feat(server): insert the mod path

server/server.go

@@ -12,6 +12,7 @@ import (
 
 	etcdErr "github.com/coreos/etcd/error"
 	"github.com/coreos/etcd/log"
+	"github.com/coreos/etcd/mod"
 	"github.com/coreos/etcd/server/v1"
 	"github.com/coreos/etcd/server/v2"
 	"github.com/coreos/etcd/store"
@@ -55,6 +56,7 @@ func New(name string, urlStr string, listenHost string, tlsConf *TLSConfig, tlsI
 	s.handleFunc("/version", s.GetVersionHandler).Methods("GET")
 	s.installV1()
 	s.installV2()
+	s.installMod()
 
 	return s
 }
@@ -119,6 +121,11 @@ func (s *Server) installV2() {
 	s.handleFunc("/v2/speedTest", s.SpeedTestHandler).Methods("GET")
 }
 
+func (s *Server) installMod() {
+	r := s.Handler.(*mux.Router)
+	r.PathPrefix("/etcd/mod").Handler(http.StripPrefix("/etcd/mod", mod.HttpHandler()))
+}
+
 // Adds a v1 server handler to the router.
 func (s *Server) handleFuncV1(path string, f func(http.ResponseWriter, *http.Request, v1.Server) error) *mux.Route {
 	return s.handleFunc(path, func(w http.ResponseWriter, req *http.Request) error {