Comment 5 for bug 1720885

I configured an LVM Backend and tried this out and this worked fine for me.

cinder show 3f83570d-b1a0-4c91-9773-2b697c1e982d

+--------------------------------+--------------------------------------+
| Property | Value |
+--------------------------------+--------------------------------------+
| attached_servers | [] |
| attachment_ids | [] |
| availability_zone | nova |
| bootable | false |
| consistencygroup_id | None |
| created_at | 2019-08-02T08:17:09.000000 |
| description | None |
| encrypted | True |
| id | 3f83570d-b1a0-4c91-9773-2b697c1e982d |
| metadata | |
| migration_status | success |
| multiattach | False |
| name | encrypted volume |
| os-vol-host-attr:host | infra@lvmdriver-1#lvmdriver-1 |
| os-vol-mig-status-attr:migstat | success |
| os-vol-mig-status-attr:name_id | e9b415df-1ec7-4e41-a7c8-d9f4c8a39ba5 |
| os-vol-tenant-attr:tenant_id | 5cb1426e43cd4f2db6bb428a6051622a |
| replication_status | None |
| size | 1 |
| snapshot_id | None |
| source_volid | None |
| status | available |
| updated_at | 2019-08-02T09:56:23.000000 |
| user_id | d645bb574c394feeb2390140ed981f8c |
| volume_type | LUKS |
+--------------------------------+--------------------------------------+

I executed the command

cinder migrate --force-host-copy True 3f83570d-b1a0-4c91-9773-2b697c1e982d infra@lvmdriver-3
Request to migrate volume 3f83570d-b1a0-4c91-9773-2b697c1e982d has been accepted.

After the command.. I got

cinder show 3f83570d-b1a0-4c91-9773-2b697c1e982d
+--------------------------------+--------------------------------------+
| Property | Value |
+--------------------------------+--------------------------------------+
| attached_servers | [] |
| attachment_ids | [] |
| availability_zone | nova |
| bootable | false |
| consistencygroup_id | None |
| created_at | 2019-08-02T08:17:09.000000 |
| description | None |
| encrypted | True |
| id | 3f83570d-b1a0-4c91-9773-2b697c1e982d |
| metadata | |
| migration_status | success |
| multiattach | False |
| name | encrypted volume |
| os-vol-host-attr:host | infra@lvmdriver-3#lvmdriver-1 |
| os-vol-mig-status-attr:migstat | success |
| os-vol-mig-status-attr:name_id | None |
| os-vol-tenant-attr:tenant_id | 5cb1426e43cd4f2db6bb428a6051622a |
| replication_status | None |
| size | 1 |
| snapshot_id | None |
| source_volid | None |
| status | available |
| updated_at | 2019-08-02T10:15:17.000000 |
| user_id | d645bb574c394feeb2390140ed981f8c |
| volume_type | LUKS |
+--------------------------------+--------------------------------------+

Can you explain why os-vol-mig-status-attr:migstat | error | occured.

I'm new here..So please help me in finding the solution.!