on espere ca va marcher

terraform/modules/network/main.tf

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+provider "google" {
+  project = var.project_name
+  region  = var.region
+}
+
+resource "google_compute_network" "custom_vpc" {
+  name                    = "${var.project_name}-vpc"
+  auto_create_subnetworks = false
+}
+
+resource "google_compute_subnetwork" "frontend" {
+  name          = "${var.project_name}-frontend-subnet"
+  ip_cidr_range = var.frontend_cidr
+  network       = google_compute_network.custom_vpc.id
+  region        = var.region
+}
+
+resource "google_compute_subnetwork" "backend" {
+  name          = "${var.project_name}-backend-subnet"
+  ip_cidr_range = var.backend_cidr
+  network       = google_compute_network.custom_vpc.id
+  region        = var.region
+}
+
+resource "google_compute_subnetwork" "database" {
+  name          = "${var.project_name}-database-subnet"
+  ip_cidr_range = var.database_cidr
+  network       = google_compute_network.custom_vpc.id
+  region        = var.region
+}
+
+resource "google_compute_firewall" "frontend_http_https" {
+  name    = "${var.project_name}-frontend-http-https"
+  network = google_compute_network.custom_vpc.id
+
+  allow {
+    protocol = "tcp"
+    ports    = ["80", "443"]
+  }
+
+  source_ranges = ["0.0.0.0/0"]
+  target_tags   = ["frontend"]
+}
+
+resource "google_compute_firewall" "ssh" {
+  name    = "${var.project_name}-ssh"
+  network = google_compute_network.custom_vpc.id
+
+  allow {
+    protocol = "tcp"
+    ports    = ["22"]
+  }
+
+  source_ranges = [var.ssh_source_ranges]
+}
+
+resource "google_compute_firewall" "frontend_to_backend" {
+  name    = "${var.project_name}-frontend-to-backend"
+  network = google_compute_network.custom_vpc.id
+
+  allow {
+    protocol = "tcp"
+    ports    = ["8000"]
+  }
+
+  source_tags = ["frontend"]
+  target_tags = ["backend"]
+}
+
+resource "google_compute_firewall" "backend_to_database" {
+  name    = "${var.project_name}-backend-to-database"
+  network = google_compute_network.custom_vpc.id
+
+  allow {
+    protocol = "tcp"
+    ports    = ["3306"]
+  }
+
+  source_tags = ["backend"]
+  target_tags = ["database"]
+}

terraform/modules/network/outputs.tf

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+output "vpc_id" {
+  description = "ID du VPC créé"
+  value       = google_compute_network.custom_vpc.id
+}
+
+output "subnet_ids" {
+  description = "IDs des sous-réseaux"
+  value = {
+    frontend = google_compute_subnetwork.frontend.id
+    backend  = google_compute_subnetwork.backend.id
+    database = google_compute_subnetwork.database.id
+  }
+}

terraform/modules/network/variables.tf

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+variable "project_name" {
+  description = "Nom du projet GCP"
+  type        = string
+}
+
+variable "region" {
+  description = "Région pour le VPC et les sous-réseaux"
+  type        = string
+}
+
+
+variable "ssh_source_ranges" {
+  description = "Plages IP autorisées pour SSH"
+  type        = string
+}
+
+variable "frontend_cidr" {
+  description = "CIDR for frontend subnet"
+  type        = string
+  default     = "10.0.1.0/24"
+}
+
+variable "backend_cidr" {
+  description = "CIDR for backend subnet"
+  type        = string
+  default     = "10.0.2.0/24"
+}
+
+variable "database_cidr" {
+  description = "CIDR for database subnet"
+  type        = string
+  default     = "10.0.3.0/24"
+}