Stress-free software releases

Transcript

1. Stress-free software
   releases
   BGPHP 2019, Sofia
   

   View Slide

2. @TsTrv
   CTO Adeva - An Exclusive
   Developers Network
   Fully-distributed network
   Worked with startups and Fortune
   500 companies
   

   View Slide

3. @TsTrv
   Building strong
   engineering
   processes
   

   View Slide

4. @TsTrv
   Nirvana in software
   engineering
   

   View Slide

5. @TsTrv
   State of the application
   ー Legacy, enterprise application built in PHP
   ー Being developed for over 10 years
   ー 0% test coverage
   ー 10 engineers - to keep it alive
   

   View Slide

6. @TsTrv
   The problems
   ー Unable to ship as fast as we needed
   ー Never ending bug fixing cycles
   ー Full-regression testing took 3-4 weeks
   ー Releases once monthly
   ー Scheduled on weekends
   

   View Slide

7. @TsTrv
   Formula for stress and
   burnout
   

   View Slide

8. @TsTrv
   Continuous
   Everything
   

   View Slide

9. @TsTrv
   

   View Slide

10. @TsTrv
    Objections
    ー Complexity
    ー Risk
    ー Control
    ー Habit
    

    View Slide

11. @TsTrv
    Continuous Everything
    

    View Slide

12. @TsTrv
    Continuous Everything… Nirvana
    

    View Slide

13. @TsTrv
    Continuous Everything… Nirvana
    

    View Slide

14. @TsTrv
    Continuous Everything… Nirvana
    

    View Slide

15. @TsTrv
    Continuous Everything
    ー If you fail, you fail small
    ー If something breaks, you know to fix immediately
    ー Fewer bugs
    ー Release new features faster
    ー Reduce Costs
    

    View Slide

16. @TsTrv
    What could
    potentially go
    wrong?
    

    View Slide

17. @TsTrv
    What could
    potentially go
    wrong right?
    

    View Slide

18. @TsTrv
    Legacy code
    ー Strangler Pattern
    ー Branch By Abstraction Technique
    

    View Slide

19. @TsTrv
    Strangler Pattern
    

    View Slide

20. @TsTrv
    Branch By Abstraction
    

    View Slide

21. @TsTrv
    Automated Tests
    

    View Slide

22. @TsTrv
    Automated tests
    ー Assume legacy works flawlessly ?!
    ー Utilize new modules to Increase the code
    coverage
    

    View Slide

23. @TsTrv
    Pipeline
    

    View Slide

24. @TsTrv
    Deployment vs Release
    ー Decoupling
    ー Feature Toggles
    – Dark Launching
    – Phased rollout
    

    View Slide

25. @TsTrv
    

    View Slide

26. @TsTrv
    Deployment Strategy
    ー Blue Green
    ー Canary deployment
    

    View Slide

27. @TsTrv
    Blue Green Deployment
    

    View Slide

28. @TsTrv
    Blue Green Deployment
    

    View Slide

29. @TsTrv
    Canary Deployment
    

    View Slide

30. @TsTrv
    Mindset
    ー Everyone should participate
    ー Not a DevOps work only
    ー Continuous improvement, day by day
    

    View Slide

31. @TsTrv
    Actions
    ー Wrapped up the legacy code
    ー Faked automated tests for the legacy
    ー Identified pipeline
    ー Decoupled releases from deployment
    ー Created a culture of continuous improvement
    

    View Slide

32. @TsTrv
    Wins
    ー Release code to production multiple times daily.
    ー Production bugs lowered by 80%
    ー From bug report to deploy < 30 mins
    ー No more weekends work
    

    View Slide

33. @TsTrv
    Always strive for continuous
    improvement, instead of
    perfection.
    

    View Slide

34. @TsTrv
    Thank you
    

    View Slide