用于前端服务器和后端服务器的AWS负载均衡器

Question

我正在尝试在AWS中加载平衡前端（公共）和后端（私有）服务器。我让nginx文件使用带有IP地址的单个服务器，但是loadbalancer DNS名称似乎不起作用，下面是我的前端服务器的nginx.conf。在负载均衡器的监听器部分，负载均衡器端口是443，实例端口是9000.任何建议都非常赞赏。

... WORKING

    server {
        listen       80;
    rewrite ^(.*) https://example.com$request_uri;
}


server {
        listen       443;
    ssl    on;
    ssl_certificate    /etc/ssl/chain.crt;
    ssl_certificate_key    /etc/ssl/key.crt;
        listen       localhost:443;
    server_tokens off;
    client_max_body_size 300M;
        location / {
            root   /var/www/html;
            index  index.html index.htm;
        }
      location /api/ {
        proxy_set_header X-Real-IP $remote_addr;
        proxy_pass https://<BackendIP>:9000/api/;
        proxy_set_header Host $http_host;
        }  
}
}

不工作......

    server {
        listen       80;
    rewrite ^(.*) https://example.com$request_uri;
}


server {
        listen       443;
    ssl    on;
    ssl_certificate    /etc/ssl/chain.crt;
    ssl_certificate_key    /etc/ssl/key.crt;
        listen       localhost:443;
    server_tokens off;
    client_max_body_size 300M;
        location / {
            root   /var/www/html;
            index  index.html index.htm;
        }
      location /api/ {
        proxy_set_header X-Real-IP $remote_addr;
        proxy_pass https://<LOADBALANCER-DNS>:9000/api/;
        proxy_set_header Host $http_host;
        }  
}
}