DescribeListeners

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Describes the specified listeners or the listeners for the specified Application Load Balancer, Network Load Balancer, or Gateway Load Balancer. You must specify either a load balancer or one or more listeners.

For an HTTPS or TLS listener, the output includes the default certificate for the listener. To describe the certificate list for the listener, use DescribeListenerCertificates.

Request Parameters

For information about the parameters that are common to all actions, see Common Parameters.

ListenerArns.member.N

The Amazon Resource Names (ARN) of the listeners.

Type: Array of strings

Required: No

LoadBalancerArn

The Amazon Resource Name (ARN) of the load balancer.

Type: String

Required: No

Marker

The marker for the next set of results. (You received this marker from a previous call.)

Type: String

Required: No

PageSize

The maximum number of results to return with this call.

Type: Integer

Valid Range: Minimum value of 1. Maximum value of 400.

Required: No

Response Elements

The following elements are returned by the service.

Listeners.member.N

Information about the listeners.

Type: Array of Listener objects

NextMarker

If there are additional results, this is the marker for the next set of results. Otherwise, this is null.

Type: String

Errors

For information about the errors that are common to all actions, see Common Errors.

ListenerNotFound

The specified listener does not exist.

HTTP Status Code: 400

LoadBalancerNotFound

The specified load balancer does not exist.

HTTP Status Code: 400

UnsupportedProtocol

The specified protocol is not supported.

HTTP Status Code: 400

Examples

Describe an HTTP listener

This example describes the specified HTTP listener.

Sample Request

https://elasticloadbalancing.amazonaws.com/?Action=DescribeListeners
&ListenerArns.member.1=arn:aws:elasticloadbalancing:us-west-2:123456789012:listener/app/my-load-balancer/50dc6c495c0c9188/f2f7dc8efc522ab2
&Version=2015-12-01
&AUTHPARAMS

Sample Response

<DescribeListenersResponse xmlns="http://elasticloadbalancing.amazonaws.com/doc/2015-12-01/">
  <DescribeListenersResult> 
    <Listeners> 
      <member> 
        <LoadBalancerArn>arn:aws:elasticloadbalancing:us-west-2:123456789012:loadbalancer/app/my-load-balancer/50dc6c495c0c9188</LoadBalancerArn> 
        <Protocol>HTTP</Protocol> 
        <Port>80</Port> 
        <ListenerArn>arn:aws:elasticloadbalancing:us-west-2:123456789012:listener/app/my-load-balancer/50dc6c495c0c9188/f2f7dc8efc522ab2</ListenerArn> 
        <DefaultActions> 
          <member> 
            <Type>forward</Type> 
            <TargetGroupArn>arn:aws:elasticloadbalancing:us-west-2:123456789012:targetgroup/my-targets/73e2d6bc24d8a067</TargetGroupArn> 
          </member> 
        </DefaultActions> 
      </member> 
    </Listeners> 
  </DescribeListenersResult> 
  <ResponseMetadata> 
    <RequestId>18e470d3-f39c-11e5-a53c-67205c0d10fd</RequestId> 
  </ResponseMetadata>
</DescribeListenersResponse>

Describe an HTTPS listener

This example describes the specified HTTPS listener.

Sample Request

https://elasticloadbalancing.amazonaws.com/?Action=DescribeListeners
&ListenerArns.member.1=arn:aws:elasticloadbalancing:us-west-2:123456789012:listener/app/my-load-balancer/50dc6c495c0c9188/f2f7dc8efc522ab2
&Version=2015-12-01
&AUTHPARAMS

