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Kubernetes (EKS) Ͱߏங͢Δ εέʔϥϒϧͳδϣϒ࣮ߦج൫ Kenta Suzuki (twitter: @kekekenta) CTO, primeNumber inc 2019/8/28 Kubernetes Meetup Tokyo #22
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ࣗݾհ • Kenta Suzuki • twitter: @kekekenta • CTO, primeNumber inc. εϥΠυͷ࠷ޙʹձࣾհࡌͤ·ͨ͠ͷͰɺ͝ڵຯ͋Γ·ͨ͠Βޚཡ͍ͩ͘͞ •ੳج൫ߏஙɾӡ༻ࢧԉSaaSʮtrocco®ʯ
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.Z42- 4 4BMFTGPSDF #JH2VFSZ ੳج൫ߏஙɾӡ༻ σʔλసૹ αϚϦʔςʔϒϧ࡞ σʔλࢹ ֎෦࿈ܞ
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.Z42- 4 4BMFTGPSDF #JH2VFSZ σʔλసૹ αϚϦʔςʔϒϧ࡞ σʔλࢹ ֎෦࿈ܞ ੳج൫ͷߏஙɾӡ༻Λ·ͱΊͯΧόʔ
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troccoͷσʔλసૹδϣϒ • σʔλιʔε • MySQLɺPostgreSQLɺSQLServerͳͲ • εέδϡʔϧ࣮ߦ • ࠷1ִؒ ҙͷσʔλιʔεͷςʔϒϧͷ༰ΛDWHʹసૹ troccoͷσʔλసૹ෦OSSͷembulkΛଟ༻͍ͯ͠·͢ɻ ͜ͷΛआΓͯɺίϛολʔͷํʑɺembulkίϛϡχςΟͷํʑʹײँਃ্͛͠·͢ɻ ࠓޙembulkͷpluginެ։Ͱߩݙ͍ͯ͘͠༧ఆͰ͢ʂ
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troccoͷసૹδϣϒ • δϣϒ࣮ߦ • ʙ10,000/ • δϣϒ͝ͱͷ࣮ߦ࣌ؒ • min: 5s ʙ max: 5h • ࣮ߦ࣌ؒଳ • ࣌ؒʹ1ͷεύΠΫ
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Fan out on ECS چΞʔΩςΫνϟ
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Fan out on ECSαʔϏε SQS εέδϡʔϥʔ 8PSLFS &$4UBTL 8PSLFS &$4UBTL 8PSLFS &$4UBTL ECS ECS NODE δϣϒ polling
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λεΫεέʔϧΞτͷλΠϛϯά͍͠ • SQSͷΩϡʔͷαΠζΛࢹ • CloudwatchϝτϦΫε͕࠷1͝ͱ • εέʔϧ·Ͱɺ1ͨͳ͍ͱߦ͚ͳ͍
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ϗετεέʔϧΞτͷλΠϛϯά͍͠ • λεΫ͕͏ՃͰ্ཱ͕ͪΔϦιʔε͕ ͳ͘ͳͬͨΒεέʔϧ • ىಈͪͷλεΫ͕ग़དྷͨλΠϛϯάͰϗ ετεέʔϧͯ͠΄͍͠ɻɻ
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λεΫεέʔϧΠϯ͍͠ • ECSλεΫΛ҆શʹऴྃͤ͞Δඞཁ͕͋Δ • సૹδϣϒ5hʹٴͿ߹͋Δ • TERMγάφϧͷτϥοϓͯ͠graceful shutdownΛ ࣮ • ͨͩ͠ɺECSͷίϯιʔϧ্ͷ࣮ߦதλεΫҰཡ͔ΒɺTERMΛૹͬͯ͠Β͘͢Δ ͱফ͑ͯ͠·͏
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ϗετͷεέʔϧΠϯ͍͠ • Auto Scaling Group ͷ Life cycle hook ΛͬͯɺΠϯ ελϯεఀࢭલʹDRAININGΛ࣮ࢪ • ىಈதͷλεΫ͕ͳΔ·Ͱࢹ͠ɺͳ͘ͳͬͨΒΠϯε λϯεఀࢭΛ͢͢ΊΔ • લड़ͷ௨ΓɺىಈதͷλεΫҰཡ͔Βফ͑ΔͨΊ͝ʹΐ ͝ʹΐͬͯͨ
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Ϧιʔεׂ • సૹߴԽΦϓγϣϯͱͯ͠ɺCPU/ϝϞϦ্ݶΛઃఆ Ͱ͖ΔΑ͏ʹ͍ͨ͠ • ECSͰλεΫ͝ͱʹϦιʔε্ݶΛઃఆͰ͖Δ͕ɺى ಈ࣌ͷΈ • Ϧιʔε্ݶ͝ͱʹαʔϏεΛ͚Δඞཁ͕͋Γ
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͍͠
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ͦ͜Ͱɺk8s
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k8sͷpodεέδϡʔϥʔʹͭ ͍ͯ
