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?
5. Slicing up a monolithic application Why and how?
6. What is a monolithic application?
7. “It does everything, even coffee” - Every developer ever
8. Website
9. Mobile apps
10. So big!
11. 406 187 NLOC There are “only” 268 041 NLOC for symfony/symfony
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)
13. 75 contributors There are 1 193 contributors for symfony/symfony
14. 20 minutes to deploy the application
15. “Everything should be made as simple as possible but not simpler” Albert Einstein
17. ➚ Pragmatism “Just get it done, ok?” - God
18. ➚ Processes - “Let’s sync!” - “No way man” - A developer and an ops, on a friday evening
19. ➚ Learning “It must be somewhere in that file” - A struggling mentor
20. ➘ Conflicts “I’ve been rebasing for years, kill me now” - A Git enthusiast
21. ➘ Time consuming “The script has been frozen for 30 minutes, should I worry?” - A worried developer
22. ➘ Maintenance “It works, but I can’t figure out why” - Both of us
23. ➘ Lack of expertise “I’ve only been there for 3 years for God’s sake!” - A senior developer
24. ➘ Side effects “The website is broken” - A user on Twitter
25. With minor change comes major bugs.
26. With minor change comes major bugs. Olivier, based on its personal experience.
27. Objectifs BlaBlaCar today.
28. countries NEW IN 2015 India Mexico Hungary Romania Serbia Croatia 19
29. Exponential growth 20 million members in April 2015
30. What are micro- services?
31. Users Ratings Notifications Moderation Trips
32. Objectives - Going worldwide - Fast growing community
33. BlaBlaCar is deploying multiple datacenters.
34. We need to localize our data.
35. Different needs mean different storage.
36. There are only two hard things in Computer Science: cache invalidation and naming things. Phil Carlton
37. The gateway
38. Business Data
39. - How to make it easier for everyone to work together? - How to avoid conflicts? - How to foster expertise?
40. - Micro-startups - Independant teams - Focus on a specific domain - Multi-skills - Limited lifespan Team work
42. - Easy to understand - Fast to test, fast to deploy - Framework - Open-source - No more conflicts
43. - Long to bootstrap - Specific projects to handle configuration - Increases ops complexity
45. Micro services are not a silver bullet!
46. Migrate from monolithic to micro services can be a pain.
47. t is worth it if you need it!
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