feat: sync core-dns svc

Signed-off-by: baoyinghai_yewu <baoyinghai_yewu@cmss.chinamobile.com>

cmd/kubenest/operator/app/operator.go

@@ -11,11 +11,13 @@ import (
 	cliflag "k8s.io/component-base/cli/flag"
 	"k8s.io/klog/v2"
 	controllerruntime "sigs.k8s.io/controller-runtime"
+	"sigs.k8s.io/controller-runtime/pkg/manager"
 
 	"github.com/kosmos.io/kosmos/cmd/kubenest/operator/app/options"
 	"github.com/kosmos.io/kosmos/pkg/generated/clientset/versioned"
 	"github.com/kosmos.io/kosmos/pkg/kubenest/constants"
 	"github.com/kosmos.io/kosmos/pkg/kubenest/controller"
+	endpointscontroller "github.com/kosmos.io/kosmos/pkg/kubenest/controller/endpoints.sync.controller"
 	glnodecontroller "github.com/kosmos.io/kosmos/pkg/kubenest/controller/global.node.controller"
 	kosmos "github.com/kosmos.io/kosmos/pkg/kubenest/controller/kosmos"
 	vcnodecontroller "github.com/kosmos.io/kosmos/pkg/kubenest/controller/virtualcluster.node.controller"
@@ -54,6 +56,28 @@ func NewVirtualClusterOperatorCommand(ctx context.Context) *cobra.Command {
 	return cmd
 }
 
+func startEndPointsControllers(mgr manager.Manager) error {
+	coreEndPointsController := endpointscontroller.CoreDNSController{
+		Client:        mgr.GetClient(),
+		EventRecorder: mgr.GetEventRecorderFor(constants.GlobalNodeControllerName),
+	}
+
+	if err := coreEndPointsController.SetupWithManager(mgr); err != nil {
+		return fmt.Errorf("error starting %s: %v", endpointscontroller.CoreDNSSyncControllerName, err)
+	}
+
+	KonnectivityEndPointsController := endpointscontroller.KonnectivityController{
+		Client:        mgr.GetClient(),
+		EventRecorder: mgr.GetEventRecorderFor(constants.GlobalNodeControllerName),
+	}
+
+	if err := KonnectivityEndPointsController.SetupWithManager(mgr); err != nil {
+		return fmt.Errorf("error starting %s: %v", endpointscontroller.KonnectivitySyncControllerName, err)
+	}
+
+	return nil
+}
+
 func run(ctx context.Context, opts *options.Options) error {
 	config, err := clientcmd.BuildConfigFromFlags(opts.KubernetesOptions.Master, opts.KubernetesOptions.KubeConfig)
 	if err != nil {
@@ -111,6 +135,10 @@ func run(ctx context.Context, opts *options.Options) error {
 		return fmt.Errorf("error starting %s: %v", constants.GlobalNodeControllerName, err)
 	}
 
+	if err := startEndPointsControllers(mgr); err != nil {
+		return err
+	}
+
 	VirtualClusterNodeController := vcnodecontroller.NodeController{
 		Client:        mgr.GetClient(),
 		RootClientSet: hostKubeClient,

pkg/kubenest/constants/constant.go

@@ -109,6 +109,8 @@ const (
 	PrometheusRuleManifest   = "prometheus-rules"
 
 	StateLabelKey = "kosmos-io/state"
+
+	KonnectivityServerSuffix = "konnectivity-server"
 )
 
