Migrating an LXC container

As of Proxmox VE 4.1, live migration of LXC containers is not possible. The container must be turned off before it can be moved. This is not a limitation of Proxmox but rather a LXC technology itself. If we try to migrate a powered on LXC container live, we will be presented with the following error message in the GUI:

To migrate a powered off container, right-click on Container to open the Context menu, and then select Migrate or click on the Migrate button in the top-right corner of the GUI to open the Migration dialog box. Select a destination node from the drop-down list then click Migrate. After the migration is completed, turn on the container on the destination node. The live migration, however, is at the heavy development stage by LXC, so we should expect it in the mainstream LXC package in the near future. To some of us, the lack of this feature may be a huge deal breaker, especially in a container-dominant environment with many container instances. But...