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在Microsoft Azure上部署XenDesktop7.pdf

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    XenDesktop 7 on Windows Azure Design Guide XenDesktop 7 on Windows Azure citrix.com
    XenDesktop 7 on Windows Azure Design Guide About this design guide The Citrix Design Guide provides an overview of the XenDesktop 7 on Azure solution architecture and implementation. This design has been created through architectural design best practices obtained from Citrix Consulting Services and thorough lab testing, and is intended to provide guidance for solution evaluation and the introduction of proof of concepts. The Design Guide incorporates generally available products into the design, and employs repeatable processes for the deployment, operation, and management of components within the solution. citrix.com
    3 With the introduction of Azure support for Remote Desktop Services Subscriber Access Licenses (RDS SALs) a broad set of opportunities to leverage Azure for hosted Windows desktops and applications begin to unfold. As a platform Microsoft Azure provides a robust, state of the art infrastructure and global presence for enterprises and service providers. Citrix customers wanting to leverage public cloud infrastructure as a service in order to expand their on premise datacenter capabilities, without investing in new capital resources, can now host virtual desktops based on XenDesktop 7 within Azure. This capability enables faster proof of concept and pilot builds for migration to XenDesktop 7 for existing XenDesktop implementations, or as part of a new XenDesktop implementation where the leverage of public cloud infrastructure is preferred. This document provides high level design guidance using a sample implementation of XenDesktop 7 within the Microsoft Windows Azure cloud. Used in conjunction with the XenDesktop Modular Reference Architecture these documents provide basic best practice guidance for companies looking to leverage Citrix and Microsoft cloud technologies to deliver a state of the art solution for their users. Use Case Let’s assume “World-wide Co, Inc.” (WWCo) plans to leverage Microsoft and Citrix products to deliver a hosted desktop solution for their accounting department. The solution will provide value to the department by enabling access to Windows desktops and applications from any device. The value of this solution for World- wide Co. is most evident in the ability to quickly bring new desktop services on line through a subscription to Azure infrastructure services rather than a protracted capital investment and datacenter build out project. Since the new desktops are an extension of the existing World-wide Co datacenter, the infrastructure already in place at World-wide Co. will be connected to Azure through a Site-to-Site VPN. This connectivity enables the Azure hosted XenDesktops to communicate with World-wide Co. corporate Active Directory and Back-office services like Microsoft Exchange or Microsoft Lync, as well as the corporate Secure Remote Access services Enabled through Citrix NetScaler Gateway. The objective of this guide is to outline World-wide Co. business considerations, and how hosting their new XenDesktop 7 workloads in Azure could address them. Business Objectives • Provide secure access to desktops and applications for the accounting team • Avoid the need to build new infrastructure within the WWCo datacenter citrix.com XenDesktop 7 on Windows Azure Design Guide
    4 • Leverage as much existing corporate infrastructure as possible to align with current IT practices and policies and to keep new expenses as low as possible • Use monthly programmatic funding instead of capital expenses for this project • Manage the service within a public cloud environment in order to scale based on seasonal resource requirements • Provide support for any device, enabling temporary contractors to “Bring your own Device” Technical Objectives • Quickly design and implement environment to establish the value and metrics • Ensure high availability of critical components to ensure business continuity • Implement an “n+1” highly available solution to avoid any business interruption • Support access from user-owned devices that vary in form factor and operating system Citrix XenDesktop 7 on Azure World-wide Co. selected XenDesktop as their solution since they enable the best user experience across the public internet from any device according to independent analysis, and after reviewing the Citrix XenDesktop Modular Reference Architecture and Microsoft’s Windows Azure IaaS capabilities, they believed they could build a solution without a large upfront capital investment. The Citrix XenDesktop 7 solution hosted on Azure consisted of a small number of components. Citrix XenDesktop 7 Delivery controllers • Hosted Shared workers (Session Isolation) • and Server VDI Workers (VM/Server Isolation) • An Azure local Active Directory DC that is a member of the World-wide Co. Corporate Forest • An Azure local SQL Server VM Instance • An Azure local File Server for the storage of XenDesktop Roaming User Profiles citrix.com XenDesktop 7 on Windows Azure Design Guide
