Initially, Metadata had only the EditorSettings, and HasMetadata was used to understand if the incoming update request had metadata in the body because it could be omitted if it was empty. For example, when the rule is updated via the provisioning API or has only false values. If it was in the request, we used that; if not, we used the metadata from the existing rule from the database. If the rule was updated via the AlertRuleService, we didn't change Metadata at all if the rule already existed.
But now, Metadata also has the Prometheus rule definition, and we always need to update it with the new version of the AlertRuleService when the rule exists in the DB and has the same UID. HasMetadata is renamed to HasEditorSettings to keep the old behaviour only for EditorSettings.
Now, the provisioning API and the conversion API will overwrite everything except EditorSettings with the new data.
What is this feature?
Adds an API endpoint to create alert rules with mimirtool:
- POST /convert/prometheus/config/v1/rules/{NamespaceTitle} - Accepts a single rule group in a Prometheus YAML format and creates or updates a Grafana rule group from it.
The endpoint uses the conversion package from #100224.
Key parts
The API works similarly to the provisioning API. If the rule does not exist, it will be created, otherwise updated. Any rules not present in the new group will be deleted, ensuring the group is fully synchronized with the provided configuration.
Since the API works with namespace titles (folders), the handler automatically creates a folder in the root based on the provided title if it does not exist. It also requires a special header, X-Grafana-Alerting-Datasource-UID. This header specifies which datasource to use for the new rules.
If the rule group's evaluation interval is not specified, it uses the DefaultRuleEvaluationInterval from settings.
Alexander Akhmetov