pliant bough
Hello everyone,
like in react or next, we can specify the port of our application by provifing it in the command line, like thins :
yarn start -p 3001 (the default port is 3000)
I ask how to can do it with nestjs. how can I read the port from the user and put it at app.listen(READED_PORT). or other mechanism for starting the application in different ports witout changing the .env file or PORT config ?
I hope that my question is clear !
Kind regards 😀
edgy eagle
Do you currently use the PORT from config?
pliant bough
no, I use it from .env file
edgy eagle
Okay, so you get the port from config already, right?
pliant bough
and I use dotenv package, to get PORT via process.env.PORT
and passed it into app.listen()
edgy eagle
If so, you can so PORT=3001 yarn start to override the value that is in the .env (Windows has a different syntax but the idea is the same)
pliant bough
If so, you can so `PORT=3001 yarn start` to override the value that is in the .e...
nice, it works. I tried in windows also using git bash and it works 👌 .
What's about If I want to use the react style using flag like --port 3000 or -p 3000 ?
edgy eagle
You'd have to create a way to read that flag. Nest's CLI doesn't provide that
Technically you'd actually have to use nest start -e 'node -p 3001' to set the execution because nest doesn't forward on flags it doesn't know about
pliant bough
My goal by running the api in different ports is to run the application in different processes , then try to do a load balancing for the free processes to make the application scalable.
is there a way to do that nativeley by nestjs ?
edgy eagle
I would just use nginx for that, I think
Nest's CLI is really for dev mode only and other than that it's pretty much just a structured way to write a node server
pliant bough
I found a pakage called PM2, it is a Node.js Production Process Manager with a built-in Load Balancer.
is there a wrapper for nestjs for this pakage ?
I try to use it with my typescript project to do something like this .
edgy eagle
Why need a nest wrapper for that? Pm2 is a process manager that can run multiple processes (servers) for you. What framework you're using is irrelevant
pliant bough
or what is the builtin features for more scalibity that we have right now for nestjs ?
edgy eagle
Again, nest is just a structured framework for writing a node server.
pliant bough
Ok good, thanks , I get it 😀
ember echo
btw, since you're using PM2, you might be interested in the built in feature: https://pm2.keymetrics.io/docs/usage/environment/
