docker build battle - Speaker Deck

docker build battle

by orisano

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Docker Build Battle Docker Meetup Tokyo #25 LT #dockertokyo @orisano

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Docker buildʹԿΛٻΊΔ͔

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buildࣗମΛߴ଎ʹʂ ग़ྗ͞ΕΔimageΛখ͘͞ʂ

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imageΛখ͘͢͞Δͷ͸ docker push͢Δͱ͖ͷ଎౓ docker pull͢Δͱ͖ͷ଎౓ ͷߴ଎Խʹͭͳ͕Δ

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ࠓ೔࿩͍ͨ͜͠ͱ

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ͲͷΑ͏ʹ଎͘͢Δ͔ ͲͷΑ͏ʹখ͘͢͞Δ͔

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ͲͷΑ͏ʹ଎͘͢Δ͔ ͲͷΑ͏ʹখ͘͢͞Δ͔

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ͲͷΑ͏ʹ଎͘͢Δ͔ • ίϚϯυͦͷ΋ͷΛ଎͘͢Δ • cacheΛޮ͔ͤΔ • ґଘͷͳ͍εςʔδΛฒྻͰ࣮ߦ͢Δ • ඞཁͳ͍εςʔδΛbuild͠ͳ͍

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ͲͷΑ͏ʹ଎͘͢Δ͔ • ίϚϯυͦͷ΋ͷΛ଎͘͢Δ • cacheΛޮ͔ͤΔ • ґଘͷͳ͍εςʔδΛฒྻͰ࣮ߦ͢Δ • ඞཁͳ͍εςʔδΛbuild͠ͳ͍

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ίϚϯυͦͷ΋ͷΛ଎͘͢Δ

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଎͘Ͱ͖ΔίϚϯυ΋͋Δ

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Α͘ૺ۰͢Δ ଎͘Ͱ͖ΔίϚϯυ

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GitHub͔Β࣮ߦϑΝΠϧΛ curl or wgetͰऔಘ͢Δ

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GitHub Release͸S3 S3͸Rangeϔομʔ͕࢖͑Δ

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ͭ·Γ ฒྻμ΢ϯϩʔυ͕Մೳ

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github.com/orisano/rget

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؀ڥʹΑΓ·͕͢ 5min -> 2min

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ͲͷΑ͏ʹ଎͘͢Δ͔ • ίϚϯυͦͷ΋ͷΛ଎͘͢Δ • cacheΛޮ͔ͤΔ • ґଘͷͳ͍εςʔδΛฒྻͰ࣮ߦ͢Δ • ඞཁͳ͍εςʔδΛbuild͠ͳ͍

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cacheΛޮ͔ͤΔ

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docker build͢ΔϚγϯ͕ ಉҰͷ৔߹ ಉҰͰͳ͍৔߹

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docker build͢ΔϚγϯ͕ ಉҰͷ৔߹ ಉҰͰͳ͍৔߹

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cacheͷ࢓૊ΈΛཧղ͢Δ

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RUN͸ จࣈྻ͕มΘΒͳ͍ݶΓ جຊతʹcache͞ΕΔ

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COPY, ADD͢ΔϑΝΠϧͷ ಺༰͕มΘͬͨ৔߹ Ҏ߱ͷRUNͷcache͕ഁغ

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ͳͷͰ lockﬁleͳͲΛઌʹίϐʔͯ͠ install͚ͩͯ͠cacheͤ͞Δ

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docker build͢ΔϚγϯ͕ ಉҰͷ৔߹ ಉҰͰͳ͍৔߹

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CI্Ͱbuild͢Δͱ͖ͳͲ cache͕ͳ͍͜ͱ͕ଟ͍

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docker save & load or docker pull docker build —cache-from Λ࢖͏

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image͕େ͖͍/layer͕ଟ͍ ৔߹ buildͷ΄͏͕ૣ͍͜ͱ΋͋Δ

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image͕େ͖͍/layer͕ଟ͍ ৔߹ buildͷ΄͏͕ૣ͍͜ͱ΋͋Δ ܭଌܾͯ͠ΊΔ

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ͲͷΑ͏ʹ଎͘͢Δ͔ • ίϚϯυͦͷ΋ͷΛ଎͘͢Δ • cacheΛޮ͔ͤΔ • ґଘͷͳ͍εςʔδΛฒྻͰ࣮ߦ͢Δ • ඞཁͳ͍εςʔδΛbuild͠ͳ͍

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ґଘͷͳ͍εςʔδΛ ฒྻͰ࣮ߦ͢Δ

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buildkitΛ࢖͍ͬͯͩ͘͞ʂ github.com/moby/buildkit export DOCKER_BUILDKIT=1

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ͲͷΑ͏ʹ଎͘͢Δ͔ • ίϚϯυͦͷ΋ͷΛ଎͘͢Δ • cacheΛޮ͔ͤΔ • ґଘͷͳ͍εςʔδΛฒྻͰ࣮ߦ͢Δ • ඞཁͳ͍εςʔδΛbuild͠ͳ͍

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ඞཁͳ͍εςʔδΛ build͠ͳ͍

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͓ͦΒ͘buildkitͰͰ͖Δ͕ buildkit͕࢖͑ͳ͍৔߹ʹ

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github.com/orisano/targd • DockerﬁleͷASTΛऔಘ • ࢦఆ͞ΕͨεςʔδͷґଘεςʔδΛநग़ • ґଘεςʔδ͚ͩͷDockerﬁleΛग़ྗ

