Keepalived安装配置

先从官方网下载Keepalived，然后登陆Centos系统安装必要的环境：gcc、openssl、pcre。

将下载好的软件包拷贝到Centos根目录下。

解压软件包、编译安装：

tar zxvf keepalived-1.2.18.tar.gz

cd keepalived-1.2.18

./configure

make

make install

安装完成后配置文件：/usr/local/eth/keepalived/keepalived.conf

主节点：

备节点：

修改配置，允许绑定未知IP：

/etc/sysctl.conf net.ipv4.ip_nonlocal_bind = 1

sysctl -p

最后复制配置文件到相应的目录：

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

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

cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/  

cp -r /usr/local/etc/keepalived/            /etc/

重启服务：

service keepalived restart

查看绑定状态：

测试，用机器长ping虚拟地址，进行倒换测试：关闭主的keepalived时备用机会接管，这时可能会丢一个包。