describe-listeners¶

Description¶

Describes the specified listeners or the listeners for the specified Application Load Balancer or Network 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 .

Synopsis¶

  describe-listeners
[--load-balancer-arn <value>]
[--listener-arns <value>]
[--page-size <value>]
[--cli-input-json | --cli-input-yaml]
[--starting-token <value>]
[--max-items <value>]
[--generate-cli-skeleton <value>]
[--cli-auto-prompt <value>]

Options¶

--load-balancer-arn (string)

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

--listener-arns (list)

The Amazon Resource Names (ARN) of the listeners.

(string)

Syntax:

"string" "string" ...

--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 .

--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 .

--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.

--cli-auto-prompt (boolean) Automatically prompt for CLI input parameters.

See ‘aws help’ for descriptions of global parameters.

Examples¶

To describe a listener

This example describes the specified listener.

Command:

aws elbv2 describe-listeners --listener-arns arn:aws:elasticloadbalancing:us-west-2:123456789012:listener/app/my-load-balancer/50dc6c495c0c9188/f2f7dc8efc522ab2

Output:

{
  "Listeners": [
      {
          "Port": 80,
          "Protocol": "HTTP",
          "DefaultActions": [
              {
                  "TargetGroupArn": "arn:aws:elasticloadbalancing:us-west-2:123456789012:targetgroup/my-targets/73e2d6bc24d8a067",
                  "Type": "forward"
              }
          ],
          "LoadBalancerArn": "arn:aws:elasticloadbalancing:us-west-2:123456789012:loadbalancer/app/my-load-balancer/50dc6c495c0c9188",
          "ListenerArn": "arn:aws:elasticloadbalancing:us-west-2:123456789012:listener/app/my-load-balancer/50dc6c495c0c9188/f2f7dc8efc522ab2"
      }
  ]
}

To describe the listeners for a load balancer

This example describe the listeners for the specified load balancer.

Command:

aws elbv2 describe-listeners --load-balancer-arn arn:aws:elasticloadbalancing:us-west-2:123456789012:loadbalancer/app/my-load-balancer/50dc6c495c0c9188

Output:

{
  "Listeners": [
      {
          "Port": 443,
          "Protocol": "HTTPS",
          "DefaultActions": [
              {
                  "TargetGroupArn": "arn:aws:elasticloadbalancing:us-west-2:123456789012:targetgroup/my-targets/73e2d6bc24d8a067",
                  "Type": "forward"
              }
          ],
          "SslPolicy": "ELBSecurityPolicy-2015-05",
          "Certificates": [
              {
                  "CertificateArn": "arn:aws:iam::123456789012:server-certificate/my-server-cert"
              }
          ],
          "LoadBalancerArn": "arn:aws:elasticloadbalancing:us-west-2:123456789012:loadbalancer/app/my-load-balancer/50dc6c495c0c9188",
          "ListenerArn": "arn:aws:elasticloadbalancing:us-west-2:123456789012:listener/app/my-load-balancer/50dc6c495c0c9188/0467ef3c8400ae65"
      },
      {
          "Port": 80,
          "Protocol": "HTTP",
          "DefaultActions": [
              {
                  "TargetGroupArn": "arn:aws:elasticloadbalancing:us-west-2:123456789012:targetgroup/my-targets/73e2d6bc24d8a067",
                  "Type": "forward"
              }
          ],
          "LoadBalancerArn": "arn:aws:elasticloadbalancing:us-west-2:123456789012:loadbalancer/app/my-load-balancer/50dc6c495c0c9188",
          "ListenerArn": "arn:aws:elasticloadbalancing:us-west-2:123456789012:listener/app/my-load-balancer/50dc6c495c0c9188/f2f7dc8efc522ab2"
      }
  ]
}

Output¶

Listeners -> (list)

Information about the listeners.

(structure)

Information about a listener.

ListenerArn -> (string)

The Amazon Resource Name (ARN) of the listener.

LoadBalancerArn -> (string)

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

Port -> (integer)

The port on which the load balancer is listening.

Protocol -> (string)

The protocol for connections from clients to the load balancer.

Certificates -> (list)

[HTTPS or TLS listener] The default certificate for the listener.

(structure)

Information about an SSL server certificate.

CertificateArn -> (string)

The Amazon Resource Name (ARN) of the certificate.

IsDefault -> (boolean)

Indicates whether the certificate is the default certificate. Do not set this value when specifying a certificate as an input. This value is not included in the output when describing a listener, but is included when describing listener certificates.

SslPolicy -> (string)

[HTTPS or TLS listener] The security policy that defines which protocols and ciphers are supported.

DefaultActions -> (list)

The default actions for the listener.

(structure)

Information about an action.

Type -> (string)

The type of action.

TargetGroupArn -> (string)

The Amazon Resource Name (ARN) of the target group. Specify only when Type is forward and you want to route to a single target group. To route to one or more target groups, use ForwardConfig instead.

AuthenticateOidcConfig -> (structure)

[HTTPS listeners] Information about an identity provider that is compliant with OpenID Connect (OIDC). Specify only when Type is authenticate-oidc .

Issuer -> (string)

The OIDC issuer identifier of the IdP. This must be a full URL, including the HTTPS protocol, the domain, and the path.

AuthorizationEndpoint -> (string)

The authorization endpoint of the IdP. This must be a full URL, including the HTTPS protocol, the domain, and the path.

