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

Transcript

1. @yamitzky
   %PDLFSpMFΛ
   ૉૣ͘࡞Δ

   UJQTˍϥΠϒσϞ
   2016/10/21 JXࣾ಺ษڧձ
   

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2. w ࣗ෼͕%PDLFSpMFΛॻ͘ͱ͖ʹɺ

   Ͳ͏͍͏؀ڥͰॻ͍͍ͯΔ͔Λڞ༗ˍσϞ͠·͢
   w ʮ͜͏͢Δͱ΋ͬͱޮ཰ྑ͍ΑʂʯͳͲ͋ͬͨΒ

   ϚαΧϦ͓ئ͍͠·͢
   Today…
   

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3. 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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4. 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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5. #BE1SBDUJDF
   

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6. Bad Practice to Write Dockerfile
   $
   5FSNJOBM
   

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7. Bad Practice to Write Dockerfile
   $ vim Dockerfile
   0QFOFEJUPS
   

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

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10. 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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12. Bad Iteration
    $ build
    ☕
    8SJUF #VJME8BJU &SSPS
    

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13. #FTU1SBDUJDF
    

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

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15. %&.0
    

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16. Best Practice to Write Dockerfile
    $
    3VOUNVYTQMJUQBOF
    $
    

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

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

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

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20. w ʮWJNTMJNFʯͱ͔ʮFNBDTTMJNFʯͰݕࡧʂ
    w ΤσΟλʔͷબ୒෦෼ΛɺUNVYͷผQBOFʹૹΓɺ

    ࣮ߦͰ͖ΔϓϥάΠϯ

    Slime?
    IUUQTHJUIVCDPNKQBMBSEZWJNTMJNF
    

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

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22. / # 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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23. / # 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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24. Finally…
    $ docker build .
    4BWFCVJMEJU
    $
    ...
    ...
    Successfully built
    

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25. w UNVYͱWJNͱTMJNFΛ༻ҙ͢Δ
    w ҰߦͣͭTMJNFͰ࣮ߦ͔ͯ͠Βɺ࠷ޙʹAEPDLFSCVJMEA
    w λʔϛφϧʹ̍ߦͣͭίʔυΛૹΕΕ͹ԿͰ΋ྑ͍Αʂ

    ྫɿFNBDTTMJNFͱ͔JOUFMMJ+ͱ͔
    
    Conclusion
    

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