need to Change hostname for nodes in proxmox cluster

[powersupport]

Hi,

Can anyone advise on how to change the hostname of nodes in a proxmox cluster? We have tried to change it by editing the below files but it is not working.

• /etc/hosts
• /etc/hostname
  
  
  
  

 

[bbgeek17]

please review the references here:
https://forum.proxmox.com/threads/change-hostname.120818/#post-524901

If you tried everything and its still not working, do add
- your previous config
- your current config
- what you did
- why do you think its not working
- OS/PVE versions

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Blockbridge : Ultra low latency all-NVME shared storage for Proxmox - https://www.blockbridge.com/proxmox

 

[alexskysilk]

Can anyone advise on how to change the hostname of nodes in a proxmox cluster?

Dont. just dont.

What you can do, if you REALLY must, is to evict nodes one by one, reinstall (do NOT skip this part), and read. see https://pve.proxmox.com/wiki/Cluster_Manager#_remove_a_cluster_node

please review the references here:
https://forum.proxmox.com/threads/change-hostname.120818/#post-524901

yes, you can follow the link in that link but even they don't recommend doing it. screwing up here can lead to data corruption.

 

[bbgeek17]

yes, you can follow the link in that link but even they don't recommend doing it. screwing up here can lead to data corruption.

I've done it successfully in our lab a few times. That said, if someone manages to do it incorrectly and cause some sort of cluster wide issue - it wouldnt surprise me.

PS if this was a production cluster and I had to do this, I would build a virtual cluster matching the config and try there. Perfect use for a cluster of hypervisors

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Blockbridge : Ultra low latency all-NVME shared storage for Proxmox - https://www.blockbridge.com/proxmox