Istio-learning-note-about-Traffic Shifting（三）

istio:
If you want use the gateway api recoures "Httproute" to Traffic Shifting your app flow rate, 

Here is a yaml about Traffic Shifting within istio.

apiVersion: gateway.networking.k8s.io/v1beta1
kind: HTTPRoute
...
spec:
  parentRefs:
  - group: ""
    kind: Service
    name: reviews
    port: 9080
  rules:
  - backendRefs:
    - group: ""
      kind: Service
      name: reviews-v1
      port: 9080
      weight: 50
    - group: ""
      kind: Service
      name: reviews-v3
      port: 9080
      weight: 50
    matches:
    - path:
        type: PathPrefix
        value: /

the will lei flow rate %50 to service reviews-v1  and %50 to service reviews-v3.

You can refresh the website to see what happening .

And if you  service reviews-v3 is working and have no bug ,you can  lei flow rate %100 to reviews-v3.

like :

apiVersion: gateway.networking.k8s.io/v1beta1
kind: HTTPRoute
...
spec:
  parentRefs:
  - group: ""
    kind: Service
    name: reviews
    port: 9080
  rules:
  - backendRefs:
    - group: ""
      kind: Service
      name: reviews-v3
      port: 9080
    matches:
    - path:
        type: PathPrefix
        value: /