原文地址: https://www.elastic.co/guide/en/elasticsearch/reference/7.7/trigger.html, 原文档版权归 www.elastic.co 所有

Triggersedit

Every watch must have a trigger that defines when the watch execution process should start. When you create a watch, its trigger is registered with the appropriate Trigger Engine. The trigger engine is responsible for evaluating the trigger and triggering the watch when needed.

Watcher is designed to support different types of triggers, but only time-based schedule triggers are currently available.