Nodejs Express dockerfile最佳实践

1. 少啰嗦,先看代码

1.1. package.json

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{
"name": "xxx",
"version": "0.0.0",
"private": true,
"scripts": {
"start": "node ./bin/www",
"forever": "node_modules/forever/bin/forever bin/www"
},
"dependencies": {
"async": "0.9.0",
"body-parser": "1.13.2",
"compression": "1.6.2",
"config": "1.12.0",
"connect-multiparty": "2.0.0",
"cookie-parser": "1.3.5",
"debug": "2.2.0",
"ejs": "2.3.3",
"express": "4.13.1",
"forever": "0.15.3",
"http-proxy-middleware": "0.17.3",
"log4js": "0.6.24",
"serve-favicon": "2.3.0"
}
}

1.2. dockerfile

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FROM node:9.2.1-alpine

RUN apk update && apk add bash tzdata \
&& cp -r -f /usr/share/zoneinfo/Asia/Shanghai /etc/localtime

WORKDIR /app

COPY package.json yarn.lock /app/

RUN yarn install --production && yarn cache clean

COPY . /app

EXPOSE 8088

CMD yarn run server

2. 分析原理

  • 使用alpine的nodejs镜像,显著缩小nodejs镜像大小
  • node:9.2.1-alpine自带yarn 和 npm
  • copy package到run npm i到copy . /app, 这样的顺序可以充分使用镜像缓存

修改过后,对比之前通过jenkins打包时间从10分钟缩短到7.4秒

3. 参考资料