fix: namespaced kruise-controller panic due to multiNamespaceCache

main.go

@@ -247,19 +247,25 @@ func main() {
 			setupLog.Error(err, "unable to wait webhook ready")
 			os.Exit(1)
 		}
-
-		setupLog.Info("setup controllers")
-		if err = controller.SetupWithManager(mgr); err != nil {
-			setupLog.Error(err, "unable to setup controllers")
-			os.Exit(1)
-		}
 	}()
 
+	setupLog.Info("setup controllers")
+	if err = controller.SetupWithManager(mgr); err != nil {
+		setupLog.Error(err, "unable to setup controllers")
+		os.Exit(1)
+	}
+
 	setupLog.Info("starting manager")
 	if err := mgr.Start(ctx); err != nil {
 		setupLog.Error(err, "problem running manager")
 		os.Exit(1)
 	}
+
+	setupLog.Info("setup controllers that need manager started")
+	if err = controller.SetupAfterStart(mgr); err != nil {
+		setupLog.Error(err, "unable to setup controllers after manager start")
+		os.Exit(1)
+	}
 }
 
 func setRestConfig(c *rest.Config) {

pkg/controller/controllers.go

@@ -44,6 +44,7 @@ import (
 )
 
 var controllerAddFuncs []func(manager.Manager) error
+var controllerAddAfterStarts []func(manager.Manager) error
 
 func init() {
 	controllerAddFuncs = append(controllerAddFuncs, advancedcronjob.Add)
@@ -58,15 +59,16 @@ func init() {
 	controllerAddFuncs = append(controllerAddFuncs, statefulset.Add)
 	controllerAddFuncs = append(controllerAddFuncs, uniteddeployment.Add)
 	controllerAddFuncs = append(controllerAddFuncs, podunavailablebudget.Add)
-	controllerAddFuncs = append(controllerAddFuncs, workloadspread.Add)
 	controllerAddFuncs = append(controllerAddFuncs, resourcedistribution.Add)
 	controllerAddFuncs = append(controllerAddFuncs, ephemeraljob.Add)
 	controllerAddFuncs = append(controllerAddFuncs, containerlauchpriority.Add)
-	controllerAddFuncs = append(controllerAddFuncs, persistentpodstate.Add)
 	controllerAddFuncs = append(controllerAddFuncs, sidecarterminator.Add)
 	controllerAddFuncs = append(controllerAddFuncs, podprobemarker.Add)
 	controllerAddFuncs = append(controllerAddFuncs, nodepodprobe.Add)
 	controllerAddFuncs = append(controllerAddFuncs, imagelistpulljob.Add)
+
+	controllerAddAfterStarts = append(controllerAddAfterStarts, workloadspread.Add)
+	controllerAddAfterStarts = append(controllerAddAfterStarts, persistentpodstate.Add)
 }
 
 func SetupWithManager(m manager.Manager) error {
@@ -81,3 +83,16 @@ func SetupWithManager(m manager.Manager) error {
 	}
 	return nil
 }
+
+func SetupAfterStart(m manager.Manager) error {
+	for _, f := range controllerAddAfterStarts {
+		if err := f(m); err != nil {
+			if kindMatchErr, ok := err.(*meta.NoKindMatchError); ok {
+				klog.InfoS("CRD is not installed, its controller will perform noops!", "CRD", kindMatchErr.GroupKind)
+				continue
+			}
+			return err
+		}
+	}
+	return nil
+}

pkg/controller/daemonset/daemonset_controller.go

@@ -40,7 +40,6 @@
 	v1core "k8s.io/client-go/kubernetes/typed/core/v1"
 	appslisters "k8s.io/client-go/listers/apps/v1"
 	corelisters "k8s.io/client-go/listers/core/v1"
-	"k8s.io/client-go/tools/cache"
 	"k8s.io/client-go/tools/record"
 	"k8s.io/client-go/util/flowcontrol"
 	"k8s.io/client-go/util/retry"
@@ -66,6 +65,7 @@
 	kruiseclientset "github.com/openkruise/kruise/pkg/client/clientset/versioned"
 	"github.com/openkruise/kruise/pkg/client/clientset/versioned/scheme"
 	kruiseappslisters "github.com/openkruise/kruise/pkg/client/listers/apps/v1alpha1"
+	controllerutil "github.com/openkruise/kruise/pkg/controller/util"
 	"github.com/openkruise/kruise/pkg/features"
 	kruiseutil "github.com/openkruise/kruise/pkg/util"
 	utilclient "github.com/openkruise/kruise/pkg/util/client"
@@ -172,10 +172,10 @@
 		return nil, err
 	}
 
