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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

Trunk-Based Development
A source control strategy where developers integrate small changes directly into the main branch frequently, often multiple times per day.
Service Discovery
A mechanism that automatically detects and tracks the network locations of service instances in distributed systems.
Packer
A tool for creating identical machine images for multiple platforms from a single configuration file.
Docker Compose
A tool for defining and running multi-container Docker applications using a YAML configuration file.
Environment Variable
A dynamic value stored outside the application code that configures behavior without hardcoding sensitive or environment-specific data.
ELK Stack
A popular log management platform combining Elasticsearch (search), Logstash (processing), and Kibana (visualization).
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