DetachVServerGroups - Auto Scaling - Alibaba Cloud Documentation Center

Detaches vServer groups from a scaling group. Auto Scaling supports the attachment of load balancers to scaling groups to improve service performance. If the load balancer currently attached to your scaling group is no longer needed to distribute the access traffic to the instances in your scaling group, you can call the DetachVServerGroups operation to detach one or more vServer groups of this load balancer from the scaling group.

Operation description

When you call the DetachVServerGroups operation, you must use the following parameters to specify the vServer groups that you want to detach from your scaling group:
- LoadBalancerId: the ID of the load balancer
- VServerGroupId: the ID of the vServer group
- Port: the port number of the vServer group
When the vServer group specified by the request parameters matches that attached to your scaling group, this operation yields a favorable result. Otherwise, the request is ignored and no error is reported.
Before you call this operation, you must make sure that the load balancer has ceased routing the access traffic to the instances in the scaling group. Failure to do so may lead to service requests being dropped or lost during the detachment process.

Debugging

OpenAPI Explorer automatically calculates the signature value. For your convenience, we recommend that you call this operation in OpenAPI Explorer.

Debug

Authorization information

There is currently no authorization information disclosed in the API.

Request parameters

Parameter	Type	Required	Description	Example
RegionId	string	Yes	The region ID of the scaling group. Examples: cn-hangzhou and cn-shanghai.	cn-hangzhou
ScalingGroupId	string	Yes	The ID of the scaling group.	asg-bp1fo0dbtsbmqa9h****
ClientToken	string	No	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.	123e4567-e89b-12d3-a456-42665544****
ForceDetach	boolean	No	Specifies whether to remove the existing instances in the scaling group from the vServer group marked for detachment. true: If you set this parameter to `true`, the detachment of the load balancer from the scaling group entails automatic removal of the existing instances in the scaling group from the corresponding vServer group. false: If you set this parameter to `false`, the detachment of the load balancer from the scaling group does not entail automatic removal of the existing instances in the scaling group from the corresponding vServer group. Default value: false.	false
VServerGroups	object []	Yes	The collection of information about the vServer groups marked for detachment.
VServerGroupAttributes	object []	No	The attributes of the backend vServer group.
VServerGroupId	string	No	The ID of the backend vServer group.	rsp-bp1jp1rge****
Port	integer	No	The port number that Auto Scaling employs to incorporate instances into the vServer group. Valid values: 1 to 65535.	22
LoadBalancerId	string	No	The ID of the load balancer to which the vServer group belongs. Note You can detach vServer groups of up to five load balancers from a scaling group in one call.	lb-bp1p90y3ya9h8s62d****

Response parameters

Parameter	Type	Description	Example
	object
RequestId	string	The ID of the request.	473469C7-AA6F-4DC5-B3DB-A3DC0DE3****

Examples

Sample success responses

JSONformat

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

Error codes

For a list of error codes, visit the Service error codes.

Change history

Change time	Summary of changes	Operation

No change history