如何使用nginx和docker代理应用程序

我得到了一个 5#5: *23 upstream timed out (110: Connection timed out) while connecting to upstream, client: nginx出错。

我已经阅读并应用了 Nginx reverse proxy causing 504 Gateway Timeout 问题。但是我的情况有点不同,因为我有三个端点要代理。

我的nginx.conf:

worker_processes 1;

events { worker_connections 1024; }

http {

     server {
        listen       80;
        listen       [::]:80;
        server_name  rollcall;

          location /api {
            proxy_set_header   X-Real-IP $remote_addr;
            proxy_set_header   Host      $http_host;
            proxy_http_version 1.1;
            proxy_set_header Connection "";
            proxy_pass "http://[hostip]:8080/api";
        }

          location /api/attendance {
            proxy_set_header   X-Real-IP $remote_addr;
            proxy_set_header   Host      $http_host;
            proxy_http_version 1.1;
            proxy_set_header Connection "";
            proxy_pass "http://[hostip]:8000/api";
      }

           location / {
            include /etc/nginx/mime.types;
            root /usr/share/nginx/html;
            index index.html index.htm;
            try_files $uri $uri/ /index.html =404;

            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
            proxy_set_header Host $host;

                        proxy_read_timeout 3600s;
                        proxy_send_timeout 3600s;


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


  }

}

My“/”和端口为8080的应用程序按预期代理,但是端口为8000的应用程序不代理,并得到上述超时异常。如果尝试使用端口8000请求应用程序,则应用程序将按预期工作。

什么可能导致上述超时,以及我应该如何更改我的conf文件?