dockerfile 分层构建业务镜像
作者：忙着长大#
- 2022-10-30 广东
本文字数：1917 字
阅读完需：约 6 分钟
本文介绍如何实现业务镜像的分层构建，以 nginx 为例。相看完整的 dockerfile 直接看第三步(3)。
1、构建系统镜像，主要是将 nginx 的相关依赖打包到系统镜像中。
dockerfile
FROM ubuntu:22.04MAINTAINER "yt 1395001789@qq.com"
#ADD sources.list /etc/apt/sources.list
#RUN apt-get install -y apt-transport-https ca-certificates curl software-properties-commonRUN apt update && apt install -y iproute2 ntpdate tcpdump telnet traceroute nfs-kernel-server nfs-common lrzsz tree openssl libssl-dev libpcre3 libpcre3-dev zlib1g-dev ntpdate tcpdump telnet traceroute gcc openssh-server lrzsz tree openssl libssl-dev libpcre3 libpcre3-dev zlib1g-dev ntpdate tcpdump telnet traceroute iotop unzip zip make复制代码
构建命令
docker build -t ubuntu-base:22.04 -f dockerfile .复制代码
2、构建 nginx 镜像
dockerfile
FROM ubuntu-base:22.04
ADD nginx-1.22.1.tar.gz /usr/local/src/RUN cd /usr/local/src/nginx-1.22.1 && ./configure --prefix=/apps/nginx && make && make install && ln -sv /apps/nginx/sbin/nginx /usr/bin复制代码
构建命令
docker build -t local/ubuntu-nginx:v1 -f dockerfile .复制代码
3、整合 nginx 镜像构建的 dockerfile，至此 nginx 的基础镜像已经构建完成，后续可以基于此镜像将前端代码打包到镜像内。
目录结构
root@yt:~/ubuntu-nginx# lsdocker-entrypoint.sh dockerfile nginx-1.22.1.tar.gz sources.list复制代码
dockerfile
FROM ubuntu:22.04MAINTAINER "yt 1395001789@qq.com"
## 下载加速#ADD sources.list /etc/apt/sources.list
RUN apt update && apt install -y iproute2 ntpdate tcpdump telnet traceroute nfs-kernel-server nfs-common lrzsz tree openssl libssl-dev libpcre3 libpcre3-dev zlib1g-dev ntpdate tcpdump telnet traceroute gcc openssh-server lrzsz tree openssl libssl-dev libpcre3 libpcre3-dev zlib1g-dev ntpdate tcpdump telnet traceroute iotop unzip zip make
ADD nginx-1.22.1.tar.gz /usr/local/src/RUN cd /usr/local/src/nginx-1.22.1 && ./configure --prefix=/apps/nginx && make && make install && ln -sv /apps/nginx/sbin/nginx /usr/binRUN groupadd -g 2088 nginx && useradd -g nginx -s /usr/sbin/nologin -u 2088 nginx && chown -R nginx.nginx /apps/nginxADD nginx.conf /apps/nginx/conf/
EXPOSE 80 443
## 通过 ENTRYPOINT 的方式启动nginx#ENTRYPOINT ["/apps/nginx/sbin/nginx","-g","daemon off;"]
## 通过 ENTRYPOINT + CMD 的方式启动nginx ， CMD 会作为 ENTRYPOINT 的执行参数。#ENTRYPOINT ["/apps/nginx/sbin/nginx"]#CMD ["-g","daemon off;"]
## 通过启动脚本方式启动nginxCOPY docker-entrypoint.sh /docker-entrypoint.shRUN chmod a+x /docker-entrypoint.shENTRYPOINT ["/docker-entrypoint.sh"]复制代码
sources.list
# 默认注释了源码镜像以提高 apt update 速度，如有需要可自行取消注释deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy main restricted universe multiverse# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy main restricted universe multiversedeb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-updates main restricted universe multiverse# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-updates main restricted universe multiversedeb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-backports main restricted universe multiverse# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-backports main restricted universe multiversedeb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-security main restricted universe multiverse# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-security main restricted universe multiverse复制代码
docker-entrypoint.sh
#!/bin/bash/apps/nginx/sbin/nginx -g "daemon off;"复制代码
构建命令
docker build -t local/ubuntu-nginx:v2 -f dockerfile .复制代码
4、将前端代码打包到镜像。
dockerfile
FROM local/ubuntu-nginx:v2
#RUN groupadd -g 2088 nginx && useradd -g nginx -s /usr/sbin/nologin -u 2088 nginx && chown -R nginx.nginx /apps/nginxADD nginx.conf /apps/nginx/conf/ADD frontend.tar.gz /apps/nginx/html/
ENTRYPOINT ["/apps/nginx/sbin/nginx","-g","daemon off;"]复制代码
构建命令
docker build -t local/ubuntu-nginx:v3 -f dockerfile .复制代码
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