nginxリバースプロキシをどうするか

http {
    upstream myapp1 {
        server srv1.example.com;
        server srv2.example.com;
        server srv3.example.com;
    }

    server {
        listen 80;
        location / {
            proxy_pass http://myapp1;
        }
}

  upstream gulimall {
        server 192.168.1.7:10001;
    }
        location / {
                proxy_set_header Host $host;
                # proxy_pass http://192.168.1.7:10000;
                proxy_pass http://gulimall;
        }