Prometheus

Prometheus is an open-source monitoring system and time series database widely used in cloud-native environments, especially alongside Kubernetes. It scrapes metrics at regular intervals from applications and systems that expose them, directly through client libraries or through exporters, and stores them as time series identified by a name and a set of labels. Engineers query the data with PromQL, its query language, to build dashboards, usually in Grafana, and to define alerting rules. A separate component, Alertmanager, groups, routes and silences notifications. It is a project of the Cloud Native Computing Foundation, and is used by DevOps, platform and site reliability engineering teams.