Unable to fix NGINX 502: Bad Gateway error on a Digital Ocean droplet - Ubuntu 20.04

Question

I have deployed my website to a Digital Ocean droplet (Ubuntu 20.04 server).

Everything was working fine. Today, I did some changes to the website in my local machine. So I pushed the changes to GitHub and then cloned the GitHub repo again to the server. Then, I installed the dependencies and restarted PM2.

Now, when I visit my site https://sundaray.io, I get the following error.

The following is the error log.

How can I fix the error?

Dorton

looks like your node as not running properly with pm2 please check it – Mcfarland

502 gateway mean server and Nginx is getting your request but there is issue with upstream. – Mcfarland

try running the node server with pm2 and check application getting crashed or other 500 error.. – Mcfarland

Same as last time. Please share sudo nginx -T output. From what I can see your configuration need some general cleanup. – Adrian

I figured out the problem. I have to create a .env file. By the way, why can't I copy paste code from VS code to VIM? I tried ctrl+v and ctrl+shift+v, but doesn't work. – Dorton

Everything ok now. The server is working fine. – Dorton

Thanks Timo and Harsh for your prompt responses. You guys are the best. – Dorton

Answer 1

Simple meaning is

No HTTP server response, your Node Http server is not answering requests.

502 gateway mean server and Nginx is getting your request but there is issue with upstream.

you can use the command to show the logs of pm2

pm2 show

the application might be crashing or internal server 500 error.

Mcfarland