Alertmanager exporter should allow additional labels #38063
Description
Component(s)
No response
Is your feature request related to a problem? Please describe.
Alertmanager routing can select different routes based on labels on incoming alerts. But the altermanager exporter creates only two labels: severity and event_name.
My desired use case is to route alerts based on the service name, and severity, with overrides for some library events. I expect the mapping of teams handling alerts is fairly unique by company, so more flexibility is helpful here.
Describe the solution you'd like
Accept in configuration a list of event annotations to promote to labels.
When an annotation is present, add its value to the LabelSet of the created alert, here:
https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/exporter/alertmanagerexporter/alertmanager_exporter.go#L116
Describe alternatives you've considered
To get similar behavior of passing routing information into alertmanager:
- concatenate multiple labels into event_name and use regex matchers in alertmanager to separate them again.
- fork this exporter, and add label support.
Additional context
No response