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keepalived+lvs（DR）

news 2025/7/19 19:38:18

一，作用

二，调度器配置

1，安装keepalived

2，安装ipvsadm

3，配置keepalived

4. 查看lvs节点状态

5， web节点配置

1.1 调整ARP参数

1.2 配置虚拟IP地址

1.3添加回环路由

1.4安装nginx并写入文件

1.5 网站查看

6，断掉主测试备

一，作用

使用keepalived解决lvs的单点故障
高可用集群

二，调度器配置

1，安装keepalived

yum install -y keepalived

2，安装ipvsadm

yum install -y ipvsadm
modprobe ip_vs

lsmod |grep ip_vs

3，配置keepalived

主

! Configuration File for keepalived

global_defs {
router_id LVS_DEVEL1
}

vrrp_instance VI_1 {
state MASTER
interface ens33
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.115.200
}
}

virtual_server 192.168.115.200 80 {
delay_loop 6
lb_algo rr
lb_kind DR
#persistence_timeout 50
protocol TCP

real_server 192.168.115.4 80 {
weight 1
HTTP_GET {
url {
path /
}
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
real_server 192.168.115.5 80 {
weight 1
HTTP_GET {
url {
path /
}
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
}

从

! Configuration File for keepalived

global_defs {
router_id LVS_DEVEL2
}

vrrp_instance VI_1 {
state BACKUP
interface ens33
virtual_router_id 51
priority 90
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.115.200
}
}

virtual_server 192.168.115.200 80 {
delay_loop 6
lb_algo rr
lb_kind DR
# persistence_timeout 50
protocol TCP

重启服务

4. 查看lvs节点状态

ipvsadm -ln

5， web节点配置

1.1 调整ARP参数

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