diff --git a/pkg/cloudcommon/db/db_dispatcher.go b/pkg/cloudcommon/db/db_dispatcher.go
index 27db1a7723..8734f564ce 100644
--- a/pkg/cloudcommon/db/db_dispatcher.go
+++ b/pkg/cloudcommon/db/db_dispatcher.go
@@ -815,11 +815,10 @@ func FetchModelObjects(modelManager IModelManager, query *sqlchemy.SQuery, targe
 	return nil
 }
 
-func DoCreate(manager IModelManager, ctx context.Context, userCred mcclient.TokenCredential, query jsonutils.JSONObject, data jsonutils.JSONObject) (IModel, error) {
-	ownerProjId, err := fetchOwnerProjectId(ctx, manager, userCred, data)
-	if err != nil {
-		return nil, err
-	}
+func DoCreate(manager IModelManager, ctx context.Context, userCred mcclient.TokenCredential, query jsonutils.JSONObject, data jsonutils.JSONObject, ownerProjId string) (IModel, error) {
+	lockman.LockClass(ctx, manager, ownerProjId)
+	defer lockman.ReleaseClass(ctx, manager, ownerProjId)
+
 	return doCreateItem(manager, ctx, userCred, ownerProjId, nil, data)
 }
 
@@ -908,22 +907,18 @@ func (dispatcher *DBModelDispatcher) Create(ctx context.Context, query jsonutils
 		return nil, httperrors.NewForbiddenError("Not allow to create item")
 	}
 
-	model, err := func() (IModel, error) {
-		lockman.LockClass(ctx, dispatcher.modelManager, ownerProjId)
-		defer lockman.ReleaseClass(ctx, dispatcher.modelManager, ownerProjId)
-
-		return doCreateItem(dispatcher.modelManager, ctx, userCred, ownerProjId, query, data)
-	}()
-
+	model, err := DoCreate(dispatcher.modelManager, ctx, userCred, query, data, ownerProjId)
 	if err != nil {
 		log.Errorf("fail to doCreateItem %s", err)
 		return nil, httperrors.NewGeneralError(err)
 	}
 
-	lockman.LockObject(ctx, model)
-	defer lockman.ReleaseObject(ctx, model)
+	func() {
+		lockman.LockObject(ctx, model)
+		defer lockman.ReleaseObject(ctx, model)
 
-	model.PostCreate(ctx, userCred, ownerProjId, query, data)
+		model.PostCreate(ctx, userCred, ownerProjId, query, data)
+	}()
 
