Cortex not connected to Alertmanager critical
Cortex not connected to Alertmanager (instance {{ $labels.instance }})
>>>
< 1
The query cortex_prometheus_notifications_alertmanagers_discovered < 1 checks how many Alertmanager instances Cortex can discover; if the value is less than 1 (i.e., zero), it means Cortex is not connected to any Alertmanager and the alert fires.
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