Add service API handler stubs for status, stop and restart (#3417)

cmd/admin-rpc-server.go

@@ -0,0 +1,63 @@
+/*
+ * Minio Cloud Storage, (C) 2016 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package cmd
+
+import (
+	"net/rpc"
+
+	router "github.com/gorilla/mux"
+)
+
+const servicePath = "/admin/service"
+
+// serviceCmd - exports RPC methods for service status, stop and
+// restart commands.
+type serviceCmd struct {
+	loginServer
+}
+
+// Shutdown - Shutdown this instance of minio server.
+func (s *serviceCmd) Shutdown(args *GenericArgs, reply *GenericReply) error {
+	if !isRPCTokenValid(args.Token) {
+		return errInvalidToken
+	}
+	globalServiceSignalCh <- serviceStop
+	return nil
+}
+
+// Restart - Restart this instance of minio server.
+func (s *serviceCmd) Restart(args *GenericArgs, reply *GenericReply) error {
+	if !isRPCTokenValid(args.Token) {
+		return errInvalidToken
+	}
+	globalServiceSignalCh <- serviceRestart
+	return nil
+}
+
+// registerAdminRPCRouter - registers RPC methods for service status,
+// stop and restart commands.
+func registerAdminRPCRouter(mux *router.Router) error {
+	adminRPCHandler := &serviceCmd{}
+	adminRPCServer := rpc.NewServer()
+	err := adminRPCServer.RegisterName("Service", adminRPCHandler)
+	if err != nil {
+		return traceError(err)
+	}
+	adminRouter := mux.NewRoute().PathPrefix(reservedBucket).Subrouter()
+	adminRouter.Path(servicePath).Handler(adminRPCServer)
+	return nil
+}