This is to demonstrate how to create a docker image for simple Flask app and deploy it on Kubernetes

Requirements: Have Docker and kubernetes installed.

Commands to build docker image, tag it, push it

docker build -t flaskapp_withproductpage .

docker tag flaskapp gcr.io/<GCP project ID>/flaskapp_withproductpage

docker push gcr.io/<GCP project ID>/flaskapp_withproductpage

Then deploy it on k8s

kubectl run flaskapp-withproductpage --image=gcr.io/<GCP project ID>/flaskapp_withproductpage --port 8080

kubectl apply -f .\flaskapp-withproductpage-svc.yml

Check the app is running by clicking on the load balancer service in K8S cluster

For Istio:

If you are deploying on a kubernetes cluster which has Istio, then you need to expose the deployment as ClusterIP

kubectl apply -f .\flaskapp-withproductpage-svc.yml

Apply the gateway, virtual service for the app.

kubectl apply -f flask-productpage-gateway-vsvc.yml

Add the service entries for google.com and time.jsontest.com

kubectl apply -f google-serviceentry.yml
kubectl apply -f time-jsontest-serviceentry.yml