Converting OpenVZ to LXC

This section is for container users who are still using Proxmox 3.x or earlier with OpenVZ container technology. Since OpenVZ has been completely replaced in Proxmox VE 4.0 and later versions, all OpenVZ containers must be converted to LXCs in order to make them usable. The full conversion can be performed through the Proxmox GUI. The simple process of this conversion can be summarized as follows:

1. Write down the OpenVZ container network information.
2. Power off the OpenVZ container, and then perform a full backup.
3. Restore the OpenVZ container on Proxmox 4.0 or later.
4. Reconfigure the network based on information collected in step 1.

Note

Do not upgrade to Proxmox VE 4.0 or later before making a full backup of the existing OpenVZ containers. Otherwise, these containers will not start.

The reason it is important to write down the network configuration in step 1 is that when OpenVZ containers are restored in Proxmox 4.0 or later, the network interfaces are stripped off and need...