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dist/rules/prometheus-self-monitoring/embedded-exporter.yml

@@ -14,6 +14,8 @@ groups:
         summary: Prometheus job missing (instance {{ $labels.instance }})
         description: "A Prometheus job has disappeared\n  VALUE = {{ $value }}\n  LABELS = {{ $labels }}"
 
+    # Only fire if at least one target in the job is still up.
+    # If all targets are down, PrometheusJobMissing or PrometheusAllTargetsMissing will fire instead.
     - alert: PrometheusTargetMissing
       expr: 'up == 0 unless on(job) (sum by (job) (up) == 0)'
       for: 0m