Sample Response

<DescribeListenersResponse xmlns="http://elasticloadbalancing.amazonaws.com/doc/2015-12-01/">
  <DescribeListenersResult> 
    <Listeners> 
      <member> 
        <Port>443</Port> 
        <Protocol>HTTPS</Protocol> 
        <LoadBalancerArn>arn:aws:elasticloadbalancing:us-west-2:123456789012:loadbalancer/app/my-load-balancer/50dc6c495c0c9188</LoadBalancerArn> 
        <ListenerArn>arn:aws:elasticloadbalancing:us-west-2:123456789012:listener/app/my-load-balancer/50dc6c495c0c9188/f2f7dc8efc522ab2</ListenerArn> 
        <DefaultActions> 
          <member> 
            <Type>forward</Type> 
            <TargetGroupArn>arn:aws:elasticloadbalancing:us-west-2:123456789012:targetgroup/my-targets/73e2d6bc24d8a067</TargetGroupArn> 
          </member> 
        </DefaultActions>
        <SslPolicy>ELBSecurityPolicy-2016-08</SslPolicy>
        <Certificates>
          <member> 
            <CertificateArn>arn:aws:acm:us-west-2:123456789012:certificate/68c11a12-39de-44dd-b329-fe64aEXAMPLE</CertificateArn>
          </member> 
        </Certificates>
      </member> 
    </Listeners> 
  </DescribeListenersResult> 
  <ResponseMetadata> 
    <RequestId>18e470d3-f39c-11e5-a53c-67205c0d10fd</RequestId> 
  </ResponseMetadata>
</DescribeListenersResponse>

Describe the listeners for a load balancer

This example describe the listeners for the specified load balancer.

Sample Request

https://elasticloadbalancing.amazonaws.com/?Action=DescribeListeners
&LoadBalancerArn=arn:aws:elasticloadbalancing:us-west-2:123456789012:listener/app/my-load-balancer/50dc6c495c0c9188/f2f7dc8efc522ab2
&Version=2015-12-01
&AUTHPARAMS

Sample Response

<DescribeLoadBalancersResponse xmlns="http://elasticloadbalancing.amazonaws.com/doc/2015-12-01/">
  <DescribeListenersResult> 
    <Listeners> 
      <member> 
        <LoadBalancerArn>arn:aws:elasticloadbalancing:us-west-2:123456789012:loadbalancer/app/my-load-balancer/50dc6c495c0c9188</LoadBalancerArn> 
        <Protocol>HTTPS</Protocol> 
        <Certificates> 
          <member> 
            <CertificateArn>arn:aws:iam::123456789012:server-certificate/my-server-cert</CertificateArn> 
          </member> 
        </Certificates> 
        <Port>443</Port> 
        <SslPolicy>ELBSecurityPolicy-2016-08</SslPolicy> 
        <ListenerArn>arn:aws:elasticloadbalancing:us-west-2:123456789012:listener/app/my-load-balancer/50dc6c495c0c9188/0467ef3c8400ae65</ListenerArn> 
        <DefaultActions> 
          <member> 
            <Type>forward</Type> 
            <TargetGroupArn>arn:aws:elasticloadbalancing:us-west-2:123456789012:targetgroup/my-targets/73e2d6bc24d8a067</TargetGroupArn> 
          </member> 
        </DefaultActions> 
      </member> 
      <member> 
        <LoadBalancerArn>arn:aws:elasticloadbalancing:us-west-2:123456789012:loadbalancer/app/my-load-balancer/50dc6c495c0c9188</LoadBalancerArn> 
        <Protocol>HTTP</Protocol> 
        <Port>80</Port> 
        <ListenerArn>arn:aws:elasticloadbalancing:us-west-2:123456789012:listener/app/my-load-balancer/50dc6c495c0c9188/f2f7dc8efc522ab2</ListenerArn> 
        <DefaultActions> 
          <member> 
            <Type>forward</Type> 
            <TargetGroupArn>arn:aws:elasticloadbalancing:us-west-2:123456789012:targetgroup/my-targets/73e2d6bc24d8a067</TargetGroupArn> 
          </member> 
        </DefaultActions> 
      </member> 
    </Listeners> 
  </DescribeListenersResult> 
  <ResponseMetadata> 
    <RequestId>65a3a7ea-f39c-11e5-b543-9f2c3fbb9bee</RequestId> 
  </ResponseMetadata>
</DescribeLoadBalancersResponse>

See Also

For more information about using this API in one of the language-specific AWS SDKs, see the following:

• AWS Command Line Interface

• AWS SDK for .NET

• AWS SDK for C++

• AWS SDK for Go v2

• AWS SDK for Java V2

• AWS SDK for JavaScript V3

• AWS SDK for PHP V3

• AWS SDK for Python

• AWS SDK for Ruby V3