DevOps Intermediate

What is Prometheus?

An open-source monitoring and alerting toolkit that collects time-series metrics using a pull-based model.

Prometheus scrapes metrics from instrumented targets at configured intervals. It stores data in a time-series database and provides PromQL (Prometheus Query Language) for powerful querying. Alertmanager handles alert routing and notification.

Key concepts include metrics types (counter, gauge, histogram, summary), labels for dimensional data, service discovery, and recording rules. Prometheus + Grafana is the de facto standard for Kubernetes monitoring.

Related Terms

A tool for creating identical machine images for multiple platforms from a single configuration file.

An open-source analytics and visualization platform for creating dashboards from various data sources.

A server that acts as the single entry point for API requests, handling routing, authentication, rate limiting, and monitoring.

A communication mechanism that enables asynchronous message passing between services, decoupling producers from consumers.

The ability to understand a system's internal state from its external outputs through metrics, logs, and traces.

Trunk-Based Development

A source control strategy where developers integrate small changes directly into the main branch frequently, often multiple times per day.

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