Prometheus is an open source monitoring solution. Prometheus supports aggregating high dimensional data and exposes a powerful query language PromQL. This charm deploys and operates Prometheus on Kubernetes clusters. Prometheus can raise alerts through a relation with the Altermanager charm. Alerting rules for Prometheus need to be provided through a relation with the application that requires alerting. Prometheus provides its own dashboard for data visualization but a richer visualization interface may be obtained through a relation with the Grafana charm.