Prometheus

Prometheus is the cloud-native standard for metric collection. Prometheus 3.0 (2025) features a modern UI, Native Histograms, and direct OpenTelemetry (OTLP) ingestion.

When to Use

• Kubernetes: Standard monitoring stack (Prometheus Operator).
• White-box Monitoring: Measuring internal state (heap usage, request count) via endpoints.
• Alerting: Alertmanager handles de-duplication and routing to Slack/PagerDuty.

Quick Start

# prometheus.yml
global:
  scrape_interval: 15s