centos6.5　安装keepalive　nginx配置

yum -y install libnl libnl-devel
yum install -y libnfnetlink-devel

cd 到目录下
./configure --prefix=/usr/local/keepalived
编译安装
make
make install

首先拷贝几个文件到CentOS６.５环境中：

cp keepalived-1.3.6/keepalived/etc/init.d/keepalived /etc/init.d/
mkdir /etc/keepalived
cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/
cp keepalived-1.3.6/keepalived/etc/sysconfig/keepalived /etc/sysconfig/
cp /usr/local/keepalived/sbin/keepalived /usr/sbin/

编写检测nginx存活脚本

vi /root/check_nginx.sh
if [ "$(ps -ef | grep "nginx:master process"| grep -v grep )" == "" ]  
 then  
    /etc/init.d/keepalived stop  
 else  
    echo "nginx is running"  
fi 

赋予执行权限

chmod +x /root/check_nginx.sh

加入到作业计划

crontab -e
*/1 * * * * /root/check_nginx.sh >>/root/check_nginx.log

配置keepalived配置文件

vi /etc/keepalived/keepalived.conf

!ConfigurationFile for keepalived  
global_defs {  
notification_email {                        ######定义接受邮件的邮箱  
 wangjj@hrloo.com  
       }  
 notification_email_from jiankong@staff.tuge.com    ######定义发送邮件的邮箱  
 smtp_server mail.tuge.com  
 smtp_connect_timeout 10  
}  
vrrp_script check_nginx {                   ######定义监控nginx的脚本  
    script "/root/check_nginx.sh"  
    interval 2                            ######监控时间间隔  
    weight 2                              ######负载参数  
    }  
vrrp_instance vrrptest {                 ######定义vrrptest实例  
       state BACKUP              ######服务器状态  
 interface eth0                     ######使用的接口  
       virtual_router_id 51               ######虚拟路由的标志，一组lvs的虚拟路由标识必须相同，这样才能切换  
       priority 150                       ######服务启动优先级，值越大，优先级越高，BACKUP 不能大于MASTER  
       advert_int 1                        ######服务器之间的存活检查时间  
authentication {  
       auth_type PASS                     ######认证类型  
       auth_pass ufsoft       ######认证密码，一组lvs 服务器的认证密码必须一致  
}  
track_script {                              ######执行监控nginx进程的脚本  
    check_nginx  
    }  
virtual_ipaddress {                         ######虚拟IP地址  
        192.168.1.106
}  
}  

先关闭防火墙（我这里图简单了，安全起见，你可以配置防火墙规则，这里略）

service iptables stop

开启keepalived服务

service keepalived start

测试是否成功

ip addr

寻找
inet 192.168.1.106/32 scope global eth0
成功