Resolved Cannot make nodejs application listen on different port

[proton23]

Server operating system version

Ubuntu 20.04.6 LTS

Plesk version and microupdate number

Plesk Obsidian 18.0.52

Hello,
I was finally able to make openhab cloud work.
The application is listening on port 3000 and I would like to change this since Dr.Web is using this port.
The code of app.js contains this line.

app.set('port', process.env.PORT || 3000);

I tried to set env variable PORT to 3001, without any change.
Even if I change it to

app.set('port', 3001);

the app will always start on port 3000

Is there a way to tell a nodejs app witch port to listen to, on start up?

Best regards

 

[Maarten]

Passenger uses a fixed port that cannot be changed, but this article suggests using a dynamic port that can be set using an environment variable:

https://support.plesk.com/hc/en-us/articles/12377014316823-Is-it-possible-to-change-Node-js-application-port-in-Plesk-

 

[proton23]

Thanks for the reply!
I'm not quite sure how this is supposed to work.
Isn't

app.set('port', process.env.PORT || 3000);

nearly what was suggested in the article?
And where will the port be set?

Best regards

 

[proton23]

In the articel it is suggested to use

port = process.env.PORT

I'm sorry but I don't know how to do this. Can somebody please explain?

 

[proton23]

So the support fixed my problem but in a different way. Not the port of the node.js application was changed but the port of the Plesk Antivirus Service.
Since it can break every time through an update they told me how to fix it.

 grep -R 2999 /etc/drweb/
/etc/drweb/drweb_handler.conf:Address = inet:2999@localhost
/etc/drweb/drweb32.ini:Socket = 2999, localhost

With this changes drweb is now listening on port 2999.

Best regards

 

[proton23]

Sorry, but I can not see how the thread can be set to "resolved"