Publish event handler
This page documents an earlier version of Kapacitor. Kapacitor v1.6 is the latest stable version. View this page in the v1.6 documentation.
The publish event handler publishes events to another topic.
The following publish event handler options can be set in a handler file.
|topics||list of string||List of topic names to publish events.|
Example: handler file
id: handler-id topic: topic-name kind: publish options: topics: - system - ops_team
Using the publish event handler
The following setup sends an alert to the
cpu topic with the message,
“Hey, check your CPU”.
A publish handler is added that subscribes to the
cpu topic and publishes new
alerts to other topics.
Create a TICKscript that publishes alert messages to a topic.
The TICKscript below sends an alert message to the
cpu topic any time idle CPU
usage drops below 10%.
stream |from() .measurement('cpu') |alert() .crit(lambda: "usage_idle" < 10) .message('Hey, check your CPU') .topic('cpu')
Add and enable the TICKscript:
kapacitor define cpu_alert -tick cpu_alert.tick kapacitor enable cpu_alert
Create a handler file that subscribes to the
cpu topic and uses the publish
event handler to publish alerts to other topics.
id: publish-cpu-alert topic: cpu kind: publish options: topics: - system - ops_team
Add the handler:
kapacitor define-topic-handler publish_cpu_alerts_handler.yaml
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