VictoriaMetrics/app/vmalert/notifier/alertmanager_request.qtpl
Hui Wang ae4d376e41
vmalert: do not send message to alertmanager when alert has no label … (#6823)
…pair

`alert_relabel_configs` in [notifier
config](https://docs.victoriametrics.com/vmalert/#notifier-configuration-file)
can drop alert labels when used to filter different tenant alert message
to different notifier.
alertmanager would report error like `msg="Failed to validate alerts"
err="at least one label pair required"` in this case, but the rest of
the alerts inside one request would still be valid in alertmanager, so
it's not severe.
2024-09-09 13:34:48 +02:00

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{% import (
"time"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/promrelabel"
) %}
{% stripspace %}
{% func amRequest(alerts []Alert, generatorURL func(Alert) string, relabelCfg *promrelabel.ParsedConfigs) %}
[
{% for i, alert := range alerts %}
{% code lbls := alert.applyRelabelingIfNeeded(relabelCfg) %}
{% if len(lbls) == 0 %} {% continue %} {% endif %}
{
"startsAt":{%q= alert.Start.Format(time.RFC3339Nano) %},
"generatorURL": {%q= generatorURL(alert) %},
{% if !alert.End.IsZero() %}
"endsAt":{%q= alert.End.Format(time.RFC3339Nano) %},
{% endif %}
"labels": {
{% code ll := len(lbls) %}
{% for idx, l := range lbls %}
{%q= l.Name %}:{%q= l.Value %}{% if idx != ll-1 %}, {% endif %}
{% endfor %}
},
"annotations": {
{% code c := len(alert.Annotations) %}
{% for k,v := range alert.Annotations %}
{% code c = c-1 %}
{%q= k %}:{%q= v %}{% if c > 0 %},{% endif %}
{% endfor %}
}
}
{% if i != len(alerts)-1 %},{% endif %}
{% endfor %}
]
{% endfunc %}
{% endstripspace %}