keepalived 多VIP案例实施

实验环境：

首先关闭防火墙

192.168.200.111 主调度器

192.168.200.112 备调度器

192.168.200.113 Apache服务器

192.168.200.114 Apache服务器

一利用keepalived实验主备故障切换

111主调度器的配置

[root@localhost ~]# yum -y install ipvsadm keepalived

cd /etc/keepalived/

cp keepalived.conf keepalived.conf.bak

vim keepalived.conf

[root@localhost keepalived]# vim keepalived.conf

! Configuration File for keepalived

global_defs {
notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 192.168.200.1
smtp_connect_timeout 30
router_id LVS_MASTER ##备用的可以改成BACKUP
vrrp_skip_check_adv_addr
vrrp_strict
vrrp_garp_interval 0
vrrp_gna_interval 0
}

vrrp_instance VI_1 { ##主备名字一样
state MASTER
interface ens32 #生命线，与本机网卡名字保持一致，备用的改成BACKUP
virtual_router_id 51 ##主备名字一致
priority 100 ##备用优先级低于主调度器
advert_int 1

authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress { #VIP地址
192.168.200.254
}
}

virtual_server 192.168.200.254 80 { #VIP地址及端口
delay_loop 6
lb_algo rr ##模式
lb_kind DR
protocol TCP

real_server 192.168.200.113 80 { ##节点IP地址，以及端口
weight 1
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}

real_server 192.168.200.114 80 {
weight 1
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
}

systemctl start keepalived

ip a 查看是否有192.168.200.254这个VIP

ipvsadm -Ln 查看

scp keepalived.conf root@192.168.200.112:/etc/keepalived/

112修改完配置文件开启服务即可

113和114的配置：

yum -y install httpd

ifconfig lo:0 192.168.200.254 netmask 255.255.255.255

route add -host 192.168.200.254 dev lo:0 ##添加路由

ip a #查看

echo "3333" > /var/www/html/index.html

systemctl start httpd

vim /etc/sysctl.conf

net.ipv4.conf.all.arp_ignore = 1
net.ipv4.conf.all.arp_announce = 2
net.ipv4.conf.default.arp_ignore = 1
net.ipv4.conf.default.arp_announce = 2
net.ipv4.conf.lo.arp_ignore = 1
net.ipv4.conf.lo.arp_announce = 2

sysctl -p

测试