I've built a bunch of munin plugins that monitor various back-end services. If the metrics dip below thresholds set in
munin.conf, we're notified by email. However, if one of these services goes down completely, the plugin will fail and nobody gets notified!
I've followed the module-writing guide and added an exit code and message:
sys.stderr.write('Error connecting to %s: %s\n' % (name, e)) sys.exit(2)
But this only appears in the log. Nobody is watching the log.
Is there a way to make Munin alert on a complete plugin failure?