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Alerting: Respect "For" Duration for NoData alerts (#65574)

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* Alerting: Respect "For" Duration for NoData alerts

This change modifies `resultNoData` to be more inline with the logic of the other state handlers.

The main effects of this are:

1) NoData states with NoDataState config set to Alerting will respect "For" duration.
2) Prevents zero value in StartsAt and EndsAt for alerts that have only even been in normal state. This includes state transitions from NoDataState=OK and ExecErrState=OK.
3) Better state transition logging.
This commit is contained in:
Matthew Jacobson
2023-03-31 19:05:15 +03:00
committed by GitHub
parent ed8628e39d
commit b9dc04139a
4 changed files with 152 additions and 104 deletions
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docs/sources/alerting/alerting-rules/create-grafana-managed-rule.md
+6 -6
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@@ -84,11 +84,11 @@ Configure alerting behavior in the absence of data using information in the foll
| No Data Option | Description |
| -------------- | ----------------------------------------------------------------------------------------------------------------------------------------- |
| No Data | Create a new alert `DatasourceNoData` with the name and UID of the alert rule, and UID of the datasource that returned no data as labels. |
| Alerting | Set alert rule state to `Alerting`. |
| Alerting | Set alert rule state to `Alerting`. This option will respect the configured **Evaluate for** pending period. |
| Ok | Set alert rule state to `Normal`. |
| Error or timeout option | Description |
| ----------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------- |
| Alerting | Set alert rule state to `Alerting`. From Grafana 8.5, the alert rule waits for the entire duration for which the condition is true before firing. |
| OK | Set alert rule state to `Normal` |
| re | Error | Create a new alert `DatasourceError` with the name and UID of the alert rule, and UID of the datasource that returned no data as labels. |
| Error or timeout option | Description |
| ----------------------- | ---------------------------------------------------------------------------------------------------------------------------------------- |
| Error | Create a new alert `DatasourceError` with the name and UID of the alert rule, and UID of the datasource that returned no data as labels. |
| Alerting | Set alert rule state to `Alerting`. This option will respect the configured **Evaluate for** pending period. |
| OK | Set alert rule state to `Normal` |