Flaskapp for minikube

Running python flask app which shows the POD-ID where application is running

Getting Started

First we will use some other image for deployment than we will update that deployment to use this image.

Make Deployment with other image-

kubectl.exe run myflaskapp-forminikube --image=docker.io/mjindal/myflaskapp-forminikube:latest --port=5000

Expose Deployment

kubectl expose deployment/myflaskapp-forminikube --type="NodePort" --port 5000

View Deployment from host system (this will give the url where it is running)

minikube.exe service myflaskapp-forminikube --url

you should see the container id where app is running .

Now scale application to use 5 containers

kubectl.exe scale deployment myflaskapp-forminikube --replicas 5

Refresh the browser you should see different-different container id.

There should be exactly 5 pods running -

kubectl.exe get pods

Scale down replica to 1 - 4 pods should die immediately !

kubectl.exe scale deployment myflaskapp-forminikube --replicas 1

Now change the image

kubectl set image deployments/myflaskapp-forminikube myflaskapp-forminikube=mjindal/myflaskapp:latest

Prerequisites

What things you need to install the software and how to install them

Download kubectl and minikube.
Extract both in one folder and add the folder in path.

Installation

A step by step series of examples that tell you have to get a development env running

Install minikube

• minikube

Install Kubectl

• kubectl

Start Minikube

export PATH = $PATH:installation_dir
minikube start