TDC 2021 - Better software, faster: Principles of Continuous Delivery and DevOps
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This document discusses principles of Continuous Delivery (CD) and DevOps. It defines CD, Continuous Integration, and Continuous Deployment. The goal of CD is to have software ready for release at any time by building and testing it frequently. CD relies on principles like keeping everything in version control, automating processes, and having all team members share responsibility for software delivery. CD is enabled by practices like uniform build pipelines, test automation, and deploying changes frequently through production-like environments. CD requires a cultural shift and collaboration between development and operations.
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TDC 2021 - Better software, faster: Principles of Continuous Delivery and DevOps
- 1. [email protected] Better software, faster. Principles of Continuous Delivery and DevOps Bert Jan Schrijver @bjschrijver
- 2. Software delivery in the old days…
- 3. Bert Jan Schrijver L e t ’ s m e e t @bjschrijver
- 4. Principles & ingredients of CD CD vs DevOps The goal of Continuous Delivery Definitions Where do I start? CD patterns & anti-patterns Conclusion Outline W h a t ‘ s n e x t ? Why should I do CD? @bjschrijver
- 5. Definitions Every change goes through the build/test pipeline and automatically gets put into production. Continuous Deployment ?! DevOps Building and testing software in such a way that the software can be released to production at any time. "Ship early, ship often, sacrificing features, never quality" - Kyle Neath Continuous Delivery Team members integrate their work frequently. Commits are verified by automated builds and tests. Continuous Integration Who’s who in CI & CD @bjschrijver
- 6. Source: https://i.ytimg.com/vi/64BOxYpVZpU/maxresdefault.jpg YOU KEEP USING THAT WORD I DO NOT THINK IT MEANS WHAT YOU THINK IT MEANS
- 7. Definitions Every change goes through the build/test pipeline and automatically gets put into production. Continuous Deployment Development and operations engineers being responsible together for the entire product lifecycle. DevOps Building and testing software in such a way that the software can be released to production at any time. "Ship early, ship often, sacrificing features, never quality" - Kyle Neath Continuous Delivery Continuous Integration Who’s who in CI & CD @bjschrijver Team members integrate their work frequently. Commits are verified by automated builds and tests.
- 8. How it all started…
- 10. What is the goal of CD?
- 11. a repeatable, reliable process for releasing software What is the goal of CD?
- 12. Principles of Continuous Delivery @bjschrijver Build quality in Keep everything in version control Continuous improvement Automate (almost) everything Everybody is responsible for the delivery process Done means released If it hurts, do it more often
- 13. Ingredients of Continuous Delivery
- 14. Ingredients 03 Build & deploy Information & reporting 05 Design & architecture 02 Culture & organisation 01 Test & verification 04 of Continuous Delivery @bjschrijver
- 15. • Agile software development • Building the right thing • Building the thing right • You build it, you run it • Cross functional teams • Room to experiment, room for failure Culture & organisation
- 16. • Version control • Branching strategy • Database changes • Design for failure • Feature toggles • Automated provisioning Design & architecture
- 17. • Pipeline: An automated sequence of stages to deliver software from version control to your users. • Build pipeline • Deployment pipeline Build & deploy
- 18. • Testing strategy • Test automation • Non functional requirements • Security • Performance • Verify expected business value Test & verification NFR’s: requirements that, when not met, make the system non-functional.
- 19. • Static code analysis • Traceable pipelines • Automatic change logs • Usage metrics • Dynamic dashboards • Data driven decisions, act on metrics • Fix problems before the users notice Information & reporting
- 20. WORKED FINE IN DEV OPS PROBLEM NOW Continuous Delivery vs. DevOps
- 21. DevOps: a definition Development and operations engineers being responsible together for the entire lifecycle of a product.
- 22. : building and running better-quality software more quickly and more reliably. Developers and other IT professionals working together on a shared goal DevOps: another definition
- 23. Why DevOps? as an enabler for Continuous Delivery, faster problem resolution and focus on value instead of problems. DevOps makes your business move faster
- 24. What is DevOps really about?
- 25. DevOps is about culture Source: http://www.azmc.org/wp-content/uploads/2012/11/Arts-and-Culture-Large.jpg
- 26. DevOps is about freedom and responsibility Source: https://images.unsplash.com/photo-1449177009399-be6867ef0505
- 27. DevOps is about empathy Source: http://www.scarymommy.com/wp-content/uploads/2014/06/empathy.jpg
- 28. Continuous Delivery sounds great, but it won’t work here “ ” Photo: Dave Lehl, text source: Jez Humble
- 29. “Continuous Delivery won’t work here” • Stated reasons: • we’re regulated • we’re not building websites • too much legacy • our people are too stupid • Actual reasons: • our culture stinks • our architecture stinks
- 30. Why should I do all this?
- 31. Why CD & DevOps? • Reducing errors • Lowering stress • Empowering teams • Deployment flexibility • Practice makes perfect
- 32. Source: https://7216-presscdn-0-76-pagely.netdna-ssl.com/wp-content/uploads/2011/12/confused-man-single-good-men.jpg Where do I get started?
- 33. …said no product manager ever. J. Paul Reed Let’s spend the next few months.. ..working on automated testing and build/release infrastructure, and redesigning how our application is written. We can postpone our feature development. “ ”
- 34. Take one thing you’re pretty sure you can improve. Start small Tackle the next issue and keep improving! Iterate Approach How to spark change When done, share the results with your team. Celebrate! Show results @bjschrijver
- 35. CD patterns & anti-patterns
- 36. Continuous Delivery without DevOps Anti-pattern Pattern or anti-pattern?
- 37. Uniform build pipelines Anti-pattern Pattern Pattern or anti-pattern?
- 38. Long-running pipelines Anti-pattern Pattern or anti-pattern?
- 39. Obsess on test automation Pattern Pattern or anti-pattern?
- 40. Logging and metrics for ops only Anti-pattern Pattern or anti-pattern?
- 41. Obsess on feedback loops Pattern Pattern or anti-pattern?
- 42. Manual steps in a delivery pipeline Anti-pattern Pattern Pattern or anti-pattern?
- 43. Long living branches Anti-pattern Pattern or anti-pattern?
- 44. Roll-forward only deployments Pattern Pattern or anti-pattern?
- 45. Put everything in version control Pattern Pattern or anti-pattern?
- 46. Lots of small releases Pattern Pattern or anti-pattern?
- 47. TDD is for software, not infrastructure Anti-pattern Pattern or anti-pattern?
- 48. Dev/prod parity Pattern Pattern or anti-pattern?
- 49. Design for failure Pattern Pattern or anti-pattern?
- 50. Tests don’t provide business value Anti-pattern Pattern or anti-pattern?
- 51. Parallelised pipelines Pattern Pattern or anti-pattern?
- 52. Continuous Delivery = Continuous Deployment Anti-pattern Pattern or anti-pattern?
- 53. Separate deployment from release Pattern Pattern or anti-pattern?
- 54. Automate database changes Pattern Pattern or anti-pattern?
- 55. Testing NFR’s in the build pipeline Pattern Pattern or anti-pattern?
- 56. Summary
- 57. What is the goal of a software team?
- 58. Working, useful software, in production.
- 61. Thanks for your time. Got feedback? Tweet it! All pictures belong to their respective authors @bjschrijver