How to trigger alert immediately without pending state

[equestriansean]

• What Grafana version and what operating system are you using?
  Grafana v8.0.3 running on docker with ngalert feature enable

• What are you trying to achieve?
  Fire alert immediately

• How are you trying to achieve it?

1. enable ngalert feature
2. add a new alert rule
3. configure evaluate for filed to 0s (the original alert feature allows to set 0s, but ngalert doesn’t)

• What happened?
  I can not set evaluate for to 0, the ui shows it can not be less than 10s

• What did you expect to happen?
  set to 0, so that we can trigger alert immediately without pending state

• Can you copy/paste the configuration(s) that you are having problems with?

• Did you receive any errors in the Grafana UI or in related logs? If so, please tell us exactly what they were.
  

  

[svishnyakov]

Also interested. It was possible with “old” version of alerts, but the ngalerts doesn’t support that feature, what is frustrating.