[$] Monitoring with Prometheus 2.0

Prometheus is a monitoring toolbuilt from scratch by SoundCloud in 2012. It works by pulling metrics frommonitored services and storing them in a time series database (TSDB). Ithas a powerful query language to inspect that database, create alerts, andplot basic graphs. Those graphs can then be used to detect anomalies ortrends for (possibly automated) resource provisioning. Prometheus also hasextensive service discovery features and supports high availabilityconfigurations.That's what the brochure says, anyway; let's see how it works in the handsof an old grumpy system administrator. I'll be drawing comparisonswith Munin and Nagios frequently because those are the tools I haveused for over a decade in monitoring Unix clusters.