The following modification to a virtual service will inject an HTTP 400 code for 5% of the requests and abort instead of terminating to simulate a failure:

spec:
  hosts:
  - ratings
  http:
  - fault:
      abort:
        percentage:
          value: 0.05
        httpStatus: 400
    route:
    - destination:
        host: ratings
        subset: v1

Next, we'll discuss the service entry feature.