docs: Add CMEK for Eventarc Advanced

eventarc/use_cmek_advanced/main.tf

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+/**
+ * Copyright 2025 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+# [START eventarc_advanced_terraform_cmek_apis]
+# Enable Compute Engine API
+resource "google_project_service" "compute" {
+  service            = "compute.googleapis.com"
+  disable_on_destroy = false
+}
+
+# Enable Cloud KMS API
+resource "google_project_service" "cloudkms" {
+  service            = "cloudkms.googleapis.com"
+  disable_on_destroy = false
+}
+
+# Enable Eventarc API
+resource "google_project_service" "eventarc" {
+  service            = "eventarc.googleapis.com"
+  disable_on_destroy = false
+}
+
+# Enable Cloud Pub/Sub API
+resource "google_project_service" "pubsub" {
+  service            = "pubsub.googleapis.com"
+  disable_on_destroy = false
+}
+# [END eventarc_advanced_terraform_cmek_apis]
+
+# Used to retrieve project information later
+data "google_project" "default" {
+}
+
+# [START eventarc_advanced_terraform_service_agent]
+resource "google_project_service_identity" "eventarc_sa" {
+  provider = google-beta
+  project  = data.google_project.default.project_id
+  service  = "eventarc.googleapis.com"
+}
+# [END eventarc_advanced_terraform_service_agent]
+
+# [START eventarc_advanced_terraform_cmek_key]
+resource "random_id" "default" {
+  byte_length = 8
+}
+
+# Create a Cloud KMS key ring
+resource "google_kms_key_ring" "default" {
+  name     = "${random_id.default.hex}-example-keyring"
+  location = "us-central1"
+}
+
+# Create a Cloud KMS key
+resource "google_kms_crypto_key" "default" {
+  name            = "example-key"
+  key_ring        = google_kms_key_ring.default.id
+  rotation_period = "7776000s"
+}
+# [END eventarc_advanced_terraform_cmek_key]
+
+# [START eventarc_advanced_terraform_cmek_role]
+# Grant service account access to Cloud KMS key
+resource "google_kms_crypto_key_iam_member" "default" {
+  crypto_key_id = google_kms_crypto_key.default.id
+  role          = "roles/cloudkms.cryptoKeyEncrypterDecrypter"
+  member        = "serviceAccount:${google_project_service_identity.eventarc_sa.email}"
+}
+# [END eventarc_advanced_terraform_cmek_role]
+
+# [START eventarc_advanced_terraform_cmek_bus]
+# Enable CMEK for an Eventarc Advanced bus
+resource "google_eventarc_message_bus" "default" {
+  location        = "us-central1"
+  message_bus_id  = "example-bus"
+  crypto_key_name = google_kms_crypto_key.default.id
+  depends_on      = [google_kms_crypto_key_iam_member.default]
+}
+# [END eventarc_advanced_terraform_cmek_bus]
+
+# [START eventarc_advanced_terraform_cmek_google_source]
+# Enable CMEK for Google API sources
+resource "google_eventarc_google_api_source" "default" {
+  location             = "us-central1"
+  google_api_source_id = "example-google-api-source"
+  destination          = google_eventarc_message_bus.default.id
+  crypto_key_name      = google_kms_crypto_key.default.id
+  depends_on           = [google_kms_crypto_key_iam_member.default]
+}
+# [END eventarc_advanced_terraform_cmek_google_source]
+
+# [START eventarc_advanced_terraform_cmek_network]
+# Create a network
+resource "google_compute_network" "default" {
+  name                    = "example-network"
+  auto_create_subnetworks = false
+}
+# [END eventarc_advanced_terraform_cmek_network]
+
+# [START eventarc_advanced_terraform_cmek_subnet]
+# Create a subnetwork
+resource "google_compute_subnetwork" "default" {
+  name                     = "example-subnetwork"
+  region                   = "us-central1"
+  network                  = google_compute_network.default.id
+  ip_cidr_range            = "10.8.0.0/24"
+  private_ip_google_access = true
+}
+# [END eventarc_advanced_terraform_cmek_subnet]
+
+# [START eventarc_advanced_terraform_cmek_netattach]
+# Create a network attachment
+resource "google_compute_network_attachment" "default" {
+  name                  = "example-network-attachment"
+  region                = "us-central1"
+  connection_preference = "ACCEPT_AUTOMATIC"
+  subnetworks = [
+    google_compute_subnetwork.default.self_link
+  ]
+}
+# [END eventarc_advanced_terraform_cmek_netattach]
+
+# [START eventarc_advanced_terraform_cmek_topic]
+# Create a Pub/Sub topic
+resource "google_pubsub_topic" "default" {
+  name = "example-topic"
+}
+# [END eventarc_advanced_terraform_cmek_topic]
+
+# [START eventarc_advanced_terraform_cmek_pipeline]
+# Enable CMEK for an Eventarc Advanced pipeline
+resource "google_eventarc_pipeline" "default" {
+  location        = "us-central1"
+  pipeline_id     = "example-pipeline"
+  crypto_key_name = google_kms_crypto_key.default.id
+  depends_on      = [google_kms_crypto_key_iam_member.default]
+  destinations {
+    topic = google_pubsub_topic.default.id
+    network_config {
+      network_attachment = google_compute_network_attachment.default.id
+    }
+    authentication_config {
+      oauth_token {
+        service_account = "${data.google_project.default.number}[email protected]"
+        scope           = "https://www.googleapis.com/auth/cloud-platform"
+      }
+    }
+  }
+}
+# [END eventarc_advanced_terraform_cmek_pipeline]