安装keepalived

yum -y install kernel-devel

ln -s /usr/src/kernels/2.6.32-642.15.1.el6.x86_64/ /usr/src/linux

cd /usr/local/src/
wget http://www.keepalived.org/software/keepalived-1.2.20.tar.gz
tar -zxvf keepalived-1.2.20.tar.gz
cd keepalived-1.2.20

./configure
make && make install

生成keepalived 的启动命令
cp /usr/local/etc/rc.d/init.d/keepalived /etc/init.d/

配置启动脚本的参数:
cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/

配置文件默认路径:
mkdir /etc/keepalived

拷贝配置文件到默认路径:
cp /usr/local/etc/keepalived/keepalived.conf /etc/keepalived/

cp /usr/local/sbin/keepalived /usr/sbin/

/etc/init.d/keepalived start

ps -ef |grep keepalived

cd /etc/keepalived/
cp keepalived.conf keepalived.conf.default
vim keepalived.conf

： notification_email {
　　test@qq.com
}

router_id LVS_01

vrrp_instance VI_1 {
 state MASTER
 interface eth0
 virtual_router_id 51
 priority 150
 advert_int 1
 authentication {
 auth_type PASS
 auth_pass 1111
 }
 virtual_ipaddress {
 192.168.1.190/24 （2台机都一样，是ip addr 添加的虚拟IP）
 }
 }

/etc/init.d/keepalived start
ip addr add 192.168.1.190/24 dev eth0
ip addr

ip add|grep 192.168.1.190(只能在一台机有结果输出，不然就是裂脑了)

可以ping 同主，backup 有VIP(虚拟IP) 就认为是裂脑了

centos6 安装 keepalived