Note
This API operation is superseded by https://docs.aws.amazon.com/autoscaling/ec2/APIReference/API_AttachTrafficSources.html, which
can attach multiple traffic sources types. We recommend using
AttachTrafficSources to simplify how you manage traffic sources.
However, we continue to support AttachLoadBalancers. You can use both
the original AttachLoadBalancers API operation and
AttachTrafficSources on the same Auto Scaling group.
Attaches one or more Classic Load Balancers to the specified Auto Scaling group. Amazon EC2 Auto Scaling registers the running instances with these Classic Load Balancers.
To describe the load balancers for an Auto Scaling group, call the DescribeLoadBalancers API. To detach a load balancer from the Auto Scaling group, call the DetachLoadBalancers API.
This operation is additive and does not detach existing Classic Load Balancers or target groups from the Auto Scaling group.
For more information, see Use Elastic Load Balancing to distribute traffic across the instances in your Auto Scaling group in the Amazon EC2 Auto Scaling User Guide.
Request Parameters
For information about the parameters that are common to all actions, see Common Parameters.
- AutoScalingGroupName
-
The name of the Auto Scaling group.
Type: String
Length Constraints: Minimum length of 1. Maximum length of 255.
Pattern:
[\u0020-\uD7FF\uE000-\uFFFD\uD800\uDC00-\uDBFF\uDFFF\r\n\t]*Required: Yes
- LoadBalancerNames.member.N
-
The names of the load balancers. You can specify up to 10 load balancers.
Type: Array of strings
Length Constraints: Minimum length of 1. Maximum length of 255.
Pattern:
[\u0020-\uD7FF\uE000-\uFFFD\uD800\uDC00-\uDBFF\uDFFF\r\n\t]*Required: Yes
Errors
For information about the errors that are common to all actions, see Common Errors.
- ResourceContention
-
You already have a pending update to an Amazon EC2 Auto Scaling resource (for example, an Auto Scaling group, instance, or load balancer).
HTTP Status Code: 500
- ServiceLinkedRoleFailure
-
The service-linked role is not yet ready for use.
HTTP Status Code: 500
Examples
Example
This example illustrates one usage of AttachLoadBalancers.
Sample Request
https://autoscaling.amazonaws.com/?Action=AttachLoadBalancers
&AutoScalingGroupName=my-asg
&LoadBalancerNames.member.1=my-lb
&Version=2011-01-01
&AUTHPARAMS See Also
For more information about using this API in one of the language-specific AWS SDKs, see the following:
