Outage in Grafana
Loki data source-managed alert rules not visible in the Grafana Cloud Alerting UI
Resolved MajorIncident Report
Summary AI Generated
Loki data source-managed alert rules became invisible in the Grafana Cloud Alerting UI across all regions globally, lasting approximately 18 hours. Alert evaluation and notification delivery were unaffected throughout the incident, with impact limited solely to UI visibility and management. A fix was developed and rolled out — requiring mid-deployment adjustments that extended the timeline — and the incident was fully resolved on June 18, 2026.
We have identified an issue where alert rules and alerts managed directly in a Loki data source (data source-managed alerting) are not displayed in the Grafana Cloud Alerting UI. Rules created via Prometheus/Mimir data sources and Grafana-managed alert rules are not affected.
Impact is limited to visibility and management in the UI. Affected alert rules continue to evaluate and send notifications normally — there is no impact to alert delivery.
Workaround: Loki alert rules can still be viewed and managed directly through the Loki ruler API (for example, using cortextool against /loki/api/v1/rules).
A fix has been identified and is in progress. We will provide a further update once it has been rolled out.
Components affected
Grafana US-CENTRAL: Alertmanager and Rules Configuration API Grafana EU-WEST: Alertmanager and Rules Configuration API Grafana AWS Australia - prod-au-southeast-1: Alertmanager and Rules Configuration API Grafana AWS Brazil - prod-sa-east-1: Alertmanager and Rules Configuration API Grafana AWS Canada - prod-ca-east-0: Alertmanager and Rules Configuration API Grafana AWS Germany - prod-eu-west-2: Alertmanager and Rules Configuration API Grafana AWS India - prod-ap-south-1: Alertmanager and Rules Configuration API Grafana AWS Singapore - prod-ap-southeast-1: Alertmanager and Rules Configuration API Grafana AWS Sweden - prod-eu-north-0: Alertmanager and Rules Configuration API Grafana AWS US East - prod-us-east-0: Alertmanager and Rules Configuration API Grafana AWS US West - prod-us-west-0: Alertmanager and Rules Configuration API Grafana Azure Netherlands - prod-eu-west-3: Alertmanager and Rules Configuration API Grafana Azure US Central - us-central2: Alertmanager and Rules Configuration API Grafana GCP Australia - prod-au-southeast-0: Alertmanager and Rules Configuration API Grafana GCP Belgium - prod-eu-west-0: Alertmanager and Rules Configuration API Grafana GCP Brazil - prod-sa-east-0: Alertmanager and Rules Configuration API Grafana GCP India - prod-ap-south-0: Alertmanager and Rules Configuration API Grafana GCP Singapore - prod-ap-southeast-0: Alertmanager and Rules Configuration API Grafana GCP UK - prod-gb-south-0: Alertmanager and Rules Configuration API Grafana GCP US Central - prod-us-central-0: Alertmanager and Rules Configuration APITrusted by 1,000+ teams
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Latest Updates ( sorted recent to last )
RESOLVED
about 6 hours ago - at 06/18/2026 02:08PM
This incident has been resolved.
MONITORING
about 12 hours ago - at 06/18/2026 08:04AM
A fix has been implemented and we are monitoring the results.
IDENTIFIED
about 21 hours ago - at 06/17/2026 11:22PM
We are continuing to deploy the fix and monitor recovery efforts. As part of the rollout, we identified an issue that required adjustments to our deployment plan, which has extended the timeline for mitigation. Work remains actively underway, and we will share additional updates as progress continues.
IDENTIFIED
about 23 hours ago - at 06/17/2026 09:43PM
Deployment of the fix is still in progress. We are continuing to monitor the rollout and validate recovery across affected systems. We will share further updates as they become available.
IDENTIFIED
about 23 hours ago - at 06/17/2026 08:55PM
Our Engineering Team has implemented a fix which is now being rolled out. We will continue to monitor the situation and update as soon as we have more information.
IDENTIFIED
1 day ago - at 06/17/2026 08:17PM
We have identified an issue where alert rules and alerts managed directly in a Loki data source (data source-managed alerting) are not displayed in the Grafana Cloud Alerting UI. Rules created via Prometheus/Mimir data sources and Grafana-managed alert rules are not affected.
Impact is limited to visibility and management in the UI. Affected alert rules continue to evaluate and send notifications normally — there is no impact to alert delivery.
Workaround: Loki alert rules can still be viewed and managed directly through the Loki ruler API (for example, using cortextool against /loki/api/v1/rules).
A fix has been identified and is in progress. We will provide a further update once it has been rolled out.
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