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@harukasan / Shunsuke Michii ࣮ࡍӡ༻ͯ͠ΈͯΘ͔ͬͨɺେن໛.BTUPEPOΠϯελϯεΛӡ༻͢Δίπ

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@Harukasan Shunsuke MICHII Lead engineer of pixiv Inc.,
 Product manager of ImageFlux,
 Infrastructure engineer, Kibana, Gopher

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࣮ࡍӡ༻ͯ͠ΈͯΘ͔ͬͨɺେن໛.BTUPEPOΠϯελϯεΛӡ༻͢Δίπ

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Mastodon

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͍͖ͭͬ͞v1.2.2Λͩͨ͠

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github.com/pixiv/mastodon:pawoo

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Ruby on Rails node.js PostgreSQL Redis SendGrid Sidekiq ΫϥΠΞϯτ Websocket
 (streaming) HTTP SMTP ϞμϯͳRuby on RailsΞϓϦέʔγϣϯ nginx

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Ruby on Rails node.js PostgreSQL Redis SendGrid Sidekiq ΫϥΠΞϯτ Websocket
 (streaming) HTTP SMTP ϞμϯͳRuby on RailsΞϓϦέʔγϣϯ nginx RESTͬΆ͍API

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Ruby on Rails node.js PostgreSQL Redis SendGrid Sidekiq ΫϥΠΞϯτ Websocket
 (streaming) HTTP SMTP ϞμϯͳRuby on RailsΞϓϦέʔγϣϯ nginx RESTͬΆ͍API ετϦʔϛϯάAPI

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10࣌ؒͰϦϦʔε

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Pawooͷߏ੒

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AWSͰγϡοͱ΍Δ • ͕࣌ؒͳ͍͚Ͳ࠷༏ઌ͸҆ఆੑ • RDS/ElasticaceͷϚϧνAZߏ੒ • ϝσΟΞ͸S3ʹอଘ • EC2ฒ΂ͯALBͰϩʔυόϥϯε • CloudFrontͰྲྀ͢ʢ΋͏΍Ίͨʣ • ظؒݶఆαΠτΛཱͯΔ࣌ͷϊ΢ϋ΢Λྲྀ༻

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ΠϯελϯεΛฒ΂Δ • ͢΂ͯͷΠϯελϯε͸ಉҰߏ੒ • γϡοͱͭͬͯ͘AMIͰ૿΍͢ • ԣʹฒ΂ͯεέʔϧΞ΢τ • ͦͷ͏ͪΦʔτεέʔϦϯά͍ͨ͠

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Docker͔Β͸͕͢ • શ෦systemdαʔϏεʹஔ͖׵͑ͨ • ͦͷ··࢖͏ͷ͸ͪΐͬͱ೉͍͜͠ͱ͕ଟ͍ • σϓϩΠͷ͜ͱ΍ΒͳΜ΍Βߟ͍͑ͯΔͱͪΐͬͱ༨༟͕ͳ͍ • DockerͰ͙͢΍ΔͳΒϗοτσϓϩΠͱ͔Ϧιʔε഑෼ͷ࢓૊ΈΛ ͋Β͔͡Ί༻ҙ͓ͯ͘͠ඞཁ͕͋Γͦ͏ʢͦͷ͏ͪ΍Γ͍ͨʣ

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ͦͷ೔ͷ͏ͪʹϦϦʔε͞Ε͕ͨ ͙͢ʹΤϥʔΛฦ͠͸͡ΊΔ ʢ͜͜ΒลͰνϟοτΛݟ࢝ΊΔʣ

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nginx • ϦΫΤετόοϑΝϦϯάͷͨΊʹPumaͷલʹnginxΛ͓͘ • Τϥʔ͕ग़͍ͯͨͷͰͳ͓ͨ͠ • worker_rlimit_nofile: limitΛ૿΍͓ͯ͘͠ • worker_connections: ίωΫγϣϯͨ͘͞Μ͸ΔͷͰ • ϩάϩʔςʔτͷઃఆ͕ೖͬͯͳ͔ͬͨͷͰೖΕͨ • όϥϯγϯά͸EC2ͷnginx͡Όͳͯ͘ALBͰ΍Δ

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ৄ͘͠͸͜ͷຊʹ

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PostgreSQL • PostgreSQL͸ίωΫγϣϯ͝ͱʹfork͢Δ
 ʢฐࣾ͸͢΂ͯMySQLͩͬͨͷͰ஌ݟͳ͠ʣ • ίωΫγϣϯϓʔϧΛ͏·͍۩߹ͷ஋ʹઃఆ͢Δ • ΠϯελϯεΛεέʔϧΞοϓͯ͠ରԠ • ίʔυʹ࠷దԽΛೖΕͯΠϯελϯεαΠζখͨ͘͞͠Γͨ͠ • Մ༻ੑͱόοΫΞοϓ͸RDSʹ͓೚ͤ • PgBouncer࢖ͬͨํ͕͍͍͔΋ʁͱࢥ͍ͳ͕Βාͯ͘࢖ͬͯͳ͍

