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Last reviewed: August 19, 2026Configure alert rules
Alert rules are stored and evaluated by the ruler of your Prometheus, Mimir, Cortex, or Loki data source. The plugin gives you an editor for them, so you can manage rules without editing YAML by hand or redeploying.
Before you begin
Editing rules needs two things:
- The
alert.rules.external:writepermission. Refer to Configure access control. - A data source with a writable ruler API. Mimir, Cortex, and Loki have one; vanilla Prometheus doesn’t, and its rules are read-only here. Refer to Configure data sources.
If either is missing you can still browse rules. The create and edit actions are absent.
In this section
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