-	dsLister := kruiseappslisters.NewDaemonSetLister(dsInformer.(cache.SharedIndexInformer).GetIndexer())
-	historyLister := appslisters.NewControllerRevisionLister(revInformer.(cache.SharedIndexInformer).GetIndexer())
-	podLister := corelisters.NewPodLister(podInformer.(cache.SharedIndexInformer).GetIndexer())
-	nodeLister := corelisters.NewNodeLister(nodeInformer.(cache.SharedIndexInformer).GetIndexer())
+	dsLister := kruiseappslisters.NewDaemonSetLister(controllerutil.GetCacheIndexer(dsInformer))
+	historyLister := appslisters.NewControllerRevisionLister(controllerutil.GetCacheIndexer(revInformer))
+	podLister := corelisters.NewPodLister(controllerutil.GetCacheIndexer(podInformer))
+	nodeLister := corelisters.NewNodeLister(controllerutil.GetCacheIndexer(nodeInformer))
 	failedPodsBackoff := flowcontrol.NewBackOff(1*time.Second, 15*time.Minute)
 	revisionAdapter := revisionadapter.NewDefaultImpl()
 

pkg/controller/statefulset/statefulset_controller.go

@@ -35,7 +35,6 @@
 	appslisters "k8s.io/client-go/listers/apps/v1"
 	corelisters "k8s.io/client-go/listers/core/v1"
 	storagelisters "k8s.io/client-go/listers/storage/v1"
-	toolscache "k8s.io/client-go/tools/cache"
 	"k8s.io/client-go/tools/record"
 	"k8s.io/klog/v2"
 	kubecontroller "k8s.io/kubernetes/pkg/controller"
@@ -54,6 +53,7 @@
 	"github.com/openkruise/kruise/pkg/client"
 	kruiseclientset "github.com/openkruise/kruise/pkg/client/clientset/versioned"
 	kruiseappslisters "github.com/openkruise/kruise/pkg/client/listers/apps/v1beta1"
+	controllerutil "github.com/openkruise/kruise/pkg/controller/util"
 	"github.com/openkruise/kruise/pkg/features"
 	"github.com/openkruise/kruise/pkg/util"
 	utilclient "github.com/openkruise/kruise/pkg/util/client"
@@ -133,10 +133,10 @@
 		return nil, err
 	}
 
-	statefulSetLister := kruiseappslisters.NewStatefulSetLister(statefulSetInformer.(toolscache.SharedIndexInformer).GetIndexer())
-	podLister := corelisters.NewPodLister(podInformer.(toolscache.SharedIndexInformer).GetIndexer())
-	pvcLister := corelisters.NewPersistentVolumeClaimLister(pvcInformer.(toolscache.SharedIndexInformer).GetIndexer())
-	scLister := storagelisters.NewStorageClassLister(scInformer.(toolscache.SharedIndexInformer).GetIndexer())
+	statefulSetLister := kruiseappslisters.NewStatefulSetLister(controllerutil.GetCacheIndexer(statefulSetInformer))
+	podLister := corelisters.NewPodLister(controllerutil.GetCacheIndexer(podInformer))
+	pvcLister := corelisters.NewPersistentVolumeClaimLister(controllerutil.GetCacheIndexer(pvcInformer))
+	scLister := storagelisters.NewStorageClassLister(controllerutil.GetCacheIndexer(scInformer))
 
 	genericClient := client.GetGenericClientWithName("statefulset-controller")
 	eventBroadcaster := record.NewBroadcaster()
@@ -159,7 +159,7 @@
 			inplaceupdate.New(utilclient.NewClientFromManager(mgr, "statefulset-controller"), revisionadapter.NewDefaultImpl()),
 			lifecycle.New(utilclient.NewClientFromManager(mgr, "statefulset-controller")),
 			NewRealStatefulSetStatusUpdater(genericClient.KruiseClient, statefulSetLister),
-			history.NewHistory(genericClient.KubeClient, appslisters.NewControllerRevisionLister(revInformer.(toolscache.SharedIndexInformer).GetIndexer())),
+			history.NewHistory(genericClient.KubeClient, appslisters.NewControllerRevisionLister(controllerutil.GetCacheIndexer(revInformer))),
 			recorder,
 		),
 		podControl: kubecontroller.RealPodControl{KubeClient: genericClient.KubeClient, Recorder: recorder},

pkg/controller/util/cache.go

@@ -0,0 +1,20 @@
+package util
+
+import (
+	"k8s.io/client-go/tools/cache"
+	toolscache "sigs.k8s.io/controller-runtime/pkg/cache"
+)
+
+// GetCacheIndexer helps to get the cache indexer from the informer
+func GetCacheIndexer(informer toolscache.Informer) cache.Indexer {
+	shardIndexInformer, ok := informer.(cache.SharedIndexInformer)
+	if ok {
+		return shardIndexInformer.GetIndexer()
+	}
+	indexers := cache.Indexers{}
+	err := informer.(toolscache.Informer).AddIndexers(indexers)
+	if err != nil {
+		panic(err)
+	}
+	return cache.NewIndexer(cache.DeletionHandlingMetaNamespaceKeyFunc, indexers)
+}