在线上部署keepalived的时候遇到了问题总结下：
2台服务器
eth0为内网卡
eth2为外网卡
在主备切换的时候没有收到vrrp广播包
刚开始部署的时候copy的网上的配置文件，所以中招了
错误日志信息：/var/log/message
Oct 9 07:57:35 test4 Keepalived_vrrp[22495]: Sync instance needed on eth2 !!!
Oct 9 07:57:35 test4 Keepalived_vrrp[22495]: VRRP_Instance(VI_10) Dropping received VRRP packet...
Oct 9 07:57:37 test4 Keepalived_vrrp[22495]: advertissement interval mismatch mine=1000000 rcved=2
Oct 9 07:57:37 test4 Keepalived_vrrp[22495]: Sync instance needed on eth2 !!!
Oct 9 07:57:37 test4 Keepalived_vrrp[22495]: VRRP_Instance(VI_10) Dropping received VRRP packet...
Oct 9 07:57:39 test4 Keepalived_vrrp[22495]: advertissement interval mismatch mine=1000000 rcved=2
Oct 9 07:57:39 test4 Keepalived_vrrp[22495]: Sync instance needed on eth2 !!!
Oct 9 07:57:39 test4 Keepalived_vrrp[22495]: VRRP_Instance(VI_10) Dropping received VRRP packet...
Oct 9 07:57:41 test4 Keepalived_vrrp[22495]: advertissement interval mismatch mine=1000000 rcved=2
Oct 9 07:57:41 test4 Keepalived_vrrp[22495]: Sync instance needed on eth2 !!!
Oct 9 07:57:41 test4 Keepalived_vrrp[22495]: VRRP_Instance(VI_10) Dropping received VRRP packet...
Oct 9 07:57:43 test4 Keepalived_vrrp[22495]: advertissement interval mismatch mine=1000000 rcved=2
Oct 9 07:57:43 test4 Keepalived_vrrp[22495]: Sync instance needed on eth2 !!!
Oct 9 07:57:43 test4 Keepalived_vrrp[22495]: VRRP_Instance(VI_10) Dropping received VRRP packet..
解决方法：
vrrp_instance VI_10 {
state BACKUP
interface eth0 注意：eth0是内网网卡，这个选项是定义接受vrrp广播包的网卡，而不是有的博客说的虚拟ip绑定的网卡，这里被网上配置文件给坑了。
virtual_router_id 111
mcast_src_ip 10.28.163.89
priority 100
nopreempt
authentication {
auth_type PASS
auth_pass HAmysql
}
track_script {
check_mysqld
}
virtual_ipaddress {
1.1.1.1/29 dev eth2 scope global 这里才是定义vip绑定的网卡为eth2
}
}
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