output "instances_internal_ips" {
    value = {
      frontend = google_compute_instance.tp07-frontend.network_interface.0.network_ip,
      backend = google_compute_instance.tp07-backend.network_interface.0.network_ip,
      database = google_compute_instance.tp07-database.network_interface.0.network_ip
    }
}

output "instances_names" {
    value = {
      frontend = google_compute_instance.tp07-frontend.name,
      backend = google_compute_instance.tp07-backend.name,
      database = google_compute_instance.tp07-database.name
    }
}

output "frontend_public_ip" {
    value = google_compute_instance.tp07-frontend.network_interface.0.access_config.0.nat_ip
}