Grafana (Central Observability Platform) Type: Monitoring & Visualization Service Role: Grafana operates as the central observability and analytics layer, aggregating metrics from all infrastructure nodes (Dell Phoenix + Raspberry Pis). It presents dashboards, alerts, and visualizations that enable real-time insight into system health, performance, and capacity. Key architectural functions: • Consumes metrics from Node Exporter endpoints over HTTP. • Hosts dashboards (Grafana Dashboard element). • Deployed via docker-compose (as shown in Observability compose file). • Serves as a stateless frontend requiring persistent configuration storage (volume or DB). Importance: Grafana provides the single-pane-of-glass required to operationalize and supervise your distributed compute resources.