Cloud Computing technologies have become the backbone of modern IT infrastructures. Businesses usually adopt a multi-hybrid cloud strategy to achieve optimized portfolios of cloud services provided by different vendors and avoid single vendor lock-in. Meanwhile, this strategy brings technical challenges and complexities to build, manage and operate multi-hybrid clouds. JointCloud is used to refer to but not limited to Hybrid-Cloud, Inter-Cloud, Multi-Cloud, Cloud Federation, Cross-Cloud and Cloud Service Broker (CSB) etc.