Prometheus
Prometheus is an open-source monitoring and alerting toolkit designed for reliability and scalability. It collects metrics from configured targets at specified intervals, evaluates rule expressions, and triggers alerts when specified conditions are observed. Prometheus stores all data as time-series, making it ideal for monitoring application and system performance over time. Its powerful query language, PromQL, allows for real-time data analysis, and its flexible integrations support various exporters and service discovery mechanisms. Prometheus can also integrate with alerting tools like Alertmanager to send notifications via email, Slack, or other channels. With native support for Docker, Kubernetes, and other container platforms, Prometheus provides deep visibility into modern infrastructure and services.