add ob configserver (#943)

tools/ob-configserver/cmd/main.go

@@ -0,0 +1,80 @@
+/**
+ * Copyright (c) 2021 OceanBase
+ * OceanBase CE is licensed under Mulan PubL v2.
+ * You can use this software according to the terms and conditions of the Mulan PubL v2.
+ * You may obtain a copy of Mulan PubL v2 at:
+ *          http://license.coscl.org.cn/MulanPubL-2.0
+ * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+ * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+ * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+ * See the Mulan PubL v2 for more details.
+ */
+
+package main
+
+import (
+	"os"
+
+	"github.com/pkg/errors"
+	log "github.com/sirupsen/logrus"
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+
+	"github.com/oceanbase/configserver/config"
+	"github.com/oceanbase/configserver/logger"
+	"github.com/oceanbase/configserver/server"
+)
+
+var (
+	configserverCommand = &cobra.Command{
+		Use:   "configserver",
+		Short: "configserver is used to store and query ob rs_list",
+		Long:  "configserver is used to store and query ob rs_list, used by observer, obproxy and other tools",
+		Run: func(cmd *cobra.Command, args []string) {
+			err := runConfigServer()
+			if err != nil {
+				log.WithField("args:", args).Errorf("start configserver failed: %v", err)
+			}
+		},
+	}
+)
+
+func init() {
+	configserverCommand.PersistentFlags().StringP("config", "c", "etc/config.yaml", "config file")
+	_ = viper.BindPFlag("config", configserverCommand.PersistentFlags().Lookup("config"))
+}
+
+func main() {
+	if err := configserverCommand.Execute(); err != nil {
+		log.WithField("args", os.Args).Errorf("configserver execute failed %v", err)
+	}
+}
+
+func runConfigServer() error {
+	configFilePath := viper.GetString("config")
+	configServerConfig, err := config.ParseConfigServerConfig(configFilePath)
+	if err != nil {
+		return errors.Wrap(err, "read and parse configserver config")
+	}
+
+	// init logger
+	logger.InitLogger(logger.LoggerConfig{
+		Level:      configServerConfig.Log.Level,
+		Filename:   configServerConfig.Log.Filename,
+		MaxSize:    configServerConfig.Log.MaxSize,
+		MaxAge:     configServerConfig.Log.MaxAge,
+		MaxBackups: configServerConfig.Log.MaxBackups,
+		LocalTime:  configServerConfig.Log.LocalTime,
+		Compress:   configServerConfig.Log.Compress,
+	})
+
+	// init config server
+	configServer := server.NewConfigServer(configServerConfig)
+
+	err = configServer.Run()
+	if err != nil {
+		return errors.Wrap(err, "start config server")
+	}
+
+	return nil
+}