version: "3.8"

services:
  prometheus:
    image: prom/prometheus
    volumes:
      - ./prometheus:/etc/prometheus
      - prom_data:/prometheus
    ports:
      - "9090:9090"
    restart: unless-stopped

  grafana:
    image: grafana/grafana
    ports:
      - "3000:3000"
    volumes:
      - graf_data:/var/lib/grafana
    restart: unless-stopped

  node-exporter:
    image: prom/node-exporter
    network_mode: host
    pid: host
    restart: unless-stopped

  cadvisor:
    image: gcr.io/cadvisor/cadvisor
    privileged: true
    ports:
      - "8080:8080"
    volumes:
      - /:/rootfs:ro
      - /var/run:/var/run:ro
      - /sys:/sys:ro
      - /var/lib/docker:/var/lib/docker:ro

volumes:
  prom_data:
  graf_data:

docker-compose up -d 

global:
  scrape_interval: 15s

scrape_configs:
  - job_name: prometheus
    static_configs:
      - targets: ["localhost:9090"]

  - job_name: node
    static_configs:
      - targets: ["MONITORING_HOST_IP:9100"]

  - job_name: cadvisor
    static_configs:
      - targets: ["localhost:8080"]

groups:
  - name: base
    rules:
      - alert: TargetDown
        expr: up == 0
        for: 2m
        labels:
          severity: critical

      - alert: DiskAlmostFull
        expr: node_filesystem_avail_bytes / node_filesystem_size_bytes < 0.1
        for: 10m
        labels:
          severity: warning