How to specify a port number for pm2

node.js heroku pm2
Luke W picture Luke W · Jul 19, 2015 · Viewed 56.9k times · Source

I'm trying to use pm2 to manage a node.js cluster

pm2 start . -i 3

I'm currently running the app on heroku and using a Procfile with the above command, but I cannot figure out how to configure pm2 to use the existing PORT env var. Something like pm2 start . -p $PORT

What am I missing?

Answer

stdob-- picture stdob-- · Jul 19, 2015

You can use environment variable. For example:

1) NODE_PORT=3002 pm2 start -I 0 app.js

2) Read value in app:

console.log(process.env.NODE_PORT);

Or, if you are build express app:

1) PORT=3002 pm2 start -I 0 ./bin/www

2) Express load PORT automatically at start application.

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