Improve ErrNoService to describe the name of missing service

kubernetes/service.go

@@ -59,10 +59,13 @@ var (
 )
 
 // ErrNoService indicates that the app has no service running
-type ErrNoService struct{ App string }
+type ErrNoService struct {
+	App     string
+	Service string
+}
 
 func (e ErrNoService) Error() string {
-	return fmt.Sprintf("no service found for app %q", e.App)
+	return fmt.Sprintf("service %q is not found for app %q", e.Service, e.App)
 }
 
 // BaseService has the base functionality needed by router.Service implementations
@@ -154,7 +157,7 @@ func (k *BaseService) getWebService(ctx context.Context, appName string, target
 	svc, err := client.CoreV1().Services(target.Namespace).Get(ctx, target.Service, metav1.GetOptions{})
 	if err != nil {
 		if k8sErrors.IsNotFound(err) {
-			return nil, ErrNoService{App: appName}
+			return nil, ErrNoService{App: appName, Service: target.Service}
 		}
 		return nil, err
 	}

kubernetes/service_test.go

@@ -30,7 +30,7 @@ func TestGetWebService(t *testing.T) {
 	}
 
 	_, err := svc.getWebService(ctx, "test", router.BackendTarget{Service: "test-not-found", Namespace: svc.Namespace})
-	assert.Equal(t, ErrNoService{App: "test"}, err)
+	assert.Equal(t, ErrNoService{App: "test", Service: "test-not-found"}, err)
 
 	svc1 := v1.Service{ObjectMeta: metav1.ObjectMeta{
 		Name:      "test-single",