Use a dynamic interval for UPS output voltage alerts

2021-04-02 13:57:34 +02:00 · 2021-04-02 13:57:34 +02:00 · 06f101527d
commit 06f101527d
parent 83f5b35e59
1 changed files with 3 additions and 1 deletions
--- a/roles/prometheus/templates/alert.rules.yml.j2
+++ b/roles/prometheus/templates/alert.rules.yml.j2
@ -132,7 +132,9 @@ groups:
            Tension d'entrée de {{ raw('$value') }}V

      - alert: UpsWrongOutputVoltage
-        expr: (upsOutputVoltage < 220) or (upsOutputVoltage > 240)
+        expr: >-
+          abs(upsInputVoltage - avg_over_time(upsOutputVoltage[1d]))
+            < 3 * stddev_over_time(upsOutputVoltage[1d])
        for: 10m
        labels:
          severity: warning