Introduction to Docker

社内勉強会(2015/10/16)

Transcript

1. Introduction to
   Docker
   

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2. Why choose this
   topic?
   

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3. Big Wave Coming
   

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4. Big Wave in ࣾ಺
   • Docker swarmͷػӡ
   • Docker࣮ફೖ໳(Dockerຊ)ͷ޿·Γ
   • ๻ͷνʔϜʹDocker৬ਓ͕͍Δ
   

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5. Big Wave in the ੈք
   • Dockerʹؔ࿈༷ͨ͠ʑͳπʔϧͷొ৔
   • Docker Machine
   • Docker swarm
   • Docker compose
   

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6. ·͍ͣ
   

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7. Goal
   • Dockerͷಛ௃ɾར఺Λཧղ͢Δ͜ͱ
   • DockerfileΛॻ͍ͯϏϧυ͢Δ·Ͱͷ؆୯ͳྲྀΕΛཧղ͢Δ
   ͜ͱ
   • Dockerʹ͓͚ΔσΟεΫΠϝʔδ؅ཧػೳɾϓϩηε؅ཧ
   

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8. Dockerͷಛ௃ɾར఺Λ
   ཧղ͢Δ
   

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9. What is Docker?
   

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10. What is Docker?
    • Dockerࣾ ͕ΦʔϓϯιʔεͰެ։͍ͯ͠Δɺίϯςφٕज़ʹ
    ΑΔԾ૝Խιϑτ΢ΣΞ
    • LXC(Linux Container), AUFS(Another Union FS)
    • Vagrant౳ͱൺֱͯ͠ىಈ͕଎͍ɻ
    

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11. What is Container?
    

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12. ※
    ※ ը૾Ҿ༻ݩ: http://www.slideshare.net/TrisM/docker-41045742 P22
    

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13. Benefit
    • σϓϩΠ͕खܰʹͳΔ
    • εέʔϥϏϦςΟɾߴޮ཰ɾ൚༻ੑ
    

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14. Use Case
    • ΞϓϦέʔγϣϯ
    • DB
    • Ϗϧυ؀ڥ
    • ͍Ζ͍ΖͳΜͰ΋
    ※
    ※ ը૾Ҿ༻ݩ: http://www.slideshare.net/TrisM/docker-41045742 P22
    

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15. DockerfileΛॻ͍ͯϏϧ
    υ͢Δ·Ͱͷ؆୯ͳྲྀΕ
    Λཧղ͢Δ
    

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16. flow
    1. Dockerfileॻ͘
    2. Ϗϧυ͢Δ
    3. docker run͢Δ
    4. ϨδετϦ΁push
    

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17. 1. Dockerfileॻ͘
    FROM yukiyan_w/centos:centos6
    MAINTAINER Yuki Wakayama
    RUN yum -y install httpd
    RUN echo 'Hello, World!!' > /var/www/html/index.html
    ADD init.sh /usr/local/bin/init.sh
    RUN chmod u+x /usr/local/bin/init.sh
    CMD ["/usr/local/bin/init.sh"]
    

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18. #!/bin/bash
    service httpd start
    /bin/bash
    

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19. 2. Ϗϧυ͢Δ
    docker build -t yukiyan_w/apache:ver1.0 .
    Πϝʔδ͕Ͱ͖Δ
    docker@dev:~$ docker images
    REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE
    yukiyan_w/apache ver1.0 e0bd562a2d43 1 days ago 264.1 MB
    yukiyan_w/centos centos6 a005304e4e74 1 days ago 203.1 MB
    

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20. 3. docker run͢Δ
    docker run -itd -p 8000:80 --name apache01 yukiyan_w/apache:ver1.0
    ಈ͍ͯΔ͔֬ೝ
    docker@dev:~$ docker attach apache01
    [root@3a607e0dd9f9 /]# ps -ef
    UID PID PPID C STIME TTY TIME CMD
    root 1 0 0 15:09 ? 00:00:00 /bin/bash /usr/local/bin/init.sh
    root 17 1 0 15:09 ? 00:00:00 /usr/sbin/httpd
    root 19 1 0 15:09 ? 00:00:00 /bin/bash
    apache 20 17 0 15:09 ? 00:00:00 /usr/sbin/httpd
    apache 21 17 0 15:09 ? 00:00:00 /usr/sbin/httpd
    apache 22 17 0 15:09 ? 00:00:00 /usr/sbin/httpd
    root 36 19 0 15:10 ? 00:00:00 ps -ef
    

