Continuous What?! - Deploying software the right way - Part I

The theoretical part of a two-part presentation given to university students about the process of deploying software.

Transcript

1. Continous what ?
   Deploy software
   in the 21th century
   

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2. Not continuity
   

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3. Not code
   

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4. risk
   

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5. Progress is impossible without change
   - George Bernard Shaw
   

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6. Move fast and break things
   - Mark Zuckerberg
   

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7. break
   Don’t
   sh*t
   

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8. tools
   culture
   

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9. culture
   Let’s talk
   

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10. Source
    Code
    Management
    

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11. The bad
    

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12. The average
    master
    

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13. Feature
    Branches
    master
    add kittens
    

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14. Feature
    Branches
    Rule #1
    master is always
    deployable
    

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15. Feature
    Branches
    Rule #2
    change happens in
    feature branches
    

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16. Pull
    Requests
    

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17. Feature
    Branches
    Rule #3
    small and trackable
    changes
    

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18. Tracking
    Site
    Tracker
    PR #1
    PR #2 PR #3 PR #4
    PR #6
    

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19. Unit
    Tests
    

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20. What is
    the unit
    Test?
    1
    2
    3
    

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21. Unit Testing
    protects
    (t - 1)
    

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22. Feature
    Branches
    Rule #4
    build a reliable
    test suite
    

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23. make them
    fast
    

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24. You always
    test
    

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25. Yes, and
    how ?!
    

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26. Continous Integration
    

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27. Kontinuierliche Integration ist ein Begriff aus der Software-Entwicklung,
    der den Prozess des fortlaufenden Zusammenfügens von
    Komponenten zu einer Anwendung beschreibt. […]
    - Wikipedia
    

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28. code
    

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29. production
    

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30. code
    (compile)
    test
    (staging)
    production
    report
    

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31. tools
    to the rescue
    

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32. python
    fanboy
    

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33. nosetests
    unit-testing
    

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34. nosetests
    unit-testing
    orthogonal
    edge cases
    

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35. selenium
    integration-testing
    

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36. selenium
    why-is-this-not-working-anymore?!
    

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37. sphinx
    documentation
    

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38. featureflags
    I see something you can’t see
    

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39. featureflags
    shiny new
    code
    old
    code
    is a
    developer
    

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40. laboratory
    When old things have to go
    User
    old
    code
    new
    code
    request
    result
    

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41. import laboratory
    experiment = laboratory.Experiment()
    with experiment.control() as c:
    c.record(get_objects_from_database())
    with experiment.candidate() as c:
    c.record(get_objects_from_cache())
    objects = experiment.run()
    laboratory
    When old things have to go
    

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42. fabric
    automate deploys
    

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43. putting it
    together
    

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44. travis-ci.org circleci.com
    

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46. Questions
    m.neidinger@unibas.ch
    @sQu4rks
    

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