Rails Application - Complete DevOps Pipeline A comprehensive Ruby on Rails application demonstrating modern DevOps practices with Docker containerization, Kubernetes orchestration, ArgoCD GitOps deployment, and Tekton CI/CD pipelines.
This project showcases a full DevOps workflow for a Rails application with PostgreSQL database, featuring:
Containerization : Docker multi-stage builds with separate app and database containersOrchestration : Kubernetes deployment with StatefulSet for PostgreSQLGitOps : ArgoCD for declarative continuous deploymentCI/CD : Tekton pipelines for automated build and push workflowsIngress : NGINX ingress controller for traffic management
Tool
Version
Purpose
Docker
20.10+
Container runtime
Docker Compose
2.0+
Multi-container orchestration
Kubernetes
1.20+
Container orchestration
Minikube
1.25+
Local Kubernetes cluster
kubectl
1.20+
Kubernetes CLI
ArgoCD
2.5+
GitOps deployment
Tekton
0.40+
CI/CD pipelines
# Clone the repositorycd rails_app
# Docker deployment# Kubernetes deployment* .sh
./k8s-scripts/get-all-up.sh
Rails Application : Multi-stage Dockerfile with Ruby 3.2 and Rails 7PostgreSQL Database : Official PostgreSQL 15 image with custom initializationNetworking : Docker Compose bridge network for service communication
# Ensure Docker daemon is running# Pull pre-built image# Start the application stack# View application# Navigate to http://localhost:3000├── Dockerfile # Multi-stage Rails application build
├── docker-compose.yaml # Multi-container orchestration
├── init.sql # PostgreSQL initialization script
└── bin/docker-entrypoint # Container entry point script
Namespace : rails-app for resource isolationPostgreSQL : StatefulSet with persistent volume claimsRails App : Deployment with rolling update strategyServices : ClusterIP for internal communication, NodePort for external accessIngress : NGINX controller for HTTP routing
Set permissions and execute deployment scripts:
# Set execution permissions* .sh
# Automated deployment sequence# Initialize Minikube cluster# Create rails-app namespace# Deploy PostgreSQL StatefulSet# Deploy Rails application# Configure ingress# Verify deployment statusManual Access & Verification # Access application via NodePort# Connect to PostgreSQL for debugging# Check deployment status# Destroy all resourcesArgoCD continuously monitors the Git repository and automatically synchronizes the desired state with the Kubernetes cluster.
Declarative Configuration : Infrastructure as Code approachAutomated Sync : Continuous deployment from Git repositoryRollback Capability : Easy reversion to previous application statesMulti-Environment Support : Separate configurations for dev/staging/prod
The Tekton pipeline automates the complete CI/CD workflow:
Source Code Fetch : Clone repository from GitHubContainer Build : Build Docker image using KanikoImage Push : Upload to Docker Hub registryDeployment Trigger : Notify ArgoCD for automatic deployment
# Initialize and execute Tekton components# Monitor pipeline execution# Access Tekton Dashboard# Visit: http://localhost:9097# Remove all Tekton resourcesrails_app/
├── app/ # Rails application code
├── config/ # Application & ArgoCD configuration
│ └── argocd/ # ArgoCD GitOps manifests
├── kubernetes-files/ # Kubernetes deployment manifests
├── k8s-scripts/ # Automated deployment scripts
├── tekton/ # CI/CD pipeline definitions
├── Dockerfile # Container build instructions
├── docker-compose.yaml # Local development stack
└── README.md # This documentation
Fork the repository
Create a feature branch (git checkout -b feature/amazing-feature)
Commit your changes (git commit -m 'Add amazing feature')
Push to the branch (git push origin feature/amazing-feature)
Open a Pull Request
This project is licensed under the MIT License - see the LICENSE file for details.