targetGroupArn

The full Amazon Resource Name (ARN) of the Elastic Load Balancing target group or groups associated with a service or task set. A target group ARN is only specified when using an Application Load Balancer or Network Load Balancer. For services using the `ECS` deployment controller, you can specify one or multiple target groups. For more information, see Registering multiple target groups with a service in the Amazon Elastic Container Service Developer Guide. For services using the `CODE_DEPLOY` deployment controller, you're required to define two target groups for the load balancer. For more information, see Blue/green deployment with CodeDeploy in the Amazon Elastic Container Service Developer Guide. If your service's task definition uses the `awsvpc` network mode, you must choose `ip` as the target type, not `instance`. Do this when creating your target groups because tasks that use the `awsvpc` network mode are associated with an elastic network interface, not an Amazon EC2 instance. This network mode is required for the Fargate launch type.