规模应用中虚拟机的统一标识问题及解决方案探讨

doi:10.3639/j.issn.1000-0810.2011.10.009

Abstract

Yongbing Fan,Tian Chen,Peiyuan Lai. Exploration of Virual Machine Unique Identifier in Telecom Operation Environment[J]. Telecommunications Science, 2011, 27(10): 46-50.

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厂商虚拟机标识的格式	虚拟机标识的管理
VMwareVMware虚拟机在创建时由系统分配VMware-UUID。VMware-UUID是一个128位的二进制数，一般表示为一个16进制数字符串，各个16进制数用空格隔开，并在第8和第9个16进制数之间由连接符“-”连接，如00 11 22 33 44 55 66 77-88 99 aa bb cc dd ee ff	VMware允许在虚拟机关闭时，通过修改虚拟机配置文件的方式对虚拟机的UUID进行重写，重写的UUID在虚拟机重启后生效；当开启一个已经迁移或是复制到新位置的虚拟机时，系统会提示对UUID是否更新进行选择：UUID保持不变、创建一个新的UUID、总是创建新UUID、UUID始终保持不变
Citrix创建Xen虚拟机时由系统统一分配Citrix-UUID，该虚拟机标识是由系统随机产生的一个256位二进制数，是Citrix Xen虚拟机的全球惟一标识，其构成规则是：时间戳+大的随机数	该虚拟机标识的分配和管理与虚拟机状态无关，一旦虚拟机创建，此标识就与被创建的虚拟机相对应，不再变化，直至该虚拟机被删除；具体管理方式：可以通过 Xenserver 的 CLI 或XenCenter GUI进行查询，但不能直接修改和删除，因为该标识是虚拟机的惟一标识
Redhat虚拟机创建时由Linux的系统命令“uuidgen”产生一个随机的、惟一的32位标识，该标识是根据Linux系统的随机数函数产生的32个字符（包括数字和字母）组成的随机数	该虚拟机标识是在虚拟机创建的时候分配的，当对虚拟机进行开启、关闭、迁移等操作时，该标识不会改变；当删除虚拟机时，相对应的虚拟机标识也将不再存在
Microsoft Microsoft 产品中广泛使用的GUID（globally unique identifier）也被用在了虚拟机标识上。GUID 是一个128位二进制数，在虚拟机创建时产生，如E85F830D-755F-4E0C- A1E5-412DF9C3213E	当导入一个Windows Server 2008 R2虚拟机时，可以使用已有的GUID（前提是原先使用该GUID的虚拟机已经删除），也可以使用新产生的GUID
华为在创建虚拟机时，采用一定的算法，根据时间、序号、基本名等因素，计算得到虚拟机标识，该虚拟机标识的具体格式是：10个字母组成的字符串	通过一定的算法确保虚拟机标识在全管理系统范围内惟一；虚拟机标识一旦产生之后，不可更改

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Exploration of Virual Machine Unique Identifier in Telecom Operation Environment

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