将keepalived安装成Linux系统服务，因为没有使用keepalived的默认安装路径（默认路径：/usr/local）,安装完成之后，需要做一些修改工作： 首先创建文件夹，将keepalived配置文件进行复制： mkdir /etc/keepalived cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/ 然后复制keepalived脚本文件： cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/ cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/ ln -s /usr/local/sbin/keepalived /usr/sbin/ ln -s /usr/local/keepalived/sbin/keepalived /sbin/ 可以设置开机启动：chkconfig keepalived on，到此我们安装完毕!
service keepalived start service keepalived stop
vi /etc/keepalived/keepalived.conf
vrrp_script chk_nginx { script "/etc/keepalived/nginx_check.sh" #运行脚本，脚本内容下面有，就是起到一个nginx宕机以后，自动开启服务 interval 2 #检测时间间隔 weight -20 #如果条件成立的话，则权重 -20 } # 定义虚拟路由，VI_1 为虚拟路由的标示符，自己定义名称 vrrp_instance VI_1 { state MASTER #来决定主从 interface ens33 # 绑定虚拟 IP 的网络接口，根据自己的机器填写 virtual_router_id 121 # 虚拟路由的 ID 号， 两个节点设置必须一样 mcast_src_ip 192.168.212.140 #填写本机ip priority 100 # 节点优先级,主要比从节点优先级高 nopreempt # 优先级高的设置 nopreempt 解决异常恢复后再次抢占的问题 advert_int 1 # 组播信息发送间隔，两个节点设置必须一样，默认 1s authentication { auth_type PASS auth_pass 1111 } # 将 track_script 块加入 instance 配置块 track_script { chk_nginx #执行 Nginx 监控的服务 } virtual_ipaddress { 192.168.110.110 # 虚拟ip,也就是解决写死程序的ip怎么能切换的ip,也可扩展，用途广泛。可配置多个。 } }