Load balancer (argument)

load_balancer optional argument for aws_ecs_service resource.

.../...
load_balancer {
  target_group_arn = aws_lb_target_group.foo.arn
  container_name   = "mongo"
  container_port   = 8080
}
.../...

Official example

resource "aws_ecs_service" "mongo" {
 name            = "mongodb"
 cluster         = aws_ecs_cluster.foo.id
 task_definition = aws_ecs_task_definition.mongo.arn
 desired_count   = 3
 iam_role        = aws_iam_role.foo.arn
 depends_on      = [aws_iam_role_policy.foo]

 ordered_placement_strategy {
   type  = "binpack"
   field = "cpu"
 }

 load_balancer {
   target_group_arn = aws_lb_target_group.foo.arn
   container_name   = "mongo"
   container_port   = 8080
 }

 placement_constraints {
   type       = "memberOf"
   expression = "attribute:ecs.availability-zone in [us-west-2a, us-west-2b]"
 }
}

See also

• Terraform resource: aws_ecs_service: launch_type (EC2, FARGATE), iam_role, depends_on, load_balancer, desired_count, placement_constraints, deployment_minimum_healthy_percent, iam role
• Terraform ECS: module, resources: aws_ecs_cluster, aws_ecs_service: task definition, aws_ecs_task_definition: container_definitions

https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/ecs_service#load_balancer