1：
virtual_router_id 在一个网段内（比如内网，外网）不能重复，否则会报：
Mar 9 07:32:52 keepalivet2 Keepalived_vrrp: VRRP_Instance(VI_1) Dropping received VRRP packet…
Mar 9 07:32:53 keepalivet2 Keepalived_vrrp: ip address associated with VRID not present in received packet : 1992032266
Mar 9 07:32:53 keepalivet2 Keepalived_vrrp: one or more VIP associated with VRID mismatch actual MASTER advert
Mar 9 07:32:53 keepalivet2 Keepalived_vrrp: bogus VRRP packet received on eth0 !!!
我当时的情形是：我有两个测试环境，这两个测试环境的keepalived中的
virtual_router_id 都是一样的，只要修改任何一对就可以了！
2：keepalived安装完成后，却不能启动，解决方法见附件！
3：
checking openssl/ssl.h usability... no
checking openssl/ssl.h presence... no
checking for openssl/ssl.h... no
configure: error:
!!! OpenSSL is not properly installed on your system. !!!
!!! Can not include OpenSSL headers files.
原因：缺少openssl
解决方法：yum -y install openssl-devel
4：keepalived编译参数问题：
我下载是新版本的的，和以前的编译参数有所不同，这里已经再也没有 --with-kernel=/usr/src/kernels/* 如果你configure的时候加上该参数，会提示认不得该参数！ 老版本的keepalived，需要加上 --with-kernel=/usr/src/kernels/* 才能支持lvs，
看到红色字体部分为yes 方可支持lvs
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