ExportVirtualSystemEx method of the Msvm_VirtualSystemManagementService class
Exports a virtual computer system, or a snapshot of a virtual computer system, in the "powered off" or "saved" state to a file. The virtual computer system, its associated configuration settings, and its associated resource settings will be preserved in the resulting file.
Syntax
uint32 ExportVirtualSystemEx(
[in] CIM_ComputerSystem REF ComputerSystem,
[in] string ExportDirectory,
[in] string ExportSettingData,
[out] CIM_ConcreteJob REF Job
);
Parameters
-
ComputerSystem [in]
-
Type: CIM_ComputerSystem
A reference to a CIM_ComputerSystem that represents the virtual computer system to be exported.
-
ExportDirectory [in]
-
Type: string
The fully qualified path of the directory to which the virtual computer system is to be exported. If the CreateVmExportSubdirectory property in the ExportSettingData parameter is set to True then this directory can be reused for exporting multiple virtual machines and this method places each virtual computer system definition in a separate subdirectory under this path.
-
ExportSettingData [in]
-
Type: string
An instance of the Msvm_VirtualSystemExportSettingData class that represents the virtual computer system.
-
Job [out]
-
Type: CIM_ConcreteJob
An optional reference that is returned if the operation is executed asynchronously. If present, the returned reference to an instance of CIM_ConcreteJob can be used to monitor progress and to obtain the result of the method.
Return value
Type: uint32
If this method is executed synchronously, it returns 0 if it succeeds. If this method is executed asynchronously, it returns 4096 (Method Parameters Checked - Job Started) and the Job output parameter can be used to track the progress of the asynchronous operation. Any other return value indicates an error. The return value can be one of the following values.
-
Completed with No Error (0)
-
Method Parameters Checked - Job Started (4096)
-
Failed (32768)
-
Access Denied (32769)
-
Not Supported (32770)
-
Status is unknown (32771)
-
Timeout (32772)
-
Invalid parameter (32773)
-
System is in use (32774)
-
Invalid state for this operation (32775)
-
Incorrect data type (32776)
-
System is not available (32777)
-
Out of memory (32778)
Remarks
Access to the Msvm_VirtualSystemManagementService class might be restricted by UAC Filtering. For more information, see User Account Control and WMI.
Examples
The following C# sample exports a virtual system. The referenced utilities can be found in Common Utilities for the Virtualization Samples.
[!Important]
To function correctly, the following code must be run on the VM host server, and must be run with Administrator privileges.
using System;
using System.IO;
using System.Management;
namespace HyperVSamples
{
class ExportVirtualSystemExClass
{
static string GetVirtualSystemExportSettingDataInstance(ManagementScope scope)
{
ManagementPath settingPath = new ManagementPath("Msvm_VirtualSystemExportSettingData");
ManagementClass exportSettingDataClass = new ManagementClass(scope, settingPath, null);
ManagementObject exportSettingData = exportSettingDataClass.CreateInstance();
exportSettingData["CopySnapshotConfiguration"] = 0;
exportSettingData["CopyVmRuntimeInformation"] = true;
exportSettingData["CopyVmStorage"] = true;
exportSettingData["CreateVmExportSubdirectory"] = true;
string settingData = exportSettingData.GetText(TextFormat.CimDtd20);
exportSettingData.Dispose();
exportSettingDataClass.Dispose();
return settingData;
}
static void ExportVirtualSystemEx(string vmName, string exportDirectory)
{
ManagementScope scope = new ManagementScope(@"root\virtualization", null);
ManagementObject virtualSystemService = Utility.GetServiceObject(scope, "Msvm_VirtualSystemManagementService");
ManagementBaseObject inParams = virtualSystemService.GetMethodParameters("ExportVirtualSystemEx");
ManagementObject vm = Utility.GetTargetComputer(vmName, scope);
inParams["ComputerSystem"] = vm.Path.Path;
if (!Directory.Exists(exportDirectory))
{
Directory.CreateDirectory(exportDirectory);
}
inParams["ExportDirectory"] = exportDirectory;
inParams["ExportSettingData"] = GetVirtualSystemExportSettingDataInstance(scope);
ManagementBaseObject outParams = virtualSystemService.InvokeMethod("ExportVirtualSystemEx", inParams, null);
if ((UInt32)outParams["ReturnValue"] == ReturnCode.Started)
{
if (Utility.JobCompleted(outParams, scope))
{
Console.WriteLine("VM '{0}' were exported successfully.", vm["ElementName"]);
}
else
{
Console.WriteLine("Failed to export VM");
}
}
else if ((UInt32)outParams["ReturnValue"] == ReturnCode.Completed)
{
Console.WriteLine("VM '{0}' were exported successfully.", vm["ElementName"]);
}
else
{
Console.WriteLine("Export virtual system failed with error:{0}", outParams["ReturnValue"]);
}
inParams.Dispose();
outParams.Dispose();
vm.Dispose();
virtualSystemService.Dispose();
}
static void Main(string[] args)
{
if (args != null && args.Length != 2)
{
Console.WriteLine("Usage: ExportVirtualSystemEx vmName exportDirectory");
return;
}
ExportVirtualSystemEx(args[0], args[1]);
}
}
}
The following VBScript sample exports a virtual system.
