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  Prometheus + Grafana Setup: Complete Monitoring Stack 📅 Published: June 2026 ⏱️ Estimated Reading Time: 22 minutes 🏷️ Tags: Prometheus, Grafana, Monitoring, Metrics, Observability, DevOps Introduction: Why Prometheus and Grafana? Monitoring is essential for understanding how your applications and infrastructure are performing. You need to know when something is wrong, what caused it, and how to fix it. Prometheus and Grafana together form the most popular open-source monitoring stack: Prometheus collects and stores metrics (CPU usage, memory, request rates, error counts) Grafana visualizes those metrics in dashboards and charts Think of Prometheus as the database that stores your metrics, and Grafana as the visualization layer that helps you understand them. Why this stack is popular: Open source and free Huge ecosystem of exporters and integrations Powerful query language (PromQL) Beautiful, customizable dashboards Active community and extensive documentation Part 1: What is...