sort routes by metric

client/lookup.go

@@ -2,6 +2,7 @@ package client
 
 import (
 	"context"
+	"sort"
 
 	"github.com/micro/go-micro/v3/errors"
 	"github.com/micro/go-micro/v3/router"
@@ -34,6 +35,11 @@ func LookupRoute(ctx context.Context, req Request, opts CallOptions) ([]string,
 		return nil, errors.InternalServerError("go.micro.client", "error getting next %s node: %s", req.Service(), err.Error())
 	}
 
+	// sort by lowest metric first
+	sort.Slice(routes, func(i, j int) bool {
+		return routes[i].Metric < routes[j].Metric
+	})
+
 	var addrs []string
 
 	for _, route := range routes {