Munin Watchdog service

Drupal can provide a Munin heartbeat check too: Munin API can log events if the Munin probe interval deviates from the expected, with 2 levels of severity depending on the deviation: one missed probe could trigger a warning and two a critical.

Munin API

This module is an API-type Drupal module to help other modules expose their internal instrumentation to Munin, mostly used by sub-modules and custom code to expose business metrics.