terraform show

terraform/environments/dev/main.tf

@@ -0,0 +1,60 @@
+terraform {
+  required_providers {
+    google = {
+      source  = "hashicorp/google"
+      version = "~> 6.12.0"
+    }
+  }
+}
+
+provider "google" {
+  project = var.project_id
+  region  = var.region
+}
+
+# ------------------------
+# Module NETWORK
+# ------------------------
+
+module "network" {
+  source            = "../../modules/network"
+  project_name      = var.project_name
+  region           = var.region
+  frontend_cidr    = var.frontend_cidr
+  backend_cidr     = var.backend_cidr
+  database_cidr    = var.database_cidr
+  ssh_source_ranges = var.ssh_source_ranges
+}
+
+# ------------------------
+# Module COMPUTE
+# ------------------------
+
+module "compute" {
+  source              = "../../modules/compute"
+  instance_type       = var.instance_type
+  zone                = var.zone
+  frontend_subnet_id  = module.network.subnet_ids["frontend"]
+  backend_subnet_id   = module.network.subnet_ids["backend"]
+  database_subnet_id  = module.network.subnet_ids["database"]
+}
+
+# ------------------------
+# Module IAM
+# ------------------------
+
+module "iam" {
+  source     = "../../modules/iam"
+  project_id = var.project_id
+}
+
+# ------------------------
+# Fichier template Ansible
+# ------------------------
+
+resource "local_file" "ansible_cfg" {
+  filename = "${path.module}/ansible.cfg"
+  content  = templatefile("${path.module}/../../templates/ansible.cfg.tpl", {
+    remote_user = "raphael.hochlaf@gmail.com"
+  })
+}

terraform/environments/dev/outputs.tf

@@ -0,0 +1,11 @@
+output "network_info" {
+  value = module.network
+}
+
+output "instance_info" {
+  value = module.compute
+}
+
+output "iam_info" {
+  value = module.iam.service_account_email
+}

terraform/environments/dev/variables.tf

@@ -0,0 +1,34 @@
+variable "project_name" {
+  default = "test"
+}
+variable "project_id" {
+  default = "empanada-478713"
+}
+
+variable "region" {
+  default = "europe-west9"
+}
+
+variable "zone" {
+  default = "${var.region}-b"
+}
+
+variable "instance_type" {
+  default = "e2-medium"
+}
+
+variable "frontend_cidr" {
+  default = "10.0.1.0/24"
+}
+
+variable "backend_cidr" {
+  default = "10.0.2.0/24"
+}
+
+variable "database_cidr" {
+  default = "10.0.3.0/24"
+}
+
+variable "ssh_source_ranges" {
+  default = "0.0.0.0/0"
+}

terraform/modules/compute/main.tf

@@ -0,0 +1,85 @@
+locals {
+  image = "projects/debian-cloud/global/images/family/debian-11"
+}
+
+# ------------------------
+# FRONTEND instance
+# ------------------------
+
+resource "google_compute_instance" "frontend" {
+  name         = "frontend"
+  machine_type = var.instance_type
+  zone         = var.zone
+
+  tags = ["frontend", "ssh"]
+
+  boot_disk {
+    initialize_params {
+      size  = 10
+      image = local.image
+    }
+  }
+
+  network_interface {
+    subnetwork   = var.frontend_subnet_id
+    access_config {}
+  }
+
+  metadata = {
+    enable-oslogin = "TRUE"
+  }
+}
+
+# ------------------------
+# BACKEND instance
+# ------------------------
+
+resource "google_compute_instance" "backend" {
+  name         = "backend"
+  machine_type = var.instance_type
+  zone         = var.zone
+
+  tags = ["backend", "ssh"]
+
+  boot_disk {
+    initialize_params {
+      size  = 10
+      image = local.image
+    }
+  }
+
+  network_interface {
+    subnetwork = var.backend_subnet_id
+  }
+
+  metadata = {
+    enable-oslogin = "TRUE"
+  }
+}
+
+# ------------------------
+# DATABASE instance
+# ------------------------
+
+resource "google_compute_instance" "database" {
+  name         = "database"
+  machine_type = var.instance_type
+  zone         = var.zone
+
+  tags = ["database", "ssh"]
+
+  boot_disk {
+    initialize_params {
+      size  = 20
+      image = local.image
+    }
+  }
+
+  network_interface {
+    subnetwork = var.database_subnet_id
+  }
+
+  metadata = {
+    enable-oslogin = "TRUE"
+  }
+}

terraform/modules/compute/outputs.tf

@@ -0,0 +1,19 @@
+output "internal_ips" {
+  value = {
+    frontend = google_compute_instance.frontend.network_interface[0].network_ip
+    backend  = google_compute_instance.backend.network_interface[0].network_ip
+    database = google_compute_instance.database.network_interface[0].network_ip
+  }
+}
+
+output "frontend_public_ip" {
+  value = google_compute_instance.frontend.network_interface[0].access_config[0].nat_ip
+}
+
+output "instance_names" {
+  value = [
+    google_compute_instance.frontend.name,
+    google_compute_instance.backend.name,
+    google_compute_instance.database.name
+  ]
+}

