This post stands in as a tutorial for prometheus.ex. The gold standard in Elixir app monitoring has long been Exometer with StatsD, which, let me tell you right now, is an awful nightmare to set up. A bunch of crusty forks and hacks depending on super-specific versions of one another – I tried, failed, and gave up. Fortuitously, Ilya Khaprov just a few days ago published a bunch of Elixir packages