Multi-Cloud Service Chain Orchestration Scheme Based on Security Assurance and Quality of Service

Existing multi-cloud orchestration solutions cannot adequately balance dynamic cross-domain security needs with real-time Quality of Service (QoS) guarantees, exposing service chains to coordinated attack risks. This study designs the online orchestration framework for service chain orchestration in multicloud environment (MCE-SCO). On this basis, this framework provides a solution for efficient automatic coordination in crossdomain scenarios. The experimental results show that the proposed model achieve better results than the baseline models in offline orchestration tasks. In order to cope with the irregular arrival of user requests, the online orchestration strategy is designed to cooperate with the deep reinforcement learning model to complete the online orchestration task. In the online orchestration task, the proposed method reduces the average composite objective index by at least 10.5% compared with other models, and better realizes the orchestration effect of service chain satisfying security assurance and QoS. The multi-cloud service chain orchestration scheme sets a foundation for future robust, efficient, and secure service provision in multi-cloud environments, improving reliability and performance of virtual service ecosystems.