diff --git a/pkg/cloudprovider/consts.go b/pkg/cloudprovider/consts.go
index a4c7137159..8013f2426a 100644
--- a/pkg/cloudprovider/consts.go
+++ b/pkg/cloudprovider/consts.go
@@ -5,10 +5,12 @@ import (
 )
 
 const (
-	CloudVMStatusRunning = "running"
-	CloudVMStatusSuspend = "suspend"
-	CloudVMStatusStopped = "stopped"
-	CloudVMStatusOther   = "other"
+	CloudVMStatusRunning      = "running"
+	CloudVMStatusSuspend      = "suspend"
+	CloudVMStatusStopped      = "stopped"
+	CloudVMStatusChangeFlavor = "change_flavor"
+	CloudVMStatusDeploying    = "deploying"
+	CloudVMStatusOther        = "other"
 )
 
 var ErrNotFound = errors.New("id not found")
diff --git a/pkg/compute/guestdrivers/managedvirtual.go b/pkg/compute/guestdrivers/managedvirtual.go
index 1e716a50a7..5df4cd8180 100644
--- a/pkg/compute/guestdrivers/managedvirtual.go
+++ b/pkg/compute/guestdrivers/managedvirtual.go
@@ -228,6 +228,10 @@ func (self *SManagedVirtualizedGuestDriver) RequestSyncstatusOnHost(ctx context.
 		status = cloudprovider.CloudVMStatusStopped
 	case models.VM_STOPPING:
 		status = cloudprovider.CloudVMStatusRunning
+	case models.VM_CHANGE_FLAVOR:
+		status = cloudprovider.CloudVMStatusChangeFlavor
+	case models.VM_DEPLOYING:
+		status = cloudprovider.CloudVMStatusDeploying
 	default:
 		status = cloudprovider.CloudVMStatusOther
 	}
diff --git a/pkg/util/openstack/flavor.go b/pkg/util/openstack/flavor.go
index 748e48eef1..8835499aba 100644
--- a/pkg/util/openstack/flavor.go
+++ b/pkg/util/openstack/flavor.go
@@ -99,6 +99,9 @@ func (region *SRegion) syncFlavor(name string, cpu, memoryMb, diskGB int) (strin
 }
 
 func (region *SRegion) CreateFlavor(name string, cpu int, memoryMb int, diskGB int) (*SFlavor, error) {
+	if diskGB < 30 {
+		diskGB = 30
+	}
 	params := map[string]map[string]interface{}{
 		"flavor": {
 			"name":  name,
diff --git a/pkg/util/openstack/host.go b/pkg/util/openstack/host.go
index 2344cfc3d0..a9b69c6096 100644
--- a/pkg/util/openstack/host.go
+++ b/pkg/util/openstack/host.go
@@ -156,7 +156,7 @@ func (host *SHost) CreateVM(desc *cloudprovider.SManagedVMCreateConfig) (cloudpr
 		return nil, err
 	}
 
-	sysDiskSizeGB := image.Size / 1024 / 1024
+	sysDiskSizeGB := image.Size / 1024 / 1024 / 1024
 	if desc.SysDisk.SizeGB < sysDiskSizeGB {
 		desc.SysDisk.SizeGB = sysDiskSizeGB
 	}
diff --git a/pkg/util/openstack/instance.go b/pkg/util/openstack/instance.go
index 2ed3213075..a9fe8f71e3 100644
--- a/pkg/util/openstack/instance.go
+++ b/pkg/util/openstack/instance.go
@@ -298,8 +298,10 @@ func (instance *SInstance) GetStatus() string {
 		return models.VM_MIGRATING
 	case INSTANCE_STATUS_PAUSED, INSTANCE_STATUS_SUSPENDED:
 		return models.VM_SUSPEND
-	case INSTANCE_STATUS_RESIZE, INSTANCE_STATUS_VERIFY_RESIZE:
+	case INSTANCE_STATUS_RESIZE:
 		return models.VM_CHANGE_FLAVOR
+	case INSTANCE_STATUS_VERIFY_RESIZE:
+		return INSTANCE_STATUS_VERIFY_RESIZE
 	case INSTANCE_STATUS_SHELVED, INSTANCE_STATUS_SHELVED_OFFLOADED, INSTANCE_STATUS_SHUTOFF, INSTANCE_STATUS_SOFT_DELETED:
 		return models.VM_READY
 	default:
@@ -412,7 +414,13 @@ func (region *SRegion) ChangeConfig(instance *SInstance, flavorId string) error
 	}
 	_, maxVersion, _ := region.GetVersion("compute")
 	_, _, err := region.Post("compute", fmt.Sprintf("/servers/%s/action", instance.ID), maxVersion, jsonutils.Marshal(params))
-	return err
+	if err != nil {
+		return err
+	}
+	if err := cloudprovider.WaitStatus(instance, INSTANCE_STATUS_VERIFY_RESIZE, time.Second*3, time.Minute*4); err != nil {
+		return err
+	}
+	return region.instanceOperation(instance.ID, "confirmResize")
 }
 
 func (instance *SInstance) AttachDisk(ctx context.Context, diskId string) error {