Monitoring & Alerting

I built this from scratch during my IBM apprenticeship at AMETRAS, not just configured someone else's setup. My supervisor scoped it, what needed checking: disk space, main processor load, VPN connections, and more, and I was in charge of actually building and running it.

That meant writing the scripts myself: gathering the real data from each system and formatting the output the way Nagios and Naemon expect it, then wiring the whole pipeline together end to end.
See Nagios, Nagstamon & Naemon for the tools themselves.

The underlying skill is the same wherever I land: decide what "healthy" means for a system, watch for the moment it stops being true, and make sure I find out fast instead of a user or a customer finding out first.