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AWSで始めるServerlessの勘所と始め方
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ryurock
December 20, 2019
Technology
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240
AWSで始めるServerlessの勘所と始め方
Serverless化を初めて最初の一歩でこれ知っておけば良かった。
ってのをまとめてみました。
ryurock
December 20, 2019
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Transcript
AWSͰ࢝ΊΔServerlessͷצ ॴͱ࢝Ίํ 2019.12.19 Eversense co.ltd @ryurock
ΞδΣϯμ 4FSWFSMFTTͱʁ 4FSWFSMFTTͷྫ 4FSWFSMFTTΛ͢Δʹ͋ͨͬͯߟ͑ͳ͍͚ͯ͘ͳ͍ϨΠϠʔ 4FSWFSMFTTͷཧͱݱ࣮
ॳΊͯͷ4FSWFSMFTTͷϙΠϯτ 4FSWFSMFTTͷ࠷ॳͷҰา-BNCEB'VODUJPOT -BNCEB'VODUJPOT 8IZ-BNCEB'VODUJPOT -BNCEB'VODUJPOTΛ͏લʹ͓͖ͬͯ͘ࣄ -BNCEB'VODUJPOTߏύλʔϯ -BNCEB'VODUJPOTΛ͏ʹ͋ͨͬͯͷਆπʔϧ 4FSWFSMFTTͷ࠷ॳͷೋาΊ&$4'BSHBUF &$4'BSHBUF 'BSHBUFͰ͓֮͑ͯ͘ࣄ 'BSHBUFͷҙࣄ߲ 'BSHBUFͷ࠷ॳͷҰา 4FSWFSMFTTͷར %PDLFSࢮͳͳ͔ͬͨ ·ͱΊ
Serverlessͱʁ
Serverlessͱʁ ཚʹݴ͏ͱϏδωεʹؔ ͳ͍γεςϜతͳ੍ޚΛ୭͔ (AWS,Azure,GCP)ʹ͓ͤ ͢Δ͜ͱ
Serverlessͷྫ • େنͳॲཧͷΩϡʔΠϯάॲཧͷ εέʔϧΠϯɾΞτ • EC2ͷηΩϡϦςΟཧΛͤΔ(Ξ ϓϦέʔγϣϯϨΠϠʔҾ͖ଓ͖ ࣗݾཧͰ͢) • ͳͲ
ServerlessΛ͢Δʹ͋ͨͬͯߟ͑ͳ͍͚ͯ͘ͳ͍ϨΠϠʔ • Lambda(FaaS) • ͜ͷαʔϏε͔ΒServerless͕࢝·ͬͨͱݴͬͯաݴͰͳ͍ • ECS • ECS on
EC2 • EKS • ECS on Fargate • ͳͲ Service Layer
ServerlessΛ͢Δʹ͋ͨͬͯߟ͑ͳ͍͚ͯ͘ͳ͍ϨΠϠʔ ίϯςφɾLambdaͱʹشൃੑͷ͋ΔαʔϏεͳͷͰ(్தͰλεΫ ͕ఀࢭͨ͠߹్தܦաͷStorageσʔλجຊഁغ͞ΕΔ)Storage ͷαʔϏεΛ༻͢Δ Storage Layer • CloudWatchLogs • LambdaɾFargateͱʹσϑΥϧτͷϩάCWLogsʹ
ग़ྗ͞ΕΔ • S3 • EC2ͰFileग़ྗ͍ͨ͠߹ͦΕΛS3ʹอଘ͢Δ • ͨͩ͠ϦΞϧλΠϜIO͕͍ͷͰۤख
ServerlessΛ͢Δʹ͋ͨͬͯߟ͑ͳ͍͚ͯ͘ͳ͍ϨΠϠʔ લड़ͨ͠Storage୯ମͰద༻ͷ߹ڞʹεϧʔϓοτڐ༰͕͍ͷ ͰWEBαʔϏεେ༰ྔόονͷ߹୯ମͰ༻ͮ͠Β͍ͷ ͰσʔλΛసૹ͢ΔαʔϏεΛதؒʹஔ͘ඞཁ͕͋Δ Transform Layer • Kinesis FireHose •
