自定义日志：
keepalived的日志默认存储在/var/log/messages
有时我们会有需要将keepalived日志拿出来单独分析，那么这就需要我做自己去定义
/etc/sysconfig/keepalived
KEEPALIVED_OPTIONS="-D -d -S 0"
vim /etc/rsyslog.conf
local0.* /var/log/keepalived.log
*.info;mail.none;authpriv.none;cron.none;local0.none /var/log/messages
service rsyslog restart
双主互备：
在日常使用中如果keepalived工作在master/backup模式
只要master不出现故障backup就一直处于空闲状态极大的浪费了物理资源
在负载较大的情况下master的压力会比较大
keepalived双主互备的出现正好解决了master/backup下缺点
双主互备配置实例：
global_defs {
router_id LVS_DEVEL
vrrp_skip_check_adv_addr
vrrp_strict
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.0.200
}
}
virtual_server 192.168.0.200 80 {
delay_loop 3
lb_algo rr
lb_kind DR
protocol TCP
real_server 192.168.0.70 80 {
weight 1
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
}
vrrp_instance VI_2 {
state BACKUP
interface eth0
virtual_router_id 100
priority 99
advert_int 1
authentication {
auth_type PASS
auth_pass 1234
}
virtual_ipaddress {
192.168.0.201
}
}
virtual_server 192.168.0.201 80 {
delay_loop 3
lb_algo rr
lb_kind DR
protocol TCP
real_server 192.168.0.60 80 {
weight 1
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
real_server 192.168.0.70 80 {
weight 1
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
}
http://hongchen99.blog.51cto.com/12534281/1920334
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