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͜͜ͰεέʔϧΞοϓ

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஌ݟٻΉ

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Ruby on Rails node.js PostgreSQL Redis SendGrid Sidekiq ΫϥΠΞϯτ Websocket
 (streaming) HTTP SMTP ϞμϯͳRuby on RailsΞϓϦέʔγϣϯ nginx

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Ruby on Rails node.js PostgreSQL Redis SendGrid Sidekiq ΫϥΠΞϯτ Websocket
 (streaming) HTTP SMTP nginx ϢʔβʔΠϯλʔϑΣʔε ϞμϯͳRuby on RailsΞϓϦέʔγϣϯ

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Ruby on Rails node.js PostgreSQL Redis SendGrid Sidekiq ΫϥΠΞϯτ Websocket
 (streaming) HTTP SMTP nginx ϞμϯͳRuby on RailsΞϓϦέʔγϣϯ ϝΠϯϩδοΫ

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Sidekiq • Mastodonͷϝοηʔδύογϯά͸SidekiqͰߦΘΕΔ • τΡʔτͷ഑৴ • ετϦʔϛϯά • ϦϞʔτΠϯελϯε΁ͷ഑৴ • 1τΡʔτ͝ͱʹϑΥϩϫʔͷ਺͚ͩenqueue͞ΕΔ • ϑΥϩϫʔ͕ଟ͍Ϣʔβʔͩͱ΍͹͍

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ීஈͷΩϡʔͷ༷ࢠʢͪΐͬͱલʣ

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ͨ·ʹ͜͏ͳΔ

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ͨ·ʹ͜͏ͳΔ

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Ωϡʔͷछྨ default pull push mail • ΄͔ͷશ෦ͷδϣϒ • ϦϞʔτΠϯελϯε΁ͷ഑৴ • ϝʔϧͷૹ৴

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Sidekiq٧·Δ໰୊ • σϑΥϧτͩͱ͢΂ͯͷΩϡʔΛ̍ͭͷSidekiqϓϩηεͰॲཧ͢Δ • ϦϞʔτΠϯελϯε͕٧·Δͱpull/pushͷΩϡʔ͕٧·Δ • pull/pushͷ͍ͤͰλΠϜϥΠϯ͕஗Ԇ͢Δʂ • ͜ͷ··ͩͱαʔϏεͱͯ͠ऴΘͬͯ͠·͏ͷͰɺϓϩηεΛ෼͚Δ • Sidekiq͸1ϓϩηεͰ1ίΞʢ100%ʣ·Ͱ͔͠࢖ͬͯ͘Εͳ͍ • ϓϩηεΛͨ͘͞ΜཱͯͯΧόʔ

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ίϚϯυϥΠϯҾ਺Ͱࢦఆ͢Δ͚ͩ [Service] Type=simple User=mastodon WorkingDirectory=/home/mastodon/live Environment="RAILS_ENV=production" Environment="DB_POOL=40" ExecStart=/usr/local/rbenv/shims/bundle exec sidekiq -c 40 -q default TimeoutSec=15 Restart=always

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SidekiqϓϩηεΛ෼͚Δ sidekiq-default-1.service sidekiq-default-2.service sidekiq-default-3.service sidekiq-pullpush.service sidekiq-mail.service 1Πϯελϯεʹ͜Εཱ͚ͩͯͯΔɿ σϑΥϧτ͚ͩͰ1,000εϨουҎ্ 40 40 40 10 5 εϨου਺

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Sidekiqͷϓϩηεը໘͕
 ͍ͩͿݟͮΒ͍

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Sidekiq٧·Δ໰୊ͷ՝୊ • ϦϞʔτΠϯελϯε͕٧·Δͱ૬มΘΒͣpull/push͕٧·Δ • ϓϩηεΛཱͯͯΧόʔͯ͠Δ͚Ͳɺ΄͔ͷΠϯελϯε͔Β͢Δͱ ٸʹϦΫΤετ͕૿͑ͯͭΒͦ͏…… • ஗͍Πϯελϯεͱ͔େن໛ΠϯελϯεͷॲཧΛͲ͏ʹ͔͍ͨ͠ • ͦ΋ͦ΋τΡʔτ͋ͨΓͷδϣϒ਺͕N+1ʹͳͬͯΔͷ͕΍͹͍

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ղܾͯ͠ͳ͍͚Ͳ·ͱΊ • AWS࢖ͬͯγϡοͱཱͯͯӡ༻։࢝ • ϚετυϯͷϝΠϯ͸Sidekiqδϣϒ • SidekiqͷΩϡʔΛ͏·͘͞͹͚ΔͱΑ͍ • SidekiqϓϩηεΛεϙοτΠϯελϯεͰ૿΍͢Α͏ʹ͍ͨ͠ • Ͳ͔ͬͪͱ͍͏ͱ࠷దԽͨ͠ํ͕Αͦ͞͏