Below is the instance detail. It's host is stilling compute1(the source node)
[root@controller ~]# nova show eb46eb30-08ae-4faa-a62e-b5f100bcddf5
+--------------------------------------+------------------------------------------------------------+
| Property                             | Value                                                      |
+--------------------------------------+------------------------------------------------------------+
| OS-DCF:diskConfig                    | MANUAL                                                     |
| OS-EXT-AZ:availability_zone          | aaaaaaa                                                    |
| OS-EXT-SRV-ATTR:host                 | compute1                                                   |
| OS-EXT-SRV-ATTR:hypervisor_hostname  | compute1                                                   |
| OS-EXT-SRV-ATTR:instance_name        | instance-0000003b                                          |
| OS-EXT-STS:power_state               | 0                                                          |
| OS-EXT-STS:task_state                | -                                                          |
| OS-EXT-STS:vm_state                  | active                                                     |
| OS-SRV-USG:launched_at               | 2016-05-30T06:11:41.000000                                 |
| OS-SRV-USG:terminated_at             | -                                                          |
| accessIPv4                           |                                                            |
| accessIPv6                           |                                                            |
| admin-net network                    | 192.168.0.61                                               |
| config_drive                         | True                                                       |
| created                              | 2016-05-30T02:53:37Z                                       |
| flavor                               | mini (100000000)                                           |
| hostId                               | da6fc182d7a4592413365df255c835eb99d233d8e1c479642caa7a9f   |
| id                                   | eb46eb30-08ae-4faa-a62e-b5f100bcddf5                       |
| image                                | cirros-0.3.1-x86_32 (6e1c83af-e57e-44eb-8a7d-0296b5f464ef) |
| key_name                             | -                                                          |
| metadata                             | {"admin_pass": "a", "admin_user": "root"}                  |
| name                                 | vm1                                                        |
| os-extended-volumes:volumes_attached | []                                                         |
| os_type                              | linux                                                      |
| progress                             | 0                                                          |
| security_groups                      | default                                                    |
| status                               | ACTIVE                                                     |
| tenant_id                            | 2c2643bad4d6489a99be97fd69c4fdcc                           |
| updated                              | 2016-05-30T06:18:13Z                                       |
| user_id                              | 9646cdbcb7644ee79d80b0b54a6fcebe                           |
+--------------------------------------+------------------------------------------------------------+