CN102185928A - Method for creating virtual machine in cloud computing system and cloud computing system - Google Patents

Method for creating virtual machine in cloud computing system and cloud computing system Download PDF

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CN102185928A
CN102185928A CN201110145661XA CN201110145661A CN102185928A CN 102185928 A CN102185928 A CN 102185928A CN 201110145661X A CN201110145661X A CN 201110145661XA CN 201110145661 A CN201110145661 A CN 201110145661A CN 102185928 A CN102185928 A CN 102185928A
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virtual machine
server
user
node
control
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CN201110145661XA
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CN102185928B (en
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吴海玲
邓书芬
纪求华
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广州杰赛科技股份有限公司
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Abstract

The invention relates to the technical field relevant to cloud computing, in particular to a method for creating a virtual machine in a cloud computing system and the cloud computing system, wherein the cloud computing system comprises a cloud control server, at least one node control server and at least one storage server, wherein the storage server is used for storing virtual machine benchmark image files of the virtual machine, user expansion image files and user disk image files; and the method comprises the following steps: the cloud control server receives a user request and forwards the user request to the node control server, wherein the user request comprises the virtual machine benchmark image selected by the user, cpu (central processing unit) and the memory size and the user disk image files; and the node control server receives the user request forwarded by the cloud control server and creates the virtual machine according to the user request. By means of the method for creating the virtual machine in the cloud computing system and the cloud computing system disclosed by the invention, the time cost and bandwidth resources for creating the virtual machine and the use of transport network bandwidth in migration of the virtual machine are reduced, and the problem of loss of user data, caused by system crash of the virtual machine, is avoided.

Description

一种在云计算系统创建虚拟机的方法及云计算系统 A method of creating a virtual machine in the cloud computing system and method for cloud computing system

技术领域 FIELD

[0001] 本发明涉及云计算相关技术领域,特别是一种在云计算系统创建虚拟机的方法及云计算系统。 [0001] The present invention relates to a cloud in the relevant art, particularly to a method for a computing system in a cloud computing system to create a virtual machine and cloud.

背景技术 Background technique

[0002] 云计算是一种网络应用模式,将大量用网络连接的计算资源统一管理和调度,构成一个计算资源池向用户按需服务。 [0002] Cloud computing is a web application mode, calculating the unified management and scheduling resources with the large number of network connections to form a pool of computing resources on-demand service to a user. 云计算提供的服务包括三个方面=IaaS (基础架构即服务)、I^aaS (平台即服务)、MaS (软件即服务)。 Cloud computing services provided include three aspects = IaaS (Infrastructure as a Service), I ^ aaS (Platform as a Service), MaS (software as a service). 虚拟机技术是一种有效管理和充分共享物理资源的重要手段,能够在计算机系统的软、硬件之间引入抽象层,为上层应用提供独立运行环境,且实现硬件资源的共享复用。 Virtual machine technology is an effective management and adequate sharing of physical resources an important means, can be introduced between computer systems software and hardware abstraction layer, providing stand-alone environment for the upper application, and sharing hardware resources reuse. 虚拟机技术作为云计算应用的关键技术,特别是云计算提供的平台即服务和基础架构即服务,必须有虚拟机作基础。 Virtual machine technology as a key technology of cloud computing applications, in particular cloud computing platform as a service and infrastructure as a service, there must be a virtual machine as a basis.

[0003] 现有创建一个虚拟机镜像的过程如下:根据用户需求,创建一个虚拟机镜像,该镜封装了操作系统,应用程序,用户数据盘等软硬件配置,然后将该虚拟机镜像拷贝到目标物理机上运行。 [0003] In the prior image to create a virtual machine is as follows: According to user needs, create a virtual machine image, the mirror encapsulates the operating system, applications, user data disk and other hardware and software configurations, the virtual machine image to copy and then running on the target physical machine.

