LVS_Director + Keepalived 高可用

准备四台服务器
（一台做LVS，一台做keepalived，俩台做web）
在LVS和keepalived上下载
yum -y install ipvsadm keepalived

LVS服务器

修改 vim /etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_defs {
router_id lvs-keepalived-master #辅助改为lvs-backup
}

vrrp_instance VI_1 {
state MASTER
interface ens33 #VIP绑定接口
virtual_router_id 80 #VRID 同一组集群，主备一致
priority 100 #本节点优先级，辅助改为50
advert_int 1 #检查间隔，默认为1s
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.19.110/24 # 可以写多个vip
}
}

virtual_server 192.168.19.110 80 { #LVS配置
delay_loop 3
lb_algo rr #LVS调度算法
lb_kind DR #LVS集群模式（路由模式）
nat_mask 255.255.255.0
protocol TCP #健康检查使用的协议
real_server 192.168.19.130 80 {
weight 1
inhibit_on_failure #当该节点失败时，把权重设置为0，而不>是从IPVS中删除
TCP_CHECK { #健康检查
connect_port 80 #检查的端口
connect_timeout 3 #连接超时的时间
}
}
real_server 192.168.19.131 80 {
weight 1
inhibit_on_failure
TCP_CHECK {
connect_timeout 3
connect_port 80
}
}
}

keepalived服务器

修改 vim /etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_defs {
router_id lvs-keepalived-slave
}

vrrp_instance VI_1 {
state BACKUP #与lvs配置文件不一样
interface ens33
nopreempt #不抢占资源
virtual_router_id 80
priority 50
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.19.110/24
}
}
virtual_server 192.168.19.110 80 {
delay_loop 3
lb_algo rr
lb_kind DR
nat_mask 255.255.255.0
protocol TCP
real_server 192.168.19.130 80 {
weight 1
inhibit_on_failure
TCP_CHECK {
connect_port 80
connect_timeout 3
}
}
real_server 192.168.19.131 80 {
weight 1
inhibit_on_failure
TCP_CHECK {
connect_timeout 3
connect_port 80
}
}
}

俩台wed服务器
yum -y install nginx
ip addr add dev lo 192.168.9.110/32
echo “ip addr add dev lo 172.16.147.101/32” >> /etc/rc.local
echo “net.ipv4.conf.all.arp_ignore = 1” >> /etc/sysctl.conf
sysctl -p