What is Prometheus?
Prometheus is an open-source system for monitoring and alerting on metrics, designed for systems and services. It is used by developers and system administrators to collect and store time-series data from their applications and infrastructure. The platform provides a flexible approach to understanding the performance and health of various components. Users instrument their systems to collect metrics, which Prometheus then stores in an efficient time series database. They can query, correlate, and transform this data using the PromQL query language for visualizations and alerts. A separate Alertmanager component handles notifications and silencing, ensuring that teams are informed of issues.