GAE/Go の勘どころ - Speaker Deck

GAE/Go の勘どころ

by Osamu TONOMORI

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GAE/Go ͷצͲ͜Ζ @osamingo golang.tokyo #5 (2017/04/27)

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The golang.tokyo logo was made by Takuya Ueda. The Go gopher was designed by Renee French.

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Agenda 1. ࣗݾ঺հ 2. GAE ʹ͍ͭͯ 3. GAE ্Ͱͷ Go app ͷצͲ͜Ζ 4. ӡ༻͢Δͱ͖ͷ Tips 5. ·ͱΊ 3

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Agenda 1. ࣗݾ঺հ 2. GAE ʹ͍ͭͯ 3. GAE ্Ͱͷ Go app ͷצͲ͜Ζ 4. ӡ༻͢Δͱ͖ͷ Tips 5. ·ͱΊ 4

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ࣗݾ঺հ

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ۭલઈޙͷ͓͓͓͒ʂʂौ୩/࿡ຊ ໦ʹੜଉ͍ͯ͠ΔΰΥΥϑΝΝΝΝ 㷉ˑϖˑ㷊ʂʂʂ৽ن։ൃΛѪ͠ɺ ৽ن։ൃʹѪ͞Ε͓ͨͱ͒͜ʔʂʂ

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;͚ͯ͟ɺ͢Έ·ͤΜͰͨ͠ɻ

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ࣗݾ঺հ • ओ৿ ཧ - Osamu TONOMORI • @osamingo • גࣜձࣾι΢κ΢ • 2016/08 ~ • Software engineer • Go ྺ • 2014/10 ~ • GAE/Go ͸ɺ2016/08 ~ 8

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ࣗݾ঺հ

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Agenda 1. ࣗݾ঺հ 2. GAE ʹ͍ͭͯ 3. GAE ্Ͱͷ Go app ͷצͲ͜Ζ 4. ӡ༻͢Δͱ͖ͷ Tips 5. ·ͱΊ 12

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GAE ʹ͍ͭͯ

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GAE ͱ͸ • Google App Engine • Google ͕΍͍ͬͯΔ PaaS ɻ • 2008 ೥͙Β͍͔Β͋ΔɻʢGCPͰ͸࠷ݹࢀ૊ʣ • Scaling Λௐ੔͢Ε͹ɺແྉͰ࢖͑Δɻ 14

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GAE ͱ͸ • Google App Engine • Google ͕΍͍ͬͯΔ PaaS ɻ • 2008 ೥͙Β͍͔Β͋ΔɻʢGCPͰ͸࠷ݹࢀ૊ʣ • Scaling Λௐ੔͢Ε͹ɺແྉͰ࢖͑Δɻ • Heroku ͱಉ͡ײ͡Ͱ৮Δͱ (ʋ´ω`) ͳײ͡ʹͳΔɻ • ಠࣗͷϧʔϧ΍ɺ֮͑Δ͜ͱ͕ଟ͍ɻ 15

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Standard and Flexible Environment • Standard Environment (SE) • GAE ͱ͍ͬͯࢦ͢ͷ͸ɺ͍͍ͩͨͬͪ͜ɻ • ݴޠ੍໿΍ɺಠࣗͷϧʔϧ͸ଟ͍͕͓खܰʹࢼͤΔɻ • Go, Python, Java, PHP • Flexible Environment (FE) • Cloud Next 2017 Ͱɺ GA ʹͳͬͨɻ • Docker ͳͷͰɺಛʹ੍໿͸ແ͍ɻ 16

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Flexible Environment Λ࢖͏৔໘ • ωοτϫʔΫىҼͷཁٻ͕͋Δ৔߹ • ݻఆ IP Ͱ֎෦઀ଓ͠ͳ͍ͱ͍͚ͳ͍ɻ • ಺෦ެ։ݶఆͷαʔϏε΁ͷΞΫηεɻ • Ұ࣌తͳσΟεΫॻ͖ࠐΈ͕ඞཁͳ৔߹ • ϑΝΠϧΛ࡞੒͍ͨ͠৔߹ͳͲɻ (tmpfs) 17

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GAE/Go (SE) Ͱͷز͔ͭͷ੍໿ • Go 1.6.4 • syscall, unsafe package ͸ɺجຊతʹ࢖͑ͳ͍ɻ • // +build !appengine ͷೝ஌ͷ௿͞… 18

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GAE/Go (SE) Ͱͷز͔ͭͷ੍໿ • Go 1.6.4 • syscall, unsafe package ͸ɺجຊతʹ࢖͑ͳ͍ɻ • // +build !appengine ͷೝ஌ͷ௿͞… • context.Context Λ࣋ͪӡΜͰߦ͘ɻ • context Λ࢖ͬͯ DB ΞΫηε౳Λߦ͏ɻ • ٯʹ͍͏ͱɺcontext ͕ແ͍ͱ΄΅Կ΋ग़དྷͳ͍ɻ 19

