kubevela/docs/examples/workflow/canary-rollout

Canary Rollout

Prerequisite

enable istio addon in you cluster

vela addon enable istio

enable label istio injection in default namespace

kubectl label namespace default istio-injection=enabled

Canary rollout workflow

First deployment

Apply this YAML to deploy application.

kubectl apply -f first-deploy.yaml

Use kubectl port-forward map gateway port to localhost

kubectl port-forward -n istio-system service/istio-ingressgateway 9082:80

Wait a few minutes, when rollout have finished. Request back-end service by gateway several times.

curl  http://127.0.0.1:9082/server

Will always see return page of httpd like this.

Demo: v1

Canary rollout part of traffic and replicas to new revision

kubectl apply -f rollout-v2.yaml

Request back-end service by gateway several times.

curl http://127.0.0.1:9082/server

This's a 90% chance still see return page of v1, and 10% see return page of v2 like this.

Demo: v2

Rollout rest traffic and replicas to new revision

vela workflow resume  canary-test

Wait a few minutes, when rollout have finished. Request back-end service by gateway several times.

curl http://127.0.0.1:9082/server

Will always see return page of v2.