feat: loki alert rules - #124
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Adds default loki alert rules to help when setting up loki for juju.
iyiguncevik
approved these changes
Jul 14, 2026
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| sum(rate({%%juju_topology%%} |= "ERROR" [5m])) by (juju_model, juju_model_uuid, juju_application) | ||
| / | ||
| sum(rate({%%juju_topology%%}[5m])) by (juju_model, juju_model_uuid, juju_application) | ||
| > 0.05 |
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This is generally correct. Probably there are always enough logs that we don't need to consider low-volume scenario like there are 3 logs for 5 minutes and 1 of the is error level.
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| The Juju controller has logged a FATAL error or panic in the last | ||
| 5 minutes. This indicates a critical failure that may require | ||
| immediate investigation. |
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Not in last 5 minutes to be exact. This will fire as soon as possible. You could also change the range from 5m to 1m, but that also doesn't matter so much.
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The Juju controller charm forwards its workload logs to Loki via the loki-push-api relation, and the LokiPushApiConsumer library defaults to forwarding alert rules from
./src/loki_alert_rules/.Adds
src/loki_alert_rules/juju_controller_alerts.yamlwith three LogQL alert rules, each scoped to the charm's Juju topology via the%%juju_topology%%placeholder (automatically resolved by the library):