diff --git a/db/db.go b/db/db.go
index ad6229f..e5d9e14 100644
--- a/db/db.go
+++ b/db/db.go
@@ -99,6 +99,7 @@ func InitDB(addr, passwd string, db int64) error {
 
 func Save(obj interface{}, key string) (err error) {
 	result, err := json.Marshal(&obj)
+
 	if err != nil {
 		return err
 	}
@@ -112,6 +113,7 @@ func Save(obj interface{}, key string) (err error) {
 
 func Get(obj interface{}, key string) (err error) {
 	result, err := Client.Get(key).Result()
+
 	if err != nil {
 		return err
 	}
diff --git a/setting/setting.go b/setting/setting.go
index cbfe224..84c0e28 100644
--- a/setting/setting.go
+++ b/setting/setting.go
@@ -21,6 +21,7 @@ var (
 	DBURI         string
 	DBPasswd      string
 	DBDB          int64
+	BackendDriver string //Container image storage driver name
 )
 
 func SetConfig(path string) error {
@@ -103,5 +104,11 @@ func SetConfig(path string) error {
 
 	DBDB, err = conf.Int64("db::db")
 
+	if backenddriver := conf.String("backend::driver"); backenddriver != "" {
+		BackendDriver = backenddriver
+	} else if backenddriver == "" {
+		err = fmt.Errorf("BackendDriver config value is null")
+	}
+
 	return err
 }
diff --git a/utils/utils.go b/utils/utils.go
index 2d9b48e..56e0b56 100644
--- a/utils/utils.go
+++ b/utils/utils.go
@@ -1,11 +1,14 @@
 package utils
 
 import (
+	"crypto/md5"
 	"encoding/base64"
+	"encoding/hex"
 	"fmt"
 	"os"
 	"regexp"
 	"strings"
+	"time"
 )
 
 func Exist(filename string) bool {
@@ -77,3 +80,11 @@ func ValidatePassword(password string) error {
 
 	return nil
 }
+
+func MD5(key string) string {
+	md5String := fmt.Sprintf("%s%d", key, time.Now().Unix())
+	h := md5.New()
+	h.Write([]byte(md5String))
+
+	return hex.EncodeToString(h.Sum(nil))
+}