You can call the RebuildDBInstance operation to rebuild the secondary instance of a primary ApsaraDB RDS instance in a dedicated cluster.

Dedicated clusters allow you to manage a number of instances at a time. You can create multiple dedicated clusters in a single region. Each dedicated cluster consists of multiple hosts. You can create multiple instances on each host. For more information, see What is ApsaraDB MyBase?


OpenAPI Explorer automatically calculates the signature value. For your convenience, we recommend that you call this operation in OpenAPI Explorer. OpenAPI Explorer dynamically generates the sample code of the operation for different SDKs.

Request parameters

Parameter Type Required Example Description
Action String Yes Rebuild instance

The operation that you want to perform. Set the value to RebuildDBInstance.

DedicatedHostGroupId String Yes dhg-4nxxxxxxx

The ID of the dedicated cluster. You can call the DescribeDedicatedHostGroups operation to query the IDs of dedicated clusters.

DBInstanceId String Yes rm-uf6wjk5xxxxxxx

The ID of the primary instance.

DedicatedHostId String No i-bpxxxxxxx

The ID of the host on which the system rebuilds the secondary instance.

Note If you do not specify this parameter, the system preferentially rebuilds the secondary instance on the original host on which the secondary instance resides. If the remaining storage space of the original host is insufficient, the system rebuilds the secondary instance on a host on which the primary instance does not reside. If no suitable hosts are found, the system reports an error that indicates insufficient storage space.
RegionId String No cn-hangzhou

The region ID of the instance. You can call the DescribeRegions operation to query the most recent region list.

RebuildNodeType String No FOLLOWER

The role of the secondary instance that you want to rebuild. Valid values:

  • FOLLOWER: secondary instance
  • LOG: logger instance

Response parameters

Parameter Type Example Description
MigrationId Integer 3298015

The serial number of the task in the rebuild task queue. When the serial number becomes 0, the system starts to rebuild the secondary instance.

RequestId String 355DA57C-8CC4-40AB-B3F8-B684BA32EB9E

The ID of the request.

TaskId Integer 208676661

The ID of the task.


Sample requests

&<Common request parameters>

Sample success responses

XML format


JSON format

    "MigrationId": 3298015,
    "RequestId": "355DA57C-8CC4-40AB-B3F8-B684BA32EB9E",
    "TaskId": 208676661

Error codes

HTTP status code Error code Error message Description
404 InsufficientResourceCapacity No host is available for the requested instance. The error message returned because no suitable hosts can be found due to insufficient resources in the dedicated cluster.

For a list of error codes, visit the API Error Center.