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example-flask-k8s's Introduction

example-flask-k8s

Este ejemplo crea una API basica de flask, con un consumidor que accede desde el service a la API. Para exponer la API se creó un servicio tipo NodePort el cual expone un puerto en todos los nodos para que la API sea accesible desde fuera del cluster y por el consumer desde el nodo.

Requisitos

  • Cluster de k8s (minikube o docker-desktop)
  • Docker
  • kubectl
  • Make

Build las imagenes del API y el Consumer

make build-flask-app
make build-consumer

Para que el cluster de k8s haga pull de las images en local se usa el parámetro imagePullPolicy en Never asi evitamos que intente accder a internet a buscar las imagenes y las busque en local

Aplicar los deployments

kubectl apply -f ./manifest/deployments/flask-app.yaml \
    -f ./manifest/deployments/consumer.yaml \
    -f ./manifest/services/flask-app.yaml

Borrar todo

kubectl delete -f ./manifest/deployments/flask-app.yaml \
    -f ./manifest/deployments/consumer.yaml \
    -f ./manifest/services/flask-app.yaml

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