Alert rule with regular expression

Grafana Alerting
1

Hi all,
I got an alert rule with some logic and expression.
At the end, I evaluate an expression (see below)

image

I would like to know if it’s possible use a regexp for the text value of a label?
Or alternatively, how can I extend my expression like (SQL style):
($var > 15360) || ($var2 > 30) AND ({{ $values.A.Labels.server}} IN ‘server1c’,‘serverKK’,‘server14’)

I think, maybe is it only possible to filter label form metric, at the beginning of alert?

Thanks Alen

2

@alencappelletti what version of grafana are you using, alerting has a couple of flavors depending on your version.

If you’re using 8.x with unified alerting, the preview alert button in your alert configuration page will show a preview of the returned values of your alert query/expression and the labels/values that can be used in your alert notification.

3

Hi, thanks for your answer… I’m on last version 9.2.6.
Thanks for your tip… yes it’s clear to me the preview of returned values of alert… but
for the example I wrote on my post… the “IN” similar to SQL is possible in the ending of panel?

Exist AND or &&?

Thanks Alen

($var > 15360) || ($var2 > 30) AND ({{ $values.A.Labels.server}} IN ‘server1c’,‘serverKK’,‘server14’)

4

The values map is the output of the alert evaluation, are you asking if you can access them in your expression?

5

Hi, no…
I know how to access to the variables…
my question is only related to the syntax…
exists something like the IN function? In the validation of expression?

Alen

6

Seems not exists an IN like in t-sql…
I merged several alert expressions to raise the real alarm only in the last one, in a boolean mode.

ALEN