Automation: PowerShell & DSC
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Introduction to PowerShell DSC.
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Automation: PowerShell & DSC
- 1. Automation: PowerShell & DSC Tools for the DevOps toolbox
- 4. Transition to Operations How smooth is your handoff? What does a release look like for you? https://flic.kr/p/6gobfx
- 8. Why do we care? • 2015 State of DevOps survey • Gap • Lead Time – 200x gap • Deployment failures – 60x fewer • Mean Time To Recovery – 168x faster • 2x more likely to exceed profitability, market share, & productivity goals. • 50% higher market cap growth over 3 years.
- 9. Operations is hard(ware) .. and many other things, but let’s talk about hardware. https://flic.kr/p/dZaCMA
- 11. Role based configuration Web Servers SQL Servers Web Services Servers
- 12. App based configuration App 1 App 2 App 3
- 14. Why is this hard? https://flic.kr/p/8tjkup
- 15. What would be better? https://flic.kr/p/nC1mb
- 16. Automation
- 18. What is PowerShell DSC? • Extension to PowerShell language • PS Syntax • Creates configuration scripts • Creates and manages configuration files • Emphasis on servers • Ensures servers are configured the way you need. • “Set it and forget it” • The future of Windows Server Management (and Linux?) https://en.wikipedia.org/wiki/Windows_PowerShell#/media/File:Windows_PowerShell_icon.png
- 19. Where does PS DSC fit in? • Similar to Chef/Puppet • Based on industry standards • Managed Object Format (MOF) • Common Information Model (CIM) https://flic.kr/p/763JUC
- 22. Recap • Implemented as a module Get-Command –Module PSDesiredStateConfiguration • Configuration is in a new command type. • Get-DscResource is your friend • Get-DscResource <name> -syntax is totally sweet
- 23. Contoso University Website Let’s make this a little more real.
- 24. Recap How does this solve the problems we saw earlier? https://flic.kr/p/bpKh74
- 25. Separation of Concerns Dev Test Production Structural Configurations Environment Configuration Data Application Configuration
- 26. Give me more! Write custom DSC resources Pull model Partial Configurations Develop configuration like code (version control, testing) Integration with server deployment process Reporting Works locally too… https://flic.kr/p/cBFFFL
- 27. Questions?
Editor's Notes
- Who are you? Where do you work? What do you do? How do you work? What is your development style? (Agile, traditional, etc.)
- This is a more recent Microsoft graphic on ALM, And I think the differences from the previous slide really show the evolution we’re seeing in the industry. For one thing, it is a cycle, not a line.
- Code is written. Time to get this out into the wild.
- Does your release look like this?
- Fire in the hole?
- Setting up a new server Setting up 10 new servers. 10,000 new servers Different roles require different configurations All machines in the same role should have the exact same configuration. Drift over time Changing requirements “Please install X on all the web servers”
- You know what you want a server to be. You don’t know when it drifts. You don’t know what about it has drifted. You have to write deltas
- Stick with what you know: Describe what you want. Separate the “what” from the “how” Printed directions vs GPS nav.
- Automation.
- Desired State Configuration Describe what you want (Declarative), rather than perform actions to get there (imperative)
- Similar to Chef/Puppet (can be integrated with) Based on industry standards Managed Object Format (MOF) Common Information Model (CIM)