Changing the hostname of a Proxmox 8 VE

[kartr]

I tried changing the hostname using hostnamectl and editing the hostname in /etc/hosts but that broke the node completely and the panel showed up empty upon login. I changed back to the old hostname and rebooted and everything's fine now.

I already read the doc and it says that hostname may only be changed if a node has no VMs but I already do have a few VMs and want to change the hostname of the node, what is the correct/official way to achieve this without breaking anything?

 

[sw-omit]

Like it says in the doc, there (probably) is no official way for it

That said though, most likely you'll have to change/copy over some of the folders in the /etc/pve folder with the name of the host in the folder-name in it. (for example /etc/pve/nodes, if you look there now you probably have your old and new name in there)

 

[tcabernoch]

Don't do this. And if you do it, take a look at the name of your certs. Even after you change all the rest of the stuff, its still gonna be root@originalmachinename. But don't do this. It's easier to wipe the machine and start over.
Really. This is such a bad idea. When you're done, you think its all ok. It's not.

 

[moPLr38mBbTRW6XY3pER]

Following this guide worked for me just now:

https://www.youtube.com/watch?v=2NzLYKRVRtk

I had an lxc (the only lxc or vm on that node) that was orphaned after changing the node's hostname.

First I reverted the hostname of the node to ensure everything was ok, then I followed the (youtube) guide linked above.