GET

/#Action=AttachInstances

http://autoscaling.{region}.amazonaws.com/#Action=AttachInstances

Attaches one or more EC2 instances to the specified Auto Scaling group. When you attach instances, Amazon EC2 Auto Scaling increases the desired capacity of the group by the number of instances being attached. If the number of instances being attached plus the desired capacity of the group exceeds the maximum size of the group, the operation fails. If there is a Classic Load Balancer attached to your Auto Scaling group, the instances are also registered with the load balancer. If there are target groups attached to your Auto Scaling group, the instances are also registered with the target groups. For more information, see <a href="https://docs.aws.amazon.com/autoscaling/ec2/userguide/attach-instance-asg.html">Attach EC2 instances to your Auto Scaling group</a> in the Amazon EC2 Auto Scaling User Guide.

Access Token Required: API Key

Query Params

InstanceIdsarray

The IDs of the instances. You can specify up to 20 instances.

AutoScalingGroupNamestringrequired

The name of the Auto Scaling group.

Actionstringrequired

Allowed:

Versionstringrequired

Allowed:

Responses

{
  "success": true,
  "data": {
    "id": "abc123",
    "created_at": "2025-01-01T00:00:00Z"
  }
}

{
  "success": false,
  "error": {
    "code": "VALIDATION_ERROR",
    "message": "Invalid request parameters"
  }
}

Language

CredentialsAPI KEY

API Key

Enter token below to save for later

cURL Request

1curl --request GET \
2     --url 'http://autoscaling.{region}.amazonaws.com/#Action=AttachInstances' \
3     --header 'accept: application/json' \
4     --header 'content-type: application/json'

Response

1{
2  "success": true,
3  "data": {
4    "id": "abc123",
5    "created_at": "2025-01-01T00:00:00Z"
6  }
7}