Commit 7c5b29ef authored by Joshua Lambert's avatar Joshua Lambert Committed by Marcia Ramos

Add documentation for SLI alerts

parent 46e53a17
......@@ -108,13 +108,31 @@ A few fields are required:
#### Query Variables
GitLab supports a limited set of [CI variables] in the Prometheus query. This is particularly useful for identifying a specific environment, for example with `CI_ENVIRONMENT_SLUG`. The supported variables are:
GitLab supports a limited set of [CI variables](../../../ci/variables/README.html) in the Prometheus query. This is particularly useful for identifying a specific environment, for example with `CI_ENVIRONMENT_SLUG`. The supported variables are:
* CI_ENVIRONMENT_SLUG
* KUBE_NAMESPACE
To specify a variable in a query, enclose it in curly braces with a leading percent. For example: `%{ci_environment_slug}`.
### Setting up alerts for Prometheus metrics **[ULTIMATE]**
> [Introduced](https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/6590) in [GitLab Ultimate](https://about.gitlab.com/pricing/) 11.2 for [custom metrics](#adding-additional-metrics).
Alerts can be configured for [custom metrics](#adding-additional-metrics) directly in the performance dashboard.
Metrics from the [Metric Library](prometheus_library/metrics.md)
will be supported in an [upcoming release](https://gitlab.com/gitlab-org/gitlab-ee/issues/6948).
To set an alert, click on the alarm icon in the top right corner of the metric you want to create the alert for. A dropdown
will appear, with options to set the threshold and operator. Click **Add** to save and activate the alert.
![Adding an alert](img/prometheus_alert.png)
If the metric exceeds the threshold of the alert for over 5 minutes, an email
will be sent to all [Maintainers and Owners](../../permissions.md#project-members-permissions) of the project.
To remove the alert, click back on the alert icon for the desired metric, and click **Delete**.
## Determining the performance impact of a merge
> [Introduced][ce-10408] in GitLab 9.2.
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