This preface explains the objectives and intended audience of the Virtual Multi-tenant Data Center (VMDC) solution and outlines the organization of the Virtual Multi-tenant Data Center Design Guide.
Infrastructure as a Service (IaaS) simplifies application development and implementation by virtualizing underlying hardware resources and operating systems. This allows IaaS users to significantly cut development and deployment times by cloning the environments best suited for an application without having to factor in the underlying hardware environment. Units of this infrastructure, including compute, storage, and networks, collectively form a cloud infrastructure.
This document describes a reference architecture that brings together core products and technologies from Cisco, NetApp, EMC, BMC, and VMware to deliver a comprehensive end-to-end cloud solution. Focused on IaaS cloud deployment, the Cisco VMDC solution provides customers with robust, scalable, and resilient options for cloud data center deployments.
This Cisco driven end-to-end architecture defines how to provision flexible, dynamic pools of virtualized resources that can be shared efficiently and securely among different tenants. Process automation greatly reduces resource provisioning and time to market (TTM) for IaaS-based services. Shared resource pools consist of virtualized Cisco unified compute and virtualized SAN and NAS storage platforms connected using Cisco data center switches and routers.
This solution addresses the following problems:
•Inefficient Resource Utilization—Traditionally, Enterprises design their data centers using dedicated resource silos. These silos include access switches, server racks, and storage pools assigned to specific applications and business units. This approach results in inefficient resource use, where resource pools are customized per application, resulting in fewer shared resources. This design cannot harness unused or idle resources, is complex to administer, and is difficult to scale, which results in longer deployment times. For the public cloud Service Provider, inefficient resource utilization translates to higher capital expense and operating expense and decreases revenue margins.
•Security Guarantees—In a multi-tenant environment, access to resources must be controlled to ensure isolation and security among users. This becomes more challenging when resources are shared. Tenants need to be assured that in new highly virtualized systems their data and applications are secure.
•Resource Provisioning and TTM—Facility consolidation coupled with increased deployment of virtualized servers results in larger, very dense data center systems. Manual provisioning often takes two to four weeks or longer. In many cases, this lengthy duration fails to meet business agility and time to market (TTM) requirements of Enterprises and Service Providers.
•Complex and Expensive Administration—Network, server, security, and application administrators must collaborate to bring up new resources for each new or expanding tenant. Collaboration based on manual methods no longer scales in these new highly virtualized systems, resulting in slow responses to business needs due to complex IT operations. It is complicated and time consuming to streamline manual configuration and resource provisioning tasks. It also increases capital and operating expenditures and overhead caused by resource churn.
As Enterprise IT departments evolve, they are looking for a data center solution that is efficiently shared, secured, and rapidly provisioned. Similarly, Service Providers are looking for solutions that enable them to reduce TTM for new revenue-generating services and reduce ongoing operating expense (OpEx). The VMDC infrastructure design provides a model for flexible sharing of common infrastructure, maintaining secure separation of tenant data and enabling per-tenant differentiated services. The VMDC Orchestration Design Section details how to rapidly provision these shared pools.
This document is intended for, but not limited to, system architects, network design engineers, systems engineers, field consultants, advanced services specialists, and customers who want to understand how to deploy a public or private cloud data center infrastructure.
This design guide assumes that the reader is familiar with the basic concepts of IP protocols, QoS, DiffServ and HA. This guide also assumes that the reader is aware of general system requirements and has knowledge of Enterprise or Service Provider network and Data Center architectures.
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About Cisco Validated Designs
The Cisco Validated Design Program consists of systems and solutions designed, tested, and documented to facilitate faster, more reliable, and more predictable customer deployments. For more information visit http://www.cisco.com/go/validateddesigns.