Undo clear alarm
To undo alarm clearing you need to perform the following actions:
-
Press the views panel.
button in the -
Select "Active alarms" in the dropdown at the top left corner of the window.
-
Press the right mouse button on the cleared alarm, that you intend to set it its previous state.
-
In the opened context menu, select the " Undo clear" item:

Undo alarm clearing
After you cancel clearing, the alarm will return to its previous state.
REST API
You can clear an alarm using the Undo Clear Incident request.
You need an alarm ID for this request.
login=<...>
password=<...>
incident_id=<...>
saymon_hostname=<...>
url=https://$saymon_hostname/node/api/incidents/$incident_id/undo-clear
curl -X POST $url -u $login:$password