describe-load-balancer-target-groups¶

Description¶

Gets information about the load balancer target groups for the specified Auto Scaling group.

To determine the availability of registered instances, use the State element in the response. When you attach a target group to an Auto Scaling group, the initial State value is Adding . The state transitions to Added after all Auto Scaling instances are registered with the target group. If Elastic Load Balancing health checks are enabled for the Auto Scaling group, the state transitions to InService after at least one Auto Scaling instance passes the health check. When the target group is in the InService state, Amazon EC2 Auto Scaling can terminate and replace any instances that are reported as unhealthy. If no registered instances pass the health checks, the target group doesn’t enter the InService state.

Target groups also have an InService state if you attach them in the CreateAutoScalingGroup API call. If your target group state is InService , but it is not working properly, check the scaling activities by calling DescribeScalingActivities and take any corrective actions necessary.

For help with failed health checks, see Troubleshooting Amazon EC2 Auto Scaling: Health checks in the Amazon EC2 Auto Scaling User Guide . For more information, see Elastic Load Balancing and Amazon EC2 Auto Scaling in the Amazon EC2 Auto Scaling User Guide .

Synopsis¶

  describe-load-balancer-target-groups
--auto-scaling-group-name <value>
[--cli-input-json | --cli-input-yaml]
[--starting-token <value>]
[--page-size <value>]
[--max-items <value>]
[--generate-cli-skeleton <value>]

Options¶

--auto-scaling-group-name (string)

The name of the Auto Scaling group.

--cli-input-json | --cli-input-yaml (string) Reads arguments from the JSON string provided. The JSON string follows the format provided by --generate-cli-skeleton. If other arguments are provided on the command line, those values will override the JSON-provided values. It is not possible to pass arbitrary binary values using a JSON-provided value as the string will be taken literally. This may not be specified along with --cli-input-yaml.

--starting-token (string)

A token to specify where to start paginating. This is the NextToken from a previously truncated response.

For usage examples, see Pagination in the AWS Command Line Interface User Guide .

--page-size (integer)

The size of each page to get in the AWS service call. This does not affect the number of items returned in the command’s output. Setting a smaller page size results in more calls to the AWS service, retrieving fewer items in each call. This can help prevent the AWS service calls from timing out.

For usage examples, see Pagination in the AWS Command Line Interface User Guide .

--max-items (integer)

The total number of items to return in the command’s output. If the total number of items available is more than the value specified, a NextToken is provided in the command’s output. To resume pagination, provide the NextToken value in the starting-token argument of a subsequent command. Do not use the NextToken response element directly outside of the AWS CLI.

For usage examples, see Pagination in the AWS Command Line Interface User Guide .

--generate-cli-skeleton (string) Prints a JSON skeleton to standard output without sending an API request. If provided with no value or the value input, prints a sample input JSON that can be used as an argument for --cli-input-json. Similarly, if provided yaml-input it will print a sample input YAML that can be used with --cli-input-yaml. If provided with the value output, it validates the command inputs and returns a sample output JSON for that command.

See ‘aws help’ for descriptions of global parameters.

Examples¶

To describe the load balancer target groups for an Auto Scaling group

This example describes the load balancer target groups attached to the specified Auto Scaling group.

aws autoscaling describe-load-balancer-target-groups \
    --auto-scaling-group-name my-asg

Output:

{
    "LoadBalancerTargetGroups": [
        {
            "LoadBalancerTargetGroupARN": "arn:aws:elasticloadbalancing:us-west-2:123456789012:targetgroup/my-targets/73e2d6bc24d8a067",
            "State": "Added"
        }
    ]
}

Output¶

LoadBalancerTargetGroups -> (list)

Information about the target groups.

(structure)

Describes the state of a target group.

LoadBalancerTargetGroupARN -> (string)

The Amazon Resource Name (ARN) of the target group.

State -> (string)

The state of the target group.

Adding - The Auto Scaling instances are being registered with the target group.

Added - All Auto Scaling instances are registered with the target group.

InService - At least one Auto Scaling instance passed an ELB health check.

Removing - The Auto Scaling instances are being deregistered from the target group. If connection draining is enabled, Elastic Load Balancing waits for in-flight requests to complete before deregistering the instances.

Removed - All Auto Scaling instances are deregistered from the target group.

NextToken -> (string)

A string that indicates that the response contains more items than can be returned in a single response. To receive additional items, specify this string for the NextToken value when requesting the next set of items. This value is null when there are no more items to return.

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