 	OpsLog.LogEvent(model, ACT_CREATE, model.GetShortDesc(ctx), userCred)
 	logclient.AddActionLog(model, logclient.ACT_CREATE, "", userCred, true)
diff --git a/pkg/compute/hostdrivers/baremetal.go b/pkg/compute/hostdrivers/baremetal.go
new file mode 100644
index 0000000000..d6de6b4530
--- /dev/null
+++ b/pkg/compute/hostdrivers/baremetal.go
@@ -0,0 +1,60 @@
+package hostdrivers
+
+import (
+	"context"
+	"fmt"
+
+	"yunion.io/x/jsonutils"
+
+	"yunion.io/x/onecloud/pkg/cloudcommon/db/taskman"
+	"yunion.io/x/onecloud/pkg/compute/models"
+)
+
+type SBaremetalHostDriver struct {
+	SBaseHostDriver
+}
+
+func init() {
+	driver := SBaremetalHostDriver{}
+	models.RegisterHostDriver(&driver)
+}
+
+func (self *SBaremetalHostDriver) GetHostType() string {
+	return models.HOST_TYPE_BAREMETAL
+}
+
+func (self *SBaremetalHostDriver) CheckAndSetCacheImage(ctx context.Context, host *models.SHost, storageCache *models.SStoragecache, task taskman.ITask) error {
+	return fmt.Errorf("not supported")
+}
+
+func (self *SBaremetalHostDriver) RequestAllocateDiskOnStorage(ctx context.Context, host *models.SHost, storage *models.SStorage, disk *models.SDisk, task taskman.ITask, content *jsonutils.JSONDict) error {
+	return fmt.Errorf("not supported")
+}
+
+func (self *SBaremetalHostDriver) RequestDeallocateDiskOnHost(ctx context.Context, host *models.SHost, storage *models.SStorage, disk *models.SDisk, task taskman.ITask) error {
+	return fmt.Errorf("not supported")
+}
+
+func (self *SBaremetalHostDriver) RequestPrepareSaveDiskOnHost(ctx context.Context, host *models.SHost, disk *models.SDisk, imageId string, task taskman.ITask) error {
+	return fmt.Errorf("not supported")
+}
+
+func (self *SBaremetalHostDriver) RequestRebuildDiskOnStorage(ctx context.Context, host *models.SHost, storage *models.SStorage, disk *models.SDisk, task taskman.ITask, content *jsonutils.JSONDict) error {
+	return fmt.Errorf("not supported")
+}
+
+func (self *SBaremetalHostDriver) RequestResizeDiskOnHost(ctx context.Context, host *models.SHost, storage *models.SStorage, disk *models.SDisk, sizeMb int64, task taskman.ITask) error {
+	return fmt.Errorf("not supported")
+}
+
+func (self *SBaremetalHostDriver) RequestResizeDiskOnHostOnline(ctx context.Context, host *models.SHost, storage *models.SStorage, disk *models.SDisk, sizeMb int64, task taskman.ITask) error {
+	return fmt.Errorf("not supported")
+}
+
+func (self *SBaremetalHostDriver) RequestSaveUploadImageOnHost(ctx context.Context, host *models.SHost, disk *models.SDisk, imageId string, task taskman.ITask, data jsonutils.JSONObject) error {
+	return fmt.Errorf("not supported")
+}
+
+func (self *SBaremetalHostDriver) RequestUncacheImage(ctx context.Context, host *models.SHost, storageCache *models.SStoragecache, task taskman.ITask) error {
+	return fmt.Errorf("not supported")
+}
diff --git a/pkg/compute/models/hosts.go b/pkg/compute/models/hosts.go
index 1f287f7d7f..21dfb5f7cc 100644
--- a/pkg/compute/models/hosts.go
+++ b/pkg/compute/models/hosts.go
@@ -1946,18 +1946,17 @@ func (self *SHost) GetBaremetalServer() *SGuest {
 	if !self.IsBaremetal {
 		return nil
 	}
-	guestObj, err := db.NewModelObject(GuestManager)
-	if err != nil {
-		log.Errorf("%s", err)
-		return nil
-	}
+	guest := SGuest{}
+	guest.SetModelManager(GuestManager)
 	q := GuestManager.Query().Equals("host_id", self.Id).Equals("hypervisor", HOST_TYPE_BAREMETAL)
-	err = q.First(guestObj)
+	err := q.First(&guest)
 	if err != nil {
-		log.Errorf("query fail %s", err)
+		if err != sql.ErrNoRows {
+			log.Errorf("query fail %s", err)
+		}
 		return nil
 	}
-	return guestObj.(*SGuest)
+	return &guest
 }
 
 func (self *SHost) getSchedtags() []SSchedtag {
@@ -3283,10 +3282,16 @@ func (self *SHost) PerformConvertHypervisor(ctx context.Context, userCred mcclie
 	if err != nil {
 		return nil, httperrors.NewNotAcceptableError("Convert error: %s", err.Error())
 	}
-	guest, err := db.DoCreate(GuestManager, ctx, userCred, nil, params)
+	ownerProjId := userCred.GetProjectId()
+	guest, err := db.DoCreate(GuestManager, ctx, userCred, nil, params, ownerProjId)
 	if err != nil {
 		return nil, err
 	}
+	func() {
+		lockman.LockObject(ctx, guest)
+		defer lockman.ReleaseObject(ctx, guest)
+		guest.PostCreate(ctx, userCred, ownerProjId, nil, params)
+	}()
 	log.Infof("Host convert to %s", guest.GetName())
 	db.OpsLog.LogEvent(self, db.ACT_CONVERT_START, "", userCred)
 	db.OpsLog.LogEvent(guest, db.ACT_CREATE, "Convert hypervisor", userCred)