What's this?

Cinder volume を別の Storage backend へ移動

Initial state

Cinder Services

# cinder service-list
+------------------+---------+-------+---------+-------+----------------------------+
|      Binary      | Host    |  Zone |  Status | State |         Updated_at         |
+------------------+---------+-------+---------+-------+----------------------------+
|  cinder-backup   | node-17 |  nova | enabled |   up  | 2015-03-09T06:58:19.000000 |
|  cinder-backup   | node-18 |  nova | enabled |   up  | 2015-03-09T06:58:28.000000 |
|  cinder-backup   | node-22 |  nova | enabled |   up  | 2015-03-09T06:58:28.000000 |
| cinder-scheduler | node-17 |  nova | enabled |   up  | 2015-03-09T06:58:25.000000 |
| cinder-scheduler | node-18 |  nova | enabled |   up  | 2015-03-09T06:58:28.000000 |
| cinder-scheduler | node-22 | nova2 | enabled |   up  | 2015-03-09T06:58:23.000000 |
|  cinder-volume   | node-17 |  nova | enabled |   up  | 2015-03-09T06:58:26.000000 |
|  cinder-volume   | node-18 |  nova | enabled |   up  | 2015-03-09T06:58:21.000000 |
|  cinder-volume   | node-22 | nova2 | enabled |   up  | 2015-03-09T06:58:21.000000 |
+------------------+---------+-------+---------+-------+----------------------------+

AZ

# cinder availability-zone-list
+-------+-----------+
|  Name |   Status  |
+-------+-----------+
|  nova | available |
| nova2 | available |
+-------+-----------+

Host

# cinder-manage host list
host          zone
node-17       nova
node-18       nova
node-22       nova2

Cinder Volume

# cinder list
+--------------------------------------+-----------+--------------+------+-------------+----------+-------------+
|                  ID                  |   Status  | Display Name | Size | Volume Type | Bootable | Attached to |
+--------------------------------------+-----------+--------------+------+-------------+----------+-------------+
| 3ffaaea5-24a0-414b-a6c2-7c28a888795b | available | admin_vol01  |  1   |     None    |  false   |             |
+--------------------------------------+-----------+--------------+------+-------------+----------+-------------+

# cinder show 3ffaaea5-24a0-414b-a6c2-7c28a888795b
+--------------------------------+--------------------------------------+
|            Property            |                Value                 |
+--------------------------------+--------------------------------------+
|          attachments           |                  []                  |
|       availability_zone        |                 nova                 |
|            bootable            |                false                 |
|           created_at           |      2015-03-09T06:41:33.000000      |
|      display_description       |                                      |
|          display_name          |             admin_vol01              |
|           encrypted            |                False                 |
|               id               | 3ffaaea5-24a0-414b-a6c2-7c28a888795b |
|            metadata            |                  {}                  |
|     os-vol-host-attr:host      |        node-17                       |
| os-vol-mig-status-attr:migstat |                 None                 |
| os-vol-mig-status-attr:name_id |                 None                 |
|  os-vol-tenant-attr:tenant_id  |   a8085d1871f847bdb906ef4a28d1bd48   |
|              size              |                  1                   |
|          snapshot_id           |                 None                 |
|          source_volid          |                 None                 |
|             status             |              available               |
|          volume_type           |                 None                 |
+--------------------------------+--------------------------------------+

Migrate cinder volume to different backend

Migrate volume(admin_vol01) from backend(node-17) to backend(node-18)

# cinder migrate 3ffaaea5-24a0-414b-a6c2-7c28a888795b node-18

Created new Cinder volume(93f650fd-c4b3-420a-8409-d333c12e4d9c) as same name.

# cinder list
+--------------------------------------+-----------+--------------+------+-------------+----------+-------------+
|                  ID                  |   Status  | Display Name | Size | Volume Type | Bootable | Attached to |
+--------------------------------------+-----------+--------------+------+-------------+----------+-------------+
| 3ffaaea5-24a0-414b-a6c2-7c28a888795b | available | admin_vol01  |  1   |     None    |  false   |             |
| 93f650fd-c4b3-420a-8409-d333c12e4d9c | available | admin_vol01  |  1   |     None    |  false   |             |
+--------------------------------------+-----------+--------------+------+-------------+----------+-------------+

New Cinder volume(93f650fd-c4b3-420a-8409-d333c12e4d9c) is on backend(node-18)

# cinder show 93f650fd-c4b3-420a-8409-d333c12e4d9c
+--------------------------------+---------------------------------------------+
|            Property            |                    Value                    |
+--------------------------------+---------------------------------------------+
|          attachments           |                      []                     |
|       availability_zone        |                     nova                    |
|            bootable            |                    false                    |
|           created_at           |          2015-03-09T06:41:33.000000         |
|      display_description       |                                             |
|          display_name          |                 admin_vol01                 |
|           encrypted            |                    False                    |
|               id               |     93f650fd-c4b3-420a-8409-d333c12e4d9c    |
|            metadata            |                      {}                     |
|     os-vol-host-attr:host      |            node-18                          |
| os-vol-mig-status-attr:migstat | target:3ffaaea5-24a0-414b-a6c2-7c28a888795b |
| os-vol-mig-status-attr:name_id |                     None                    |
|  os-vol-tenant-attr:tenant_id  |       a8085d1871f847bdb906ef4a28d1bd48      |
|              size              |                      1                      |
|          snapshot_id           |                     None                    |
|          source_volid          |                     None                    |
|             status             |                  available                  |
|          volume_type           |                     None                    |
+--------------------------------+---------------------------------------------+

Cinder rename

# cinder rename 93f650fd-c4b3-420a-8409-d333c12e4d9c admin_vol11

# cinder list
+--------------------------------------+-----------+--------------+------+-------------+----------+-------------+
|                  ID                  |   Status  | Display Name | Size | Volume Type | Bootable | Attached to |
+--------------------------------------+-----------+--------------+------+-------------+----------+-------------+
| 3ffaaea5-24a0-414b-a6c2-7c28a888795b | available | admin_vol01  |  1   |     None    |  false   |             |
| 93f650fd-c4b3-420a-8409-d333c12e4d9c | available | admin_vol11  |  1   |     None    |  false   |             |
+--------------------------------------+-----------+--------------+------+-------------+----------+-------------+

Environment

Openstack : Juno
Ceph : Firefly

Reference

Cinder Migration to Different Backend
Cinder Migration to Different AZ
Cinder Migration to Different Region