output "frontend_public_ip" {
  value = google_compute_instance.frontend.network_interface[0].access_config[0].nat_ip
}

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 "instance_names" {
  value = [
    google_compute_instance.frontend.name,
    google_compute_instance.backend.name,
    google_compute_instance.database.name
  ]
}