422 lines
16 KiB
Go
422 lines
16 KiB
Go
/*
|
|
Copyright 2023 The Karmada Authors.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package multiclusterservice
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"reflect"
|
|
"sync"
|
|
|
|
discoveryv1 "k8s.io/api/discovery/v1"
|
|
apierrors "k8s.io/apimachinery/pkg/api/errors"
|
|
"k8s.io/apimachinery/pkg/api/meta"
|
|
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
|
|
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
|
|
"k8s.io/apimachinery/pkg/labels"
|
|
"k8s.io/apimachinery/pkg/runtime"
|
|
"k8s.io/apimachinery/pkg/runtime/schema"
|
|
"k8s.io/apimachinery/pkg/types"
|
|
"k8s.io/client-go/tools/cache"
|
|
"k8s.io/klog/v2"
|
|
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/predicate"
|
|
|
|
clusterv1alpha1 "github.com/karmada-io/karmada/pkg/apis/cluster/v1alpha1"
|
|
networkingv1alpha1 "github.com/karmada-io/karmada/pkg/apis/networking/v1alpha1"
|
|
workv1alpha1 "github.com/karmada-io/karmada/pkg/apis/work/v1alpha1"
|
|
"github.com/karmada-io/karmada/pkg/util"
|
|
"github.com/karmada-io/karmada/pkg/util/fedinformer"
|
|
"github.com/karmada-io/karmada/pkg/util/fedinformer/genericmanager"
|
|
"github.com/karmada-io/karmada/pkg/util/fedinformer/keys"
|
|
"github.com/karmada-io/karmada/pkg/util/helper"
|
|
"github.com/karmada-io/karmada/pkg/util/names"
|
|
)
|
|
|
|
// EndpointSliceCollectControllerName is the controller name that will be used when reporting events.
|
|
const EndpointSliceCollectControllerName = "endpointslice-collect-controller"
|
|
|
|
// EndpointSliceCollectController collects EndpointSlice from member clusters and reports them to control-plane.
|
|
type EndpointSliceCollectController struct {
|
|
client.Client
|
|
RESTMapper meta.RESTMapper
|
|
StopChan <-chan struct{}
|
|
InformerManager genericmanager.MultiClusterInformerManager
|
|
WorkerNumber int // WorkerNumber is the number of worker goroutines
|
|
PredicateFunc predicate.Predicate // PredicateFunc is the function that filters events before enqueuing the keys.
|
|
ClusterDynamicClientSetFunc func(clusterName string, client client.Client) (*util.DynamicClusterClient, error)
|
|
// eventHandlers holds the handlers which used to handle events reported from member clusters.
|
|
// Each handler takes the cluster name as key and takes the handler function as the value, e.g.
|
|
// "member1": instance of ResourceEventHandler
|
|
eventHandlers sync.Map
|
|
worker util.AsyncWorker // worker process resources periodic from rateLimitingQueue.
|
|
|
|
ClusterCacheSyncTimeout metav1.Duration
|
|
}
|
|
|
|
var (
|
|
endpointSliceGVR = discoveryv1.SchemeGroupVersion.WithResource("endpointslices")
|
|
multiClusterServiceGVK = networkingv1alpha1.SchemeGroupVersion.WithKind("MultiClusterService")
|
|
)
|
|
|
|
// Reconcile performs a full reconciliation for the object referred to by the Request.
