Abstract: The exponential growth of data-intensive applications ranging from Generative AI to Big Data analytics has led to a surge in the energy consumption of cloud data centers. In 2026, data centers are projected to account for approximately 3.5% of global electricity usage, necessitating a shift toward "Green Cloud Computing." Traditional resource allocation methods often rely on static thresholds or manual scaling, which frequently lead to either over-provisioning (wasting energy) or under-provisioning (violating Service Level Agreements - SLAs).