個人開発者のためのaws-serverless-express #kyotojs

by potato4d(Takuma HANATANI)

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ݸਓ։ൃऀͷͨΊͷ aws-serverless-express HANATANI Takuma(@potato4d) 2018.03.23 #kyotojs

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Ξ • ࣗݾ঺հ • ݸਓ։ൃʹ͓͚ΔΠϯϑϥෛ୲ͷਏ͞ • PaaSʹΑΔղܾ • aws-serverless-expressͷྑ͞ • ݸਓ։ൃऀʹͱͬͯͷNode.jsͷΠϯϑϥͷͭΒ͞ • aws-serverless-expressͷ͸͡Ί͔ͨ

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ࣗݾ঺հ

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Ί͙ΈΜ ੠ - ಺ాਅྱ / ߴڮཥґ ߚຐ଒ͷগঁɻ13ࡀˠ14ࡀ ʢWEB൛Ͱ͸17ࡀલޙʣɻεϐϯΦϑʮ͜ͷૉ੖Β͍͠ ੈքʹരԍΛʂ ʯͷओਓެɻ ࠇ൅ʹߚ͍໨ɻࠇϚϯτ ʹࠇϩʔϒɺτϯΨϦ๧ࢠΛඃΓɺࠨ໨ʹ؟ଳʢผʹ໨ ͕ѱ͍Θ͚Ͱ͸ͳ͘ɺͨͩͷϑΝογϣϯʣΛ͚͍ͭͯ ΔɻΧζϚͱΞΫΞͷग़ͨ͠ύʔςΟʔϝϯόʔืूͷ ுΓࢴΛݟͯ஥ؒʹՃΘΔɻମ֨͸খฑͰࡉ਎ɺ਎௕͸ গͳ͘ͱ΋ΧζϚ(165cm)ΑΓ௿͍ɻ԰ෑͰ͸੺ͷύ IUUQTCJUMZ;#'.;P

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@potato4d • ౦ژͰϑϦʔϥϯε΍ͬͯΔ • ͍͍ͩͨϑϩϯτΤϯυ • ࠷ۙ͸ຆͲNuxtͷ։ൃͱ͔ϑϩϯτٕज़૬ஊ • Vue.js JP / VueFes Staff / Vue.js translator • ͜ͷؒٱʑʹNode.jsΛੜͰॻ͍ͨΒdeep copyͷͨ Ίʹobject-rest-spreadΛ࢖ͬͯCIΛམͱͨ͠ਓ

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ຊ୊

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͍͖ͳΓͰ͕͢օ͞Μʂ

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ݸਓ։ൃͯ͠·͔͢ʁ

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WebApp։ൃͯ͠·͔͢ʁ

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ݸਓ։ൃͷʮΠϯϑϥʯ ͭΒ͘ͳ͍Ͱ͔͢ʁ

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ʮϝϯςφϯεʯʹ ৽͍͜͠ͱΛ΍Δ࣌ؒΛ ୣΘΕ͍ͯ·ͤΜ͔ʁ

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ຊ࣭తͰͳ͍࡞ۀͰ ϞνϕΛԼ͍͛ͯ·ͤΜ͔ʁ

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ྫ͑͹ʮ͜Μͳ͜ͱʯ ىͬͯ͜ͳ͍Ͱ͔͢ʁ

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ݸਓ։ൃͷΠϯϑϥϝϯςͷͭΒΈ • IaaSΛआΓ͍ͯΔͱηΩϡϦςΟΞοϓσʔτͳͲʹ ࣮֬ʹ௥ΘΕͯͲ͔͜ͰରԠ͢ΔϋϝʹͳΔ • Φʔτεέʔϧͷߏ੒ʹ͠ͳ͍ͱෛՙʹରॲͰ͖ͳ ͍͚ͲɺݸਓͰΦʔτεέʔϧ͸͓ࡒ෍͕ͭΒ͍ • Կނ͔Docker͕յΕͯରԠͰझຯ։ൃͷ༹͕͚࣌ؒ Δ • ͜ͷۤ͠Έ͕WebAppͷ਺͚ͩ૿͍͑ͯ͘

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͋Γ͕ͪ

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࡞Ε͹࡞Δ΄Ͳ৽͍͠΋ͷΛ ࡞Δ͕࣌ؒݮ͍ͬͯ͘

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ϝϯςͨ͘͠ͳ͍

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Ͳ͏ʹ͔ͯ͠ղܾ͍ͨ͠

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ࠓ೔͸͜ΕΛղܾ͠Α͏

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Α͋͘Δղܾ๏

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PaaSΛ࢖͏

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Heroku࢖͍͕ͪ • ݴޠΛಛʹ໰Θͣʹ࢖͑ΔͷͰศར • جຊແྉͩ͠༗ྉͰ24hىಈʹͯ͠΋͔͔ͨͩ ݄800ԁ͙Β͍ • Let’s Encrypt ͷࣗಈߋ৽΋Ͱ͖Δ͠Addon΋ ͋ͬͯࢮ͵΄Ͳศར • େମ͜ΕͰΑ͘ͳΔ