 type Action string

pkg/kubenest/controller/endpoints.sync.controller/coredns_sync_controller.go

@@ -0,0 +1,198 @@
+package endpointcontroller
+
+import (
+	"context"
+	"fmt"
+
+	v1 "k8s.io/api/core/v1"
+	apierrors "k8s.io/apimachinery/pkg/api/errors"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/util/intstr"
+	"k8s.io/client-go/kubernetes"
+	"k8s.io/client-go/tools/record"
+	"k8s.io/client-go/util/retry"
+	"k8s.io/klog"
+	controllerruntime "sigs.k8s.io/controller-runtime"
+	"sigs.k8s.io/controller-runtime/pkg/builder"
+	"sigs.k8s.io/controller-runtime/pkg/client"
+	"sigs.k8s.io/controller-runtime/pkg/controller"
+	"sigs.k8s.io/controller-runtime/pkg/event"
+	"sigs.k8s.io/controller-runtime/pkg/manager"
+	"sigs.k8s.io/controller-runtime/pkg/predicate"
+	"sigs.k8s.io/controller-runtime/pkg/reconcile"
+
+	"github.com/kosmos.io/kosmos/pkg/apis/kosmos/v1alpha1"
+	"github.com/kosmos.io/kosmos/pkg/kubenest/constants"
+	"github.com/kosmos.io/kosmos/pkg/kubenest/util"
+	"github.com/kosmos.io/kosmos/pkg/utils"
+)
+
+type CoreDNSController struct {
+	client.Client
+	EventRecorder record.EventRecorder
+}
+
+const CoreDNSSyncControllerName = "virtual-cluster-coredns-sync-controller"
+
+func (e *CoreDNSController) SetupWithManager(mgr manager.Manager) error {
+	skipEvent := func(obj client.Object) bool {
+		// Only handle the "kube-dns" service with namespacing
+		return obj.GetName() == constants.KubeDNSSVCName && obj.GetNamespace() != ""
+	}
+
+	return controllerruntime.NewControllerManagedBy(mgr).
+		Named(CoreDNSSyncControllerName).
+		WithOptions(controller.Options{MaxConcurrentReconciles: 5}).
+		For(&v1.Service{},
+			builder.WithPredicates(predicate.Funcs{
+				CreateFunc: func(createEvent event.CreateEvent) bool {
+					return skipEvent(createEvent.Object)
+				},
+				UpdateFunc: func(updateEvent event.UpdateEvent) bool { return skipEvent(updateEvent.ObjectNew) },
+				DeleteFunc: func(deleteEvent event.DeleteEvent) bool { return false },
+			})).
+		Complete(e)
+}
+
+func (e *CoreDNSController) SyncVirtualClusterSVC(ctx context.Context, k8sClient kubernetes.Interface, DNSPort int32, DNSTCPPort int32, MetricsPort int32) error {
+	virtualClusterSVC, err := k8sClient.CoreV1().Services(constants.SystemNs).Get(ctx, constants.KubeDNSSVCName, metav1.GetOptions{})
+	if err != nil {
+		return fmt.Errorf("get virtualcluster svc %s failed: %v", constants.KubeDNSSVCName, err)
+	}
+
+	if virtualClusterSVC.Spec.Ports == nil {
+		return fmt.Errorf("svc %s ports is nil", constants.KubeDNSSVCName)
+	}
+
+	updateSVC := virtualClusterSVC.DeepCopy()
+
+	for i, port := range virtualClusterSVC.Spec.Ports {
+		if port.Name == "dns" {
+			updateSVC.Spec.Ports[i].TargetPort = intstr.IntOrString{Type: intstr.Int, IntVal: DNSPort}
+		}
+		if port.Name == "dns-tcp" {
+			updateSVC.Spec.Ports[i].TargetPort = intstr.IntOrString{Type: intstr.Int, IntVal: DNSTCPPort}
+		}
+		if port.Name == "metrics" {
+			updateSVC.Spec.Ports[i].TargetPort = intstr.IntOrString{Type: intstr.Int, IntVal: MetricsPort}
+		}
+	}
+
+	if _, err := k8sClient.CoreV1().Services(constants.SystemNs).Update(ctx, updateSVC, metav1.UpdateOptions{}); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (e *CoreDNSController) SyncVirtualClusterEPS(ctx context.Context, k8sClient kubernetes.Interface, DNSPort int32, DNSTCPPort int32, MetricsPort int32) error {
+	virtualEndPoints, err := k8sClient.CoreV1().Endpoints(constants.SystemNs).Get(ctx, constants.KubeDNSSVCName, metav1.GetOptions{})
+	if err != nil {
+		return fmt.Errorf("get virtualcluster eps %s failed: %v", constants.KubeDNSSVCName, err)
+	}
+
+	if len(virtualEndPoints.Subsets) != 1 {
