Overcoming the fear of deployments
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Can you release a new version of your product right now? This version includes everything which is under your version control? We don’t have to be hypocrite, answer yes to these two questions is not easy. In this lecture I’m going to talk about my journey in Continuous Delivery where I’ve find the fear as the biggest smell in its adoption.
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Overcoming the fear of deployments
- 1. Overcoming the fear of deployments by @andreitognolo
- 3. As we grow up, we're often encouraged to think of fear as a weakness, just another childish thing to discard (…) Karen Thompson Walker [1]
- 4. Shelly Kagan [2] SOMETHING BAD 3 Conditions
- 5. SOMETHING BAD 3 Conditions NON-NEGLIGIBLE CHANCE 0% 100% Shelly Kagan [2]
- 6. SOMETHING BAD 3 Conditions NON-NEGLIGIBLE CHANCE SOME UNCERTAINTY 0% 100% Shelly Kagan [2]
- 7. SOMETHING BAD 3 Conditions NON-NEGLIGIBLE CHANCE SOME UNCERTAINTY 0% 100% (something that you care) (something unpredictable) Shelly Kagan [2]
- 8. (un)predictability Is it possible to have a completely predictable deployment process?
- 11. Construct a house (un)predictability Cynefin Framework [3] (COMPLICATED) cause and effect requires analysis
- 12. Construct a house Create software (un)predictability (COMPLICATED) (COMPLEX) (*) cause and effect can only be perceived in retrospect, but not in advance cause and effect requires analysis Cynefin Framework [3] (*) Software development is not only made of complex activities
- 13. Construct a house Create software (un)predictability (COMPLICATED) Require tests after! cause and effect can only be perceived in retrospect, but not in advance cause and effect requires analysis Cynefin Framework [3] (*) Software development is not only made of complex activities (COMPLEX) (*)
- 14. (un)predictability Is it possible to have a completely predictable deployment process?
- 15. (un)predictability Is it possible to have a completely predictable deployment process? Not completely predictable
- 16. (un)predictability Is it possible to have a completely predictable deployment process? Not completely predictable Some fear makes sense
- 17. The amount of fear should be appropriate to the size of "the bad" How much fear?
- 21. Worst thing possible deploy new version Make it available (avoiding)
- 22. Worst thing possible deploy new version Make it available smoke test (avoiding)
- 23. A really bad thing run builds
- 24. A really bad thing run builds
- 25. A really bad thing run builds build logs
- 26. A really bad thing run builds build logs tail logs
- 27. A really bad thing TestPyramid Martin Fowler [4] (avoiding)
- 28. You can’t predict everything ps: I don’t like gambling + > 5
- 29. You can’t predict everything ps: I don’t like gambling Are you afraid of betting € 10,000? + > 5
- 30. You can’t predict everything One after the After the first result, you can give up and lose € 1,000 ps: I don’t like gambling (avoiding)
- 31. You can’t predict everything (avoiding)
- 32. You can’t predict everything FEATURE TOGGLE if toggle on { new code } else { old code } (avoiding)
- 33. You can’t predict everything FEATURE TOGGLE (avoiding) if toggle on { new code } else { old code }
- 34. What is the cause? Create software (COMPLEX) cause and effect can only be perceived in retrospect, but not in advance
- 35. What is the cause? 07fc5cb Add ability to ... 1c6a8fb Refactor database 79b83c6 Remove unused ... 657fdea Add migration ... 07537c2 Change signature .. 6b7a12d Improve ajax ... 7bffaa4 Add stylesheet ... ce9676d Add dependency ... cb9b60b Change nginx ... 3311736 Remove duplicated .
- 36. What is the cause? May 2015 [5]
- 37. What is the cause? master my-branch merge deploy
- 38. What is the cause? master deploys (avoiding) TRUNK BASED DEVELOPMENT
- 39. What is the cause? master deploys Feature Toggle (avoiding) TRUNK BASED DEVELOPMENT deployment != release
- 40. What is the cause? 79b83c6 Remove unused ... master (avoiding)
- 41. What is the cause? master deploys If it hurts, do it more often If you are afraid, do it more often (avoiding)
- 42. Culture
- 43. Culture If people are afraid to get blamed, they will usually hide problems, at the risk of creating even bigger problems. Highly unhealthy. Blog post link [6]
- 44. Culture Development Team Operations Team It’s your fault! No, it’s your fault!
- 45. Culture It’s our responsibility! DevOps Culture
- 46. Takeaway List
- 47. Takeaway List
- 48. Don’t be afraid to be afraid :) Takeaway List
- 50. [1] https://www.ted.com/talks/karen_thompson_walker_what_fear_can_teach_us [2] http://oyc.yale.edu/philosophy/phil-176/lecture-22 [3] https://en.wikipedia.org/wiki/Cynefin_Framework [4] http://martinfowler.com/bliki/TestPyramid.html [5] https://www.thoughtworks.com/radar/techniques/long-lived-branches-with-gitflow [6] http://tech.transferwise.com/blameless-postmortems/ References