nova list
nova show e4b3c2a4-1132-49e4-8335-1b5974cd70d8
| OS-EXT-SRV-ATTR:instance_name | instance-0000003e
[root@compute-kilo-z ~]# virsh dumpxml instance-0000003e| grep vnc
<graphics type='vnc' port='5903' autoport='yes' listen='193.168.141.46' keymap='en-us'>
193.168.141.46:5903