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@yamitzky %PDLFSpMFΛ ૉૣ͘࡞Δ
 UJQTˍϥΠϒσϞ 2016/10/21 JXࣾ಺ษڧձ

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w ࣗ෼͕%PDLFSpMFΛॻ͘ͱ͖ʹɺ
 Ͳ͏͍͏؀ڥͰॻ͍͍ͯΔ͔Λڞ༗ˍσϞ͠·͢ w ʮ͜͏͢Δͱ΋ͬͱޮ཰ྑ͍ΑʂʯͳͲ͋ͬͨΒ
 ϚαΧϦ͓ئ͍͠·͢ Today…

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w ίϯςφܕͷԾ૝Խ؀ڥΛఏڙ͢Δ044 w %PDLFSpMFʹΑͬͯ%PDLFSΠϝʔδΛఆٛͰ͖Δ w Ϗϧυͨ͠%PDLFSΠϝʔδ͸%PDLFS3FHJTUSZͰެ։Ͱ͖ɺ
 ଞͷ؀ڥͰ΋࢖͑ΔΑ͏ʹڞ༗Ͱ͖Δ What is Docker? %PDLFSpMFΛॻ͍ͯɺ ΞϓϦέʔγϣϯΛ୭Ͱ΋࢖͑ΔΑ͏ʹ͠Α͏ʂ

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w ࠷ۙࣗ෼͕ॻ͍ͨ%PDLFSpMF w EPDLFSDPNQPTF w BQFY w NFDBC w +6."/ w FUDʜ Recently… %PDLFSΠϝʔδΛڞ༗͢Ε͹
 AEPDLFSSVOA͚ͩͰ.BDͰ΋8JOEPXTͰ΋-JOVYͰ΋ ར༻Ͱ͖ΔΑ͏ʹʂ

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#BE1SBDUJDF

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Bad Practice to Write Dockerfile $ 5FSNJOBM

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Bad Practice to Write Dockerfile $ vim Dockerfile 0QFOFEJUPS

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Bad Practice to Write Dockerfile FROM alpine RUN apk add —no-cache curl RUN command to take long time RUN some typo command 8SJUF%PDLFSpMF

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Bad Practice to Write Dockerfile $ docker build . #VJME%PDLFSJNBHFBOEXBJUʜ ... (wait for 10 min)

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Bad Practice to Write Dockerfile $ docker build . &SSPS ... ... /bin/sh: typo: not found The command '/bin/sh -c typo' returned a non-zero code: 127

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No content

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Bad Iteration $ build ☕ 8SJUF #VJME8BJU &SSPS

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#FTU1SBDUJDF

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Best Practice to Write Dockerfile 5NVYɺ7JNɺ4MJNFΛ࢖ͬͯ Ұߦͣͭ%PDLFSpMFΛ͔֬ΊΔ Ҏ্ɻ

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%&.0

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Best Practice to Write Dockerfile $ 3VOUNVYTQMJUQBOF $

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Best Practice to Write Dockerfile $ vim Dockerfile $ docker run -it alpine /bin/sh &EJU%PDLFSpMF 3VOCBTFJNBHF`TTIFMM

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Best Practice to Write Dockerfile / # 8SJUFKVTUPOFMJOF FROM alpine RUN apk add —no-cache curl 4IFMMJTSVOOJOH

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Best Practice to Write Dockerfile / # apk add —no-cache curl &YFDVUFPOFMJOFWJB4-*.& FROM alpine RUN apk add —no-cache curl

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w ʮWJNTMJNFʯͱ͔ʮFNBDTTMJNFʯͰݕࡧʂ w ΤσΟλʔͷબ୒෦෼ΛɺUNVYͷผQBOFʹૹΓɺ
 ࣮ߦͰ͖ΔϓϥάΠϯ
 Slime? IUUQTHJUIVCDPNKQBMBSEZWJNTMJNF

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Best Practice to Write Dockerfile / # apk add —no-cache curl &YFDVUFPOFMJOFWJB4-*.& FROM alpine RUN apk add —no-cache curl

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/ # some command Best Practice to Write Dockerfile / # apk add —no-cache curl … &YFDVUFPOFMJOFWJB4-*.& FROM alpine RUN apk add —no-cache curl RUN some command

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/ # some command … Best Practice to Write Dockerfile / # apk add —no-cache curl … &YFDVUFPOFMJOFWJB4-*.& FROM alpine RUN apk add —no-cache curl RUN some command RUN other command / # other command

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Finally… $ docker build . 4BWFCVJMEJU $ ... ... Successfully built

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w UNVYͱWJNͱTMJNFΛ༻ҙ͢Δ w ҰߦͣͭTMJNFͰ࣮ߦ͔ͯ͠Βɺ࠷ޙʹAEPDLFSCVJMEA w λʔϛφϧʹ̍ߦͣͭίʔυΛૹΕΕ͹ԿͰ΋ྑ͍Αʂ
 ྫɿFNBDTTMJNFͱ͔JOUFMMJ+ͱ͔ Conclusion