PowerShell Automation
PowerShell automation turns repeatable administration into scripts that pass structured objects between commands. It helps operators run the same checked procedure across local machines, remote systems, services, and application programming interfaces.
itWindows and Microsoft infrastructure | OpenSkills.info
Intro
PowerShell Automation
PowerShell automation expresses an administrative procedure as code. A script accepts inputs, calls commands, transforms the objects those commands return, changes a target system, and records an outcome. This replaces a sequence of manual console actions with a procedure that can be reviewed, tested, scheduled, and repeated.
PowerShell combines a command shell, a scripting language, and a .NET-based runtime. Its pipeline passes objects rather than only text. A command can therefore select, sort, group, or act on named properties without first parsing formatted screen output.
The automation path
A useful automation has five parts:
- Trigger — a person, scheduler, CI runner, webhook, or orchestration service starts the script.
- Inputs — parameters, configuration files, environment variables, and secrets supply the values that vary between runs.
- Control logic — functions validate inputs, choose branches, repeat work, and compose commands.
- Targets — cmdlets, modules, REST APIs, native programs, and remote sessions inspect or change systems.
- Outputs — objects, logs, errors, exit codes, and reports tell the caller what happened.
Treat this path as a contract. The trigger supplies valid inputs. The script performs one defined operation. The target returns observable state. The script reports enough information for a person or another system to decide whether the run succeeded.
Continue the course
This section is part of the paid course.
See pricing to subscribe, or log in if you already have access.
Where this skill leads
Relevant careers
See how this topic contributes to broader role-level skill maps.
Sources
- https://learn.microsoft.com/en-us/powershell/scripting/overview
Supports
- PowerShell combines a command shell, scripting language, and automation framework
- PowerShell is cross-platform and works with structured data, APIs, and object models
- Functions, scripts, classes, and modules extend PowerShell
- https://learn.microsoft.com/en-us/powershell/scripting/learn/ps101/04-pipelines
Supports
- PowerShell passes objects through pipelines
- Get-Member exposes object members and Select-Object chooses properties
- Formatting commands are intended for display at the end of a pipeline
- https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_scripts
Supports
- PowerShell script files, parameters, paths, and execution behavior
- https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_functions_advanced
Supports
- CmdletBinding creates cmdlet-like functions with common parameters
- Advanced functions use parameter binding and process blocks
- https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_functions_advanced_parameters
Supports
- Mandatory parameters and validation attributes define input contracts
- https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_error_handling
Supports
- Terminating and non-terminating errors have different control-flow behavior
- ErrorAction Stop can promote non-terminating errors for catch handling
- Unhandled failures should remain visible to callers
- https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_try_catch_finally
Supports
- Try, catch, and finally syntax and cleanup behavior
- https://learn.microsoft.com/en-us/powershell/scripting/learn/deep-dives/everything-about-shouldprocess
Supports
- SupportsShouldProcess and ShouldProcess integrate state-changing functions with WhatIf and Confirm
- Preview support does not provide rollback
- https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_execution_policies
Supports
- Execution policy controls script-loading conditions on Windows
- Execution policy is a safety feature rather than a security boundary
- https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_remote
Supports
- PowerShell runs commands on remote computers through remoting
- Remoting supports persistent sessions and SSH-based connections
- Remote results can be serialized representations of target objects
- https://learn.microsoft.com/en-us/powershell/scripting/security/overview
Supports
- PowerShell security guidance covers credentials, logging, constrained remoting, and injection risks
