alert_rules:
  - name: High network traffic
    condition: host.network.traffic > 50
    message: "Host is receiving very high network traffic (>50 Mb/s)."

  - name: High CPU usage
    condition: host.cpu.usage > 85
    message: "CPU usage is above 85%."

  - name: Target down
    condition: target.up == 0
    message: "One of the targets is down."

  - name: All targets down
    condition: all(targets.up == 0)
    message: "All targets are down. Please investigate immediately."