output "internal_ips" {
  description = "IP internes des instances frontend, backend, database."
  value = {
    frontend = google_compute_instance.vm1.network_interface[0].network_ip
    backend  = google_compute_instance.vm2.network_interface[0].network_ip
    database = google_compute_instance.vm3.network_interface[0].network_ip
  }
}

output "frontend_public_ip" {
  description = "Adresse IP publique de l'instance frontend."
  value       = google_compute_instance.vm1.network_interface[0].access_config[0].nat_ip
}


output "instance_names" {
  description = "Noms des instances compute."
  value = {
    frontend = google_compute_instance.vm1.name
    backend  = google_compute_instance.vm2.name
    database = google_compute_instance.vm3.name
  }
}