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Go 1.8 ͕͘Δ͔΋

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଴ͭͷ

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Agenda 1. ࣗݾ঺հ 2. GAE ʹ͍ͭͯ 3. GAE ্Ͱͷ Go app ͷצͲ͜Ζ 4. ӡ༻͢Δͱ͖ͷ Tips 5. ·ͱΊ 25

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GAE ্Ͱͷ Go app ͷצͲ͜Ζ

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DB ͬͯԿ࢖͏ͷʁ

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DB ͷબ୒ʹ͍ͭͯ • Cloud Datastore • NoSQL (Based BigTable) • GAE ͷ৔߹ɺجຊతʹ Datastore Λར༻͢Δɻ • มଶྗઃܭྗ͕ࢼ͞ΕΔɻ 28

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DB ͷબ୒ʹ͍ͭͯ • Cloud Datastore • NoSQL (Based BigTable) • GAE ͷ৔߹ɺجຊతʹ Datastore Λར༻͢Δɻ • มଶྗઃܭྗ͕ࢼ͞ΕΔɻ • Cloud SQL • Managed MySQL/PostgreSQL(β) • ౦ژϦʔδϣϯͷ Latency ͕Ϋι໰୊΋ղܾࡁΈɻ 29

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Cloud Datastore ͷ৔߹ • ެࣜͷ datastore ύοέʔδΛ௚Ͱ͸࢖Θͳ͍ɻ • ඞͣ wrap ͯ͠࢖ͬͨํ͕Α͍ɻ • interface, validation ͳͲͪΌΜͱ΍Γ·͠ΐ͏ɻ • goon ͱ͔΋͋ΔͷͰɺࢀߟʹ͢ΔͱΑ͍ɻ 30

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Cloud Datastore ͷ৔߹ • ެࣜͷ datastore ύοέʔδΛ௚Ͱ͸࢖Θͳ͍ɻ • ඞͣ wrap ͯ͠࢖ͬͨํ͕Α͍ɻ • interface, validation ͳͲͪΌΜͱ΍Γ·͠ΐ͏ɻ • goon ͱ͔΋͋ΔͷͰɺࢀߟʹ͢ΔͱΑ͍ɻ • ͨͩɺઃܭ͕㙽ʹ֯೉͍͠ɻ 31

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Cloud SQL ͷ৔߹ • ͳΜ΍͔Μ΍ී௨ʹ࢖͑·͢ɻ • sql ύοέʔδͰ઀ଓ؅ཧ͢ΔͷͰɺྑ͠ͳʹɻ 34

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Cloud SQL ͷ৔߹ • ͳΜ΍͔Μ΍ී௨ʹ࢖͑·͢ɻ • sql ύοέʔδͰ઀ଓ؅ཧ͢ΔͷͰɺྑ͠ͳʹɻ • ͱ͸͍͑ɺ࢖͏લʹ஫ҙ఺͕͋Δ… 35

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ಉ࣌઀ଓ਺͕࠷େ 12 ݸ

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ಉ࣌઀ଓ਺͕࠷େ 12 ݸ (Master, Slave ͷ߹ܭ)

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sql.DB_SetMaxOpenConns(n int)

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Vendoring ͬͯͲ͏ͳͷʁ

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Vendoring ʹ͍ͭͯ • GOPATH ͕ɺϓϩδΣΫτϕʔεʹͳΔɻ 42

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Vendoring ʹ͍ͭͯ • GOPATH ͕ɺϓϩδΣΫτϕʔεʹͳΔɻ • vendor σΟϨΫτϦͱ͔ɺ࢖͑ͳ͍ɻ • dep, glide, gvt ͳͲݢฒΈ࢖͑·ͤΜɻ 43

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Vendoring ʹ͍ͭͯ • GOPATH ͕ɺϓϩδΣΫτϕʔεʹͳΔɻ • vendor σΟϨΫτϦͱ͔ɺ࢖͑ͳ͍ɻ • dep, glide, gvt ͳͲݢฒΈ࢖͑·ͤΜɻ • ےྗͰΧόʔʂʂ 44

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Vendoring ʹ͍ͭͯ • GOPATH ͕ɺϓϩδΣΫτϕʔεʹͳΔɻ • vendor σΟϨΫτϦͱ͔ɺ࢖͑ͳ͍ɻ • dep, glide, gvt ͳͲݢฒΈ࢖͑·ͤΜɻ • ےྗͰΧόʔʂʂ • ϓϩδΣΫτϕʔεͷґଘ؅ཧ 45

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gb ʹΑΔvendoring • gb vendor ίϚϯυʹΑΔґଘ؅ཧ • fetch, update, purge ౳ͻͱ௨ΓͰ͖Δɻ 47

