四月学习之LVS 四层负载均衡+七层负载均衡+web站点

1、所有应用服务器配置

[root@web01 ~]# vim /etc/nginx/conf.d/lvs.qingchen.net.conf
server {
        listen 80;
        server_name lvs.qingchen.net;
        root /opt;

        location / {
                index index.html;
        }
}

[root@web01 ~]# nginx -t
[root@web01 ~]# systemctl reload nginx

2、配置七层负载均衡

[root@proxy02 ~]# vim /etc/nginx/conf.d/proxy_lvs.qingchen.net.conf
upstream lvs {
        server 172.16.1.7:80;
        server 172.16.1.8:80;
}
server {
        listen 80;
        server_name lvs.qingchen.net;

        location / {
                proxy_pass http://lvs;
                include proxy_params;
        }
}

nginx -t
systemctl reload nginx

sh lvs_rs.sh    一定不要忘记配置RS节点的VIP和Arp抑制（网络环境按照预期已经配置好了）

3、接入四层负载均衡

接入四层负载均衡【keeplaived中定义是永久，命令行是临时】
[root@lvs01 ~]# ipvsadm -A -t 172.16.1.100:80 -s rr
[root@lvs01 ~]# ipvsadm -a -t 172.16.1.100:80 -r 172.16.1.5:80 -g
[root@lvs01 ~]# ipvsadm -a -t 172.16.1.100:80 -r 172.16.1.6:80 -g

[root@lvs01 ~]# ipvsadm -L -n 
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  172.16.1.100:80 rr
  -> 172.16.1.5:80                Route   1      0          0         
  -> 172.16.1.6:80                Route   1      0          0

4、路由器端口转发

iptables -t nat -A PREROUTING -d 10.0.0.200 -p tcp --dport 80 -j DNAT --to 172.16.1.100:80