warn when mesh/metrics provider or canary target type isn't valid

fixes #1872

Signed-off-by: Mara Furland <mara@fur.land>

Author: mtfurlan

pkg/canary/factory.go

@@ -93,6 +93,7 @@ func (factory *Factory) Controller(obj v1beta1.LocalObjectReference) Controller
 			return serviceCtrl
 		}
 	default:
+		factory.logger.Warnf("unknown canary target '%s', assuming deployment", obj.Kind)
 		return deploymentCtrl
 	}
 }
@@ -118,6 +119,7 @@ func (factory *Factory) ScalerReconciler(kind string) ScalerReconciler {
 	case "ScaledObject":
 		return soReconciler
 	default:
+		factory.logger.Errorf("unknown hpa kind '%s'")
 		return nil
 	}
 }

pkg/controller/scheduler_metrics.go

@@ -74,7 +74,7 @@ func (c *Controller) checkMetricProviderAvailability(canary *flaggerv1.Canary) e
 				credentials = secret.Data
 			}
 
-			factory := providers.Factory{}
+			factory := providers.NewFactory(c.logger)
 			provider, err := factory.Provider(metric.Interval, template.Spec.Provider, credentials, c.kubeConfig)
 			if err != nil {
 				return fmt.Errorf("metric template %s.%s provider %s error: %v",
@@ -292,7 +292,7 @@ func (c *Controller) runMetricChecks(canary *flaggerv1.Canary) bool {
 				credentials = secret.Data
 			}
 
-			factory := providers.Factory{}
+			factory := providers.NewFactory(c.logger)
 			provider, err := factory.Provider(metric.Interval, template.Spec.Provider, credentials, c.kubeConfig)
 			if err != nil {
 				c.recordEventErrorf(canary, "Metric template %s.%s provider %s error: %v",

pkg/metrics/providers/factory.go

@@ -18,10 +18,19 @@ package providers
 
 import (
 	flaggerv1 "github.com/fluxcd/flagger/pkg/apis/flagger/v1beta1"
+	"go.uber.org/zap"
 	rest "k8s.io/client-go/rest"
 )
 
-type Factory struct{}
+type Factory struct {
+	logger *zap.SugaredLogger
+}
+
+func NewFactory(logger *zap.SugaredLogger) *Factory {
+	return &Factory{
+		logger: logger,
+	}
+}
 
 func (factory Factory) Provider(metricInterval string, provider flaggerv1.MetricTemplateProvider, credentials map[string][]byte, config *rest.Config) (Interface, error) {
 	switch provider.Type {
@@ -46,6 +55,7 @@ func (factory Factory) Provider(metricInterval string, provider flaggerv1.Metric
 	case "splunk":
 		return NewSplunkProvider(metricInterval, provider, credentials)
 	default:
+		factory.logger.Warnf("unknown metrics provider '%s', using prometheus", provider.Type)
 		return NewPrometheusProvider(provider, credentials)
 	}
 }

pkg/router/factory.go

@@ -224,6 +224,7 @@ func (factory *Factory) MeshRouter(provider string, labelSelector string) Interf
 	case provider == flaggerv1.KubernetesProvider:
 		return &NopRouter{}
 	default:
+		factory.logger.Warnf("unknown mesh router provider '%s', using istio", provider)
 		return &IstioRouter{
 			logger:        factory.logger,
 			flaggerClient: factory.flaggerClient,