You should know about... these useful Prometheus alerting rules
Setting up Prometheus to scrape your targets for metrics is usually just one part of your larger observability strategy. The other piece in the equation is figuring out what you want your metrics to tell you and when and how often you should know about it. Thankfully, Prometheus makes it really easy for you to define alerting rules using PromQL, so you know when things are going north, south, or in no direction at all.