Update example usage of location_from_id, project_from_id, and region…

…_from_zone functions (#10265)

mmv1/third_party/terraform/website/docs/functions/location_from_id.html.markdown

@@ -23,9 +23,27 @@ terraform {
   }
 }
 
+resource "google_cloud_run_service" "default" {
+  name     = "my-service"
+  location = "us-central1"
+
+  template {
+    spec {
+      containers {
+        image = "us-docker.pkg.dev/cloudrun/container/hello"
+      }
+    }
+  }
+
+  traffic {
+    percent         = 100
+    latest_revision = true
+  }
+}
+
 # Value is "us-central1"
-output "function_output" {
-  value = provider::google::location_from_id("https://run.googleapis.com/v2/projects/my-project/locations/us-central1/services/my-service")
+output "location_from_id" {
+  value = provider::google::location_from_id(google_cloud_run_service.default.id)
 }
 ```
 
@@ -40,9 +58,29 @@ terraform {
   }
 }
 
+resource "google_cloud_run_service" "default" {
+  # provider argument omitted - provisioning by google or google-beta doesn't impact this example
+  name     = "my-service"
+  location = "us-central1"
+
+  template {
+    spec {
+      containers {
+        image = "us-docker.pkg.dev/cloudrun/container/hello"
+      }
+    }
+  }
+
+  traffic {
+    percent         = 100
+    latest_revision = true
+  }
+}
+
+
 # Value is "us-central1"
-output "function_output" {
-  value = provider::google-beta::location_from_id("https://run.googleapis.com/v2/projects/my-project/locations/us-central1/services/my-service")
+output "location_from_id" {
+  value = provider::google-beta::location_from_id(google_cloud_run_service.default.id)
 }
 ```
 

mmv1/third_party/terraform/website/docs/functions/project_from_id.html.markdown

@@ -23,9 +23,14 @@ terraform {
   }
 }
 
+resource "google_pubsub_topic" "default" {
+  project = "my-project"
+  name    = "my-topic"
+}
+
 # Value is "my-project"
-output "function_output" {
-  value = provider::google::project_from_id("https://www.googleapis.com/compute/v1/projects/my-project/zones/us-central1-c/instances/my-instance")
+output "project_from_id" {
+  value = provider::google::project_from_id(google_pubsub_topic.default.id)
 }
 ```
 
@@ -40,9 +45,15 @@ terraform {
   }
 }
 
+resource "google_pubsub_topic" "default" {
+  # provider argument omitted - provisioning by google or google-beta doesn't impact this example
+  project = "my-project"
+  name    = "my-topic"
+}
+
 # Value is "my-project"
-output "function_output" {
-  value = provider::google-beta::project_from_id("https://www.googleapis.com/compute/v1/projects/my-project/zones/us-central1-c/instances/my-instance")
+output "project_from_id" {
+  value = provider::google-beta::project_from_id(google_pubsub_topic.default.id)
 }
 ```
 

mmv1/third_party/terraform/website/docs/functions/region_from_zone.html.markdown

@@ -23,9 +23,48 @@ terraform {
   }
 }
 
-# Value is "us-central1"
-output "function_output" {
-  value = provider::google::region_from_zone("us-central1-b")
+resource "google_compute_instance" "default" {
+  name         = "my-instance"
+  machine_type = "n2-standard-2"
+  zone         = "us-central1-a"
+
+  boot_disk {
+    initialize_params {
+      image = "debian-cloud/debian-11"
+      labels = {
+        my_label = "value"
+      }
+    }
+  }
+
+  network_interface {
+    network    = "default"
+    subnetwork = google_compute_subnetwork.default.id
+    access_config {
+      // Ephemeral public IP
+    }
+  }
+
+  metadata_startup_script = "echo hi > /test.txt"
+}
+
+data "google_compute_network" "default" {
+  name = "default"
+}
+
+resource "google_compute_subnetwork" "default" {
+  name          = "my-subnet"
+  region        = "us-central1"
+  network       = data.google_compute_network.default.id
+  ip_cidr_range = "192.168.10.0/24"
+}
+
+// The region_from_zone function is used to assert that the VM and subnet are in the same region
+check "vm_subnet_compatibility_check" {
+  assert {
+    condition     = google_compute_subnetwork.default.region == provider::google::region_from_zone(google_compute_instance.default.zone)
+    error_message = "Subnet ${google_compute_subnetwork.default.id} and VM ${google_compute_instance.default.id} are not in the same region"
+  }
 }
 ```
 
@@ -40,9 +79,51 @@ terraform {
   }
 }
 
-# Value is "us-central1"
-output "function_output" {
-  value = provider::google-beta::region_from_zone("us-central1-b")
+resource "google_compute_instance" "default" {
+  provider     = google-beta
+  name         = "my-instance"
+  machine_type = "n2-standard-2"
+  zone         = "us-central1-a"
+
+  boot_disk {
+    initialize_params {
+      image = "debian-cloud/debian-11"
+      labels = {
+        my_label = "value"
+      }
+    }
+  }
+
+  network_interface {
+    network    = "default"
+    subnetwork = google_compute_subnetwork.default.id
+    access_config {
+      // Ephemeral public IP
+    }
+  }
+
+  metadata_startup_script = "echo hi > /test.txt"
+}
+
+data "google_compute_network" "default" {
+  provider   = google-beta
+  name       = "default"
+}
+
+resource "google_compute_subnetwork" "default" {
+  provider      = google-beta
+  name          = "my-subnet"
+  region        = "us-central1"
+  network       = data.google_compute_network.default.id
+  ip_cidr_range = "192.168.10.0/24"
+}
+
+// The region_from_zone function is used to assert that the VM and subnet are in the same region
+check "vm_subnet_compatibility_check" {
+  assert {
+    condition     = google_compute_subnetwork.default.region == provider::google-beta::region_from_zone(google_compute_instance.default.zone)
+    error_message = "Subnet ${google_compute_subnetwork.default.id} and VM ${google_compute_instance.default.id} are not in the same region"
+  }
 }
 ```