error: "failed to bind to $PORT within 60 seconds of launch - deploying with Heroku - port

[danieltkach]

First time deploying a Fastify app. This is what I'm getting atheroku's console:

2022-03-15T21:23:03.746388+00:00 app[web.1]: > fastify start -p process.env.PORT -l info app.js
2022-03-15T21:23:03.746388+00:00 app[web.1]: 
2022-03-15T21:23:04.406675+00:00 app[web.1]: {"level":30,"time":1647379384406,"pid":22,"hostname":"03dc971b-267f-422e-a78c-a10a0f8ff203","msg":"Server listening at http://127.0.0.1:10616"}
2022-03-15T21:24:03.185036+00:00 heroku[web.1]: Error R10 (Boot timeout) -> Web process failed to bind to $PORT within 60 seconds of launch
2022-03-15T21:24:03.218992+00:00 heroku[web.1]: Stopping process with SIGKILL
2022-03-15T21:24:03.237619+00:00 app[web.1]: Error waiting for process to terminate: No child processes
2022-03-15T21:24:03.385607+00:00 heroku[web.1]: Process exited with status 22
2022-03-15T21:24:03.441486+00:00 heroku[web.1]: State changed from starting to crashed
2022-03-15T21:24:05.696324+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=swamijis-spiritual-pearls.herokuapp.com request_id=2ea5e367-410f-421b-b0d6-0c4d3d4fd48d fwd="190.14.32.12" dyno= connect= service= status=503 bytes= protocol=https

At my package.json I got:
"start": "fastify start -p process.env.PORT -l info app.js",

What am I doing wrong?

[mcollina]

You need to see the host to listen to 0.0.0.0.

[danieltkach]

Hi Matteo, how do I do that?...

[jsumners]

Please read the documentation https://www.fastify.io/docs/latest/Reference/Server/#listen

[danieltkach]

I had to add "-a '0.0.0.0' since I'm using fastify-cli.
Do you recommend that way or should I use the listen command generally @jsumners ?

[jsumners]

I am not familiar with fasity-cli.

[Eomm]

fastify-cli calls the listen method for you, so it is good 👍

[elvinagam]

Just spent several hours on this coz I did not read the docs at the first place))

if you are developing an app which does not need UI, then use worker instead of web on Procfile.

In the procfile, instead of using: web: python app.py
use this: worker: python app.py

after you push everything to heroku git, make sure to: heroku scale worker=1