[Compute_Disk] - Add beta multi-writer support

products/compute/api.yaml

@@ -3274,6 +3274,11 @@ objects:
           resource: 'ResourcePolicy'
           imports: 'selfLink'
           description: 'A resource policy applied to this disk for automatic snapshot creations.'
+      - !ruby/object:Api::Type::Boolean
+        name: 'multiWriter'
+        description: |
+          Indicates whether or not the disk can be read/write attached to more than one instance.
+        min_version: beta
   - !ruby/object:Api::Resource
     name: 'Firewall'
     kind: 'compute#firewall'

third_party/terraform/tests/resource_compute_instance_test.go.erb

@@ -2023,6 +2023,26 @@ func TestComputeInstance_networkIPCustomizedDiff(t *testing.T) {
 	}
 }
 
+<% unless version == 'ga' -%>
+func TestAccComputeInstance_multiWriter(t *testing.T) {
+	t.Parallel()
+	instanceName := fmt.Sprintf("tf-test-%s", randString(t, 10))
+	diskName := fmt.Sprintf("tf-testd-%s", randString(t, 10))
+
+	vcrTest(t, resource.TestCase{
+		PreCheck:     func() { testAccPreCheck(t) },
+		Providers:    testAccProviders,
+		CheckDestroy: testAccCheckComputeInstanceDestroyProducer(t),
+		Steps: []resource.TestStep{
+			{
+				Config: testAccComputeInstance_multiWriter(instanceName, diskName, true),
+			},
+			computeInstanceImportStep("us-central1-a", instanceName, []string{}),
+		},
+	})
+}
+<% end -%>
+
 func testAccCheckComputeInstanceUpdateMachineType(t *testing.T, n string) resource.TestCheckFunc {
 	return func(s *terraform.State) error {
 		rs, ok := s.RootModule().Resources[n]
@@ -4898,6 +4918,50 @@ resource "google_compute_resource_policy" "foo" {
 `, instance, instance, suffix)
 }
 
+<% unless version == 'ga' -%>
+func testAccComputeInstance_multiWriter(instance string,  diskName string, enableMultiwriter bool) string {
+	return fmt.Sprintf(`
+data "google_compute_image" "my_image" {
+  family  = "debian-9"
+  project = "debian-cloud"
+}
+
+resource "google_compute_disk" "foobar" {
+  name         = "%s"
+  size         = 10
+  type         = "pd-ssd"
+	zone         = "us-central1-a"
+	multi_writer  = %t
+}
+
+resource "google_compute_instance" "foobar" {
+  name           = "%s"
+  machine_type   = "n2-standard-2"
+  zone           = "us-central1-a"
+  can_ip_forward = false
+	tags           = ["foo", "bar"]
+
+  boot_disk {
+    initialize_params {
+      image = data.google_compute_image.my_image.self_link
+    }
+	}
+
+	attached_disk {
+    source = google_compute_disk.foobar.name
+  }
+
+  network_interface {
+    network = "default"
+  }
+
+  metadata = {
+    foo = "bar"
+  }
+}
+`, diskName, enableMultiwriter, instance)
+}
+<% end -%>
 func testAccComputeInstance_subnetworkUpdate(suffix, instance string) string {
 	return fmt.Sprintf(`
 	data "google_compute_image" "my_image" {