Request Parameters Response Elements Errors Examples See Also

ModifyTargetGroup

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

To monitor the health of the targets, use DescribeTargetHealth.

Request Parameters

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

HealthCheckEnabled

Indicates whether health checks are enabled.

Type: Boolean

Required: No

HealthCheckIntervalSeconds

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

Type: Integer

Valid Range: Minimum value of 5. Maximum value of 300.

Required: No

HealthCheckPath

[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 /AWS.ALB/healthcheck.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 1024.

Required: No

HealthCheckPort

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

Type: String

Required: No

HealthCheckProtocol

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.

Type: String

Valid Values: HTTP | HTTPS | TCP | TLS | UDP | TCP_UDP | GENEVE

Required: No

HealthCheckTimeoutSeconds

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

Type: Integer

Valid Range: Minimum value of 2. Maximum value of 120.

Required: No

HealthyThresholdCount

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

Type: Integer

Valid Range: Minimum value of 2. Maximum value of 10.

Required: No

Matcher

[HTTP/HTTPS health checks] The HTTP or gRPC codes to use when checking for a successful response from a target. For target groups with a protocol of TCP, TCP_UDP, UDP or TLS the range is 200-599. For target groups with a protocol of HTTP or HTTPS, the range is 200-499. For target groups with a protocol of GENEVE, the range is 200-399.

Type: Matcher object

Required: No

TargetGroupArn

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

Type: String

Required: Yes

UnhealthyThresholdCount

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

Type: Integer

Valid Range: Minimum value of 2. Maximum value of 10.

Required: No

Response Elements

The following element is returned by the service.

TargetGroups.member.N

Information about the modified target group.

Type: Array of TargetGroup objects

Errors

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

InvalidConfigurationRequest

The requested configuration is not valid.

HTTP Status Code: 400

TargetGroupNotFound

The specified target group does not exist.

HTTP Status Code: 400

Examples

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.

Sample Request


https://elasticloadbalancing.amazonaws.com/?Action=ModifyTargetGroup
&TargetGroupArn=arn:aws:elasticloadbalancing:us-west-2:123456789012:targetgroup/my-https-targets/2453ed029918f21f
&HealthCheckProtocol=HTTPS
&HealthCheckPort=443
&Version=2015-12-01
&AUTHPARAMS

Sample Response


<ModifyTargetGroupResponse xmlns="http://elasticloadbalancing.amazonaws.com/doc/2015-12-01/">
  <ModifyTargetGroupResult> 
    <TargetGroups> 
      <member> 
        <TargetGroupArn>arn:aws:elasticloadbalancing:us-west-2:123456789012:targetgroup/my-https-targets/2453ed029918f21f</TargetGroupArn> 
        <HealthCheckTimeoutSeconds>5</HealthCheckTimeoutSeconds> 
        <HealthCheckPort>443</HealthCheckPort> 
        <Matcher> 
          <HttpCode>200</HttpCode> 
        </Matcher> 
        <TargetGroupName>my-https-targets</TargetGroupName> 
        <HealthCheckProtocol>HTTPS</HealthCheckProtocol> 
        <Protocol>HTTPS</Protocol> 
        <Port>443</Port> 
        <HealthyThresholdCount>5</HealthyThresholdCount> 
        <VpcId>vpc-3ac0fb5f</VpcId> 
        <HealthCheckIntervalSeconds>30</HealthCheckIntervalSeconds> 
        <LoadBalancerArns> 
          <member>arn:aws:elasticloadbalancing:us-west-2:123456789012:loadbalancer/app/my-load-balancer/50dc6c495c0c9188</member> 
        </LoadBalancerArns> 
        <UnhealthyThresholdCount>2</UnhealthyThresholdCount> 
      </member> 
    </TargetGroups> 
  </ModifyTargetGroupResult> 
  <ResponseMetadata> 
    <RequestId>8525b334-f466-11e5-aa04-33bf366f62e2</RequestId> 
  </ResponseMetadata> 
</ModifyTargetGroupResponse>