Publish an event source to your cluster¶

Start a minikube cluster:
```
minikube start
```

Setup ko to use the minikube docker instance and local registry:

eval $(minikube docker-env)
export KO_DOCKER_REPO=ko.local

Apply the CRD and configuration YAML:
```
ko apply -f config
```

Once the sample-source-controller-manager is running in the knative-samples namespace, you can apply the example.yaml to connect our sample-source every 10s directly to a ksvc.

apiVersion: serving.knative.dev/v1
kind: Service
metadata:
  name: event-display
  namespace: knative-samples
spec:
  template:
    spec:
      containers:
        - image: gcr.io/knative-releases/knative.dev/eventing/cmd/event_display
---
apiVersion: samples.knative.dev/v1alpha1
kind: SampleSource
metadata:
  name: sample-source
  namespace: knative-samples
spec:
  interval: "10s"
  sink:
    ref:
      apiVersion: serving.knative.dev/v1
      kind: Service
      name: event-display

ko apply -f example.yaml

Once reconciled, you can confirm the ksvc is outputting valid cloudevents every 10s to align with our specified interval.

% kubectl -n knative-samples logs -l serving.knative.dev/service=event-display -c user-container -f

☁️  cloudevents.Event
Validation: valid
Context Attributes,
  specversion: 1.0
  type: dev.knative.sample
  source: http://sample.knative.dev/heartbeat-source
  id: d4619592-363e-4a41-82d1-b1586c390e24
  time: 2019-12-17T01:31:10.795588888Z
  datacontenttype: application/json
Data,
  {
    "Sequence": 0,
    "Heartbeat": "10s"
  }
☁️  cloudevents.Event
Validation: valid
Context Attributes,
  specversion: 1.0
  type: dev.knative.sample
  source: http://sample.knative.dev/heartbeat-source
  id: db2edad0-06bc-4234-b9e1-7ea3955841d6
  time: 2019-12-17T01:31:20.825969504Z
  datacontenttype: application/json
Data,
  {
    "Sequence": 1,
    "Heartbeat": "10s"
  }