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Testing with microservices in merpay
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kazegusuri
April 14, 2018
Programming
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Testing with microservices in merpay
Go Conference 2018 Spring
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April 14, 2018
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Transcript
Go Conference 2018 Spring Masahiro Sano (@kazegusuri) Testing with microservices
in merpay
Agenda • ࣗݾհ • ϝϧϖΠͷܾࡁγεςϜ • ςετϑϨʔϜϫʔΫ • ςετͷछྨ εϥΠυ
Speaker Deck ʹ͋Γ·͢ʂ https://speakerdeck.com/kazegusuri
ࣗݾհ • ࠤ ਖ਼ߒ (@kazegusuri) • Mercari, Inc → Souzoh,
Inc → merpay, Inc • Principal Software Engineer • Backend Engineer • GoͰܾࡁγεςϜશൠΛ։ൃத • ͖ͳ͜ͱ • gRPC
@kazegusuri Go Conference 2016 Spring GRPCͷ࣮ફͱ ݱঢ়Ͱͷརɾܽ
ϝϧΧϦʹ͓͚ΔgRPC • 2015ࠒʹϝϧΧϦͰॳΊͯgRPCΛಋೖ • ͜ΕܾࡁγεςϜͷͨΊͷϚΠΫϩαʔϏεͷҰͭ • ͦͯ͠ϝϧϖΠ
None
None
ϝϧϖΠͷٕज़ελοΫ • Go + gRPC • Microservices Architecture • Kubernetes
(GKE) + (EKS?) • ͦͷଞ • CircleCI, Spinnaker • Stackdriver Logging, Profiler • Datadog (Monitoring, Tracing) • Pagerduty, Sentry
ܾࡁͷٕज़తͳ͠͞ͱָ͠͞ • ܾࡁ͍͠ (ͱݴΘΕΔ) • ܾࡁϓϩόΠμͱͷҰ؏ੑ • ΫϦςΟΧϧ • 0.1%ͷΤοδέʔεΛߟྀͨ͠γεςϜ
• ΤϯδχΞϦϯάͰղܾ
ϚΠΫϩαʔϏεͱҰ؏ੑ • Microservices Architecture is super difficult!! • Monolithic ArchitectureͰτϥϯβΫγϣϯͰ݁
• Microservices ArchitectureͰඞવతʹτϥϯβΫγϣϯ • ݁Ռ߹ੑ • Idempotency • Retry, retry, retry • Async, Message Queue
ϝϧϖΠͷܾࡁγεςϜ • Microservices Architecture • ػೳຖʹϚΠΫϩαʔϏεΛߏங • த֩ͱͳΔܾࡁγεςϜ͕֤ϚΠΫϩαʔϏεͷঢ়ଶΛཧ • ঢ়ଶભҠϞσϧ
• ঢ়ଶ͕֬ఆ͢Δ·ͰແݶʹϦτϥΠ • ͲΜͳλΠϛϯάͰམͪͯ࠶։Մೳ
ϝϧϖΠͷܾࡁγεςϜ Payment Point Sales Microservices Payment Provider 1 2 3
4 Init 1 2 3 4 Fin
Payment Point Sales Microservices Payment Provider 1 2 3 4
Init 1 2 3 4 Fin Keep retrying with delay ϝϧϖΠͷܾࡁγεςϜ
ਓྨ͕ਖ਼࣮͘͢͠Δͷ͍͠
Ͳ͏ͬͯςετ͢Δ͔ • ڞ௨ͷςετϑϨʔϜϫʔΫΛ࡞ • ֤ঢ়ଶຖʹ͋Δ͖ঢ়ଶ(σʔλͷଘࡏɺ)Λఆٛ • ঢ়ଶભҠͤ͞ͳ͕Βঢ়ଶΛ֬ೝ • ࠷ऴతʹΰʔϧ(डཧঢ়ଶ)ʹͳΔ •
͜ͷςετΛਖ਼ৗܥ͚ͩͰͳ༷͘ʑͳҟৗঢ়ଶΛద༻ͯ͠ਖ਼͘͠ಈ࡞͢ Δ͔֬ೝ͢Δ
ςετϑϨʔϜϫʔΫͷαϯϓϧίʔυ
Failure Injection • ֎෦௨৴ʹରͯ͠ҙͷλΠϛϯάͰΤϥʔΛൃੜͤ͞Δ • MySQL • ֎෦αʔϏεͷHTTPϦΫΤετ • ෦αʔϏεͷgRPCϦΫΤετ
• ༷ʑͳΤϥʔύλʔϯͰঢ়ଶભҠ͕ਖ਼͘͠ߦΘΕΔ͔֬ೝ
Failure Injection (MySQL) • ΤϥʔλΠϛϯά • Query • Execͷྃޙ •
Commitͷྃޙ • શͯͷMySQL queryʹରͯ͠hook͢Δ • github.com/shogo82148/go-sql-proxy • ༷ʑͳhook͕ࠐΊͯศར!
