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

2. @odolbeau Web Architect Olivier Dolbeau
3. @Genes0r Web Developer Benjamin De Bernardi
4. Leader ride-sharing service. Our goal is to become the 1st travel platform. 30€ 30€ 30€ 30€
5. v1.0 2005-2006
6. The prototype
7. Let the journey begins!
8. V2 (2008)
9. 2010 Start opening new countries. 2011 2012
10. 1 million members.
12. Plain (old) PHP
13. Homemade framework
14. lib.trip.php 3770 lines of code 69 functions 926 lines for the longest one.
15. NOT TESTED
18. Huge community.
19. Attract new people.
21. V3
22. Lot of new tools.
26. elasticsearch • Scalable • aggregations • geo type index
28. Asynchronous jobs everywhere. • performance • separation of concern
29. 129 workers. mail sms publication push indexation image resizing alerts profile completion We love workers!
30. 30% HIT/MISS “Firemode” to handle high traffic Reverse proxy
36. In the meantime...
37. 2012 2013 2014 2015 Still opening new countries.
38. Under the hood
39. Symfony Upgrades Started with SF2 2.0 Upgrade as soon as we can Remove deprecated code Follow best practices 2.0 → 2.7
40. Configuration 1 conf file for each country 100+ configuration keys Fallback on default Inheritance for localized websites Toggling of features
41. Configuration
42. Configuration
43. Dynamic Features On the fly changes Multiple environnements Wide range of filters API Open source (Github)
44. Dynamic Features
45. • Awesome new technos • Awesome v3 • Awesome new countries. Job done?
46. 406 187 NLOC There are “only” 268 041 NLOC for symfony/symfony
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)
48. ~ 75 contributors There are 1 193 contributors for symfony/symfony
49. ~ 30 minutes to run all the unit tests
50. ~ 30 minutes to deploy the application
51. What else ? • Long learning curve • Too many side effects • Time consuming • Big maintenance • Spaghetti code
52. MICRO-SERVICES
53. Users, ratings, notifications, ridemap... MICRO-SERVICES
54. MICRO-SERVICES
55. MICRO-SERVICES
56. NO API!
57. The gateway
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
59. How to: Get a rating
60. Business
61. A Web Service Like Conversation
62. Data
63. • Cache ready • Backend agnostic
64. • Cache ready • Backend agnostic Encapsulation !
65. DBALStorage is able to contain a RedisStorage Encapsulation !
66. Gateway The gateway • Flexible • Easy to test • Deployed when needed • Used for all new projects
67. V3 Previous ecosystem
68. Gateway V3 W W W W W C W C C C W Current ecosystem W • 90 workers • 40 commands
69. V3 W W W W W C W C C C W Future ecosystem? W Gateway Gateway Gateway
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
71. We moved from an homemade framework to a monolith. We want to move from this monolith to microservices.
72. Keep growing! Simpler with several small applications?
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