SimpleCalculator-KubernetesDepoyment

This project provides a lightweight and efficient deployment of a simple calculator web application built with HTML, CSS, and JavaScript. We leverage the power of Docker for containerization and Kubernetes for orchestration, ensuring a scalable and manageable application lifecycle.

This guide outlines the steps for building the Docker image on a separate server and deploying it within a Kubernetes cluster. This separation aligns with best practices, as it keeps your development and build environments dedicated, while Kubernetes focuses solely on managing and running the application.

Building the Docker Image

1. Prerequisites:

• Docker: Ensure Docker is installed and running on your local machine.

• Docker Hub Account: Create a Docker Hub account.

• Project Files: Make sure your HTML, CSS, and JavaScript files are organized in the appropriate directories To get started, clone this project using Git: https://github.com/Ad-Amrit/SimpleCalculator-KubernetesDepoyment.git

2. Build:

• Open a terminal or command prompt and navigate to the project's root directory.

• Run the following command to build the Docker image:

• docker build -t /simple-calculator . (example: docker build -t adamrit/simple-calculator .) Replace with your Docker Hub username

Pushing the Docker Image

1. Login:

• To push the image to Docker Hub, log in with your Docker Hub credentials: docker login

2. Tag Image:

• Tag the image with your desired username and repository name: docker tag simple-calculator /simple-calculator:latest

3. Push Image:

• Push the image to Docker Hub: docker push /simple-calculator:latest

Deploying the Application using Kubernetes

1. Prerequisites:

• A Kubernetes cluster configured and accessible.

• kubectl command-line tool installed and configured to interact with your cluster.

2. Create Kubernetes Manifests:

• Create YAML files to define the deployment and service for your application: deployment.yaml: This file defines how replicas of your application should be deployed and managed. service.yaml: This file exposes your application running in pods as a service that other components can access.

(Note: You can write deployment and service in same yaml file)

3. Apply Manifests:

• Apply the YAML files to your Kubernetes cluster using the kubectl apply command: kubectl apply -f simple-calculator.yaml

4. Access the Application:

• Retrieve the service's external IP or internal cluster IP using kubectl get service To check from the command line, type curl <Internal-IP> (e.g: curl 10.110.11.22)

• Access the calculator at http://<IP_address>:. (e.g: 192.168.56.20:31100)