Johnny的鱼塘

Docker 容器与容器云（第2版）Docker 容器与容器云（第2版）Docker 容器与容器云（第2版）Docker 容器与容器云（第2版）Docker 容器与容器云（第2版）

近年来，容器技术及相关应用得到了国内外越来越多的关注度，研发和应用推广发展势头迅猛。在国外，容器技术已经形成了较成熟的生态圈；在国内，金融企业、互联网企业、IT企业积极投入容器技术研发和应用推广，发展势头迅猛。为了积极引导我国容器技术和应用发展，我们编写本白皮书。

Docker 从2013 年诞生，短短两年时间就在全球IT 技术圈内迅速走红，实乃技术圈内 不可忽视的一阵腿风。然而， Docker 是什么， Docker 带来了什么? Docker 官方如此描述Docker: "Build, Ship, Run. An open platform for distributed applications for developers and sysadmins" 。换言之， Docker 为开发者与系统管理者提供了分布式应用 的开放平台，从而可以便捷地构建、迁移与运行分布式应用。

从内容上讲，本书从一个开发者的角度去理解、分析和｜解决问题： 从基础入门到架构！原理， 从运行机制到开发源码，再从系统运维到应用头’践， ~j:fi伴食面。本书图文并茂，内容丰富，由 浅入深，对基木原理阐述清晰，对程序源码分析透彻，对实践经验体会深刻。

本书既适用于具备基础 Linux 知识的 Docker 初学者，也希望可供理解原理和实现 的高级用户参考。同时，书中给出的实践案例，可供在进行实际部署时借鉴。前六 章为基础内容，供用户理解 Docker 的基本概念和操作；7 ~ 9 章介绍一些高级操 作；第 10 章给出典型的应用场景和实践案例；11 ~ 13 章介绍关于 Docker 实现的 相关细节技术。后续章节则分别介绍一些相关的热门开源项目。

The Kernel-based Virtual Machine, or kvm, is a new Linux subsystem which leverages these virtualization extensions to add a virtual machine monitor (or hypervisor) capability to Linux. Using kvm, one can create and run multiple virtual machines. These virtual machines appear as normal Linux processes and integrate seamlessly with the rest of the system.

Virtualization and emulation are inherently fascinating topics. Why should you need to have multiple computers running multiple operating systems when one computer can run them all? Even better, if you have a sufficiently powerful machine, why limit yourself to running only one operating system at a time? Savvy IBM mainframe users greet virtualization with a yawn and a statement like “That old thing?” Thousands of IBM systems have been running critical business tasks in virtual machines on mainframes for a few decades now. Originally introduced as a mechanism to simultaneously support legacy and more modern operating systems on newer hardware without requiring software changes, virtualization has been a part of enterprise computing since the 1960s. The emergence of powerful, affordable, open source virtualization has taken a long time. As this book illustrates, today’s virtualization technologies have an important place in today’s powerful, 24/7 enterprise computing environments. Virtualization can help you get the most out of your existing hardware; reduce data center costs; help guarantee the seamless availability of critical systems; help support “occasional-use” legacy applications without requiring aging, hard-to-replace hardware; and much, much more.

Consolidation of the multiple traffic types present in current data centers over a single unified network is a big trend in the information technology industry. Extensions to 10G Ethernet are making it the most promising technology for achieving I/O consolidation. The emerging Fibre Channel over Ethernet (FCoE) protocol plays a critical role in this convergence process. This paper elaborates how FCoE leverages the ubiquity and economics of Ethernet networks while preserving the infrastructure, strengths, and tools of the existing Fibre Channel Storage Area Network (SAN) framework.