Grafana + Prometheus: monitoraggio avanzato del homelab

Stack di monitoraggio

Per monitoraggio avanzato con metriche dettagliate di CPU, RAM, disco, rete:

• Prometheus: raccoglie e archivia metriche (time-series DB)
• Grafana: visualizza le metriche in dashboard interattive
• Node Exporter: espone metriche del sistema Linux
• cAdvisor: metriche dei container Docker

docker-compose.yml completo

version: '3.8'
services:
  prometheus:
    image: prom/prometheus:latest
    restart: unless-stopped
    ports:
      - "9090:9090"
    volumes:
      - ./prometheus/prometheus.yml:/etc/prometheus/prometheus.yml
      - prometheus_data:/prometheus

  grafana:
    image: grafana/grafana:latest
    restart: unless-stopped
    ports:
      - "3000:3000"
    volumes:
      - grafana_data:/var/lib/grafana
    environment:
      - GF_SECURITY_ADMIN_PASSWORD=password_sicura

  node-exporter:
    image: prom/node-exporter:latest
    restart: unless-stopped
    ports:
      - "9100:9100"
    volumes:
      - /proc:/host/proc:ro
      - /sys:/host/sys:ro
    command:
      - '--path.procfs=/host/proc'
      - '--path.sysfs=/host/sys'

  cadvisor:
    image: gcr.io/cadvisor/cadvisor:latest
    restart: unless-stopped
    ports:
      - "8080:8080"
    volumes:
      - /:/rootfs:ro
      - /var/run:/var/run:ro
      - /sys:/sys:ro
      - /var/lib/docker:/var/lib/docker:ro

volumes:
  prometheus_data:
  grafana_data:

prometheus.yml

global:
  scrape_interval: 15s

scrape_configs:
  - job_name: 'node'
    static_configs:
      - targets: ['node-exporter:9100']
  - job_name: 'cadvisor'
    static_configs:
      - targets: ['cadvisor:8080']

Dashboard Grafana

Accedi a http://IP:3000. In Grafana → Dashboards → Import → inserisci ID:

• 1860: Node Exporter Full — metriche host complete
• 893: Docker and system monitoring — metriche container