centos6.6 LVS+keepalived

之前有写过keepalived+mysql 和lvsDR模式的分析篇。然而LVS没有写高冗余。今天来写一篇LVS+keepalived的

LVSDR只负责转发，LVS也没有nginx后端检查功能，所以后端realserver 宕机了，LVS还是会转发到后端去的。so 我们需要一个检查后端的功能，并剔除or增加。那这个任务就交给keepalived了

LVS安装 和keepalived 安装这里就不多说，

keepalived 安装请看：http://www.cnblogs.com/shiyiwen/p/5045027.html

LVSDR安装请看：http://www.cnblogs.com/shiyiwen/p/5069901.html

上拓扑



这里 37 为 master 161位backup

37-master keepalived.conf配置如下

! Configuration File for keepalived

global_defs {
notification_email {
907765003@qq.com
}
notification_email_from 907765003@qq.com
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}

# VIP1
vrrp_instance VI_1 {
state MASTER
interface eth0
lvs_sync_daemon_inteface eth0
virtual_router_id 51
priority 100
advert_int 5
#  nopreempt
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.0.36
}
}
virtual_server 192.168.0.36 80 {
delay_loop 6
lb_algo wrr
lb_kind DR
#    persistence_timeout 60
protocol TCP

real_server 192.168.0.38 80 {
weight 100
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
real_server 192.168.0.162 80 {
weight 100
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 80

}
}
}

161 BACKUP -keepalived.conf 如下

! Configuration Filefor keepalived
global_defs {
notification_email {
907765003@qq.com
}
notification_email_from 907765003@qq.com
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}
# VIP1
vrrp_instance VI_1 {
state BACKUP
interface eth0
lvs_sync_daemon_inteface eth0
virtual_router_id 51
priority 90
advert_int 5
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.0.36
}
}
#REAL_SERVER_1
virtual_server 192.168.0.36 80 {
delay_loop 6
lb_algo wlc
lb_kind DR
persistence_timeout 60
protocol TCP
real_server 192.168.0.38 80 {
weight 100
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
#REAL_SERVER_2
real_server 192.168.0.162 80 {
weight 100
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
}

至于排错，大家有问题，可留言~