Upgrade from 1.9 to 2.0

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Revision as of 14:28, 29 March 2012 by Martin (talk | contribs) (Start the upgrade)
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There are two possibilities to move from 1.9 to 2.0:

  • New installation on new hardware (and restore VM´s from backup), recommended way.
  • In-place upgrade via upgrade script

In-place upgrade from 1.9 to 2.0 is a demanding task, but we provide an upgrade script to simplify this. You can use the script to update a 1.9 default installation to 2.0. Upgrades should only be done on non-modified systems (default ISO installs), and from experienced admins. Please read http://www.debian.org/releases/stable/amd64/release-notes/ch-upgrading.html to get an idea on what needs to be done.

New installation on new hardware

If possible, install 2.0 on new servers and move your VM´s step by step via backup/restore. If you choose this method you can do the move step by step and with minimum risk.

In-place upgrade via script

Before you start, make sure you have a valid backup of all your settings, VM´s and CT´s. If the upgrade fails, you should be able to do a clean ISO installations and restore all VM´s and CT´s from backup.

We provide an upgrade script which does the following:

  • Remove Proxmox VE 1.9 packages (save old configs)
  • Dist-upgrade from Lenny to Squeeze
  • Installation of Proxmox VE 2.0
  • Import most old settings
  • Purge obsolete packages


  • Up2date Proxmox VE 1.9
  • Running 2.6.32 kernel
  • Backup of all VM´s and CT´s
  • No running VM´s or CT´s
  • Enough free space in your /root filesystem

Start the upgrade

  • Login to your Proxmox VE host with SSH and download the script:
wget http://download.proxmox.com/debian/dists/squeeze/pve/pve-upgrade-1.9-to-2.0
  • make the script executable:
chmod +x pve-upgrade-1.9-to-2.0
  • Stop all your VMs and Containers
  • Execute the script.

Depending on your Internet connection and hardware the upgrade will take some time (if everything is fast it will take about 10 minutes). The script is idempotent, so you can safely restart it if something goes wrong.


The script writes a detailed log to 'pve-upgrade.log', and moves old configuration to:

/etc/qemu-server ==> /etc/qemu-server.old-1.9
/etc/pve ==> /etc/pve.old-1.9
/etc/vz/conf ==> /etc/vz/conf.old-1.9
  • Reboot. Consider running 'upgrade-from-grub-legacy' if boot works without problems.
  • Cluster configuration: if you run a cluster, you need to configure or join the cluster now (see Cluster below)
  • Import old setting (VM´s and CT´s)
./pve-upgrade-1.9-to-2.0 --import
  • Check system, see first steps with 2.0
  • Purge obsolete packages to save disk space (optional, use with care and only if you did not installed optional packages)
./pve-upgrade-1.9-to-2.0 --purge

Cluster upgrades

The 1.9 cluster setup will not upgraded. That means, after successful upgrade of all nodes you need to build the new cluster, see cluster.

After you joined all nodes you can start the import of VM´s and CT´s.

External links

Release Notes for Debian GNU/Linux 6.0 (squeeze), 64-bit PC