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controllermanager.go
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controllermanager.go
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package app
import (
"context"
"flag"
"fmt"
"os"
"time"
"github.com/spf13/cobra"
"k8s.io/client-go/discovery"
"k8s.io/client-go/dynamic"
"k8s.io/component-base/logs"
"k8s.io/klog/v2"
"sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/event"
"sigs.k8s.io/controller-runtime/pkg/healthz"
"sigs.k8s.io/controller-runtime/pkg/predicate"
"github.com/karmada-io/karmada/cmd/controller-manager/app/options"
"github.com/karmada-io/karmada/pkg/apis/cluster/v1alpha1"
workv1alpha1 "github.com/karmada-io/karmada/pkg/apis/work/v1alpha1"
"github.com/karmada-io/karmada/pkg/controllers/binding"
"github.com/karmada-io/karmada/pkg/controllers/cluster"
"github.com/karmada-io/karmada/pkg/controllers/execution"
"github.com/karmada-io/karmada/pkg/controllers/hpa"
"github.com/karmada-io/karmada/pkg/controllers/namespace"
"github.com/karmada-io/karmada/pkg/controllers/propagationpolicy"
"github.com/karmada-io/karmada/pkg/controllers/status"
"github.com/karmada-io/karmada/pkg/util"
"github.com/karmada-io/karmada/pkg/util/detector"
"github.com/karmada-io/karmada/pkg/util/gclient"
"github.com/karmada-io/karmada/pkg/util/informermanager"
"github.com/karmada-io/karmada/pkg/util/names"
"github.com/karmada-io/karmada/pkg/util/objectwatcher"
"github.com/karmada-io/karmada/pkg/util/overridemanager"
)
// NewControllerManagerCommand creates a *cobra.Command object with default parameters
func NewControllerManagerCommand(ctx context.Context) *cobra.Command {
opts := options.NewOptions()
cmd := &cobra.Command{
Use: "controller-manager",
Long: `The controller manager runs a bunch of controllers`,
Run: func(cmd *cobra.Command, args []string) {
opts.Complete()
if err := Run(ctx, opts); err != nil {
fmt.Fprintf(os.Stderr, "%v\n", err)
os.Exit(1)
}
},
}
cmd.Flags().AddGoFlagSet(flag.CommandLine)
opts.AddFlags(cmd.Flags())
return cmd
}
// Run runs the controller-manager with options. This should never exit.
func Run(ctx context.Context, opts *options.Options) error {
logs.InitLogs()
defer logs.FlushLogs()
config, err := controllerruntime.GetConfig()
if err != nil {
panic(err)
}
controllerManager, err := controllerruntime.NewManager(config, controllerruntime.Options{
Scheme: gclient.NewSchema(),
LeaderElection: true, // TODO(RainbowMango): Add a flag '--enable-leader-election' for this option.
LeaderElectionID: "41db11fa.karmada.io",
HealthProbeBindAddress: fmt.Sprintf("%s:%d", opts.BindAddress, opts.SecurePort),
LivenessEndpointName: "/healthz",
})
if err != nil {
klog.Errorf("failed to build controller manager: %v", err)
return err
}
if err = controllerManager.AddHealthzCheck("ping", healthz.Ping); err != nil {
klog.Errorf("failed to add health check endpoint: %v", err)
return err
}
setupControllers(controllerManager, opts, ctx.Done())
// blocks until the stop channel is closed.
