From 1 to 20 millions users, the technical story of BlaBlaCar.

Talk given with Benjamin De Bernardi aka Junior (@Genes0r) during PHPCon PL 2015

Transcript

1. View Slide

2. @odolbeau
   Web Architect
   Olivier Dolbeau
   

   View Slide

3. @Genes0r
   Web Developer
   Benjamin De Bernardi
   

   View Slide

4. Leader ride-sharing service.
   Our goal is to become the 1st travel platform.
   30€ 30€
   30€ 30€
   

   View Slide

5. v1.0
   2005-2006
   

   View Slide

6. The prototype
   

   View Slide

7. Let the journey begins!
   

   View Slide

8. V2 (2008)
   

   View Slide

9. 2010
   Start opening new countries.
   2011 2012
   

   View Slide

10. 1 million members.
    

    View Slide

11. View Slide

12. Plain (old) PHP
    

    View Slide

13. Homemade
    framework
    

    View Slide

14. lib.trip.php
    3770 lines of code
    69 functions
    926 lines for the longest one.
    

    View Slide

15. NOT TESTED
    

    View Slide

16. View Slide

17. View Slide

18. Huge community.
    

    View Slide

19. Attract new people.
    

    View Slide

20. View Slide

21. V3
    

    View Slide

22. Lot of new tools.
    

    View Slide

23. View Slide

24. View Slide

25. View Slide

26. elasticsearch
    ● Scalable
    ● aggregations
    ● geo type index
    

    View Slide

27. View Slide

28. Asynchronous jobs everywhere.
    ● performance
    ● separation of concern
    

    View Slide

29. 129 workers.
    mail
    sms
    publication
    push
    indexation
    image
    resizing
    alerts
    profile
    completion
    We love
    workers!
    

    View Slide

30. 30% HIT/MISS
    “Firemode” to handle
    high traffic
    Reverse proxy
    

    View Slide

31. View Slide

32. View Slide

33. View Slide

34. View Slide

35. View Slide

36. In the meantime...
    

    View Slide

37. 2012 2013 2014 2015
    Still opening new countries.
    

    View Slide

38. Under the hood
    

    View Slide

39. Symfony Upgrades
    Started with SF2 2.0
    Upgrade as soon as we can
    Remove deprecated code
    Follow best practices
    2.0 → 2.7
    

    View Slide

40. Configuration
    1 conf file for each country
    100+ configuration keys
    Fallback on default
    Inheritance for localized websites
    Toggling of features
    

    View Slide

41. Configuration
    

    View Slide

42. Configuration
    

    View Slide

43. Dynamic Features
    On the fly changes
    Multiple environnements
    Wide range of filters
    API
    Open source (Github)
    

    View Slide

44. Dynamic Features
    

    View Slide

45. ● Awesome new technos
    ● Awesome v3
    ● Awesome new countries.
    Job done?
    

    View Slide

46. 406 187
    NLOC
    There are “only” 268 041 NLOC for symfony/symfony
    

    View Slide

47. 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)
    

    View Slide

48. ~ 75
    contributors
    There are 1 193 contributors for symfony/symfony
    

    View Slide

49. ~ 30
    minutes to run all the unit tests
    

    View Slide

50. ~ 30
    minutes to deploy the application
    

    View Slide

51. What else ?
    ● Long learning curve
    ● Too many side effects
    ● Time consuming
    ● Big maintenance
    ● Spaghetti code
    

    View Slide

52. MICRO-SERVICES
    

    View Slide

53. Users, ratings, notifications, ridemap...
    MICRO-SERVICES
    

    View Slide

54. MICRO-SERVICES
    

    View Slide

55. MICRO-SERVICES
    

    View Slide

56. NO API!
    

    View Slide

57. The gateway
    

    View Slide

58. The gateway
    ❖ It’s code
    ❖ It uses DDD
    ❖ Everyone love it
    ❖ It’s very well organized
    ❖ There’s a lot of (very) strict rules
    ❖ It separates business logic & data access
    ❖ It’s a vendor ! Easy to use everywhere
    

    View Slide

59. How to: Get a rating
    

    View Slide

60. Business
    

    View Slide

61. A Web Service Like Conversation
    

    View Slide

62. Data
    

    View Slide

63. ● Cache ready
    ● Backend agnostic
    

    View Slide

64. ● Cache ready
    ● Backend agnostic
    Encapsulation !
    

    View Slide

65. DBALStorage is able to contain a
    RedisStorage
    Encapsulation !
    

    View Slide

66. Gateway
    The gateway
    ● Flexible
    ● Easy to test
    ● Deployed when needed
    ● Used for all new projects
    

    View Slide

67. V3
    Previous ecosystem
    

    View Slide

68. Gateway
    V3
    W
    W
    W
    W
    W
    C W
    C
    C
    C
    W
    Current ecosystem
    W
    ● 90 workers
    ● 40 commands
    

    View Slide

69. V3
    W
    W
    W
    W
    W
    C
    W
    C
    C
    C
    W
    Future ecosystem?
    W
    Gateway
    Gateway
    Gateway
    

    View Slide

70. V3
    W
    W
    W
    W
    W
    C
    W
    C
    C
    C
    W
    Future ecosystem?
    W
    B
    B
    B B
    B
    B
    D
    D
    D
    

    View Slide

71. We moved from an
    homemade framework
    to a monolith.
    We want to move from
    this monolith to
    microservices.
    

    View Slide

72. Keep growing!
    Simpler with several small applications?
    

    View Slide

73. ● Fail, learn, succeed!
    ● Microservices FTW!
    ● Be worldwide!
    Benjamin De
    Bernardi
    @Genes0r
    Olivier Dolbeau
    @odolbeau
    We’re hiring!
    In Paris & Warsaw!
    http://blbl.cr/dreamjobs
    

    View Slide