Add flag for registry service client

config/cmd/cmd.go

@@ -30,6 +30,7 @@ import (
 	"github.com/micro/go-micro/registry/gossip"
 	"github.com/micro/go-micro/registry/mdns"
 	rmem "github.com/micro/go-micro/registry/memory"
+	regSrv "github.com/micro/go-micro/registry/service"
 
 	// selectors
 	"github.com/micro/go-micro/client/selector"
@@ -190,6 +191,8 @@ var (
 	}
 
 	DefaultRegistries = map[string]func(...registry.Option) registry.Registry{
+		"go.micro.registry": regSrv.NewRegistry,
+		"service":           regSrv.NewRegistry,
 		"consul":            consul.NewRegistry,
 		"gossip":            gossip.NewRegistry,
 		"mdns":              mdns.NewRegistry,

registry/service/service.go

@@ -134,7 +134,14 @@ func NewRegistry(opts ...registry.Option) registry.Registry {
 		o(&options)
 	}
 
-	// use mdns to find the service registry
+	// the registry address
+	addrs := options.Addrs
+
+	if len(addrs) == 0 {
+		addrs = []string{"127.0.0.1:8000"}
+	}
+
+	// use mdns as a fall back in case its used
 	mReg := registry.NewRegistry()
 
 	// create new client with mdns
@@ -149,7 +156,7 @@ func NewRegistry(opts ...registry.Option) registry.Registry {
 	return &serviceRegistry{
 		opts:    options,
 		name:    name,
-		address: options.Addrs,
+		address: addrs,
 		client:  pb.NewRegistryService(name, cli),
 	}
 }