Deploying a Production-Ready Multi-Tier Web Application on Kubernetes Using kOps (AWS)

Overview

This document outlines the design and deployment of a production-ready, highly available, fault-tolerant multi-tier web application using Kubernetes. The application was containerized and tested prior to deployment, and the infrastructure provisioning was carried out using kOps on AWS.

Scenario

A containerized web application stack (Tomcat + MySQL + RabbitMQ + Memcached) is to be deployed in a robust and scalable fashion with the following requirements:

High availability for services and compute nodes
Auto-healing capabilities
Seamless horizontal scaling
Portability across environments
Platform-agnostic deployment

Architecture Overview

Technologies Used

Layer	Tool/Service
Containerization	Docker (Images on DockerHub)
Orchestration	Kubernetes
Infrastructure	AWS (EBS, EC2, S3, Route53)
Cluster Provisioning	kOps
Routing	NGINX Ingress Controller
CI Interface	Vagrant (VM for kubectl + kOps CLI)

Application Stack

Component	Description
Tomcat (WAR)	Main web application (Java)
MySQL	Stateful backend database
Memcached	Cache layer
RabbitMQ	Message broker
NGINX Ingress	External traffic routing

Each service runs in its own Kubernetes Deployment. For internal communication, ClusterIP services are configured. External traffic reaches the application through an Ingress controller backed by an AWS ELB.