Chapter 8. Event discovery
8.1. Listing event sources and event source types
It is possible to view a list of all event sources or event source types that exist or are available for use on your OpenShift Container Platform cluster. You can use the Knative (kn) CLI or the Developer perspective in the OpenShift Container Platform web console to list available event sources or event source types.
8.2. Listing event source types from the command line
Using the Knative (kn) CLI provides a streamlined and intuitive user interface to view available event source types on your cluster.
8.2.1. Listing available event source types by using the Knative CLI
You can list event source types that can be created and used on your cluster by using the kn source list-types CLI command.
Prerequisites
- The OpenShift Serverless Operator and Knative Eventing are installed on the cluster.
-
You have installed the Knative (
kn) CLI.
Procedure
List the available event source types in the terminal:
$ kn source list-types
Example output
TYPE NAME DESCRIPTION ApiServerSource apiserversources.sources.knative.dev Watch and send Kubernetes API events to a sink PingSource pingsources.sources.knative.dev Periodically send ping events to a sink SinkBinding sinkbindings.sources.knative.dev Binding for connecting a PodSpecable to a sink
Optional: On OpenShift Container Platform, you can also list the available event source types in YAML format:
$ kn source list-types -o yaml
8.3. Listing event source types from the Developer perspective
It is possible to view a list of all available event source types on your cluster. Using the OpenShift Container Platform web console provides a streamlined and intuitive user interface to view available event source types.
8.3.1. Viewing available event source types within the Developer perspective
Prerequisites
- You have logged in to the OpenShift Container Platform web console.
- The OpenShift Serverless Operator and Knative Eventing are installed on your OpenShift Container Platform cluster.
- You have created a project or have access to a project with the appropriate roles and permissions to create applications and other workloads in OpenShift Container Platform.
Procedure
- Access the Developer perspective.
- Click +Add.
- Click Event Source.
- View the available event source types.
8.4. Listing event sources from the command line
Using the Knative (kn) CLI provides a streamlined and intuitive user interface to view existing event sources on your cluster.
8.4.1. Listing available event sources by using the Knative CLI
You can list existing event sources by using the kn source list command.
Prerequisites
- The OpenShift Serverless Operator and Knative Eventing are installed on the cluster.
-
You have installed the Knative (
kn) CLI.
Procedure
List the existing event sources in the terminal:
$ kn source list
Example output
NAME TYPE RESOURCE SINK READY a1 ApiServerSource apiserversources.sources.knative.dev ksvc:eshow2 True b1 SinkBinding sinkbindings.sources.knative.dev ksvc:eshow3 False p1 PingSource pingsources.sources.knative.dev ksvc:eshow1 True
Optional: You can list event sources of a specific type only, by using the
--typeflag:$ kn source list --type <event_source_type>
Example command
$ kn source list --type PingSource
Example output
NAME TYPE RESOURCE SINK READY p1 PingSource pingsources.sources.knative.dev ksvc:eshow1 True