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github.com/orisano/targd

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ͲͷΑ͏ʹ଎͘͢Δ͔ ͲͷΑ͏ʹখ͘͢͞Δ͔

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ͲͷΑ͏ʹখ͘͢͞Δ͔ • multi stage buildΛ࢖͏ • RUNΛ·ͱΊΔ(?) • ͳͥେ͖͍͔Λ஌Δ

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ͲͷΑ͏ʹখ͘͢͞Δ͔ • multi stage buildΛ࢖͏ • RUNΛ·ͱΊΔ(?) • ͳͥେ͖͍͔Λ஌Δ

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multi stage buildΛ࢖͏

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multi stage buildʹ͍ͭͯ͸ ׂѪ

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multi stage buildͰ ͋Γ͕ͪͳٙ໰

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࠷ऴతͳΠϝʔδ͕ খ͘͞ͳΔ͔Β ͦΕ·Ͱͷεςʔδ͸ ࠷దԽ͠ͳͯ͘ྑ͍ʁ

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ݸਓతʹ͸No

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CI্Ͱbuild —cache-from Λ࢖͍ͬͯΔ৔߹ ࠷ऴεςʔδ͚ͩcache͢Δ ҙຯ͸ͳ͍

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moby/moby/issues/34715

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multi stage build࣌ʹ cacheΛޮ͔͍ͤͨ৔߹͸ લͷεςʔδ΋ ໌ࣔతʹpush͢Δ͔͠ͳ͍

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݁ہpush͢ΔͷͰ push/pullͷίετ͕͔͔Δ ͢΂ͯͷεςʔδΛฏ౳ʹ খ͘͢͞΂͖ (ݸਓͷݟղͰ͢)

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ͲͷΑ͏ʹখ͘͢͞Δ͔ • multi stage buildΛ࢖͏ • RUNΛ·ͱΊΔ(?) • ͳͥେ͖͍͔Λ஌Δ

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RUNΛ·ͱΊΔ(?)

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ͳΜͱͳ͘RUNΛ·ͱΊΔ ͱαΠζ͕খ͘͞ͳΔ (ͱࢥ͍ͬͯ·ͨ͠)

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github.com/orisano/minid • DockerﬁleͷASTΛऔಘ • ࿈ଓ͢ΔRUN, COPY, ADD, ENVΛ࿈݁͢Δ • ݁ՌͷDockerﬁleΛग़ྗ

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github.com/orisano/minid

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ϨΠϠʔͷΦʔόʔϔου͕ ݮΔ͔Βখ͘͞ͳΔʁ

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͍͍͑

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·ͣ Ͳ͏͍͏ܗͰอଘ͞ΕͯΔ͔ Λ஌Δ

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aufs / overlayfs2

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ετϨʔδυϥΠόʔͷ ৄࡉ͸ׂѪ

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େࡶ೺ʹݴ͏ͱίϚϯυຖʹ fsͷࠩ෼Λ͍࣋ͬͯΔ

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ͳͷͰRUNΛލ͍Ͱ ಉ͡ϑΝΠϧΛ͍͡Δͱ αΠζ͕ഒʹͳͬͨΓ͢Δ

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RUNΛލ͍Ͱ େ͖ͳҰ࣌ϑΝΠϧΛ ࡟আͯ͠΋ޮՌ͕ͳ͍

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ػցతʹ RUNΛ·ͱΊΔͷ͸ ޮՌ͕͋Δ

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ͲͷΑ͏ʹখ͘͢͞Δ͔ • multi stage buildΛ࢖͏ • RUNΛ·ͱΊΔ(?) • ͳͥେ͖͍͔Λ஌Δ

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ͳͥେ͖͍͔Λ஌Δ

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͍͔ͳΔνϡʔχϯάͰ΋ ܭଌͤͣʹ΍ͬͯ͸͍͚ͳ͍

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docker history

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docker history

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ͲͷϨΠϠʔ͕ େ͖͍͔͸Θ͔Δ͚Ͳ ͳͥେ͖͍͔͸෼͔ΓͮΒ͍

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github.com/orisano/dlayer • documentະ੔උ… Ӷҙ։ൃத • docker saveͰಘΒΕͨtarΛղੳ • layerͱcmdͷରԠΛͱΔ • layerͷࠩ෼ΛϑΝΠϧαΠζ͕େ͖͍ॱʹදࣔ

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github.com/orisano/dlayer

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࣮ࡍʹdlayerΛ࢖ͬͯ golangެࣜalpineΠϝʔδͷ αΠζΛݮΒͯ͠Έͨ

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docker-library/golang/pull/232

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·ͱΊ • ίϚϯυΛ଎͘Ͱ͖ͳ͍͔ߟ͑Δ • cacheΛཧղͯ͠༗ޮʹ׆͔͢ (CI or ϩʔΧϧ) • multi stage buildΛ࢖͏ (ॏ͍stageΛcache͢Δ) • layerΛখ͘͢͞ΔͨΊʹ෼ੳ͢Δ • buildkitΛ࢖͏!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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࡞ͬͨπʔϧ • github.com/orisano/rget • github.com/orisano/targd • github.com/orisano/minid • github.com/orisano/dlayer • ྑ͍ͱࢥͬͨΒελʔ͍͚ͯͨͩ͠ΔͱྭΈʹͳΓ·͢

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͓͢͢Ίͷࢿྉ • https://docs.docker.com/develop/develop- images/dockerﬁle_best-practices/ #dockerﬁle-instructions • https://cloud.google.com/solutions/best- practices-for-building-containers