http
    {
    ...
    upstream nas {
        ip_hash; #确保会话在同一服务
        server 127.0.0.1:8222;
        server 127.0.0.1:8223;
        ...
    }
    ...
   
#PROXY-START
location ^~ /
{
    proxy_pass http://nas; #反向代理NAS池对应端口服务 
    proxy_set_header Host $host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header REMOTE-HOST $remote_addr;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection $connection_upgrade;
    proxy_http_version 1.1;
    # proxy_hide_header Upgrade;
    add_header X-Cache $upstream_cache_status;
}
#PROXY-END/
...
}