使用Dockerfile创建带Apache服务的Centos Docker镜像
在宿主机上准备的文件清单：
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Dockerfile
#启动ssh和apache服务的角本
run.sh
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以上文件都放到/root/apache_centos目录下
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mkdir
-p
/root/apache_centos
cd
/root/apache_centos
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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
一、准备run.sh文件
在/root/apache_centos目录新建run.sh
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vim run.sh
#!/bin/bash
/usr/sbin/sshd
&
/usr/local/apache2/bin/httpd
-D FOREGROUND
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二、准备Dockerfile
在/root/apache_centos目录新建Dockerfile
vim Dockerfile
文件内容如下：
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#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"
]
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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”.
三、生成镜像
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docker build -t apache_dockerfile:centos .
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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
四、根据镜像生成的容器并进行测试
1、生成新的容器
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docker run -d -p 2222:22 -p 8000:80 apache_dockerfile:centos
/usr/local/sbin/run
.sh
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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。
2、查看新生成的容器：
[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
3、测试
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！
