Chapter 15. Using ContainerSource with Service Mesh

Procedure

1. Create a Service in a namespace that is member of the ServiceMeshMemberRoll:

   Example event-display-service.yaml configuration file

   apiVersion: serving.knative.dev/v1
   kind: Service
   metadata:
     name: event-display
     namespace: <namespace> 

   1

   
   spec:
     template:
       metadata:
         annotations:
           sidecar.istio.io/inject: "true" 

   2

   
           sidecar.istio.io/rewriteAppHTTPProbers: "true"
       spec:
         containers:
         - image: quay.io/openshift-knative/knative-eventing-sources-event-display:latest

   • namespace: <namespace>: A namespace that is a member of the ServiceMeshMemberRoll.
   • sidecar.istio.io/inject: "true": This annotation injects Service Mesh sidecars into the Knative service pods.

2. Apply the Service resource by running the following command:

   $ oc apply -f event-display-service.yaml

3. Create a ContainerSource object in a namespace that is member of the ServiceMeshMemberRoll and sink set to the event-display:

   The following example displayes test-heartbeats-containersource.yaml configuration file:

   apiVersion: sources.knative.dev/v1
   kind: ContainerSource
   metadata:
     name: test-heartbeats
     namespace: <namespace>
   spec:
     template:
       metadata:
         annotations:
           sidecar.istio.io/inject": "true"
           sidecar.istio.io/rewriteAppHTTPProbers: "true"
       spec:
         containers:
           # This corresponds to a heartbeats image URI that you have built and published
           - image: quay.io/openshift-knative/heartbeats
             name: heartbeats
             args:
               - --period=1s
             env:
               - name: POD_NAME
                 value: "example-pod"
               - name: POD_NAMESPACE
                 value: "event-test"
     sink:
       ref:
         apiVersion: serving.knative.dev/v1
         kind: Service
         name: event-display-service

   • namespace: <namespace>: A namespace that is part of the ServiceMeshMemberRoll.
   • metadata: These annotations enable Service Mesh integration with the ContainerSource object.

4. Apply the ContainerSource resource by running the following command:

   $ oc apply -f test-heartbeats-containersource.yaml

5. Optional: Verify that events reach the Knative event sink by checking the message dumper function logs:

   You get an output similar to the following example command:

   $ oc logs $(oc get pod -o name | grep event-display) -c user-container

   You get an output similar to the following example:

   ☁️  cloudevents.Event
   Validation: valid
   Context Attributes,
     specversion: 1.0
     type: dev.knative.eventing.samples.heartbeat
     source: https://knative.dev/eventing-contrib/cmd/heartbeats/#event-test/mypod
     id: 2b72d7bf-c38f-4a98-a433-608fbcdd2596
     time: 2019-10-18T15:23:20.809775386Z
     contenttype: application/json
   Extensions,
     beats: true
     heart: yes
     the: 42
   Data,
     {
       "id": 1,
       "label": ""
     }