etcdctlv3: support endpoint flag

etcdctlv3/command/delete_range_command.go

@@ -44,7 +44,7 @@ func deleteRangeCommandFunc(c *cli.Context) {
 	if len(c.Args()) > 1 {
 		rangeEnd = []byte(c.Args()[1])
 	}
-	conn, err := grpc.Dial("127.0.0.1:12379")
+	conn, err := grpc.Dial(c.GlobalString("endpoint"))
 	if err != nil {
 		panic(err)
 	}

etcdctlv3/command/put_command.go

@@ -41,7 +41,7 @@ func putCommandFunc(c *cli.Context) {
 
 	key := []byte(c.Args()[0])
 	value := []byte(c.Args()[1])
-	conn, err := grpc.Dial("127.0.0.1:12379")
+	conn, err := grpc.Dial(c.GlobalString("endpoint"))
 	if err != nil {
 		panic(err)
 	}

etcdctlv3/command/range_command.go

@@ -44,7 +44,7 @@ func rangeCommandFunc(c *cli.Context) {
 	if len(c.Args()) > 1 {
 		rangeEnd = []byte(c.Args()[1])
 	}
-	conn, err := grpc.Dial("127.0.0.1:12379")
+	conn, err := grpc.Dial(c.GlobalString("endpoint"))
 	if err != nil {
 		panic(err)
 	}

etcdctlv3/command/txn_command.go

@@ -51,7 +51,7 @@ func txnCommandFunc(c *cli.Context) {
 		next = next(txn, reader)
 	}
 
-	conn, err := grpc.Dial("127.0.0.1:12379")
+	conn, err := grpc.Dial(c.GlobalString("endpoint"))
 	if err != nil {
 		panic(err)
 	}

etcdctlv3/main.go

@@ -27,6 +27,9 @@ func main() {
 	app.Name = "etcdctlv3"
 	app.Version = version.Version
 	app.Usage = "A simple command line client for etcd3."
+	app.Flags = []cli.Flag{
+		cli.StringFlag{Name: "endpoint", Value: "127.0.0.1:2378", Usage: "gRPC endpoint"},
+	}
 	app.Commands = []cli.Command{
 		command.NewRangeCommand(),
 		command.NewPutCommand(),