Running cluster - is it possible to change nodes ip addresses

[m3a2r1]

I've got running cluster with 3 nodes and I've changed them ip addresses. And they stopped to run as cluster.
Is it possible to change ips on running cluster or I have to revert addresses, disconnect all nodes then change addresses and connect again?

 

[oguz]

hi,

how did you perform the IP address change?

if you have a cluster and want to make changes you should edit coroync.conf [0]

you can first try to revert the IPs to get it to a working state again.

also you should take a look at [1] (there are other files to be edited like /etc/hosts)

[0]: https://pve.proxmox.com/pve-docs/chapter-pvecm.html#pvecm_edit_corosync_conf
[1]: https://pve.proxmox.com/wiki/Renaming_a_PVE_node

 

[m3a2r1]

But corosync.conf is write protected. How to edit it?

 

[oguz]

root can edit it. please read the links i've sent for instructions

 

[m3a2r1]

Is it normal that on broken cluster I can't edit anything in /etc/pve directory?

 

[oguz]

you can try to stop it and start it locally:

systemctl stop pmxcfs
pmxcfs -l # starts local cfs

then try editing the file. when you're done:

killall pmxcfs
systemctl start pmxcfs