Rails on Docker

2018/5/10の表参道.rbで発表した資料です。
#omotesandorb

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·͔ͭ͘͏
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