+		return fmt.Errorf("eps %s Subsets length is not 1", constants.KubeDNSSVCName)
+	}
+
+	if virtualEndPoints.Subsets[0].Ports == nil {
+		return fmt.Errorf("eps %s ports length is nil", constants.KubeDNSSVCName)
+	}
+
+	updateEPS := virtualEndPoints.DeepCopy()
+
+	for i, port := range virtualEndPoints.Subsets[0].Ports {
+		if port.Name == "dns" {
+			updateEPS.Subsets[0].Ports[i].Port = DNSPort
+		}
+		if port.Name == "dns-tcp" {
+			updateEPS.Subsets[0].Ports[i].Port = DNSTCPPort
+		}
+		if port.Name == "metrics" {
+			updateEPS.Subsets[0].Ports[i].Port = MetricsPort
+		}
+	}
+
+	if _, err := k8sClient.CoreV1().Endpoints(constants.SystemNs).Update(ctx, updateEPS, metav1.UpdateOptions{}); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (e *CoreDNSController) Reconcile(ctx context.Context, request reconcile.Request) (reconcile.Result, error) {
+	klog.V(4).Infof("============ %s start to reconcile %s ============", CoreDNSSyncControllerName, request.NamespacedName)
+	defer klog.V(4).Infof("============ %s finish to reconcile %s ============", CoreDNSSyncControllerName, request.NamespacedName)
+
+	// Find the corresponding virtualcluster based on the namespace of SVC
+	var virtualClusterList v1alpha1.VirtualClusterList
+	if err := e.List(ctx, &virtualClusterList); err != nil {
+		if apierrors.IsNotFound(err) {
+			return reconcile.Result{}, nil
+		}
+		klog.V(4).Infof("query virtualcluster failed: %v", err)
+		return reconcile.Result{RequeueAfter: utils.DefaultRequeueTime}, nil
+	}
+	var targetVirtualCluster v1alpha1.VirtualCluster
+	hasVirtualCluster := false
+	for _, vc := range virtualClusterList.Items {
+		if vc.Namespace == request.Namespace {
+			targetVirtualCluster = vc
+			hasVirtualCluster = true
+			break
+		}
+	}
+	if !hasVirtualCluster {
+		klog.V(4).Infof("virtualcluster %s not found", request.Namespace)
+		return reconcile.Result{}, nil
+	}
+
+	if targetVirtualCluster.Status.Phase != v1alpha1.AllNodeReady && targetVirtualCluster.Status.Phase != v1alpha1.Completed {
+		return reconcile.Result{RequeueAfter: utils.DefaultRequeueTime}, nil
+	}
+
+	// Get the corresponding svc
+	var kubesvc v1.Service
+	if err := e.Get(ctx, request.NamespacedName, &kubesvc); err != nil {
+		klog.V(4).Infof("get kubesvc %s failed: %v", request.NamespacedName, err)
+		return reconcile.Result{RequeueAfter: utils.DefaultRequeueTime}, nil
+	}
+	dnsPort := int32(0)
+	dnsTCPPort := int32(0)
+	metricsPort := int32(0)
+
+	for _, port := range kubesvc.Spec.Ports {
+		if port.Name == "dns" {
+			dnsPort = port.NodePort
+		}
+		if port.Name == "dns-tcp" {
+			dnsTCPPort = port.NodePort
+		}
+		if port.Name == "metrics" {
+			metricsPort = port.NodePort
+		}
+	}
+
+	k8sClient, err := util.GenerateKubeclient(&targetVirtualCluster)
+	if err != nil {
+		klog.Errorf("virtualcluster %s crd kubernetes client failed: %v", targetVirtualCluster.Name, err)
+		return reconcile.Result{}, nil
+	}
+
+	// do sync
+	if err := retry.RetryOnConflict(retry.DefaultRetry, func() error {
+		return e.SyncVirtualClusterEPS(ctx, k8sClient, dnsPort, dnsTCPPort, metricsPort)
+	}); err != nil {
+		klog.Errorf("virtualcluster %s sync virtualcluster endpoints failed: %v", targetVirtualCluster.Name, err)
+		return reconcile.Result{RequeueAfter: utils.DefaultRequeueTime}, nil
+	}
+
+	if err := retry.RetryOnConflict(retry.DefaultRetry, func() error {
+		return e.SyncVirtualClusterSVC(ctx, k8sClient, dnsPort, dnsTCPPort, metricsPort)
+	}); err != nil {
+		klog.Errorf("virtualcluster %s sync virtualcluster svc failed: %v", targetVirtualCluster.Name, err)
+		return reconcile.Result{RequeueAfter: utils.DefaultRequeueTime}, nil
+	}
+
+	return reconcile.Result{}, nil
+}

