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