Monit is also a great tool for this, it can do different response statuses, check cert expiry, allows for some logic like "failed for 3 cycles" where a cycle is

Monit is also a great tool for this, it can do different response statuses, check cert expiry, allows for some logic like "failed for 3 cycles" where a cycle is typically 30 seconds, and lots of other options. It's also very useful and powerful for any other monitoring. I even have it checking for ZFS problems, failed fans and high temperatures in my DAS shelves, and all the standard service monitoring. https://mmonit.com/monit/documentation/monit.html#HTTP https://mmonit.com/monit/documentation/monit.html#HTTP