functions/Get-DbaComputerSystem.ps1

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function Get-DbaComputerSystem {
    <#
  .SYNOPSIS
   Gets computer system information from the server.
 
  .DESCRIPTION
   Gets computer system information from the server and returns as an object.
 
  .PARAMETER ComputerName
   Target computer(s). If no computer name is specified, the local computer is targeted
 
  .PARAMETER Credential
   Alternate credential object to use for accessing the target computer(s).
   
  .PARAMETER IncludeAws
   If computer is hosted in AWS Infrastructure as a Service (IaaS), additional information will be included.
 
  .PARAMETER EnableException
   By default, when something goes wrong we try to catch it, interpret it and give you a friendly warning message.
   This avoids overwhelming you with "sea of red" exceptions, but is inconvenient because it basically disables advanced scripting.
   Using this switch turns this "nice by default" feature off and enables you to catch exceptions with your own try/catch.
    
  .NOTES
   Tags: ServerInfo
   Author: Shawn Melton (@wsmelton | http://blog.wsmelton.info)
 
   Website: https: //dbatools.io
   Copyright: (C) Chrissy LeMaire, clemaire@gmail.com
   License: GNU GPL v3 https: //opensource.org/licenses/GPL-3.0
 
  .LINK
   https://dbatools.io/Get-DbaComputerSystem
 
  .EXAMPLE
   Get-DbaComputerSystem
 
   Returns information about the local computer's computer system
 
  .EXAMPLE
   Get-DbaComputerSystem -ComputerName sql2016
 
   Returns information about the sql2016's computer system
 
  .EXAMPLE
   Get-DbaComputerSystem -ComputerName sql2016 -IncludeAws
 
   Returns information about the sql2016's computer system and includes additional properties around the EC2 instance.
 #>

    [CmdletBinding()]
    param (
        [Parameter(ValueFromPipeline = $true)]
        [Alias("cn","host","Server")]
        [DbaInstanceParameter[]]$ComputerName = $env:COMPUTERNAME,
        [PSCredential]$Credential,
        [switch]$IncludeAws,
        [switch][Alias('Silent')]$EnableException
    )
    process {
        foreach ($computer in $ComputerName) {
            Write-Message -Level Verbose -Message "Attempting to connect to $computer"
            $server = Resolve-DbaNetworkName -ComputerName $computer.ComputerName -Credential $Credential

            $computerResolved = $server.FullComputerName

            if (!$computerResolved) {
                Write-Message -Level Warning -Message "Unable to resolve hostname of $computer. Skipping."
                continue
            }

            if (Test-Bound "Credential") {
                $computerSystem = Get-DbaCmObject -ClassName Win32_ComputerSystem -ComputerName $computerResolved -Credential $Credential
            }
            else {
                $computerSystem = Get-DbaCmObject -ClassName Win32_ComputerSystem -ComputerName $computerResolved
            }
            
            $adminPasswordStatus = 
                switch ($computerSystem.AdminPasswordStatus) {
                    0 {"Disabled"}
                    1 {"Enabled"}
                    2 {"Not Implemented"}
                    3 {"Unknown"}
                    default {"Unknown"}
                }

            $domainRole = 
                switch ($computerSystem.DomainRole) {
                    0 {"Standalone Workstation"}
                    1 {"Member Workstation"}
                    2 {"Standalone Server"}
                    3 {"Member Server"}
                    4 {"Backup Domain Controller"}
                    5 {"Primary Domain Controller"}
                }
            
            $isHyperThreading = $false
            if ($computerSystem.NumberOfLogicalProcessors -gt $computerSystem.NumberofProcessors) {
                $isHyperThreading = $true
            }

            if ($IncludeAws) {
                $isAws = Invoke-Command2 -ComputerName $computerResolved -Credential $Credential -ScriptBlock { ((Invoke-WebRequest -TimeoutSec 15 -Uri 'http://169.254.169.254').StatusCode) -eq 200} -Raw
                
                if ($isAws) {
                    $scriptBlock = {
                        [PSCustomObject]@{
                            AmiId = (Invoke-WebRequest -Uri 'http://169.254.169.254/latest/meta-data/ami-id').Content
                            IamRoleArn = ((Invoke-WebRequest -Uri 'http://169.254.169.254/latest/meta-data/iam/info').Content | ConvertFrom-Json).InstanceProfileArn
                            InstanceId = (Invoke-WebRequest -Uri 'http://169.254.169.254/latest/meta-data/instance-id').Content
                            InstanceType = (Invoke-WebRequest -Uri 'http://169.254.169.254/latest/meta-data/instance-type').Content
                            AvailabilityZone = (Invoke-WebRequest -Uri 'http://169.254.169.254/latest/meta-data/placement/availability-zone').Content
                            PublicHostname = (Invoke-WebRequest -Uri 'http://169.254.169.254/latest/meta-data/public-hostname').Content
                        }
                    }
                    $awsProps = Invoke-Command2 -ComputerName $computerResolved -Credential $Credential -ScriptBlock $scriptBlock
                }
                else {
                    Write-Message -Level Warning -Message "$computerResolved was not found to be an EC2 instance. Verify http://169.254.169.254 is accessible on the computer."
                }
            }
            $inputObject = [PSCustomObject]@{
                ComputerName            = $computerResolved
                Domain                  = $computerSystem.Domain
                DomainRole              = $domainRole
                Manufacturer            = $computerSystem.Manufacturer
                Model                   = $computerSystem.Model
                SystemFamily            = $computerSystem.SystemFamily
                SystemSkuNumber         = $computerSystem.SystemSKUNumber
                SystemType              = $computerSystem.SystemType
                NumberLogicalProcessors = $computerSystem.NumberOfLogicalProcessors
                NumberProcessors        = $computerSystem.NumberOfProcessors
                IsHyperThreading        = $isHyperThreading
                TotalPhysicalMemory     = [DbaSize]$computerSystem.TotalPhysicalMemory
                IsDaylightSavingsTime   = $computerSystem.EnableDaylightSavingsTime
                DaylightInEffect        = $computerSystem.DaylightInEffect
                DnsHostName             = $computerSystem.DNSHostName
                IsSystemManagedPageFile = $computerSystem.AutomaticManagedPagefile
                AdminPasswordStatus     = $adminPasswordStatus
            }
            if ($IncludeAws -and $isAws) {
                Add-Member -Force -InputObject $inputObject -MemberType NoteProperty -Name AwsAmiId -Value $awsProps.AmiId
                Add-Member -Force -InputObject $inputObject -MemberType NoteProperty -Name AwsIamRoleArn -Value $awsProps.IamRoleArn
                Add-Member -Force -InputObject $inputObject -MemberType NoteProperty -Name AwsEc2InstanceId -Value $awsProps.InstanceId
                Add-Member -Force -InputObject $inputObject -MemberType NoteProperty -Name AwsEc2InstanceType -Value $awsProps.InstanceType
                Add-Member -Force -InputObject $inputObject -MemberType NoteProperty -Name AwsAvailabilityZone -Value $awsProps.AvailabilityZone
                Add-Member -Force -InputObject $inputObject -MemberType NoteProperty -Name AwsPublicHostName -Value $awsProps.PublicHostname
            }
            $excludes = 'SystemSkuNumber','IsDaylightSavingsTime','DaylightInEffect','DnsHostName','AdminPasswordStatus'
            Select-DefaultView -InputObject $inputObject -ExcludeProperty $excludes
        }
    }
}