原文：Transfer a Volume

Transfer a volume

这个功能可以使volume在不同的租户间转移。

通过cinder transfer*等命令可以完成volume的过户。对于volume的发送方，需要创建一个transfer，然后将transfer的id和authorization key发送给接收方。接收方得到id和key之后就能通过命令完成volume的过户。

适用于接收方和发送方，需要在同一个云环境内。

创建transfer

volume的提供方（所有者）：

首先要保证volume是available状态

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# cinder list
+--------------------------------------+-----------+------------------+------+------+-------------+----------+-------------+-------------+
|                  ID                  |   Status  | Migration Status | Name | Size | Volume Type | Bootable | Multiattach | Attached to |
+--------------------------------------+-----------+------------------+------+------+-------------+----------+-------------+-------------+
| 220dec77-9d4c-4bb5-869e-647efef7921c | available |        -         |  t1  |  5   |      -      |   true   |    False    |             |
+--------------------------------------+-----------+------------------+------+------+-------------+----------+-------------+-------------+
# cinder transfer-create 220dec77-9d4c-4bb5-869e-647efef7921c
+------------+--------------------------------------+
|  Property  |                Value                 |
+------------+--------------------------------------+
|  auth_key  |           568b429714aae29c           |
| created_at |      2015-10-26T08:20:04.398648      |
|     id     | d93180c9-6c4e-45e3-81ac-cfdadd467428 |
|    name    |                 None                 |
| volume_id  | 220dec77-9d4c-4bb5-869e-647efef7921c |
+------------+--------------------------------------+

创建transfer的结果中输出了auth key，但是对于命令cinder transfer-show的话，这个key是不可见的。

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# cinder transfer-list
+--------------------------------------+--------------------------------------+------+
|                  ID                  |              Volume ID               | Name |
+--------------------------------------+--------------------------------------+------+
| d93180c9-6c4e-45e3-81ac-cfdadd467428 | 220dec77-9d4c-4bb5-869e-647efef7921c |  -   |
+--------------------------------------+--------------------------------------+------+
# cinder transfer-show d93180c9-6c4e-45e3-81ac-cfdadd467428
+------------+--------------------------------------+
|  Property  |                Value                 |
+------------+--------------------------------------+
| created_at |      2015-10-26T08:20:04.000000      |
|     id     | d93180c9-6c4e-45e3-81ac-cfdadd467428 |
|    name    |                 None                 |
| volume_id  | 220dec77-9d4c-4bb5-869e-647efef7921c |
+------------+--------------------------------------+

创建好transfer后，将transfer的id和key发送给接收方。

volume接收方：

得到transfer的id和auth key后就可以接收了

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# cinder transfer-accept d93180c9-6c4e-45e3-81ac-cfdadd467428 568b429714aae29c
+-----------+--------------------------------------+
|  Property |                Value                 |
+-----------+--------------------------------------+
|     id    | d93180c9-6c4e-45e3-81ac-cfdadd467428 |
|    name   |                 None                 |
| volume_id | 220dec77-9d4c-4bb5-869e-647efef7921c |
+-----------+--------------------------------------+

如果接收方的配额不满足volume的话接收请求被拒绝，但transfer不会消失，直到接收成功或被删除。

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# cinder transfer-accept d93180c9-6c4e-45e3-81ac-cfdadd467428 568b429714aae29c
ERROR: Requested volume or snapshot exceeds allowed gigabytes quota. Requested 5G, quota is 0G and 0G has been consumed. (HTTP 413) (Request-ID: req-173c3f2c-8c73-4aea-8af8-ef1fb0e04d5d)