Deploying a containerized web application | Kubernetes Engine

In this Project, I will show you how to deploy the web application as a load-balanced set of replicas that can scale to the needs of your users. In my previous project, I package a web application in a Docker container image and run the Container image. If You want to know visit my Project Deploy-WebApp-With-Docker

Step:- 1

• First we are going to push our docker image into Docker Hub
• Here are the steps that worked for me :

1. Login to the docker.

docker login -u sovu

2. Tag your image build

my image name here is : mylocalimage and by default it has tag : latestand my username is : sovu as registered with docker cloud, and I created a public repository named : dockerhub

so my personal repository becomes now : sovu/dockerhub and I want to push my image with tag : myfirstimagepush

I tagged as below :

docker tag mylocalimage:latest sovu/dockerhub:myfirstimagepush

3. Pushed the image to my personal docker repository as below

docker push sovu/dockerhub:myfirstimagepush

Step:- 2

• Now we will create a file with the name deployment.yml and then write the code for it.

apiVersion: apps/v1
kind: Deployment
metadata:
  name: web
spec:
  replicas: 1
  selector:
    matchLabels:
      app: web
  template:
    metadata:
      labels:
        app: web
    spec:
      containers:
      - name: portfolio-website
        image: docker.io/sovu/portfolio-website:latest
        ports:
        - containerPort: 8080

If You are not that familiar with the YAML let me tell you that indentation is very important if the indentation will be wrong it will not work.

Now save the file

Step:- 3

• Now I'm using Minikube as my Kubernetes cluster to run my web application
• Start the minikube

minikube start

• it will start one control node and one worker node.

Step:- 4

• Now let's run the command to deploy our web application.

kubectl apply -f deployment.yml

• kubectl Kubernetes command-line tool, kubectl, allows you to run commands against Kubernetes clusters. You can use kubectl to deploy applications, inspect and manage cluster resources, and view logs
• apply Manages applications through files defining Kubernetes resources. It creates and updates resources in a cluster through running kubectl apply
• f it mean we are applying file.
• We can use a command to see the deployment

kubectl rollout status deployment/web

Step:- 5

• Now we have successfully deployed our containerized web page or docker image that was pushed in the docker hub repository.
• Now we can expose the port so that we can see that we have deployed the application.

kubectl port-forward deployment/web-app 8080:80

• We are exposing our web application at host port 8080.

Step:- 6

• Now go to the browser and type at URL address bar localhost:8080 and your web page is working.