DetachDBInstances - Auto Scaling - Alibaba Cloud Documentation Center

Detaches one or more ApsaraDB RDS instances from a scaling group. If you want to decrease the number of ApsaraDB RDS instances attached to your scaling group, you can call the DetachDBInstance operation. This operation liberates ApsaraDB RDS instances from your scaling group, thereby significantly boosting the agility and efficiency in managing and allocating your resources.

Debugging

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	DetachDBInstances	The operation that you want to perform. Set the value to DetachDBInstances.
ScalingGroupId	String	Yes	asg-bp1igpak5ft1flyp****	The ID of the scaling group.
ForceDetach	Boolean	No	false	Specifies whether to remove the private IP addresses of the existing instances in the scaling group from the IP address whitelist of the ApsaraDB RDS instance marked for detachment. Valid values: true false Default value: false.
ClientToken	String	No	123e4567-e89b-12d3-a456-42665544****	The client token that is used to ensure the idempotence of the request. You can use the client to generate the token, but you must make sure that the token is unique among different requests. The token can contain only ASCII characters and cannot exceed 64 characters in length. For more information, see Ensure idempotence.
DBInstance.N	String	No	rm-bp12cy3****	The ID of ApsaraDB RDS instance N that you want to detach from your scaling group. You can detach up to five ApsaraDB RDS instances from a scaling group in each call.
RegionId	String	No	cn-qingdao	The region ID of the scaling group.
RemoveSecurityGroup	Boolean	No	false	Specifies whether to remove the security group whitelist of the ApsaraDB RDS instance marked for detachment. This parameter takes effect only if you set `AttachMode` to `SecurityGroup`. Valid values: true false Default value: false.

Response parameters

Parameter	Type	Example	Description
RequestId	String	473469C7-AA6F-4DC5-B3DB-A3DC0DE3****	The request ID.

Examples

Sample requests

http(s)://ess.aliyuncs.com/?Action=DetachDBInstances
&ScalingGroupId=asg-bp1igpak5ft1flyp****
&ForceDetach=false
&ClientToken=123e4567-e89b-12d3-a456-42665544****
&DBInstance=["rm-bp12cy3****"]
&RegionId=cn-qingdao
&RemoveSecurityGroup=false
&<Common request parameters>

Sample success responses

XML format

HTTP/1.1 200 OK
Content-Type:application/xml

<DetachDBInstancesResponse>
    <RequestId>473469C7-AA6F-4DC5-B3DB-A3DC0DE3****</RequestId>
</DetachDBInstancesResponse>

JSON format

HTTP/1.1 200 OK
Content-Type:application/json

{
  "RequestId" : "473469C7-AA6F-4DC5-B3DB-A3DC0DE3****"
}

Error codes

For a list of error codes, see Service error codes.

HTTP status code	Error code	Error message	Description
404	InvalidScalingGroupId.NotFound	The specified scaling group does not exist.	The specified scaling group does not exist within the Alibaba Cloud account.
400	InvalidDBInstanceId.NotFound	DB instance "%s" does not exist.	The specified ApsaraDB RDS instance does not exist.