130端

[root@130 ~]# cd /usr/local/nginx/conf/
[root@130 conf]# vim nginx.conf
...
http {
...
    upstream web {                        #添加此处内容
    server 192.168.118.131;
    server 192.168.118.132;
    }

    server {
        listen       80;
        server_name  localhost;

        location / {
            root   html;
            proxy_pass http://web;         #修改为proxy_pass http://web;
        }
...
}
...

#重启服务开始访问
[root@130 conf]# systemctl restart nginx.service

[root@130 conf]# curl 192.168.118.130
web111
[root@130 conf]# curl 192.168.118.130
web222
[root@130 conf]# curl 192.168.118.130
web111
[root@130 conf]# curl 192.168.118.130
web222

#先关闭，后面高可用需要将130端的nginx关掉
[root@130 ~]# systemctl stop nginx.service

部署keepalived高可用

129端

#安装keepalived
[root@129 ~]# dnf -y install keepalived

#编辑配置文件
[root@129 ~]# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
 
global_defs {
   router_id lb01
}
 
vrrp_instance VI_1 {
    state 129
    interface ens33
    virtual_router_id 51
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 123456
    }
    virtual_ipaddress {
        192.168.118.250
    }
}
 
virtual_server 192.168.118.250 80 {
    delay_loop 6
    lb_algo rr
    lb_kind DR
    persistence_timeout 50
    protocol TCP
 
    real_server 192.168.118.129 80 {
        weight 1
        TCP_CHECK {
            connect_port 80
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
        }
    }
 
    real_server 192.168.118.130 80 {
        weight 1
        TCP_CHECK {
            connect_port 80
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
        }
    }
}

[root@129 ~]# systemctl enable --now keepalived.service
[root@129 ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 00:0c:29:b5:9a:13 brd ff:ff:ff:ff:ff:ff
    inet 192.168.118.129/24 brd 192.168.118.255 scope global dynamic noprefixroute ens33
       valid_lft 1539sec preferred_lft 1539sec
    inet 192.168.118.250/32 scope global ens33
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:feb5:9a13/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever

#通过vip访问，130端的nginx需要关闭

[root@129 ~]# curl 192.168.118.250
web111
[root@129 ~]# curl 192.168.118.250
web222
[root@129 ~]# curl 192.168.118.250
web111
[root@129 ~]# curl 192.168.118.250
web222

130端