HostRewriteLiteral: operations.Authority,
				}
			}
		}

		weighted = append(weighted, clusterWeight)
	}

	// rewrite to a single cluster if there is only weighted cluster
	if len(weighted) == 1 {
		action.ClusterSpecifier = &route.RouteAction_Cluster{Cluster: weighted[0].Name}
		out.RequestHeadersToAdd = append(out.RequestHeadersToAdd, weighted[0].RequestHeadersToAdd...)