access config

 network_interface {
   network = "default"
   access_config {
     // Ephemeral public IP
   }
 }

Gemini Jan 2026

.../...
network_interface {
   network = data.google_compute_network.default.name

   # This block assigns the public IP. 
   # Leaving it empty configures an Ephemeral IP.
   # Passing the address argument locks it to your static IP.
   access_config {
     nat_ip = google_compute_address.static_public_ip.address
   }
}
.../...

Terraform compute: google_compute_instance, google_compute_address, google_compute_firewall, google_compute_resource_policy, google_compute_network, google_compute_subnetwork