Reducing risk with continuous delivery

What is continuous delivery and how does it reduce risk with case studies.

This was a lunch time talk at Pivotal (http://www.meetup.com/Pivotal-Labs-Tech-Talks/)

Transcript

1. Reducing risk with continuous
   delivery
   BY JOEL CHIPPINDALE - NOVEMBER 2014
   

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2. A story about FutureLearn
   

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3. How many of you work in continuous
   delivery environments?
   

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4. How do you explain the benefits?
   

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5. What is continuous delivery?
   

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6. What is continuous deployment?
   

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7. What is deployment?
   

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8. All the work required to make a
   new feature available to users
   

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9. Release based deployment
   

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10. Process
    

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11. Benefits
    • QA have time to check each release
    before it goes live
    • Marketing can announce releases
    • Defined process sounds reliable
    

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12. But what happens when
    something goes wrong?
    

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13. • Bugs found in QA can delay ALL features.
    • Features may miss the ‘release window’
    • How are bugs fixed that are found AFTER QA?
    • Scheduled downtime?
    

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14. Big releases are complicated
    releases
    

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15. The more complicated the release the greater
    the chance that something will go wrong
    

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16. Continuous deployment
    

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17. Process
    

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18. • Bugs found in QA can delay ALL features.
    • Features may miss the ‘release window’
    • How are bugs fixed that are found AFTER QA?
    • Scheduled downtime?
    

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19. Benefits
    • Features and bug fixes available as soon
    as they are ready
    • Most deployments can be made with
    zero downtime
    

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20. Continuous deployment
    vs.
    Continuous delivery
    

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21. Case study 1: Etsy
    

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23. More than 1 billion dollars worth
    of sales made on Etsy in 2012
    Source: Contniuous deployment at Etsy
    

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24. How often do Etsy deploy code?
    

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25. 25+ times per day
    

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26. Who can deploy code at Etsy?
    

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27. EVERYONE
    

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28. Automated tests
    

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29. Fast and easy deployments
    

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30. Constant monitoring
    

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31. Continual bug fixing
    

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32. …and gradual role out of
    features
    

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33. Case study 2: gov.uk
    

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35. 50 million visits a month
    Source: GDS blog
    

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36. Several deployments a day,
    thousands since launch
    

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37. Automated tests
    

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38. Fast and easy deployments
    

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39. Constant monitoring
    

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40. …and smoke tests
    

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41. Case study 3: FutureLearn
    

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43. 700,000 learners
    

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44. Average of 3 deployments every
    working day
    

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45. Automated tests
    

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46. Fast and easy deployments
    

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47. Constant monitoring
    

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48. Continual QA and bug fixing
    

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49. …beyond Etsy, gov.uk and
    FutureLearn
    

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50. Amazon
    

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51. Google
    

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52. Facebook
    

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53. Continuous delivery works well
    with
    

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54. Automated tests
    

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55. Fast and easy deployments
    

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56. Constant monitoring
    

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57. Continual bug fixing
    

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58. These are good practices for
    EVERY project
    

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59. Continuous delivery:
    Reduce risk by delivering small
    changes often and monitoring
    feedback
    

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60. Questions?
    @joelchippindale
    joel.chippindale@futurelearn.com
    about.futurelearn.com/blog/
    

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