[0004] 但用户创建虚拟机采用的方法是直接对虚拟机镜像的进行复制,虚拟机镜像文件占用存储空间较大,因此将虚拟机镜像文件传送到目标主机上花费的时间开销和带宽资源较大。 [0004] However, the method used by the user to create a virtual machine directly to a virtual machine image replication, virtual machine image files take up storage space is large, so the virtual machine image file transfer to spend time overhead and bandwidth resources on the target host than Big. 此外用户数据盘是整合在虚拟机镜像中,当虚拟机系统崩溃时,无法保证用户数据的安全性。 In addition it is the integration of user data disk in a virtual machine image, the virtual machine when the system crashes, can not guarantee the security of user data.

发明内容 SUMMARY

[0005] 本发明的第一个发明目的在于提供一种在云计算系统创建虚拟机的方法,以解决现有技术中云计算平台在创建虚拟机时间开销和带宽资源较大,并且无法保障虚拟机中用户信息的安全性。 [0005] A first object of the present invention to provide a method for creating a virtual machine in a cloud computing system to solve the prior art cloud computing platform to create larger virtual machine overhead time and bandwidth resources, and can not guarantee the virtual security machine user information.

[0006] 为了实现本发明的第一个发明目的,采用的技术方案如下: [0006] To achieve the first object of the present invention, a technical solution as follows:

一种在云计算系统创建虚拟机的方法,所述云计算系统包括云控制服务器、至少一个节点控制服务器和至少一个存储服务器,所述存储服务器存储虚拟机基准镜像文件、用户扩展镜像文件和用户磁盘镜像文件,用户扩展镜像文件和用户磁盘镜像文件均是与用户信息相关联,每一个用户都保存有唯一的一个用户扩展镜像文件和用户磁盘镜像文件。 A method of a cloud computing system to create a virtual machine, the cloud computing system includes a control server cloud, at least one node and at least one control server storage server, the storage server stores the reference virtual machine image file, the user and the user image file extension disk image file, image file extension user and user disk image files are associated with the user information, each user has only one user to save the image file extension and user disk image file.

[0007] 所述方法包括: [0007] said method comprising:

云控制器接收用户请求,并向节点控制服务器转发用户请求,所述用户请求包括虚拟机基准镜像,CPU、内存大小以及用户磁盘镜像文件; Cloud controller receives a user request to the control node server forwards the user request, the user request includes a virtual machine reference image, CPU, memory and a user disk image file size;

节点控制服务器接收云控制器转发的用户请求,并根据用户请求创建虚拟机,采用如下步骤: Node control server receives a user request forwarded by cloud controller, and creates a virtual machine according to a user request, the following steps:

(1)根据用户请求获取虚拟机基准镜像文件并保存在节点控制服务器上作为虚拟机基准镜像副本; (1) Get the virtual machine image file reference request according to a user and stored on the server as a virtual machine control node reference mirror copies;

(2)如果存储服务器中没有用户扩展镜像文件,则节点控制服务器根据第一虚拟机基 (2) If the user does not extend the storage server image file, the server node control group according to the first virtual machine

4准镜像副本,在本机上创建用户扩展镜像文件,如果存储服务器中没有用户扩展镜像文件, 则节点控制服务器从服务器中获取用户扩展镜像文件; 4 quasi mirror copy, create user image file extension on the unit, the storage server if no user image file extension, the extension node control server acquires user image file from the server;

(3)节点控制服务器结合虚拟机基准镜像副本和用户扩展镜像生成虚拟机系统文件, 使用虚拟机系统文件、用户磁盘镜像文件和配置信息(cpu、内存、网络等配置)创建虚拟机。 (3) combination node control server virtual machines and users to extend the reference mirror copy image generation virtual file system, file system using the virtual machine, the user disk image files and configuration information (cpu, memory, network configuration, etc.) to create virtual machines.

[0008] 作为一种优选方案,所述步骤(1)具体包括: [0008] As a preferred embodiment, the step (1) comprises:

节点控制服务器判断如果用户请求获取的虚拟机基准镜像文件已经保存在节点控制服务器,且保存在节点控制服务器的虚拟机镜像副本与保存在存储服务器的虚拟机镜像文件一致,则直接执行步骤(2); Node control server determines if the user request a virtual machine reference images already stored in the node control server, and stored in the mirror copy of the virtual node control server coincides with the virtual machine image file stored in a storage server, is directly performed in step (2 );

否则,节点控制服务器从存储服务器下载虚拟机镜像文件,并保存在节点控制服务器上作为虚拟机镜像副本,然后执行步骤(2)。 Otherwise, the node control server to download from the storage server virtual machine image files, and saved on a server node control as a mirror copy of the virtual machine, and then perform step (2).

