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Upgrade from Proxmox VE 6 to 7 using the free no subscription repository

How to perform an in-place upgrade from Proxmox VE 6 to 7 using the free no-subscription repository

Video guide: Upgrade from Proxmox VE 6 to 7 

1. Before you begin

1.1 Run Promox upgrade check script

Select your Proxmox server and open the Shell

pve6to7 --full

1.2 Install updates

apt update && apt dist-upgrade

1.3 Check Virtual Machine backups

Select Datacenter - Backup and check VM backups have completed OK

1.4 Check root partition free space

Select your Proxmox server - Summary and check HD space

1.5 Run Promox upgrade check script again

pve6to7 --full

1.6 Migrate or stop Virtual Machines

Migrate VMs and containers to another host or shutdown all running VMs

1.7 Linux bridge interface MAC address

Note the MAC address of the Linux bridge interface

ip link show

2. Update Debian and Proxmox repositories

2.1 Update Debian repositories to Bullseye

Check existing apt sources.list
nano /etc/apt/sources.list

Note: The current apt sources.list is using Debian Buster repositories

Update Debian repositories to Bullseye
sed -i 's/buster\/updates/bullseye-security/g;s/buster/bullseye/g' /etc/apt/sources.list

2.2 Update Proxmox repositories

  • The no-subscription Proxmox repository is in /etc/apt/sources.list which was updated in the last step.
  • If you have a subscription, the repository is in /etc/apt/sources.list.d/pve-enterprise.list and can be updated using this command
echo "deb https://enterprise.proxmox.com/debian/pve bullseye pve-enterprise" > /etc/apt/sources.list.d/pve-enterprise.list  

If you check apt sources.list again you will see the repositories have been updated to Bullseye.

2.3 Remove backports and Proxmox VE 6 repositories

nano /etc/apt/sources.list

  • Uncomment the backports line. Proxmox upgrades have not been tested with packages from backports.

3. Upgrade Debian to v11 and Proxmox to v7

The next steps will update Debian from v10 (Buster) to v11 (Bullseye) and Proxmox from v6 to v7

During the upgrade, you will be prompted if any files you have changed are going to be overwritten by the upgrade.

If you have changed any files, you can choose the option to "Keep the local version currently installed" 

3.1 Upgrade Debian and Proxmox

apt update && apt dist-upgrade
Do you want to continue? Yes

You are attempting to upgrade from proxmox-ve 6 to proxmox-ve 7. Please make sure to read the upgrade notes.
Press [enter] to continue with the upgrade

Press [q] to exit from the update notes

Configuration file /etc/issue modified
Yes. Install the package maintainer's version

Note: /etc/issue files contains information about the Proxmox release. In this case, I'm going to allow the Proxmox installer to change the file.

Configuring libc6
Restart services during package upgrades without asking? Yes

Configuring openssh-server
What do you want to do about modified configuration file sshd_config?
Keep the local version currently installed

Modified configuration file apticron
Keep the local version currently installed

Modified configuration file pve-enterprise.list
No. Keep the local version currently installed

3.2 Reboot the Proxmox host

Reboot the Proxmox host
Select your Proxmox server - Reboot


Upgrade from 6.x to 7.0

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