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Docker Multi Stage Builds
Human Talks Grenoble octobre 2017 | @_crev_
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Human Talks Grenoble octobre 2017 | @_crev_
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- Images plus légères
- Unique fichier de build
Human Talks Grenoble octobre 2017 | @_crev_
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Pourquoi plus légères
Human Talks Grenoble octobre 2017 | @_crev_
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push, pull, run
Human Talks Grenoble octobre 2017 | @_crev_
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container != virtualisation légère
Human Talks Grenoble octobre 2017 | @_crev_
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Étapes de fabrication :
Compilation des dépendances
Traitements intermédiaires
Image cible
Human Talks Grenoble octobre 2017 | @_crev_
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Examples
Human Talks Grenoble octobre 2017 | @_crev_
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Simple Docker
FROM golang
WORKDIR /go/src/app
COPY . .
RUN go-wrapper download
RUN go-wrapper install
CMD ["go-wrapper", "run"]
737MB
Human Talks Grenoble octobre 2017 | @_crev_
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Pattern Builder
FROM golang
WORKDIR /go/src/ht_docker_multi_stage
COPY . .
RUN go-wrapper download
CMD ["go", "build", "-v"]
FROM gcr.io/distroless/base
COPY ht_docker_multi_stage /
CMD ["/ht_docker_multi_stage"]
Human Talks Grenoble octobre 2017 | @_crev_
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Pattern Builder (2)
build:
docker build -t ht_build_and_package-builder -f Dockerfile.build .
docker run --rm -v $$PWD:/go/src/ht_docker_multi_stage \
ht_build_and_package-builder
17.5MB
Human Talks Grenoble octobre 2017 | @_crev_
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Multi Stage
FROM golang as builder
WORKDIR /go/src/ht_docker_multi_stage
COPY . .
RUN go-wrapper download
RUN go-wrapper install
FROM gcr.io/distroless/base
COPY --from=builder /go/bin/ht_docker_multi_stage /
CMD ["/ht_docker_multi_stage"]
17.5MB
Human Talks Grenoble octobre 2017 | @_crev_
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NGinx
FROM nginx:1.13-alpine
EXPOSE 80
COPY conf/default.conf /etc/nginx/conf.d/default.conf
COPY build/ /usr/share/nginx/html
Human Talks Grenoble octobre 2017 | @_crev_
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React build
FROM node:8-alpine as dependencies
WORKDIR /usr/src/app
COPY package.json yarn.lock /usr/src/app/
RUN yarn install
FROM node:8-alpine as builder
WORKDIR /usr/src/app
COPY . .
COPY --from=dependencies /usr/src/app/node_modules /usr/src/app/node_modules
RUN yarn build
FROM nginx:1.13-alpine
EXPOSE 80
COPY conf/default.conf /etc/nginx/conf.d/default.conf
COPY --from=builder /usr/src/app/build/ /usr/share/nginx/html
Human Talks Grenoble octobre 2017 | @_crev_
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Sass build
FROM ruby:2-alpine3.6 as sass
RUN apk add --no-cache --virtual build-dep build-base \
&& gem install sass --no-doc \
&& apk del build-dep && rm -rf /var/cache/apk/*
COPY scss /usr/src/app
WORKDIR /usr/src/app
RUN sass bootstrap.scss > App.css
#...
FROM node:8-alpine as builder
WORKDIR /usr/src/app
COPY . .
COPY --from=dependencies /usr/src/app/node_modules /usr/src/app/node_modules
COPY --from=sass /usr/src/app/App.css /usr/src/app/src/App.css
RUN yarn build
Human Talks Grenoble octobre 2017 | @_crev_
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Limites
Human Talks Grenoble octobre 2017 | @_crev_
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Limites
Pas de partage de stag
Linter pas à jour
Docker >= 17.05
Human Talks Grenoble octobre 2017 | @_crev_
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Limites
Pas de partage de stag
Comment partager dependencie entre container de dev et container
intermédiaire de prod ?
Partage de step au travers du cache docker ?
Génération des Dockerfile ?
Human Talks Grenoble octobre 2017 | @_crev_
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Limites
Linter pas à jour
$ docker run --rm -it --privileged -v $PWD:/root/ \
projectatomic/dockerfile-lint dockerfile_lint lint
--------ERRORS---------
Line 1: -> FROM ruby:2-alpine3.6 as sass
ERROR: Invalid parameters for command..
Reference -> https://docs.docker.com/engine/reference/builder/
Line 12: -> FROM node:8-alpine as dependencies
ERROR: Invalid parameters for command..
Reference -> https://docs.docker.com/engine/reference/builder/
Human Talks Grenoble octobre 2017 | @_crev_
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Limites
Docker >= 17.05
Kubernetes < 1.8 docker <= 1.12
Human Talks Grenoble octobre 2017 | @_crev_
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Avantages
Human Talks Grenoble octobre 2017 | @_crev_
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Avantages
Toute la construction présente dans un unique chier
Suppression d'outils de build externes (type Makefile )
docker build + docker run , that's all folks
Human Talks Grenoble octobre 2017 | @_crev_
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Thanks
Human Talks Grenoble octobre 2017 | @_crev_ | docker run --rm -it squarescale/ybrissaud