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gb ʹΑΔvendoring • gb vendor ίϚϯυʹΑΔґଘ؅ཧ • fetch, update, purge ౳ͻͱ௨ΓͰ͖Δɻ • ͨͩɺinit ͚ͩαϒίϚϯυ͕ແ͍ͷͰɺےྗ 48

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gb ʹΑΔvendoring • gb vonder ίϚϯυʹΑΔґଘ؅ཧ • fetch, update, purge ౳ͻͱ௨ΓͰ͖Δɻ • ͨͩɺinit ͚ͩαϒίϚϯυ͕ແ͍ͷͰɺےྗ 49 HPMJTUGb\\SBOHF*NQPSUT^^\\^^\\FOE^^\\SBOHF5FTU*NQPSUT^^\\^^ \\FOE^^ 71"5) cUSaOcTPSUcVOJRcHSFQ&a DPNcPSHc JO cYBSHTO*\^TIDHCWFOEPSGFUDI\^

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gb ʹΑΔ GOPATH ؅ཧ • gb gae ίϚϯυʹΑΔ GOPATH ͷ؅ཧ • test, serve, deploy ͷ GOPATH Λղܾͯ͘͠ΕΔɻ • ެࣜఏڙͰ͸ແ͍ͷͰɺผ్Πϯετʔϧ͢Δɻ • go get -u github.com/PalmStoneGames/gb-gae 50

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ConﬁgurationͬͯͲ͏ͳͷʁ

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Conﬁguration ʹ͍ͭͯ • The Twelve-Factor App - https://12factor.net/ • The twelve-factor app stores conﬁg in environment variables. 52

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Conﬁguration ʹ͍ͭͯ • The Twelve-Factor App - https://12factor.net/ • The twelve-factor app stores conﬁg in environment variables. • GAE ΋ಉ͡ࢥ૝ͳͷͰɺ؀ڥม਺ʹೖΕ·͠ΐ͏ɻ 53

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Conﬁguration ʹ͍ͭͯ • Test ͷͱ͖͸ɺͲ͏͢Δͷ͔ʁ 54

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Conﬁguration ʹ͍ͭͯ • Test ͷͱ͖͸ɺͲ͏͢Δͷ͔ʁ • ં֯ Go ࢖ͬͯΔΜͩ͠ɺ direnv ࢖͓͏ɻ • ./test/.envrc ʹςετ༻ͷ؀ڥม਺Λઃஔ͢Δɻ 55 EJSFOWFYFDUFTUHCHBFUFTUTSDʜ

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Agenda 1. ࣗݾ঺հ 2. GAE ʹ͍ͭͯ 3. GAE ্Ͱͷ Go app ͷצͲ͜Ζ 4. ӡ༻͢Δͱ͖ͷ Tips 5. ·ͱΊ 56

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ӡ༻͢Δͱ͖ͷ Tips

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Deploy ͬͯͲ͏ͳͷʁ • Trafﬁc migration Λ࢖͏ͱɺ͍Ζ͍ΖͰ͖Δɻ • Blue/Green deployment, Canary Release 58

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Deploy ͬͯͲ͏ͳͷʁ • Trafﬁc migration Λ࢖͏ͱɺ͍Ζ͍ΖͰ͖Δɻ • Blue/Green deployment, Canary Release • context Λ࢖ͬͨࣄલॲཧ 59

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Deploy ͬͯͲ͏ͳͷʁ • Trafﬁc migration Λ࢖͏ͱɺ͍Ζ͍ΖͰ͖Δɻ • Blue/Green deployment, Canary Release • context Λ࢖ͬͨࣄલॲཧ 60

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Monitoring ͬͯͲ͏ͳͷʁ • Stackdriver ͕ɺͻͱ௨Γʹͳͬͯ͘ΕΔɻ • http status code, datastore, taskqueue etc.

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Monitoring ͬͯͲ͏ͳͷʁ • Stackdriver ͕ɺͻͱ௨Γʹͳͬͯ͘ΕΔɻ • http status code, datastore, taskqueue etc. • Error log ؂ࢹ΋ɺStackdriver Logging ͱ࿈ܞͰ͖Δɻ • Slack ࿈ܞ΋ϥΫϥΫ

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Agenda 1. ࣗݾ঺հ 2. GAE ʹ͍ͭͯ 3. GAE ্Ͱͷ Go app ͷצͲ͜Ζ 4. ӡ༻͢Δͱ͖ͷ Tips 5. ·ͱΊ 63

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·ͱΊ • …ʹೖΔલʹ Release Notes ͷ֬ೝ IUUQTDMPVEHPPHMFDPNBQQFOHJOFEPDTTUBOEBSEHPSFMFBTFOPUFT