anchor.diff:          labels:
             alertgroup: "{{ $labels.instance }}"
           annotations:
  -          major_page_faults: "{{ $value | humanizePercentage }}"
  +          pressure: "{{ $value | humanizePercentage }}"
         - alert: oom kill detected
           expr: increase(node_vmstat_oom_kill[1m]) > 0
           for: 0m
  
positive.code:         labels:
            alertgroup: "{{ $labels.instance }}"
          annotations:
            major_page_faults: "{{ $value | humanizePercentage }}"
    - name: ipmi
      rules:
        - alert: ipmi fan alarm
  
negative.code:         labels:
            alertgroup: "{{ $labels.instance }}"
          annotations:
            pressure: "{{ $value | humanizePercentage }}"
    - name: database
      rules:
        - alert: postgres replication delay
  