Using the Bookinfo example app from the site, I have tried to setup weighted routing with stickiness.
This is the destination rule I’ve used:
apiVersion: networking.istio.io/v1alpha3
kind: DestinationRule
metadata:
name: reviews
spec:
host: reviews
trafficPolicy:
loadBalancer:
consistentHash:
useSourceIp: true
subsets:
- name: v1
labels:
version: v1
- name: v2
labels:
version: v2
- name: v3
labels:
version: v3
This is the virtualservice I have used:
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
name: reviews
spec:
hosts:
- reviews
http:
- route:
- destination:
host: reviews
subset: v1
weight: 80
- destination:
host: reviews
subset: v2
weight: 15
- destination:
host: reviews
subset: v3
weight: 5
When neither have been applied the bookinfo app routes traffic amongst the three reviews versions using the default method and they all get about the same traffic.
When I just have the virtualservice applied, the traffic is routed using the weights provided.
When I just have the destination rule applied, the traffic is routed with stickiness in effect.
However, when I have both applied at the same time it appears the stickiness is no longer taken in to account. Is there any way to be able to use the destination rules’ consistent hash LB feature along with custom weighting for subsets of a service?