Add proxmox 5.x to Proxmox Culster ver 4.x

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D.P.

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May 13, 2016
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Hi!
I have Proxmox cluster version 4.4 with Ceph and I'm going to add to it a new brand server with Proxmox version 5.1.

Can there be any problems? Do I have anything to pay attention to?
I plan to upgrade all servers to version 5.1.

Regards,
Darek
 
Thank you for this tip.
Can I mix Proxmox 4.x and 5.1 hosts in one cluster?
 
D.P. said:
So, If I want to upgrade Proxmox 4.4 cluster to 5.1: I must shutdown all cluster's hosts and
upgrade host one by one according to this document: https://pve.proxmox.com/wiki/Upgrade_from_4.x_to_5.0
Click to expand...
Where in the wiki article does it say that? You can mix 4.x with 5.x for the purpose of the upgrade. On migration of your VMs/CTs you might not be able to migrate back to the 4.x hosts.
 
D.P. said:
I've found this thread: https://forum.proxmox.com/threads/4-4-and-5-x-version-in-the-same-cluster.37170/
Click to expand...
Yes. I think you can use ansible for that.
For exampe:

Prepare:
  • apt-get update in one node
  • copy /var/lib/apt/lists folder to ansible host
  • create apt-cacher-ng
Run ansible on all servers with step like this:
  • do snapshot of your data+os
  • copy /var/lib/apt/lists
  • Setup apt-cacher-ng address.
  • Disable cluster network.
  • Do apt-get distr-upgrade in all machine.
  • Reboot all machine
Enjoy! This is suitable for simple cluster. You need to test it in your test lab.
 
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