r - Shiny 的服务器安装 : Server not responding on port 3838

Question

我在 Ubuntu 16.04.1 上安装了 Shiny 服务器，根据控制台输出，它处于事件状态并正在运行:

    systemctl status shiny-server
● shiny-server.service - ShinyServer
   Loaded: loaded (/etc/systemd/system/shiny-server.service; enabled; vendor preset: enabled)
   Active: active (running) since Wed 2016-08-24 18:17:09 CEST; 15h ago
  Process: 13175 ExecStartPost=/bin/sleep 3 (code=exited, status=0/SUCCESS)
 Main PID: 13179 (shiny-server)
    Tasks: 7
   Memory: 28.5M
      CPU: 158ms
   CGroup: /system.slice/shiny-server.service
           ├─13174 /bin/bash -c /opt/shiny-server/bin/shiny-server --pidfile=/var/run/shiny-server.p
           └─13179 /opt/shiny-server/ext/node/bin/shiny-server /opt/shiny-server/lib/main.js --pidfi
lines 1-11/11 (END)

然后我按照安装指南中的说明打开了 3838 端口:

netstat -ntlp | grep LISTEN
(Not all processes could be identified, non-owned process info
 will not be shown, you would have to be root to see it all.)
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      -
tcp        0      0 0.0.0.0:3838            0.0.0.0:*               LISTEN      -
tcp6       0      0 :::80                   :::*                    LISTEN      -
tcp6       0      0 :::22                   :::*                    LISTEN      -

sudo ufw status
Status: active

To                         Action      From
--                         ------      ----
22/tcp                     ALLOW       Anywhere
3838/tcp                   ALLOW       Anywhere
80/tcp                     ALLOW       Anywhere
22/tcp (v6)                ALLOW       Anywhere (v6)
3838/tcp (v6)              ALLOW       Anywhere (v6)
80/tcp (v6)                ALLOW       Anywhere (v6)

但是，如果我尝试在浏览器中通过端口 3838 访问我的服务器，我没有收到来自服务器的任何响应，并且该站点保持空白并最终超时。

有什么想法我可能会错过吗？

Answer 1

显然我的服务器上的端口 3838 有问题。尽管上面的控制台输出表明它已打开并列为“LISTEN”，但它仍然不起作用。当我将配置文件(/etc/shiny-server/shiny-server.conf)中 Shiny 服务器的默认端口更改为 80 时，它突然起作用了:

    # Define a top-level server which will listen on a port
    server {
       # Instruct this server to listen on port 3838
       listen 80;
       ...