[0009] 作为进一步的优选方案,节点控制服务器从存储服务器下载虚拟机镜像时,首先判断节点控制服务器用于存储虚拟机镜像副本的存储空间是否已满,若否,直接将虚拟机基准镜像拷贝到节点控制服务器中作为虚拟机镜像副本;若是,则删除节点控制服务器上最近最少使用的虚拟机镜像副本,然后从存储服务器下载虚拟机基准镜像文件存储到节点控制服务器作为虚拟机镜像副本。 [0009] As a further preferred embodiment, the storage server node when the control server to download a virtual machine image from the first node determines whether the control server for storing virtual machine mirror copy storage space is full, if not, the virtual machine directly to the reference image copies to the control server node as a mirror copy of a virtual machine; if so, remove the mirror copy of a virtual machine on a least recently used node control server, then storage from the storage server to download the image file to a virtual machine baseline control node server as a mirror copy of the virtual machine.

[0010] 作为一种优选方案,在虚拟机运行结束后,将虚拟机系统文件与虚拟机基准镜像副本之间的数据差异作为用户扩展镜像,且该用户扩展镜像是保存在存储服务器上。 [0010] As a preferred embodiment, after the virtual machine is running, the difference data between the file system and the virtual machine image as a reference copy of the virtual machine users to extend the mirror and the mirror is extended user stored on the storage server.

[0011] 作为一种优选方案,云控制器根据接收到的用户请求以及预设的选择策略,指定待创建虚拟机的节点控制服务器。 [0011] As a preferred embodiment, the cloud controller according to a user request received and a preset selection policy, the control server specifies the node to be created virtual machine.

[0012] 作为进一步的优选方案,所述预设的选择策略为当前所有节点控制服务器资源利用率最低优先策略,即根据用户请求信息中指定的所需CPU和内存大小,选择当前资源利用率最低且资源满足用户所需CPU和内存大小的节点服务器为待创建虚拟机的节点控制服务器。 [0012] As a further preferred embodiment, the predetermined selection policy nodes for the current lowest priority of all resource utilization policy control server, i.e. the user requests information specified in the CPU and memory size required to select the lowest current resource utilization and the resources needed to meet user node server CPU and memory size of the virtual machine server to create the control node is pending.

[0013] 作为一种优选方案,所述方法还包括: [0013] As a preferred embodiment, the method further comprising:

当虚拟机从第一节点控制服务器迁移到第二节点控制服务器时,如果第二节点控制服务器上存在与第一节点控制服务器相同的虚拟机镜像副本,则仅需关闭需迁移的虚拟机, 然后用第二节点控制服务器上的虚拟机镜像副本和存储服务器上的用户扩展镜像生成虚拟机系统文件,结合用户磁盘镜像文件和配置信息在第二节点控制服务器上启动该虚拟机,否则从第一节点控制服务器复制虚拟机镜像副本到第二节点控制服务器。 When a virtual machine is migrated from the first node to the second node control server control server, and if the same control server node mirrored copy of a virtual machine on the server node control, it is only required to close the migrated virtual machine, then generating a virtual image extended file system on a virtual machine image user copy and the storage server at the second node control server, with the user disk image files and configuration information on the virtual machine to the second node control server, or from the first node control server replication mirror copy of a virtual machine to a second node control server.

[0014] 本发明的第二个发明目的,在于提供一种云计算系统,以实现本发明第一个发明目的所提供的在云计算系统创建虚拟机的方法。 [0014] A second object of the present invention is to provide a cloud computing system, in order to achieve the first object of the invention is the cloud computing system of the present invention is provided a method of creating a virtual machine.

