Azure: Poweroff VM before deletion

- Azure VM deletion takes too long when a running VM is deleted
- Stopping (Powering off) the VM before deletion should help this process

pkg/driver/driver_azure.go

@@ -89,7 +89,7 @@ func (d *AzureDriver) Create() (string, string, error) {
 					Name: &nicName,
 					InterfaceIPConfigurationPropertiesFormat: &network.InterfaceIPConfigurationPropertiesFormat{
 						PrivateIPAllocationMethod: network.Dynamic,
-						Subnet: &subnet,
+						Subnet:                    &subnet,
 					},
 				},
 			},
@@ -218,13 +218,21 @@ func (d *AzureDriver) Delete() error {
 	listOfResources := make(map[string]string)
 	d.getvms(d.MachineID, listOfResources)
 	if len(listOfResources) != 0 {
-		_, errChan := vmClient.Delete(resourceGroup, vmName, cancel)
+
+		_, errChan := vmClient.PowerOff(resourceGroup, vmName, cancel)
+		err = onErrorFail(<-errChan, fmt.Sprintf("vmClient.PowerOff failed for '%s'", vmName))
+		if err != nil {
+			return err
+		}
+		glog.V(3).Infof("PowerOff VM %s", vmName)
+
+		_, errChan = vmClient.Delete(resourceGroup, vmName, cancel)
 		err = onErrorFail(<-errChan, fmt.Sprintf("vmClient.Delete failed for '%s'", vmName))
 		if err != nil {
 			return err
 		}
+		glog.V(3).Infof("Deleted VM %s", vmName)
 	}
-	glog.V(3).Infof("Deleted VM %s", vmName)
 
 	listOfResources = make(map[string]string)
 	d.getnics(d.MachineID, listOfResources)
@@ -234,8 +242,8 @@ func (d *AzureDriver) Delete() error {
 		if err != nil {
 			return err
 		}
+		glog.V(3).Infof("Deleted NIC %s", nicName)
 	}
-	glog.V(3).Infof("Deleted NIC %s", nicName)
 
 	listOfResources = make(map[string]string)
 	d.getdisks(d.MachineID, listOfResources)
@@ -245,8 +253,8 @@ func (d *AzureDriver) Delete() error {
 		if err != nil {
 			return err
 		}
+		glog.V(3).Infof("Deleted OS-Disk %s", nicName)
 	}
-	glog.V(3).Infof("Deleted OS-Disk %s", nicName)
 
 	return err
 }