AWS Load Balancer

aws_lb.tf

resource "aws_alb" "alb" {
  subnets = ["${aws_subnet.pub_subnet_1.id}", "${aws_subnet.pub_subnet_2.id}"]
  internal = false
  security_groups = ["${aws_security_group.alb.id}"]
  depends_on = ["aws_internet_gateway.app_igw", "aws_vpc_dhcp_options_association.dns_resolver"]
}

resource "aws_alb_target_group" "targ" {
  port = 8080
  protocol = "HTTP"
  vpc_id = "${aws_vpc.app_vpc.id}"
  health_check {
    healthy_threshold   = 2
    unhealthy_threshold = 2
    timeout             = 5
    path                = "/"
    interval            = 30
    port                = 80
    matcher             = "200-399"
  }
  stickiness {
    type = "lb_cookie"
    enabled = true
  }
}

resource "aws_alb_target_group_attachment" "attach_web" {
  target_group_arn = "${aws_alb_target_group.targ.arn}"
  target_id = "${element(aws_instance.wp.*.id, count.index)}"
  port = 80
  count = 2
}

resource "aws_alb_listener" "list" {
  "default_action" {
    target_group_arn = "${aws_alb_target_group.targ.arn}"
    type = "forward"
  }
  load_balancer_arn = "${aws_alb.alb.arn}"
  port = 80
}