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Microservices - The Naked Truth Of The Maintainability
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Jakub Kubryński
April 03, 2017
Programming
1
610
Microservices - The Naked Truth Of The Maintainability
Jakub Kubryński
April 03, 2017
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Transcript
@jkubrynski / kubrynski.com MICROSERVICES THE NAKED TRUTH OF THE MAINTAINABILITY
JAKUB KUBRYNSKI
[email protected]
/ @jkubrynski / kubrynski.com
$ WHOAMI DEVSKILLER CO-FOUNDER BOTTEGA TRAINER DEVOXX.PL PROGRAM COMMITTEE MEMBER
SPRING CLOUD CONTRACT CO-AUTHOR
Prawdziwego programistę poznaje się nie po tym, jak zaczyna, ale
jak utrzymuje.
HOW MICRO? 100 LOC? 1K LOC? 10K LOC? 100K LOC?
1K LOC AVERAGE ENTERPRISE APP == 500K LOC 1 ENTEPRISE
APP == 500 MICROSERVICES
BUSINESS ORIENTED FOR TECHNICAL STUFF WE HAVE LIBS
AUTONOMY
INDEPENDENCE P = P(1) * P(2) * ... * P(N)
99.8 * 99.8 * 99.8 = 99.4
99.9 ^ 10 = 99.0
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
DEPTH * * SYNCHRONOUS
QUALITY
LOOSE COUPLING OVER CANONICAL MODEL
AVOID END-TO-END TESTS
VERIFY CONTRACTS IF: A == C && B == C
THEN: A == B
DESIGN FOR FAILURE
RETRY
CIRCUIT BREAKER KEEP CALM AND FALLBACK
FIX AS ASAP AS POSSIBLE
PERFORMANCE
PERFORMANCE TESTS EXPENSIVE INACCURATE TRICKY
PRODUCTION TRAFFIC IS USUALLY ON PRODUCTION
MONITORING APPLICATION PERFORMANCE MANAGEMENT
ANSCOMBE'S QUARTET
PERCENTILES P50, P90, P95, P99
P?? P95? P99? P99.5?
10 REQUESTS PER PAGE P90: 100% slow page views P95:
50% slow page views P99: 10% slow page views
P99 10 PAGES PER SESSION MEANS 100% FRUSTRATED USERS
MONITOR P99.9 OR P99.95
AUTOMATION * * AS A CODE
PIPELINES AS A CODE
INFRASTRUCTURE AS A CODE
CONFIGURATION AS A CODE
None
QUESTIONS?
THANKS
"Have no fear of perfection - you'll never reach it."
― Salvador Dalí