Multi-stage Builds Patterns & Practice

by orisano

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Multi-stage Builds Patterns & Practice Docker Meetup Tokyo #26 #dockertokyo @orisano

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ࣗݾ঺հ • @orisano • ۦ͚ग़͠ͷΞϓϦέʔγϣϯΤϯδχΞ • ޮ཰తͳdocker buildΛ໨ࢦͯ͠ؤு͍ͬͯΔ

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օ͞Μ Multi-stage Builds ͯ͠·͔͢ʁ

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ͦ΋ͦ΋ Multi-stage Builds ͱ͸

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Docker 17.05 (2017-05-04) ͔Βೖͬͨػೳ

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Docker 17.05 (2017-05-04) ͔Βೖͬͨػೳ

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എܠ

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ͦ΋ͦ΋ push͢ΔΠϝʔδΛ খ͍ͨ͘͞͠

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Multi-stage BuildsҎલ

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build༻ͷDockerﬁleΛ࢖ͬͯ buildͯ͠volume͔Β ੒Ռ෺ΛऔΓग़͢

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Ұ࿈ͷྲྀΕΛ shell scriptͰॻ͍͍ͯͨ $ ./build.sh

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͜ΕΛDockerﬁleͷΈͰ ࣮ݱͰ͖ΔΑ͏ʹͳͬͨ

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ෳ਺ͷFROM COPY —from ͰͷผΠϝʔδ͔Βͷίϐʔ

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্ͷΑ͏ͳഎܠͰ௥Ճ͞Εͨ Multi-stage Builds

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࢖͑Δ΋ͷ͸࢖͏ͷ͕ਓؒ

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͍ΖΜͳ׆༻ํ๏͕͋Δ

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https://medium.com/@tonistiigi/advanced- multi-stage-build-patterns-6f741b852fae

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https://speakerdeck.com/ garethr/advanced-docker- image-build-patterns (2019-11-01 Velocity)

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Multi-stage Builds Patterns

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builder & app alias image tested app inner base image split step

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builder & app alias image tested app inner base image split step

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#VJMEFS "QQ

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builder & app alias image tested app inner base image split step

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base imageΛ ໌ࣔతʹڞ௨ԽͰ͖Δ

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builder & app alias image tested app inner base image split step

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#VJMEFS "QQ 5FTU

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#VJMEFS "QQ 5FTU

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builder & app alias image tested app inner base image split step

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#BTF "QQ "QQ

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builder & app alias image tested app inner base image split step

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'BU#VJMEFS "QQ

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#VJMEFS "QQ 7FOEPS )FBWZ )FBWZ

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cacheΛ࠷େݶ׆༻Ͱ͖Δ

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Multi-stage Builds͸ buildkitͱ૬ੑ͕ྑ͍

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ฒྻbuildʹΑΔ ߴ଎Խ͕ݟࠐΊΔʂ

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Multi-stage builds͸࠷ߴʂ

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͔͠͠

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buildkit͡Όͳ͍ͱਏ͍

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CI͸buildkit ࢖͑ͳ͔ͬͨΓ͢Δ

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CI্ͷ Multi-stage Buildsͷ cacheઓུ

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͜Ε·Ͱͷ΍Γํͩͱ খ͍͞ΠϝʔδͷcacheΛ ͯ͠͠·͏

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ຊ౰ʹඞཁͳͷ͸ ॏ͍Πϝʔδͷcache

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CIʹ͓͚Δ Multi-stage Builds͸ ΄΅͢΂ͯͷεςʔδΛ ໌ࣔతʹbuild͢Δ͔͠ͳ͍

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ͦͷ্Ͱ Ͳ͏͍͏ઓུΛऔΔ͔

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save & load Or push & pull + —cache-from

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save & load ͷ৔߹

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Pros ֎෦ʹstorage͕͋Ε͹ ࣮ݱՄೳ ϑΝΠϧड͚౉͠ͷΈͰྑ͍

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Cons αΠζ͕Ͱ͔͍ ಉ͡ϕʔεΠϝʔδͰ΋ॏෳ save͕ͳΜ͔ॏ͍

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push & pull ͷ৔߹

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Pros Registry͕͋Ε͹Մೳ ѹॖ͞Εͨঢ়ଶͰड͚౉͠ ϕʔεΠϝʔδ͕ॏෳ͠ͳ͍

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Cons cache༻tag or image͕ඞཁ push & pullͷෛՙ

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ͿͬͪΌ͚ݱঢ়Ͱ͸ CI্ͷcache͕໘౗ष͗͢Δ

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CIͰ cacheΛޮ͔͍ͤͨͳΒ 2 stage·Ͱ (ݸਓͷײ૝Ͱ͢)

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CIͱͷ૬ੑ΋͋Δ͕ pipeline͕ෳࡶʹͳͬͨΓ ͦ΋ͦ΋࣮ݱͰ͖ͳ͔ͬͨΓ

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Multi-stage Buildsͷ࢖͍ॴ

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buildΑΓpullͷ΄͏͕ଟ͍ dockerd͕มΘΒͳ͍؀ڥ खݩͰͷbuildޮ཰Λ࠷େԽ

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CI޲͖Ͱ͸ͳ͍

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ͦΕͰ΋΍Γ͍ͨਓͷͨΊʹ

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࡞Γ·ͨ͠ orisano/castage

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DockerﬁleΛಡΜͰ͖ͯ ͢΂ͯͷεςʔδΛநग़ pull ͱ cache-fromΛ ࣗಈੜ੒ͯ͘͠ΕΔ