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grafana-mixin: Fix expression for GrafanaRequestsFailing alert (#63382)

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Fix expression for GrafanaRequestsFailing alert

The intent of the alert is to get the ratio of 5xx to all status codes
[^1]. With the original expression, the left hand side can have more than
one row with the same labels except for the status code. This results in
a promql error because it is doing a many-to-one matching. Doing a sum
on the left hand side first should preserve the intent of the alert and
resolve the issue.

[^1]: https://github.com/grafana/grafana/pull/43116
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lpugoy 2023-05-04 22:35:36 +10:00 committed by GitHub
parent 3c42dea10b
commit c792af3ad0
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1 changed files with 2 additions and 2 deletions
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4
grafana-mixin/alerts/alerts.libsonnet
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@ -11,8 +11,8 @@
{
alert: 'GrafanaRequestsFailing',
expr: |||
100 * namespace_job_handler_statuscode:grafana_http_request_duration_seconds_count:rate5m{handler!~"/api/datasources/proxy/:id.*|/api/ds/query|/api/tsdb/query", status_code=~"5.."}
/ ignoring (status_code) group_left
100 * sum without (status_code) (namespace_job_handler_statuscode:grafana_http_request_duration_seconds_count:rate5m{handler!~"/api/datasources/proxy/:id.*|/api/ds/query|/api/tsdb/query", status_code=~"5.."})
/
sum without (status_code) (namespace_job_handler_statuscode:grafana_http_request_duration_seconds_count:rate5m{handler!~"/api/datasources/proxy/:id.*|/api/ds/query|/api/tsdb/query"})
> %(grafanaRequestsFailingThresholdPercent)s
||| % $._config,