AWS Target group

AWS Target group doc

Commands

• aws elbv2 create-target-group
• aws elbv2 create-target-group --target-type [ instance | ip | lambda ]
• aws elbv2 describe-target-groups | grep TargetGroupName
• Terraform resource: aws_lb_target_group

Errors

• Unhealthy: Request timed out
• Initial: Target registration is in progress
• Error: error creating MyECSServiceName service
• Error: deleting Target Group
• Reason Health checks failed with these codes
• ResourceInUse
• Task failed ELB health checks in ...
• Draining: Target deregistration is in progress

"message": "(service your-service) (port 1236) is unhealthy in (target-group arn:aws:elasticloadbalancing:eu-west-1:***:targetgroup/your-tg/de945c5123456) due to (reason Health checks failed).", "id": "bab160d2-b5d5-4170-91a1-73e92f34b563", "createdAt": 1676632404.784

News

• Jul 2019 ECS Multiple load balancer target groups per ECS service https://aws.amazon.com/about-aws/whats-new/2019/07/amazon-ecs-services-now-support-multiple-load-balancer-target-groups/

Related terms

• TargetGroupArn
• Draining

See also

• AWS Target group: aws_lb_target_group
• Terraform resource: aws_lb_target_group, target_group_arn, aws lb target group - fixed response, CreateTargetGroup
• AWS ALB, Target Group, listener, SNI, Troubleshoot your Application Load Balancers, aws_lb, aws_lb_listener (data), Resource map, security policies, aws_lb_listener_certificate