设置数据库备份。¶

创建备份¶

1. 获得实例ID

   获取需为其创建备份的原始实例的ID:

   $ trove list
   +-----------+------------+-----------+-------------------+--------+-----------+------+
   |     id    |  name      | datastore | datastore_version | status | flavor_id | size |
   +-----------+------------+-----------+-------------------+--------+-----------+------+
   | 97b...ae6 | base_1     |   mysql   |     mysql-5.5     | ACTIVE |     10    |  2   |
   +-----------+------------+-----------+-------------------+--------+-----------+------+
   

2. 创建备份

   Create a new instance that will be a replica of the original instance. You do this by passing in the --replica_of option with the trove create command. This example creates a replica called replica_1. replica_1 is a replica of the original instance, base_1:

   $ trove create replica_1 6 --size=5 --datastore_version mysql-5.5 \
     --datastore mysql --replica_of ID_OF_ORIGINAL_INSTANCE
   

3. 验证备份状态

   在:command:trove show 命令中传递``replica_1``的实例ID，验证新创建的``replica_1``是 base_1``的备份(replica). 注意 ``replica_of 属性为``base_1``的ID.

   $ trove show INSTANCE_ID_OF_REPLICA_1
   +-------------------+--------------------------------------+
   | Property          | Value                                |
   +-------------------+--------------------------------------+
   | created           | 2014-09-16T11:16:49                  |
   | datastore         | mysql                                |
   | datastore_version | mysql-5.5                            |
   | flavor            | 6                                    |
   | id                | 49c6eff6-ef91-4eff-91c0-efbda7e83c38 |
   | name              | replica_1                            |
   | replica_of        | 97b4b853-80f6-414f-ba6f-c6f455a79ae6 |
   | status            | BUILD                                |
   | updated           | 2014-09-16T11:16:49                  |
   | volume            | 5                                    |
   +-------------------+--------------------------------------+
   

   在:command:trove show 命令中传递``base_1``的实例ID列出关联到原实例的所有备份。注意``replicas``属性设置为``replica_1``的ID. 如果有多个备份，以逗号分隔的形式显示。

   $ trove show INSTANCE_ID_OF_BASE_1
   +-------------------+--------------------------------------+
   | Property          | Value                                |
   +-------------------+--------------------------------------+
   | created           | 2014-09-16T11:04:56                  |
   | datastore         | mysql                                |
   | datastore_version | mysql-5.5                            |
   | flavor            | 6                                    |
   | id                | 97b4b853-80f6-414f-ba6f-c6f455a79ae6 |
   | ip                | 172.16.200.2                         |
   | name              | base_1                               |
   | replicas          | 49c6eff6-ef91-4eff-91c0-efbda7e83c38 |
   | status            | ACTIVE                               |
   | updated           | 2014-09-16T11:05:06                  |
   | volume            | 5                                    |
   | volume_used       | 0.11                                 |
   +-------------------+--------------------------------------+
   

4. 卸载备份

   如果原始数据库损坏，可以卸载备份。则备份成为独立的数据库。可以基于该备份重新创建备份。

   通过`trove detach-replica`卸载备份。

   $ trove detach-replica INSTANCE_ID_OF_REPLICA