Based on LibvirtDriver migration code, specifically migrate_disk_and_power_off(), it does not look like migration for LVM backed instances was ever implemented. The unit tests for migrate_disk_and_power_off(), also, cover only raw and qcow2 backed instances.
Based on LibvirtDriver migration code, specifically migrate_ disk_and_ power_off( ), it does not look like migration for LVM backed instances was ever implemented. The unit tests for migrate_ disk_and_ power_off( ), also, cover only raw and qcow2 backed instances.