A canary deployment is a strategy for safely rolling out a new version of a service. With Istio, you can use percentage-based traffic splitting to direct a small amount of traffic to the new version. Then you can run a canary analysis on v2 (like check latency and error rate), and finally direct more traffic at the new version until it’s serving all traffic.
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
name: helloworld
spec:
hosts:
- helloworld
http:
- route:
- destination:
host: helloworld
subset: v1
weight: 90
- destination:
host: helloworld
subset: v2
weight: 10
apiVersion: networking.istio.io/v1alpha3
kind: DestinationRule
metadata:
name: helloworld
spec:
host: helloworld
subsets:
- name: v1
labels:
version: v1
- name: v2
labels:
version: v2