How to auto-restart Apache in the presence of 502nd and 504th errors?

Question

Nginx

How to auto-restart Apache in the presence of 502nd and 504th errors?
When an error 502 pops up on the site, 504 to give the command to restart Apache.
I've looked all over the internet and can't find it. Axis FreeBSD
PS if apache completely dies, then there is another script that will start it.

Answer 1

Make a bash script with a curl request to the site. Get the header, parse the response code, and based on this, either restart or do nothing. Script in cron once per minute.

Answer 2

bash which reads the error log.
as soon as it finds traces of 502 or 504 errors there, Apache restarts.

Answer 3

as an example - https://gist.github.com/xi4oh4o/4378447