Add fields for unified migration (#428)

instances.go

@@ -35,6 +35,13 @@ const (
 	InstanceResizing     InstanceStatus = "resizing"
 )
 
+type InstanceMigrationType string
+
+const (
+	WarmMigration InstanceMigrationType = "warm"
+	ColdMigration InstanceMigrationType = "cold"
+)
+
 // Instance represents a linode object
 type Instance struct {
 	ID              int             `json:"id"`
@@ -192,12 +199,19 @@ type InstanceCloneOptions struct {
 
 // InstanceResizeOptions is an options struct used when resizing an instance
 type InstanceResizeOptions struct {
-	Type string `json:"type"`
+	Type          string                `json:"type"`
+	MigrationType InstanceMigrationType `json:"migration_type,omitempty"`
 
 	// When enabled, an instance resize will also resize a data disk if the instance has no more than one data disk and one swap disk
 	AllowAutoDiskResize *bool `json:"allow_auto_disk_resize,omitempty"`
 }
 
+// InstanceResizeOptions is an options struct used when resizing an instance
+type InstanceMigrateOptions struct {
+	Type   InstanceMigrationType `json:"type,omitempty"`
+	Region string                `json:"region,omitempty"`
+}
+
 // InstancesPagedResponse represents a linode API response for listing
 type InstancesPagedResponse struct {
 	*PageOptions
@@ -417,8 +431,14 @@ func (c *Client) MutateInstance(ctx context.Context, id int) error {
 }
 
 // MigrateInstance - Migrate an instance
-func (c *Client) MigrateInstance(ctx context.Context, id int) error {
-	return c.simpleInstanceAction(ctx, "migrate", id)
+func (c *Client) MigrateInstance(ctx context.Context, linodeID int, opts InstanceMigrateOptions) error {
+	body, err := json.Marshal(opts)
+	if err != nil {
+		return err
+	}
+	e := fmt.Sprintf("linode/instances/%d/migrate", linodeID)
+	_, err = coupleAPIErrors(c.R(ctx).SetBody(string(body)).Post(e))
+	return err
 }
 
 // simpleInstanceAction is a helper for Instance actions that take no parameters

test/integration/instances_test.go

@@ -79,6 +79,45 @@ func TestInstance_Get_smoke(t *testing.T) {
 	assertDateSet(t, instance.Updated)
 }
 
+func TestInstance_Resize(t *testing.T) {
+	client, instance, teardown, err := setupInstance(
+		t,
+		"fixtures/TestInstance_Resize",
+		func(client *linodego.Client, options *linodego.InstanceCreateOptions) {
+			boot := true
+			options.Type = "g6-nanode-1"
+			options.Booted = &boot
+		},
+	)
+
+	defer teardown()
+	if err != nil {
+		t.Error(err)
+	}
+
+	instance, err = client.WaitForInstanceStatus(
+		context.Background(),
+		instance.ID,
+		linodego.InstanceRunning,
+		180,
+	)
+	if err != nil {
+		t.Errorf("Error waiting for instance readiness for resize: %s", err.Error())
+	}
+
+	err = client.ResizeInstance(
+		context.Background(),
+		instance.ID,
+		linodego.InstanceResizeOptions{
+			Type: "g6-standard-1",
+			MigrationType: "warm",
+		},
+	)
+	if err != nil {
+		t.Errorf("failed to resize instance %d: %v", instance.ID, err.Error())
+	}
+}
+
 func TestInstance_Disks_List(t *testing.T) {
 	client, instance, teardown, err := setupInstance(t, "fixtures/TestInstance_Disks_List")
 	defer teardown()