groups:
- name: alert.rules
  rules:
  - alert: InstanceDown
    expr: up{job="node-exporter"} == 0
    for: 5m
    labels:
      severity: critical
    annotations:
      summary: "Endpoint {{ $labels.instance }} down"
      description: "{{ $labels.instance }} of job {{ $labels.job }} has been down for more than 1 minutes."
  - alert: InstanceUptime
    expr: time() - node_boot_time_seconds{job="node-exporter"} >= 7776000
    labels:
      severity: warning
    annotations:
      summary: "Uptime of {{ $labels.instance }} more than 90 days"
      description: "The last reboot of {{ $labels.instance }} was more than 90 days ago"