ϦΞϧλΠϜ͚ϚωʔδυFluentdͱ͓΅͓͍͑ͯͯେମେৎ • Firelens • ίϯςφͷσʔλΛసૹ͢ΔͨΊͷSideCar Container • Re:event2019ͰFargateͷσϑΥϧτϩάʹՃ͞Εͨ • AWS͕ఏڙ͢ΔAWS͚ʹ࠷దԽͨ͠Fluentd
ServerlessΛ͢Δʹ͋ͨͬͯߟ͑ͳ͍͚ͯ͘ͳ͍ϨΠϠʔ େ͖͚ͯ͘ * BatchͰ࣮ߦ͢Δpullܗࣜ * σʔλ͕อଘ͞ΕͨλΠϛϯάͰىಈͤ͞ΔEventυϦϒϯܗࣜ * Ұൠతͳઆ໌Ͱͳ͍ͱࢥ͏͚ͲELBͷHTTP Request͔ΒͷEvent͕͍ͬͯΔͱߟ͑ͯྑ͍ Event
Layer • CloudWatch Events • ϦΞϧλΠϜ͚ϚωʔδυFluentdͱ͓΅͓͍͑ͯͯେମେৎ • ELB • HTTP Request͔ΒLambdaίϯςφʹΠϕϯτΛ͢ • SNS • TopicsΛൃߦ͢Δ͜ͱʹΑͬͯLambdaSQSΛൃߦͰ͖Δ
͜Μͳײ͡
Serverlessͷཧͱݱ࣮ ୯Ұ͕໌֬ͳͷͰෳࡶͳࣄΛ͠Α͏ͱ͢Δ ͱͦΕͳΓʹ৭ʑͳαʔϏεͱ࿈ܞ͠ͳͯ͘ ͳΒͳ͍ ʲॏཁʳ ϨΠϠʔΛ͑Δ࣌ʹ CloudServiceͱ͖߹͏֮ޛ͕ ඞཁ
ॳΊͯͷServerlessͷϙΠϯτ ϨΠϠʔΛ͑ͳ͍খ͞ͳͷ ͔ΒॳΊͯ࿅Λ্͍͛ͯ͘ • ϨΠϠʔ͕͑ͳ͍ͷͰখ͞ͳόονͱ͔͔Β࢝Ί Δͱྑ͍ • Lambda͔Β͕͓͢͢Ί • ྫ͕ଟ͘ൺֱతރΕ͍ͯΔ
Serverlessͷ࠷ॳͷҰา Lambda Functions
Lambda Functions ίϯςφ͏લʹLambdaͰ Ͱ͖ͳ͍͔ߟ͑Α͏ (ίϯςφઃఆ͕৭ʑ͍͠)
Why Lambda Functions? • Ұ൪ϑϧϚωʔδυServerless • ࿈ܞॲཧ(S3,CloudWatch Logs,SQS)͕ ஈʑͱ૿͍͍͑ͯͯউख͕Α͍ •
খ࢝͘͞ΊΔࣄ͕Ͱ͖Δ • eg. S3ʹImage͕Ξοϓϩʔυ͞ΕͨΒ τϦϛϯάͱ͔ • Lambda Layerͷग़ݱʹΑͬͯNative module͍͘͢ͳͬͨ
Lambda FunctionsΛ͏લʹ͓͖ͬͯ͘ࣄ VPC on Lambdaͱ Lambdaͷҧ͍
VPC on Lambda Functions? ؆୯ʹݴ͏ͱ௨ৗLambda VPCͷϦιʔεʹΞΫηεͰ͖ͳ͍ ͳͷͰ࿈ܞ͢ΔαʔϏε͕VPCͳͷ͔ͦ͏Ͱͳ͍ͷ͔Λߟྀ͢Δඞཁ͕͋Δ ྫ͑ VPC on
LambdaͰGoogle APIΛୟ͖ʹߦ͜͏ͱ͢ΔͱVPCͷ֎ʹग़Εͳ͍ͷͰҙ!! (݁ߏϋϚΔ᠘)
Lambda FunctionsΛ͏લʹ͓͖ͬͯ͘ࣄ CloudServiceͱ࿈ܞͨ͠Β ૄ௨Ͱ͖ͳ͍ͱ͔͋ΔͷͰ ͝ҙ (ಛʹRDS,EC2)
Lambda Functionsߏύλʔϯ(ྫ) • APIGateway + Lambda • ͜ͷ߹VPC on Lambdaʹ͓ͯ͘͠ͱRDSͱૄ
௨Ͱ͖Δ(HTTPAPI Gateway͕ݞΘΓͯ͘͠ ΕΔͷͰ) • ELB + Lambda • ࠷ۙͰ͖ΔΑ͏ʹͳͬͨ(API Gatewayͱಉ͡ߟ͑ ํͰOK) • API ServerҎ֎Ͱͳʹ͔͍ͨ͠߹ʹߟ͑Δ • CloudWatch logs or S3 + Lambda • ΠϕϯτυϦϒϯͰ͑Δදྫ
Lambda FunctionsΛ͏ʹ͋ͨͬͯͷਆπʔϧ Serverless Framework Boiler Template͔Βͷ࡞Deploy ͷશͯΛ͜ΕҰͭͰऩ·Δ CloudFormationॻ͚ΔͷͰશ෦Ͱ͖Δ
Serverlessͷ࠷ॳͷೋาΊ ECS Fargate