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͚ͲͭΒ͍࣌΋͋Δ

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HerokuͰͭΒ͍ͱ͖ • ϨΠςϯγ͕ΩπΠ • ݸਓ։ൃͰFastlyΛ࢖͑ΔΘ͚͕ͳ͍ΜͩΑͳ • Naked domainͷSSLʹରԠͯ͠ͳ͍ • ϧʔτυϝΠϯͰSSL͍ͨ͠ͳΒCloudFrontט·ͤΖ • େྔʹಈ͔ͩ͢͠ͱແྉ࿮͕2ඵͰރׇ͢Δ • εέʔϦϯάੑೳ͕ऴ͍ྃͯ͠Δ

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GAE Standard࢖͍͕ͪ • Google͕޷͖ͳݴޠͩͱLambdaతͳ࣮ߦ࣌ؒ՝ۚͰ ΞϓϦέʔγϣϯΛಈ͔ͤΔͷͰ͍҆ • cronͱ͔΋͍ͭͯͯҙ֎ʹߴੑೳ • ೔ຊϦʔδϣϯ͕໪࿦͋ΔͷͰ͸΍ͯ͘࠷ߴͬΆ͍ • Naked domainͷSSLରԠ΋όονϦ • σϑΥͰΦʔτεέʔϧ͢Δ • େମ͜ΕͰΑ͘ͳΔ

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͜Ε΋ͭΒ͍͕࣌͋Δ

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GAE StandardͰͭΒ͍ͱ͖ • Google͕޷͖ͳݴޠҎ֎͸ߴ͍ϓϥϯ(Flexible)͔͠ ͳ͍ • ͦͷ޷͖ͳݴޠ͸Python/Go/Java͋ͨΓͰͭΒ͍ • Flexible͸DockerίϯςφΛಈ͔͚ͩ͢ͳͷͰී௨ʹ ֹ݄ͰGCEͷྉ͕͔͔ۚͬͯߴͯͭ͘Β͍ • Flexible͸ElasticBeanstalkΈ͍ͨͳ΋Μ

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NodeͰͷ։ൃऀʹਓݖ͕ͳ͍

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ͦ͜Ͱ

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΋͏Ұͭͷղܾํ๏

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FaaSʹࡌͤΔ

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Lambdaͱ͔CloudFunctions

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FaaS • Node.jsͰॻ͚Δ(Lambda͸Python/Java΋) • Lambda͸Πϕϯτͷ൚༻ੑΛɺCloudFunctions͸ Express LikeͳI/F͕ັྗͳܗͰఏڙ͞Ε͍ͯΔ • ϨΠςϯγ΋ॳճىಈ͕ඍົ͙Β͍ • ໪࿦࣮ߦ࣌ؒ՝ۚͰ͍҆ • ٯʹແݶʹϦΫΤετ͕͖ͨΒۚΛ͔͚ͯΦʔτεέʔ ϧແݶʹͯ͘͠Εͯศར

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͚ͲͭΒ͞΋͋Δ

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FaaSͷͭΒ͞ • ݁ہҰఆҎ্ಠࣗه๏ʹམͪண͘ • طଘͷNode.jsΞϓϦέʔγϣϯͷ࡞ΓํͰ࡞Δ͜ͱ ͕Ͱ͖ΔΘ͚Ͱ͸ͳ͍ • ٕज़తʹ൚༻ੑ͕ͳ͍ʢϩοΫΠϯʣ • ϩʔΧϧ࣮ߦ͕ͱʹ͔͘ΊΜͲ͍͘͞ • API Gateway͔Β౉ͬͯ͘Δ event ͷߏ଄͕…… • ׬੒඼͸Αͯ͘΋։ൃ్த͕ͭΒ͍

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ͭΒ͍

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FaaSͷಛ௃Λ࣋ͬͨ GAE/SE for Node.js͕͋Ε͹……

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ͦΜͳ࣌ͷٹੈओ

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aws-serverless-express

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ͱ͜ΖͰ

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aws-serverless-express Λ஌͍ͬͯΔਓʁ

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aws-serverless-express ࢖ͬͨ͜ͱ͋Δਓʁ

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aws-serverless-express • Amazon͕ϊϦͰ࡞ͬͪΌͬͨ  “AWS LambdaͰExpress͕ಈ͘” ϥΠϒϥϦ • طଘͷExpressΞϓϦέʔγϣϯʹMiddlewareΛ௥Ճ ͢Δ͚ͩͰԿނ͔LambdaͰಈ͘ • αʔόʔϨεͷԸܙΛड͚ͳ͕Β׳Ε਌͠ΜͩExpress ه๏ͰΞϓϦέʔγϣϯΛهड़Ͱ͖Δͷ͕ັྗ