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21. 4. ϨδετϦ΁push
    docker push yukiyan_w/apache
    

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22. flow
    • Dockerfileॻ͘ɺϏϧυ͢Δɺ
    docker runɺ͍͡Δɺcommitɺtag
    ͚ͭΔɺϨδετϦ΁
    • DockerHub͔Βpull͢Δɺdocker
    runɺ͍͡Δɺcommitɺtag͚ͭΔɺ
    ϨδετϦ΁
    ※
    ※ ը૾Ҿ༻ݩ: http://www.slideshare.net/TrisM/docker-41045742 P22
    

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23. Cache for Faster Builds
    • Docker͸ΠϝʔδΛࠩ෼؅ཧͯ͠ΔͷͰϏϧυ͕ૣ͍
    

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24. docker build -t yukiyan_w/apache:ver1.0 .
    Step 0 : FROM yukiyan_w/centos:centos6
    centos6: Pulling from yukiyan_w/centos
    Status: Downloaded newer image for yukiyan_w/centos:centos6
    ---> a005304e4e74
    Step 1 : MAINTAINER Yuki Wakayama
    ---> Running in 0eec2e2e93d1
    ---> 2477c45cfa23
    Removing intermediate container 0eec2e2e93d1
    Step 2 : RUN yum -y install httpd
    ---> Running in 9dd64b9d2aeb
    ---> c09ed7b982db
    Removing intermediate container 9dd64b9d2aeb
    Step 3 : RUN echo 'Hello, World!!' > /var/www/html/index.html
    ---> Running in b8972fb573a7
    ---> 9cd9b8077c76
    Removing intermediate container b8972fb573a7
    Step 4 : ADD init.sh /usr/local/bin/init.sh
    ---> 998ad3b60ab3
    Removing intermediate container 23e41b8192c4
    Step 5 : RUN chmod u+x /usr/local/bin/init.sh
    ---> Running in 2be75c857f5c
    ---> 5726cae34e32
    Removing intermediate container 2be75c857f5c
    Step 6 : CMD /usr/local/bin/init.sh
    Successfully built e0bd562a2d4
    

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25. ͪΐͬͱม͑Δ
    FROM yukiyan_w/centos:centos6
    MAINTAINER Yuki Wakayama
    RUN yum -y install httpd
    RUN echo 'Hello, World!!' > /var/www/html/index.html
    ADD init.sh /usr/local/bin/init.sh
    RUN chmod u+x /usr/local/bin/init.sh
    + RUN echo 'Hello, World!!'
    CMD ["/usr/local/bin/init.sh"]
    

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26. Step 0 : FROM yukiyan_w/centos:centos6
    ---> a005304e4e74
    Step 1 : MAINTAINER Yuki Wakayama
    ---> Using cache
    ---> 2477c45cfa23
    Step 2 : RUN yum -y install httpd
    ---> Using cache
    ---> c09ed7b982db
    Step 3 : RUN echo 'Hello, World!!' > /var/www/html/index.html
    ---> Using cache
    ---> 9cd9b8077c76
    Step 4 : ADD init.sh /usr/local/bin/init.sh
    ---> Using cache
    ---> 998ad3b60ab3
    Step 5 : RUN chmod u+x /usr/local/bin/init.sh
    ---> Using cache
    ---> 5726cae34e32
    Step 6 : RUN echo 'Hello, World!!'
    ---> Running in 4191d60ea4b0
    Hello, World!!
    ---> c87043d1219f
    Removing intermediate container 4191d60ea4b0
    Step 7 : CMD /usr/local/bin/init.sh
    ---> Running in 52aef5dab4ce
    ---> 042133d33472
    Removing intermediate container 52aef5dab4ce
    Successfully built 042133d33472
    

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27. !
    

