Cluster 7.4-17 adding 8.3 node

[rjoensen]

Hello,

I am currently running a cluster of 4 nodes that are running 7.4-17

I acquired a new node, that I wanted to add to the cluster, and then gradually upgrade the other 4 nodes to 8.3.

Has anyone done this? Any issues?

The current cluster is also running ceph.

 

[Chris]

Hi,
why not upgrade the cluster first and only after the upgrade join the new node to the cluster? Please follow the upgrade guide carefully, and check out the known upgrade issues section https://pve.proxmox.com/wiki/Upgrade_from_7_to_8

 

[rjoensen]

Is that not the same principle? You will end up with a node that is 8.3 and the others are 7.4?

 

[Chris]

Yes, mixed node versions are compatible for subsequent major version, but it is recommended to only run a cluster for a limited period during the upgrade in that state. Please do note the requirements and possible issues in the linked wiki article.

I was just wondering what your motivation was to add the new node with the new version before the upgrade? Is it because of the currently even number of nodes?