/fail to a ping URL and use it to actively signal a failure.
/fail URL will immediately mark the check as "down".
You can use this feature to minimize the delay from your monitored service failing
to you getting a notification.
The below shell script sends sends either a "success" or "failure" ping depending on command's (certbot in this example) exit code:
#!/bin/sh url=https://cronmon.science.ru.nl/ping/your-uuid-here /usr/bin/certbot renew if [ $? -ne 0 ]; then url=$url/fail; fi curl --retry 3 $url
Below is a skeleton code example in Python which signals a failure when the work function returns an unexpected value or throws an exception:
import requests URL = "https://cronmon.science.ru.nl/ping/your-uuid-here" def do_work(): # Do your number crunching, backup dumping, newsletter sending work here. # Return a truthy value on success. # Return a falsy value or throw an exception on failure. return True success = False try: success = do_work() finally: # On success, requests https://cronmon.science.ru.nl/ping/your-uuid-here # On failure, requests https://cronmon.science.ru.nl/ping/your-uuid-here/fail requests.get(URL if success else URL + "/fail")