|
|
func (c *EndpointSliceCollectController) Reconcile(ctx context.Context, req controllerruntime.Request) (controllerruntime.Result, error) {
|
|
klog.V(4).Infof("Reconciling Work %s", req.NamespacedName.String())
|
|
|
|
work := &workv1alpha1.Work{}
|
|
if err := c.Client.Get(ctx, req.NamespacedName, work); err != nil {
|
|
if apierrors.IsNotFound(err) {
|
|
return controllerruntime.Result{}, nil
|
|
}
|
|
return controllerruntime.Result{Requeue: true}, err
|
|
}
|
|
|
|
if !helper.IsWorkContains(work.Spec.Workload.Manifests, multiClusterServiceGVK) {
|
|
return controllerruntime.Result{}, nil
|
|
}
|
|
|
|
if !work.DeletionTimestamp.IsZero() {
|
|
// The Provider Clusters' EndpointSlice will be deleted by mcs_controller, let's just ignore it
|
|
return controllerruntime.Result{}, nil
|
|
}
|
|
|
|
clusterName, err := names.GetClusterName(work.Namespace)
|
|
if err != nil {
|
|
klog.Errorf("Failed to get cluster name for work %s/%s", work.Namespace, work.Name)
|
|
return controllerruntime.Result{Requeue: true}, err
|
|
}
|
|
|
|
if err = c.buildResourceInformers(clusterName); err != nil {
|
|
return controllerruntime.Result{Requeue: true}, err
|
|
}
|
|
|
|
if err = c.collectTargetEndpointSlice(work, clusterName); err != nil {
|
|
return controllerruntime.Result{Requeue: true}, err
|
|
}
|
|
|
|
return controllerruntime.Result{}, nil
|
|
}
|
|
|
|
// SetupWithManager creates a controller and register to controller manager.
|
|
func (c *EndpointSliceCollectController) SetupWithManager(mgr controllerruntime.Manager) error {
|
|
return controllerruntime.NewControllerManagedBy(mgr).
|
|
For(&workv1alpha1.Work{}, builder.WithPredicates(c.PredicateFunc)).Complete(c)
|
|
}
|
|
|
|
// RunWorkQueue initializes worker and run it, worker will process resource asynchronously.
|
|
func (c *EndpointSliceCollectController) RunWorkQueue() {
|
|
workerOptions := util.Options{
|
|
Name: "endpointslice-collect",
|
|
KeyFunc: nil,
|
|
ReconcileFunc: c.collectEndpointSlice,
|
|
}
|
|
c.worker = util.NewAsyncWorker(workerOptions)
|
|
c.worker.Run(c.WorkerNumber, c.StopChan)
|
|
}
|
|
|
|
func (c *EndpointSliceCollectController) collectEndpointSlice(key util.QueueKey) error {
|
|
fedKey, ok := key.(keys.FederatedKey)
|
|
if !ok {
|
|
klog.Errorf("Failed to collect endpointslice as invalid key: %v", key)
|
|
return fmt.Errorf("invalid key")
|
|
}
|
|
|
|
klog.V(4).Infof("Begin to collect %s %s.", fedKey.Kind, fedKey.NamespaceKey())
|
|
if err := c.handleEndpointSliceEvent(fedKey); err != nil {
|
|
klog.Errorf("Failed to handle endpointSlice(%s) event, Error: %v",
|
|
fedKey.NamespaceKey(), err)
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (c *EndpointSliceCollectController) buildResourceInformers(clusterName string) error {
|
|
cluster, err := util.GetCluster(c.Client, clusterName)
|
|
if err != nil {
|
|
klog.Errorf("Failed to get the given member cluster %s", clusterName)
|
|
return err
|
|
}
|
|
|
|
if !util.IsClusterReady(&cluster.Status) {
|
|
klog.Errorf("Stop collect endpointslice for cluster(%s) as cluster not ready.", cluster.Name)
|
|
return fmt.Errorf("cluster(%s) not ready", cluster.Name)
|
|
}
|
|
|
|
if err := c.registerInformersAndStart(cluster); err != nil {
|
|
klog.Errorf("Failed to register informer for Cluster %s. Error: %v.", cluster.Name, err)
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// registerInformersAndStart builds informer manager for cluster if it doesn't exist, then constructs informers for gvr
|
|
// and start it.
