getting started example error

[hemantha-kumara]

Expected Behavior

https://github.com/tektoncd/triggers/tree/main/docs/getting-started All jobs should move to the completed state

Actual Behavior

send-cloud-event-pod task is failing with the logs 'Currently sendevent only supports JSON event data'

Steps to Reproduce the Problem

Additional Info

• Kubernetes version:

  Output of kubectl version:

Client Version: version.Info{Major:"1", Minor:"25", GitVersion:"v1.25.2", GitCommit:"31aa3e89a926f81aa0af30320ffcb71acadf3015", GitTreeState:"clean", BuildDate:"2023-04-19T07:34:25Z", GoVersion:"go1.19.6", Compiler:"gc", Platform:"linux/amd64"}
Kustomize Version: v4.5.7
Server Version: version.Info{Major:"1", Minor:"26+", GitVersion:"v1.26.7-eks-2d98532", GitCommit:"c9c3fc1fdf677f38b8d26568c10b921a1235fa43", GitTreeState:"clean", BuildDate:"2023-07-28T16:51:21Z", GoVersion:"go1.20.6", Compiler:"gc", Platform:"linux/amd64"}

- Tekton Pipeline version:

**Output of `tkn version` or `kubectl get pods -n tekton-pipelines -l app=tekton-pipelines-controller -o=jsonpath='{.items[0].metadata.labels.version}'`**
v0.50.0

<!-- Any other additional information -->

[hemantha-kumara]

The issue could be due to the pipeline task send-cloud-event is not having the below three params(especially data)

  - name: eventType
    value: "test-event-type"
  - name: source
    value: "event-source-5000"
  - name: data
    value: "{\"data\": \"dude\"}"

I added these three params in the pipeline and it started working.

[hemantha-kumara]

Reference https://github.com/tektoncd/catalog/blob/main/task/cloudevent/0.1/samples/run.yaml

[Xieql]

I recently followed the steps provided in the Getting Started guide of the Tekton Triggers repository at
https://github.com/tektoncd/triggers/tree/main/docs/getting-started and encountered the same issue discussed in this thread.

It appears to be linked to the configuration in the pipeline.yaml file:

triggers/docs/getting-started/pipeline.yaml

Lines 56 to 69 in 8b92bb2

	- name: send-cloud-event
	taskRef:
	resolver: hub
	params:
	- name: name
	value: cloudevent
	- name: version
	value: 0.1
	params:
	- name: sink
	# URL of the Service we create below
	value: http://event-display.getting-started.svc.cluster.local
	- name: eventID
	value: $(context.taskRun.name)

. An update to this part of the documentation might be beneficial.

As @hemantha-kumara mentioned, adding essential variables could resolve the issue. This update could prevent similar issues for new users and streamline the initial setup process.