sched: start dynamicInformerFactory along with regular informerFactory (#105016)

* sched: start dynamicInformerFactory along with regular informerFactory

* fixup: start all informers and then wait for their syncs

cmd/kube-scheduler/app/config/config.go

@@ -18,6 +18,7 @@ package config
 
 import (
 	apiserver "k8s.io/apiserver/pkg/server"
+	"k8s.io/client-go/dynamic/dynamicinformer"
 	"k8s.io/client-go/informers"
 	clientset "k8s.io/client-go/kubernetes"
 	restclient "k8s.io/client-go/rest"
@@ -40,9 +41,10 @@ type Config struct {
 	Authorization  apiserver.AuthorizationInfo
 	SecureServing  *apiserver.SecureServingInfo
 
-	Client          clientset.Interface
-	KubeConfig      *restclient.Config
-	InformerFactory informers.SharedInformerFactory
+	Client             clientset.Interface
+	KubeConfig         *restclient.Config
+	InformerFactory    informers.SharedInformerFactory
+	DynInformerFactory dynamicinformer.DynamicSharedInformerFactory
 
 	//lint:ignore SA1019 this deprecated field still needs to be used for now. It will be removed once the migration is done.
 	EventBroadcaster events.EventBroadcasterAdapter

cmd/kube-scheduler/app/options/options.go

@@ -27,6 +27,8 @@ import (
 	"k8s.io/apimachinery/pkg/util/uuid"
 	apiserveroptions "k8s.io/apiserver/pkg/server/options"
 	utilfeature "k8s.io/apiserver/pkg/util/feature"
+	"k8s.io/client-go/dynamic"
+	"k8s.io/client-go/dynamic/dynamicinformer"
 	clientset "k8s.io/client-go/kubernetes"
 	restclient "k8s.io/client-go/rest"
 	"k8s.io/client-go/tools/clientcmd"
@@ -284,6 +286,8 @@ func (o *Options) Config() (*schedulerappconfig.Config, error) {
 	c.Client = client
 	c.KubeConfig = kubeConfig
 	c.InformerFactory = scheduler.NewInformerFactory(client, 0)
+	dynClient := dynamic.NewForConfigOrDie(kubeConfig)
+	c.DynInformerFactory = dynamicinformer.NewFilteredDynamicSharedInformerFactory(dynClient, 0, corev1.NamespaceAll, nil)
 	c.LeaderElection = leaderElectionConfig
 
 	return c, nil

cmd/kube-scheduler/app/server.go

@@ -180,9 +180,17 @@ func Run(ctx context.Context, cc *schedulerserverconfig.CompletedConfig, sched *
 
 	// Start all informers.
 	cc.InformerFactory.Start(ctx.Done())
+	// DynInformerFactory can be nil in tests.
+	if cc.DynInformerFactory != nil {
+		cc.DynInformerFactory.Start(ctx.Done())
+	}
 
 	// Wait for all caches to sync before scheduling.
 	cc.InformerFactory.WaitForCacheSync(ctx.Done())
+	// DynInformerFactory can be nil in tests.
+	if cc.DynInformerFactory != nil {
+		cc.DynInformerFactory.WaitForCacheSync(ctx.Done())
+	}
 
 	// If leader election is enabled, runCommand via LeaderElector until done and exit.
 	if cc.LeaderElection != nil {
@@ -303,6 +311,7 @@ func Setup(ctx context.Context, opts *options.Options, outOfTreeRegistryOptions
 	// Create the scheduler.
 	sched, err := scheduler.New(cc.Client,
 		cc.InformerFactory,
+		cc.DynInformerFactory,
 		recorderFactory,
 		ctx.Done(),
 		scheduler.WithComponentConfigVersion(cc.ComponentConfig.TypeMeta.APIVersion),