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openshift-docs/modules/kn-trigger-filtering.adoc
2022-08-04 14:38:35 +00:00

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// Module included in the following assemblies:
//
// * /serverless/develop/serverless-triggers.adoc
:_content-type: REFERENCE
[id="kn-trigger-filtering_{context}"]
= Filtering events with triggers by using the Knative CLI
// should be a procedure module but out of scope for this PR
Using the Knative (`kn`) CLI to filter events by using triggers provides a streamlined and intuitive user interface. You can use the `kn trigger create` command, along with the appropriate flags, to filter events by using triggers.
In the following trigger example, only events with the attribute `type: dev.knative.samples.helloworld` are sent to the event sink:
[source,terminal]
----
$ kn trigger create <trigger_name> --broker <broker_name> --filter type=dev.knative.samples.helloworld --sink ksvc:<service_name>
----
You can also filter events by using multiple attributes. The following example shows how to filter events using the type, source, and extension attributes:
[source,terminal]
----
$ kn trigger create <trigger_name> --broker <broker_name> --sink ksvc:<service_name> \
--filter type=dev.knative.samples.helloworld \
--filter source=dev.knative.samples/helloworldsource \
--filter myextension=my-extension-value
----