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k8sͷpodεέδϡʔϥʔʹͭ ͍ͯ
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k8sͷpodεέδϡʔϥʔʹͭ ͍ͯ statusͷભҠ "Pending" -> "Running" -> "Succeeded"
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k8sͷpodεέδϡʔϥʔ • nodeϦιʔεͷۭ͖ঢ়گʹԠͯ͡ɺεέδϡʔϥʔ͕ॱ࣍podΛ nodeʹׂΓͯͯ͘ΕΔ • podΛ࡞͓͚ͯ͠ɺ͋ͱ࣮ߦ͞ΕΔͷΛ͚ͭͩ ,VCFSOFUFT QPE /0%& QPE QPE pod্ཱͪ͛ ࣮ߦͪpod create pod
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ͱΓ͋͑ͣࡶʹpodΛcreate͢Ε ɺ͋ͱk8s͕࣮ߦ·Ͱ໘ݟ ͯ͘ΕΔ
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ϊʔυͷεέʔϧΞτ/Πϯ • EKSͷ߹ɺcluster autoscalerΛ͏ͷ͕σϑΝΫτʢͱ ࢥΘΕΔʣ https://github.com/kubernetes/autoscaler/tree/master/ cluster-autoscaler/cloudprovider/aws • podεέδϡʔϦϯάͷঢ়گʹԠͯ͡ɺEC2ϊʔυͷASG ܦ༝ͰεέʔϧΠϯɾΞτΛͬͯ͘ΕΔ
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ϊʔυͷεέʔϧΞτ QPE &$/0%& QPE QPE 1FOEJOH ࠓͷnodeϦιʔεͰɺ podΛ্ཱͪ͛Δ͜ͱ͕ग़དྷͳ͍
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ϊʔυͷεέʔϧΞτ QPE &$/0%& QPE &$/0%& QPE ClusterAutoscaler͕ASGܦ༝ͰnodeΛεέʔϧΞτ
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ϊʔυεέʔϧΠϯ QPE &$/0%& QPE &$/0%& QPE
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ϊʔυεέʔϧΠϯ QPE &$/0%& QPE &$/0%& Ϧιʔεʹ༨༟͕͋Δ
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ϊʔυεέʔϧΠϯ QPE &$4/0%& QPE εέʔϧΠϯ
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1. create pod ࣮ͯ͠ߦΛͭ 2. ඞཁʹԠͯ͡ɺnode͕εέʔϧΞ τ͢ΔͷΛͭ εέʔϥϒϧδϣϒج൫ര
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k8sʹΑΔδϣϒج൫
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ݱࡏͷΞʔΩςΫνϟ SQS εέδϡʔϥʔ 8PSLFS 1PE +PC %JTQBUDIFS Kubernetes δϣϒ create pod schuedule pod &,4/0%& 8PSLFS 1PE $MVTUFS "VUPTDBMFS Scale in/out
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Job Dispatcher SQS εέδϡʔϥʔ 8PSLFS 1PE Kubernetes δϣϒ create pod schuedule pod &,4/0%& 8PSLFS 1PE $MVTUFS "VUPTDBMFS Scale in/out +PC %JTQBUDIFS
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Job Dispatcher ˞ίʔυΠϝʔδͰ͢ • SQS Λ polling • k8s API ʹϦΫΤετΛ͛ɺ pod Λ࡞
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Job Dispatcher ˞ίʔυΠϝʔδͰ͢ LT"1*ʹϦΫΤετ • SQS Λ polling • k8s API ʹϦΫΤετΛ͛ɺ pod Λ࡞
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Job Dispatcher ˞ίʔυΠϝʔδͰ͢ EPDLFSΠϝʔ δͷλάࢦఆ • SQS Λ polling • k8s API ʹϦΫΤετΛ͛ɺ pod Λ࡞
