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Automation with PowerShell

Workflow

Enable long running tasks to execute and pause and restart so you don't have to start again.

  • Tasks for running on multiple devices
  • Asynchronous, restartable, parallelize or interruptive.
  • Tasks on a large scale, in high availability environments requiring throttling and connection pooling.
# Requires PowerShell (Framework not Core) Ctrl + Shift + F8
# Try tyriar.shell-launcher add-in for enabling multiple powershell clients in Visual Code.

Workflow MySmartFlow
{
    Write-Output -InputObject "Welcome.."
    Start-Sleep -Seconds 10
    CheckPoint-Workflow

    Write-Output -InputObject "Working on something.."
    Start-Sleep -Seconds 10
    CheckPoint-Workflow

}

MySmartFlow -AsJob -JobName SmartFlow -PSPersist $true

Suspend-Job SmartFlow
Get-Job SmartFlow
Resume-Job SmartFlow
Receive-Job SmartFlow -Keep
Remove-Job SmartFlow

WorkFlow Guide

  • No Interactive calls can be used
  • "CheckPoint-Workflow" to save progress
  • "parallel {}" syntax for running code blocks in parallel.
  • "sequence {}" can be used within parallel to force blocks to run sequentially.
  • "param([string[]] $computers)" enables parameter injection.
  • Regular methods require "$result = InlineScript { }" syntax.
  • No $global scope

References

PowerShell Master Class - Automation with John Savill

PowerShell Master Class - Git Repo

Getting Started with Windows PowerShell Workflows

Workflows - Everything you need to know