but3-iac/terraform/modules/network/main.tf

resource "google_compute_network" "vpc" {
  name = "vpc-1"
  auto_create_subnetworks = "false"
}

resource "frontend" "subnet" {
  name = "sub_fr"
  network = google_compute_network.vpc.id
  ip_cidr_range = "10.0.1.0/24"
  region = "europe-west9"

  allow {
    protocol = ssh
    ports = ["8000"]
  }

  target_tags = ["backend"]
}


resource "backend" "subnet" {
  name = "sub_ba"
  network = google_compute_network.vpc.id
  ip_cidr_range = "10.0.2.0/24"
  region = "europe-west9"

  allow {
    protocol = ssh
    ports = ["3306"]
  }

  target_tags = ["database"]

}


resource "database" "subnet" {
  name = "sub_da"
  network = google_compute_network.vpc.id
  ip_cidr_range = "10.0.3.0/24"
  region = "europe-west9"
}