Prometheus is an open-source monitoring and alerting system designed for reliability and scalability. It specializes in collecting time-series data, allowing developers to track how metrics like CPU usage, memory, or website traffic change over time.
Using a pull-based model, it "scrapes" data from various services and stores it in a custom database. With its powerful query language, PromQL, users can analyze performance in real-time. It is the industry standard for monitoring modern, cloud-native environments like Kubernetes, ensuring that technical issues are detected and alerted before they impact users.