Alerts


/etc/prometheus/alerts/up.yml > Up Checker
Host Down (1 active) 
alert: Host
  Down
expr: up == 0
for: 5m
labels:
  severity: critical
annotations:
  description: Host {{ $labels.job }} has been unavailable for more than 5 minutes.
  summary: Host {{ $labels.instance }} is down
Labels State Active Since Value
alertname="Host Down" instance="100.101.58.86:9182" job="CST-B0133-Abbey" severity="critical" firing 2026-09-11 16:13:10.926223677 +0000 UTC 0