jscarle / hyperv.net Goto Github PK

How is it possible to add an existing VHD/VHDX to a virtual machine?

I can create a Virtual Hard Drive and subsequently a Virtual Hard Disk, but I cannot point it to an existing path?

Can you provide an example of how do do this?

Hello, do you have any examples of using this library? Can you view the information about Hyper-V virtual machine! thank you

Hi,

I am so happy that I found this project. I have been banging my head the last week.

I have already imported a VM, and now I want to change the number of processors of the virtual machine. I can only find this in the CreateVirtualMachine (in VMMS_public.cs).

My question is: Is there a way to change the number of processors on an existing VM?

(I see that this is relates to another "issue" here (#7), where they want to change something on an existing VM).

Comment: The reason for changing in an existing VM is, that I use TPM, and the TPM is imported and checked against the Host Guardian Service. So it will not work for me to make a new VM, unless I can import only the TPM (I don't thisnk that is possible).

I think I just found a solution (I used the code from https://github.com/jscarle/HyperV.NET):

// Main program:
ManagementObject systemSettings = CreateSettings(Settings.System);
ManagementObject virtualMachine = GetVm.GetVmClass.GetVm(".", "MyVm");
ManagementObject processorSettings = GetRelatedSettings(systemSettings, Settings.Processor);
processorResource["VirtualQuantity"] = 4;
ModifyResourceSettings(new ManagementObject[] { processorSettings }, out _);

I used these functions from https://github.com/jscarle/HyperV.NET. But may have changed them a bit. Remember to include the WMI_extensions file form the repo (for ToStringArray() and more):

// Extra functions and stuff:

static internal ManagementObject CreateSettings(Settings settings)
        {
            string hostname = ".";
            System.Management.ManagementScope virtualizationScope = new System.Management.ManagementScope(@"\\" + hostname + @"\root\virtualization\v2", null);

            using (ManagementClass managementClass = new ManagementClass(SettingsClass(settings)))
            {
                managementClass.Scope = virtualizationScope;
                return managementClass.CreateInstance();
            }
        }

static internal void ModifyResourceSettings(ManagementObject[] resourceSettings, out ManagementObject[] resultingResourceSettings)
        {
            string hostname = ".";
            System.Management.ManagementScope scope = new System.Management.ManagementScope(@"\\" + hostname + @"\root\virtualization\v2", null);

            using (ManagementObject managementService = WmiUtilities.GetVirtualMachineManagementService(scope))
            using (ManagementBaseObject inputParameters = managementService.GetMethodParameters("ModifyResourceSettings"))
            {
                inputParameters["ResourceSettings"] = resourceSettings.ToStringArray();
                using (ManagementBaseObject outputParameters = managementService.InvokeMethod("ModifyResourceSettings", inputParameters, null))
                {
                    WmiUtilities.ValidateOutput(outputParameters, scope);
                    resultingResourceSettings = ((string[])outputParameters["ResultingResourceSettings"]).ToObjectArray();
                }
            }
        }

internal static ManagementObject GetRelatedSettings(ManagementObject instance, Settings settings)
        {
            return WmiUtilities.GetFirstObjectFromCollection(instance.GetRelated(SettingsClass(settings)));
        }

Is there any function in the VMMS class, that will help to fetch the MAC address of the recently created VM?

am trying to create a virtual machine but resourcePool is being null for resourceSubType = "Microsoft:Hyper-V:Memory" and resourcePoolClass = "Msvm_ResourcePool":-

ObjectQuery query = new ObjectQuery($"SELECT * FROM {resourcePoolClass} WHERE ResourceSubType = "{resourceSubType}" AND Primordial = True");
using (ManagementObjectSearcher searcher = new ManagementObjectSearcher(virtualizationScope, query))
using (ManagementObject resourcePool = searcher.Get().First())

Please how may I resolve this issue?

NET 5.0 reached the end of support on May 10, 2022.

Further, Microsoft will no longer provide updates including security fixes, or technical support for .NET5.0. It is strongly recommended to migrate applications to .NET 6.0.

For more info, please refer to the official announcement: https://devblogs.microsoft.com/dotnet/dotnet-5-end-of-support-update/

Hello, may I ask how to call the vhdx template when creating a VM, and then use the password configured by myself as the login password? For example, I place the vhdx template of Centos7.9 in a directory, obtain the template name during installation, install the system, and use the system password defined by myself after installation

The AssemblyInfo.cs does in fact get updated as reflected in the build, but the repository is unchanged.

Enabling Trusted Platform Module (TPM) flag by setting value to True did not enable TPM on Hyper-V machine.

Code used:

vmDefinition.NetworkAdapters[0].VirtualSwitch = "Default Switch";
vmDefinition.AutomaticStop.Action = AutomaticStopAction.TurnOff;
vmDefinition.Checkpoints.Type = CheckpointType.None;  // do not use checkpoints in dev
vmDefinition.AutomaticStart.Action = AutomaticStartAction.Nothing;
vmDefinition.Security.TrustedPlatformModule = true;  // enable TPM

Reading through the source files, it indicated to me that this would be the correct way to enable. The code above would enable SecureBoot by default.

Pursuant to this, I did adjust the code to include this SecureBoot first then re-run as follows:

vmDefinition.NetworkAdapters[0].VirtualSwitch = "Default Switch";
vmDefinition.AutomaticStop.Action = AutomaticStopAction.TurnOff;
vmDefinition.Checkpoints.Type = CheckpointType.None;  // do not use checkpoints in dev
vmDefinition.AutomaticStart.Action = AutomaticStartAction.Nothing;
vmDefinition.Security.SecureBoot = true;  // enable SecureBoot
vmDefinition.Security.TrustedPlatformModule = true;  // enable TPM

Now when I check the Hyper-V machine manually, I can see the TPM is enabled.

This was strange as although the SecureBoot value was True. However by manually setting this flag, I was finally able to force enable TPM too.

Is there any feature to fetch the list of virtual machines available in the current host machine?

After a VM has been created using the VMMS service, how could we start the machine automatically?

How to list all virtual machines?