Scientific Calculator with DevOps Integration

Overview

This project is a Scientific Calculator implemented in Java and containerized using Docker. It follows DevOps best practices by integrating Jenkins for CI/CD, Docker for containerization, and Ansible for local deployment.

Features

• Mathematical Functions:
  • Square Root (√x)
  • Factorial (x!)
  • Natural Logarithm (ln(x))
  • Power Function (x^b)
• Dockerized for easy deployment
• Automated deployment using Ansible
• CI/CD Integration with Jenkins

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Prerequisites

Make sure you have the following installed:

• Java 11 or later
• Docker
• Ansible (for local deployment)
• Jenkins (for CI/CD automation)
• Git

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Installation & Setup

1. Clone the Repository

git clone https://github.com/your-username/scientific-calculator.git
cd scientific-calculator

2. Build the Java Application

javac -d . src/com/aman/ScientificCalculator.java
jar -cvf ScientificCalculator.jar -C . com

3. Run Locally (Without Docker)

java -jar ScientificCalculator.jar

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Docker Setup

1. Build Docker Image

docker build -t amanbh321/scientific-calculator:v3 .

2. Run Docker Container

docker run -d --name scientific-calculator -p 9090:8080 amanbh321/scientific-calculator:v3

3. Check Running Container

docker ps

4. View Logs

docker logs scientific-calculator

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Ansible Deployment

1. Run Ansible Playbook

ansible-playbook deploy.yml

This will:

• Start the Docker service
• Pull the latest Docker image
• Stop any existing container
• Deploy the updated version

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CI/CD Pipeline with Jenkins

If Jenkins is configured, the following happens on git push:

1. Jenkins Pulls Latest Code
2. Builds Docker Image
3. Pushes to DockerHub
4. Deploys using Ansible

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How to Demonstrate the Project

1. Running the Calculator in Docker

docker exec -it scientific-calculator /bin/bash
java -jar /app/ScientificCalculator.jar

2. Access the Web App (If applicable)

http://localhost:9090

3. Stop and Remove Containers After Demo

docker stop scientific-calculator
docker rm scientific-calculator

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Troubleshooting

Check Docker Logs for Errors

docker logs scientific-calculator

Restart Docker Service

sudo systemctl restart docker

Rebuild & Redeploy If Issues Persist

docker rm -f scientific-calculator
docker rmi amanbh321/scientific-calculator:v3
docker build -t amanbh321/scientific-calculator:v3 .
docker run -d -p 9090:8080 amanbh321/scientific-calculator:v3

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Author

Aman Bahuguna

• GitHub: amanbh321
• DockerHub: amanbh321

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