Terraform/gcp need help for begin

Terraform
1

Hi all,

I begin with terraform and gcp and I try to create some compute instance in GCP using terraform.
But I have error when I do terraform plan.
Could you help me please?
The error is :

Error reading config for google_compute_instance[www-1]: google_compute_subnetwork.net-webapp: resource variables must be three parts: TYPE.NAME.ATTR in:

${google_compute_subnetwork.net-webapp}

here is my code:
front-www.tf

resource "google_compute_instance" "www-1" {
    	name = "simm-${var.web-hostname[0]}"
    	zone = "${var.area[0]}"
	    machine_type = "${var.compute_web}"
		boot_disk {
    		initialize_params {
      			image = "debian-9-stretch-v20190916"
    			}
  			}
	    can_ip_forward = false

		network {
						
			subnetwork = "${google_compute_subnetwork.net-webapp}"
			network_interface {
    			network = "default"
			}

		}
			
		
}

resource "google_compute_instance" "www-2" {
    	name = "simm-${var.web-hostname[1]}"
    	zone ="${var.area[1]}"
	    machine_type = "${var.compute_web}"
	    		boot_disk {
    		initialize_params {
      			image = "debian-9-stretch-v20190916"
    			}
  			}
		can_ip_forward = false

		network {
						
			subnetwork = "${google_compute_subnetwork.net-webapp}"
			network_interface {
    			network = "default"
			}


		}

networks.tf

resource "google_compute_network" "vpc" {
  name                    = "global-vpc"
  auto_create_subnetworks = "false"
}


resource "google_compute_subnetwork" "net-bastion" {
  name          = "vlan-front"
  ip_cidr_range = "10.33.80.0/24"
  network       = "${google_compute_network.vpc.self_link}"
}

resource "google_compute_subnetwork" "net-webapp" {
  name          = "vlan-db"
  ip_cidr_range = "10.33.81.0/24"
  network       = "${google_compute_network.vpc.self_link}"
  region = "${var.region}"
}

firewalls.tf

resource "google_compute_firewall" "SshIn" {
  name = "http_ingress"
  network = "${google_compute_subnetwork.net-bastion.name}"
  target_tags = ["bastion"]
  source_ranges = ["0.0.0.0/0"]

  allow {
    protocol = "tcp"
    ports = ["22"]
  }
}

resource "google_compute_firewall" "HttpIn" {
  name = "ssh-db"
  network = "${google_compute_subnetwork.net-webapp.name}"
  target_tags = ["webapp"]
  source_ranges = ["0.0.0.0/0"]

  allow {
    protocol = "tcp"
    ports = ["80"]
  }

  allow {
    protocol = "tcp"
    ports = ["443"]
  }
}

vars.tf

variable "project" {default= "eco2019"}
variable "compute_web" { default = "n1-standard-1"}
variable "web-hostname" { default = ["www-1", "wwww-2"] }
variable "region" { default = "europe-west1"}
variable "area" { default = ["europe-west-a","europe-west-b","europe-west-c"]} `

Thank you

2

The error is telling you that you need to specify which attribute of google_compute_subnetwork you want to pass to subnetwork - as written you are passing the entire object.

I don’t know the actual attribute - you can consult the provider documentation for specifics - but something like this is what it’s expecting:


subnetwork = "${google_compute_subnetwork.net-webapp.name}"

Note that I’ve added .name to the end of the attribute, but you will need to find out which is the appropriate attribute.

3

Thank you,

I will try it tomorrow.