PM2 and Nginx: 502 Bad Gateway

问题

I've been trying to deploy my Node project on a brand new DO droplet, but i'm having some problems with PM2.

My steps are a follows:

1. Node came installed on the Droplet image (Ubuntu, Node v4.4.4)
2. Installed PM2 globally
3. Setup Nginx to reverse proxy 127.0.0.1:3000
4. Cloned my project and did npm install

All i get is Nginx complaining about a 502 Bad Gateway.

If i look at the Nginx error.log i get this:

connect() failed (111: Connection refused) while connecting to upstream, client: client.ip, server: my.server, request: "GET / HTTP/1.1", upstream: "http://127.0.0.1:3000/", host: "my.server"

PM2 doesn't have much to say about anything. Nothing in pm2 logs and status is online.

I tried skipping PM2 and just doing npm start which worked perfectly. I also tried setting up a dummy hello world application instead, and using that with PM2 - it also worked.

So this is currently where i'm at:

• My project + PM2: doesn't work.
• My project without PM2: works.
• Hello World app + PM2: works.

I'm not really sure where to go from here.. I could just skip PM2 and use node, but i do want the features of PM2.

Any ideas?

回答1:

I just had to start PM2 with bin/www instead of app.js. Express generator and everything...

来源：https://stackoverflow.com/questions/37410822/pm2-and-nginx-502-bad-gateway