Grafana - invalid format of evaluation results for the alert definition

Monitoring and Observability Grafana
#1

Hi to all again. Can somebody help with this new fancy ngalert? I can’t understand how write rules. (eh. it was simple somevalue > somevalue -> alert, now it do anything else but doesn’t alert)
Currently I get this error invalid format of evaluation results for the alert definition A: looks like time series data, only reduced data can be alerted on."
When I build this scheme:
• Query: sum(somevalue)
• Math: $A>1
• Reduce: Mean B
Its firing in GUI, but nothing in slack

#2

You have to use a reduce step in your alert.

#3

And your alert math rule must use the reduce output.
A -> query
B -> Reduce (uses imput from A)
C -> Math (uses input from B)
Condition on C

#4

For what math needed then?

#5

Just get some information for description?

#6

Did you get it working?

#7

Nope, still alerting in gui, nothing in slack

#8

Did you make contact points and notification policies?

#9

Yeap. Test notification works

#10

I delete all templates for the slack receiver. Maybe error somewhere there (though there is no errors in logs)

#11

Ok. at some point I get it worked with lag for several minutes. so my alert may firing for ~5 minutes and only after that grafana decided to notify me :face_palm:

#12

Thanks for help

#13

That is a setting in your Alert, but sometimes it can be delayed. No clue why.

#14

Already set 10s and 0, so it must fire at time when alert is triggered