artms 515 change ipfamilypolicy

IPv4/IPv6 dual-stack networking graduates to GA. Since 1.21, Kubernetes clusters are enabled to support dual-stack networking by default. In 1.23, the IPv6DualStack feature gate is removed.

For Headless Service , If the service doesn't have any selectors defined then it is defaulted to RequireDualStack on any cluster (single- or dual-stack)

https://github.com/kubernetes/kubernetes/blob/e6c093d87ea4cbb530a7b2ae91e54c0842d8308a/pkg/registry/core/service/storage/storage.go#L274

pkg/reconciliation/construct_service.go

@@ -144,6 +144,9 @@ func newAdditionalSeedServiceForCassandraDatacenter(dc *api.CassandraDatacenter)
 	service.Spec.Type = "ClusterIP"
 	service.Spec.ClusterIP = "None"
 	service.Spec.PublishNotReadyAddresses = true
+	// Adding ipFamilies and ipFamilyPolicy
+	service.Spec.IPfamilies = []corev1.IPFamily{"IPv4"}
+	service.Spec.IPFamilyPolicy = corev1.IPFamilyPolicySingleStack
 
 	addAdditionalOptions(&service, &dc.Spec.AdditionalServiceConfig.AdditionalSeedService)