pkg/k8s: wait for EndpointSlice to be ready before initializing Cilium

Similar to the v1.Endpoints, in case Cilium is running with
EndpointSlice enabled, it should wait for the k8s watchers watching
those resources before it starts.

Fixes: c3b5ca6 ("add support for k8s endpoint slice")
Signed-off-by: André Martins <andre@cilium.io>

daemon/cmd/daemon_main.go

@@ -1223,7 +1223,11 @@ func (d *Daemon) initKVStore() {
 		// up etcd so we can perform the name resolution for etcd-operator
 		// to the service IP as well perform the service -> backend IPs for
 		// that service IP.
-		d.k8sWatcher.WaitForCacheSync(watchers.K8sAPIGroupServiceV1Core, watchers.K8sAPIGroupEndpointV1Core)
+		d.k8sWatcher.WaitForCacheSync(
+			watchers.K8sAPIGroupServiceV1Core,
+			watchers.K8sAPIGroupEndpointV1Core,
+			watchers.K8sAPIGroupEndpointSliceV1Beta1Discovery,
+		)
 		log := log.WithField(logfields.LogSubsys, "etcd")
 		goopts.DialOption = []grpc.DialOption{
 			grpc.WithDialer(k8s.CreateCustomDialer(&d.k8sWatcher.K8sSvcCache, log)),

pkg/k8s/watchers/watcher.go

@@ -370,6 +370,7 @@ func (k *K8sWatcher) InitK8sSubsystem() <-chan struct{} {
 			// To perform the service translation and have the BPF LB datapath
 			// with the right service -> backend (k8s endpoints) translation.
 			K8sAPIGroupEndpointV1Core,
+			K8sAPIGroupEndpointSliceV1Beta1Discovery,
 			// We need all network policies in place before restoring to make sure
 			// we are enforcing the correct policies for each endpoint before
 			// restarting.