<ul data-eligibleForWebStory="true"><li>Prometheus allows for the creation of alerts that don't trigger immediately to prevent false alarms from temporary issues.</li><li>The for clause in Prometheus alerting rules enables alerts to fire only if a condition persists for a specific duration.</li><li>An example alert rule using the for clause is provided with a demonstration involving the node_exporter service.</li><li>The example rule sets a 2-minute wait time before firing the 'NodeExporterDown' alert if the node_exporter service remains down.</li><li>Prometheus needs to continuously detect the specified condition for the set duration before sending a notification.</li><li>The process for configuring and implementing alert rules in Prometheus, as well as monitoring their states, is detailed in the example.</li><li>Users can observe alerts transitioning from inactive to pending, and eventually to firing states based on the specified conditions and time.</li></ul>

Stop False Alerts: How the for Clause Works in Prometheus

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