can 6.4-14 and 8.1-2 be in one cluster ?

[emoxam]

Hello!
I'm going to add a few servers to my PVE 6.4-14 cluster, can i install 8.1-2 and add it to cluster to move some VMs to 8.1-2 and then upgrade 6.4-14 ..
thanks

 

[Chris]

Hello!
I'm going to add a few servers to my PVE 6.4-14 cluster, can i install 8.1-2 and add it to cluster to move some VMs to 8.1-2 and then upgrade 6.4-14 ..
thanks

Hi,
no that is not at all recommended and also not tested on our side. While it is possible to join nodes with a major version mismatch, this is typically limited to one version only.
So if you need to install a new node for the upgrade to work, please upgrade all the nodes to the latest version 6.x first, then install the new node with version 7 to join the cluster, than upgrade all the nodes to version 7 as described here [0], followed by the upgrade to version 8 as outlined here [1].

[0] https://pve.proxmox.com/wiki/Upgrade_from_6.x_to_7.0
[1] https://pve.proxmox.com/wiki/Upgrade_from_7_to_8

 

[emoxam]

thanks!