/
eventhandlers.go
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/
eventhandlers.go
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package multiclusterservice
import (
"context"
"strings"
networkingv1alpha1 "github.com/karmada-io/karmada/pkg/apis/networking/v1alpha1"
corev1 "k8s.io/api/core/v1"
discoveryv1 "k8s.io/api/discovery/v1"
"k8s.io/apimachinery/pkg/api/equality"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/types"
"k8s.io/client-go/util/workqueue"
"k8s.io/klog/v2"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/event"
"sigs.k8s.io/controller-runtime/pkg/handler"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
"github.com/karmada-io/multicluster-cloud-provider/pkg/util"
)
func newMultiClusterServiceEventHandler() handler.EventHandler {
return &multiClusterServiceEventHandler{}
}
var _ handler.EventHandler = (*multiClusterServiceEventHandler)(nil)
type multiClusterServiceEventHandler struct {
}
func (h *multiClusterServiceEventHandler) Create(ctx context.Context, e event.CreateEvent, queue workqueue.RateLimitingInterface) {
mcs := e.Object.(*networkingv1alpha1.MultiClusterService)
if !util.MCSContainLoadBalanceType(mcs) {
return
}
queue.Add(reconcile.Request{NamespacedName: types.NamespacedName{
Namespace: mcs.Namespace,
Name: mcs.Name,
}})
}
func (h *multiClusterServiceEventHandler) Update(ctx context.Context, e event.UpdateEvent, queue workqueue.RateLimitingInterface) {
mcsOld := e.ObjectOld.(*networkingv1alpha1.MultiClusterService)
mcsNew := e.ObjectNew.(*networkingv1alpha1.MultiClusterService)
if !util.MCSContainLoadBalanceType(mcsOld) && !util.MCSContainLoadBalanceType(mcsNew) {
return
}
// We only care about the update events below:
if equality.Semantic.DeepEqual(mcsOld.Annotations, mcsNew.Annotations) &&
equality.Semantic.DeepEqual(mcsOld.Spec, mcsNew.Spec) &&
equality.Semantic.DeepEqual(mcsOld.DeletionTimestamp.IsZero(), mcsNew.DeletionTimestamp.IsZero()) {
return
}
queue.Add(reconcile.Request{NamespacedName: types.NamespacedName{
Namespace: mcsNew.GetNamespace(),
Name: mcsNew.GetName(),
}})
}
func (h *multiClusterServiceEventHandler) Delete(ctx context.Context, _ event.DeleteEvent, _ workqueue.RateLimitingInterface) {
// Since finalizer is added to the MultiClusterService object,
// the delete event is processed by the update event.
}
func (h *multiClusterServiceEventHandler) Generic(ctx context.Context, e event.GenericEvent, queue workqueue.RateLimitingInterface) {
queue.Add(reconcile.Request{NamespacedName: types.NamespacedName{
Namespace: e.Object.GetNamespace(),
Name: e.Object.GetName(),
}})
}
func newServiceEventHandler(mcsEventChan chan<- event.GenericEvent, client client.Client) handler.EventHandler {
return &serviceEventHandler{
mcsEventChan: mcsEventChan,
client: client,
}
}
var _ handler.EventHandler = (*serviceEventHandler)(nil)
type serviceEventHandler struct {
mcsEventChan chan<- event.GenericEvent
client client.Client
}
func (h *serviceEventHandler) Create(ctx context.Context, e event.CreateEvent, _ workqueue.RateLimitingInterface) {
h.enqueueImpactedMCS(e.Object.GetNamespace(), e.Object.GetName())
}
func (h *serviceEventHandler) Update(ctx context.Context, e event.UpdateEvent, _ workqueue.RateLimitingInterface) {
svcOld := e.ObjectOld.(*corev1.Service)
svcNew := e.ObjectNew.(*corev1.Service)
// We only care about the update events below:
if equality.Semantic.DeepEqual(svcOld.Annotations, svcNew.Annotations) &&
equality.Semantic.DeepEqual(svcOld.Spec, svcNew.Spec) {
return
}
h.enqueueImpactedMCS(svcNew.Namespace, svcNew.Name)
}
func (h *serviceEventHandler) Delete(ctx context.Context, e event.DeleteEvent, _ workqueue.RateLimitingInterface) {
h.enqueueImpactedMCS(e.Object.GetNamespace(), e.Object.GetName())
}
func (h *serviceEventHandler) Generic(ctx context.Context, e event.GenericEvent, _ workqueue.RateLimitingInterface) {
h.enqueueImpactedMCS(e.Object.GetNamespace(), e.Object.GetName())
}
func (h *serviceEventHandler) enqueueImpactedMCS(svcNamespace, svcName string) {
h.mcsEventChan <- event.GenericEvent{
Object: &networkingv1alpha1.MultiClusterService{
ObjectMeta: metav1.ObjectMeta{
Namespace: svcNamespace,
Name: svcName,
}}}
}
// endpointSlicePrefix is the prefix of service derived from ServiceImport.
const derivedServicePrefix = "derived-"
func newEndpointSlicesEventHandler(svcEventChan chan<- event.GenericEvent) handler.EventHandler {
return &endpointSlicesEventHandler{
svcEventChan: svcEventChan,
}
}
var _ handler.EventHandler = (*endpointSlicesEventHandler)(nil)
type endpointSlicesEventHandler struct {
svcEventChan chan<- event.GenericEvent
}
func (h *endpointSlicesEventHandler) Create(ctx context.Context, e event.CreateEvent, _ workqueue.RateLimitingInterface) {
h.enqueueImpactedSvc(e.Object)
}
func (h *endpointSlicesEventHandler) Update(ctx context.Context, e event.UpdateEvent, _ workqueue.RateLimitingInterface) {
h.enqueueImpactedSvc(e.ObjectNew)
}
func (h *endpointSlicesEventHandler) Delete(ctx context.Context, e event.DeleteEvent, _ workqueue.RateLimitingInterface) {
h.enqueueImpactedSvc(e.Object)
}
func (h *endpointSlicesEventHandler) Generic(ctx context.Context, _ event.GenericEvent, _ workqueue.RateLimitingInterface) {
}
func (h *endpointSlicesEventHandler) enqueueImpactedSvc(obj client.Object) {
svcName, ok := obj.GetLabels()[discoveryv1.LabelServiceName]
if !ok {
klog.Warning("Can not get the key(%s) with the endpointSlices object(%s/%s)",
discoveryv1.LabelServiceName, obj.GetNamespace(), obj.GetName())
return
}
h.svcEventChan <- event.GenericEvent{
Object: &corev1.Service{
ObjectMeta: metav1.ObjectMeta{
Namespace: obj.GetNamespace(),
Name: strings.TrimPrefix(svcName, derivedServicePrefix),
}}}
}