focused_Canary_Testing.yaml

apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: flaskvirtualservice
spec:
  hosts:
  - "flask.example.com" # destination hosts to which traffic is being sent. The hosts field applies to both HTTP and TCP services
  gateways:
  - flask-gateway
  http:
  - match:
    - uri:
        prefix: /list
    - uri:
        prefix: /home
    route:
    - destination:
        host: flaskfrontend.default.svc.cluster.local
        subset: v1
        port:
          number: 5000
      weight: 90
    - destination:
        host: flaskfrontend.default.svc.cluster.local
        subset: v2 #  default to pods of the flaskfrontend service with label “version: v1” (i.e., subset v1)
        port:
          number: 5000
      weight: 10
  - match:
    - headers:
        canary:
          exact: "canary"
    route:
    - destination:
        host: flaskfrontend.default.svc.cluster.local
        subset: v2
        port:
          number: 5000
      weight: 100
---
apiVersion: networking.istio.io/v1alpha3
kind: DestinationRule
metadata:
  name: flaskdestinationrule
spec:
  host: flaskfrontend.default.svc.cluster.local
  subsets:
  - name: v1
    labels:
      version: v1 # this is latest tag in our image
  - name: v2
    labels:
      version: v2