terraform/modules/compute/variables.tf

@@ -0,0 +1,24 @@
+variable "instance_type" {
+  description = "instance_type"
+  type = string
+}
+
+variable "zone" {
+  description = "zone"
+  type = string
+}
+
+variable "frontend_subnet_id" {
+  description = "frontend_subnet_id"
+  type = string
+}
+
+variable "backend_subnet_id" {
+  description = "backend_subnet_id"
+  type = string
+}
+
+variable "database_subnet_id" {
+  description = "database_subnet_id"
+  type = string
+}

terraform/modules/iam/main.tf

@@ -0,0 +1,24 @@
+# Service Account Terraform
+resource "google_service_account" "terraform_sa" {
+  account_id   = "terraform-admin"
+  display_name = "Terraform Admin"
+}
+
+# Key
+resource "google_service_account_key" "terraform_sa_key" {
+  service_account_id = google_service_account.terraform_sa.name
+}
+
+# IAM roles nécessaires
+resource "google_project_iam_member" "terraform_roles" {
+  project = var.project_id
+  role    = "roles/owner"
+  member  = "serviceAccount:${google_service_account.terraform_sa.email}"
+}
+
+# Activation OS Login pour SSH
+resource "google_os_login_ssh_public_key" "ssh_key" {
+  user            = "raphael.hochlaf@gmail.com"
+  key             = file("~/.ssh/id_ed25519.pub")
+  project         = var.project_id
+}

terraform/modules/iam/outputs.tf

@@ -0,0 +1,8 @@
+output "service_account_email" {
+  value = google_service_account.terraform_sa.email
+}
+
+output "service_account_private_key" {
+  value     = google_service_account_key.terraform_sa_key.private_key
+  sensitive = true
+}

terraform/modules/iam/variables.tf

@@ -0,0 +1,4 @@
+variable "project_id" {
+    description = "project_id"
+  type = string
+}

terraform/modules/network/main.tf

@@ -0,0 +1,79 @@
+resource "google_compute_network" "vpc" {
+  name                    = "${var.project_name}-vpc"
+  auto_create_subnetworks = false
+}
+
+resource "google_compute_subnetwork" "frontend" {
+  name          = "${var.project_name}-frontend"
+  region        = var.region
+  network       = google_compute_network.vpc.self_link
+  ip_cidr_range = var.frontend_cidr
+}
+
+resource "google_compute_subnetwork" "backend" {
+  name          = "${var.project_name}-backend"
+  region        = var.region
+  network       = google_compute_network.vpc.self_link
+  ip_cidr_range = var.backend_cidr
+}
+
+resource "google_compute_subnetwork" "database" {
+  name          = "${var.project_name}-database"
+  region        = var.region
+  network       = google_compute_network.vpc.self_link
+  ip_cidr_range = var.database_cidr
+}
+
+# Firewall rules ------------------
+
+resource "google_compute_firewall" "frontend_http" {
+  name    = "${var.project_name}-frontend-http"
+  network = google_compute_network.vpc.self_link
+
+  allow {
+    protocol = "tcp"
+    ports    = ["80", "443"]
+  }
+
+  target_tags   = ["frontend"]
+  source_ranges = ["0.0.0.0/0"]
+}
+
+resource "google_compute_firewall" "ssh" {
+  name    = "${var.project_name}-ssh"
+  network = google_compute_network.vpc.self_link
+
+  allow {
+    protocol = "tcp"
+    ports    = ["22"]
+  }
+
+  target_tags   = ["ssh"]
+  source_ranges = [var.ssh_source_ranges]
+}
+
+resource "google_compute_firewall" "frontend_backend" {
+  name    = "${var.project_name}-frontend-to-backend"
+  network = google_compute_network.vpc.self_link
+
+  allow {
+    protocol = "tcp"
+    ports    = ["8000"]
+  }
+
+  source_tags = ["frontend"]
+  target_tags = ["backend"]
+}
+
+resource "google_compute_firewall" "backend_database" {
+  name    = "${var.project_name}-backend-to-database"
+  network = google_compute_network.vpc.self_link
+
+  allow {
+    protocol = "tcp"
+    ports    = ["3306"]
+  }
+
+  source_tags = ["backend"]
+  target_tags = ["database"]
+}

terraform/modules/network/outputs.tf

@@ -0,0 +1,11 @@
+output "vpc_id" {
+  value = google_compute_network.vpc.id
+}
+
+output "subnet_ids" {
+  value = {
+    frontend = google_compute_subnetwork.frontend.id
+    backend  = google_compute_subnetwork.backend.id
+    database = google_compute_subnetwork.database.id
+  }
+}

terraform/modules/network/variables.tf

@@ -0,0 +1,30 @@
+
+variable "project_name" {
+  description = "Nom du projet"
+  type = string
+}
+
+variable "region" {
+  description = "Nom de la région"
+  type = string
+}
+
+variable "frontend_cidr" {
+  description = "CIDR for frontend subnet"
+  type        = string
+}
+
+variable "backend_cidr" {
+  description = "CIDR for backend subnet"
+  type        = string
+}
+
+variable "database_cidr" {
+  description = "CIDR for database subnet"
+  type        = string
+}
+
+variable "ssh_source_ranges" {
+  description = "ssh_source_ranges"
+  type = string
+}