[tech] Proxmox Upgrade

[Felix von Perger]

Dear tech subscribers,

I am intending to perform an upgrade of our Proxmox cluster from the old 
(and soon unsupported) version of 4.4 to the latest 5.1 in the next few 
days. I'll keep people informed over IRC and Discord about any specific 
(temporary) outages that may occur.

All VMs and containers will be migrated from each host, a disk-level 
backup of the root volume will be made, packages will be upgraded and 
the host will be rebooted and upon successful completion of the upgrade 
the VMs will be migrated back and powered on.

Each node will be upgraded individually according to the instructions at 
https://pve.proxmox.com/wiki/Upgrade_from_4.x_to_5.0

Due to maltair having recently experienced unplanned downtime, it will 
be the first to be upgraded (and hopefully this will also resolve the 
stability issues.) Loveday and medico will follow. Let me know if you 
have any concerns, complaints, questions or want to help out.

Following the successful upgrade of the proxmox cluster (and after any 
resulting issues have been resolved) I will attempt to configure a ceph 
"luminous" distributed storage cluster using the 500GB SSDs installed in 
each of maltair, loveday and medico onto which core VMs will eventually 
be migrated. Further information will be provided following the upgrade.

Kind regards, [FVP]