Teraform setup and learn

main.tf

# install terraform steps and interactive web browser
# https://learn.hashicorp.com/tutorials/terraform/install-cli

provider "google" {
    #version = "3.5.0"
   # credentials = file("/downloads/compute-instance.json")
   # OR
   # use gcloud auth application-default login/revoke
  project = "zeta-yen-319702"
  region  = "us-central1"
  zone    = "us-central1-c"
}

resource "google_compute_network" "vpc_network" {
    name = "terraform-network"
}
resource "google_compute_instance" "vm_instance" {
        name = "terraform-instance2"
        machine_type = "f1-micro"
        zone = "us-central1-c"
        boot_disk {
            initialize_params {
            image = "centos-cloud/centos-7"
            }
    }

    network_interface {
        network = google_compute_network.vpc_network.name
        # you can just omit the access_config section in network_interface block
        # https://registry.terraform.io/providers/hashicorp/google/latest/docs/resources/compute_instance#access_config
        access_config {
        }
    }
}
output "ip" {
 value = google_compute_instance.vm_instance.network_interface.0.access_config.0.nat_ip
}

# How to import existing 
# https://www.terraform.io/language/state/import