Render 500 JSON output when invoking REST API calls and render 500 HTML output when accessing UI

[Kaushal Shriyan <kaushalshriyan@xxxxxxxxx>]

Hi,

I am running the nginx version: nginx/1.22 as a reverse proxy server and apache httpd version 2.4.55 as web server on CentOS Linux release 7.9.2009 (Core). Drupal CMS version is 9.5.3 which is a php framework, MySQL DB version is 8.0.32 

User -> https://develop.mydomain.com/user/login

User -> Nginx Reverse Proxy -> Apache Web server -> PHP-FPM -> MySQL DB

1. If MySQL DB is down, then 

Render 500 JSON output to REST API Calls for Internal Server error

(https://develop.mydomain.com/apis)

Render 500 html output to UI for Internal Server error (https://develop.mydomain.com/apis/)

2. PHP-FPM Service is down, then 

Render 502 JSON output to REST API Calls for bad gateway

(https://develop.mydomain.com/apis)

Render 502 html output to UI for bad gateway

(https://develop.mydomain.com/apis)

UI Dashboard :- https://develop.mydomain.com/user/login

REST API Call :- https://develop.mydomain.com/apis

Please guide me. Thanks in advance.

Best Regards,

Kaushal