"Conditional" alert groups in Alertmanager

[Gautam Gupta]

Hi,

Is there a way to default to the behavior of `group_by: ["..."]` (i.e. no grouping) while configuring an optional label to act as a "grouping" key?

Maybe a better way to phrase is is that I'd like `group_by: ["alertname", "group"]` to group alerts by the `group` label when it is present, but to treat alerts as distinct if the label is not present.

I think right now my only workaround is to duplicate my receivers to have separate `group_by` configs, and then route to them depending on the presence of the `group` label.

The use case is that for most of my alerts, I'd like to be notified for each distinct occurrence, but a few of them are likely to fire across the entire fleet at once and I'd like those to be grouped together. Not sure if there's another way to accomplish this. 

[Julius Volz]

Hi Gautam, I believe you're correct. Since the grouping is determined on a (sub)route level, having a top-level switch on the "group" label and then duplicating things below that seems to be the best way to achieve this.

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Julius Volz

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