Docker Base Image自己创建具体实现

修改网络配置 /etc/sysconfig/network-script/ifcfg-enp0s3。删除 UUID，HWADDR ；修改ONBOOT=no 为 ONBOOT=yes , 然后保存 。$ ifconfig Cannot find a valid baseurl for repo: base/7/x86_6重启网络接口：[root@centos7 ~]#ifdown enps03[root@centos7 ~]#ifup enps03$ yum install ifconfig  提示：Nothing to do 通过” yum provides” 命令列出那个包提供ifconfig命令$ yum provides ifconfig  // 安装$ yum -y install net-tools

安装 EPEL (参考：http://www.tecmint.com/how-to-enable-epel-repository-for-rhel-centos-6-5/ )[root@centos7 ~]# rpm -Uvh http://dl.fedoraproject.org/pub/epel/7/x86_64/e/epel-release-7-5.noarch.rpm修改/etc/yum.repos.d/CentOS-Base.repo 把enabled=0 改成enabled=1vim /etc/yum.repos.d/CentOS-Base.repo[centosplus]enabled=1安装 Docker[root@centos7 yum.repos.d]# yum install docker-io启动 Docker [root@centos7 yum.repos.d]# service docker start

替换变量把 /etc/yum.repos.d/CentOS-Base.repo 文件中$releasever 替换成 7$basearch 替换成 x86_64快速替换方法：vim /etc/yum.repos.d/CentOS-Base.repo:%s/$releasever/7/g:%s/$basearch/x86_64/g创建Docker image 生成脚本[root@centos7 yum.repos.d]# cd /root[root@centos7 ~]# mkdir scripts[root@centos7 ~]# cd scripts/[root@centos7 scripts]# vim createimage.sh然后把 https://github.com/docker/docker/blob/master/contrib/mkimage-yum.sh 文件中内容粘贴进去[root@centos7 scripts]# chmod +x createimage.sh创建image[root@centos7 scripts]# ./createimage.sh centos7base创建成功后查看，并把当前运行的容器删除掉[root@centos7 tmp]# docker imagesREPOSITORY     TAG         IMAGE ID      CREATED       VIRTUAL SIZEcentos7base     7.1.1503      112ee00c2cbc    8 minutes ago    227.7 MB[root@centos7 tmp]# docker ps -allCONTAINER ID    IMAGE         COMMAND       CREATED       STATUS           PORTS        NAMES752b9d49a079    centos7base:7.1.1503  "echo success"   10 minutes ago   Exited (0) 10 minutes ago            mad_saha[root@centos7 tmp]# docker rm 752b9d49a079752b9d49a079[root@centos7 tmp]# docker ps -allCONTAINER ID    IMAGE        COMMAND       CREATED       STATUS       PORTS        NAMES导出image[root@centos7 tmp]# cd /tmp/[root@centos7 tmp]# docker imagesREPOSITORY     TAG         IMAGE ID      CREATED       VIRTUAL SIZEcentos7base     7.1.1503      112ee00c2cbc    14 minutes ago   227.7 MB[root@centos7 tmp]# docker save 112ee00c2cbc > /tmp/centos7base.tar[root@centos7 tmp]# lscentos7base.tar ks-script-L8TDO5 yum.log[root@centos7 tmp]# 

docker stop <CONTAINER ID> ：用来停止运行中的容器，同时你还可以用docker start <CONTAINER ID>：用来启动一个已经停止的容器。docker restart <CONTAINER ID>：可以重启一个运行中的容器。这就相当于对一个容器先进行stop再start。docker attach <CONTAINER ID> ：关联到一个正在运行的容器删除镜像: docker rmi <IMAGE ID>  docker rmi 2db1e85f26ba删除容器：docker rm <CONTAINER ID>  docker rm c3bfb652a491查看正在运行的容器  docker ps -all停止容器：  exit重新进入窗口  docker start <CONTAINER ID>  docker attach <CONTAINER ID>暂时退出容器  ctrl + p 然后 ctrl + q重新入进：  docker attach <CONTAINER ID>将容器保存成镜像：  docker commit <CONTAINER ID> <NAME>:<TAG>

回去宿主机，把虚拟机中导出的image拷到本地hr:~ hr$ mkdir -p docker/imageshr:~ hr$ cd docker/images/hr:images hr$ scp root@192.168.1.4:/tmp/centos7base.tar .hr:images hr$ ls -lahtotal 469392drwxr-xr-x 3 hr staff  102B 12 5 21:08 .drwxr-xr-x 3 hr staff  102B 12 5 21:05 ..-rw-r--r-- 1 hr staff  229M 12 5 21:08 centos7base.tar启动Docker Quick Start Terminal加载IMAGE 包到docker imagehr:images hr$ docker load < /Users/hr/docker/images/centos7base.tarhr:images hr$ docker imagesREPOSITORY     TAG         IMAGE ID      CREATED       VIRTUAL SIZE<none>       <none>       112ee00c2cbc    29 minutes ago   227.7 MBhello-world     latest       975b84d108f1    7 weeks ago     960 BTAR 等于none的就是刚刚导入的，把TAG改个名字：hr:images hr$ docker tag 112ee00c2cbc centos7base:7.1hr:images hr$ docker imagesREPOSITORY     TAG         IMAGE ID      CREATED       VIRTUAL SIZEcentos7base     7.1         112ee00c2cbc    33 minutes ago   227.7 MBhello-world     latest       975b84d108f1    7 weeks ago     960 B运行容器：hr:images hr$ docker run -i -t 112ee00c2cbc /bin/bash[root@e948acae7b42 /]# hostnamee948acae7b42[root@e948acae7b42 /]# cat /etc/redhat-release CentOS Linux release 7.1.1503 (Core)