Join of PVE 7.2.3 node to 7.2.11 HA Cluster

[pge]

Hey guys,
i need to re-install an existing node of my ha cluster because of a storage re-design.
Now the cluster is a 7.2.11, but i can only find a 7.2.3 iso. Would it be safe for a newly installed 7.2.3 machine to join the 7.2.11 cluster?

An update to 7.4 is not an option. This has been tried on the node before removal from the cluster and resulted in a broken connection.

 

[leesteken]

Proxmox does not have any built-in support for staying at a specific version. You'll need to manually determine the precise package versions (of everything) on an existing node and install the same versions on the new node. Maybe Proxmox Offline Mirror can help you keep all nodes on the same version in a future setup? Please note that PVE 7.x has been end of life and out of support for two years now (and 7.2 for over four years).

 

[pge]

Got it. Thanks for the feedback.
But would joining a 7.2.3 node to a 7.2.11 cluster pose a problem?
I dont specifically want to stay at that version and want to update but i dont see a specific safe path with a production cluster.

 

[leesteken]

But would joining a 7.2.3 node to a 7.2.11 cluster pose a problem?

I don't expect so but it is recommended to run the same version everywhere unless you are actively upgrading. Since major and minor version number parts are equal, they should be compatible and support migrations both ways (but the guarantee has expired on that version).

I dont specifically want to stay at that version and want to update but i dont see a specific safe path with a production cluster.

Upgrading to the latest minor within the release should be safe when doing it one (preferably empty) node at a time and not migrating VMs backwards. And there are upgrade guides for each major version. However, I got from your post that you had problems with updating a first node to 7.4? Since going through more than one major version is a lot of work, I would suggest starting a new cluster with PVE 9 by removing nodes from your PVE 7 and installing PVE 9 fresh on them one at a time, and to first test backups of VMs before commiting all old nodes.