AttachInstances

Last Updated At: 2026-08-02 00:05:29

1. Interface Description

Interface request domain name: as.api3.convergecloud.com.

This API (AttachInstances) is used to add CVM instances to a scaling group.

Default interface request rate limit: 20 times per second.

Interface update time: 2019-10-31 18:26:52.

The interface only verifies the signature but does not authenticate.

2. Input Parameters

The following list of request parameters only lists interface request parameters and some public parameters, For a complete list of public parameters see public request parameters.

Parameter name Required Allow NULL Type Description
Action Yes No String Public parameter, The value of this interface: AttachInstances
Version Yes No String Public parameter, The value of this interface: 2018-04-19
Region No No String Public parameter,Regional information A list of supported geographies is available through the DescribeRegions interface
AutoScalingGroupId Yes No String ID of the scaling group.
Example: asg-boz1qhnk
InstanceIds Yes No Array of String IDs of CVM instances.
Example: ["ins-cri8d02t\n","ins-osckfnm7\n"]

3. Output Parameters

Parameter name Type Description
ActivityId String ID of the scaling activity.
Example: asa-q59zikez
RequestId String Unique request id, Each request will return. The RequestId of the request needs to be provided when locating the problem.

4. Error Code

The following lists only the error codes related to the interface business logic, For other error codes, see public ErrorCode.

Error Code Description
ResourceUnavailable.AutoScalingGroupInActivity The auto scaling group is active.
ResourceUnavailable.InstancesAlreadyInAutoScalingGroup The instance already exists in the auto scaling group.
ResourceUnavailable.CvmVpcInconsistent The instance and the auto scaling group are in different VPCs.
ResourceNotFound.InstancesNotFound The specified instance does not exist.
ResourceNotFound.AutoScalingGroupIdNotFound The scaling group does not exist.
ResourceInsufficient.AutoScalingGroupAboveMaxSize The maximum number of instances in the auto scaling group is exceeded.
InvalidParameterValue.LimitExceeded The value exceeds the limit.
InternalError Internal error.