What is Prometheus used for?

Prometheus is an open-source monitoring and alerting system.

Its main purpose is to collect metrics from applications and infrastructure, store this data, and provide a convenient query language for analysis.

Prometheus allows:

• Collecting real-time metrics using a pull model (the service itself exposes metrics over HTTP).
• Storing time series data with labels for flexible filtering.
• Setting up alerts based on metrics to respond quickly to issues.
• Visualizing data through integration with Grafana.

An example of a metric in Prometheus format:

http_requests_total{method="GET",handler="/api"} 1027

Thus, Prometheus helps maintain system stability and performance, quickly identify and fix malfunctions.