New-AzVMFromExistingResource function for creating VM from existing NIC and disks with availability set.

New-AzVMFromExistingResource.ps1

Function New-AzVMFromExistingResource() {
    [CmdletBinding()]
    param (
        [Parameter(Mandatory = $true)] [string] $ResourceGroupName,
        [Parameter(Mandatory = $true)] [string] $LocationName,
        [Parameter(Mandatory = $true)] [string] $VMName,
        [Parameter(Mandatory = $true)] [string] $VMSize,
        [Parameter(Mandatory = $true)] [string] $AVSetName,
        [Parameter(Mandatory = $true)] [string] $OSDiskName,
        [Parameter(Mandatory = $true)] [string] $NICName
    )

    # 既存の OS Disk をつかむ
    $OSDisk = Get-AzDisk -DiskName $OSDiskName -ResourceGroupName $ResourceGroupName

    # 既存の NIC をつかむ
    $NIC = Get-AzNetworkInterface -Name $NICName -ResourceGroupName $ResourceGroupName

    # 既存の AVSet をつかむ
    $AVSet = Get-AzAvailabilitySet -ResourceGroupName $ResourceGroupName -Name $AVSetName

    # 既存のリソースを組み合わせて VM を作成する
    $VirtualMachine = New-AzVMConfig -VMName $VMName -VMSize $VMSize -AvailabilitySetId $AVSet.Id
    $VirtualMachine = Set-AzVMOSDisk -VM $VirtualMachine -ManagedDiskId $OSDisk.Id -Windows -CreateOption Attach
    $VirtualMachine = Add-AzVMNetworkInterface -VM $VirtualMachine -Id $NIC.Id
    $VirtualMachine = Set-AzVMBootDiagnostic -VM $VirtualMachine -Disable

    New-AzVM -ResourceGroupName $ResourceGroupName -Location $LocationName -VM $VirtualMachine -DisableBginfoExtension -Verbose
}