Docker マルチステージビルドで幸せコンテナライフ / Understanding docker's multi-stage builds

Docker v17.05 から導入された multi-stage builds 機能とは何か、どんな問題を解決するためのものなのかをまとめました.

Presented at Docker Tokyo.

Transcript

1. SUPINF Inc. // twitter.com/toricls multi-stage builds Yasuhiro HARA May 23, 2017
2. SUPINF Inc. // twitter.com/toricls multi-stage builds (v17.05~)
3. SUPINF Inc. // twitter.com/toricls Multi-stage builds ୘ٵƛǷȏǭǗȗǪǑǝǬ೐Ɣ
   ǹDžLjȏƛƱƷ΂ƷŹƔźƸݮ੧
4. SUPINF Inc. // twitter.com/toricls # Artifacts Builder FROM golang:1.8.2 AS builder WORKDIR /go/src/github.com/toricls/repos COPY app.go . RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o app . # Runner FROM scratch COPY --from=builder /go/src/github.com/toricls/repos/app / CMD ["/app"] multi-stage builds ./Dockerfile
5. SUPINF Inc. // twitter.com/toricls # Artifacts Builder FROM golang:1.8.2 AS builder WORKDIR /go/src/github.com/toricls/repos COPY app.go . RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o app . # Runner FROM scratch COPY --from=builder /go/src/github.com/toricls/repos/app / CMD ["/app"] multi-stage builds 1 Ƒƛ Dockerfile ˰ƘґϺƆƸ 2 ƑƛǷȏǭǗȗǪǑǝǬ
6. SUPINF Inc. // twitter.com/toricls Multi-stage builds ୘ٵƛǷȏǭǗȗǪǑǝǬ೐ƛ
   ʓґ֕ƿ৤इƘ୴మƂƈƓżƹƸݮ੧
7. SUPINF Inc. // twitter.com/toricls multi-stage builds https://www.slideshare.net/Docker/dockercon-2017-general-session-day-1-solomon-hykes-75362520
8. SUPINF Inc. // twitter.com/toricls multi-stage builds Ɩƹżƶű౐ųƛ෇
9. SUPINF Inc. // twitter.com/toricls FROM golang:1.8.2 WORKDIR /go/src/github.com/toricls/repos RUN go get -d -v github.com/pkg/errors COPY app.go . RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o app . CMD ["./app"] Ɩƹżƶű۪̌ȥŹƷƛLjȅȜǜǙLjǞƘ౐űŹůƸŸ FROM golang:1.8.2 AS builder WORKDIR /go/src/github.com/toricls/repos RUN go get -d -v github.com/pkg/errors COPY app.go . RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o app . FROM scratch COPY --from=builder /go/src/github.com/ toricls/repos/app / CMD ["/app"] ڰ఻ƘǷȏǭƄƌƱƑ multi-stage builds
   ƄƌƱƑ
10. SUPINF Inc. // twitter.com/toricls FROM golang:1.8.2 WORKDIR /go/src/github.com/toricls/repos RUN go get -d -v github.com/pkg/errors COPY app.go . RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o app . CMD ["./app"] Ɩƹżƶű۪̌ȥŹƷƛLjȅȜǜǙLjǞƘ౐űŹůƸŸ FROM golang:1.8.2 AS builder WORKDIR /go/src/github.com/toricls/repos RUN go get -d -v github.com/pkg/errors COPY app.go . RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o app . FROM scratch COPY --from=builder /go/src/github.com/ toricls/repos/app / CMD ["/app"] ڰ఻ƘǷȏǭƄƌƱƑ multi-stage build
    ƄƌƱƑ 
    + 
    +
11. SUPINF Inc. // twitter.com/toricls
12. SUPINF Inc. // twitter.com/toricls multi-stage builds
    ɪ̣ƛɛൂƛњ೗ƛދΒ
    
13. SUPINF Inc. // twitter.com/toricls ఍ಊƔࡒ൜ƛƗűLjȅȜǜƿʊƸ̵̰ (~v17.03)
14. SUPINF Inc. // twitter.com/toricls ఍ಊƔࡒ൜ƛƗűLjȅȜǜƿʊƸƌƮƛ̵̰
    \T ▶︎ ǽȜǝLjȅȜǜƿ఍ಊƘƆƸ
    ▶︎ Alpine Linux, Scratch... ▶︎ ࡒ൜ƗƯƛƿऊż ▶︎ ޠΙű
    ▶︎ Ƿȏǭࣄƕҩ଻ࣄƔ̘ƛLjȅȜǜƿʎų
15. SUPINF Inc. // twitter.com/toricls ఍ಊƔࡒ൜ƛƗűLjȅȜǜƿʊƸƌƮƛ̵̰
    \T ▶︎ ǽȜǝLjȅȜǜƿ఍ಊƘƆƸ
    ▶︎ Alpine Linux, Scratch... ▶︎ ࡒ൜ƗƯƛƿऊż ▶︎ ޠΙű
    ▶︎ Ƿȏǭࣄƕҩ଻ࣄƔ̘ƛLjȅȜǜƿʎų ࡽƘƀƀƘ
    ߦŽƫƄṵ̵̋Ź
16. SUPINF Inc. // twitter.com/toricls ఍ಊƔࡒ൜ƛƗűLjȅȜǜƿʊƸƌƮƛ̵̰
    \T Builder Pattern
17. SUPINF Inc. // twitter.com/toricls ఍ಊƔࡒ൜ƛƗűLjȅȜǜƿʊƸƌƮƛ̵̰
    \T Builder Pattern - Golang -
18. SUPINF Inc. // twitter.com/toricls ఍ಊƔࡒ൜ƛƗűLjȅȜǜƿʊƸƌƮƛ̵̰
    \T
    
