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docker build battle
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orisano
September 03, 2018
Programming
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docker build battle
orisano
September 03, 2018
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Transcript
Docker Build Battle Docker Meetup Tokyo #25 LT #dockertokyo @orisano
Docker buildʹԿΛٻΊΔ͔
buildࣗମΛߴʹʂ ग़ྗ͞ΕΔimageΛখ͘͞ʂ
imageΛখ͘͢͞Δͷ docker push͢Δͱ͖ͷ docker pull͢Δͱ͖ͷ ͷߴԽʹͭͳ͕Δ
ࠓ͍ͨ͜͠ͱ
ͲͷΑ͏ʹ͘͢Δ͔ ͲͷΑ͏ʹখ͘͢͞Δ͔
ͲͷΑ͏ʹ͘͢Δ͔ ͲͷΑ͏ʹখ͘͢͞Δ͔
ͲͷΑ͏ʹ͘͢Δ͔ • ίϚϯυͦͷͷΛ͘͢Δ • cacheΛޮ͔ͤΔ • ґଘͷͳ͍εςʔδΛฒྻͰ࣮ߦ͢Δ • ඞཁͳ͍εςʔδΛbuild͠ͳ͍
ͲͷΑ͏ʹ͘͢Δ͔ • ίϚϯυͦͷͷΛ͘͢Δ • cacheΛޮ͔ͤΔ • ґଘͷͳ͍εςʔδΛฒྻͰ࣮ߦ͢Δ • ඞཁͳ͍εςʔδΛbuild͠ͳ͍
ίϚϯυͦͷͷΛ͘͢Δ
͘Ͱ͖ΔίϚϯυ͋Δ
Α͘ૺ۰͢Δ ͘Ͱ͖ΔίϚϯυ
GitHub͔Β࣮ߦϑΝΠϧΛ curl or wgetͰऔಘ͢Δ
GitHub ReleaseS3 S3Rangeϔομʔ͕͑Δ
ͭ·Γ ฒྻμϯϩʔυ͕Մೳ
github.com/orisano/rget
None
ڥʹΑΓ·͕͢ 5min -> 2min
ͲͷΑ͏ʹ͘͢Δ͔ • ίϚϯυͦͷͷΛ͘͢Δ • cacheΛޮ͔ͤΔ • ґଘͷͳ͍εςʔδΛฒྻͰ࣮ߦ͢Δ • ඞཁͳ͍εςʔδΛbuild͠ͳ͍
cacheΛޮ͔ͤΔ
docker build͢ΔϚγϯ͕ ಉҰͷ߹ ಉҰͰͳ͍߹
docker build͢ΔϚγϯ͕ ಉҰͷ߹ ಉҰͰͳ͍߹
cacheͷΈΛཧղ͢Δ
RUN จࣈྻ͕มΘΒͳ͍ݶΓ جຊతʹcache͞ΕΔ
COPY, ADD͢ΔϑΝΠϧͷ ༰͕มΘͬͨ߹ Ҏ߱ͷRUNͷcache͕ഁغ
ͳͷͰ lockfileͳͲΛઌʹίϐʔͯ͠ install͚ͩͯ͠cacheͤ͞Δ
None
None
docker build͢ΔϚγϯ͕ ಉҰͷ߹ ಉҰͰͳ͍߹
CI্Ͱbuild͢Δͱ͖ͳͲ cache͕ͳ͍͜ͱ͕ଟ͍
docker save & load or docker pull docker build —cache-from
Λ͏
image͕େ͖͍/layer͕ଟ͍ ߹ buildͷ΄͏͕ૣ͍͜ͱ͋Δ
image͕େ͖͍/layer͕ଟ͍ ߹ buildͷ΄͏͕ૣ͍͜ͱ͋Δ ܭଌܾͯ͠ΊΔ
ͲͷΑ͏ʹ͘͢Δ͔ • ίϚϯυͦͷͷΛ͘͢Δ • cacheΛޮ͔ͤΔ • ґଘͷͳ͍εςʔδΛฒྻͰ࣮ߦ͢Δ • ඞཁͳ͍εςʔδΛbuild͠ͳ͍
ґଘͷͳ͍εςʔδΛ ฒྻͰ࣮ߦ͢Δ
buildkitΛ͍ͬͯͩ͘͞ʂ github.com/moby/buildkit export DOCKER_BUILDKIT=1
ͲͷΑ͏ʹ͘͢Δ͔ • ίϚϯυͦͷͷΛ͘͢Δ • cacheΛޮ͔ͤΔ • ґଘͷͳ͍εςʔδΛฒྻͰ࣮ߦ͢Δ • ඞཁͳ͍εςʔδΛbuild͠ͳ͍
ඞཁͳ͍εςʔδΛ build͠ͳ͍
͓ͦΒ͘buildkitͰͰ͖Δ͕ buildkit͕͑ͳ͍߹ʹ
github.com/orisano/targd • DockerfileͷASTΛऔಘ • ࢦఆ͞ΕͨεςʔδͷґଘεςʔδΛநग़ • ґଘεςʔδ͚ͩͷDockerfileΛग़ྗ
