Comment 6 for bug 1824167

@ppeng, please provide a bit more info:
1. what was your deployment like? for example, 2+2+2 (computer nodes)??
2. server group info in details, output from cmd: openstack server group list and openstack server group show <server_group_uuid>
3. before live-migration, where was VM1 and VM2 running respectively?
4. after live-migration, when saying "successfully live_migrate VM_1, but failed to live_migrate VM_2", where was VM_1 located? was it migrated to a different host?