> When i setup the alerm it fire.. I dont know why.
An alert fires whenever an expression has *any* value. It doesn't matter
what the value is, or even if the value is zero. If you don't want the
alert to fire, then don't return any timeseries.
Note that an expression like
foo > 10
is a filter, not a boolean. It filters all the 'foo' timeseries and
returns only those ones with value over 10. It returns an empty set of
timeseries if there is no metric with value over 10; if there are any
timeseries with foo > 10, then one or more timeseries will be returned (and
it is the presence of these timeseries which triggers the alert, not the
value of these timeseries).
In your case, I would simplify your expression to something like this:
count(probe_success{whatever} == 0) >= 3
This will return a single timeseries if the count is 3 or more, and no
timeseries if the value is less than 3.
On Thursday, 22 July 2021 at 23:16:37 UTC+1 [email protected] wrote:
> Hi,
>
> I want confiured an alert only when 3 instance are down on process
> success. So I do this promql query
>
> scalar(sum without(instance)
> (probe_success{instance=~"192.168.0.118|192.168.0.119|192.168.50.237"})) <
> bool 1
> the resul is 0 (false)
>
> The resul is False (o) because process_seccuss 192.168.50.237
> is 1
>
> When i setup the alerm it fire.. I dont know why.
> I try a test like that
> 1 < bool 1
>
> and it not fire
>
> Why who same result have different behaviur?
>
> thanks
>
>
>
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