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28. But ⾠
    

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29. yum update໋ྩ΋Ωϟογϡ͞ΕΔͷͰ`--no-cacheͱ͔͠ͳ
    ͍ͱ࣍ճϏϧυ࣌ʹ࠷৽ͷঢ়ଶʹΞοϓσʔτ͞Εͳ͍
    

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30. Progress
    • Dockerͷಛ௃ɾར఺Λཧղ͢Δ͜ͱ Done ✅
    • DockerfileΛॻ͍ͯϏϧυ͢Δ·Ͱͷ؆୯ͳྲྀΕΛཧղ͢Δ
    ͜ͱ Done ✅
    • Dockerʹ͓͚ΔσΟεΫΠϝʔδ؅ཧػೳɾϓϩηε؅ཧ
    

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31. ਫΛҿΉ࣌ؒ !
    

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32. Dockerʹ͓͚ΔσΟεΫΠϝʔδ؅ཧ
    ػೳɾϓϩηε؅ཧ
    

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33. σΟεΫΠϝʔδ؅ཧػೳ
    

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34. ͖ͬ͞ɾɾɾ
    

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35. FROM yukiyan_w/centos:centos6
    MAINTAINER Yuki Wakayama
    RUN yum -y install httpd
    RUN echo 'Hello, World!!' > /var/www/html/index.html
    ADD init.sh /usr/local/bin/init.sh
    RUN chmod u+x /usr/local/bin/init.sh
    CMD ["/usr/local/bin/init.sh"]
    ↓
    docker build -t yukiyan_w/apache:ver1.0 .
    

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36. FROM yukiyan_w/centos:centos6
    DockerfileͰ͸ॻ͍ͯΔ͚ͲɺϏϧυ͸centos7Ͱߦͬͨ
    

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37. • ίϯςφ಺෦ͰCentOS6͕ήετOS
    ͱͯ͠ಈ͍ͯΔΘ͚Ͱ͸ͳ͍
    • ίϯςφ಺෦Ͱ͸CentOS6ͷ؀ڥͱ
    ಉ͡σΟεΫͷ಺༰͕ݟ͑Δ
    • CentOS6ͷσΟεΫʹೖͬͯΔόΠ
    φϦ/usr/sbin/httpd͔ΒσʔϞϯ
    ϓϩηεΛىಈ͢Δ
    ήετOSͷىಈϓϩηεΛলུͯ͠ɺ
    ໨తͷΞϓϦέʔγϣϯ͚ͩ௚઀ىಈ
    ͢Δ͜ͱ͕Ͱ͖Δ
    

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38. ͔ͩΒ଎͍
    

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39. Dockerʹ͓͚ΔσΟεΫΠϝʔδ؅ཧػೳ Doneɾϓϩηε؅
    ཧ
    

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40. ϓϩηε؅ཧ
    

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41. ෳ਺ཱͯͨίϯςφ͸ɺͦΕͧΕಠཱͨ͠ϓϩηεςʔϒϧ͕
    ׂΓ౰ͯΒΕΔ
    

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42. ͖ͬ͞ݴͬͨ
    ήετOSͷىಈϓϩηεΛলུͯ͠ɺ໨తͷΞϓϦέʔγϣϯ
    ͚ͩ௚઀ىಈ͢Δ͜ͱ͕Ͱ͖Δ
    

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43. ໨తͷΞϓϦέʔγϣϯ
    FROM yukiyan_w/centos:centos6
    MAINTAINER Yuki Wakayama
    RUN yum -y install httpd
    RUN echo 'Hello, World!!' > /var/www/html/index.html
    ADD init.sh /usr/local/bin/init.sh
    RUN chmod u+x /usr/local/bin/init.sh
    CMD ["/usr/local/bin/init.sh"]
    

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44. ήετOSͷىಈϓϩηεΛলུͯ͠ɺ໨తͷΞϓϦέʔγϣϯ
    ͚ͩ௚઀ىಈ͢Δ͜ͱ͕Ͱ͖Δ
    ↓
    ໨తͷΞϓϦέʔγϣϯ͕ PID=1 Ͱىಈ͞ΕͯΔ͸ͣ
    

