Alertmanager stdout notifier (or tweak some debug logs)

[Ed Welch]

Hey folks! Looking for some feedback on a potential solution for a problem I would like to solve:

I would like to capture all the alerts being sent via alertmanager via the logger into my logging system so that I can do some analytics on alerts and frequency after the fact.

Currently, the debug level logging in the dispatch.go for alerts will log the alert as it's processed [1]

However the Stringer method for the Alert type only includes the alert name and the fingerprint of the labels [2]. I really need the printed labels for the log line to be useful for the purpose I'm seeking.

I have 2 thoughts:

- would the project be receptive to changing this Stringer method to also include the full label list?
- as an alternative would something like a stdout notifier be considered for inclusion in the alertmanager?

For the second case I'm thinking a very simple notifier which just prints the alert to stdout, perhaps with some basic options for controlling the format.

Thoughts?

Thanks,

Ed

[1] https://github.com/prometheus/alertmanager/blob/0c0c6bdb0133e399c1a9fe4c1a170ce49ec67b58/dispatch/dispatch.go#L138
[2] https://github.com/prometheus/alertmanager/blob/f10e5cb703616584f9772966589e2060db5daf34/vendor/github.com/prometheus/common/model/alert.go#L55

[Frederic Branczyk]

On debug log level, I don't see why we wouldn't add it to the stringer method. I feel this is useful debugging context, so I'd be happy to have this.

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