AWS Target group

• https://docs.aws.amazon.com/elasticloadbalancing/latest/application/load-balancer-target-groups.html

• aws elbv2 create-target-group
• aws elbv2 create-target-group --target-type [ instance | ip | lambda ]

• aws elbv2 describe-target-groups | grep TargetGroupName

Related terms

• Terraform resource: aws_lb_target_group
• TargetGroupArn
• Draining

Errors

• Error: error creating MyECSServiceName service
• Error: deleting Target Group
• Reason Health checks failed with these codes
• ResourceInUse

Errors

"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

Task failed ELB health checks in ...

Target deregistration is in progress

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/

See also

• AWS Target group
• Terraform AWS provider: aws_lb_target_group, target_group_arn, aws lb target group - fixed response
• AWS ALB, AWS::ElasticLoadBalancingV2 [aws elbv2 | create-load-balancer | describe-load-balancers | create-target-group | describe-target-groups | describe-target-health | create-rule | register-targets | describe-account-limits ], alb-http-drop-invalid-header-enabled
• AWS ALB, Target Group, SNI, Troubleshoot your Application Load Balancers
• ALB, Load balancer (Networking), AWS ALB, openstack loadbalancer create, AWS ALB Ingress Controller, Target group, AWS Load Balancer Controller, alb-http-drop-invalid-header-enabled, Least Outstanding Requests (LOR)