groups:
- name: instances
  rules:
  - alert: InstanceDown
    expr: up == 0
    for: 1m
    labels:
      severity: page
    annotations:
      summary: "Instance {{ $labels.instance }} down"

  - alert: HighLoad
    expr: node_load1 > 1.5
    for: 5m
    labels:
      severity: warning
    annotations:
      summary: "High load on {{ $labels.instance }}"