot!

reboot

That’s it, It should now show all your vm’s with your new hostname.

NOTE:
If you run into issues, reverse the process by returning the original files you backed up, to there original locations while also returning your hostname back to its original and all will return to normal.