add cluster name to the event when export

Signed-off-by: wanjunlei <wanjunlei@kubesphere.io>

go.sum

@@ -1355,7 +1355,6 @@ rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
 rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=
 sigs.k8s.io/controller-runtime v0.14.6 h1:oxstGVvXGNnMvY7TAESYk+lzr6S3V5VFxQ6d92KcwQA=
 sigs.k8s.io/controller-runtime v0.14.6/go.mod h1:WqIdsAY6JBsjfc/CqO0CORmNtoCtE4S6qbPc9s68h+0=
-sigs.k8s.io/json v0.0.0-20220713155537-f223a00ba0e2 h1:iXTIw73aPyC+oRdyqqvVJuloN1p0AC/kzH07hu3NE+k=
 sigs.k8s.io/json v0.0.0-20220713155537-f223a00ba0e2/go.mod h1:B8JuhiUyNFVKdsE8h686QcCxMaH6HrOAZj4vswFpcB0=
 sigs.k8s.io/json v0.0.0-20221116044647-bc3834ca7abd h1:EDPBXCAspyGV4jQlpZSudPeMmr1bNJefnuqLsRAsHZo=
 sigs.k8s.io/json v0.0.0-20221116044647-bc3834ca7abd/go.mod h1:B8JuhiUyNFVKdsE8h686QcCxMaH6HrOAZj4vswFpcB0=

pkg/exporter/kube_events_exporter.go

@@ -30,6 +30,7 @@ const (
 var maxBatchSize = 500
 
 type K8sEventSource struct {
+	client    *kubernetes.Clientset
 	workqueue workqueue.RateLimitingInterface
 	inf       cache.SharedIndexInformer
 	sinkers   []types.Sinker
@@ -48,9 +49,9 @@ func (s *K8sEventSource) ReloadConfig(c *config.ExporterConfig) {
 
 	for _, w := range c.Sinks.Webhooks {
 		if w.Url != "" {
-			sinkers = append(sinkers, &sinks.WebhookSinker{Url: w.Url})
+			sinkers = append(sinkers, &sinks.WebhookSinker{Url: w.Url, Cluster: s.getClusterName()})
 		} else if w.Service != nil {
-			sinkers = append(sinkers, &sinks.WebhookSinker{Url: fmt.Sprintf("http://%s.%s.svc:%d/%s",
+			sinkers = append(sinkers, &sinks.WebhookSinker{Cluster: s.getClusterName(), Url: fmt.Sprintf("http://%s.%s.svc:%d/%s",
 				w.Service.Name, w.Service.Namespace, *w.Service.Port, w.Service.Path)})
 		}
 	}
@@ -61,6 +62,20 @@ func (s *K8sEventSource) ReloadConfig(c *config.ExporterConfig) {
 	s.sinkers = sinkers
 }
 
+func (s *K8sEventSource) getClusterName() string {
+	ns, err := s.client.CoreV1().Namespaces().Get(context.Background(), "kubesphere-system", metav1.GetOptions{})
+	if err != nil {
+		klog.Error("get namespace kubesphere-system error: %s", err)
+		return ""
+	}
+
+	if ns.Annotations != nil {
+		return ns.Annotations["cluster.kubesphere.io/name"]
+	}
+
+	return ""
+}
+
 func (s *K8sEventSource) getSinkers() []types.Sinker {
 	s.mutex.Lock()
 	defer s.mutex.Unlock()
@@ -168,6 +183,7 @@ func (s *K8sEventSource) enqueueEvent(obj interface{}) {
 
 func NewKubeEventSource(client *kubernetes.Clientset) *K8sEventSource {
 	s := &K8sEventSource{
+		client:    client,
 		workqueue: workqueue.NewNamedRateLimitingQueue(workqueue.DefaultControllerRateLimiter(), "events"),
 	}
 	lw := cache.NewListWatchFromClient(client.CoreV1().RESTClient(),

pkg/exporter/sinks/webhook.go

@@ -12,13 +12,23 @@ import (
 )
 
 type WebhookSinker struct {
-	Url string
+	Url     string
+	Cluster string
+}
+
+type expandedEvent struct {
+	*v1.Event `json:",inline"`
+	Cluster   string `json:"cluster,omitempty"`
 }
 
 func (s *WebhookSinker) Sink(ctx context.Context, evts []*v1.Event) error {
 	var buf bytes.Buffer
 	for _, evt := range evts {
-		if bs, err := json.Marshal(evt); err != nil {
+		expandedEvt := expandedEvent{
+			Event:   evt,
+			Cluster: s.Cluster,
+		}
+		if bs, err := json.Marshal(expandedEvt); err != nil {
 			return err
 		} else if _, err := buf.Write(bs); err != nil {
 			return err