|
|
func (c *EndpointSliceCollectController) registerInformersAndStart(cluster *clusterv1alpha1.Cluster) error {
|
|
singleClusterInformerManager := c.InformerManager.GetSingleClusterManager(cluster.Name)
|
|
if singleClusterInformerManager == nil {
|
|
dynamicClusterClient, err := c.ClusterDynamicClientSetFunc(cluster.Name, c.Client)
|
|
if err != nil {
|
|
klog.Errorf("Failed to build dynamic cluster client for cluster %s.", cluster.Name)
|
|
return err
|
|
}
|
|
singleClusterInformerManager = c.InformerManager.ForCluster(dynamicClusterClient.ClusterName, dynamicClusterClient.DynamicClientSet, 0)
|
|
}
|
|
|
|
gvrTargets := []schema.GroupVersionResource{
|
|
endpointSliceGVR,
|
|
}
|
|
|
|
allSynced := true
|
|
for _, gvr := range gvrTargets {
|
|
if !singleClusterInformerManager.IsInformerSynced(gvr) || !singleClusterInformerManager.IsHandlerExist(gvr, c.getEventHandler(cluster.Name)) {
|
|
allSynced = false
|
|
singleClusterInformerManager.ForResource(gvr, c.getEventHandler(cluster.Name))
|
|
}
|
|
}
|
|
if allSynced {
|
|
return nil
|
|
}
|
|
|
|
c.InformerManager.Start(cluster.Name)
|
|
|
|
if err := func() error {
|
|
synced := c.InformerManager.WaitForCacheSyncWithTimeout(cluster.Name, c.ClusterCacheSyncTimeout.Duration)
|
|
if synced == nil {
|
|
return fmt.Errorf("no informerFactory for cluster %s exist", cluster.Name)
|
|
}
|
|
for _, gvr := range gvrTargets {
|
|
if !synced[gvr] {
|
|
return fmt.Errorf("informer for %s hasn't synced", gvr)
|
|
}
|
|
}
|
|
return nil
|
|
}(); err != nil {
|
|
klog.Errorf("Failed to sync cache for cluster: %s, error: %v", cluster.Name, err)
|
|
c.InformerManager.Stop(cluster.Name)
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// getEventHandler return callback function that knows how to handle events from the member cluster.
|
|
func (c *EndpointSliceCollectController) getEventHandler(clusterName string) cache.ResourceEventHandler {
|
|
if value, exists := c.eventHandlers.Load(clusterName); exists {
|
|
return value.(cache.ResourceEventHandler)
|
|
}
|
|
|
|
eventHandler := fedinformer.NewHandlerOnEvents(c.genHandlerAddFunc(clusterName), c.genHandlerUpdateFunc(clusterName),
|
|
c.genHandlerDeleteFunc(clusterName))
|
|
c.eventHandlers.Store(clusterName, eventHandler)
|
|
return eventHandler
|
|
}
|
|
|
|
func (c *EndpointSliceCollectController) genHandlerAddFunc(clusterName string) func(obj interface{}) {
|
|
return func(obj interface{}) {
|
|
curObj := obj.(runtime.Object)
|
|
key, err := keys.FederatedKeyFunc(clusterName, curObj)
|
|
if err != nil {
|
|
klog.Warningf("Failed to generate key for obj: %s", curObj.GetObjectKind().GroupVersionKind())
|
|
return
|
|
}
|
|
c.worker.Add(key)
|
|
}
|
|
}
|
|
|
|
func (c *EndpointSliceCollectController) genHandlerUpdateFunc(clusterName string) func(oldObj, newObj interface{}) {
|
|
return func(oldObj, newObj interface{}) {
|
|
curObj := newObj.(runtime.Object)
|
|
if !reflect.DeepEqual(oldObj, newObj) {
|
|
key, err := keys.FederatedKeyFunc(clusterName, curObj)
|
|
if err != nil {
|
|
klog.Warningf("Failed to generate key for obj: %s", curObj.GetObjectKind().GroupVersionKind())
|
|
return
|
|
}
|
|
c.worker.Add(key)
|
|
}
|
|
}
|
|
}
|
|
|
|
func (c *EndpointSliceCollectController) genHandlerDeleteFunc(clusterName string) func(obj interface{}) {
|
|
return func(obj interface{}) {
|
|
if deleted, ok := obj.(cache.DeletedFinalStateUnknown); ok {
|
|
// This object might be stale but ok for our current usage.
