In-Place Upgrade Proxmox VE from 7 to 8

💡 NOTE: These steps are for a single standalone Proxmox server. They have not been tested in a clustered environment

🚨 WARNING: Make sure to create external backups of all important VMs and CTs just in case something goes wrong. You've been warned.

Log into Proxmox VE, either at the console or the web UI and launch the web shell
Stop all running VMs and CTs
Run the following commands to make sure Proxmox VE is running the latest 7 updates
# disable proxmox commmercial repo
sed -i "s/^deb/\#deb/" /etc/apt/sources.list.d/pve-enterprise.list
# add the proxmox community repo
echo "deb http://download.proxmox.com/debian/pve $(grep "VERSION=" /etc/os-release | sed -n 's/.*($.*$).*/\1/p') pve-no-subscription" > /etc/apt/sources.list.d/pve-community.list
# update software repositories
apt update
# install software updates
apt dist-upgrade -y
# clean apt cache
apt clean
# run the upgrade checklist utility, resolve any issues reported before continuing
pve7to8 --full
# update apt repositories to bullseye
sed -i 's/bullseye/bookworm/g' /etc/apt/sources.list && sed -i 's/bullseye/bookworm/g' /etc/apt/sources.list.d/pve-community.list && sed -i 's/bullseye/bookworm/g' /etc/apt/sources.list.d/pve-enterprise.list
# update software repositories
apt update
# install software updates
apt dist-upgrade -y
# clean apt cache
apt clean
# reboot
reboot now
That's it, Proxmox VE has now been updated to the latest v8.x

In-Place Upgrade Proxmox VE from 7 to 8 🌱