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
   

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2. $ WHOAMI
   DEVSKILLER CO-FOUNDER
   BOTTEGA TRAINER
   DEVOXX.PL PROGRAM COMMITTEE MEMBER
   SPRING CLOUD CONTRACT CO-AUTHOR
   

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3. Prawdziwego programistę poznaje się nie po tym, jak zaczyna, ale jak
   utrzymuje.
   

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4. HOW MICRO?
   100 LOC?
   1K LOC?
   10K LOC?
   100K LOC?
   

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5. 1K LOC
   AVERAGE ENTERPRISE APP == 500K LOC
   1 ENTEPRISE APP == 500 MICROSERVICES
   

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6. BUSINESS ORIENTED
   FOR TECHNICAL STUFF WE HAVE LIBS
   

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7. AUTONOMY
   

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8. INDEPENDENCE
   P = P(1) * P(2) * ... * P(N)
   

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9. 99.8 * 99.8 * 99.8 = 99.4
   

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10. 99.9 ^ 10 = 99.0
    

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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
    

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12. DEPTH *
    * SYNCHRONOUS
    

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13. QUALITY
    

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14. LOOSE COUPLING
    OVER
    CANONICAL MODEL
    

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15. AVOID
    END-TO-END TESTS
    

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16. VERIFY CONTRACTS
    IF: A == C && B == C
    THEN: A == B
    

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17. DESIGN FOR FAILURE
    

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18. RETRY
    

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19. CIRCUIT BREAKER
    KEEP CALM AND FALLBACK
    

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20. FIX
    AS ASAP AS POSSIBLE
    

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21. PERFORMANCE
    

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22. PERFORMANCE TESTS
    EXPENSIVE
    INACCURATE
    TRICKY
    

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23. PRODUCTION TRAFFIC
    IS USUALLY ON PRODUCTION
    

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24. MONITORING
    APPLICATION PERFORMANCE MANAGEMENT
    

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25. ANSCOMBE'S QUARTET
    

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26. PERCENTILES
    P50, P90, P95, P99
    

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27. P??
    P95?
    P99?
    P99.5?
    

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28. 10 REQUESTS PER PAGE
    P90: 100% slow page views
    P95: 50% slow page views
    P99: 10% slow page views
    

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29. P99
    10 PAGES PER SESSION
    MEANS 100% FRUSTRATED USERS
    

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30. MONITOR
    P99.9 OR P99.95
    

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31. AUTOMATION *
    * AS A CODE
    

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32. PIPELINES AS A CODE
    

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33. INFRASTRUCTURE AS A CODE
    

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34. CONFIGURATION AS A CODE
    

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36. QUESTIONS?
    

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37. THANKS
    

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38. "Have no fear of perfection - you'll never reach it." ― Salvador Dalí
    

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