|
|
obj = deleted.Obj
|
|
if obj == nil {
|
|
return
|
|
}
|
|
}
|
|
oldObj := obj.(runtime.Object)
|
|
key, err := keys.FederatedKeyFunc(clusterName, oldObj)
|
|
if err != nil {
|
|
klog.Warningf("Failed to generate key for obj: %s", oldObj.GetObjectKind().GroupVersionKind())
|
|
return
|
|
}
|
|
c.worker.Add(key)
|
|
}
|
|
}
|
|
|
|
// handleEndpointSliceEvent syncs EndPointSlice objects to control-plane according to EndpointSlice event.
|
|
// For EndpointSlice create or update event, reports the EndpointSlice when referencing service has been exported.
|
|
// For EndpointSlice delete event, cleanup the previously reported EndpointSlice.
|
|
func (c *EndpointSliceCollectController) handleEndpointSliceEvent(endpointSliceKey keys.FederatedKey) error {
|
|
endpointSliceObj, err := helper.GetObjectFromCache(c.RESTMapper, c.InformerManager, endpointSliceKey)
|
|
if err != nil {
|
|
if apierrors.IsNotFound(err) {
|
|
return cleanupWorkWithEndpointSliceDelete(c.Client, endpointSliceKey)
|
|
}
|
|
return err
|
|
}
|
|
|
|
if util.GetLabelValue(endpointSliceObj.GetLabels(), discoveryv1.LabelManagedBy) == util.EndpointSliceDispatchControllerLabelValue {
|
|
return nil
|
|
}
|
|
|
|
workList := &workv1alpha1.WorkList{}
|
|
if err := c.Client.List(context.TODO(), workList, &client.ListOptions{
|
|
Namespace: names.GenerateExecutionSpaceName(endpointSliceKey.Cluster),
|
|
LabelSelector: labels.SelectorFromSet(labels.Set{
|
|
util.MultiClusterServiceNamespaceLabel: endpointSliceKey.Namespace,
|
|
util.MultiClusterServiceNameLabel: util.GetLabelValue(endpointSliceObj.GetLabels(), discoveryv1.LabelServiceName),
|
|
})}); err != nil {
|
|
klog.Errorf("Failed to list workList reported by endpointSlice(%s/%s), error: %v", endpointSliceKey.Namespace, endpointSliceKey.Name, err)
|
|
return err
|
|
}
|
|
|
|
mcsExists := false
|
|
for _, work := range workList.Items {
|
|
if helper.IsWorkContains(work.Spec.Workload.Manifests, multiClusterServiceGVK) {
|
|
mcsExists = true
|
|
break
|
|
}
|
|
}
|
|
if !mcsExists {
|
|
return nil
|
|
}
|
|
|
|
if err = c.reportEndpointSliceWithEndpointSliceCreateOrUpdate(endpointSliceKey.Cluster, endpointSliceObj); err != nil {
|
|
klog.Errorf("Failed to handle endpointSlice(%s) event, Error: %v",
|
|
endpointSliceKey.NamespaceKey(), err)
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (c *EndpointSliceCollectController) collectTargetEndpointSlice(work *workv1alpha1.Work, clusterName string) error {
|
|
manager := c.InformerManager.GetSingleClusterManager(clusterName)
|
|
if manager == nil {
|
|
err := fmt.Errorf("failed to get informer manager for cluster %s", clusterName)
|
|
klog.Errorf("%v", err)
|
|
return err
|
|
}
|
|
|
|
svcNamespace := util.GetLabelValue(work.Labels, util.MultiClusterServiceNamespaceLabel)
|
|
svcName := util.GetLabelValue(work.Labels, util.MultiClusterServiceNameLabel)
|
|
selector := labels.SelectorFromSet(labels.Set{
|
|
discoveryv1.LabelServiceName: svcName,
|
|
})
|
|
epsList, err := manager.Lister(discoveryv1.SchemeGroupVersion.WithResource("endpointslices")).ByNamespace(svcNamespace).List(selector)
|
|
if err != nil {
|
|
klog.Errorf("Failed to list EndpointSlice for Service(%s/%s) in cluster(%s), Error: %v", svcNamespace, svcName, clusterName, err)
|
|
return err
|
|
}
|
|
for _, epsObj := range epsList {
|
|
eps := &discoveryv1.EndpointSlice{}
|
|
if err = helper.ConvertToTypedObject(epsObj, eps); err != nil {
|
|
klog.Errorf("Failed to convert object to EndpointSlice, error: %v", err)
|
|
return err
|
|
}
|
|
if util.GetLabelValue(eps.GetLabels(), discoveryv1.LabelManagedBy) == util.EndpointSliceDispatchControllerLabelValue {
|
|
continue
|
|
}
|
|
epsUnstructured, err := helper.ToUnstructured(eps)
|
|
if err != nil {
|
|
klog.Errorf("Failed to convert EndpointSlice %s/%s to unstructured, error: %v", eps.GetNamespace(), eps.GetName(), err)
|
|
return err
|
|
}
|
|
if err := c.reportEndpointSliceWithEndpointSliceCreateOrUpdate(clusterName, epsUnstructured); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// reportEndpointSliceWithEndpointSliceCreateOrUpdate reports the EndpointSlice when referencing service has been exported.
