// Aula 30 - Regras de alerta parte 3
     
 - name: node_alerta
   rules:
    - record: job:up:avg
      expr: avg without(instance)(up{job="windows"})
    - alert: MuitosHostsInativos
      expr: job:up:avg{job="windows"} < 0.5
      for: 5m
      labels:
       severity: grave
      
 - name: teste
   rules:
   - alert: InstanceDown
     expr: up{job="node"} == 0
     for: 1h
     labels:
      severity: pouco importante
          
 - name: FDs
   rules:
   - alert: FDsNoLimite
     expr: process_open_fds > process_max_fds * .95
     for: 5m
     labels:
      severity: grave
      
   - alert: FDsNoLimite
     expr: process_open_fds > process_max_fds * .8
     for: 5m
     labels:
      severity: importante