Rails on Docker

Transcript

1. Rails on Docker @bigplants May 10th 2018 @Omotesando.rb

2. Who am I ? • Daiki Hirakata (36) • Software

   Engineer • Main Programing Languages:
 PHP, Ruby • Primary interests:
 DevOps, Docker, Kubernetes, Microservice Architecture, GCP @bigplants

3. ࠷ۙϥϯχϯά͸͡Ί·ͨ͠

4. ͪΐͬͱ͚ͩએ఻

5. ઈࢍ։ൃऀืूதʂ • ϓϩμΫτ໊: ALL-IN • اۀ׆ಈͰඞཁͳશͯͷ πʔϧ͕ೖ͍ͬͯΔ • Rails, Angular,

   AWS • גࣜձࣾϏδωεόϯΫ άϧʔϓ

6. ݱࡏɺεςʔδϯά؀ڥΛ ઈࢍKubernetesҠߦதͰ͢ɻ

7. ϩʔυϚοϓ • ։ൃ༻ίϯςφ४උ • ެ։༻ίϯςφ४උ • GKEʹσϓϩΠ <- ΠϚίί •

   CI/CDύΠϓϥΠϯͷ੔උ
 ͍ͭͰ΋୭Ͱ΋͓खܰʹk8sΫϥελʹ؀ڥߏங&σ ϓϩΠͰ͖ΔΑ͏ʹ͢Δ

8. ໨ࢦͤʂ ແݶεςʔδϯάͷ࣮ݱʂ

9. ࠓ೔͸ެ։؀ڥ༻ͷ Rails on Docker ͳ࿩Λ͠·͢ɻ × ΄΅dockerͷ࿩Ͱ͢ɻɻ

10. Rails appΛ docker build͢Δͱ͖

11. ݁ߏ΍Δ͜ͱ͋Δ • bundle install • npm install • rake bower:install

    • rake bower:resolve • rake assets:precompile • And more tasks…

12. ނʹɺdocker buildʹ ͔͔࣌ؒΔ Լख͢Δͱover 10min

13. ߋʹΠϝʔδαΠζͷංେԽ Լख͢Δͱover 1.5GB

14. docker build͸1secͰ΋ૣ͍ ΄͏͕͍͍ git pushͷ౓ʹCIʹdocker build͍ͤͨ͞

15. docker image͸1MBͰ΋ܰ ͍΄͏͕͍͍ Google Container Registory΁ͷ ΞοϓϩʔυɺGKE΁ͷσϓϩΠʹӨڹ͢Δ

16. docker build docker push git push kubectl apply get image

17. docker build docker push git push kubectl apply get image

    Ϗϧυʹ͔͔࣌ؒΔͱ

18. docker build docker push git push kubectl apply get image

    ΠϝʔδͷαΠζ͕σΧΠͱ

19. Ϗϧυͷ࣌ؒΛ୹ॖ͢Δʹ͸ʁ

20. ΩϟογϡΛ͏·͔ͭ͘͏

21. None

22. ΠϝʔδͷαΠζΛ཈͑Δʹ ͸

23. ·ͣඞཁͳ΋ͷΛશ෦ೖΕΔ

24. ཁΒͳ͍΋ͷΛ࡟আ ಉ͡Dockerfile಺

25. ΋͏Ұ౓ίϐʔ ಉ͡Dockerfile಺

26. ͜ΕͰΠϝʔδͷαΠζ͕ 1.5GB -> 500MB͘Β͍ʹʂ ※͋͘·Ͱචऀͷ؀ڥͰͷ࿩Ͱ͢

27. Tips

28. docker buildͰ؀ڥม਺Λॻ ͖׵͑Δʹ͸

29. docker buildͰ͸ENVΛ౉ͤͳ ͍

30. --build-arg͕࢖͑ͦ͏

31. ARGͰENVΛॻ͖׵͑Δ • docker build --build-arg RAILS_ENV=production --build-arg HOGE=fuga

32. ARGͷҐஔ΋ॏཁ

33. ARGͷҐஔ΋ॏཁ

34. RUN಺Ͱ؀ڥม਺Λૢ࡞͢Δ΂ ͖Ͱͳ͍ • ͨͩͷshellͩͱ͍͏ࣄΛཧղ͢Δ

35. ϨΠϠ͕෼͔ΕΔͱͦΕͧΕ༰ྔΛ৯͏ɻͳΔ΂͘RUN͸·ͱΊΔ ͋ͱ͔Β࡟আͯ͠΋Πϝʔδα Πζ͸มΘΒͳ͍

36. ΋͘͠͸ɺ͖ͬ͞ग़͖ͯͨ Multi-stage buildͷςΫχο ΫͰ

37. docker history <image>ͰͲ ͜ͰαΠζ͕๲ΒΜͰΔ͔֬ೝ

38. σόοάͷͨΊʹ͍Βͳ͍΋ͷΛ࡟আ͢Δ લͷঢ়ଶͰ֬ೝͰ͖ΔΑ͏ʹεςʔδΛΘ ͚Δ • docker build --target <stage name> -t

    <tag>

39. ࠓ೔ͷ·ͱΊ • Ϗϧυߴ଎ԽͷҝʹΩϟογϡΛ͏·͘࢖͓ ͏ • ΠϝʔδαΠζͷѹॖͷͨΊʹMulti-stage build͠Α͏