Pub/Sub Topic CMEK/KMS support

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

google/resource_pubsub_topic.go

@@ -48,6 +48,11 @@ func resourcePubsubTopic() *schema.Resource {
 				ForceNew:         true,
 				DiffSuppressFunc: compareSelfLinkOrResourceName,
 			},
+			"kms_key_name": {
+				Type:     schema.TypeString,
+				Optional: true,
+				ForceNew: true,
+			},
 			"labels": {
 				Type:     schema.TypeMap,
 				Optional: true,
@@ -73,6 +78,12 @@ func resourcePubsubTopicCreate(d *schema.ResourceData, meta interface{}) error {
 	} else if v, ok := d.GetOkExists("name"); !isEmptyValue(reflect.ValueOf(nameProp)) && (ok || !reflect.DeepEqual(v, nameProp)) {
 		obj["name"] = nameProp
 	}
+	kmsKeyNameProp, err := expandPubsubTopicKmsKeyName(d.Get("kms_key_name"), d, config)
+	if err != nil {
+		return err
+	} else if v, ok := d.GetOkExists("kms_key_name"); !isEmptyValue(reflect.ValueOf(kmsKeyNameProp)) && (ok || !reflect.DeepEqual(v, kmsKeyNameProp)) {
+		obj["kmsKeyName"] = kmsKeyNameProp
+	}
 	labelsProp, err := expandPubsubTopicLabels(d.Get("labels"), d, config)
 	if err != nil {
 		return err
@@ -132,6 +143,9 @@ func resourcePubsubTopicRead(d *schema.ResourceData, meta interface{}) error {
 	if err := d.Set("name", flattenPubsubTopicName(res["name"], d)); err != nil {
 		return fmt.Errorf("Error reading Topic: %s", err)
 	}
+	if err := d.Set("kms_key_name", flattenPubsubTopicKmsKeyName(res["kmsKeyName"], d)); err != nil {
+		return fmt.Errorf("Error reading Topic: %s", err)
+	}
 	if err := d.Set("labels", flattenPubsubTopicLabels(res["labels"], d)); err != nil {
 		return fmt.Errorf("Error reading Topic: %s", err)
 	}
@@ -223,6 +237,10 @@ func flattenPubsubTopicName(v interface{}, d *schema.ResourceData) interface{} {
 	return NameFromSelfLinkStateFunc(v)
 }
 
+func flattenPubsubTopicKmsKeyName(v interface{}, d *schema.ResourceData) interface{} {
+	return v
+}
+
 func flattenPubsubTopicLabels(v interface{}, d *schema.ResourceData) interface{} {
 	return v
 }
@@ -231,6 +249,10 @@ func expandPubsubTopicName(v interface{}, d TerraformResourceData, config *Confi
 	return GetResourceNameFromSelfLink(v.(string)), nil
 }
 
+func expandPubsubTopicKmsKeyName(v interface{}, d TerraformResourceData, config *Config) (interface{}, error) {
+	return v, nil
+}
+
 func expandPubsubTopicLabels(v interface{}, d TerraformResourceData, config *Config) (map[string]string, error) {
 	if v == nil {
 		return map[string]string{}, nil

google/resource_pubsub_topic_test.go

@@ -40,6 +40,29 @@ func TestAccPubsubTopic_update(t *testing.T) {
 	})
 }
 
+func TestAccPubsubTopic_cmek(t *testing.T) {
+	t.Parallel()
+
+	kms := BootstrapKMSKey(t)
+	pid := getTestProjectFromEnv()
+	topicName := fmt.Sprintf("tf-test-%s", acctest.RandString(10))
+
+	resource.Test(t, resource.TestCase{
+		PreCheck:  func() { testAccPreCheck(t) },
+		Providers: testAccProviders,
+		Steps: []resource.TestStep{
+			{
+				Config: testAccPubsubTopic_cmek(pid, topicName, kms.CryptoKey.Name),
+			},
+			{
+				ResourceName:      "google_pubsub_topic.topic",
+				ImportState:       true,
+				ImportStateVerify: true,
+			},
+		},
+	})
+}
+
 func testAccPubsubTopic_update(topic, key, value string) string {
 	return fmt.Sprintf(`
 resource "google_pubsub_topic" "foo" {
@@ -50,3 +73,23 @@ resource "google_pubsub_topic" "foo" {
 }
 `, topic, key, value)
 }
+
+func testAccPubsubTopic_cmek(pid, topicName, kmsKey string) string {
+	return fmt.Sprintf(`
+data "google_project" "project" {
+  project_id = "%s"
+}
+
+resource "google_project_iam_member" "kms-project-binding" {
+  project = "${data.google_project.project.project_id}"
+  role    = "roles/cloudkms.cryptoKeyEncrypterDecrypter"
+  member  = "serviceAccount:service-${data.google_project.project.number}@gcp-sa-pubsub.iam.gserviceaccount.com"
+}
+
+resource "google_pubsub_topic" "topic" {
+  name         = "%s"
+  project      = "${data.google_project.project.project_id}"
+  kms_key_name = "%s"
+}
+`, pid, topicName, kmsKey)
+}

website/docs/r/pubsub_topic.html.markdown

@@ -47,6 +47,25 @@ resource "google_pubsub_topic" "example" {
   }
 }
 ```
+## Example Usage - Pubsub Topic Cmek
+
+
+```hcl
+resource "google_pubsub_topic" "example" {
+  name         = "example-topic"
+  kms_key_name = "${google_kms_crypto_key.crypto_key.self_link}"
+}
+
+resource "google_kms_crypto_key" "crypto_key" {
+  name     = "example-key"
+  key_ring = "${google_kms_key_ring.key_ring.self_link}"
+}
+
+resource "google_kms_key_ring" "key_ring" {
+  name     = "example-keyring"
+  location = "global"
+}
+```
 
 ## Argument Reference
 
@@ -61,6 +80,12 @@ The following arguments are supported:
 - - -
 
 
+* `kms_key_name` -
+  (Optional)
+  The resource name of the Cloud KMS CryptoKey to be used to protect access
+  to messsages published on this topic.
+  The expected format is `projects/*/locations/*/keyRings/*/cryptoKeys/*`
+
 * `labels` -
   (Optional)
   A set of key/value label pairs to assign to this Topic.