github.com/orisano/targd
ͲͷΑ͏ʹ͘͢Δ͔ ͲͷΑ͏ʹখ͘͢͞Δ͔
ͲͷΑ͏ʹখ͘͢͞Δ͔ • multi stage buildΛ͏ • RUNΛ·ͱΊΔ(?) • ͳͥେ͖͍͔ΛΔ
ͲͷΑ͏ʹখ͘͢͞Δ͔ • multi stage buildΛ͏ • RUNΛ·ͱΊΔ(?) • ͳͥେ͖͍͔ΛΔ
multi stage buildΛ͏
multi stage buildʹ͍ͭͯ ׂѪ
multi stage buildͰ ͋Γ͕ͪͳٙ
࠷ऴతͳΠϝʔδ͕ খ͘͞ͳΔ͔Β ͦΕ·Ͱͷεςʔδ ࠷దԽ͠ͳͯ͘ྑ͍ʁ
None
ݸਓతʹNo
CI্Ͱbuild —cache-from Λ͍ͬͯΔ߹ ࠷ऴεςʔδ͚ͩcache͢Δ ҙຯͳ͍
moby/moby/issues/34715
multi stage build࣌ʹ cacheΛޮ͔͍ͤͨ߹ લͷεςʔδ ໌ࣔతʹpush͢Δ͔͠ͳ͍
݁ہpush͢ΔͷͰ push/pullͷίετ͕͔͔Δ ͯ͢ͷεςʔδΛฏʹ খ͖͘͢͞ (ݸਓͷݟղͰ͢)
ͲͷΑ͏ʹখ͘͢͞Δ͔ • multi stage buildΛ͏ • RUNΛ·ͱΊΔ(?) • ͳͥେ͖͍͔ΛΔ
RUNΛ·ͱΊΔ(?)
ͳΜͱͳ͘RUNΛ·ͱΊΔ ͱαΠζ͕খ͘͞ͳΔ (ͱࢥ͍ͬͯ·ͨ͠)
github.com/orisano/minid • DockerfileͷASTΛऔಘ • ࿈ଓ͢ΔRUN, COPY, ADD, ENVΛ࿈݁͢Δ • ݁ՌͷDockerfileΛग़ྗ
github.com/orisano/minid
ϨΠϠʔͷΦʔόʔϔου͕ ݮΔ͔Βখ͘͞ͳΔʁ
͍͍͑
·ͣ Ͳ͏͍͏ܗͰอଘ͞ΕͯΔ͔ ΛΔ
aufs / overlayfs2
ετϨʔδυϥΠόʔͷ ৄࡉׂѪ
େࡶʹݴ͏ͱίϚϯυຖʹ fsͷࠩΛ͍࣋ͬͯΔ
ͳͷͰRUNΛލ͍Ͱ ಉ͡ϑΝΠϧΛ͍͡Δͱ αΠζ͕ഒʹͳͬͨΓ͢Δ
RUNΛލ͍Ͱ େ͖ͳҰ࣌ϑΝΠϧΛ আͯ͠ޮՌ͕ͳ͍
ػցతʹ RUNΛ·ͱΊΔͷ ޮՌ͕͋Δ
ͲͷΑ͏ʹখ͘͢͞Δ͔ • multi stage buildΛ͏ • RUNΛ·ͱΊΔ(?) • ͳͥେ͖͍͔ΛΔ
ͳͥେ͖͍͔ΛΔ
͍͔ͳΔνϡʔχϯάͰ ܭଌͤͣʹ͍͚ͬͯͳ͍
docker history
docker history
ͲͷϨΠϠʔ͕ େ͖͍͔Θ͔Δ͚Ͳ ͳͥେ͖͍͔͔ΓͮΒ͍
github.com/orisano/dlayer • documentະඋ… Ӷҙ։ൃத • docker saveͰಘΒΕͨtarΛղੳ • layerͱcmdͷରԠΛͱΔ •
layerͷࠩΛϑΝΠϧαΠζ͕େ͖͍ॱʹදࣔ
github.com/orisano/dlayer
࣮ࡍʹdlayerΛͬͯ golangެࣜalpineΠϝʔδͷ αΠζΛݮΒͯ͠Έͨ
docker-library/golang/pull/232
None
·ͱΊ • ίϚϯυΛ͘Ͱ͖ͳ͍͔ߟ͑Δ • cacheΛཧղͯ͠༗ޮʹ׆͔͢ (CI or ϩʔΧϧ) • multi
stage buildΛ͏ (ॏ͍stageΛcache͢Δ) • layerΛখ͘͢͞ΔͨΊʹੳ͢Δ • buildkitΛ͏!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
࡞ͬͨπʔϧ • github.com/orisano/rget • github.com/orisano/targd • github.com/orisano/minid • github.com/orisano/dlayer •
ྑ͍ͱࢥͬͨΒελʔ͍͚ͯͨͩ͠ΔͱྭΈʹͳΓ·͢
͓͢͢Ίͷࢿྉ • https://docs.docker.com/develop/develop- images/dockerfile_best-practices/ #dockerfile-instructions • https://cloud.google.com/solutions/best- practices-for-building-containers