modify-target-group¶

Description¶

Modifies the health checks used when evaluating the health state of the targets in the specified target group.

If the protocol of the target group is TCP, TLS, UDP, or TCP_UDP, you can’t modify the health check protocol, interval, timeout, or success codes.

Synopsis¶

  modify-target-group
--target-group-arn <value>
[--health-check-protocol <value>]
[--health-check-port <value>]
[--health-check-path <value>]
[--health-check-enabled | --no-health-check-enabled]
[--health-check-interval-seconds <value>]
[--health-check-timeout-seconds <value>]
[--healthy-threshold-count <value>]
[--unhealthy-threshold-count <value>]
[--matcher <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.

--health-check-protocol (string)

The protocol the load balancer uses when performing health checks on targets. For Application Load Balancers, the default is HTTP. For Network Load Balancers and Gateway Load Balancers, the default is TCP. The TCP protocol is not supported for health checks if the protocol of the target group is HTTP or HTTPS. It is supported for health checks only if the protocol of the target group is TCP, TLS, UDP, or TCP_UDP. The GENEVE, TLS, UDP, and TCP_UDP protocols are not supported for health checks.

Possible values:

HTTP

HTTPS

TCP

TLS

UDP

TCP_UDP

GENEVE

--health-check-port (string)

The port the load balancer uses when performing health checks on targets.

--health-check-path (string)

[HTTP/HTTPS health checks] The destination for health checks on the targets.

[HTTP1 or HTTP2 protocol version] The ping path. The default is /.

[GRPC protocol version] The path of a custom health check method with the format /package.service/method. The default is /Amazon Web Services.ALB/healthcheck.

--health-check-enabled | --no-health-check-enabled (boolean)

Indicates whether health checks are enabled.

--health-check-interval-seconds (integer)

The approximate amount of time, in seconds, between health checks of an individual target. For TCP health checks, the supported values are 10 or 30 seconds.

--health-check-timeout-seconds (integer)

[HTTP/HTTPS health checks] The amount of time, in seconds, during which no response means a failed health check.

--healthy-threshold-count (integer)

The number of consecutive health checks successes required before considering an unhealthy target healthy.

--unhealthy-threshold-count (integer)

The number of consecutive health check failures required before considering the target unhealthy. For target groups with a protocol of TCP or TLS, this value must be the same as the healthy threshold count.

--matcher (structure)

[HTTP/HTTPS health checks] The HTTP or gRPC codes to use when checking for a successful response from a target.

HttpCode -> (string)

For Application Load Balancers, you can specify values between 200 and 499, and the default value is 200. You can specify multiple values (for example, “200,202”) or a range of values (for example, “200-299”).

For Network Load Balancers and Gateway Load Balancers, this must be “200–399”.

Note that when using shorthand syntax, some values such as commas need to be escaped.

GrpcCode -> (string)

You can specify values between 0 and 99. You can specify multiple values (for example, “0,1”) or a range of values (for example, “0-5”). The default value is 12.

Shorthand Syntax:

HttpCode=string,GrpcCode=string

JSON Syntax:

{
  "HttpCode": "string",
  "GrpcCode": "string"
}

--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. The generated JSON skeleton is not stable between versions of the AWS CLI and there are no backwards compatibility guarantees in the JSON skeleton generated.

See ‘aws help’ for descriptions of global parameters.

Examples¶

Note

To use the following examples, you must have the AWS CLI installed and configured. See the Getting started guide in the AWS CLI User Guide for more information.

Unless otherwise stated, all examples have unix-like quotation rules. These examples will need to be adapted to your terminal’s quoting rules. See Using quotation marks with strings in the AWS CLI User Guide .

To modify the health check configuration for a target group

This example changes the configuration of the health checks used to evaluate the health of the targets for the specified target group.

Command:

aws elbv2 modify-target-group --target-group-arn arn:aws:elasticloadbalancing:us-west-2:123456789012:targetgroup/my-https-targets/2453ed029918f21f --health-check-protocol HTTPS --health-check-port 443

Output:

{
  "TargetGroups": [
      {
          "HealthCheckIntervalSeconds": 30,
          "VpcId": "vpc-3ac0fb5f",
          "Protocol": "HTTPS",
          "HealthCheckTimeoutSeconds": 5,
          "HealthCheckProtocol": "HTTPS",
          "LoadBalancerArns": [
              "arn:aws:elasticloadbalancing:us-west-2:123456789012:loadbalancer/app/my-load-balancer/50dc6c495c0c9188"
          ],
          "UnhealthyThresholdCount": 2,
          "HealthyThresholdCount": 5,
          "TargetGroupArn": "arn:aws:elasticloadbalancing:us-west-2:123456789012:targetgroup/my-https-targets/2453ed029918f21f",
          "Matcher": {
              "HttpCode": "200"
          },
          "HealthCheckPort": "443",
          "Port": 443,
          "TargetGroupName": "my-https-targets"
      }
  ]
}

Output¶

TargetGroups -> (list)

Information about the modified target group.

(structure)

Information about a target group.

TargetGroupArn -> (string)

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

TargetGroupName -> (string)

The name of the target group.

Protocol -> (string)

The protocol to use for routing traffic to the targets.

Port -> (integer)

The port on which the targets are listening. Not used if the target is a Lambda function.

VpcId -> (string)

The ID of the VPC for the targets.

HealthCheckProtocol -> (string)

The protocol to use to connect with the target. The GENEVE, TLS, UDP, and TCP_UDP protocols are not supported for health checks.

HealthCheckPort -> (string)

The port to use to connect with the target.

HealthCheckEnabled -> (boolean)

Indicates whether health checks are enabled.

HealthCheckIntervalSeconds -> (integer)

The approximate amount of time, in seconds, between health checks of an individual target.

HealthCheckTimeoutSeconds -> (integer)

The amount of time, in seconds, during which no response means a failed health check.

HealthyThresholdCount -> (integer)

The number of consecutive health checks successes required before considering an unhealthy target healthy.

UnhealthyThresholdCount -> (integer)

The number of consecutive health check failures required before considering the target unhealthy.

HealthCheckPath -> (string)

The destination for health checks on the targets.

Matcher -> (structure)

The HTTP or gRPC codes to use when checking for a successful response from a target.

HttpCode -> (string)

For Application Load Balancers, you can specify values between 200 and 499, and the default value is 200. You can specify multiple values (for example, “200,202”) or a range of values (for example, “200-299”).

For Network Load Balancers and Gateway Load Balancers, this must be “200–399”.

Note that when using shorthand syntax, some values such as commas need to be escaped.

GrpcCode -> (string)

You can specify values between 0 and 99. You can specify multiple values (for example, “0,1”) or a range of values (for example, “0-5”). The default value is 12.

LoadBalancerArns -> (list)

The Amazon Resource Names (ARN) of the load balancers that route traffic to this target group.

(string)

TargetType -> (string)

The type of target that you must specify when registering targets with this target group. The possible values are instance (register targets by instance ID), ip (register targets by IP address), lambda (register a single Lambda function as a target), or alb (register a single Application Load Balancer as a target).

ProtocolVersion -> (string)

[HTTP/HTTPS protocol] The protocol version. The possible values are GRPC , HTTP1 , and HTTP2 .

IpAddressType -> (string)

The type of IP address used for this target group. The possible values are ipv4 and ipv6 . This is an optional parameter. If not specified, the IP address type defaults to ipv4 .

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