Invoking functions | Functions | Red Hat OpenShift Serverless 1.34

Invoking a deployed function with a test event

You can test a deployed function by invoking it. You can do it using the kn func tool.

Invoking a deployed function with a test event

You can use the kn func invoke CLI command to send a test request to invoke a function either locally or on your OpenShift Container Platform cluster. You can use this command to test that a function is working and able to receive events correctly. Invoking a function locally is useful for a quick test during function development. Invoking a function on the cluster is useful for testing that is closer to the production environment.

Prerequisites

The OpenShift Serverless Operator and Knative Serving are installed on the cluster.
You have installed the Knative (kn) CLI.
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.
You must have already deployed the function that you want to invoke.

Procedure

Invoke a function:
```
$ kn func invoke
```
- The kn func invoke command only works when there is either a local container image currently running, or when there is a function deployed in the cluster.
- The kn func invoke command executes on the local directory by default, and assumes that this directory is a function project.