change update method of auto_delete field

mmv1/third_party/terraform/services/compute/resource_compute_instance.go.erb

@@ -208,7 +208,6 @@ func ResourceComputeInstance() *schema.Resource {
 							Optional:     true,
 							AtLeastOneOf: bootDiskKeys,
 							Default:      true,
-							ForceNew:     true,
 							Description:  `Whether the disk will be auto-deleted when the instance is deleted.`,
 						},
 
@@ -2405,6 +2404,19 @@ func resourceComputeInstanceUpdate(d *schema.ResourceData, meta interface{}) err
 		}
 	}
 
+	// if any other boot_disk fields will be added here this should be wrapped in if d.HasChange("boot_disk")
+	if d.HasChange("boot_disk.0.auto_delete") {
+		op, err := config.NewComputeClient(userAgent).Instances.SetDiskAutoDelete(project, zone, instance.Name, d.Get("boot_disk.0.auto_delete").(bool), d.Get("boot_disk.0.device_name").(string)).Do()
+		if err != nil {
+			return errwrap.Wrapf("Error setting auto_delete : {{err}}", err)
+		}
+		opErr := ComputeOperationWaitTime(config, op, project, "changing auto_delete", userAgent, d.Timeout(schema.TimeoutUpdate))
+		if opErr != nil {
+			return opErr
+		}
+		log.Printf("[DEBUG] Successfully changed auto_delete on disk %s", instance.Disks[0].DeviceName)
+	}
+
 	// d.HasChange("service_account") is oversensitive: see https://github.com/hashicorp/terraform/issues/17411
 	// Until that's fixed, manually check whether there is a change.
 	o, n := d.GetChange("service_account")

mmv1/third_party/terraform/services/compute/resource_compute_instance_test.go.erb

@@ -3360,6 +3360,50 @@ func TestAccComputeInstance_proactiveAttributionLabel(t *testing.T) {
 	})
 }
 
+func TestAccComputeInstance_autoDeleteUpdate(t *testing.T) {
+	t.Parallel()
+
+	var instance compute.Instance
+	context_1 := map[string]interface{}{
+		"instance_name": fmt.Sprintf("tf-test-%s", acctest.RandString(t, 10)),
+		"auto_delete":   "true",
+	}
+
+	context_2 := map[string]interface{}{
+		"instance_name": context_1["instance_name"],
+		"auto_delete":   "false",
+	}
+
+	acctest.VcrTest(t, resource.TestCase{
+		PreCheck:                 func() { acctest.AccTestPreCheck(t) },
+		ProtoV5ProviderFactories: acctest.ProtoV5ProviderFactories(t),
+		CheckDestroy:             testAccCheckComputeInstanceDestroyProducer(t),
+		Steps: []resource.TestStep{
+			{
+				Config: testAccComputeInstance_autoDeleteUpdate(context_1),
+				Check: resource.ComposeTestCheckFunc(
+					testAccCheckComputeInstanceExists(t, "google_compute_instance.foobar", &instance),
+					resource.TestCheckResourceAttr("google_compute_instance.foobar", "boot_disk.0.auto_delete", "true"),
+				),
+			},
+			{
+				Config: testAccComputeInstance_autoDeleteUpdate(context_2),
+				Check: resource.ComposeTestCheckFunc(
+					testAccCheckComputeInstanceExists(t, "google_compute_instance.foobar", &instance),
+					resource.TestCheckResourceAttr("google_compute_instance.foobar", "boot_disk.0.auto_delete", "false"),
+				),
+			},
+			{
+				Config: testAccComputeInstance_autoDeleteUpdate(context_1),
+				Check: resource.ComposeTestCheckFunc(
+					testAccCheckComputeInstanceExists(t, "google_compute_instance.foobar", &instance),
+					resource.TestCheckResourceAttr("google_compute_instance.foobar", "boot_disk.0.auto_delete", "true"),
+				),
+			},
+		},
+	})
+}
+
 <% unless version == 'ga' -%>
 const errorDeleteAccessConfigWithSecPolicy = "Cannot delete an access config with a security policy set. Please remove the security policy first"
 
@@ -10569,3 +10613,29 @@ resource "google_compute_instance" "foobar" {
 }
 `, diskName, instanceName, machineType, zone, bootDiskInterface, allowStoppingForUpdate)
 }
+
+func testAccComputeInstance_autoDeleteUpdate(context map[string]interface{}) string {
+	return acctest.Nprintf(`
+data "google_compute_image" "my_image" {
+  family  = "debian-11"
+  project = "debian-cloud"
+}
+
+resource "google_compute_instance" "foobar" {
+	name = "%{instance_name}"
+	machine_type = "n1-standard-1"
+	zone = "us-central1-a"
+
+	boot_disk {
+		auto_delete = %{auto_delete}
+		initialize_params {
+			image = data.google_compute_image.my_image.self_link
+		}
+	}
+
+	network_interface {
+		network = "default"
+	}
+}
+`, context)
+}