Continuous Delivery in Java - Things we learned hurting ourselves

The slides of my talk at the Italian Agile Day 2015 about Continuous Delivery in Java

Transcript

1. Continuous
   Delivery
   in Java
   Cose che abbiamo imparato
   facendoci del male
   Italian Agile Day ‘15
   

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2. @pdincau
   Here I am
   

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3. Continuous Delivery?
   What is
   

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4. “Continuous Delivery is a software development discipline where you
   build software in such a way that the software can be released to
   production at any time. ”
   Martin Fowler*
   * martinfowler.com/bliki/ContinuousDelivery.html
   

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5. “Continuous Delivery is nothing more than reducing the
   stress you get when you deliver business value to the customer ”
   My Team*
   * Come and ask!
   

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6. n t
   Continuous Delivery...
   What is
   

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7. Continuous Integration
   

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8. Continuous Deployment
   

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9. “Safety" Deploy rules
   

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10. Technically
    Speaking
    

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11. Deploy any specific working version to
    production with confidence
    

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12. 3 ways
    

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13. Rodeo Style
    

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14. No tests
    Manual deploy
    Snowflake environments
    Non predictable outcome
    Few or very little collaboration
    

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15. By the book
    

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16. Fast Feedback
    Done is released
    Shared responsibility
    Everything is automated
    Repeatable and reliable process
    

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17. Start small and iterate
    

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18. Once upon
    a time...
    

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19. We did know...
    

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20. Previous deployment process was painful
    Database continuously change
    Different environments
    

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21. Iteration n.1
    No
    Automation
    

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22. Environment replica on AWS
    Manual build
    Manual DB migrations
    Deploy with scp to remote JBoss
    

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23. It was our
    own choice...
    

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24. ...but we felt like this
    

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25. No automation at all
    When was our last deploy?
    

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26. A taste of
    Automation
    Iteration n.2
    

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27. Set up a basic Jenkins installation
    Test and build triggered on push
    DB migration using Liquibase
    Task to deploy on AWS
    

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28. This worked for a while
    

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29. Errors in MyBatis DB mappers
    Wrong/Missing wirings
    

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30. Yay! Environments are ready!
    

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31. Deploy
    Everywhere
    Iteration n.3
    

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32. New Jenkins job to run IT
    Track slowest tests
    First official deploy an all environments
    

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33. …with different DB drivers !#$?!
    

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34. Duplication
    

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35. Incorrect use of mvn profiles
    N-builds for N-environments
    Long build and deploy time
    

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36. Single
    Artefact
    Iteration n.4
    

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37. Got rid of configurations using JBoss
    *Unique* artefact for all environments
    Deploy version X.Y.Z from Nexus
    

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38. We started getting fast
    

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39. But QA were not so happy
    Branches, branches everywhere!
    

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40. Make
    them happy
    Iteration n.5
    

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41. AWS is for nightly builds
    Tags over branches
    Track deployed version
    

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42. Acceptance tests
    

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43. Explained values and
    motivations to Product Owner
    

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44. Remove Candidate
    Clean Up
    Clean Up
    Meet the pipeline
    Migrate
    Database
    Fetch
    Unit Tests
    Build
    Build
    Slow Tests
    Integration Tests
    Integration
    Deploy
    Publish
    UAT
    QA and Publish
    

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45. Where to go next
    

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46. Parallel builds
    Environments Provisioning
    

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47. Things we would
    change...
    

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48. Pipeline with “placeholders”
    Extract configurations
    Explain at the beginning the values behind
    

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49. Things we would
    do again...
    

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50. Build the pipeline iteratively
    Use of Liquibase
    Share pipeline responsibility
    

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51. Recommended reading
    

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52. That’s all!
    

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53. Thanks
    @pdincau
    

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