PowerShell script to automatically install the latest version of Datadog on a Windows Host

Datadog-Installer.ps1

<#
    .SYNOPSIS
    This PowerShell script is designed to install the latest Datadog agent seamlessly on windows

    .PARAMETER APIKey
    The API Key for your datadog installation. Contact support if you don't have one!

    .PARAMETER Location
    Where the MSI should be dropped. Defaults to C:\Windows\temp

    .PARAMETER Hostname
    Name of the host. Defaults to the Windows hostname

    .PARAMETER Tags
    Tags to assign.

    .EXAMPLE
    .\Datadog-Installer.ps1 -APIKey INSERTKEYHERE -Tags MyTag1,MyTag2
#>
[CmdletBinding()]
Param(

    [Parameter(Mandatory=$True)]
    [string]   $APIKey,

    [ValidateScript ( { Test-Path $_ } ) ]
    [string]   $Location = "C:\Windows\Temp",
    [string]   $Hostname = $env:COMPUTERNAME,
    [string[]] $Tags
)
begin{
    $MSI = "$location\ddog.msi"
    If ( Test-path $MSI ) {
        Remove-Item $MSI -Force
    }
}
process{

Write-Output "Getting versions JSON"
$InstallerJsonUrl ="https://s3.amazonaws.com/ddagent-windows-stable/installers.json"
$Req = Invoke-WebRequest -Uri $InstallerJsonUrl

Write-Output "Calculating latest version"
$VersionsObject = $Req.Content | ConvertFrom-Json
$VersionStrings = $VersionsObject| Get-Member -MemberType NoteProperty | Select Name 

$Versions = @()
ForEach ($Version in $VersionStrings){
    $Versions += [version] $Version.Name
}

$LatestVersion = $Versions | Sort-Object -Descending | Select -First 1
Write-Output "Collecting Datadog Version $($LatestVersion.ToString())"
$TargetMSI = $VersionsObject.$($LatestVersion.toString()).amd64

Invoke-WebRequest -Uri $TargetMSI -OutFile $MSI

If ( $Tags ){
    $Expression = "msiexec /qn /i `"$MSI`" APIKEY=`"$APIKEY`" HOSTNAME=`"$HOSTNAME`" TAGS=`"$($TAGS -join ",")`""
}
Else{
    $Expression = "msiexec /qn /i `"$MSI`" APIKEY=`"$APIKEY`" HOSTNAME=`"$HOSTNAME`""
}
Write-Output "Commencing Installation"
Write-Verbose "Installation Command: $Expression"
Invoke-Expression $Expression  

}