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docs: add keep_firing_for in alerting rules

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Signed-off-by: alexgreenbank <alex.greenbank@grafana.com>
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alexgreenbank 2024-10-22 14:19:01 +01:00
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commit 3afcda82be
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8
docs/configuration/alerting_rules.md
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@ -27,6 +27,7 @@ groups:
- alert: HighRequestLatency - alert: HighRequestLatency
expr: job:request_latency_seconds:mean5m{job="myjob"} > 0.5 expr: job:request_latency_seconds:mean5m{job="myjob"} > 0.5
for: 10m for: 10m
keep_firing_for: 5m
labels: labels:
severity: page severity: page
annotations: annotations:
@ -40,6 +41,13 @@ the alert continues to be active during each evaluation for 10 minutes before
firing the alert. Elements that are active, but not firing yet, are in the pending state. firing the alert. Elements that are active, but not firing yet, are in the pending state.
Alerting rules without the `for` clause will become active on the first evaluation. Alerting rules without the `for` clause will become active on the first evaluation.
There is also an optional `keep_firing_for` clause that tells Prometheus to keep
this alert firing for the specified duration after the firing condition was last met.
This can be used to prevent situations such as flapping alerts, false resolutions
due to lack of data loss, etc. Alerting rules without the `keep_firing_for` clause
will deactivate on the first evaluation where the condition is not met (assuming
any optional `for` duration desribed above has been satisfied).
The `labels` clause allows specifying a set of additional labels to be attached The `labels` clause allows specifying a set of additional labels to be attached
to the alert. Any existing conflicting labels will be overwritten. The label to the alert. Any existing conflicting labels will be overwritten. The label
values can be templated. values can be templated.