• Venkata Sai Sandeep Velaga

Legacy architectures complicate the enterprise systems' ability to meet the demands of fast-moving markets. Existing systems often suffer from non-scalable architectures, tight coupling, and long maintenance cycles, meaning that they cannot adapt to their current environment. These monolithic applications are fragile, making them incapable of responding effectively to their environment, and have limited opportunities to integrate with other systems and services. These factors lead to long-term incentives to build larger and more expensive systems with minimal operational flexibility. This paper provides an organized hybrid cloud migration framework that allows the gradual migration of legacy enterprise applications to modular, scalable microservices deployed in Microsoft Azure. The proposed framework presents a phased approach to migration, which begins with system assessment and modularization before proceeding with containerization, orchestration with the Azure Kubernetes Service (AKS), and deployment and integration with Azure API Management and Azure Service Bus. It uses hybrid cloud capabilities that will allow critical legacy components to remain on-premises, but provide new functionality in the cloud to achieve continued business operations with reduced risk. The framework also includes DevOps techniques for automated deployment and monitoring, enhanced security with Azure Active Directory and Zero Trust practices, and system observability in real-time with Azure Monitor and Applications Insights. This paper has provided technical details and implementation approaches for those organizations that want to modernize their IT with hybrid cloud and microservices architecture through digital agility and cloud-native permanency.

Hybrid Cloud, Microservices, Azure, Legacy Modernization, Cloud Migration, API Gateway, Containerization, AKS

"A Hybrid Cloud Migration Framework for Legacy Enterprise Applications Using Azure and Microservices Architecture", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.12, Issue 4, page no.k390-k394, April-2025, Available :http://www.jetir.org/papers/JETIR2504A48.pdf

"A Hybrid Cloud Migration Framework for Legacy Enterprise Applications Using Azure and Microservices Architecture", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.12, Issue 4, page no. ppk390-k394, April-2025, Available at : http://www.jetir.org/papers/JETIR2504A48.pdf