Just like any other application that is instrumented with Prometheus metrics, the Prometheus and Alertmanager servers also expose detailed metrics about their own inner workings. These metrics are the best way of continuously monitoring a Prometheus-based monitoring setup. In the next sections, we will look at the types of metrics that are available, how to structure a robust meta-monitoring architecture, how to build an end-to-end monitoring pipeline test, and what concrete meta-monitoring alerting rules can look like.