[!Important]
To function correctly, the following code must be run on the VM host server, and must be run with Administrator privileges.
option explicit
dim objWMIService
dim managementService
dim fileSystem
const JobStarting = 3
const JobRunning = 4
const JobCompleted = 7
const wmiStarted = 4096
const wmiSuccessful = 0
Main()
'-----------------------------------------------------------------
' Main
'-----------------------------------------------------------------
Sub Main()
dim computer, objArgs, vmName, vm, exportDirectory
set fileSystem = Wscript.CreateObject("Scripting.FileSystemObject")
computer = "."
set objWMIService = GetObject("winmgmts:\\" & computer & "\root\virtualization")
set managementService = objWMIService.ExecQuery("select * from Msvm_VirtualSystemManagementService").ItemIndex(0)
set objArgs = WScript.Arguments
if WScript.Arguments.Count = 2 then
vmName = objArgs.Unnamed.Item(0)
exportDirectory = objArgs.Unnamed.Item(1)
else
WScript.Echo "usage: cscript ExportVirtualSystemEx.vbs vmName exportDirectoryName"
WScript.Quit(1)
end if
set vm = GetComputerSystem(vmName)
if ExportVirtualSystemEx(vm, exportDirectory) then
WriteLog "Done"
WScript.Quit(0)
else
WriteLog "ExportVirtualSystemEx Failed."
WScript.Quit(1)
end if
End Sub
'-----------------------------------------------------------------
' Retrieve Msvm_VirtualComputerSystem from base on its ElementName
'-----------------------------------------------------------------
Function GetComputerSystem(vmElementName)
On Error Resume Next
dim query
query = Format1("select * from Msvm_ComputerSystem where ElementName = '{0}'", vmElementName)
set GetComputerSystem = objWMIService.ExecQuery(query).ItemIndex(0)
if (Err.Number <> 0) then
WriteLog Format1("Err.Number: {0}", Err.Number)
WriteLog Format1("Err.Description:{0}",Err.Description)
WScript.Quit(1)
end if
End Function
'-----------------------------------------------------------------
' Export a virtual system
'-----------------------------------------------------------------
Function ExportVirtualSystemEx(computerSystem, exportDirectory)
dim objInParam, objOutParams
dim query
dim computer
dim exportSettingData
ExportVirtualSystemEx = false
if Not fileSystem.FolderExists(exportDirectory) then
fileSystem.CreateFolder(exportDirectory)
end if
set objInParam = managementService.Methods_("ExportVirtualSystemEx").InParameters.SpawnInstance_()
objInParam.ComputerSystem = computerSystem.Path_.Path
query = Format1("ASSOCIATORS OF {{0}} WHERE resultClass = Msvm_VirtualSystemExportSettingData", computerSystem.Path_.Path)
set exportSettingData = objWMIService.ExecQuery(query).ItemIndex(0)
exportSettingData.CopyVmStorage = true
exportSettingData.CopyVmRuntimeInformation = true
exportSettingData.CreateVmExportSubdirectory = true
exportSettingData.CopySnapshotConfiguration = 0
objInParam.ExportSettingData = exportSettingData.GetText_(1)
objInParam.ExportDirectory = exportDirectory
set objOutParams = managementService.ExecMethod_("ExportVirtualSystemEx", objInParam)
if objOutParams.ReturnValue = wmiStarted then
if (WMIJobCompleted(objOutParams)) then
ExportVirtualSystemEx = true
end if
elseif (objOutParams.ReturnValue = wmiSuccessful) then
ExportVirtualSystemEx = true
else
WriteLog Format1("ExportVirtualSystemEx failed with ReturnValue {0}", objOutParams.ReturnValue)
end if
End Function
'-----------------------------------------------------------------
' Handle wmi Job object
'-----------------------------------------------------------------
Function WMIJobCompleted(outParam)
dim WMIJob, jobState
set WMIJob = objWMIService.Get(outParam.Job)
WMIJobCompleted = true
jobState = WMIJob.JobState
while jobState = JobRunning or jobState = JobStarting
WriteLog Format1("In progress... {0}% completed.",WMIJob.PercentComplete)
WScript.Sleep(1000)
set WMIJob = objWMIService.Get(outParam.Job)
jobState = WMIJob.JobState
wend
if (jobState <> JobCompleted) then
WriteLog Format1("ErrorCode:{0}", WMIJob.ErrorCode)
WriteLog Format1("ErrorDescription:{0}", WMIJob.ErrorDescription)
WMIJobCompleted = false
end if
End Function
'-----------------------------------------------------------------
' Create the console log files.
'-----------------------------------------------------------------
Sub WriteLog(line)
dim fileStream
set fileStream = fileSystem.OpenTextFile(".\ExportVirtualSystemExLog.log", 8, true)
WScript.Echo line
fileStream.WriteLine line
fileStream.Close
End Sub
'------------------------------------------------------------------------------
' The string formatting functions to avoid string concatenation.
'------------------------------------------------------------------------------
Function Format2(myString, arg0, arg1)
Format2 = Format1(myString, arg0)
Format2 = Replace(Format2, "{1}", arg1)
End Function
'------------------------------------------------------------------------------
' The string formatting functions to avoid string concatenation.
'------------------------------------------------------------------------------
Function Format1(myString, arg0)
Format1 = Replace(myString, "{0}", arg0)
End Function
For more examples demonstrating the ExportVirtualSystemEx method, see Exporting a Snapshot of a Virtual Machine.
Requirements
| Minimum supported client |
None supported |
| Minimum supported server |
Windows Server 2008 R2 |
| End of client support |
None supported |
| End of server support |
Windows Server 2012 |
| Namespace |
Root\Virtualization |
| MOF |
|