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Dockerfileを素早く書くtips&ライブデモ
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Mitsuki Ogasahara
October 21, 2016
Technology
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1.8k
Dockerfileを素早く書くtips&ライブデモ
2016/10/21 JX通信社の社内勉強会で話した内容です
Mitsuki Ogasahara
October 21, 2016
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Transcript
@yamitzky %PDLFSpMFΛ ૉૣ͘࡞Δ UJQTˍϥΠϒσϞ 2016/10/21 JXࣾษڧձ
w ͕ࣗ%PDLFSpMFΛॻ͘ͱ͖ʹɺ Ͳ͏͍͏ڥͰॻ͍͍ͯΔ͔Λڞ༗ˍσϞ͠·͢ w ʮ͜͏͢Δͱͬͱޮྑ͍ΑʂʯͳͲ͋ͬͨΒ ϚαΧϦ͓ئ͍͠·͢ Today…
w ίϯςφܕͷԾԽڥΛఏڙ͢Δ044 w %PDLFSpMFʹΑͬͯ%PDLFSΠϝʔδΛఆٛͰ͖Δ w Ϗϧυͨ͠%PDLFSΠϝʔδ%PDLFS3FHJTUSZͰެ։Ͱ͖ɺ ଞͷڥͰ͑ΔΑ͏ʹڞ༗Ͱ͖Δ What is Docker?
%PDLFSpMFΛॻ͍ͯɺ ΞϓϦέʔγϣϯΛ୭Ͱ͑ΔΑ͏ʹ͠Α͏ʂ
w ࠷͕ۙࣗॻ͍ͨ%PDLFSpMF w EPDLFSDPNQPTF w BQFY w NFDBC w +6."/
w FUDʜ Recently… %PDLFSΠϝʔδΛڞ༗͢Ε AEPDLFSSVOA͚ͩͰ.BDͰ8JOEPXTͰ-JOVYͰ ར༻Ͱ͖ΔΑ͏ʹʂ
#BE1SBDUJDF
Bad Practice to Write Dockerfile $ 5FSNJOBM
Bad Practice to Write Dockerfile $ vim Dockerfile 0QFOFEJUPS
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
Bad Practice to Write Dockerfile $ docker build . #VJME%PDLFSJNBHFBOEXBJUʜ
... (wait for 10 min)
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
None
Bad Iteration $ build ☕ 8SJUF #VJME8BJU &SSPS
#FTU1SBDUJDF
Best Practice to Write Dockerfile 5NVYɺ7JNɺ4MJNFΛͬͯ Ұߦͣͭ%PDLFSpMFΛ͔֬ΊΔ Ҏ্ɻ
%&.0
Best Practice to Write Dockerfile $ 3VOUNVYTQMJUQBOF $
Best Practice to Write Dockerfile $ vim Dockerfile $ docker
run -it alpine /bin/sh &EJU%PDLFSpMF 3VOCBTFJNBHF`TTIFMM
Best Practice to Write Dockerfile / # 8SJUFKVTUPOFMJOF FROM alpine
RUN apk add —no-cache curl 4IFMMJTSVOOJOH
Best Practice to Write Dockerfile / # apk add —no-cache
curl &YFDVUFPOFMJOFWJB4-*.& FROM alpine RUN apk add —no-cache curl
w ʮWJNTMJNFʯͱ͔ʮFNBDTTMJNFʯͰݕࡧʂ w ΤσΟλʔͷબ෦ΛɺUNVYͷผQBOFʹૹΓɺ ࣮ߦͰ͖ΔϓϥάΠϯ Slime? IUUQTHJUIVCDPNKQBMBSEZWJNTMJNF
Best Practice to Write Dockerfile / # apk add —no-cache
curl &YFDVUFPOFMJOFWJB4-*.& FROM alpine RUN apk add —no-cache curl
/ # some command Best Practice to Write Dockerfile /
# apk add —no-cache curl … &YFDVUFPOFMJOFWJB4-*.& FROM alpine RUN apk add —no-cache curl RUN some command
/ # 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
Finally… $ docker build . 4BWFCVJMEJU $ ... ... Successfully
built
w UNVYͱWJNͱTMJNFΛ༻ҙ͢Δ w ҰߦͣͭTMJNFͰ࣮ߦ͔ͯ͠Βɺ࠷ޙʹAEPDLFSCVJMEA w λʔϛφϧʹ̍ߦͣͭίʔυΛૹΕΕԿͰྑ͍Αʂ ྫɿFNBDTTMJNFͱ͔JOUFMMJ+ͱ͔ Conclusion