What is this feature?
Prometheus conversion: ensures that AlertRule.Data queries always have default parameters set (intervalMs, maxDataPoints). Without this, updates of the same rule can cause version increments.
Why do we need this feature?
Currently, when converting Prometheus rules to Grafana alerts, some default parameters are not explicitly set in the query model. This creates a problem during rule updates:
When a user updates a rule that hasn't changed, we still detect differences in the AlertQuery.Model because the newly converted rules are missing the default fields, such as intervalMs and maxDataPoints. This causes unnecessary version increments of alert rules.
Backend:
* Update the Grafana Alerting engine to provide feedback to HysteresisCommand. The feedback information is stored in state.Manager as a fingerprint of each state. The fingerprint is persisted to the database. Only fingerprints that belong to Pending and Alerting states are considered as "loaded" and provided back to the command.
- add ResultFingerprint to state.State. It's different from other fingerprints we store in the state because it is calculated from the result labels.
- add rule_fingerprint column to alert_instance
- update alerting evaluator to accept AlertingResultsReader via context, and update scheduler to provide it.
- add AlertingResultsFromRuleState that implements the new interface in eval package
- update getExprRequest to patch the hysteresis command.
* Only one "Recovery Threshold" query is allowed to be used in the alert rule and it must be the Condition.
Frontend:
* Add hysteresis option to Threshold in UI. It's called "Recovery Threshold"
* Add test for getUnloadEvaluatorTypeFromCondition
* Hide hysteresis in panel expressions
* Refactor isInvalid and add test for it
* Remove unnecesary React.memo
* Add tests for updateEvaluatorConditions
---------
Co-authored-by: Sonia Aguilar <soniaaguilarpeiron@gmail.com>
* add NodeTypeFromDatasourceUID and DataSourceModelFromNodeType()
* deprecate expr.DataSourceModel
* replace usages of IsDataSource to NodeTypeFromDatasourceUID
* replace usages of DataSourceModel to DataSourceModelFromNodeType()
* Alerting: Tiny refactor on the eval and schedule packages
two very small things:
- We had a constructor on something called a `Context` which is not a `context.Context` so let's just name that constructor `NewContext`
- The user that we use to run query evaluations is the same (with some variation) abstract it to a function so that it can be re-used when necessary.
* Update pkg/services/ngalert/schedule/schedule.go
Co-authored-by: Alexander Weaver <weaver.alex.d@gmail.com>
* Update pkg/services/ngalert/schedule/schedule.go
Co-authored-by: Alexander Weaver <weaver.alex.d@gmail.com>
---------
Co-authored-by: Alexander Weaver <weaver.alex.d@gmail.com>
* Use suggested value for uid
* update the snapshot
* use __expr__
* replace all -100 with __expr__
* update snapshot
* more changes
* revert redundant change
* Use expr.DatasourceUID where it's possible
* generate files
* make TimeRange interface and add relative range
* make Execute methods support the current time
* update resample to support relative time range
* update DSNode to support relative time range
* update query service to create queries with absolute time
* make alerting evaluator create relative time ranges
* update swagger json files match datasourceUid change
underlying change made in https://github.com/grafana/grafana/pull/33282
* Document DatasourceUID field in AlertQuery model
* Run spec generation from inside a docker container
* Generate latest spec
Co-authored-by: Sofia Papagiannaki <sofia@grafana.com>
