Question

Is it possible to open two external ports on one app?

Posted on December 3, 2020
DigitalOcean App Platform
Asked by musantro

I created a nodejs web service which should be listening via socket from outside on one TCP port (let’s say 5000) which also serves via another websocket (port 3000) and updates a frontend.

I’ve seen the app spec documentation but I can only open up 1 port from outside with http_port.

Is it possible to open two external ports?

Thank you in advance and best regards

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Kamal Nasser

DigitalOcean Employee

• December 4, 2020

Accepted Answer

Hi, it’s currently not possible to expose multiple external ports on a Service. If it works with your setup you could use the same websocket server and put the existing servers under separate path prefixes.

3df2f878eb244f5a8033040114b07c • October 1, 2023

Please consider allowing App Service to expose multiple ports.

Denislav Gavrilov • December 4, 2020

Hey @musantrobeatsdev,

I took a look at some google searches and found this one

So basically, you do the following:

var http = require('http');

http.createServer(onRequest_a).listen(9011);
http.createServer(onRequest_b).listen(9012);

function onRequest_a (req, res) {
  res.write('Response from 9011\n');
  res.end();
}

function onRequest_b (req, res) {
  res.write('Response from 9012\n');
  res.end();
}

You create two HTTP instances and write two different requests. You can then test with curl.

Let me know if that helps!

Best, Dennis