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Job Dispatcher ˞ίʔυΠϝʔδͰ͢ QPEͰ࣮ߦ͢Δ ίϚϯυΛࢦఆ • SQS Λ polling • k8s API ʹϦΫΤετΛ͛ɺ pod Λ࡞
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Job Dispatcher • SQS Λ polling • k8s API ʹϦΫΤετΛ͛ɺ pod Λ࡞ ˞ίʔυΠϝʔδͰ͢ $16ϝϞϦࢦఆ
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Worker pod SQS εέδϡʔϥʔ +PC %JTQBUDIFS Kubernetes δϣϒ create pod schuedule pod &,4/0%& $MVTUFS "VUPTDBMFS Scale in/out 8PSLFS 1PE 8PSLFS 1PE
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Worker pod • ࣮ࡍͷసૹΛ࣮ߦ • సૹ։࢝Ͱ্ཱ͕ͪΓɺసૹ͕ऴྃͨ͠Βpodऴྃ ˞ίʔυΠϝʔδͰ͢
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Cluster autoscaler SQS εέδϡʔϥʔ +PC %JTQBUDIFS Kubernetes δϣϒ create pod schuedule pod &,4/0%& Scale in/out 8PSLFS 1PE 8PSLFS 1PE $MVTUFS "VUPTDBMFS
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Cluster autoscaler ˞ίʔυΠϝʔδͰ͢
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k8sδϣϒج൫ಋೖͷՌ • ѹతίετݮʹޭ • εέʔϧͷλΠϛϯά͕͍͕͍͍͠ ײ͡ʹղܾͰ͖ͨ • cluster autoscaler༷༷ • ։ൃڥͱຊ൪ڥͷಉҰԽ
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ࢹʹ͍ͭͯ • create podͰ͖ͳ͍ • pod͕pendingͷ··্ཱ͕ͪΒͳ͍ • pod͕runningதʹಥવࢮ ຊ൪ӡ༻࣮͕ແ͍ͷͰɺຊʹظ௨Γʹ ಈ͔͘ͱ͍͏ҙຯͰࢹΛ࣮ࢪ
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troccoͷδϣϒεςʔλεભҠ • DB্ʹδϣϒ͝ͱͷεςʔλεΛอ࣋ • dispatcherpodͳͲ͕ͦΕͧΕߋ৽͢Δ RVFVFE TFUUJOH@VQ FYFDVUJOH TVDDFFEFE SQSʹΩϡʔΠϯά create pod ྃ pod্ཱ͕ͪΓ·Γ pod͕࣮ߦத సૹྃ
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redashͰͷࢹ RVFVFE TFUUJOH@VQ FYFDVUJOH TVDDFFEFE ֤εςʔλεͰཹ͍ͯͨ͠ΒΞϥʔτ
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·ͱΊ • γϯϓϧ • k8sͷݞʹΕɺεέʔϥϒϧͳδϣϒج൫ߏஙγϯϓ ϧʹͳΔ • ࢹ • ӡ༻࣮͕ແ͍ͷͰɺͱΓ͋͑ͣऔΕΔσʔλͱ͓ͬͯ͘ • k8sͷҠߦΛৼΓฦͬͯ • όον͔Βk8sಋೖ͢ΔͷׂͱΓ͍͢ͷͰ͓͢͢Ί • কདྷతʹ • কདྷతʹɺϗετͷཧͱ͔Βͳͯ͘ྑ͘ͳΔͱخ͍͠
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͝ਗ਼ௌ ͋Γ͕ͱ͏͍͟͝·ͨ͠ :bow Α͚Εձࣾհޚཡ͍ͩ͘͞
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גࣜձࣾ primeNumber • 201511݄ ઃཱ • ࣾһ9໊ʢ͏ͪΤϯδχΞ8໊ʣ ύʔτφʔΤϯδχΞ30໊Ҏ্ • 201811݄ trocco®ϦϦʔε • 20197݄ γϦʔζAࢿۚௐୡʢ1.3ԯԁʣ࣮ࢪ https://primenumber.co.jp
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ಇ͘ڥ • @தࠇͷԊ͍ • ίΞλΠϜ੍ • 11ʙ15࣌ • िதɺ2·ͰϦϞʔτՄ ※ࢼ༻த • δϜશֹิॿ
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We are hiring • ιϑτΣΞΤϯδχΞ • ΠϯϑϥΤϯδχΞ • ͳͲͳͲɺଟํ໘ઈࢍืूத