Is it possible to add a Version 7.2 node to version 6 cluster before upgrade

[mensinck]

Hi all.

We are in a process of upgrading an extenting our 4 node cluster.

When we setup a new node, is it possible to add this node to the existing versin 6.4 cluster.

We have ceph version 15.2 running on the existing cluster. So first installng ceph version 15 on the version 7 node should be possible and upgrading ceph after upgrading the whole cluster also?

Is there anything blocking this way?

Thanks for Your hints.

Regards Lukas

 

[datschlatscher]

While it is not recommended to run Proxmox with mixed versions, you should be able to safely do so as long as you need for the update. The usual approach here is to add the 7.2 node to the cluster, migrate all VMs and containers from an existing node to the new node. After the node does not have any guests anymore, you can begin updating it. Once you are done with that node, rinse and repeat with all remaining nodes until all cluster nodes are up-to-date.

Please make sure to read Updating from Proxmox version 6.x to Proxmox 7 so that the process goes smoothly. However, especially if it is a production system, you should always have a backup at hand. You never know when you might need one