pkg/kubenest/controller/endpoints.sync.controller/konnectivity_sync_controller.go

@@ -0,0 +1,137 @@
+package endpointcontroller
+
+import (
+	"context"
+	"fmt"
+	"strings"
+
+	v1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/types"
+	"k8s.io/client-go/kubernetes"
+	"k8s.io/client-go/tools/record"
+	"k8s.io/client-go/util/retry"
+	"k8s.io/klog"
+	controllerruntime "sigs.k8s.io/controller-runtime"
+	"sigs.k8s.io/controller-runtime/pkg/builder"
+	"sigs.k8s.io/controller-runtime/pkg/client"
+	"sigs.k8s.io/controller-runtime/pkg/controller"
+	"sigs.k8s.io/controller-runtime/pkg/event"
+	"sigs.k8s.io/controller-runtime/pkg/manager"
+	"sigs.k8s.io/controller-runtime/pkg/predicate"
+	"sigs.k8s.io/controller-runtime/pkg/reconcile"
+
+	"github.com/kosmos.io/kosmos/pkg/apis/kosmos/v1alpha1"
+	"github.com/kosmos.io/kosmos/pkg/kubenest/constants"
+	"github.com/kosmos.io/kosmos/pkg/kubenest/util"
+	"github.com/kosmos.io/kosmos/pkg/utils"
+)
+
+type KonnectivityController struct {
+	client.Client
+	EventRecorder record.EventRecorder
+}
+
+const KonnectivitySyncControllerName = "virtual-cluster-konnectivity-sync-controller"
+
+func (e *KonnectivityController) SetupWithManager(mgr manager.Manager) error {
+	skipEvent := func(obj client.Object) bool {
+		// Only handle the "konnectivity-server" endpoints
+		return strings.HasSuffix(obj.GetName(), constants.KonnectivityServerSuffix)
+	}
+
+	return controllerruntime.NewControllerManagedBy(mgr).
+		Named(KonnectivitySyncControllerName).
+		WithOptions(controller.Options{MaxConcurrentReconciles: 5}).
+		For(&v1.Endpoints{},
+			builder.WithPredicates(predicate.Funcs{
+				CreateFunc: func(createEvent event.CreateEvent) bool {
+					return skipEvent(createEvent.Object)
+				},
+				UpdateFunc: func(updateEvent event.UpdateEvent) bool { return skipEvent(updateEvent.ObjectNew) },
+				DeleteFunc: func(deleteEvent event.DeleteEvent) bool { return false },
+			})).
+		Complete(e)
+}
+
+func (e *KonnectivityController) SyncVirtualClusterEPS(ctx context.Context, k8sClient kubernetes.Interface, eps v1.Endpoints) error {
+	virtualEndPoints, err := k8sClient.CoreV1().Endpoints(constants.SystemNs).Get(ctx, constants.KonnectivityServerSuffix, metav1.GetOptions{})
+	if err != nil {
+		return fmt.Errorf("get virtualcluster eps %s failed: %v", constants.KonnectivityServerSuffix, err)
+	}
+
+	if len(virtualEndPoints.Subsets) == 0 {
+		return fmt.Errorf("virtualcluster eps %s has no subsets", constants.KonnectivityServerSuffix)
+	}
+
+	if len(virtualEndPoints.Subsets[0].Ports) == 0 {
+		return fmt.Errorf("virtualcluster eps %s has no ports", constants.KonnectivityServerSuffix)
+	}
+
+	// only sync the port of the konnectivity-server endpoints
