Change cluster network

[carlosmp]

Wondering what the best process would be to change the cluster network to a different network range.

I've prepared the hosts file with the new ip/hostname. I can ping by name and ip. I also have corosync.conf with the new node IP/Names and ready to go with the new config_version number.

Since this is a live system, trying to be a bit cautious. Anything else to look for or prepare for? If the individual VMs are setup for HA, will they not bounce around? Perhaps move all the vm's away from the first node prior to reboot?

Thanks in advance.

 

[wolfgang]

Hi,

see
https://pve.proxmox.com/wiki/Separate_Cluster_Network

 

[carlosmp]

Wolfgang - That's where I got the steps from. I was just hoping for more info or any glitches that I should be on the lookout for. Fortunately, nothing happened.

Thanks again

 

[wolfgang]

When you do this operation you should disable HA for this time.
migration is not necessary and you can do this also on the fly.

If I where you I would make a virtual 3 node cluster on you real cluster and simulate the operation.

 

[Whatever]

Wolfgang, could you please clarify one more thing:
When we separate corosync network from data and storage ones which one is used for VM migration?

 

[wolfgang]

For the migration we use the cluster network.