Add-WVDHostToHostpoolSpringV7.ps1

<#  
.SYNOPSIS  
    Adds an WVD Session Host to an existing WVD Hostpool using a provided registrationKey *** SPRING UPDATE 2020***
.DESCRIPTION  
    This scripts adds an WVD Session Host to an existing WVD Hostpool by performing the following action:
    - Download the WVD agent
    - Download the WVD Boot Loader
    - Install the WVD Agent, using the provided hostpoolRegistrationToken
    - Install the WVD Boot Loader
    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-WVDHostToHostpoolSpringV7.ps1
    Author     : Freek Berson - Wortell - RDSGurus
    Version    : v1.0.0
.EXAMPLE
    .\add-WVDHostToHostpoolSpringV7.ps1 registrationKey >> <yourlogdir>\add-WVDHostToHostpoolSpringV7.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\"
$WVDAgentInstaller = $RootFolder+"WVD-Agent.msi"
$WVDBootLoaderInstaller = $RootFolder+"WVD-BootLoader.msi"

<#
.DESCRIPTION
Runs defined msi's to deploy RDAgent and Bootloader
.PARAMETER programDisplayName
.PARAMETER argumentList
.PARAMETER msiOutputLogPath
.PARAMETER isUninstall
.PARAMETER msiLogVerboseOutput
#>
function RunMsiWithRetry {
    param(
        [Parameter(mandatory = $true)]
        [string]$programDisplayName,

        [Parameter(mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [String[]]$argumentList, 

        [Parameter(mandatory = $true)]
        [string]$msiOutputLogPath,

        [Parameter(mandatory = $false)]
        [switch]$isUninstall,

        [Parameter(mandatory = $false)]
        [switch]$msiLogVerboseOutput
    )
    Set-StrictMode -Version Latest
    $ErrorActionPreference = "Stop"

    if ($msiLogVerboseOutput) {
        $argumentList += "/l*vx+ ""$msiOutputLogPath""" 
    }
    else {
        $argumentList += "/l*+ ""$msiOutputLogPath"""
    }

    $retryTimeToSleepInSec = 30
    $retryCount = 0
    $sts = $null
    do {
        $modeAndDisplayName = ($(if ($isUninstall) { "Uninstalling" } else { "Installing" }) + " $programDisplayName")

        if ($retryCount -gt 0) {
            Log  "Retrying $modeAndDisplayName in $retryTimeToSleepInSec seconds because it failed with Exit code=$sts This will be retry number $retryCount"
            Start-Sleep -Seconds $retryTimeToSleepInSec
        }

        Log ( "$modeAndDisplayName" + $(if ($msiLogVerboseOutput) { " with verbose msi logging" } else { "" }))


        $processResult = Start-Process -FilePath "msiexec.exe" -ArgumentList $argumentList -Wait -Passthru
        $sts = $processResult.ExitCode

        $retryCount++
    } 
    while ($sts -eq 1618 -and $retryCount -lt 20) 

    if ($sts -eq 1618) {
        Log  "Stopping retries for $modeAndDisplayName. The last attempt failed with Exit code=$sts which is ERROR_INSTALL_ALREADY_RUNNING"
        throw "Stopping because $modeAndDisplayName finished with Exit code=$sts"
    }
    else {
        Log "$modeAndDisplayName finished with Exit code=$sts"
    }

    return $sts
} 

<#
.DESCRIPTION
Uninstalls any existing RDAgent BootLoader and RD Infra Agent installations and then installs the RDAgent BootLoader and RD Infra Agent using the specified registration token.
.PARAMETER AgentInstallerFolder
Required path to MSI installer file
.PARAMETER AgentBootServiceInstallerFolder
Required path to MSI installer file
#>
function InstallRDAgents {
    Param(
        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [string]$AgentInstallerFolder,
        
        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [string]$AgentBootServiceInstallerFolder,
    
        [Parameter(Mandatory = $true)]
        [ValidateNotNullOrEmpty()]
        [string]$RegistrationToken,
    
