module "load_balancer" {

  source       = "GoogleCloudPlatform/lb/google"

  version      = "~> 2.0.0"

  region       = var.region

  name         = "load-balancer"

  service_port = 80

  target_tags  = ["allow-lb-service"]

  network      = var.network

}

​

module "managed_instance_group" {

  source            = "terraform-google-modules/vm/google//modules/mig"

  version           = "~> 1.0.0"

  region            = var.region

  target_size       = 2

  hostname          = "mig-simple"

  instance_template = module.instance_template.self_link

  target_pools      = [module.load_balancer.target_pool]

  named_ports = [{

    name = "http"

    port = 80

  }]

}