anthos/k8s-manifest/cartservice-fault.yaml

apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: cartservice
spec:
  hosts:
  - cartservice
  http:
  - fault:
      abort:
        httpStatus: 500
        percentage:
          value: 20
    route:
    - destination:
        host: cartservice