Add-AVDGPUHostToHostpool.ps1

<#  
.SYNOPSIS  
    Adds an AVD Session Host to an existing AVD Hostpool using a provided registrationKey and configures GPU and direct path settings
.DESCRIPTION  
    This scripts adds an AVD Session Host to an existing AVD Hostpool by performing the following action:
    - Download the AVD agent
    - Download the AVD Boot Loader
    - Download the AVD MMR Extension
    - Install the AVD Agent, using the provided hostpoolRegistrationToken
    - Install the AVD Boot Loader
    - Install the AVD MMR Extension
    - Configure GPU settings
    - Configure Direct Path
    The script is designed and optimized to run as PowerShell Extension as part of a JSON deployment.
    V1 of this script generates its own host pool registrationkey, this V2 version accepts the registrationkey as a parameter
.NOTES  
    File Name  : Add-AVDGPUHostToHostpool.ps1
    Author     : Freek Berson - Wortell - RDSGurus
    Version    : v1.0.0
.EXAMPLE
    .\Add-AVDGPUHostToHostpool.ps1 registrationKey >> <yourlogdir>\add-AVDHostToHostpoolSpringV2.log
.DISCLAIMER
    Use at your own risk. This scripts are provided AS IS without warranty of any kind. The author further disclaims all implied
    warranties including, without limitation, any implied warranties of merchantability or of fitness for a particular purpose. The entire risk
    arising out of the use or performance of the scripts and documentation remains with you. In no event shall the author, or anyone else involved
    in the creation, production, or delivery of the scripts be liable for any damages whatsoever (including, without limitation, damages for loss
    of business profits, business interruption, loss of business information, or other pecuniary loss) arising out of the use of or inability
    to use the this script.
#>

#Get Parameters
$registrationKey = $args[0]

#Set Variables
$RootFolder = "C:\Packages\Plugins\"
$AVDAgentInstaller = $RootFolder + "AVD-Agent.msi"
$AVDBootLoaderInstaller = $RootFolder + "AVD-BootLoader.msi"
$AVDMMRInstaller = $RootFolder + "AVD-MMR.msi"

#Create Folder structure
if (!(Test-Path -Path $RootFolder)) { New-Item -Path $RootFolder -ItemType Directory }

#Configure logging
function log {
    param([string]$message)
    "`n`n$(get-date -f o)  $message" 
}

#Download all source file async and wait for completion
log  "Download AVD Agent & bootloader"
$files = @(
    @{url = "https://query.prod.cms.rt.microsoft.com/cms/api/am/binary/RWrmXv"; path = $AVDAgentInstaller }
    @{url = "https://query.prod.cms.rt.microsoft.com/cms/api/am/binary/RWrxrH"; path = $AVDBootLoaderInstaller }
    @{url = "https://query.prod.cms.rt.microsoft.com/cms/api/am/binary/RWIzIk"; path = $AVDMMRInstaller }
)
$workers = foreach ($f in $files) { 
    $wc = New-Object System.Net.WebClient
    Write-Output $wc.DownloadFileTaskAsync($f.url, $f.path)
}
$workers.Result

#Install the AVD Agent
Log "Install the AVD Agent"
Start-Process -FilePath "msiexec.exe" -ArgumentList "/i $AVDAgentInstaller", "/quiet", "/qn", "/norestart", "/passive", "REGISTRATIONTOKEN=$registrationKey", "/l* C:\Users\AgentInstall.txt" | Wait-process

#Wait to ensure AVD Agent has enough time to finish
Start-sleep 30

#Install the AVD Bootloader
Log "Install the Boot Loader"
Start-Process -FilePath "msiexec.exe" -ArgumentList "/i $AVDBootLoaderInstaller", "/quiet", "/qn", "/norestart", "/passive", "/l* C:\Users\AgentBootLoaderInstall.txt" | Wait-process

#Install the AVD MultiMedia Redirection Browser Extension
Log "Install the Boot Loader"
Start-Process -FilePath "msiexec.exe" -ArgumentList "/i $AVDMMRInstaller", "/quiet", "/qn", "/norestart", "/passive" | Wait-process

#Configure GPU settngs
New-ItemProperty -Path 'HKLM:\SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services' -Name 'bEnumerateHWBeforeSW' -Value 1  -PropertyType 'DWORD'
New-ItemProperty -Path 'HKLM:\SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services' -Name 'AVCHardwareEncodePreferred' -Value 1  -PropertyType 'DWORD'

#Configure direct path settings
New-ItemProperty -Path 'HKLM:\SYSTEM\CurrentControlSet\Control\Terminal Server\WinStations' -Name 'fUseUdpPortRedirector' -PropertyType:dword -Value 1 -Force
New-ItemProperty -Path 'HKLM:\SYSTEM\CurrentControlSet\Control\Terminal Server\WinStations' -Name 'UdpPortNumber' -PropertyType:dword -Value 3390 -Force

Log "Finished"