scheduledeventing.md

Scheduled service

In this sample, we'll take a look at how to call a service on a schedule in Knative Eventing.

Consumer

For the event consumer, we can use the Event Display service in Hello World Eventing sample. Go through the steps mentioned there to create and deploy the Event Display service.

Ping event source - Service sink

Create a source.yaml in the same namespace (in this case default) as your service.

In this case, we have the service as the sink. We'll be calling the Event Display service every minute.

Create the PingSource:

kubectl apply -f source.yaml

Test the service

We can see that the service is triggered every minute in the service logs:

kubectl logs --follow <podid>

Event Display received event: {"message":"Hello world from ping!"}

Broker

Make sure there's a Broker in the default namespace by following instructions in Broker Creation page.

Event source - Broker sink

Next, setup PingSource to point to our Broker instead.

Create a source-broker.yaml.

In this case, we have the Broker in the default namespace as the sink.

Create the event source:

kubectl apply -f source-broker.yaml

You need to create a trigger.yaml to listen for events.

Notice that we're filtering on Ping events.

kubectl apply -f trigger.yaml

At this point, you should see scheduled events in the Event Display.