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45. docker@dev:~$ docker run -itd -p 8000:80 --name apache01 yukiyan_w/apache:ver1.0
    docker@dev:~$ docker attach apache01
    [root@3a607e0dd9f9 /]# ps -ef
    UID PID PPID C STIME TTY TIME CMD
    root 1 0 0 15:09 ? 00:00:00 /bin/bash /usr/local/bin/init.sh
    root 17 1 0 15:09 ? 00:00:00 /usr/sbin/httpd
    root 19 1 0 15:09 ? 00:00:00 /bin/bash
    apache 20 17 0 15:09 ? 00:00:00 /usr/sbin/httpd
    apache 21 17 0 15:09 ? 00:00:00 /usr/sbin/httpd
    apache 22 17 0 15:09 ? 00:00:00 /usr/sbin/httpd
    root 36 19 0 15:10 ? 00:00:00 ps -ef
    Dockerfileͷ࠷ऴߦͷίϚϯυ͕PID=1Ͱಈ͍ͯΔʂʂ
    CMD ["/usr/local/bin/init.sh"]
    

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46. ϗετOS͔Βݟ͑Δϓϩηε
    docker@dev:~$ ps -ef
    UID PID PPID C STIME TTY TIME CMD
    ʙ(Ұ෦লུ)ʙ
    root 1019 1 0 06:14 ? 00:00:42 /usr/local/bin/docker daemonɹলུ
    root 9832 1019 0 16:54 ? 00:00:00 docker-proxy -proto tcp লུ
    root 9844 1019 0 16:54 pts/1 00:00:00 /bin/bash /usr/local/bin/init.sh
    root 9862 9844 0 16:54 ? 00:00:00 /usr/sbin/httpd
    root 9864 9844 0 16:54 pts/1 00:00:00 /bin/bash
    48 9865 9862 0 16:54 ? 00:00:00 /usr/sbin/httpd
    48 9867 9862 0 16:54 ? 00:00:00 /usr/sbin/httpd
    48 9868 9862 0 16:54 ? 00:00:00 /usr/sbin/httpd
    docker 9882 7689 0 16:54 pts/0 00:00:00 ps -ef
    ίϯςφͰಈ͍ͯΔϓϩηε͸ݟ͑Δ͚ͲɺPID͕ҧ͏ʂʂ
    

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48. Dockerʹ͓͚ΔσΟεΫΠϝʔδ؅ཧػೳ Doneɾϓϩηε؅
    ཧ Done
    

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49. Progress !
    • Dockerͷಛ௃ɾར఺Λཧղ͢Δ͜ͱ Done ✅
    • DockerfileΛॻ͍ͯϏϧυ͢Δ·Ͱͷ؆୯ͳྲྀΕΛཧղ͢Δ
    ͜ͱ Done ✅
    • Dockerʹ͓͚ΔσΟεΫΠϝʔδ؅ཧػೳɾϓϩηε؅ཧ
    Done ✅
    

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50. Summary
    

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51. Summary
    • Dockerͷಛ௃ɾར఺Λཧղ͢Δ͜ͱ
    • Vagrant౳ͱൺֱͯ͠ىಈ͕଎͍ɻ
    • ίϯςφͷ৔߹͸ɺԾ૝Ϛγϯ΍ήετOSͱ͍͏ߟ͑ํ
    ͸͋Γ·ͤΜɻ
    • σϓϩΠ͕खܰʹͳΔ
    • εέʔϥϏϦςΟɾߴޮ཰ɾ൚༻ੑ
    

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52. Summary
    • DockerfileΛॻ͍ͯϏϧυ͢Δ·Ͱͷ؆୯ͳྲྀΕΛཧղ͢Δ
    ͜ͱ
    1. Dockerfileॻ͘
    2. Ϗϧυ͢Δ
    3. docker run͢Δ
    4. ϨδετϦ΁push
    

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53. Summary
    • Dockerʹ͓͚ΔσΟεΫΠϝʔδ؅ཧػೳɾϓϩηε؅ཧ
    • ήετOSͷىಈϓϩηεΛলུͯ͠ɺ໨తͷΞϓϦέʔ
    γϣϯ͚ͩ௚઀ىಈ͢Δ͜ͱ͕Ͱ͖Δ
    • ϗετOS͔Β͸ίϯςφͷϓϩηε͕ݟ͑Δ͚Ͳɺίϯ
    ςφ͔ΒϗετOSͷϓϩηε͸ݟ͑ͳ͍
    

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54. Next time...
    • Ԡ༻తͳ෦෼
    • σʔλͷӬଓԽ
    • ؂ࢹɺϩΪϯά
    • ωοτϫʔΫ
    • पลٕज़
    • swarm, compose
    • k8s, ECS
    

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55. Build, Run, Enjoy !
    

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56. Thanks for listening!
    

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