resource “aws_elb” “web” {

name = "terraform-example-elb"

# The same availability zone as our instances
availability_zones = ["${aws_instance.web.*.availability_zone}"]

listener {
  instance_port     = 80
  instance_protocol = "http"
  lb_port           = 80
  lb_protocol       = "http"
}

# The instances are registered automatically
instances = ["${aws_instance.web.*.id}"]

}