keepalived参考文章

keepalived 实现热备
http://i-david.iteye.com/blog/1684342
仅有操作的脚本，无详细解释。可以参考脚本。

keepalived实现双机热备
http://sjsky.iteye.com/blog/1156403
以一个web服务器为例，讲述了主机（3层，ICMP层）、脚本（5层，应用层）的检测方法。
并描述了注意事项。

Keepalived: 运行在 LVS 之上的故障转移负载均衡器
http://sjsky.iteye.com/blog/1156403
给出了一些keepalived的参考文件。


源码安装keepalived

cd /tmp
tar xzvf keepalived-1.2.7.tar.gz
cd keepalived-1.2.7
./configure
make
make install

安装位置	目标位置	说明
/usr/local/sbin/keepalived	/sbin/keepalived	主程序
/usr/local/etc/sysconfig/keepalived	/etc/sysconfig/keepalived	选项配置文件
/usr/local/etc/rc.d/init.d/keepalived	/etc/rc.d/init.d/keepalived	服务调用脚本文件

将文件从“安装位置”复制到“目标位置”：

cp /usr/local/sbin/keepalived /sbin/keepalived
cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/keepalived
cp /usr/local/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/keepalived

创建目录：

mkdir /etc/keepalived/

将配置文件复制到/etc/keepalived目前下，如下所示：

[root@VM-CHENGANG296 keepalived]# pwd
/etc/keepalived
[root@VM-CHENGANG296 keepalived]# ls -l
total 12
-rwxr-xr-x 1 root root 104 Apr  1 22:42 arp.sh
-rw-r--r-- 1 root root 629 Apr  1 22:40 keepalived.conf
-rwxr-xr-x 1 root root 578 Apr  1 23:06 mysql.sh

注意：arp.sh和mysql.sh加执行权限。

chmod +x arp.sh
chmod +x mysql.sh

启动keepalived：

service keepalived start

查看运行状态：

ip a l
tail /var/log/messages