Hackforge Academy

Explanation

GitHub is a cloud-based platform used to host Git repositories and collaborate on source code. In DevOps, it acts as the central source code repository where developers store application code, Dockerfiles, Jenkinsfiles, Kubernetes YAML files, and other deployment configurations.

Code:

Developer
    ↓
git push
    ↓
GitHub Repository
    ↓
Jenkins / GitHub Actions
    ↓
Build → Test → Deploy

Explanation

GitHub provides version control using Git. Developers can commit changes, create branches, compare code, merge changes, and restore previous versions. This makes it easier for multiple developers to work on the same DevOps project.

Code:

git clone <repository-url>
git checkout -b feature/login
git add .
git commit -m "Add login API"
git push origin feature/login

Explanation

GitHub can trigger Jenkins automatically whenever developers push new code. A webhook sends an event from GitHub to Jenkins, which can then start the CI/CD pipeline to build, test, package, and deploy the application.

Code:

Developer
   ↓
git push
   ↓
GitHub
   ↓
Webhook
   ↓
Jenkins
   ↓
Maven Build → Test → Docker → Deploy

Explanation

A DevOps repository can contain not only application source code but also the files required for automation and deployment. Jenkinsfile defines the Jenkins pipeline, Dockerfile defines the container image, and Kubernetes YAML files define application deployment.

Code:

student-api/
├── src/
├── pom.xml
├── Dockerfile
├── Jenkinsfile
└── k8s/
    ├── deployment.yaml
    └── service.yaml

Explanation

GitHub acts as the starting point of a complete DevOps pipeline. After code is pushed, Jenkins can automatically build and test the Spring Boot application, create a Docker image, push it to a container registry, and deploy it to Kubernetes on AWS or Azure.

Code:

GitHub
   ↓
Jenkins
   ↓
Maven + JUnit
   ↓
Docker Build
   ↓
ECR / ACR
   ↓
Kubernetes
   ↓
AWS / Azure
   ↓
Production