consistentHash with service entry

1

Hi,

I’m having some trouble with ‘consistentHash’ with a service entry.

My service entry is a external service with static resolution having multiple endpoints, i was expecting to make a request with a header and subsequent request would use the same service entry endpoint. But that doesn’t seem to work out.

DestinationRule:

apiVersion: networking.istio.io/v1beta1
kind: DestinationRule
metadata:
  name: external-host
spec:
  host: my-host.com
  trafficPolicy:
    loadBalancer:
      consistentHash:
        httpHeaderName: x-test

ServiceEntry:

apiVersion: networking.istio.io/v1beta1
kind: ServiceEntry
metadata:
  name: external-host
spec:
  hosts:
  - my-host.com
  addresses:
  - 196.168.34.1/32
  ports:
  - number: 80
    name: http
    protocol: HTTP
  - number: 443
    name: https
    protocol: HTTPS
  location: MESH_EXTERNAL
  resolution: STATIC
  endpoints:
    - address: x.x.x.x
      ports:
        https: 8080
    - address: x.x.x.x
      ports:
        https: 8081

I was expecting to see either x.x.x.x:8080 or x.x.x.x:8081 on my logs while using the same header for the host my-host.com but that’s not happening. Has anyone been through this? Is this a valid use case for Istio?