    5 The remaining components were already in place in the World-wide Co. on premise corporate datacenter. A brief description of key Citrix components follows: • Citrix Receiver – Citrix Receiver is an easy-to-install client software that lets you access your docs, applications and desktops from any of your devices including smartphones, tablets and PCs. • Citrix XenDesktop – Delivery controllers. These XenDesktop 7 Servers are used to manage and deliver dedicated the Windows applications and desktops. • Hosted Shared Workers – These XenDesktop 7 servers are used to deliver shared hosted applications and desktops for most users. • Server VDI Workers – These XenDesktop 7 workloads provide VM or Server level isolation of an individual VDI desktop for those users that require more customization or administrative control of their virtual desktop. • Citrix License Server – The Citrix License Server hosts all of the licenses that enable Citrix products and features. • NetScaler Gateway – NetScaler Gateway is a secure application and data access solution that provides administrators granular application- and data-level control while empowering users with remote access from anywhere. • StoreFront Services – StoreFront Services provides authentication and resource delivery services for Citrix Receiver, enabling you to create centralized enterprise stores to deliver desktops, applications, and other resources to users on any device, anywhere. citrix.com XenDesktop 7 on Windows Azure Design Guide
    6 XenDesktop 7 on Azure Architecture Once World-wide Co. had completed their assessment and concluded that a Citrix XenDesktop 7 solution on Microsoft Azure could meet their objectives, they quickly moved into the design phase. World-wide Co. wanted a simple, easy process to determine the hardware and storage sizing to support their individual implementation based on the needs of their subscribers. World-wide Co. used Citrix Project Accelerator-an open, web-based application where you can manage your move to virtualized desktops and applications based on best practices of Citrix’s top consultants - to assist with the user assessment and environment design. In conjunction with project accelerator guidance, World-wide Co. made the following design decisions: • Although Project Accelerator was currently designed for XenApp 6.5 and XenDesktop 5.6 versions of the Citrix products, World-wide Co. decided that its output could be used as a foundational design to work from in conjunction with their own testing to determine the final requirements when they went to production. • For a robust solution high availability is important, so an “N+1” configuration was chosen to ensure that the solution sizing included a spare server to handle user capacity in the event of a failure. • All users would need to connect to Azure over an encrypted connection through a Site-to-Site VPN between Azure and the World-wide Co. corporate network. Secure remote access would be provided by NetScaler Gateways within the corporate network. • Active Directory, DNS/DHCP, and SQL Server would be provisioned in Azure to reduce login times for this solution. • A variety of financial applications, as well as MS Office would be made available as part of the standard desktop image for this group of users. The following architecture is a visual representation of the solution as recommended by Citrix Project Accelerator. Additional considerations that leverage this output as the base are documented later in this guide. The following diagram represents World-wide Co.’s projected hardware, and infrastructure requirements based on a team of 100 users, spread over the 2 types of users; task workers and content creators. citrix.com XenDesktop 7 on Windows Azure Design Guide
    7 Figure 1: Project Accelerator Output for World-wide Co. XenDesktop 7 on Azure Project Each layer of the architecture diagram is discussed in detail below: citrix.com XenDesktop 7 on Windows Azure Design Guide
    8 User Group The User Group layer represents the subscriber types that will access the Azure hosted desktops from their own end-point devices. Although the graphic represents these devices as “Thin Clients” these devices can be anything from a SmartPhone, Tablet, PC, Mac, or Linux desktop or laptop. These user groups represent the use cases of “Task Worker” or “Content Creator”. The details of what is delivered to these different user groups is enabled within the Desktop layer which address after the Access Layer section below. Figure 2: User Group World-wide Co. requires the following Citrix components on each end-point device: • Citrix Receiver – Citrix Receiver is an universal thin client that runs on virtually any device operating platform, including Windows, Mac®, Linux®, iOS® and Android®. This is the one client users need to access business-critical apps and data from today’s latest tablet and smartphone devices and improve their mobility. Citrix Receiver can be downloaded and installed by each employee on their personal devices. citrix.com XenDesktop 7 on Windows Azure Design Guide
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