Add support for creating an internal load balancer using the predefined IP from the control plane endpoint

Author: RnkeZ

cloud/services/compute/loadbalancers/reconcile.go

@@ -525,6 +525,9 @@ func (s *Service) createOrGetInternalAddress(ctx context.Context, lbname string)
 		log.Error(err, "Error getting subnet for Internal Load Balancer")
 		return nil, err
 	}
+	if s.scope.ControlPlaneEndpoint().Host != "" {
+		addrSpec.Address = s.scope.ControlPlaneEndpoint().Host
+	}
 	addrSpec.Subnetwork = subnet.SelfLink
 	addrSpec.Purpose = "GCE_ENDPOINT"
 	log.V(2).Info("Looking for internal address", "name", addrSpec.Name)