Parallerl Flow

准备两个Filter

kn service create image-filter --image villardl/filter-nodejs:0.1 --env FILTER='event.type == "com.yang.file.image"' --scale-min=1
kn service create text-filter --image villardl/filter-nodejs:0.1 --env FILTER='event.type == "com.yang.file.text"' --scale-min=1

准备两个Subscriber

kn service create para-appender-image --image ikubernetes/appender --env MESSAGE=" - filetype/Image" --scale-min=1
kn service create para-appender-text --image ikubernetes/appender --env MESSAGE=" - filetype/Text" --scale-min=1

创建并查看parallel资源

[root@master parallel-demo]# kubectl apply -f 05-parallel.yaml
[root@master parallel-demo]# cat 05-parallel.yaml 
---
apiVersion: flows.knative.dev/v1
kind: Parallel
metadata:
  name: filetype-parallel
  namespace: default
spec:
  channelTemplate:
    apiVersion: messaging.knative.dev/v1
    kind: InMemoryChannel
  branches:
    - filter:
        ref:
          apiVersion: serving.knative.dev/v1
          kind: Service
          name: image-filter
      subscriber:
        ref:
          apiVersion: serving.knative.dev/v1
          kind: Service
          name: para-appender-image
    - filter:
        ref:
          apiVersion: serving.knative.dev/v1
          kind: Service
          name: text-filter
      subscriber:
        ref:
          apiVersion: serving.knative.dev/v1
          kind: Service
          name: para-appender-text
  reply:
    ref:
      apiVersion: serving.knative.dev/v1
      kind: Service
      name: event-display-01
[root@master parallel-demo]# kubectl get parallel
NAME                URL                                                                         AGE   READY   REASON
filetype-parallel   http://filetype-parallel-kn-parallel-kn-channel.default.svc.cluster.local   71s   True    

curl -v "http://filetype-parallel-kn-parallel-kn-channel.default.svc.cluster.local" -X POST -H "Content-Type: application/cloudevents+json" \
-d '{"id": "say-bye", "specversion": "1.0", "type": "com.yang.file.image", "source": "sendoff", "data": {"message":"Hello Knative Parallel Flow Image"}}'

curl -v "http://filetype-parallel-kn-parallel-kn-channel.default.svc.cluster.local" -X POST -H "Content-Type: application/cloudevents+json" \
-d '{"id": "say-bye", "specversion": "1.0", "type": "com.yang.file.text", "source": "sendoff", "data": {"message":"Hello Knative Parallel Flow Text"}}'

[root@master ~]# kubectl logs event-display-01-00001-deployment-68d48cbdf8-lv9m4 

原文地址：http://www.cnblogs.com/zyyang1993/p/16821172.html