深入理解Xen Hypervisor：实战指南

需积分: 14 113 浏览量更新于2024-07-26 收藏 2.26MB PDF 举报

"《Xen Hypervisor权威指南》是Prentice Hall出版社开源软件开发系列的一部分，由David Chisnall撰写，出版日期为2008年。该书深入介绍了Xen虚拟机技术，是学习和理解这一关键IT组件的必备参考资料。Xen是一款流行的开源虚拟化解决方案，它允许在单一物理硬件上同时运行多个操作系统（VMs），实现了计算资源的高效利用和隔离。在《The Definitive Guide to the Xen Hypervisor》中，读者可以期待以下几个核心知识点： 1. Xen架构：章节详细解析了Xen的核心设计，包括内核级虚拟化(KVM)和用户级虚拟机管理程序的设计原理，以及它们如何协同工作来创建和管理虚拟机。 2. 虚拟化原理：书中涵盖虚拟机创建、配置、生命周期管理和安全性，让读者理解虚拟机如何在硬件层面上实现隔离，以及如何避免性能瓶颈。 3. 安全与管理：探讨了Xen的安全特性，如内存隔离、安全模式和特权分离，以及如何通过Xen Management Tools进行有效的虚拟机管理和监控。 4. 高级特性：涉及高可用性、动态资源调度、网络虚拟化和存储虚拟化的概念，帮助读者掌握如何在大规模环境中部署和优化Xen。 5. 案例研究与最佳实践：书中分享了实际项目中的应用案例，展示了如何将Xen用于各种场景，如云计算、数据中心优化和嵌入式系统，同时还包含了Open Source社区的最佳编程实践。 6. 与其他技术的集成：讨论了Xen与其他开源技术（如Linux、Kubernetes、Docker等）的整合，帮助读者了解如何构建灵活且可扩展的云基础设施。 7. 实战演练：书中还包含丰富的示例代码和实践操作，让读者在阅读过程中能够动手实践，提升实际操作能力。《The Definitive Guide to the Xen Hypervisor》是一本全面而深入的教程，不仅适合系统管理员、开发人员和技术管理人员，也对任何希望深入了解虚拟化技术的读者具有很高的参考价值。通过阅读这本书，读者不仅能掌握Xen的理论知识，还能学到如何将其应用到实际项目中，提升IT系统的灵活性和效率。"

Foreword

With the recent release of Xen 3.1 the Xen community has delivered the world’s

most advanced hypervisor, which serves as an open source industry standard for

virtualization. The Xen community beneﬁts from the support of over 20 of the

world’s leading IT vendors, contributions from vendors and research groups world-

wide, and is the driving force of innovation in virtualization in the industry.

The continued growth and excellence of Xen is a vindication of the project’s

component strategy. Rather than developing a complete open source product, the

project endorses an integrated approach whereby the Xen hypervisor is included as

the virtualization “engine” in multiple products and projects. For example, Xen

is delivered as an integrated hypervisor with many operating systems, including

Linux, Solaris, and BSD, and is also packaged as virtualizaton platforms such as

XenSource’s XenEnterprise. This allows Xen to serve many diﬀerent use cases

and customer needs for virtualization.

Xen supports a wide range of architectures, from super-computer systems with

thousands of Intel Itanium CPUs, to Power PC and industry standard x86 servers

and clients, and even ARM-9 based PDAs. The project’s cross-architecture, multi-

OS approach to virtualization is another of its key strengths, and has enabled it to

inﬂuence the design of proprietary products, including the forthcoming Microsoft

Windows Hypervisor, and beneﬁt from hardware-assisted virtualization technolo-

gies from CPU, chipset, and fabric vendors. The project also works actively in

the DMTF, to develop industry standard management frameworks for virtualized

systems.

The continued success of the Xen hypervisor depends substantially on the

development of a highly skilled community of developers who can both contribute

to the project and use the technology within their own products. To date, other

than the community’s limited documentation, and a steep learning curve for the

uninitiated, Xen has retained a mystique that is unmistakably “cool” but not

scalable. While there are books explaining how to use Xen in the context of

particular vendors’ products, there is a huge need for a deﬁnitive technical insider’s

guide to the Xen hypervisor itself. Continuing the “engine” analogy, there are

books available for “cars” that integrate Xen, but no manuals on how to ﬁx the

Preface xix

http://www.prenhallprofessional.com/title/9780132349710.

Output from command-line interaction is shown in the following way:

$ gcc hello.c

$ ./a.out

Hello World!

A $ prompt indicates commands that can be run as any user, while a # is used

to indicate that root access is likely to be required.

Use as a Text

In addition to the traditional uses for hypervisors, Xen makes an excellent teaching

tool. Early versions of Xen only supported paravirtualized guests, and newer ones

continue to support these in addition to unmodiﬁed guests. The architecture

exposed by the hypervisor to paravirtualized guests is very similar to x86, but

diﬀers in a number of ways. Driver support is considerably easier, with a single

abstract device being exposed for each device category, for example. In spite of

this, a number of things are very similar. A guest operating system must handle

interrupts (or their virtual equivalent), manage page tables, schedule running

tasks, etc.

This makes Xen an excellent platform for development of new operating sys-

tems. Unlike a number of simple emulated systems, a guest running atop Xen

can achieve performance within 10% that of the native host. The simple device

interfaces make it easy for Xen guests to support devices, without having to worry

about the multitude of peripherals available for real machines.

The similarity to real hardware makes Xen an ideal platform for teaching op-

erating systems concepts. Writing a simple kernel that runs atop Xen is a signiﬁ-

cantly easier task than writing one that runs on real hardware, and signiﬁcantly

more rewarding than writing one that runs in a simpliﬁed machine emulator.

An operating systems course should use this text in addition to a text on

general operating systems principles to provide the platform-speciﬁc knowledge

required for students to implement their own kernels.

Xen is also a good example of a successful, modern, microkernel (although it

does more in kernelspace than many microkernels), making it a good example for

contrasting with popular monolithic systems.

Acknowledgments

First, I have to thank Mark Taub for the opportunity to write this book. Since

ﬁrst contacting Mark in 2002, he has given me the opportunity to work on several

剩余306页未读，继续阅读

goingstudy

粉丝: 8
资源: 4

深入理解Xen Hypervisor：实战指南

Xen Hypervisor完全指南

深入解析Xen Hypervisor技术指南

Xen hypervisor深度解析：开放源代码虚拟化标准

The Definitive Guide to the Xen Hypervisor附带源码

The Definitive Guide to the Xen Hypervisor.pdf

The Definitive Guide to the Xen Hypervisor（David Chisnall）源码下载

Prentice.Hall.The.Definitive.Guide.to.the.Xen.Hypervisor

Xen经典[书+代码]The.Definitive.Guide.to.the.Xen.Hypervisor.Nov.2007

Definitive.Guide.to.the.Xen.Hypervisor.Nov.2007.pdf

Prentice.Hall.The.Definitive.Guide.to.the.Xen.Hypervisor.Nov.2007

最新资源