diff --git a/pkg/cloudcommon/database.go b/pkg/cloudcommon/database.go
index 38aceddfd31..89ad8c9b130 100644
--- a/pkg/cloudcommon/database.go
+++ b/pkg/cloudcommon/database.go
@@ -39,29 +39,7 @@ import (
 	"yunion.io/x/onecloud/pkg/util/dbutils"
 )
 
-func InitDB(options *common_options.DBOptions) {
-	if options.DebugSqlchemy {
-		log.Warningf("debug Sqlchemy is turned on")
-		sqlchemy.DEBUG_SQLCHEMY = true
-	}
-
-	log.Infof("Registered SQL drivers: %s", strings.Join(sql.Drivers(), ", "))
-
-	consts.QueryOffsetOptimization = options.QueryOffsetOptimization
-
-	if options.HistoricalUniqueName {
-		consts.EnableHistoricalUniqueName()
-	} else {
-		consts.DisableHistoricalUniqueName()
-	}
-
-	if options.OpsLogMaxKeepMonths > 0 {
-		consts.SetSplitableMaxKeepMonths(options.OpsLogMaxKeepMonths)
-	}
-	if options.SplitableMaxDurationHours > 0 {
-		consts.SetSplitableMaxDurationHours(options.SplitableMaxDurationHours)
-	}
-
+func InitDBConn(options *common_options.DBOptions) {
 	dialect, sqlStr, err := options.GetDBConnection()
 	if err != nil {
 		log.Fatalf("Invalid SqlConnection string: %s error: %v", options.SqlConnection, err)
@@ -103,8 +81,10 @@ func InitDB(options *common_options.DBOptions) {
 	dbConn.SetConnMaxLifetime(time.Duration(options.DbMaxWaitTimeoutSeconds) * time.Second)
 	// ConnMaxIdleTime should be half of ConnMaxLifetime
 	dbConn.SetConnMaxIdleTime(time.Duration(options.DbMaxWaitTimeoutSeconds/2) * time.Second)
+}
 
-	dialect, sqlStr, err = options.GetClickhouseConnStr()
+func InitClickhouseConn(options *common_options.DBOptions) {
+	dialect, sqlStr, err := options.GetClickhouseConnStr()
 	if err == nil {
 		// connect to clickcloud
 		// force convert sqlstr from clickhouse v2 to v1
@@ -126,6 +106,33 @@ func InitDB(options *common_options.DBOptions) {
 			consts.OpsLogWithClickhouse = true
 		}
 	}
+}
+
+func InitDB(options *common_options.DBOptions) {
+	if options.DebugSqlchemy {
+		log.Warningf("debug Sqlchemy is turned on")
+		sqlchemy.DEBUG_SQLCHEMY = true
+	}
+
+	log.Infof("Registered SQL drivers: %s", strings.Join(sql.Drivers(), ", "))
+
+	consts.QueryOffsetOptimization = options.QueryOffsetOptimization
+
+	if options.HistoricalUniqueName {
+		consts.EnableHistoricalUniqueName()
+	} else {
+		consts.DisableHistoricalUniqueName()
+	}
+
+	if options.OpsLogMaxKeepMonths > 0 {
+		consts.SetSplitableMaxKeepMonths(options.OpsLogMaxKeepMonths)
+	}
+	if options.SplitableMaxDurationHours > 0 {
+		consts.SetSplitableMaxDurationHours(options.SplitableMaxDurationHours)
+	}
+
+	InitDBConn(options)
+	InitClickhouseConn(options)
 
 	switch options.LockmanMethod {
 	case common_options.LockMethodInMemory, "":
diff --git a/pkg/dns/dns.go b/pkg/dns/dns.go
index 62258f48c66..8b8509666d4 100644
--- a/pkg/dns/dns.go
+++ b/pkg/dns/dns.go
@@ -16,8 +16,6 @@ package dns
 
 import (
 	"context"
-	"database/sql"
-	"errors"
 	"fmt"
 	"strconv"
 	"strings"
@@ -33,13 +31,15 @@ import (
 
 	"yunion.io/x/jsonutils"
 	"yunion.io/x/log"
-	"yunion.io/x/pkg/utils"
+	"yunion.io/x/pkg/errors"
 	"yunion.io/x/sqlchemy"
 	_ "yunion.io/x/sqlchemy/backends"
 
 	api "yunion.io/x/onecloud/pkg/apis/compute"
 	identity_api "yunion.io/x/onecloud/pkg/apis/identity"
+	"yunion.io/x/onecloud/pkg/cloudcommon"
 	"yunion.io/x/onecloud/pkg/cloudcommon/db"
+	common_options "yunion.io/x/onecloud/pkg/cloudcommon/options"
 	"yunion.io/x/onecloud/pkg/compute/models"
 	"yunion.io/x/onecloud/pkg/mcclient"
 	"yunion.io/x/onecloud/pkg/mcclient/auth"
@@ -99,17 +99,12 @@ func New() *SRegionDNS {
 }
 
 func (r *SRegionDNS) initDB(c *caddy.Controller) error {
-	dialect, sqlStr, err := utils.TransSQLAchemyURL(r.SqlConnection)
-	if err != nil {
-		return err
-	}
-	sqlDb, err := sql.Open(dialect, sqlStr)
-	if err != nil {
-		return err
+	options := &common_options.DBOptions{
+		SqlConnection: r.SqlConnection,
 	}
-	sqlDb.SetMaxOpenConns(defaultDbMaxOpenConn)
-	sqlDb.SetMaxIdleConns(defaultDbMaxIdleConn)
-	sqlchemy.SetDB(sqlDb)
+
+	cloudcommon.InitDBConn(options)
+
 	db.InitAllManagers()
 
 	c.OnShutdown(func() error {
@@ -206,9 +201,9 @@ func (r *SRegionDNS) ServeDNS(ctx context.Context, w dns.ResponseWriter, rmsg *d
 }
 
 var (
-	errRefused  = errors.New("refused the query")
-	errNotFound = errors.New("not found")
-	errCallNext = errors.New("continue to next")
+	errRefused  = errors.Error("refused the query")
+	errNotFound = errors.Error("not found")
+	errCallNext = errors.Error("continue to next")
 )
 
 // Services implements the ServiceBackend interface