TokenEndpoint -> (string)

The token endpoint of the IdP. This must be a full URL, including the HTTPS protocol, the domain, and the path.

UserInfoEndpoint -> (string)

The user info endpoint of the IdP. This must be a full URL, including the HTTPS protocol, the domain, and the path.

ClientId -> (string)

The OAuth 2.0 client identifier.

ClientSecret -> (string)

The OAuth 2.0 client secret. This parameter is required if you are creating a rule. If you are modifying a rule, you can omit this parameter if you set UseExistingClientSecret to true.

SessionCookieName -> (string)

The name of the cookie used to maintain session information. The default is AWSELBAuthSessionCookie.

Scope -> (string)

The set of user claims to be requested from the IdP. The default is openid .

To verify which scope values your IdP supports and how to separate multiple values, see the documentation for your IdP.

SessionTimeout -> (long)

The maximum duration of the authentication session, in seconds. The default is 604800 seconds (7 days).

AuthenticationRequestExtraParams -> (map)

The query parameters (up to 10) to include in the redirect request to the authorization endpoint.

key -> (string)

value -> (string)

OnUnauthenticatedRequest -> (string)

The behavior if the user is not authenticated. The following are possible values:

deny- Return an HTTP 401 Unauthorized error.

allow- Allow the request to be forwarded to the target.

authenticate- Redirect the request to the IdP authorization endpoint. This is the default value.

UseExistingClientSecret -> (boolean)

Indicates whether to use the existing client secret when modifying a rule. If you are creating a rule, you can omit this parameter or set it to false.

AuthenticateCognitoConfig -> (structure)

[HTTPS listeners] Information for using Amazon Cognito to authenticate users. Specify only when Type is authenticate-cognito .

UserPoolArn -> (string)

The Amazon Resource Name (ARN) of the Amazon Cognito user pool.

UserPoolClientId -> (string)

The ID of the Amazon Cognito user pool client.

UserPoolDomain -> (string)

The domain prefix or fully-qualified domain name of the Amazon Cognito user pool.

SessionCookieName -> (string)

The name of the cookie used to maintain session information. The default is AWSELBAuthSessionCookie.

Scope -> (string)

The set of user claims to be requested from the IdP. The default is openid .

To verify which scope values your IdP supports and how to separate multiple values, see the documentation for your IdP.

SessionTimeout -> (long)

The maximum duration of the authentication session, in seconds. The default is 604800 seconds (7 days).

AuthenticationRequestExtraParams -> (map)

The query parameters (up to 10) to include in the redirect request to the authorization endpoint.

key -> (string)

value -> (string)

OnUnauthenticatedRequest -> (string)

The behavior if the user is not authenticated. The following are possible values:

deny- Return an HTTP 401 Unauthorized error.

allow- Allow the request to be forwarded to the target.

authenticate- Redirect the request to the IdP authorization endpoint. This is the default value.

Order -> (integer)

The order for the action. This value is required for rules with multiple actions. The action with the lowest value for order is performed first. The last action to be performed must be one of the following types of actions: a forward , fixed-response , or redirect .

RedirectConfig -> (structure)

[Application Load Balancer] Information for creating a redirect action. Specify only when Type is redirect .

Protocol -> (string)

The protocol. You can specify HTTP, HTTPS, or #{protocol}. You can redirect HTTP to HTTP, HTTP to HTTPS, and HTTPS to HTTPS. You cannot redirect HTTPS to HTTP.

Port -> (string)

The port. You can specify a value from 1 to 65535 or #{port}.

Host -> (string)

The hostname. This component is not percent-encoded. The hostname can contain #{host}.

Path -> (string)

The absolute path, starting with the leading “/”. This component is not percent-encoded. The path can contain #{host}, #{path}, and #{port}.

Query -> (string)

The query parameters, URL-encoded when necessary, but not percent-encoded. Do not include the leading “?”, as it is automatically added. You can specify any of the reserved keywords.

StatusCode -> (string)

The HTTP redirect code. The redirect is either permanent (HTTP 301) or temporary (HTTP 302).

FixedResponseConfig -> (structure)

[Application Load Balancer] Information for creating an action that returns a custom HTTP response. Specify only when Type is fixed-response .

MessageBody -> (string)

The message.

StatusCode -> (string)

The HTTP response code (2XX, 4XX, or 5XX).

ContentType -> (string)

The content type.

Valid Values: text/plain | text/css | text/html | application/javascript | application/json

ForwardConfig -> (structure)

Information for creating an action that distributes requests among one or more target groups. For Network Load Balancers, you can specify a single target group. Specify only when Type is forward . If you specify both ForwardConfig and TargetGroupArn , you can specify only one target group using ForwardConfig and it must be the same target group specified in TargetGroupArn .

TargetGroups -> (list)

One or more target groups. For Network Load Balancers, you can specify a single target group.

(structure)

Information about how traffic will be distributed between multiple target groups in a forward rule.

TargetGroupArn -> (string)

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

Weight -> (integer)

The weight. The range is 0 to 999.

TargetGroupStickinessConfig -> (structure)

The target group stickiness for the rule.

Enabled -> (boolean)

Indicates whether target group stickiness is enabled.

DurationSeconds -> (integer)

The time period, in seconds, during which requests from a client should be routed to the same target group. The range is 1-604800 seconds (7 days).

AlpnPolicy -> (list)

[TLS listener] The name of the Application-Layer Protocol Negotiation (ALPN) policy.

(string)

NextMarker -> (string)

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

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