groups:
  - name: group
    rules:
      - alert: InvalidExpr
        for: 5m
        expr: vm_rows{ > 0
        labels:
          label: bar
        annotations:
          summary: "{{ $value }}"
          description: "{{$labels}}"
      - alert: EmptyExpr
        for: 5m
        expr: ""
        labels:
          label: bar
        annotations:
          summary: "{{ $value }}"
          description: "{{$labels}}"
      - alert: ""
        for: 5m
        expr: vm_rows > 0
        labels:
          label: foo
        annotations:
          summary: "{{ $value }}"
          description: "{{$labels}}"