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Source Code const serverlessExpress = require('aws-serverless-express/middleware') app.use(serverlessExpress.eventContext()) app.get('/', (req, res) => { res.json(req.apiGateway.event) })

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࣮ࡍʹ࢖ͬͯΔWebApp https://connpassport.com

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ྑ͞

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Ͳ͕͜ྑ͍ͷ͔ • ී௨ʹNode.jsͰ։ൃ͍ͯ͠ΔͷʹԿނ͔ແݶʹε έʔϧ͢Δ • ී௨ʹNode.jsͰ։ൃ͍ͯ͠ΔͷʹԿނ͔࣮ߦ࣌՝ۚ • ී௨ʹNode.jsͰ։ൃ͍ͯ͠Δͷʹͳ͔ͥϝϯςφϯ εϑϦʔ • Naked domainͷSSLɺϦʔδϣϯʹΑΔϨΠςϯγɺ ϩοΫΠϯ……͖ͬ͞·Ͱͷશ෦ͷ՝୊͕ղফ

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ཉ͔ͬͨ͠΋ͷશ෦ೖΓ

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aws-serverless-express͸ શͯΛղܾͯ͘͠ΕΔ

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ͭΒ͞ͷ͓͞Β͍ • ͦ΋ͦ΋IaaS͸ϝϯς͕ͭΒ͍ • Heroku͸ϨΠςϯγ͕ͭΒ͍ • GAE/SEʹ͸ͳ͍ • FaaS͸ϩοΫΠϯ͕ͭΒ͍

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ղܾͰ͖͍ͯΔ͔ • ϨΠςϯγ͸ͳ͍͔  ->ϥϯλΠϜͷॳճىಈͷ஗͚ͩ͞ • ϚωʔδυPaaS Likeʹ࢖͑Δ͔  ->࢖͑ͯ࠷ߴ • ಠࣗه๏͸ͳ͍͔  ->શͯExpressͦͷ··

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ղܾͰ͖͍ͯΔ͔ • εέʔϦϯά • ΊͪΌΊͪΌ͢Δ͠ٯʹਓ͕͍ͳ͍࣌͸͓͕͔͔ۚ Βͳ͍ͷͰͲͬͪͷҙຯͰ΋࠷ߴ • ӡ༻ίετ • جຊతʹFaaSͳͷͰօແɺূ໌ॻ΋ACM • API GW + ACM + Route53ʹͳΔͷͰNaked OK

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ૉఢʂ

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࢖͍͍ͨʂ

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͸͡Ί͔ͨ

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awslabs/aws-serverless-express ʹΞΫηε

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͓΋ΉΖʹexampleΛΫϦοΫ

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Win/Mac/LinuxରԠͷςϯϓϨ

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README͕ΊͬͪΌஸೡ

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طଘϓϩδΣΫτͷҠߦ

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yarn add aws-serverless-express

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lambda.jsΛ࡞੒ const awsServerlessExpress = require('aws-serverless-express') const app = require('./app') const server = awsServerlessExpress.createServer(app) exports.handler = (event, context) => awsServerlessExpress.proxy(server, event, context)

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Expressଆ(e.g. app.js)ʹ௥ه const serverlessExpress = require('aws-serverless-express/middleware') app.use(serverlessExpress.eventContext())

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͜ͷ··LambdaʹσϓϩΠͰ OK

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·ͱΊ

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aws-serverless-express • LambdaͰExpressΛಈ͔͢ϥΠϒϥϦ • Expressϛυϧ΢ΣΞͱͯ͠։ൃ͞Ε͓ͯΓɺ طଘϓϩδΣΫτ΁ͷಋೖ΋Մೳ • Expressͷ͔͖৺஍ͰLambdaͷPros/ConsΛ Ҿ͖ܧ͙ΞϓϦέʔγϣϯΛ࡞Δ͜ͱ͕Մೳ

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Α͞ • ݱঢ়ͷPaaSࣄ৘Ͱ͸ຬͨͤͳ͍ཁ݅ΛຬͨͤΔ • ௿ϨΠςϯγ • ࣮ߦ࣌ؒ՝͔ۚͭΦʔτεέʔϦϯά • Node.js؀ڥ͕ಈ͘ • Naked domainͷSSLରԠ • ͷશ෦ೖΓ؀ڥ

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͸͡ΊΔʹ͸ • ެࣜϨϙδτϦͷexample͕ϘΠϥʔϓϨʔ τͳͷͰͦͷ··࢖͑Δ • طଘϓϩδΣΫτ΁ͷಋೖ΋READMEʹ͋Δ ͱ͓ΓʹmiddlewareΛ௥Ճ͢Δ͚ͩ