google_compute_service_attachment: allow use of global target forwarding rules (#14686) (#1082)

[upstream:870a3adaafd655859b73627e12c3f439bf4fa394]

Signed-off-by: Modular Magician <[email protected]>

Author: modular-magician

service_attachment_cross_region_ilb/backing_file.tf

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+# This file has some scaffolding to make sure that names are unique and that
+# a region and zone are selected when you try to create your Terraform resources.
+
+locals {
+  name_suffix = "${random_pet.suffix.id}"
+}
+
+resource "random_pet" "suffix" {
+  length = 2
+}
+
+provider "google" {
+  region = "us-central1"
+  zone   = "us-central1-c"
+}

service_attachment_cross_region_ilb/main.tf

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+resource "google_compute_service_attachment" "psc_ilb_service_attachment" {
+  name                  = "sa-${local.name_suffix}"
+  region                = "us-central1"
+  description           = "A service attachment configured with Terraform"
+  connection_preference = "ACCEPT_AUTOMATIC"
+  enable_proxy_protocol = false
+  nat_subnets           = [google_compute_subnetwork.subnetwork_psc.id]
+  target_service        = google_compute_global_forwarding_rule.forwarding_rule.id
+}
+
+resource "google_compute_global_forwarding_rule" "forwarding_rule" {
+  name                  = "sa-${local.name_suffix}"
+  target                = google_compute_target_http_proxy.http_proxy.id
+  network               = google_compute_network.network.id
+  subnetwork            = google_compute_subnetwork.subnetwork.id
+  port_range            = "80"
+  load_balancing_scheme = "INTERNAL_MANAGED"
+
+  depends_on = [google_compute_subnetwork.subnetwork_proxy]
+}
+
+resource "google_compute_target_http_proxy" "http_proxy" {
+  name        = "sa-${local.name_suffix}"
+  description = "a description"
+  url_map     = google_compute_url_map.url_map.id
+}
+
+resource "google_compute_url_map" "url_map" {
+  name            = "sa-${local.name_suffix}"
+  description     = "Url map."
+  default_service = google_compute_backend_service.backend_service.id
+}
+
+resource "google_compute_backend_service" "backend_service" {
+  name                  = "sa-${local.name_suffix}"
+  load_balancing_scheme = "INTERNAL_MANAGED"
+  health_checks         = [google_compute_health_check.health_check.id]
+}
+
+resource "google_compute_health_check" "health_check" {
+  name               = "sa-${local.name_suffix}"
+  check_interval_sec = 1
+  timeout_sec        = 1
+
+  tcp_health_check {
+    port = "80"
+  }
+}
+
+resource "google_compute_subnetwork" "subnetwork_psc" {
+  name          = "sa-${local.name_suffix}-psc"
+  region        = "us-central1"
+  network       = google_compute_network.network.id
+  purpose       =  "PRIVATE_SERVICE_CONNECT"
+  ip_cidr_range = "10.1.0.0/16"
+}
+
+resource "google_compute_subnetwork" "subnetwork_proxy" {
+  name          = "sa-${local.name_suffix}-proxy"
+  region        = "us-central1"
+  network       = google_compute_network.network.id
+  purpose       =  "GLOBAL_MANAGED_PROXY"
+  role          = "ACTIVE"
+  ip_cidr_range = "10.2.0.0/16"
+}
+
+resource "google_compute_subnetwork" "subnetwork" {
+  name          = "sa-${local.name_suffix}"
+  region        = "us-central1"
+  network       = google_compute_network.network.id
+  ip_cidr_range = "10.0.0.0/16"
+}
+
+resource "google_compute_network" "network" {
+  name                    = "sa-${local.name_suffix}"
+  auto_create_subnetworks = false
+}

service_attachment_cross_region_ilb/motd

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+===
+
+These examples use real resources that will be billed to the
+Google Cloud Platform project you use - so make sure that you
+run "terraform destroy" before quitting!
+
+===

service_attachment_cross_region_ilb/tutorial.md

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+# Service Attachment Cross Region Ilb - Terraform
+
+## Setup
+
+<walkthrough-author name="[email protected]" analyticsId="UA-125550242-1" tutorialName="service_attachment_cross_region_ilb" repositoryUrl="https://github.com/terraform-google-modules/docs-examples"></walkthrough-author>
+
+Welcome to Terraform in Google Cloud Shell! We need you to let us know what project you'd like to use with Terraform.
+
+<walkthrough-project-billing-setup></walkthrough-project-billing-setup>
+
+Terraform provisions real GCP resources, so anything you create in this session will be billed against this project.
+
+## Terraforming!
+
+Let's use {{project-id}} with Terraform! Click the Cloud Shell icon below to copy the command
+to your shell, and then run it from the shell by pressing Enter/Return. Terraform will pick up
+the project name from the environment variable.
+
+```bash
+export GOOGLE_CLOUD_PROJECT={{project-id}}
+```
+
+After that, let's get Terraform started. Run the following to pull in the providers.
+
+```bash
+terraform init
+```
+
+With the providers downloaded and a project set, you're ready to use Terraform. Go ahead!
+
+```bash
+terraform apply
+```
+
+Terraform will show you what it plans to do, and prompt you to accept. Type "yes" to accept the plan.
+
+```bash
+yes
+```
+
+
+## Post-Apply
+
+### Editing your config
+
+Now you've provisioned your resources in GCP! If you run a "plan", you should see no changes needed.
+
+```bash
+terraform plan
+```
+
+So let's make a change! Try editing a number, or appending a value to the name in the editor. Then,
+run a 'plan' again.
+
+```bash
+terraform plan
+```
+
+Afterwards you can run an apply, which implicitly does a plan and shows you the intended changes
+at the 'yes' prompt.
+
+```bash
+terraform apply
+```
+
+```bash
+yes
+```
+
+## Cleanup
+
+Run the following to remove the resources Terraform provisioned:
+
+```bash
+terraform destroy
+```
+```bash
+yes
+```