dockerfile实战-制作基础镜像的Base镜像

实战案例：Dockerfile 制作基于基础镜像的Base镜像

准备目录结构，下载镜像并初始化系统

#按照业务类型或系统类型等方式划分创建目录环境，方便后期镜像比较多的时候进行分类
[root@ubuntu1804 ~]#mkdir /data/dockerfile/{web/{nginx,apache,tomcat,jdk},system/{centos,ubuntu,alpine,debian}} -p
[root@ubuntu1804 ~]#tree /data/dockerfile/
/data/dockerfile/
├── system
│   ├── alpine
│   ├── centos
│   ├── debian
│   └── ubuntu
└── web
    ├── apache
    ├── jdk
    ├── nginx
    └── tomcat

10 directories, 0 files
[root@ubuntu1804 ~]#

#下载基础镜像
[root@ubuntu1804 ~]#docker pull centos:centos7.7.1908
[root@ubuntu1804 ~]#docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
centos              centos7.7.1908      08d05d1d5859        2 months ago        204MB

先制作基于基础镜像的系统Base镜像

#先制作基于基础镜像的系统base镜像
[root@ubuntu1804 ~]#cd /data/dockerfile/system/centos/
#创建Dockerfile，注意可以是dockerfile，但无语法着色功能

[root@ubuntu1804 centos]#vim Dockerfile
[root@ubuntu1804 centos]#cat Dockerfile
FROM centos:centos7.7.1908

LABEL maintainer="wangxiaochun <root@wangxiaochun.com>"

RUN yum -y install wget && rm -f /etc/yum.repos.d/* && wget -P /etc/yum.repos.d/ http://mirrors.aliyun.com/repo/Centos-7.repo /
    && wget -P /etc/yum.repos.d/ http://mirrors.aliyun.com/repo/epel-7.repo /
    && yum -y install  vim-enhanced tcpdump lrzsz tree telnet bash-completion net-tools wget bzip2 lsof  zip unzip nfs-utils gcc make gcc-c++ glibc glibc-devel pcre pcre-devel openssl  openssl-devel systemd-devel zlib-devel /
    && yum clean all /
    && rm -f /etc/localtime  /
    && ln -s ../usr/share/zoneinfo/Asia/Shanghai /etc/localtime

[root@ubuntu1804 centos]#vim build.sh
[root@ubuntu1804 centos]#cat build.sh
#!/bin/bash
#
docker build -t centos7-base:v1  .
[root@ubuntu1804 centos]#chmod +x build.sh
[root@ubuntu1804 centos]#./build.sh 
[root@ubuntu1804 centos]#docker images 
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
centos7-base        v1                  1ba1317e06dc        23 seconds ago      402MB
centos              centos7.7.1908      08d05d1d5859        2 months ago        204MB
[root@ubuntu1804 centos]#docker image history centos7-base:v1  
IMAGE               CREATED             CREATED BY                                      SIZE                COMMENT
1ba1317e06dc        43 seconds ago      /bin/sh -c yum -y install wget && rm -f /etc…   198MB               
6b87f2843eb9        About an hour ago   /bin/sh -c #(nop)  LABEL maintainer=wangxiao…   0B                  
08d05d1d5859        2 months ago        /bin/sh -c #(nop)  CMD ["/bin/bash"]            0B                  
<missing>           2 months ago        /bin/sh -c #(nop)  LABEL org.label-schema.sc…   0B                  
<missing>           2 months ago        /bin/sh -c #(nop) ADD file:3e2a127b44ed01afc…   204MB

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