在宿主机上准备的文件清单：
Dockerfile
#启动ssh和apache服务的角本
run.sh
以上文件都放到/root/apache_centos目录下
mkdir -p /root/apache_centos
cd /root/apache_centos
基础镜像：以镜像centos为基础的开放SSH服务的镜像
[root@localhost apache_centos]# docker images
REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE
sshd dockerfile 411d5fb16366 23 hours ago 278 MB
centos latest 0f73ae75014f 5 weeks ago 172.3 MB
在/root/apache_centos目录新建run.sh
vim run.sh
#!/bin/bash
/usr/sbin/sshd &
/usr/local/apache2/bin/httpd -D FOREGROUND
在/root/apache_centos目录新建Dockerfile
vim Dockerfile
文件内容如下：
#新生成的镜像是基于sshd:dockerfile镜像
FROM sshd:dockerfile
MAINTAINER by Steven
#安装wget
RUN yum install -y wget
WORKDIR /usr/local/src
#下载并解压源码包
RUN wget http://apache.fayea.com/httpd/httpd-2.4.17.tar.gz
RUN tar -zxvf httpd-2.4.17.tar.gz
WORKDIR httpd-2.4.17
#编译安装apache
RUN yum install -y gcc make apr-devel apr apr-util apr-util-devel pcre-devel
RUN ./configure --prefix=/usr/local/apache2 --enable-mods-shared=most --enable-so
RUN make
RUN make install
#修改apache配置文件
RUN sed -i 's/#ServerName www.example.com:80/ServerName localhost:80/g' /usr/local/apache2/conf/httpd.conf
#启动apache服务
RUN /usr/local/apache2/bin/httpd
#复制服务启动脚本并设置权限
ADD run.sh /usr/local/sbin/run.sh
RUN chmod 755 /usr/local/sbin/run.sh
#开放80端口
EXPOSE 80
CMD ["/usr/local/sbin/run.sh"]
需要注意的是：在Dockerfile文件中更换当前目录不可以用“cd”命令，而要改用“WORKDIR”.
docker build -t apache_dockerfile:centos .
查看生成的镜像：
[root@localhost apache_centos]# docker images
REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE
apache_dockerfile centos f8f30b4a0ee8 24 minutes ago 440 MB
apache centos f92c55dddd07 17 hours ago 423.9 MB
sshd dockerfile 411d5fb16366 23 hours ago 278 MB
centos latest 0f73ae75014f 5 weeks ago 172.3 MB
docker run -d -p 2222:22 -p 8000:80 apache_dockerfile:centos /usr/local/sbin/run.sh
将容器的22端口和80端口分别映射到到宿主机上的2222端口和8000端口,并运行服务脚本。
[root@localhost apache_centos]# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
ae560e497f39 apache_dockerfile:centos "/usr/local/sbin/run 45 seconds ago Up 44 seconds 0.0.0.0:2222->22/tcp, 0.0.0.0:8000->80/tcp condescending_bardeen
6490cd244c10 apache:centos "/usr/local/apache2/ 17 hours ago Exited (0) 17 hours ago loving_wright
673e946b57e4 sshd:dockerfile "/usr/local/sbin/run 18 hours ago Exited (137) reverent_bell
测试apache
[root@localhost apache_centos]# curl localhost:8000
<html><body><h1>It works!</h1></body></html>
成功！
测试ssh
[root@localhost apache_centos]# ssh localhost -p 2222
root@localhost's password:
成功！