Microservice Modernization for Enterprise Service Migration Using AWS Cloud Architecture (Published)
Enterprises operating large, monolithic service-oriented platforms increasingly face constraints in scalability, deployment velocity, and operational resilience. This paper presents a structured approach to modernizing enterprise monolithic applications into cloud-native microservices deployed on Amazon Web Services (AWS). We propose a six-phase migration methodology grounded in domain-driven design and the strangler fig pattern, enabling incremental extraction of business capabilities without disrupting production systems. A reference AWS architecture is presented, combining Amazon ECS and EKS for container orchestration, Amazon API Gateway for edge routing, AWS App Mesh for service-to-service communication, and a polyglot persistence layer spanning Amazon Aurora, DynamoDB, and ElastiCache. The proposed methodology was evaluated through a case-style implementation involving decomposition of a legacy order-management monolith into independently deployable services. Empirical results indicate a 68% reduction in average response time, a twelvefold increase in deployment frequency, and substantially improved mean time to recovery compared to the legacy baseline. The paper also examines cost implications, security controls, and organizational readiness factors that influence migration outcomes, concluding with recommendations for enterprises planning similar modernization initiatives.
Keywords: AWS, Cloud-Native Architecture, DevOps, Legacy modernization, container orchestration, domain-driven design, enterprise migration, microservices, service mesh, strangler fig pattern
Best Practices for Implementing Zero Trust in Enterprise Kubernetes Clusters (Published)
This article presents comprehensive guidance for implementing Zero Trust security architecture in enterprise Kubernetes environments. Drawing from real-world implementation experiences at SAP Labs, it addresses the security challenges inherent in the dynamic, ephemeral nature of containerized workloads. The framework established spans five critical domains: Role-Based Access Control, service mesh integration for secure pod communication, workload segmentation strategies, and policy-as-code enforcement. Each domain is explored with practical implementation patterns and organizational adoption considerations. The integration of identity management, mutual TLS, namespace isolation, admission controllers, and continuous compliance monitoring creates a defense-in-depth strategy aligned with Zero Trust principles. This guidance serves security architects and Kubernetes administrators tasked with hardening enterprise deployments while balancing security requirements with operational efficiency. By providing a structured approach to authentication, authorization, network security, and policy enforcement, the architecture enables systematic verification of every access request, regardless of origin, thus creating a robust security foundation that adapts to the ephemeral nature of containers while maintaining strong governance controls across distributed microservices architectures in complex enterprise environments.
Keywords: RBAC, kubernetes security, policy-as-code, service mesh, workload segmentation, zero trust