How to specify a port number for pm2

Question

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 abov

Answer 1

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.