[0015] 为了实现本发明的第二个发明目的,采用的技术方案如下: [0015] To achieve the second object of the present invention, a technical solution as follows:

一种云计算系统,所述云计算系统包括云控制服务器、至少一节点控制服务器和至少一个存储服务器,所述存储服务器存储虚拟机基准镜像文件、用户扩展镜像文件和用户磁盘镜像文件; One kind of cloud computing system, a cloud computing system includes a control server cloud, at least one server and at least one control node storage server, the storage server stores the reference virtual machine image file, the user image file extension and user disk image file;

所述云控制器上设有用于接收包括所需CPU和内存大小的用户请求,并向节点控制服务器转发用户请求的用户请求模块; Cloud controller is provided for receiving the user request comprises a CPU and a required memory size to the control node server forwards the request to the user requesting the user module;

所述节点控制服务器上设有虚拟机创建模块: Create a virtual machine is provided with a control module on the server node:

所述虚拟机创建模块接收云控制器转发的用户请求,并根据用户请求创建虚拟机,包括如下子模块: The virtual machine module receives a request to create a cloud the user forwarded by the controller, and creates a virtual machine according to a user request, comprising the following sub-modules:

虚拟机基准镜像副本获取子模块,用于获取虚拟机基准镜像文件并保存在节点控制服务器上作为虚拟机基准镜像副本; Reference mirror copy of the virtual machine obtaining sub-module, configured to obtain the reference virtual machine image file and stored on the server as a virtual machine control node reference mirror copies;

用户文件获取子模块,用于从存储服务器获取用户扩展镜像文件,节点控制服务器从存储服务器获取用户磁盘镜像文件; User file obtaining sub-module, configured to obtain user image file extension from the storage server, the user node acquires the control server disk image file from the storage server;

虚拟机生成子模块,用于结合虚拟机基准镜像副本和用户扩展镜像生成虚拟机系统文件,使用虚拟机系统文件、用户磁盘镜像文件和配置信息创建虚拟机。 Virtual machine generation sub-module, used in conjunction with a virtual machine baseline mirror copy image creation and expansion of the user virtual machine file system, file system using the virtual machine, the user disk image files and configuration information to create a virtual machine.

[0016] 作为一种优选方案,虚拟机基准镜像副本获取子模块判断如果用户请求获取的虚拟机基准镜像文件没有保存在节点控制服务器,或者保存在节点控制服务器的虚拟机镜像副本与保存在存储服务器的虚拟机镜像文件不一致,则从存储服务器下载虚拟机镜像,并保存在节点控制服务器上作为虚拟机镜像副本。 [0016] As a preferred embodiment, the reference mirror copy of the virtual machine obtaining sub-module determines if the user request to obtain the reference virtual machine image file is not stored in the control server node, or a node stored in the mirror copy of the virtual machines and the control server stored in the memory server virtual machine image file is inconsistent, from the storage server virtual machine image downloaded and saved on the server node control as a mirror copy of the virtual machine.

[0017] 作为一种优选方案,所述节点服务器上还设有扩展镜像维护模块,用于在虚拟机运行结束后,将虚拟机系统文件与虚拟机基准镜像副本之间的数据差异保存在用户扩展镜像,该扩展镜像保存在存储服务器上。 [0017] As a preferred embodiment, the server node also maintains a mirror extension is provided with means for running the virtual machine after the virtual machine data of the difference between the file system and the mirrored copy of the virtual machine stored in the user reference image expansion, the expanded image stored on the storage server.

[0018] 本发明减少创建虚拟机时间开销和带宽资源,降低虚拟机迁移过程传送网络带宽的使用,避免虚拟机系统崩溃导致的用户数据丢失问题。 [0018] The present invention reduces the time to create a virtual machine overhead and bandwidth resources, reduce the use of virtual machine migration process transmission network bandwidth, to avoid virtual machine crashes due to user data loss problem.

附图说明 BRIEF DESCRIPTION

[0019] 图1为存储服务器和节点控制服务器目录结构; 图2为创建虚拟机流程图。 [0019] FIG. 1 as a storage server and a control node server directory structure; FIG. 2 is a flowchart showing a virtual machine created.

