Showing Posts for Tag: Application-Modernization ⁽⁶⁾

Deploying the Modernized 3-Tier Application on Kubernetes In the previous parts of this series we: In this final part we deploy the application on Kubernetes, recreating the original architecture using Kubernetes primitives. The key goal is to demonstrate how a traditional architecture can move to Kubernetes without rewriting the application… Read More

Preparing the Application for Kubernetes In the previous article, I completed an important milestone in the modernization journey of my demo application. The entire stack can now run using Docker Compose, including: At this point the application is fully containerized and reproducible. Running the system locally requires only a single… Read More

Running the Application with Docker Compose In the previous article, I containerized the main components of my VM-based 3-tier application by creating Docker images for the Flask application and the FastAPI backend. At that point, the services were packaged, but they were still isolated. The next step was to run… Read More

Containerizing the Application with Docker In the previous article, I prepared the application for containerization by removing the VM-specific assumptions that were embedded in the code. Two key changes were made: These changes allow configuration to be supplied dynamically through environment variables, which is a core requirement for containerized applications. Read More

Preparing the Application for Containerization In the previous article, I introduced the VM-based 3-tier application that I built and explained how the system works across its three tiers: The architecture itself is solid and does not need to change immediately. However, the deployment model is tightly coupled to virtual machines. Read More

Understanding the Original Architecture Over the years I’ve built several small demo environments to explain infrastructure and cloud concepts to customers and engineers. One of the most useful demos I created was a simple 3-tier application deployed entirely on virtual machines. You can check the application in the earlier blog… Read More