[ aws . elbv2 ]

describe-target-group-attributes

Description

Describes the attributes for the specified target group.

For more information, see the following:

• Target group attributes in the Application Load Balancers Guide

• Target group attributes in the Network Load Balancers Guide

• Target group attributes in the Gateway Load Balancers Guide

See also: AWS API Documentation

See ‘aws help’ for descriptions of global parameters.

Synopsis

  describe-target-group-attributes
--target-group-arn <value>
[--cli-input-json | --cli-input-yaml]
[--generate-cli-skeleton <value>]

Options

--target-group-arn (string)

The Amazon Resource Name (ARN) of the target 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.

--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 target group attributes

The following describe-target-group-attributes example displays the attributes of the specified target group.

aws elbv2 describe-target-group-attributes \
    --target-group-arn arn:aws:elasticloadbalancing:us-west-2:123456789012:targetgroup/my-targets/73e2d6bc24d8a067

The output includes the attributes if the protocol is HTTP or HTTPS and the target type is instance or ip.

{
    "Attributes": [
        {
            "Value": "false",
            "Key": "stickiness.enabled"
        },
        {
            "Value": "300",
            "Key": "deregistration_delay.timeout_seconds"
        },
        {
            "Value": "lb_cookie",
            "Key": "stickiness.type"
        },
        {
            "Value": "86400",
            "Key": "stickiness.lb_cookie.duration_seconds"
        },
        {
            "Value": "0",
            "Key": "slow_start.duration_seconds"
        }
    ]
}

The following output includes the attributes if the protocol is HTTP or HTTPS and the target type is lambda.

{
    "Attributes": [
        {
            "Value": "false",
            "Key": "lambda.multi_value_headers.enabled"
        }
    ]
}

The following output includes the attributes if the protocol is TCP, TLS, UDP, or TCP_UDP.

{
    "Attributes": [
        {
            "Value": "false",
            "Key": "proxy_protocol_v2.enabled"
        },
        {
            "Value": "300",
            "Key": "deregistration_delay.timeout_seconds"
        }
    ]
}

Output

Attributes -> (list)

Information about the target group attributes

(structure)

Information about a target group attribute.

Key -> (string)

The name of the attribute.

The following attribute is supported by all load balancers:

• deregistration_delay.timeout_seconds - The amount of time, in seconds, for Elastic Load Balancing to wait before changing the state of a deregistering target from draining to unused . The range is 0-3600 seconds. The default value is 300 seconds. If the target is a Lambda function, this attribute is not supported.

The following attributes are supported by both Application Load Balancers and Network Load Balancers:

• stickiness.enabled - Indicates whether sticky sessions are enabled. The value is true or false . The default is false .

• stickiness.type - The type of sticky sessions. The possible values are lb_cookie and app_cookie for Application Load Balancers or source_ip for Network Load Balancers.

The following attributes are supported only if the load balancer is an Application Load Balancer and the target is an instance or an IP address:

• load_balancing.algorithm.type - The load balancing algorithm determines how the load balancer selects targets when routing requests. The value is round_robin or least_outstanding_requests . The default is round_robin .

• slow_start.duration_seconds - The time period, in seconds, during which a newly registered target receives an increasing share of the traffic to the target group. After this time period ends, the target receives its full share of traffic. The range is 30-900 seconds (15 minutes). The default is 0 seconds (disabled).

• stickiness.app_cookie.cookie_name - Indicates the name of the application-based cookie. Names that start with the following names are not allowed: AWSALB , AWSALBAPP , and AWSALBTG . They’re reserved for use by the load balancer.

• stickiness.app_cookie.duration_seconds - The time period, in seconds, during which requests from a client should be routed to the same target. After this time period expires, the application-based cookie is considered stale. The range is 1 second to 1 week (604800 seconds). The default value is 1 day (86400 seconds).

• stickiness.lb_cookie.duration_seconds - The time period, in seconds, during which requests from a client should be routed to the same target. After this time period expires, the load balancer-generated cookie is considered stale. The range is 1 second to 1 week (604800 seconds). The default value is 1 day (86400 seconds).

The following attribute is supported only if the load balancer is an Application Load Balancer and the target is a Lambda function:

• lambda.multi_value_headers.enabled - Indicates whether the request and response headers that are exchanged between the load balancer and the Lambda function include arrays of values or strings. The value is true or false . The default is false . If the value is false and the request contains a duplicate header field name or query parameter key, the load balancer uses the last value sent by the client.

The following attributes are supported only by Network Load Balancers:

• deregistration_delay.connection_termination.enabled - Indicates whether the load balancer terminates connections at the end of the deregistration timeout. The value is true or false . The default is false .

• preserve_client_ip.enabled - Indicates whether client IP preservation is enabled. The value is true or false . The default is disabled if the target group type is IP address and the target group protocol is TCP or TLS. Otherwise, the default is enabled. Client IP preservation cannot be disabled for UDP and TCP_UDP target groups.

• proxy_protocol_v2.enabled - Indicates whether Proxy Protocol version 2 is enabled. The value is true or false . The default is false .

Value -> (string)

The value of the attribute.