Use Multiple Sources in One EventSource

This document describes how to use multiple sources in one EventSource.

Prerequisites

• You need to create a function as the target function to be triggered. Please refer to Create a function for more details.
• You need to create a Kafka cluster. Please refer to Create a Kafka cluster for more details.

Use Multiple Sources in One EventSource

1. Use the following content to create an EventSource configuration file (for example, eventsource-multi.yaml).

   Note

   • The following example defines an event source named my-eventsource and mark the events generated by the specified Kafka server as sample-three.
   • spec.sink references the target function (Knative service).
   • The configuration of spec.cron is to trigger the function defined in spec.sink every 5 seconds.

   apiVersion: events.openfunction.io/v1alpha1
   kind: EventSource
   metadata:
     name: my-eventsource
   spec:
     logLevel: "2"
     kafka:
       sample-three:
         brokers: "kafka-server-kafka-brokers.default.svc.cluster.local:9092"
         topic: "events-sample"
         authRequired: false
     cron:
       sample-three:
         schedule: "@every 5s" 
     sink:
       uri: "http://openfunction.io.svc.cluster.local/default/sink"
   

2. Run the following command to apply the configuration file.

   kubectl apply -f eventsource-multi.yaml
   

3. Run the following commands to observe changes.

   $ kubectl get eventsources.events.openfunction.io
   NAME             EVENTBUS   SINK   STATUS
   my-eventsource                     Ready
   
   $ kubectl get components
   NAME                                                      AGE
   serving-vqfk5-component-esc-cron-sample-three-dzcpv       35s
   serving-vqfk5-component-esc-kafka-sample-one-nr9pq        35s
   serving-vqfk5-component-ts-my-eventsource-default-q6g6m   35s
   
   $ kubectl get deployments.apps
   NAME                                       READY   UP-TO-DATE   AVAILABLE   AGE
   serving-4x5wh-ksvc-wxbf2-v100-deployment   1/1     1            1           3h14m
   serving-vqfk5-deployment-v100-vdmvj        1/1     1            1           48s