One of the most interesting trends in cloud computing is the emergence of “hybrid” solutions which span environments that were historically isolated from one another. A traditional data center offers finite capacity in support of business applications, but it is ultimately limited by obvious constraints (physical space, power, cooling, etc.). Virtualization has extended the runway a bit, effectively increasing density within the data center, however the physical limits remain. Cloud computing opens the door to huge pools of computing capacity worldwide. This “infinite” capacity is proving tremendously compelling to IT organizations, providing on-demand access to resources to meet short and long-term needs. The emerging challenge is integration—combining these disparate environments to provide a seamless and secure platform for computing services. CloudSwitch provides a software solution that allows users to extend a data center environment into the public cloud securely without modification of workloads or network configurations. I’d like to discuss a specific example of how CloudSwitch delivered a solution which spanned environments in a corporate data center and external cloud.
A large financial services company approached us some time ago with an ambitious plan to leverage cloud computing as a strategic initiative within the organization. Their goals were to reduce operating costs, improve responsiveness to the various business units, and differentiate themselves within the industry through technological innovation. Security was a fundamental requirement and a number of risk assessment groups were involved throughout the design and evaluation phases of the engagement. Finally, this company also wanted to leverage a traditional colo environment from their cloud vendor to provide high-speed access to shared storage while also supporting their traffic monitoring equipment. After a period of technical diligence, we established a reference architecture which satisfied all internal security requirements while remaining true to the fundamental goal of moving to a dynamic cloud environment. The result was a true realization of the hybrid model.
In the customer’s reference architecture, there are three primary components:
The CloudSwitch Appliance is deployed into the customer’s data center environment to allow central management of one or more colo environments. Each of these environments supports an isolated cloud deployment, for example for a particular business unit. CloudSwitch’s virtual switch and bridge components are implemented for high-speed connectivity between cloud servers and shared storage. Finally, the public cloud environment is used to host actual customer workloads (operating systems). Network communication and local storage are protected through CloudSwitch’s secure overlay network and transparent disk encryption functionality.
This approach yields several benefits:
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