Deploy a Full Stack Web Application over Kubernetes

In this project, we'll deploy a complete full-stack Ruby on Rails application with a PostgreSQL database using Docker containerization and Kubernetes orchestration. Kubernetes is an industry-standard container orchestration platform that automates deployment, scaling, and management of containerized applications, providing features like automatic restarts, load balancing, and rolling updates. We'll follow microservices architecture principles by deploying the frontend and database as separate services, demonstrating modern cloud-native application deployment practices.

We'll start by containerizing the Rails web application using Docker, creating Docker images, and pushing them to Docker Hub for centralized image storage. Next, we'll create a Kubernetes cluster and deploy the PostgreSQL database as a stateful service with persistent storage, then expose it using a Kubernetes Service for internal networking. We'll deploy the frontend application as a separate deployment, configure environment variables through ConfigMaps to inject database credentials and connection settings, and create a LoadBalancer Service to expose the application for external access.

Finally, we'll configure both database and frontend deployments with proper resource management, implement declarative configuration using YAML manifests, and verify the application is accessible globally through the Kubernetes Service endpoint. By the end, we'll have a production-ready deployment demonstrating Docker containerization, Kubernetes cluster management, microservices deployment, service discovery, ConfigMap configuration, and container orchestration applicable to any cloud deployment scenario.