Changing IP on nodes in existing cluster

[Loki]

Hello!
Is it safe to change IP address on one or more nodes in existing cluster? Will cluster be screwed up or not?

Thanks!

 

[udo]

Hello!
Is it safe to change IP address on one or more nodes in existing cluster? Will cluster be screwed up or not?

Thanks!

Hi Loki,
AFAIK there is an tread about this how it's work - use the search function.

Udo

 

[Loki]

Oh, sorry. Thanks to point it out

 

[wahmed]

I would caution not to simply change IP and reboot your Proxmox node. The node will be fully kicked out of cluster and messed up. At least it happened to mine long ago. This is how i fix and join same node with changed IP:
From any node other you are not changing IP address:
# pvecm delnode <IP_node_to_change>

Change IP, reboot then run the following commands from the node you are changing IP.
# /etc/init.d/pve-cluster stop
# umount /etc/pve
# /etc/init.d/cman stop
# rm /etc/cluster/cluster.conf
# rm -rf /var/lib/pve-cluster/*
# /etc/init.d/pve-cluster start
# pvecm add <any_node>