keepalived安装完成后，配置keepalived环境变量并设置系统服务。
将keepalived写入环境变量
echo 'export PATH=/usr/local/keepalived/sbin:$PATH' >> /etc/profile
tial -l /etc/profile
source /etc/profile
echo $PATH
配置keepalived为系统服务
copy keepalived source目录keepalived-1.3.2/keepalived/etc/init.d下的启动脚本文件到/etc/init.d/，重命名为keepalived。
keepalived-1.3.2/keepalived/etc/init.d 该目录下一般有三个启动脚本：
keepalived -- 通用启动脚本
keepalived.rh.init -- redhat 系统启动脚本
keepalived.suse.init -- suse系统启动脚本
因为我的系统是Centos，所以使用keepalived.rh.init脚本。
给启动脚本赋予执行权限，并设置开机自动启动。
chmod 755 /etc/init.d/keepalived
chkconfig —add keepalived
chkconfig keepalived on
chkconfig —list keepalived
以上配置都完成后，使用service命令启动keepalived。
service keepalived start
如果报一下错误：
Starting Keepalived for LVS: /bin/bash: keepalived: command not found [FAILED]
修改/etc/init.d/keepalived，
将 daemon keepalived -D 改为 指向keepalived的sbin具体位置的写法：
daemon /usr/local/keepalived/sbin/keepalived -D
保存退出。
重新执行启动命令，成功启动keepalived。