+	targetPort := virtualEndPoints.Subsets[0].Ports[0].Port
+	updateEPS := virtualEndPoints.DeepCopy()
+
+	copyFromEPS := eps.DeepCopy()
+	updateEPS.Subsets = copyFromEPS.Subsets
+	for i := range updateEPS.Subsets {
+		if len(updateEPS.Subsets[i].Ports) == 0 {
+			continue
+		}
+		updateEPS.Subsets[i].Ports[0].Port = targetPort
+	}
+
+	if _, err := k8sClient.CoreV1().Endpoints(constants.SystemNs).Update(ctx, updateEPS, metav1.UpdateOptions{}); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (e *KonnectivityController) GetVirtualCluster(ctx context.Context, eps v1.Endpoints) (*v1alpha1.VirtualCluster, error) {
+	virtualClusterName := strings.TrimSuffix(eps.GetName(), "-"+constants.KonnectivityServerSuffix)
+	vartialClusterNamespace := eps.GetNamespace()
+	var vc v1alpha1.VirtualCluster
+	if err := e.Get(ctx, types.NamespacedName{Name: virtualClusterName, Namespace: vartialClusterNamespace}, &vc); err != nil {
+		return nil, err
+	}
+	return &vc, nil
+}
+
+func (e *KonnectivityController) Reconcile(ctx context.Context, request reconcile.Request) (reconcile.Result, error) {
+	klog.V(4).Infof("============ %s start to reconcile %s ============", KonnectivitySyncControllerName, request.NamespacedName)
+	defer klog.V(4).Infof("============ %s finish to reconcile %s ============", KonnectivitySyncControllerName, request.NamespacedName)
+
+	// Get the corresponding svc
+	var kubeEPS v1.Endpoints
+	if err := e.Get(ctx, request.NamespacedName, &kubeEPS); err != nil {
+		klog.V(4).Infof("get kubeEPS %s failed: %v", request.NamespacedName, err)
+		return reconcile.Result{RequeueAfter: utils.DefaultRequeueTime}, nil
+	}
+
+	targetVirtualCluster, err := e.GetVirtualCluster(ctx, kubeEPS)
+	if err != nil {
+		klog.V(4).Infof("query virtualcluster failed: %v", err)
+		return reconcile.Result{RequeueAfter: utils.DefaultRequeueTime}, nil
+	}
+
+	if targetVirtualCluster.Status.Phase != v1alpha1.AllNodeReady && targetVirtualCluster.Status.Phase != v1alpha1.Completed {
+		return reconcile.Result{RequeueAfter: utils.DefaultRequeueTime}, nil
+	}
+
+	k8sClient, err := util.GenerateKubeclient(targetVirtualCluster)
+	if err != nil {
+		klog.Errorf("virtualcluster %s crd kubernetes client failed: %v", targetVirtualCluster.Name, err)
+		return reconcile.Result{}, nil
+	}
+
+	// // do sync
+	if err := retry.RetryOnConflict(retry.DefaultRetry, func() error {
+		return e.SyncVirtualClusterEPS(ctx, k8sClient, kubeEPS)
+	}); err != nil {
+		klog.Errorf("virtualcluster %s sync virtualcluster svc failed: %v", targetVirtualCluster.Name, err)
+		return reconcile.Result{RequeueAfter: utils.DefaultRequeueTime}, nil
+	}
+
+	return reconcile.Result{}, nil
+}