Clone-HyperV.ps1

Param (
    [string]$VMName,
    [int]$vCPU,
    [int]$MemoryGB
)

$Settings = New-Object PsObject -Property @{
    Name = $VMName
    vCPU = $vCPU
    MemoryStartupBytes = [int]$MemoryGB * 1GB
    BaseImage = "C:\\Hyper-V\\VHDs\\Base_Image.vhdx"
    ExternalNet = "vNet - External"
    InternalNet = "vNet - Internal"
}

$vmhost = Get-VMHost

if ((Get-VM -Name $Settings.Name -ErrorAction SilentlyContinue) -or (Test-Path -Path "$($vmhost.VirtualHardDiskPath)\\$($Settings.Name).vhdx")) {
    throw "VM or Virtual Disk Already Exists"
}

Write-Host "Cloning VM Base-Image..."
$BaseImage = Get-Item -Path $Settings.BaseImage
$BaseImage | Copy-Item -Destination "$($vmhost.VirtualHardDiskPath)\\$($Settings.Name).vhdx" -Force

Write-Host "Creating VM..."
$VM = New-VM -Name $Settings.Name `
                -MemoryStartupBytes $Settings.MemoryStartupBytes `
                -BootDevice VHD `
                -VHDPath "$($vmhost.VirtualHardDiskPath)\\$($Settings.Name).vhdx" `
                -Path $vmhost.VirtualMachinePath `
                -Generation 1 `
                -Switch $Settings.ExternalNet

$VM | Set-VMProcessor -Count $Settings.vCPU

Write-Host "Configuring VM..."

### This might not work for you if you don't have internal networking setup between VMs and the VMHost
#$VM | Add-VMNetworkAdapter -SwitchName $Settings.InternalNet -DynamicMacAddress
#$VM | Get-VMNetworkAdapter | ? { $_.SwitchName -eq $Settings.InternalNet } | Set-VMNetworkAdapterVlan -Access -VlanId 2

$VM | Enable-VMIntegrationService -Name "Guest Service Interface"

Write-Host "Starting VM..."
$VM | Start-VM

$timeout = $(Get-Date) + $(New-TimeSpan -Minutes 3)
                
Do {
    $IpAddresses = $VM | Select-Object -ExpandProperty NetworkAdapters | Select-Object IPAddresses, Status
    if ($(Get-Date) -gt $timeout) { throw "Failed to get IP Address within timeout." }
}
Until ($IpAddresses.IPAddresses -ne $null)

$Settings | Add-Member -MemberType NoteProperty -Name IpAddresses -Value $IpAddresses

return $Settings