环境准备

1台centos 6.5镜像虚拟机  febootstrap、docker

 

febootstrap 安装

yum install -y yum-priorities && rpm -ivh http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm && rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6 yum -y install febootstrap

 

docker 安装

yum -y install docker-io service docker start

使用root账号制作镜像，普通用户制作后会有各种问题：

febootstrap -i bash -i wget -i yum -i iputils -i iproute -i man -i vim -i openssh-server -i openssh-clients -i tar -i gzip centos6 centos6-image http://mirrors.aliyun.com/centos/6/os/x86_64/  (-i 安装package， centos6 操作系统版本，centos6-doc安装目录，最后是源地址)

执行完成后 你当前目录会生成centos6-image 目录

cd centos6-imagecp etc/skel/.bash* root/ (不拷贝，登录后Linux提示行会显示 bash-41#，而不是我们正常看到的[root@localhost ~]#)tar -c .|docker import - centos6-base (centos6-base 为docker 镜像名称)

查看镜像

docker images REPOSITORY            TAG                 IMAGE ID            CREATED             VIRTUAL SIZEcentos6-base          latest              8f94e0bebd19        6 hours ago         399.4 MB

启动进入镜像

[root@192-168-0-151 build]# docker run  -itd 8f94e0bebd19 bash2e943abb130a32830dd8580ab9345dd514b7b39597559cd08a790a8754ef56f1[root@192-168-0-151 build]# docker exec -it 84f48b314bfa bash [root@2e943abb130a /]#

进入镜像后，你可以安装自己的应用，我这里安装的是php 和nginx

我在/etc/init.d/ 下加入了nginx 和php-fpm 的启停脚本（可以省略）

容器里应用开机启动

容器下面多个应用启动的方法有很多种，比如supervisord、shell脚本等

我这里用的是shell 脚本的方法

mkdir /usr/local/scripts[root@2e943abb130a scripts]# cat init-bashrc.sh#!/bin/shfunction service_start(){
       for SERVICE in nginx php-fpm sshd    do      if ! (ps ax | grep -v grep | grep $SERVICE > /dev/null)      then         /etc/init.d/$SERVICE start;      fi    done}service_start

 

编辑   ~/.bashrc 

[root@2e943abb130a scripts]# cat  ~/.bashrc    # .bashrc# Source global definitionsif [ -f /etc/bashrc ]; then        . /etc/bashrcfialias rm='rm -i'alias cp='cp -i'alias mv='mv -i'alias ll='ls -l'alias vi='vim'/usr/local/scripts/init-bashrc.sh# User specific aliases and functions

记得source  ~/.bashrc 

 

退出容器 ctrl +d

提交容器为新的镜像

docker commit 2e943abb130a centos6-nginx-php56:v1 d85f477d9e00d12c380ebc442d544e0d8c9dd8ee86441e0885bb54f636c18ec1

提交成功后，docker images 会发现多出一个镜像

启动新镜像

[root@192-168-0-151 build]# docker run -it centos6-nginx-php56:v1Starting nginx:                                            [  OK  ]Starting php-fpm:                                          [  OK  ]Starting sshd:                                             [  OK  ][root@36abc5805a89 /]#

你还可以启动时暴漏端口，修改root 密码等

这里我们可以用Dockerfile 来做，下面只是个示例，关于Dockerfile 这里就不说明了。

 cat Dockerfile

FROM centos6-nginx-php56:v1 MAINTAINER TemptedRUN sed -i 's/UsePAM yes/UsePAM no/g' /etc/ssh/sshd_configRUN echo "root:123456" | chpasswdEXPOSE 22 80CMD ["bash"]

 

build 新的镜像

[root@192-168-0-151 build]# docker  build -t centos6-lnp:v1 .Sending build context to Docker daemon 15.87 kBSending build context to Docker daemon Step 0 : FROM centos6-nginx-php56:v1 ---> d85f477d9e00Step 1 : MAINTAINER Tempted ---> Running in 46ec3f0fab12 ---> 4ed3d31476d0Removing intermediate container 46ec3f0fab12Step 2 : RUN sed -i 's/UsePAM yes/UsePAM no/g' /etc/ssh/sshd_config ---> Running in 48ece83ad435 ---> c02f08cf9b19Removing intermediate container 48ece83ad435Step 3 : RUN echo "root:123456" | chpasswd ---> Running in 22d1086800ca ---> 18db13e52113Removing intermediate container 22d1086800caStep 4 : EXPOSE 22 80 ---> Running in 8a65e01a0e84 ---> 63a5bd61ba88Removing intermediate container 8a65e01a0e84Step 5 : CMD bash ---> Running in 671572d70abf ---> d0c9c51584eeRemoving intermediate container 671572d70abfSuccessfully built d0c9c51584ee

 

这时你执行docker images 会看到三个image

启动新的镜像

[root@192-168-0-151 build]# docker run -itd d0c9c51584ee bashbc10a9e77a8c8b9eb12a7da16d6513ffa11a686d29dc86e050e702fac96a6109[root@192-168-0-151 build]# docker psCONTAINER ID        IMAGE               COMMAND                CREATED             STATUS              PORTS               NAMESbc10a9e77a8c        d0c9c51584ee        "bash"                 20 seconds ago      Up 17 seconds       22/tcp, 80/tcp      cocky_morse

 

[root@192-168-0-151 build]# docker  exec -it bc10a9e77a8c ifconfigeth0      Link encap:Ethernet  HWaddr 02:42:AC:11:00:51            inet addr:172.17.0.81  Bcast:0.0.0.0  Mask:255.255.0.0          inet6 addr: fe80::42:acff:fe11:51/64 Scope:Link          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1          RX packets:41 errors:0 dropped:0 overruns:0 frame:0          TX packets:38 errors:0 dropped:0 overruns:0 carrier:0          collisions:0 txqueuelen:0           RX bytes:5060 (4.9 KiB)  TX bytes:5179 (5.0 KiB)lo        Link encap:Local Loopback            inet addr:127.0.0.1  Mask:255.0.0.0          inet6 addr: ::1/128 Scope:Host          UP LOOPBACK RUNNING  MTU:65536  Metric:1          RX packets:0 errors:0 dropped:0 overruns:0 frame:0          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0          collisions:0 txqueuelen:0           RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

 

连接

[root@192-168-0-151 build]# ssh 172.17.0.81root@172.17.0.81's password: Last login: Fri Nov  3 17:23:16 2017 from 172.17.42.1[root@bc10a9e77a8c ~]#

导出镜像

docker  save centos6-lnp:v1 >centos6-lnp.tar