Is renaming a cluster node in a 4.4 cluster possible?

[ewuewu]

Hi all,

I've installed a new node to a 5 node cluster (pve 4.4). After I've configured everything I need (incl. ceph) I recognised that I've messed up the hostname of the new node.

My question: Is there a reliable way to change the hostname of my new node without reinstalling everything?

 

[MRosu]

I was able to do it, though I don't fully remember what I did cause it was a stressful situation. I did have an issue at first where I had two nodes showing up in GUI, one with old hostname, one with newhostname but without anything working.... then I went through and changed everything I could find that referenced the old hostname to the new hostname.

Here are the files I changed and procedures I took that I can think of:

On the host which name you want to change:

/etc/hostname - make sure hostname is name you want
/etc/hosts - make sure hostname is name you want
/etc/pve/corosync.conf - make sure hostname matches

Then make sure folder located in /etc/pve/nodes which reflects old hostname is moved to the new hostname.

Eg:
old hostname = nodename12, folder name = nodename12
new hostname = newName32, folder name = newName32

I only have a 2 node cluster, and I did this for both hosts (may not be necessary?)

Then you will have to get the new SSH key by the known method of ssh from a node in cluster to the new host name, or else it won't connect either.

Since I lost quorum it was a bit trickier to do all this, but maybe it should be easier for you.

edit: I also restarted the host, and when I did everything "correctly", it worked. So yes, it IS possible, but may be a bit scary if you don't do everything necessary first =D

 

[udo]

Hi,
and if you use the enterprise-repro you must renew your subscription.

Udo

 

[ewuewu]

Thank you Guys, you saved my day.
It works like a charm.