ginx 反向代理负载均衡配置多个域名同一端口

现在有端口9006 负载均衡了二台虚拟机的二个端口：9006和9016二个端口共四个负载，任何一个有问题都不会影响系统访问，现在有二个域名和一个IP都要指向这个站点，Nginx中的配置如下：

nginx.conf配置如下

#user  nobody;
worker_processes  1;

#error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;

#pid        logs/nginx.pid;


events {
    worker_connections  1024;
}


http {
    include       mime.types;
    default_type  application/octet-stream;
    client_max_body_size 50m;
    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  logs/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    #keepalive_timeout  0;
    keepalive_timeout  65;

    #gzip  on;


    upstream webBO9006{
        #ip_hash;默认将按IP自动轮询方式
        server 192.168.8.1:9006;
        server 192.168.8.1:9016;#不同端口
        server 192.168.8.2:9006;#不同IP
        server 192.168.8.2:9016;
    }
    server {
        listen       9006;
        server_name  a.qq.com b.qq.com 122.122.122.122;

        location / {
            proxy_pass http://webBO9006;#一定要和upstream后面名字一样
            proxy_hide_header Set-Cookie;
            proxy_set_header Host $host:$server_port;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header REMOTE-HOST $remote_addr;
        }

        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }
    }

}