K8S

Utilities and examples for kubernetes

Production deployments stragies

Canary Releases

Canary Release is a production deployment strategy to ensure new releases are robust and stable.

Canary Release redirects a percentage of the traffic from one pod to another so that possible bugs in the new version have a very limited impact.

The traffic will increase until reaching 100% and the new version will replace the current one.

During the increment of the canary, errors will be checked, if they exist, and the % of the canary will be increased accordingly.

Create sample app1:

$ kubectl apply -f ./canary/app1.yaml

Create sample app2:

$ kubectl apply -f ./canary/app2.yaml

Create ingress from app1:

$ kubectl apply -f ./canary/app1-ingress.yaml

Editing ./canary/app2-ingress.yaml, and modify 'nginx.ingress.kubernetes.io/canary-weight' to update canary percentage

metadata:
  annotations:
    nginx.ingress.kubernetes.io/canary: "true"
    nginx.ingress.kubernetes.io/canary-weight: "25"
    kubernetes.io/ingress.class: public
  name: nginx-ingress-canary
  namespace: default

Create/update ingress from app2:

$ kubectl apply -f ./canary/app2-ingress.yaml

You can apply this file n times to update canary to your percentage.