implement sysdisk interface for openstack and huawei driver

pkg/compute/guestdrivers/huawei.go

@@ -25,6 +25,14 @@ func (self *SHuaweiGuestDriver) GetHypervisor() string {
 	return models.HYPERVISOR_HUAWEI
 }
 
+func (self *SHuaweiGuestDriver) GetDefaultSysDiskBackend() string {
+	return models.STORAGE_HUAWEI_SATA
+}
+
+func (self *SHuaweiGuestDriver) GetMinimalSysDiskSizeGb() int {
+	return 10
+}
+
 func (self *SHuaweiGuestDriver) ChooseHostStorage(host *models.SHost, backend string) *models.SStorage {
 	storages := host.GetAttachedStorages("")
 	for i := 0; i < len(storages); i += 1 {

pkg/compute/guestdrivers/openstack.go

@@ -2,6 +2,7 @@ package guestdrivers
 
 import (
 	"yunion.io/x/onecloud/pkg/compute/models"
+	"yunion.io/x/onecloud/pkg/compute/options"
 )
 
 type SOpenStackGuestDriver struct {
@@ -16,3 +17,11 @@ func init() {
 func (self *SOpenStackGuestDriver) GetHypervisor() string {
 	return models.HYPERVISOR_OPENSTACK
 }
+
+func (self *SOpenStackGuestDriver) GetDefaultSysDiskBackend() string {
+	return models.STORAGE_OPENSTACK_ISCSI
+}
+
+func (self *SOpenStackGuestDriver) GetMinimalSysDiskSizeGb() int {
+	return options.Options.DefaultDiskSizeMB / 1024
+}

pkg/compute/models/storages.go

@@ -62,6 +62,9 @@ const (
 	STORAGE_HUAWEI_SSD  = "SSD"  // 超高IO云硬盘
 	STORAGE_HUAWEI_SAS  = "SAS"  // 高IO云硬盘
 	STORAGE_HUAWEI_SATA = "SATA" // 普通IO云硬盘
+
+	// openstack
+	STORAGE_OPENSTACK_ISCSI = "iscsi"
 )
 
 const (