// Aula 28 - Regras de alerta

groups:
 - name: node_alerta
   rules:
    - record: job:up:avg
      expr: avg without(instance)(up{job="node"})
    - alert: MuitosHostsInativos
      expr: job:up:avg{job="node"} < 0.5

"expr: up{job="node"}"

groups:
 - name: node_alerta
   rules:
    - record: job:up:avg
      expr: avg without(instance)(up{job="node"})
    - alert: MuitosHostsInativos
      expr: (avg without(instance)(up{job="node"}) < 0.5 and on() hour() >= 8 < 18)

Veja em http://192.168.15.141:9090/status