docker nginx1.7.6+keepalived实现双机热备
0.前提条件
环境两台ubuntu版本14.04 64位系统(并获取root权限)
![](https://images2015.cnblogs.com/blog/155823/201608/155823-20160819101911437-1348734827.png)
假设两台服务器ip为:172.16.34.214(master),172.16.34.215(backup),keepalived的虚拟ip为172.16.34.216
两台ubuntu系统上装好docker,版本如下
![](https://images2015.cnblogs.com/blog/155823/201608/155823-20160819101926984-1657628183.png)
1.运行docker的nginx1.7.6镜像实例
拉取基于官方的nginx1.7.6镜像
#docker pull nginx:1.7.6
新建nginx测试页面(同样在另外一台机子上就不重复了,记得改ip)
新建nginx测试页面(同样在另外一台机子上就不重复了,记得改ip)
#mkdir -p /tmp/docker
#echo "<h2 >This is nginx official container running on 172.16.34.214 </h2><br /> static files:/tmp/docker/index.html" > /tmp/docker/index.html
运行docker实例
#docker run --name nginx_m --restart=always -v /tmp/docker:/usr/share/nginx/html:ro -p 80:80 -d nginx:1.7.6
(注:--restart=always是指在docker服务重启后,该容器服务也会自动重启)
2.宿主机安装配置keepalived
#apt-get clean && apt-get update
#apt-get install -y libssl-dev openssl libpopt-dev
#apt-get install -y keepalived
#cp /usr/share/doc/keepalived/samples/keepalived.conf.sample /etc/keepalived/keepalived.conf
#vim /etc/keepalived/keepalived.conf
master主机如下配置 backup如下配置
![](https://images2015.cnblogs.com/blog/155823/201608/155823-20160819101943593-1292591712.png)
![](https://images2015.cnblogs.com/blog/155823/201608/155823-20160819101957609-1591657165.png)
启动keepalived服务
#service keepalived start[stop,restart]
![](https://images2015.cnblogs.com/blog/155823/201608/155823-20160819102014015-292633570.png)
在master机器上面查看虚拟是否绑定上了
![](https://images2015.cnblogs.com/blog/155823/201608/155823-20160819102032078-1625347119.png)
3.验证双活效果
访问172.16.34.214主机:
![](https://images2015.cnblogs.com/blog/155823/201608/155823-20160819102043109-556259383.png)
访问172.16.34.215主机:
![](https://images2015.cnblogs.com/blog/155823/201608/155823-20160819102057093-754774148.png)
访问172.16.34.216虚拟ip:
![](https://images2015.cnblogs.com/blog/155823/201608/155823-20160819102107171-1844135951.png)
可以看出此时master主机nginx运行正常
把master主机ngxin服务停止
#docker stop nginx_m
![](https://images2015.cnblogs.com/blog/155823/201608/155823-20160819102120203-1117001931.png)
在215机子查看ip绑定
#ip a
![](https://images2015.cnblogs.com/blog/155823/201608/155823-20160819102128906-1067777463.png)
可以看到虚拟ip迁移至备份机器了,说明我们配置成功!
访问网页
![](https://images2015.cnblogs.com/blog/155823/201608/155823-20160819102138406-2028037946.png)
![](https://images2015.cnblogs.com/blog/155823/201608/155823-20160819102149531-91169174.png)
![](https://images2015.cnblogs.com/blog/155823/201608/155823-20160819102158593-1356313413.png)
再把master主机nginx恢复回来
#docker start nginx_m
![](https://images2015.cnblogs.com/blog/155823/201608/155823-20160819102211062-1482979174.png)
在214机子查看ip绑定
#ip a
![](https://images2015.cnblogs.com/blog/155823/201608/155823-20160819102229937-104456985.png)
访问网页
![](https://images2015.cnblogs.com/blog/155823/201608/155823-20160819102242187-1252945697.png)
小结:安装都很简单,配置其实也不复杂,就是要细心点,本文就为了给大家参考,希望大家可以实际运用到自己的生产环境中去。
注:转载请注明出处!