具体实施方式 Detailed ways

[0020] 下面结合附图和具体实施例对本发明做进一步详细的说明。 [0020] conjunction with the accompanying drawings and the following specific examples further illustrate the present invention in detail.

[0021] 本实施例为云计算系统中创建虚拟机的方法,云计算系统包括: 云计算平台部署结构包含以下部分: [0021] The present embodiment is a method of creating a virtual machine system of the cloud, the cloud computing system comprising: a cloud computing platform deployment structure contains the following sections:

Web服务器,用于接收前端用户发送的创建虚拟机操作请求。 Web server, a request for creating a virtual operating receiver front-end user transmitted.

[0022] 云控制服务器,用于接收web服务器转发的用户请求,根据预设的选择策略指定节点控制器,并向选定的节点控制服务器转发用户请求。 [0022] Cloud control server for receiving a user request forwarded by the web server, according to a preset policy specifies selecting the node controller, and forwards the user request to the selected server node control.

[0023] 节点控制服务器,用于接收云控制发送的请求,并执行相应的虚拟机操作。 [0023] node control server for receiving a control request sent by the cloud, and performs a corresponding operation of the virtual machine.

[0024] 存储服务器,包含存储设备以及网络文件系统服务器,用于存储虚拟机镜像文件、 扩展镜像文件、用户磁盘镜像文件以及向节点控制服务器提供共享文件目录挂载点。 [0024] The storage server, comprising a storage device and a network file system server, for storing a virtual machine image file, image file extension, the user disk image file and providing the shared file directory mount point the control server node.

[0025] 存储服务器文件目录结构和节点控制服务器文件目录结构如图1所示。 [0025] Storage server node control file directory structure and file server directory structure shown in Fig. 存储服务器文件目录结构包含虚拟机基准镜像存储模块、扩展镜像存储模块和磁盘镜像存储模块, 这三个模块都是共享文件。 Storage Server virtual machine file directory structure contains a reference image storage modules, memory modules and expansion mirrored disk image storage module, three modules are shared files. 节点控制服务器文件目录结构如图1所示,包括本地目录和共享目录,本地目录包括本地镜像存储模块,共享目录则是通过建立挂载点,将虚拟机基准镜像存储模块、扩展镜像存储模块和磁盘镜像存储模块挂载到共享目录下。 Node control server file directory structure shown in Figure 1, comprises a local directory and a shared directory, the local directory includes a local mirror storage module, through the establishment of the shared directory mount point, the virtual machine module reference image memory, image expansion memory module and disk mirroring memory module mount a shared directory.

[0026] 虚拟机创建方法,其流程图如图2所示: [0026] The method of creating the virtual machine, the flow chart shown in Figure 2:

1 :接收用户请求,用户请求指按照用户所选择的配置信息创建虚拟机。 1: receiving a user request, the user request according to the process of creating a virtual machine configuration information selected by the user.

[0027] 配置信息包括虚拟机基准镜像,cpu、内存大小以及用户磁盘镜像文件;虚拟机基准镜像为创建虚拟机的父本,只封装了操作系统以及所需软件,没有个人数据盘,即虚拟机基准镜像只有系统盘C盘。 [0027] configuration information including a virtual machine baseline image, cpu, memory size, and user disk image file; create a virtual machine baseline image as male parent virtual machine, only encapsulates the operating system and software required, no personal data disk, or virtual only the reference mirror unit C disk. 用户磁盘镜像文件是用户的个人数据盘,用于存储用户在使用虚拟机时所需保存的数据信息,类似一般系统中的D盘。 User disk image file is the user's personal data disk, for storing user when using the virtual machine required to save data information, similar to the general system of the disc D. 云控制平台在新建一个用户时会给该用户分配个人数据盘。 Cloud platform will give the user control the distribution of personal data in the disk to create a new user. 虚拟机基准镜像、用户扩展镜像和用户磁盘镜像文件均保存在存储设备,通过NFS服务器将这三个文件所在目录设置为共享目录,使得节点控制服务器可以挂载访问。 Virtual Machine reference image, the user expand a mirrored disk image file and the user are stored in the storage device, where these three files through NFS server directory to a shared directory, so that the node can mount the access control server.