    SGJBCP
    .?RRCPL
    %MJ?LE FROM golang:1.8.2 WORKDIR /go/src/github.com/toricls/repos RUN go get -d -v github.com/pkg/errors COPY app.go . RUN CGO_ENABLED=0 GOOS=linux \ go build -a -installsuffix cgo -o app . FROM scratch COPY app / CMD ["/app"] ./Dockerfile.build ./Dockerfile (ҩ଻ࣄ)
19. SUPINF Inc. // twitter.com/toricls ఍ಊƔࡒ൜ƛƗűLjȅȜǜƿʊƸƌƮƛ̵̰
    \T
    
    SGJBCP
    .?RRCPL
    %MJ?LE `Builder pattern` ƛҩࢨƘƜ
    Glue
    ǗȜǭࣶƗƯƛŹքୟ #!/bin/sh #!/bin/sh # Builder docker build -t my-image:builder . -f Dockerfile.build #!/bin/sh # Builder docker build -t my-image:builder . -f Dockerfile.build # Extract artifacts docker create --name artifacts my-image:builder #!/bin/sh # Builder docker build -t my-image:builder . -f Dockerfile.build # Extract artifacts docker create --name artifacts my-image:builder docker cp artifacts:/go/src/github.com/toricls/repos/app ./app #!/bin/sh # Builder docker build -t my-image:builder . -f Dockerfile.build # Extract artifacts docker create --name artifacts my-image:builder docker cp artifacts:/go/src/github.com/toricls/repos/app ./app docker rm -f artifacts #!/bin/sh # Builder docker build -t my-image:builder . -f Dockerfile.build # Extract artifacts docker create --name artifacts my-image:builder docker cp artifacts:/go/src/github.com/toricls/repos/app ./app docker rm -f artifacts # Build runtime image docker build --no-cache -t my-image:latest . -f Dockerfile
20. SUPINF Inc. // twitter.com/toricls ఍ಊƔࡒ൜ƛƗűLjȅȜǜƿʊƸƌƮƛ̵̰
    \T Go
    ƜǴLjǮȎ׼˥ƆƹƝűűƍƺųžƖ
    ɤƛ୭கƍƕƖųƄƓƌƛ෇
21. SUPINF Inc. // twitter.com/toricls ఍ಊƔࡒ൜ƛƗűLjȅȜǜƿʊƸƌƮƛƌƳƫƙ̵̰
    \T Builder Pattern - Ruby on Rails -
22. SUPINF Inc. // twitter.com/toricls FROM ruby:2.4.1-alpine # Install Runtime Packages libxslt, yaml, postgresql-client ... ఍ಊƔࡒ൜ƛƗűLjȅȜǜƿʊƸƌƮƛƌƳƫƙ̵̰
    \T
    
    SGJBCP
    .?RRCPL
    0S@W
    ML
    0?GJQ ./Dockerfile.base ./Dockerfile.builder ./Dockerfile.base.builder ./Dockerfile (ҩ଻ࣄ) FROM my-base:latest # Install Development Packages libxslt-dev, yaml-dev, postgresql-dev ... FROM my-base:latest WORKDIR /app COPY . /app CMD ["bundle", "exec", "rails", "server"... FROM my-base-builder:latest # Install Gems, Compile Assets ...
23. SUPINF Inc. // twitter.com/toricls FROM ruby:2.4.1-alpine # Install Runtime Packages ... FROM my-base:latest # Install Development Packages ... FROM my-base:latest WORKDIR /app COPY . /app CMD ["bundle", "exec", "rails", "server"... FROM my-base-builder:latest # Install Gems, Compile Assets ... ఍ಊƔࡒ൜ƛƗűLjȅȜǜƿʊƸƌƮƛƌƳƫƙ̵̰
    \T
    
    SGJBCP
    .?RRCPL
    0S@W
    ML
    0?GJQ ./Dockerfile.base ./Dockerfile.builder ./Dockerfile.base.builder ./Dockerfile
24. SUPINF Inc. // twitter.com/toricls multi-stage builds
25. SUPINF Inc. // twitter.com/toricls # Artifacts Builder FROM golang:1.8.2 AS builder WORKDIR /go/src/github.com/toricls/repos RUN go get -d -v github.com/pkg/errors COPY app.go . RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o app . # Runner FROM scratch COPY --from=builder /go/src/github.com/toricls/repos/app / CMD ["/app"] multi-stage builds ./Dockerfile
26. SUPINF Inc. // twitter.com/toricls ƫƕƮ multi-stage builds ƿȥ׮Ƙ̙ࣄƄƓ
    ఍ಊƔࡒ൜ƛƗűLjȅȜǜƿ
    ɟƫƔƵƷƯݓƘ
    ׮Ƙ˥ƹƫƄƴų
27. SUPINF Inc. // twitter.com/toricls References
28. SUPINF Inc. // twitter.com/toricls References ▶︎ Use multi-stage builds - Docker Documentation ▶︎ https://docs.docker.com/engine/userguide/eng-image/multistage-build/ ▶︎ Builder pattern vs. Multi-stage builds in Docker ▶︎ http://blog.alexellis.io/mutli-stage-docker-builds/
29. SUPINF Inc. // twitter.com/toricls Thank you :)