|
|
func (c *EndpointSliceCollectController) reportEndpointSliceWithEndpointSliceCreateOrUpdate(clusterName string, endpointSlice *unstructured.Unstructured) error {
|
|
if err := reportEndpointSlice(c.Client, endpointSlice, clusterName); err != nil {
|
|
return fmt.Errorf("failed to report EndpointSlice(%s/%s) from cluster(%s) to control-plane",
|
|
endpointSlice.GetNamespace(), endpointSlice.GetName(), clusterName)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// reportEndpointSlice report EndPointSlice objects to control-plane.
|
|
func reportEndpointSlice(c client.Client, endpointSlice *unstructured.Unstructured, clusterName string) error {
|
|
executionSpace := names.GenerateExecutionSpaceName(clusterName)
|
|
|
|
workMeta := metav1.ObjectMeta{
|
|
// Karmada will synchronize this work to other cluster namespaces and add the cluster name to prevent conflicts.
|
|
Name: names.GenerateWorkName(endpointSlice.GetKind(), endpointSlice.GetName(), endpointSlice.GetNamespace()),
|
|
Namespace: executionSpace,
|
|
Labels: map[string]string{
|
|
util.MultiClusterServiceNamespaceLabel: endpointSlice.GetNamespace(),
|
|
util.MultiClusterServiceNameLabel: endpointSlice.GetLabels()[discoveryv1.LabelServiceName],
|
|
// indicate the Work should be not propagated since it's collected resource.
|
|
util.PropagationInstruction: util.PropagationInstructionSuppressed,
|
|
util.ManagedByKarmadaLabel: util.ManagedByKarmadaLabelValue,
|
|
},
|
|
}
|
|
|
|
if err := helper.CreateOrUpdateWork(c, workMeta, endpointSlice); err != nil {
|
|
klog.Errorf("Failed to create or update work(%s/%s), Error: %v", workMeta.Namespace, workMeta.Name, err)
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func cleanupWorkWithEndpointSliceDelete(c client.Client, endpointSliceKey keys.FederatedKey) error {
|
|
executionSpace := names.GenerateExecutionSpaceName(endpointSliceKey.Cluster)
|
|
|
|
workNamespaceKey := types.NamespacedName{
|
|
Namespace: executionSpace,
|
|
Name: names.GenerateWorkName(endpointSliceKey.Kind, endpointSliceKey.Name, endpointSliceKey.Namespace),
|
|
}
|
|
work := &workv1alpha1.Work{}
|
|
if err := c.Get(context.TODO(), workNamespaceKey, work); err != nil {
|
|
if apierrors.IsNotFound(err) {
|
|
return nil
|
|
}
|
|
klog.Errorf("Failed to get work(%s) in executionSpace(%s): %v", workNamespaceKey.String(), executionSpace, err)
|
|
return err
|
|
}
|
|
|
|
if err := c.Delete(context.TODO(), work); err != nil {
|
|
klog.Errorf("Failed to delete work(%s): %v", workNamespaceKey.String(), err)
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|