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vmalert: use missingkey=zero for templating (#4040)

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Replace empty labels with "" instead of "<no value>"
during templating, as Prometheus does.

See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4012

Signed-off-by: hagen1778 <roman@victoriametrics.com>
This commit is contained in:
Roman Khavronenko 2023-03-30 14:57:00 +02:00 committed by Aliaksandr Valialkin
parent 46c8be4f98
commit 0bde9722ed
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2
app/vmalert/notifier/alert.go
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@ -170,6 +170,8 @@ func templateAnnotation(dst io.Writer, text string, data tplData, tmpl *textTpl.
if err != nil {
return fmt.Errorf("error cloning template before parse annotation: %w", err)
}
// Clone() doesn't copy tpl Options, so we set them manually
tpl = tpl.Option("missingkey=zero")
tpl, err = tpl.Parse(text)
if err != nil {
return fmt.Errorf("error parsing annotation template: %w", err)

1
docs/CHANGELOG.md
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@ -44,6 +44,7 @@ created by v1.90.0 or newer versions. The solution is to upgrade to v1.90.0 or n
* BUGFIX: [MetricsQL](https://docs.victoriametrics.com/MetricsQL.html): properly convert [VictoriaMetrics historgram buckets](https://valyala.medium.com/improving-histogram-usability-for-prometheus-and-grafana-bc7e5df0e350) to Prometheus histogram buckets when VictoriaMetrics histogram contain zero buckets. Previously these buckets were ignored, and this could lead to missing Prometheus histogram buckets after the conversion. Thanks to @zklapow for [the fix](https://github.com/VictoriaMetrics/VictoriaMetrics/pull/4021).
* BUGFIX: properly support comma-separated filters inside [retention filters](https://docs.victoriametrics.com/#retention-filters). See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3915).
* BUGFIX: verify response code when fetching configuration files via HTTP. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4034).
* BUGFIX: [vmalert](https://docs.victoriametrics.com/vmalert.html): replace empty labels with "" instead of "<no value>" during templating, as Prometheus does. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4012).
## [v1.89.1](https://github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.89.1)