Proxmox 5 to 6 Upgrade

Upgraaaaaaade!

How to upgrade from Proxmox 5 to 6.

Official documentation : https://pve.proxmox.com/wiki/Upgrade_from_5.x_to_6.0

Requirements

• Make sure your /boot partition has enough place for the new Kernel.
• Make sure you actually have a healthy cluster (all nodes present, no cluster errors).
• Make sure you cluster is running the latest packages for you current release (sudo apt-get update && sudo apt-get upgrade on all nodes
• Accept the harsh reality that you might end up scrapping an hypervisor (make sure you have backups!)
• You will need to reboot the Hypervisor following the Kernel upgrade so either migrate the VM out or shutdown the VMs first.

Overall Process

Run the PVE 5 to 6 migration checklist script.

root@bacon:~#  pve5to6
= CHECKING VERSION INFORMATION FOR PVE PACKAGES =

----- SNIPPED OUTPUT -----


TOTAL:    24
PASSED:   19
SKIPPED:  2
WARNINGS: 3
FAILURES: 0

Make sure you know that the Warnings are known and that no Failures are present.

Shutdown and upgrade Corosync first (ON ALL NODES - BEFORE UPDATING OTHER PACKAGES).

systemctl stop pve-ha-lrm
echo "deb http://download.proxmox.com/debian/corosync-3/ stretch main" > /etc/apt/sources.list.d/corosync3.list
apt update
apt dist-upgrade --download-only
apt dist-upgrade

Upgrade Proxmox

Remove any leftover packages

apt-get autoremove

Proceed with the actual upgrade

sed -i -e 's/stretch/buster/g' /etc/apt/sources.list.d/pve-install-repo.list 
apt update
apt dist-upgrade
shutdown -r now
#Confirm the PVE version actually running
pveversion