ECS Fargate • ϑϧϚωʔδυContainer • جຊԿͰͰ͖Δ • ͕Dockerͷֶशίετ͕͍ Βͳ͍Θ͚Ͱͳ͍!!(ॏཁ)
FargateͰ͓֮͑ͯ͘ࣄ • ECR (Elastic Container Registory) • DockerImageͷอଘઌ • DockerImageͷgithubͱ͓΅͑ͯΒͬͯ΄ͱΜͲͳ͍
• ECS Cluster • ContainerΛ·ͱΊΔശ • ClusterࣗମContainerΛάϧʔϓԽͯ͠ཧ͍ͯ͠Δ͚ͩ • ECS TaskDifinitions • DockerImageΛͲ͏ಈ͔͔͢ʁ(serverΛىಈ͢Δͱ͔ɻಛఆͷόο νίϚϯυ࣮ߦ͢Δͱ͔) • Ͳͷ͘Β͍ͷMemory,CPUΛͬͯTaskΛಈ͔͔͢ʁ • ఆٛ͢Δͷ • ͜Εrivisionͷ֓೦Λ͍ͬͯΔͷͰTaskఆٛͷgitͱ֮͑Εྑ͍
FargateͰ͓֮͑ͯ͘ࣄ(ͦͷ2) • ECS (Task) • TaskΛಈ͔͢(୯ମͷόονͳΒ͜ΕͰ ͳ͍) • ECS (Service)
• TaskΛىಈͬ͠ͺͳ͠ʹ͢ΔͳΒͪ͜Β (HTTP Server) • CloudWatch Event • cronͷΑ͏ʹఆظ࣮ߦͰTaskΛىಈͤͨ͞ ͍߹࿈ܞͤ͞Δ
Fargateͷҙࣄ߲ • SSH Ͱ͖ͳ͍ • ͕ཪٕϞʔυͰssm-agentΛΠϯετʔϧ͢Ε System ManagerͷSession Manager͔ΒೖΕΔ •
ίϯςφ͕ࢮΜͩ࣌ίϯςφͷStorageશͯͳ͘ ͳΔ • logσʔλFileอଘͷͷStorage Serviceʹసૹ ͠ͳ͍ͱࣦΘΕΔ(S3,RDS,Cloudwatch log) • ϩάશͯstdoutͰcloudwatch logʹอଘ͞ΕΔ • firelensͱ͍͏fluentίϯςφʹసૹ͢Δ͜ͱͰ͖ Δ
ͳΜ͔͍͠…….
Fargateͷ࠷ॳͷҰา • খ͞ͳόον͔Β࢝ΊΔ • LambdaͱҰॹ·ͣ׳ΕΔ • ҙ֎ͱ։ൃͷDockerfileͰͪΐͬͱઃఆ ม͑Δ͚ͩͰຊ൪ಈ͘Α(ຊʹ) • TaskDifnitionsͷCFͷαϯϓϧͨ͘͞
Μஔ͍ͯΔͷͰͬͯΈͯͶ • TaskDifnitions͚ͩͦ͜ΛטΈࡅ͚ ͱΓ͋͑ͣΠέΔ
ͳͥΔඞཁ͕͋Δͷ͔ʁ
Serverlessͷར • ཧ͢Δͷ͕ݮΔ • Ansible,PackerશࣺͯͯΕΔ • CloudFormationͱDockerImageҎ্!ʹͰ͖Δ • όονͳΒCPUͱ͔ؾʹ͢Δඞཁͳ͍ •
όον͕ճΓΔ͚ͩͷϝϞϦͱCPUΛઃఆ͢ΕΑ ͍ • εύΠΫͷΞϥʔϜ͖ʹ͠ͳͯ͘ྑ͍ • (RDSͱ͔ͷߟྀඞཁ͚ͩͲ • Aurora RDSʹ͢ΕΦʔτεέʔϧ͢Δ͔Β͔ ͳΓ࠷ڧ(͚ͩͲ͓͔͔ۚΔ)
Dockerࢮͳͳ͔ͬͨ • ࠷ॳ֓೦ͱֶशίετ͕ߴͯ͘ ྲྀߦΔͷ͔͜Εʁͱࢥ͚ͬͨͲ ؾ͍ͮͨΒσϑΝΫτʹ͍ۙ • GCPͱͷڝ૪ͰAWS͔ͳΓͷ ͍ͰFargate,LambdaΞοϓ σʔτͯ͘͠Δ(ઈରʹ)
·ͱΊ
Serverlessͷ࠷ॳͷҰา • Lambda,FargateͰখ͞ͳόον͔Β࢝ΊΔ • EventυϦϒϯΛҙࣝ͢Δ(S3࿈ܞ,SNS࿈ܞ ) • LambdaͰͰ͖Δ͜ͱΛߟ͑ͯͦΕ͕Ͱ͖ͳ ͍߹FargateͰContainer •
DockerImageҙ֎ͱຊ൪Ͱಈ͘ • CloudFormationͷSampleࢮ͵΄Ͳ࡞ͬ ͨͷͰ࣮Ζ͏ͱࢥ͑Ͱ͖Δ
͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