tl;dr
- Multi Stage Buildを利用することで147MBほど減った。
- 今回は開発環境のDocker化が目的。production環境ではSSG or SSRだと思うのでまた別の対応が必要になりそう。
Example Project
完成形
Multi Stage Buildを利用しないケース
$ docker build -f Dockerfile_dev . Sending build context to Docker daemon 139.6MB Step 1/9 : FROM node:12.18.2-alpine as builder ---> 057fa4cc38c2 Step 2/9 : WORKDIR /app ---> Running in f53a1b123569 Removing intermediate container f53a1b123569 ---> 485a44f0ebd3 Step 3/9 : COPY package.json . ---> 5b58fb396840 Step 4/9 : COPY yarn.lock . ---> 8fbd886ebe49 Step 5/9 : COPY tsconfig.json . ---> dd9ea9f86d64 Step 6/9 : RUN yarn install --production ---> Running in 997d0a1b080d yarn install v1.22.4 [1/4] Resolving packages... [2/4] Fetching packages... info fsevents@1.2.13: The platform "linux" is incompatible with this module. info "fsevents@1.2.13" is an optional dependency and failed compatibility check. Excluding it from installation. info fsevents@2.1.3: The platform "linux" is incompatible with this module. info "fsevents@2.1.3" is an optional dependency and failed compatibility check. Excluding it from installation. [3/4] Linking dependencies... [4/4] Building fresh packages... Done in 39.21s. Removing intermediate container 997d0a1b080d ---> df1be46b2ed3 Step 7/9 : COPY . . ---> d91d29256d71 Step 8/9 : EXPOSE 3000 ---> Running in f6db73858185 Removing intermediate container f6db73858185 ---> ef8b3ac6a59f Step 9/9 : CMD [ "yarn", "dev" ] ---> Running in 003480d5135e Removing intermediate container 003480d5135e ---> f9590e7cb54e Successfully built f9590e7cb54e
$ docker image ls | grep f9590e7cb54e <none> <none> f9590e7cb54e 16 seconds ago 431MB
431MB
Multi Stage Buildを利用するケース
$ docker build -f Dockerfile_dev . Sending build context to Docker daemon 139.6MB Step 1/11 : FROM node:12.18.2-alpine as builder ---> 057fa4cc38c2 Step 2/11 : WORKDIR /app ---> Using cache ---> 485a44f0ebd3 Step 3/11 : COPY package.json . ---> Using cache ---> 5b58fb396840 Step 4/11 : COPY yarn.lock . ---> Using cache ---> 8fbd886ebe49 Step 5/11 : COPY tsconfig.json . ---> Using cache ---> dd9ea9f86d64 Step 6/11 : RUN yarn install --production ---> Using cache ---> df1be46b2ed3 Step 7/11 : FROM node:12.18.2-alpine ---> 057fa4cc38c2 Step 8/11 : COPY --from=builder /app/node_modules /app/node_modules ---> fd4d5616ed40 Step 9/11 : COPY . . ---> 8964cefa6942 Step 10/11 : EXPOSE 3000 ---> Running in 16526606b919 Removing intermediate container 16526606b919 ---> e5a03c34f700 Step 11/11 : CMD [ "yarn", "dev" ] ---> Running in a74809ecc5d4 Removing intermediate container a74809ecc5d4 ---> 5ca7bf661d87 Successfully built 5ca7bf661d87
$ docker image ls | grep 5ca7bf661d87 <none> <none> 5ca7bf661d87 28 seconds ago 284MB
まとめ
- Multi Stage Buildを利用することでイメージの容量がだいぶ減るので利用しない手はない。
