From Svendsen Tech PowerShell Wiki

To test PowerShell remoting, introduced in PowerShell version 2, you can use the method described in Lee Holmes' article here. For large-scale testing of remoting against possibly thousands of computers in an enterprise, I use the same method, wrapped in a script that uses runspaces for concurrency. The runspace model was borrowed from Zachary Loeber (thanks to both).

Should work with PowerShell versions 2 and up (tested with: 2, 3, 4).

The end result should be a pretty awesome enterprise PowerShell remoting test tool. I have used it against close to 4000 servers in one go, and it performed admirably. It should process a few hundred servers (100-500?) per minute normally. Beware of periodically potentially high CPU usage on the server that runs the script - multiple cores recommended.

I thought about enforcing order of properties, but it's just three simple properties, so I might put it off for a good while. The properties returned are ComputerName (string), Success ($true if it worked, $null on error, should have made it a bool), and Error (string). Happy Select-Objecting for output order.

Here it is running in my lab environment:





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Earlier versions (if any): File:Test-PSRemoting.ps1.txt

Usage

Process the results. You need PowerShell v3 or up to use -WarningVariable.

Look at everything in Out-GridView (ogv):

Parameters

ComputerName Target computers. PromptForCredentials Prompt for alternate credentials (also see -Credential) Credential Supply a PSCredential object with alternate credentials. ThrottleLimit Number of concurrent runspaces. HideProgress Do not display progress bar using Write-Progress. Timeout Individual runspace timeout in seconds. Default: 30. Quiet Do not display end summary with start and end time using Write-Host.

