layer1: log namespace manager summary

pkg/utils/namespace_manager.go

@@ -113,9 +113,21 @@ func NewWatcherNamespaceManager(ctx context.Context, namespaces []string, source
 func PrepareManagedNamespaceWatcher(ctx context.Context, logger *zap.Logger, component string, namespaces []string, removalStrategy NamespaceRemovalStrategy, subscriber NamespaceSubscriber) (NamespaceManager, k8sCache.ResourceEventHandlerFuncs, error) {
 	manager, err := NewWatcherNamespaceManager(ctx, namespaces, NamespaceSourceEnv, time.Now().UTC(), subscriber)
 	handlers := NewNamespaceWatcherEventHandlers(ctx, logger, component, manager, removalStrategy)
+	LogNamespaceManagerSummary(logger, component+": prepared namespace manager", manager.Summary())
 	return manager, handlers, err
 }
 
+func LogNamespaceManagerSummary(logger *zap.Logger, message string, summary NamespaceManagerSummary) {
+	if logger == nil {
+		return
+	}
+	logger.Info(message,
+		zap.Int("total_namespaces", summary.TotalNamespaces),
+		zap.Any("phase_counts", summary.PhaseCounts),
+		zap.Strings("subscribers", summary.Subscribers),
+	)
+}
+
 func NamespaceBecameUnmanaged(oldNamespace *corev1.Namespace, newNamespace *corev1.Namespace) bool {
 	if oldNamespace == nil || newNamespace == nil {
 		return false

pkg/utils/namespace_manager_test.go

@@ -475,6 +475,10 @@ func TestNamespaceManagerSummary(t *testing.T) {
 	}
 }
 
+func TestLogNamespaceManagerSummaryWithNilLogger(t *testing.T) {
+	LogNamespaceManagerSummary(nil, "ignored", NamespaceManagerSummary{TotalNamespaces: 1})
+}
+
 func TestNamespaceManagerDispatchAdd(t *testing.T) {
 	manager := NewNamespaceManager()
 	manager.Upsert(NamespaceEvent{Type: NamespaceEventAdd, Name: "tenant-a", Source: NamespaceSourceWatcher})