Introduction

A visualization and alerting platform.

Query UI
- PromQL is executed by Prometheus, not Grafana
- Grafana forwards queries, Prometheus evaluates them
Dashboarding tool
Alerting system (modern Grafana)

// Does NOT store/scrape/collect metrics

Grafana Architecture

+----------------+
|   Grafana UI   |
+----------------+
        |
        v
+----------------+
| Data Sources   |
| (Prometheus)  |
+----------------+
        |
        v
+----------------+
| Query Engine   |
|  (PromQL)      |
+----------------+

Data Sources

Data Source	Type
Prometheus	Metrics
Loki	Logs
Tempo	Traces
MySQL / Postgres	SQL
Elasticsearch	Logs / Search

Grafana Storage

Grafana stores Dashboards, Alerts, Users in:

SQLite (default)
PostgreSQL / MySQL (prod)

// Does NOT store metrics