Code

<# .SYNOPSIS Check remote target computers for PowerShell remoting capabilities. Uses runspaces for concurrency. Copyright (C) 2015, Svendsen Tech All rights reserved. Author: Joakim Borger Svendsen .EXAMPLE .\Test-PSRemoting.ps1 -ComputerName $Servers -Credential $mycred .EXAMPLE .\Test-PSRemoting.ps1 -ComputerName $Servers | Format-Table -AutoSize .EXAMPLE $Results = .\Test-PSRemoting.ps1 -ComputerName $Servers #> [CmdletBinding()] param( # Target computer names. [Parameter(ValueFromPipeline=$true, ValueFromPipelineByPropertyName=$true, Mandatory=$true)][Alias('Cn', 'Hostname', 'PSComputerName')] [string[]] $ComputerName, # Prompt for credentials to be used when connecting. [switch] $PromptForCredentials, # Supply PSCredentials object to be used when connecting. [System.Management.Automation.Credential()] $Credential = [System.Management.Automation.PSCredential]::Empty, # Number of simultaneously running threads. [int] $ThrottleLimit = 32, # Do not display progress using Write-Progress. [switch] $HideProgress, # Timeout in seconds. [int] $Timeout = 30, # Don't display end summary showing start and end time using Write-Host. [switch] $Quiet ) begin { $MyEAP = 'Stop' $ErrorActionPreference = $MyEAP $StartTime = Get-Date if ($PromptForCredentials) { $Credential = Get-Credential } $RunspaceTimers = [HashTable]::Synchronized(@{}) $Runspaces = New-Object -TypeName System.Collections.ArrayList $RunspaceCounter = 0 Write-Verbose -Message 'Creating initial session state.' $ISS = [System.Management.Automation.Runspaces.InitialSessionState]::CreateDefault() $ISS.Variables.Add((New-Object -TypeName System.Management.Automation.Runspaces.SessionStateVariableEntry -ArgumentList 'RunspaceTimers', (Get-Variable -Name 'RunspaceTimers' -ValueOnly), '')) Write-Verbose -Message 'Creating runspace pool.' $RunspacePool = [System.Management.Automation.Runspaces.RunspaceFactory]::CreateRunspacePool(1, $ThrottleLimit, $ISS, $Host) $RunspacePool.ApartmentState = 'STA' $RunspacePool.Open() # This is the script block that is run for each computer. $ScriptBlock = { [CmdletBinding()] param( [string] $Computer, [int] $ID, $Credential ) # Get the start time. $RunspaceTimers.$ID = Get-Date # The objects returned here are passed to the host... if (-not (Test-Connection $Computer -Count 1 -Quiet)) { New-Object psobject -Property @{ ComputerName = $Computer Success = $null Error = 'No ping reply' } continue } $IcmHash = @{ ErrorAction = 'Stop' ComputerName = $Computer ScriptBlock = { 'It works' } } if ($Credential.Username -ne $null) { $IcmHash.Credential = $Credential } try { $Result = Invoke-Command @IcmHash } catch { New-Object psobject -Property @{ ComputerName = $Computer Success = $null Error = $_ } continue } # Check if results are as expected. if ($Result -ne 'It works') { New-Object psobject -Property @{ ComputerName = $Computer Success = $null Error = 'Unknown error' } continue } # Everything went well, return success object. New-Object psobject -Property @{ ComputerName = $Computer Success = $true Error = $null } } # end of script block function Get-PSRemotingResult { [CmdletBinding()] param( [switch]$Wait ) do { $More = $false foreach ($Runspace in $Runspaces) { $StartTime = $RunspaceTimers[$Runspace.ID] if ($Runspace.Handle.IsCompleted) { Write-Verbose -Message ('Thread done for {0}' -f $Runspace.IObject) $Runspace.PowerShell.EndInvoke($Runspace.Handle) $Runspace.PowerShell.Dispose() $Runspace.PowerShell = $null $Runspace.Handle = $null } elseif ($Runspace.Handle -ne $null) { $More = $true } if ($Timeout -and $StartTime) { if ((New-TimeSpan -Start $StartTime).TotalSeconds -ge $Timeout -and $Runspace.PowerShell) { Write-Warning -Message ('Timeout {0}' -f $Runspace.IObject) $Runspace.PowerShell.Dispose() $Runspace.PowerShell = $null $Runspace.Handle = $null } } } if ($More -and $PSBoundParameters['Wait']) { Start-Sleep -Milliseconds 100 } foreach ($Thread in $Runspaces.Clone()) { if (-not $Thread.Handle) { Write-Verbose -Message ('Removing {0} from runspaces' -f $Thread.IObject) $Runspaces.Remove($Thread) } } if (-not $HideProgress) { $ProgressSplatting = @{ Activity = 'Testing PSRemoting capabilities' Status = 'Processing: {0} of {1} total threads done' -f ($RunspaceCounter - $Runspaces.Count), $RunspaceCounter PercentComplete = ($RunspaceCounter - $Runspaces.Count) / $RunspaceCounter * 100 } Write-Progress @ProgressSplatting } } while ($More -and $PSBoundParameters['Wait']) } # end of Get-PSRemotingResult } # end of begin block process { foreach ($Computer in $ComputerName) { $RunspaceCounter++ $psCMD = [System.Management.Automation.PowerShell]::Create().AddScript($ScriptBlock) [void] $psCMD.AddParameter('ID', $RunspaceCounter) [void] $psCMD.AddParameter('Computer', $Computer) [void] $psCMD.AddParameter('Credential', $Credential) [void] $psCMD.AddParameter('Verbose', $VerbosePreference) $psCMD.RunspacePool = $RunspacePool Write-Verbose -Message "Testing PSRemoting capabilities: Checking $Computer" [void]$Runspaces.Add(@{ Handle = $psCMD.BeginInvoke() PowerShell = $psCMD IObject = $Computer ID = $RunspaceCounter }) Get-PSRemotingResult } } end { Get-PSRemotingResult -Wait if (-not $HideProgress) { Write-Progress -Activity 'Testing PSRemoting capabilities' -Status 'Done' -Completed } Write-Verbose -Message 'Closing runspace pool.' $RunspacePool.Close() $RunspacePool.Dispose() if (-not $Quiet) { Write-Host -ForegroundColor Green ('Start time: ' + $StartTime) Write-Host -ForegroundColor Green ('End time: ' + (Get-Date)) } }