Grafana Dashboard Type: User Interface / Monitoring View Role: This represents the visual layer of the observability solution. It is not a separate system but a logical component within Grafana. Functions: • Provides curated visualizations of node CPU, memory, disk, and network metrics. • Custom dashboards for Raspberry Pi cluster and Dell Phoenix server. • Supports alert rules and threshold-based notifications. Relationship to Grafana: • Physically hosted and executed within the Grafana application. • End users consume dashboards through Grafana’s web UI. 3. (Observability) docker-compose.yml Type: Deployment Artifact (Configuration) Role: This file orchestrates the deployment lifecycle of the Grafana instance and any supporting containers (e.g., Prometheus in future; currently Node Exporter operates standalone on each machine). Architecture functions: • Defines service images, ports, volumes, environment variables. • Enables repeatable, declarative infrastructure provisioning. • Ensures that Grafana is consistently deployed across updates. Why it matters: docker-compose acts as your Infrastructure-as-Code (IaC) entry point for observability, supporting reproducibility and environment portability.