Cortex ruler configuration reload failure warning
Cortex ruler configuration reload failure (instance {{ $labels.instance }})
>>>
!= 1
The query checks the metric cortex_ruler_config_last_reload_successful and fires when its value is not equal to 1, meaning the latest Cortex ruler configuration reload on that instance did not succeed (or the metric is absent). The alert therefore triggers whenever a reload fails, indicating a configuration reload problem for the instance identified by $labels.instance.
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