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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 Attach EC2 instances to your Auto Scaling group in the Amazon EC2 Auto Scaling User Guide.
For .NET Core this operation is only available in asynchronous form. Please refer to AttachInstancesAsync.
Namespace: Amazon.AutoScaling
Assembly: AWSSDK.AutoScaling.dll
Version: 3.x.y.z
public abstract AttachInstancesResponse AttachInstances( AttachInstancesRequest request )
Container for the necessary parameters to execute the AttachInstances service method.
| Exception | Condition |
|---|---|
| ResourceContentionException | You already have a pending update to an Amazon EC2 Auto Scaling resource (for example, an Auto Scaling group, instance, or load balancer). |
| ServiceLinkedRoleFailureException | The service-linked role is not yet ready for use. |
This example attaches the specified instance to the specified Auto Scaling group.
var client = new AmazonAutoScalingClient();
var response = client.AttachInstances(new AttachInstancesRequest
{
AutoScalingGroupName = "my-auto-scaling-group",
InstanceIds = new List<string> {
"i-93633f9b"
}
});
.NET Framework:
Supported in: 4.5, 4.0, 3.5