- https://learn.microsoft.com/en-us/powershell/utility-modules/secretmanagement/overview
Supports
- SecretManagement provides a common interface to registered secret vault extensions
- https://learn.microsoft.com/en-us/powershell/dsc/configurations/configurations
Supports
- Desired State Configuration declares and applies target configuration state
- State-oriented automation compares configuration with desired results
- https://learn.microsoft.com/en-us/azure/architecture/best-practices/retry-service-specific
Supports
- Retries should target transient faults and use bounded policies
- Retry design must consider whether repeating an operation is safe
- https://pester.dev/docs/quick-start/
Supports
- Pester tests PowerShell code and supports mocks
- Pester can produce test and coverage artifacts for CI
- https://learn.microsoft.com/en-us/powershell/utility-modules/psscriptanalyzer/overview
Supports
- PSScriptAnalyzer performs static analysis with built-in and configurable rules
- https://docs.github.com/en/actions/tutorials/build-and-test-code/powershell
Supports
- GitHub Actions can build and test PowerShell projects with Pester
- https://learn.microsoft.com/en-us/powershell/scripting/dev-cross-plat/performance/script-authoring-considerations
Supports
- Official performance considerations for loops, pipelines, and repeated operations
- https://github.com/sindresorhus/awesome
Supports
- The Awesome index identifies the PowerShell ecosystem list
- https://github.com/janikvonrotz/awesome-powershell
Supports
- Discovery of Pester, PSScriptAnalyzer, psake, Invoke-Build, PSFramework, and platyPS as PowerShell ecosystem projects
- https://psake.dev/docs/intro
Supports
- psake defines dependent automation tasks in PowerShell
- https://github.com/nightroman/Invoke-Build
Supports
- Invoke-Build provides PowerShell task automation with dependency relationships
- https://psframework.org/
Supports
- PSFramework supplies logging, configuration, and supporting patterns for PowerShell modules
- https://learn.microsoft.com/en-us/powershell/scripting/developer/help/writing-help-for-powershell-scripts-and-functions
Supports
- PowerShell supports structured help for scripts and functions
- https://learn.microsoft.com/en-us/powershell/scripting/install/powershell-support-lifecycle
Supports
- Release dates for Windows PowerShell 1.0 through 5.1
- Supported PowerShell releases and servicing model
- https://devblogs.microsoft.com/powershell/windows-powershell-is-now-powershell-an-open-source-project-with-linux-support-how-did-we-do-it/
Supports
- PowerShell became open source and added Linux and macOS support in August 2016
- PowerShell Gallery and related projects preceded the open-source runtime
- https://devblogs.microsoft.com/powershell/announcing-powershell-core-6-1/
Supports
- PowerShell Core 6.1 was a supported cross-platform release in September 2018
- PowerShell Core 6.1 expanded Windows module compatibility
- https://devblogs.microsoft.com/powershell/announcing-powershell-7-0/
Supports
- PowerShell 7.0 became generally available in March 2020
- PowerShell 7 improved compatibility while retaining cross-platform operation
- https://devblogs.microsoft.com/powershell/general-availability-of-powershell-7-2/
Supports
- PowerShell 7.2 became generally available as an LTS release in November 2021
- https://devblogs.microsoft.com/powershell/powershell-7-4-general-availability/
Supports
- PowerShell 7.4 became generally available as an LTS release in November 2023
- https://learn.microsoft.com/en-us/azure/automation/overview
Supports
- Azure Automation hosts runbooks, schedules, credentials, and hybrid workers
- https://docs.powershelluniversal.com/
Supports
- PowerShell Universal schedules scripts and exposes PowerShell automation through jobs and endpoints
- https://learn.microsoft.com/en-us/azure/devops/pipelines/tasks/reference/powershell-v2
Supports
- Azure Pipelines runs PowerShell scripts as pipeline tasks
- https://www.jenkins.io/doc/pipeline/steps/workflow-durable-task-step/#powershell-windows-powershell-script
Supports
- Jenkins Pipeline provides PowerShell and pwsh execution steps
- https://docs.ansible.com/ansible/latest/os_guide/windows_usage.html
Supports
- Ansible automates Windows targets and its Windows modules use PowerShell
- https://docs.github.com/en/actions/about-github-actions/understanding-github-actions
Supports
- GitHub Actions supplies repository events, jobs, runners, and workflow logs for automation