Failure Injection (MySQL)
Failure Injection (HTTP) • ΤϥʔλΠϛϯά • HTTPϦΫΤετͷྃޙ • ಛఆͷαʔϏεʹର͢Δ௨৴શͯhook͢Δ •
net/http.RoundTripper ʹΑΔ࣮
Failure Injection (gRPC) • ΤϥʔλΠϛϯά • gRPCϦΫΤετͷྃޙ • ಛఆͷαʔϏεʹର͢Δ௨৴શͯhook͢Δ •
Client InterceptorʹΑΔ࣮ • ·ͩಋೖͰ͖͍ͯͳ͍
Random or Deterministic? • Ͳ͏͍͏݅ͰΤϥʔΛൃੜͤ͞Δ͔ • ΤϥʔΛϥϯμϜͰൃੜͤ͞Δͱςετ͕ෆ҆ఆʹͳΔ • Τϥʔ֬Λ͋͛Δͱޭ͠ͳ͘ͳΓςετ͕࣌ؒ͘ͳΔ •
Τϥʔͷൃੜܾఆతʹߦ͍͍ͨ • stacktrace(runtime.Callers) Ͱܾఆ • Ұൃੜͨ͠ύεͰ2ͱൃੜͤ͞ͳ͍
αʔϏεͷϦΫΤετͷςετ • ςετͰ֎෦ɾ෦αʔϏεΛ͏ͷ͍͠ • ϩʔΧϧͰͷߏங(docker)ɺσʔλͷॳظԽɺςετؒͷґଘ • Mock୯७ͳUnitςετʹྑ͍ • ϦΫΤετʹର͢ΔϨεϙϯε͕ݻఆ͞Εͨঢ়ଶͰͷϦάϨογϣϯ ςετ
• ༧ଌෆೳͳঢ়ଶͰͷςετ
Fake Implementation • αʔϏεͷ୯७Խ͞Ε࣮ͨ • σʔλϕʔεͳͲʹґଘͤͣʹߴʹಈ࡞ • ϥΠϒϥϦଆͰఏڙ͍ͯ͠Δͷ͋Δ • Google
Cloud Pub/Sub • ༻్ʹΑ༷ͬͯʑͳϨϕϧͰ࡞͢Δ • αʔϏεɺpackage, interface
Google Cloud Pub/Sub ͷ Fake
Conformance Test for Fake • FakeͷৼΔ͍͕ຊདྷͷ࣮ͱဃ͍ͯ͠ͳ͍͔ • ظ͢ΔৼΔ͍Λςετέʔεʹ͢Δ • ຊདྷͷ࣮ͱFakeͷ྆ํʹର࣮ͯ͠ߦ
None
ςετͷछྨ • Unit Test / Integration Test • E2E Test
• Chaos Test • QA
Unit and Integration Test • packageͰߦ͏ςετ • ݫີͳ୯ମςετʹ͍ͯ͠ͳ͍ • ԼҐϨΠϠ·ͰؚΊͨςετ
• ґଘinterfaceશͯΠϯδΣΫγϣϯ͢Δ • ґଘαʔϏεͷଓFakeΛར༻ • σʔλϕʔεͷڞ༗͕
σʔλϕʔεͷςετؒͷಠཱੑ • ֤ςετͰDB·Ͱଓ͢ΔͱpackageؒͷςετͰ่յ͢Δ͜ͱ͕ଟʑ • DB͕ڞ༗͞Ε͍ͯΔ͜ͱ͕ • ͳΒDBΛςετຖʹཱͯΕྑ͍ʂ • TestMainͰpackageຖʹಠཱͨ͠databaseΛ࡞(instanceͰͳ͍) •
1ϑΝΠϧʹ·ͱΊͨschemaΛ༻ҙ • multiStatements=trueʹ͢ΔͱExecͰෳΫΤϦΛ·Δ͝ͱ͛ΒΕΔ • ࡞ʹ͔͔Δ࣌ؒ1ඵ΄Ͳ
E2E Test • ࣮ࡍʹαʔόΛىಈͯ͠ϦΫΤετΛ͛ͯৼΔ͍Λςετ • ՄೳͳݶΓґଘαʔϏεىಈ͢Δ • docker-composeͰڥߏங • ςετؒͷಠཱੑςετηοτຖʹಠཱͨ͠σʔλΛ࡞Δ
• ͜͜·ͩਏ͍ͱ͜Ζ͕ଟ͍ • E2EςετͰෳࡶͳςετΛ࣮ࢪ • ಉ࣌ϦΫΤετڝ߹͢ΔΑ͏ͳϦΫΤετ
Chaos Test (Trying) • github.com/Shopify/toxiproxy • framework for simulating network
conditions • Ԇͤͨ͞ΓଳҬ੍ݶͨ͠Γམͱͨ͠ΓͰ͖Δ • gRPCͩͱ͍Ͳ͜Ζ͕͍͠ • ࠓͷͱ͜ΖԆΛൃੜͤͯ͞ݱ࣮తͳϦΫΤετͷϨΠςϯγͷ ༧ଌʹར༻
QA (Quality Assurance) • PostmanΛͬͨAPIςετ • JSONͰϦΫΤετ͢ΔͨΊʹgrpc-gatewayΛར༻ • PostmanͷςετέʔεGitHubͰཧͯ͠CI •
QAͷਓ͕ࣗߦ͍ͬͯΔ!
·ͱΊ • ϚΠΫϩαʔϏε͍͠ • ςετϑϨʔϜϫʔΫͰςετ߲ͷύλʔϯԽ • Failure Injection TestͰΤοδέʔεͷόάݟ͚ͭ͘͢ •
MockΑΓFake
We’re Hiring! https://www.merpay.com/jp/careers/index.html