6、Docker 镜像综合优化示例

Docker 镜像综合优化示例

该篇内容，主要对前面的单项优化做综合的汇总，并根据基础镜像的不同，给出不同的优化示例。

基于 Alpine 镜像

基础镜像：

FROM alpine:latest

# 镜像源加速
RUN echo "https://mirrors.aliyun.com/alpine/latest-stable/main/" > /etc/apk/repositories
RUN echo "https://mirrors.aliyun.com/alpine/latest-stable/community/" >> /etc/apk/repositories

# 自定义环境变量
ENV TZ=Asia/Shanghai

#RUN ln -sf /usr/share/zoneinfo/${TZ} /etc/localtime && echo ${TZ} > /etc/timezone
RUN apk update \
    && apk add tzdata \
    && ln -sf /usr/share/zoneinfo/${TZ} /etc/localtime \
    && echo "${TZ}" > /etc/timezone \
    && rm /var/cache/apk/*

Nginx 镜像：

FROM nginx:stable-alpine

# 镜像源加速
RUN echo "https://mirrors.aliyun.com/alpine/latest-stable/main/" > /etc/apk/repositories
RUN echo "https://mirrors.aliyun.com/alpine/latest-stable/community/" >> /etc/apk/repositories

# 自定义环境变量
ENV TZ=Asia/Shanghai

# 设置本地系统时间和时区
RUN ln -sf /usr/share/zoneinfo/${TZ} /etc/localtime && echo ${TZ} > /etc/timezone

OpenJDK 镜像：

#FROM openjdk:11-jre-alpine
#FROM openjdk:11-jdk-alpine
#FROM openjdk:8-jre-alpine
#FROM openjdk:8-jdk-alpine

FROM openjdk:8-jre-alpine

# 镜像源加速
RUN echo "https://mirrors.aliyun.com/alpine/v3.9/main/" > /etc/apk/repositories
RUN echo "https://mirrors.aliyun.com/alpine/v3.9/community/" >> /etc/apk/repositories

# 自定义环境变量
ENV TZ=Asia/Shanghai

# 设置本地系统时间和时区
#RUN ln -sf /usr/share/zoneinfo/${TZ} /etc/localtime && echo ${TZ} > /etc/timezone

# 把 Arthas 安装到基础镜像里 https://arthas.aliyun.com/doc/docker.html
COPY --from=hengyunabc/arthas:latest /opt/arthas /opt/arthas

# 添加字体依赖 && 安装 Arthas 会用到的依赖 && 设置本地系统时间和时区
RUN apk update \
    && apk add --no-cache bash curl ttf-dejavu ttf-freefont fontconfig ospd-netstat busybox-extras tini jq tzdata\
    && fc-cache --force \
    && ln -sf /usr/share/zoneinfo/${TZ} /etc/localtime \
    && echo "${TZ}" > /etc/timezone \
    && rm /var/cache/apk/*

Spring Boot 项目 Dockerfile 示例：

#FROM reg.hiwepy.com/base-image/openjdk-pinpont:1
#FROM reg.hiwepy.com/base-image/openjdk-8-shanghai:alpine
#FROM openjdk:11-jre-alpine
#FROM openjdk:11-jre-slim
#FROM openjdk:11-jdk-alpine
#FROM openjdk:11-jdk-slim
#FROM openjdk:11-jdk-oracle
#FROM openjdk:8-jre-alpine
#FROM openjdk:8-jre-slim
#FROM openjdk:8-jdk-alpine
#FROM openjdk:8-jdk-slim
#FROM openjdk:8-jdk-oracle

FROM openjdk:8-jdk-alpine

# 镜像源加速
RUN echo "https://mirrors.aliyun.com/alpine/v3.9/main/" > /etc/apk/repositories
RUN echo "https://mirrors.aliyun.com/alpine/v3.9/community/" >> /etc/apk/repositories

# 自定义环境变量
ENV TZ=Asia/Shanghai

# 设置本地系统时间和时区
#RUN ln -sf /usr/share/zoneinfo/${TZ} /etc/localtime && echo ${TZ} > /etc/timezone

# 把 Arthas 安装到基础镜像里 https://arthas.aliyun.com/doc/docker.html
COPY --from=hengyunabc/arthas:latest /opt/arthas /opt/arthas

# 添加字体依赖 && 添加字体依赖 && 安装 Arthas 会用到的依赖
RUN apk update \
    && apk add --no-cache bash curl ttf-dejavu ttf-freefont fontconfig ospd-netstat busybox-extras tini jq tzdata \
    && fc-cache --force \
    && ln -sf /usr/share/zoneinfo/${TZ} /etc/localtime \
    && echo "${TZ}" > /etc/timezone \
    && rm /var/cache/apk/*

# 申明临时卷
VOLUME /logs
VOLUME /tmp

# 拷贝本地Jar包到根目录
ADD ./target/app-1.0.0-SNAPSHOT.jar /

# 挂着启动脚本
ENTRYPOINT ["/sbin/tini", "--"]
CMD ["sh", "-c", "java -jar app-1.0.0-SNAPSHOT.jar"]

#ENTRYPOINT ["java", "-jar", "app-1.0.0-SNAPSHOT.jar"]

Uni-App 项目 Dockerfile 示例：

FROM nginx:stable-alpine

# 镜像源加速
RUN echo "https://mirrors.aliyun.com/alpine/latest-stable/main/" > /etc/apk/repositories
RUN echo "https://mirrors.aliyun.com/alpine/latest-stable/community/" >> /etc/apk/repositories

# 自定义环境变量
ENV TZ=Asia/Shanghai

# 设置本地系统时间和时区
RUN ln -sf /usr/share/zoneinfo/${TZ} /etc/localtime && echo ${TZ} > /etc/timezone

# 拷贝打包资源
ADD nginx.conf /etc/nginx/nginx.conf
ADD unpackage/dist/build/h5/ /usr/share/nginx/html

# 挂在启动点
ENTRYPOINT ["nginx-debug", "-g", "daemon off;"]

Vue 项目 Dockerfile 示例：

FROM nginx:stable-alpine

# 镜像源加速
RUN echo "https://mirrors.aliyun.com/alpine/latest-stable/main/" > /etc/apk/repositories
RUN echo "https://mirrors.aliyun.com/alpine/latest-stable/community/" >> /etc/apk/repositories

# 自定义环境变量
ENV TZ=Asia/Shanghai

# 设置本地系统时间和时区
RUN ln -sf /usr/share/zoneinfo/${TZ} /etc/localtime && echo ${TZ} > /etc/timezone

# 拷贝打包资源
ADD nginx.conf /etc/nginx/nginx.conf
ADD dist/ /usr/share/nginx/html

# 挂在启动点
ENTRYPOINT ["nginx-debug", "-g", "daemon off;"]

基于 Debian 镜像

基础镜像：

FROM debian:stretch

# 自定义环境变量
ENV TZ=Asia/Shanghai

基于 Ubuntu 镜像

写成 Dockerfile 如下：

FROM ubuntu:bionic

ENV TZ=Asia/Shanghai

RUN echo "${TZ}" > /etc/timezone \
    && ln -sf /usr/share/zoneinfo/${TZ} /etc/localtime \
    && apt update \
    && apt install -y tzdata \
    && rm -rf /var/lib/apt/lists/*