$ ls *.tf
locals.tf  main.tf  network.tf  outputs.tf  provider.tf  variables.tf  versions.tf



$ more *.tf
::::::::::::::
locals.tf
::::::::::::::


locals {
  health_check = {
    check_interval_sec  = 1
    healthy_threshold   = 4
    timeout_sec         = 1
    unhealthy_threshold = 5
    port                = 8080
    request_path        = "/mypath"
    host                = "1.2.3.4"
  }
}



::::::::::::::
main.tf
::::::::::::::


data "template_file" "instance_startup_script" {
  template = file("${path.module}/templates/gceme.sh.tpl")

  vars = {
    PROXY_PATH = ""
  }
}

resource "google_service_account" "instance-group" {
  account_id = "instance-group"
}

module "instance_template" {
  source               = "terraform-google-modules/vm/google//modules/instance_template"
  version              = "~> 8.0"
  subnetwork           = google_compute_subnetwork.subnetwork.self_link
  source_image_family  = var.image_family
  source_image_project = var.image_project
  startup_script       = data.template_file.instance_startup_script.rendered

  service_account = {
    email  = google_service_account.instance-group.email
    scopes = ["cloud-platform"]
  }
}

module "managed_instance_group" {
  source            = "terraform-google-modules/vm/google//modules/mig"
  version           = "~> 8.0"
  region            = var.region
  target_size       = 2
  hostname          = "mig-simple"
  instance_template = module.instance_template.self_link

  target_pools = [
    module.load_balancer_default.target_pool,
    module.load_balancer_no_hc.target_pool,
    module.load_balancer_custom_hc.target_pool
  ]

  named_ports = [{
    name = "http"
    port = 80
  }]
}

module "load_balancer_default" {
  name         = "basic-load-balancer-default"
  source       = "../../"
  region       = var.region
  service_port = 80
  network      = google_compute_network.network.name

  target_service_accounts = [google_service_account.instance-group.email]
}

module "load_balancer_no_hc" {
  name                 = "basic-load-balancer-no-hc"
  source               = "../../"
  region               = var.region
  service_port         = 80
  network              = google_compute_network.network.name
  disable_health_check = true

  target_service_accounts = [google_service_account.instance-group.email]
}

module "load_balancer_custom_hc" {
  name         = "basic-load-balancer-custom-hc"
  source       = "../../"
  region       = var.region
  service_port = 8080
  network      = google_compute_network.network.name
  health_check = local.health_check

  target_service_accounts = [google_service_account.instance-group.email]
}



::::::::::::::
network.tf
::::::::::::::


resource "google_compute_network" "network" {
  name                    = "load-balancer-module-network"
  auto_create_subnetworks = "false"
}

resource "google_compute_subnetwork" "subnetwork" {
  name          = "load-balancer-module-subnetwork"
  region        = var.region
  network       = google_compute_network.network.self_link
  ip_cidr_range = "10.0.0.0/16"
}

resource "google_compute_router" "router" {
  name    = "load-balancer-module-router"
  region  = var.region
  network = google_compute_network.network.self_link
}

module "cloud_nat" {
  project_id = var.project_id
  region     = var.region
  name       = "load-balancer-module-nat"
  source     = "terraform-google-modules/cloud-nat/google"
  version    = "~> 2.2"
  router     = google_compute_router.router.name
}



::::::::::::::
outputs.tf
::::::::::::::


output "load_balancer_default_ip" {
  description = "The external ip address of the forwarding rule for default lb."
  value       = module.load_balancer_default.external_ip
}



::::::::::::::
provider.tf
::::::::::::::


provider "google" {
  project = var.project_id
}

provider "google-beta" {
  project = var.project_id
}





::::::::::::::
variables.tf
::::::::::::::
/**


variable "region" {
  default = "us-central1"
}

variable "project_id" {
  description = "GCP Project used to create resources."
}

variable "image_family" {
  description = "Image used for compute VMs."
  default     = "debian-11"
}

variable "image_project" {
  description = "GCP Project where source image comes from."
  default     = "debian-cloud"
}




::::::::::::::
versions.tf
::::::::::::::

terraform {
  required_version = ">= 0.13"
  required_providers {
    google = {
      source  = "hashicorp/google"
      version = ">= 3.53, < 5.0"
    }
    google-beta = {
      source  = "hashicorp/google-beta"
      version = ">= 3.53, < 5.0"
    }
    template = {
      source = "hashicorp/template"
    }
  }
}