clustermesh: use supported ip families annotation in epslicesync

Signed-off-by: Arthur Outhenin-Chalandre <git@mrfreezeex.fr>

Author: MrFreezeex

pkg/clustermesh/endpointslicesync/service_informer.go

@@ -23,6 +23,7 @@ import (
 
 	"github.com/cilium/cilium/pkg/annotation"
 	"github.com/cilium/cilium/pkg/clustermesh/common"
+	mcsapitypes "github.com/cilium/cilium/pkg/clustermesh/mcsapi/types"
 	"github.com/cilium/cilium/pkg/clustermesh/store"
 	"github.com/cilium/cilium/pkg/k8s"
 	"github.com/cilium/cilium/pkg/k8s/resource"
@@ -171,6 +172,13 @@ func (i *meshServiceInformer) clusterSvcToSvc(clusterSvc *store.ClusterService,
 		mcsapiv1alpha1.LabelSourceCluster: clusterSvc.Cluster,
 	})
 
+	// Use the internal supported IP families annotation from our MCS-API implementation if present
+	valIPFamilies, ok := svc.Annotations[annotation.SupportedIPFamilies]
+	ipFamilies, err := mcsapitypes.IPFamiliesFromString(valIPFamilies)
+	if !ok || err != nil {
+		ipFamilies = toKubeIpFamilies(svc.Spec.IPFamilies)
+	}
+
 	return &v1.Service{
 		ObjectMeta: metav1.ObjectMeta{
 			Name:      clusterSvc.Name + "-" + clusterSvc.Cluster,
@@ -187,7 +195,7 @@ func (i *meshServiceInformer) clusterSvcToSvc(clusterSvc *store.ClusterService,
 			ClusterIP:  svc.Spec.ClusterIP,
 			ClusterIPs: svc.Spec.ClusterIPs,
 			Type:       v1.ServiceType(svc.Spec.Type),
-			IPFamilies: toKubeIpFamilies(svc.Spec.IPFamilies),
+			IPFamilies: ipFamilies,
 		},
 	}, nil
 }