Thank you very much Brian.
On Monday, December 13, 2021 at 7:04:33 PM UTC+8 Brian Candler wrote:
> I think there's not much point continuing this discussion. Prometheus
> does not have exactly what you keep asking for, which is "to check"
> something externally before sending an alert to alertmanager. All it can
> check is what's in its timeseries database at that time.
>
> However, you can achieve what you want by applying a silence to
> alertmanager. Note that you can do this *before* an alert fires: a silence
> is just a matching rule, saying "ignore alerts which match these labels".
> Push out a silence matching {instance="X"} as soon as you know you're not
> interested in alerts from device X, and you won't receive notifications for
> that device.
>
> If that doesn't meet your needs, then I'm sorry, but perhaps you should
> look for different software which does, or write something yourself. You
> could for example write a webhook receiver for alerts, which performs any
> check you like before forwarding the alert to its final destination.
>
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