Terraform Demo Snippet

target_group.tf

resource "aws_lb_listener_rule" "client" {
  listener_arn = "${aws_lb_listener.https.arn}"
  priority     = 100

  action {
    type             = "forward"
    target_group_arn = "${aws_lb_target_group.client.arn}"
  }

  condition {
    field  = "host-header"
    values = ["${aws_route53_record.domain.fqdn}"]
  }
}

resource "aws_lb_target_group" "client" {
  name     = "${var.lb_name}-client"
  port     = "${local.client_port}"
  protocol = "HTTP"
  vpc_id   = "${var.vpc_id}"

  tags = "${merge(var.tags, map("Name", "${var.lb_name}-client"))}"

  stickiness {
    type = "lb_cookie"
  }

  health_check {
    path     = "/"
    protocol = "HTTP"
    port     = "${local.client_port}"
  }
}

resource "aws_autoscaling_attachment" "client" {
  alb_target_group_arn   = "${aws_lb_target_group.client.arn}"
  autoscaling_group_name = "${aws_autoscaling_group.client.id}"
}