```hcl
module "worker" {
  source       = "github.com/nubisproject/nubis-terraform//worker?ref=master"
  region       = "${var.region}"
  environment  = "${var.environment}"
  account      = "${var.account}"
  service_name = "${var.service_name}"
  purpose      = "webserver"
  ami          = "${var.ami}"
  elb          = "${module.load_balancer.name}"
  ssh_key_file = "${var.ssh_key_file}"
  ssh_key_name = "${var.ssh_key_name}"
  min_instances = 2
}

module "load_balancer" {
  source       = "github.com/nubisproject/nubis-terraform//load_balancer?ref=master"
  region       = "${var.region}"
  environment  = "${var.environment}"
  account      = "${var.account}"
  service_name = "${var.service_name}"

  health_check_target = "HTTP:80/planet.css"
}

module "dns" {
  source       = "github.com/nubisproject/nubis-terraform//dns?ref=master"
  region       = "${var.region}"
  environment  = "${var.environment}"
  account      = "${var.account}"
  service_name = "${var.service_name}"
  target       = "${module.load_balancer.address}"
}
```

Use newly released nubis-terraform v1.3.0
user
```hcl
module "worker" {
  source       = "github.com/nubisproject/nubis-terraform//worker?ref=v1.3.0"
  region       = "${var.region}"
  environment  = "${var.environment}"
  account      = "${var.account}"
  service_name = "${var.service_name}"
  purpose      = "webserver"
  ami          = "${var.ami}"
  elb          = "${module.load_balancer.name}"
  ssh_key_file = "${var.ssh_key_file}"
  ssh_key_name = "${var.ssh_key_name}"
  min_instances = 2
}

module "load_balancer" {
  source       = "github.com/nubisproject/nubis-terraform//load_balancer?ref=v1.3.0"
  region       = "${var.region}"
  environment  = "${var.environment}"
  account      = "${var.account}"
  service_name = "${var.service_name}"

  health_check_target = "HTTP:80/planet.css"
}

module "dns" {
  source       = "github.com/nubisproject/nubis-terraform//dns?ref=v1.3.0"
  region       = "${var.region}"
  environment  = "${var.environment}"
  account      = "${var.account}"
  service_name = "${var.service_name}"
  target       = "${module.load_balancer.address}"
}
```
assistant