How to save failed requests to the server?

Question

System administration

There are situations when, for one reason or another, our server crashes with errors 500, 502, etc. when requested from outside. It is clear that it is necessary to solve problems with the occurrence of these same errors, but the question is different - are there any tools to save such unsuccessful requests? So that we can then restart them ourselves.
Service in php.

Answer 1

Such HTTP requests should be logged.
For example, about the log in nginx https://ruhighload.com/%d0%9b%d0%be%d0%b3%d0%b8+er...