Adding 3rd node to a 2-node cluster setup

[Gurnsee]

Hi guys,

A year ago I built a 2-node cluster and followed instructions from this: https://forum.proxmox.com/threads/how-to-deploy-a-2-node-cluster-on-proxmox-4-x-ve.33550/
I set expected vote to 1 in /etc/corosync/corosync.conf because I don't need HA and will manually boot up VM in case one of the nodes went offline. Now I have acquired another server and want to add this node to existing cluster to complete a 3-node setup.

How may I proceed with this? Do I reverse everything from that post and config expected vote to 2 again or do I need to rebuild the whole cluster?

 

[Gurnsee]

Bump

I've searched around the forum and have not found anyone tried to return from a 2-nod cluster to normal 3-node.

 

[Chris]

Hi,
first of all please update to the latest version, here some info https://pve.proxmox.com/wiki/Upgrade_from_4.x_to_5.0
Yes, you should reconfigure expected votes to 2 and then add the 3rd node, don't forget to bump the config version https://pve.proxmox.com/pve-docs/pve-admin-guide.html#_corosync_configuration
Please follow the instructions here to add the third node https://pve.proxmox.com/pve-docs/pve-admin-guide.html#pvecm_join_node_to_cluster

 

[Gurnsee]

Awesome, glad to hear!

Thank you!