#1 Trigger event genereren
Verandering van trigger status is de meest voorkomende en belangrijkste bron van evenementen. Elke keer dat de trigger van status verandert, wordt een gebeurtenis gegenereerd. De gebeurtenis bevat details van de verandering van de trigger status - wanneer het gebeurde en wat de nieuwe staat is.
Er worden twee soorten gebeurtenissen gecreëerd door triggers: Probleem en OK.
Er wordt een probleem event aangemaakt:
Een OK-event sluit de gerelateerde probleem event(s) en kan worden gemaakt door 3 componenten:
Triggers have an 'OK event generation' setting that controls how OK events are generated:
Additionally triggers have an 'OK event closes' setting that controls which problem events are closed:
Event correlation (also called global event correlation) is a way to set up custom event closing (resulting in OK event generation) rules.
The rules define how the new problem events are paired with existing problem events and allow to close the new event or the matched events by generating corresponding OK events.
However, event correlation must be configured very carefully, as it can negatively affect event processing performance or, if misconfigured, close more events than intended (in the worst case even all problem events could be closed). A few configuration tips:
If the 'Allow manual close' setting is enabled for trigger, then it's possible to manually close problem events generated by the trigger. This is done in the frontend when updating a problem. The event is not closed directly – instead a 'close event' task is created, which is handled by the task manager shortly. The task manager will generate a corresponding OK event and the problem event will be closed.