Slicing up a monolithic application Why and how?

Talk given with Benjamin Fraud (@bench1ps) at Paris Web 2015

Transcript

1. Slicing up a monolithic application
   Why and how?
   

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5. Slicing up a monolithic application
   Why and how?
   

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6. What is a monolithic
   application?
   

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7. “It does everything,
   even coffee”
   - Every developer ever
   

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8. Website
   

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9. Mobile apps
   

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10. So big!
    

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11. 406 187
    NLOC
    There are “only” 268 041 NLOC for symfony/symfony
    

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12. 29 582
    Commits
    There are “only” 15 506 commits for symfony/symfony
    There are “only” 10 228 commits for joyent/node
    There are “only” 9 266 commits for twbs/bootstrap
    There are 44 809 commits for rails/rails (but it’s ruby… #troll)
    

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13. 75
    contributors
    There are 1 193 contributors for symfony/symfony
    

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14. 20
    minutes to deploy the application
    

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15. “Everything should be
    made as simple as possible
    but not simpler”
    Albert Einstein
    

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17. ➚ Pragmatism
    “Just get it done,
    ok?”
    - God
    

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18. ➚ Processes
    - “Let’s sync!”
    - “No way man”
    - A developer and an ops, on a friday evening
    

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19. ➚ Learning
    “It must be somewhere in
    that file”
    - A struggling mentor
    

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20. ➘ Conflicts
    “I’ve been rebasing for
    years, kill me now”
    - A Git enthusiast
    

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21. ➘ Time consuming
    “The script has been frozen for
    30 minutes, should I worry?”
    - A worried developer
    

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22. ➘ Maintenance
    “It works, but I can’t
    figure out why”
    - Both of us
    

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23. ➘ Lack of expertise
    “I’ve only been there for
    3 years for God’s sake!”
    - A senior developer
    

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24. ➘ Side effects
    “The website is broken”
    - A user on Twitter
    

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25. With minor change
    comes major bugs.
    

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26. With minor change
    comes major bugs.
    Olivier, based on its personal experience.
    

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27. Objectifs
    BlaBlaCar
    today.
    

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28. countries
    NEW IN
    2015
    India
    Mexico
    Hungary
    Romania
    Serbia
    Croatia
    19
    

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29. Exponential growth
    20 million
    members in April 2015
    

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30. What are micro-
    services?
    

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31. Users
    Ratings
    Notifications
    Moderation
    Trips
    

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32. Objectives
    - Going worldwide
    - Fast growing community
    

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33. BlaBlaCar is
    deploying multiple
    datacenters.
    

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34. We need to
    localize our data.
    

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35. Different needs mean
    different storage.
    

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36. There are only two hard
    things in Computer
    Science: cache
    invalidation and
    naming things.
    Phil Carlton
    

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37. The gateway
    

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38. Business Data
    

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39. - How to make it easier for
    everyone to work together?
    - How to avoid conflicts?
    - How to foster expertise?
    

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40. - Micro-startups
    - Independant teams
    - Focus on a specific domain
    - Multi-skills
    - Limited lifespan
    Team work
    

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42. - Easy to understand
    - Fast to test, fast to deploy
    - Framework
    - Open-source
    - No more conflicts
    

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43. - Long to bootstrap
    - Specific projects to handle
    configuration
    - Increases ops complexity
    

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45. Micro services are not a
    silver bullet!
    

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46. Migrate from monolithic to
    micro services can be a pain.
    

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47. t is worth it if you need it!
    

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48. ● Micro services are not a silver bullet!
    ● Migrate from monolithic to micro services is a pain.
    ● It is worth it if you need it!
    Benjamin Fraud
    @bench1ps
    Olivier Dolbeau
    @odolbeau
    

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