chore(storage): support set db path for badger driver (#499)

* chore(storage): support set db path for badger driver

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>

* fix path

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>

* fix readme

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>

* update default value

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>

config/config.go

@@ -88,6 +88,8 @@ stat:
     path: "bunt.db"
   leveldb:
     path: "level.db"
+  badgerdb:
+    path: "badger.db"
 `)
 
 // ConfYaml is config structure.
@@ -174,11 +176,12 @@ type SectionLog struct {
 
 // SectionStat is sub section of config.
 type SectionStat struct {
-	Engine  string         `yaml:"engine"`
-	Redis   SectionRedis   `yaml:"redis"`
-	BoltDB  SectionBoltDB  `yaml:"boltdb"`
-	BuntDB  SectionBuntDB  `yaml:"buntdb"`
-	LevelDB SectionLevelDB `yaml:"leveldb"`
+	Engine   string          `yaml:"engine"`
+	Redis    SectionRedis    `yaml:"redis"`
+	BoltDB   SectionBoltDB   `yaml:"boltdb"`
+	BuntDB   SectionBuntDB   `yaml:"buntdb"`
+	LevelDB  SectionLevelDB  `yaml:"leveldb"`
+	BadgerDB SectionBadgerDB `yaml:"badgerdb"`
 }
 
 // SectionRedis is sub section of config.
@@ -204,6 +207,11 @@ type SectionLevelDB struct {
 	Path string `yaml:"path"`
 }
 
+// SectionBadgerDB is sub section of config.
+type SectionBadgerDB struct {
+	Path string `yaml:"path"`
+}
+
 // SectionPID is sub section of config.
 type SectionPID struct {
 	Enabled  bool   `yaml:"enabled"`
@@ -321,6 +329,7 @@ func LoadConf(confPath string) (ConfYaml, error) {
 	conf.Stat.BoltDB.Bucket = viper.GetString("stat.boltdb.bucket")
 	conf.Stat.BuntDB.Path = viper.GetString("stat.buntdb.path")
 	conf.Stat.LevelDB.Path = viper.GetString("stat.leveldb.path")
+	conf.Stat.BadgerDB.Path = viper.GetString("stat.badgerdb.path")
 
 	// gRPC Server
 	conf.GRPC.Enabled = viper.GetBool("grpc.enabled")