How to properly deploy a NodeJS daemon?

Question

Node.js

Good afternoon!
I have a simple js daemon that should always be running. How to properly configure its operation so that there is no downtime when uploading new code?
I now have a part of the requests, literally within 200 milliseconds they receive 404 errors.
I tried to run it through pm2, forever...
There must be some way, nginx normally handles a similar situation....

Answer 1

Docker+nginx. Your application is in a docker container. You roll out a new version - raise a new container, as soon as it has risen, switch nginx to a new container and extinguish the old one. Well, or run an application on a different port without a docker container, change the ENV variable, reload (not restart) nginx.

Answer 2

In general, when I was looking, I found the reload method in pm2. I think this is exactly what I need, but it only works with the 0.11.x node.
We solved the current problem using nginx.
Thanks for the help!