output "internal_ips" {
  value = {
    frontend = google_compute_instance.vm_frontend.network_interface.0.network_ip
    backend  = google_compute_instance.vm_backend.network_interface.0.network_ip
    database = google_compute_instance.vm_database.network_interface.0.network_ip
  }
  description = "Internal ips of instances"
}

output "public_ip" {
  value = google_compute_instance.vm_frontend.network_interface.0.access_config.0.nat_ip
}

output "instance_names" {
  value = {
    frontend = google_compute_instance.vm_frontend.name
    backend  = google_compute_instance.vm_backend.name
    database = google_compute_instance.vm_database.name
  }
  description = "Name of instances"
}