+ # TUNNELLED mode provides a security enhancement when using shared storage but is not
+ # supported when not using shared storage.
+ # See https://bugzilla.redhat.com/show_bug.cgi?id=1301986#c12
+ # In future versions of QEMU (2.6, mostly), Dan's native encryption
+ # work will obsolete the need to use TUNNELLED transport mode.
+ nova::migration::live_migration_tunnelled: {get_input: nova_enable_rbd_backend}