The article explores the integration of Spring Boot with Kubernetes to enhance the scalability and elasticity of applications and databases, particularly using NoSQL databases like Couchbase. It highlights the advantages of using document databases due to their efficient data management capabilities and how Kubernetes facilitates the scaling of both stateless and stateful applications. The author provides a detailed walkthrough of creating a scalable and elastic User Profile Microservice, utilizing tools such as Spring Data, Couchbase, and Docker, and deploying it on Kubernetes. The guide includes steps for configuring the database, creating Docker images, setting up Kubernetes secrets, deploying applications, and managing load balancing. It also addresses scaling strategies for handling increased user demand, such as during high-traffic events like Black Friday, and discusses the challenges of scaling stateful databases compared to stateless applications. The article concludes by emphasizing the importance of planning for the scalability of all infrastructure components to avoid bottlenecks and indicates future discussions on achieving a truly production-ready architecture.