if err := controllerManager.Start(ctx); err != nil {
klog.Errorf("controller manager exits unexpectedly: %v", err)
return err
}
// never reach here
return nil
}
func setupControllers(mgr controllerruntime.Manager, opts *options.Options, stopChan <-chan struct{}) {
resetConfig := mgr.GetConfig()
dynamicClientSet := dynamic.NewForConfigOrDie(resetConfig)
discoverClientSet := discovery.NewDiscoveryClientForConfigOrDie(resetConfig)
objectWatcher := objectwatcher.NewObjectWatcher(mgr.GetClient(), mgr.GetRESTMapper(), util.NewClusterDynamicClientSet)
overrideManager := overridemanager.New(mgr.GetClient())
resourceDetector := &detector.ResourceDetector{
DiscoveryClientSet: discoverClientSet,
Client: mgr.GetClient(),
InformerManager: informermanager.NewSingleClusterInformerManager(dynamicClientSet, 0),
RESTMapper: mgr.GetRESTMapper(),
DynamicClient: dynamicClientSet,
}
resourceDetector.EventHandler = informermanager.NewFilteringHandlerOnAllEvents(resourceDetector.EventFilter, resourceDetector.OnAdd, resourceDetector.OnUpdate, resourceDetector.OnDelete)
resourceDetector.Processor = util.NewAsyncWorker("resource detector", time.Microsecond, detector.ClusterWideKeyFunc, resourceDetector.Reconcile)
if err := mgr.Add(resourceDetector); err != nil {
klog.Fatalf("Failed to setup resource detector: %v", err)
}
clusterController := &cluster.Controller{
Client: mgr.GetClient(),
EventRecorder: mgr.GetEventRecorderFor(cluster.ControllerName),
}
if err := clusterController.SetupWithManager(mgr); err != nil {
klog.Fatalf("Failed to setup cluster controller: %v", err)
}
clusterPredicateFunc := predicate.Funcs{
CreateFunc: func(createEvent event.CreateEvent) bool {
obj := createEvent.Object.(*v1alpha1.Cluster)
return obj.Spec.SyncMode == v1alpha1.Push
},
UpdateFunc: func(updateEvent event.UpdateEvent) bool {
obj := updateEvent.ObjectNew.(*v1alpha1.Cluster)
return obj.Spec.SyncMode == v1alpha1.Push
},
DeleteFunc: func(deleteEvent event.DeleteEvent) bool {
obj := deleteEvent.Object.(*v1alpha1.Cluster)
return obj.Spec.SyncMode == v1alpha1.Push
},
GenericFunc: func(genericEvent event.GenericEvent) bool {
return false
},
}
clusterStatusController := &status.ClusterStatusController{
Client: mgr.GetClient(),
EventRecorder: mgr.GetEventRecorderFor(status.ControllerName),
PredicateFunc: clusterPredicateFunc,
ClusterClientSetFunc: util.NewClusterClientSet,
ClusterStatusUpdateFrequency: opts.ClusterStatusUpdateFrequency,
}
if err := clusterStatusController.SetupWithManager(mgr); err != nil {
klog.Fatalf("Failed to setup cluster status controller: %v", err)
}
hpaController := &hpa.HorizontalPodAutoscalerController{
Client: mgr.GetClient(),
DynamicClient: dynamicClientSet,
EventRecorder: mgr.GetEventRecorderFor(hpa.ControllerName),
RESTMapper: mgr.GetRESTMapper(),
}
if err := hpaController.SetupWithManager(mgr); err != nil {
klog.Fatalf("Failed to setup hpa controller: %v", err)
}
policyController := &propagationpolicy.Controller{
Client: mgr.GetClient(),
}
if err := policyController.SetupWithManager(mgr); err != nil {
klog.Fatalf("Failed to setup policy controller: %v", err)
}
bindingController := &binding.ResourceBindingController{
Client: mgr.GetClient(),
DynamicClient: dynamicClientSet,
EventRecorder: mgr.GetEventRecorderFor(binding.ControllerName),
RESTMapper: mgr.GetRESTMapper(),
OverrideManager: overrideManager,
}
if err := bindingController.SetupWithManager(mgr); err != nil {
klog.Fatalf("Failed to setup binding controller: %v", err)