        [Parameter(mandatory = $false)]
        [switch]$EnableVerboseMsiLogging
    )

    $ErrorActionPreference = "Stop"

    Log  "Boot loader folder is $AgentBootServiceInstallerFolder"
    $AgentBootServiceInstaller = $AgentBootServiceInstallerFolder + '\WVD-BootLoader.msi'

    Log  "Agent folder is $AgentInstallerFolder"
    $AgentInstaller = $AgentInstallerFolder + '\WVD-Agent.msi'

    if (!$RegistrationToken) {
        throw "No registration token specified"
    }

    $msiNamesToUninstall = @(
        @{ msiName = "Remote Desktop Services Infrastructure Agent"; displayName = "RD Infra Agent"; logPath = "$AgentInstallerFolder\AgentUninstall.txt"}, 
        @{ msiName = "Remote Desktop Agent Boot Loader"; displayName = "RDAgentBootLoader"; logPath = "$AgentInstallerFolder\AgentBootLoaderUnInstall.txt"}
    )
    
    foreach($u in $msiNamesToUninstall) {
        while ($true) {
            try {
                $installedMsi = Get-Package -ProviderName msi -Name $u.msiName
            }
            catch {
                if ($PSItem.FullyQualifiedErrorId -eq "NoMatchFound,Microsoft.PowerShell.PackageManagement.Cmdlets.GetPackage") {
                    break
                }
    
                throw;
            }
    
            $oldVersion = $installedMsi.Version
            $productCodeParameter = $installedMsi.FastPackageReference
    
            RunMsiWithRetry -programDisplayName "$($u.displayName) $oldVersion" -isUninstall -argumentList @("/x $productCodeParameter", "/quiet", "/qn", "/norestart", "/passive") -msiOutputLogPath $u.logPath -msiLogVerboseOutput:$EnableVerboseMsiLogging
        }
    }

    Log  "Installing RD Infra Agent on VM $AgentInstaller"
    RunMsiWithRetry -programDisplayName "RD Infra Agent" -argumentList @("/i $AgentInstaller", "/quiet", "/qn", "/norestart", "/passive", "REGISTRATIONTOKEN=$RegistrationToken") -msiOutputLogPath "C:\Users\AgentInstall.txt" -msiLogVerboseOutput:$EnableVerboseMsiLogging

    Log  "Installing RDAgent BootLoader on VM $AgentBootServiceInstaller"
    RunMsiWithRetry -programDisplayName "RDAgent BootLoader" -argumentList @("/i $AgentBootServiceInstaller", "/quiet", "/qn", "/norestart", "/passive") -msiOutputLogPath "C:\Users\AgentBootLoaderInstall.txt" -msiLogVerboseOutput:$EnableVerboseMsiLogging

    $bootloaderServiceName = "RDAgentBootLoader"
    $startBootloaderRetryCount = 0
    while ( -not (Get-Service $bootloaderServiceName -ErrorAction SilentlyContinue)) {
        $retry = ($startBootloaderRetryCount -lt 6)
        $msgToWrite = "Service $bootloaderServiceName was not found. "
        if ($retry) { 
            $msgToWrite += "Retrying again in 30 seconds, this will be retry $startBootloaderRetryCount" 
            Log  $msgToWrite
        } 
        else {
            $msgToWrite += "Retry limit exceeded" 
            Log $msgToWrite
            throw $msgToWrite
        }
            
        $startBootloaderRetryCount++
        Start-Sleep -Seconds 30
    }

    Log  "Starting service $bootloaderServiceName"
    Start-Service $bootloaderServiceName
}

#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" 
}

log $registrationKey 
Log  "registrationKey: $registrationKey"

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

Log "Calling functions to install agent and bootloader"
InstallRDAgents -AgentBootServiceInstallerFolder $RootFolder -AgentInstallerFolder $RootFolder -RegistrationToken $registrationKey -EnableVerboseMsiLogging:$false

Log "Finished"