安装依赖：
yum -y install popt-devel
yum -y install openssl openssl-devel
下载:
wget http://www.keepalived.org/software/keepalived-1.2.7.tar.gz
解压：
tar zxvf keepalived-1.2.7.tar.gz
cd keepalived-1.2.7
./configure
make
make install
拷贝文件：
cp /usr/local/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/
cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/
mkdir /etc/keepalived
cp /usr/local/etc/keepalived/keepalived.conf /etc/keepalived/
cp /usr/local/sbin/keepalived /usr/sbin/
加入启动服务：
echo "/usr/local/nginx/sbin/nginx" >> /etc/rc.local
echo "/etc/init.d/keepalived start" >> /etc/rc.local
查看rc.local文件：
有，则启动nginx：
/usr/local/nginx/sbin/nginx
启动keepalived:
/etc/init.d/keepalived start
修改配置文件：
vi /etc/keepalived/keepalived.conf
找到：rooter_id **** 修改为：
rooter_id NGINX_UPSTREAM
修改网卡：
interface etho(CentOS6)--》interface ens33
修改虚拟ip：
virtual_ipaddress{
192.168.140.100
}
删除从服务器
退出后在主从服务器上启动keepalived:
/etc/init.d/keepalived start or（service keepalived start）
在主服务器上查看是否已经绑定了虚拟ip：
ip addr
*****补充内容*******
vim中删除多行：
删除光标之前：dgg
删除光标之后：dG
删除行第一个：dg0
