showing 502 Bad Gateway after successfully setup nginx on virtual machine

Dipendar Singh 0 Reputation points

setup the nginx on the azure virtual machine. its worked fine for 5 to 10 minutes later then showing the error 502 Bad Gateway

nginx/1.18.0 (Ubuntu)

Azure Virtual Machines
Azure Virtual Machines
An Azure service that is used to provision Windows and Linux virtual machines.
7,122 questions
0 comments No comments
{count} votes

1 answer

Sort by: Most helpful
  1. Jackson Martins 9,646 Reputation points MVP


    Will start with couple of steps about you environment

    The first step is to check the Nginx error logs for any specific error messages that might indicate what's wrong. These logs are often located at /nginx/error.log on Ubuntu systems.

    Look for any recent entries that occur around the time you receive the "502" error. The messages here can give you a clue about what's going wrong

    Since the error suggests Nginx cannot communicate with your backend service, ensure the service is running correctly, just like:

    sudo systemctl status php7.x-fpm

    If you're using Nginx as a reverse prxy, these settings adjust the buffering of responses from proxied servers, Try to Increase the prxy Buffer Size

    proxy_buffer_size   128k;
    proxy_buffers   4 256k;
    proxy_busy_buffers_size   256k;

    If you're using FastCGI (common with PHP-FPM), these settings adjust how Nginx buffers the response from the FastCGI server:

    fastcgi_buffer_size 16k;
    fastcgi_buffers 4 16k;
    fastcgi_busy_buffers_size 32k;

    Get in touch if you need more help with this issue.

    --please don't forget to "[Accept the answer]" if the reply is helpful--

    0 comments No comments