基础镜像

选择合适的基础镜像可以减小镜像大小，并确保基础镜像的安全性和更新性。Alpine、Ubuntu Minimal 等轻量级基础镜像是常用选择。

多阶段

#阶段1命名为builder
FROM golang:1.16 as builder
WORKDIR /go/src
COPY app.go ./
RUN go build app.go -o myapp
#阶段2
FROM builder as builder_ex
ADD dest.tar ./
...
docker 多阶段构建

缓存

比如 node package.json 不变既可以直接使用缓存

FROM node:18.18.2-buster-slim

WORKDIR /data/srv/

ENV TZ Asia/Shanghai
RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone

COPY package*.json ./
COPY patches ./

RUN npm config set registry <https://registry.npmmirror.com>
RUN npm_config_sharp_binary_host="<https://npmmirror.com/mirrors/sharp>" npm_config_sharp_libvips_binary_host="<https://npmmirror.com/mirrors/sharp-libvips>" npm install sharp

RUN npm install \\
    && npm install pm2 -g

COPY . ./

RUN npm run build

# RUN apt-get update \\
#     && apt-get -y install procps \\
#     && apt-get install -y vim

COPY ecosystem.config.js .

EXPOSE 3000

CMD ["pm2-runtime", "ecosystem.config.js"]