hyper-V 虚拟机的创建和内存管理

linuxddd

在Hyper-V的管理界面中可以根据向导轻易的创建出一台虚拟机,不过Hyper-V作为企业级的应用,还提供了WMI接口供外部操作.

以C#为例来通过程序创建VM.
需要通过Msvm_VirtualSystemManagementService.DefineVirtualSystem方法来创建一个虚拟机

// Get Msvm_VirtualSystemManagementService Object
ManagementClass
mc = new ManagementClass(scope, new ManagementPath("Msvm_VirtualSystemManagementService"), null);
ManagementObject objVSMS = null
foreach (ManagementObject obj in mc.GetInstances())
{
   objVSMS = obj;
}
inParams = objVSMS.GetMethodParameters(
"DefineVirtualSystem");
// Create Msvm_VirtualSystemGlobalsettingData Object
ManagementPath
wmiPath = new ManagementPath("Msvm_VirtualSystemGlobalsettingData");
ManagementClass serviceClass = new ManagementClass(scope, wmiPath, null);
ManagementObject data= serviceClass.CreateInstance();
data[
"ElementName"] = "vmName";
data[
"ExternalDataRoot"] = "c:\vms\vmName"; // VM Path, if don't specify, it will use default
data[
"SnapshotDataRoot"] = "c:\snapshots\vmName"; // snapshot path, if don't specify, it will be same with ExternalDataRoot
inParams[
"ResourcesettingData"] = null;
inParams[
"Sourcesetting"] = null;
inParams[
"SystemsettingData"] = data.GetText(TextFormat.CimDtd20);
outParams = objVSMS.InvokeMethod(
"DefineVirtualSystem", inParams, null);


Remark:这样创建出来的VM不包含任何资源(内存除外), 如果要想使用,还需要给它创建硬盘,网卡的资源文件.
如何取得已经存在的VM?
select * from Msvm_ComputerSystem Where ElementName = 'vmName
'"

如何打开关闭VM
Msvm_ComputerSystem.RequestStateChange // 2 - turn on VM, 3 - turn off vm
如果装了VM里的OS装了VM guest,还可以通过Msvm_ShutdownComponent.InitiateShutdown 来安全的关闭VM
SELECT * FROM Msvm_ShutdownComponent WHERE SystemName='vmName' 可以取得Msvm_ShutdownComponent对象

如何取得内存对象

  SELECT * FROM Msvm_MemorySettingData WHERE InstanceID LIKE "%Microsoft:vmName%"
如何修改内存大小
Msvm_MemorySettingData 对象的VirtualQuantity,Reservation,Limit 定义了内存的大小,用Msvm_VirtualSystemManagementService.ModifyVirtualSystemResources可以改变内存的大小