Quick old tip (back from the cave) to trigger a live migration from a specific network card.

In order to make it working you need to be able to resolve the ip of the desired interface, let’s put it that way:

• eth0 is default, hostname is node01
• eth1 is 10GB hostname is node01-s

Add this in your nova.conf:

live_migration_uri=qemu+tcp://%s-s/system

%s is your destination host (as a python variable), it points to the name used from the command line.

The live migration will now use the node with -s, but the command line remains the same

$ nova live-migration <vm> node01

Enjoy a fast live migration!