}
clusterResourceBindingController := &binding.ClusterResourceBindingController{
Client: mgr.GetClient(),
DynamicClient: dynamicClientSet,
EventRecorder: mgr.GetEventRecorderFor(binding.ClusterResourceBindingControllerName),
RESTMapper: mgr.GetRESTMapper(),
OverrideManager: overrideManager,
}
if err := clusterResourceBindingController.SetupWithManager(mgr); err != nil {
klog.Fatalf("Failed to setup cluster resource binding controller: %v", err)
}
workPredicateFunc := newPredicateFuncsForWork(mgr)
executionController := &execution.Controller{
Client: mgr.GetClient(),
EventRecorder: mgr.GetEventRecorderFor(execution.ControllerName),
RESTMapper: mgr.GetRESTMapper(),
ObjectWatcher: objectWatcher,
PredicateFunc: workPredicateFunc,
ClusterClientSetFunc: util.NewClusterDynamicClientSet,
}
if err := executionController.SetupWithManager(mgr); err != nil {
klog.Fatalf("Failed to setup execution controller: %v", err)
}
workStatusController := &status.WorkStatusController{
Client: mgr.GetClient(),
EventRecorder: mgr.GetEventRecorderFor(status.WorkStatusControllerName),
RESTMapper: mgr.GetRESTMapper(),
InformerManager: informermanager.NewMultiClusterInformerManager(),
StopChan: stopChan,
WorkerNumber: 1,
ObjectWatcher: objectWatcher,
PredicateFunc: workPredicateFunc,
ClusterClientSetFunc: util.NewClusterDynamicClientSet,
}
workStatusController.RunWorkQueue()
if err := workStatusController.SetupWithManager(mgr); err != nil {
klog.Fatalf("Failed to setup work status controller: %v", err)
}
namespaceSyncController := &namespace.Controller{
Client: mgr.GetClient(),
EventRecorder: mgr.GetEventRecorderFor(namespace.ControllerName),
}
if err := namespaceSyncController.SetupWithManager(mgr); err != nil {
klog.Fatalf("Failed to setup namespace sync controller: %v", err)
}
}
func newPredicateFuncsForWork(mgr controllerruntime.Manager) predicate.Funcs {
return predicate.Funcs{
CreateFunc: func(createEvent event.CreateEvent) bool {
obj := createEvent.Object.(*workv1alpha1.Work)
clusterName, err := names.GetClusterName(obj.Namespace)
if err != nil {
klog.Errorf("Failed to get member cluster name for work %s/%s", obj.Namespace, obj.Name)
return false
}
clusterObj, err := util.GetCluster(mgr.GetClient(), clusterName)
if err != nil {
klog.Errorf("Failed to get the given member cluster %s", clusterName)
return false
}
return clusterObj.Spec.SyncMode == v1alpha1.Push
},
UpdateFunc: func(updateEvent event.UpdateEvent) bool {
obj := updateEvent.ObjectNew.(*workv1alpha1.Work)
clusterName, err := names.GetClusterName(obj.Namespace)
if err != nil {
klog.Errorf("Failed to get member cluster name for work %s/%s", obj.Namespace, obj.Name)
return false
}
clusterObj, err := util.GetCluster(mgr.GetClient(), clusterName)
if err != nil {
klog.Errorf("Failed to get the given member cluster %s", clusterName)
return false
}
return clusterObj.Spec.SyncMode == v1alpha1.Push
},
DeleteFunc: func(deleteEvent event.DeleteEvent) bool {
obj := deleteEvent.Object.(*workv1alpha1.Work)
clusterName, err := names.GetClusterName(obj.Namespace)
if err != nil {
klog.Errorf("Failed to get member cluster name for work %s/%s", obj.Namespace, obj.Name)
return false
}
clusterObj, err := util.GetCluster(mgr.GetClient(), clusterName)
if err != nil {
klog.Errorf("Failed to get the given member cluster %s", clusterName)
return false
}
return clusterObj.Spec.SyncMode == v1alpha1.Push
},
GenericFunc: func(genericEvent event.GenericEvent) bool {
return false
},
}
}