Microservices - The Naked Truth Of The Maintainability

Transcript

1. @jkubrynski / kubrynski.com MICROSERVICES THE NAKED TRUTH OF THE MAINTAINABILITY JAKUB KUBRYNSKI jk@devskiller.com / @jkubrynski / kubrynski.com
2. $ WHOAMI DEVSKILLER CO-FOUNDER BOTTEGA TRAINER DEVOXX.PL PROGRAM COMMITTEE MEMBER SPRING CLOUD CONTRACT CO-AUTHOR
3. Prawdziwego programistę poznaje się nie po tym, jak zaczyna, ale jak utrzymuje.
4. HOW MICRO? 100 LOC? 1K LOC? 10K LOC? 100K LOC?
5. 1K LOC AVERAGE ENTERPRISE APP == 500K LOC 1 ENTEPRISE APP == 500 MICROSERVICES
6. BUSINESS ORIENTED FOR TECHNICAL STUFF WE HAVE LIBS
7. AUTONOMY
8. INDEPENDENCE P = P(1) * P(2) * ... * P(N)
9. 99.8 * 99.8 * 99.8 = 99.4
10. 99.9 ^ 10 = 99.0
11. AVAILABILITY VS DOWNTIME 9 9 . 9 9 9 % 35d 4d 8h 50m 5m per year 2.5h 14m 1.5m 8s 0.8s per day
12. DEPTH * * SYNCHRONOUS
13. QUALITY
14. LOOSE COUPLING OVER CANONICAL MODEL
15. AVOID END-TO-END TESTS
16. VERIFY CONTRACTS IF: A == C && B == C THEN: A == B
17. DESIGN FOR FAILURE
18. RETRY
19. CIRCUIT BREAKER KEEP CALM AND FALLBACK
20. FIX AS ASAP AS POSSIBLE
21. PERFORMANCE
22. PERFORMANCE TESTS EXPENSIVE INACCURATE TRICKY
23. PRODUCTION TRAFFIC IS USUALLY ON PRODUCTION
24. MONITORING APPLICATION PERFORMANCE MANAGEMENT
25. ANSCOMBE'S QUARTET
26. PERCENTILES P50, P90, P95, P99
27. P?? P95? P99? P99.5?
28. 10 REQUESTS PER PAGE P90: 100% slow page views P95: 50% slow page views P99: 10% slow page views
29. P99 10 PAGES PER SESSION MEANS 100% FRUSTRATED USERS
30. MONITOR P99.9 OR P99.95
31. AUTOMATION * * AS A CODE
32. PIPELINES AS A CODE
33. INFRASTRUCTURE AS A CODE
34. CONFIGURATION AS A CODE
36. QUESTIONS?
37. THANKS
38. "Have no fear of perfection - you'll never reach it." ― Salvador Dalí