[0028] 2:根据接收到的用户请求以及预设的选择策略,指定待创建虚拟机的节点控制服务器。 [0028] 2: according to a user request received and a preset selection policy, the control server specifies the node to be created virtual machine.

[0029] 预设的选择策略为当前所有节点控制服务器资源利用率最低优先策略,即根据用户请求信息中的CPU和内存大小,选择当前资源利用率最低的节点服务器为待创建虚拟机的宿主物理机(即节点控制服务器)。 [0029] pre-selection strategies for the control of all the current node server resource utilization lowest priority strategy, that is based on user requests information CPU and memory size, select the current resource utilization of the lowest node server to create a virtual machine to physical host to be machine (i.e. control node server).

[0030] 3:根据预设的判定策略,将用户所选的虚拟机基准镜像传送到指定的节点控制服务器。 [0030] 3: according to a preset policy determination, the virtual machine will be selected by the user to the image transfer reference the control server node specified.

[0031] 根据步骤1选择的虚拟机基准镜像,判断虚拟机基准镜像是否在待创建虚拟机的节点控制服务器上的本地镜像目录已有备份,若不存在,执行步骤3 (A),若存在,继续判断本地镜像与虚拟机基准镜像是否一致,若不一致,执行3 (B)0若一致,直接跳到步骤4。 [0031] Step 1 according to the reference image selected virtual machine, the virtual machine determines whether or not a reference image to be created in the directory on the local mirror server node controlling the virtual machine has been backed up, if not, step 3 (A), if present , continue to determine whether the local reference mirror image consistent with the virtual machine, if not, performs 3 (B) 0 if they are consistent, skip to step 4.

[0032] 3(A):判断节点控制服务器镜像存储空间是否已满,若否,直接将虚拟机基准镜像拷贝到节点控制服务器中镜像目录。 [0032] 3 (A): the control node determines whether the server image memory is full, if not directly reference the virtual machine image file to the server node control image directory. 若是,则采用最近最少使用的选择策略删除本地镜像目录最近最少使用的虚拟机镜像,然后将虚拟机基准镜像存储到本地镜像目录。 If so, then the selection strategy of the least recently used virtual machine images to delete the least recently used local mirror directory, and then store the virtual machine to a local reference mirror image directory.

[0033] 3 (B):用虚拟机基准镜像覆盖本地同名镜像。 [0033] 3 (B): a virtual machine with the same name as a local reference mirror image cover.

[0034] 本地镜像与虚拟机基准镜像一致性是指节点控制服务器的本地镜像是虚拟机基准镜像的最新版本,管理员由于用户需求对虚拟机基准镜像进行修改,会导致两种镜像不一致。 [0034] a local mirror of the reference image and the virtual machine node control server consistency refers to a local mirror of the virtual machine is the latest version of the reference image, the administrator because the user needs to modify a virtual machine baseline image, it can lead to inconsistencies two kinds of images. 可采用以下方法判断本地镜像与虚拟机基准镜像的一致性: Can use the following method of determining a local mirror of the reference image and the virtual machine consistency:

在虚拟机基准镜像设置标志位,保存该基准镜像与每个节点控制服务器的本地备份镜像的最后修改时间差,只要对比当前两个镜像的最后修改时间差是否与之前保存的一致, 就可判断本地镜像是否为最新版本。 In the virtual machine sets the flag bit reference image, the reference image stored last modified local backup image server control each node a time difference as long as the last modified time difference comparison current mirror whether the two coincide before saving, can be determined a local mirror It is up to date.

[0035] 简单的说,步骤3是将用户选择的虚拟机基准镜像的最新版本拷贝到待创建虚拟机的节点控制服务器。 [0035] In short, step 3 is selected by the user virtual machine benchmark mirrored copy of the latest version of the control node server virtual machines to be created.

[0036] 4 :创建虚拟机在节点控制服务器的本地镜像基础上,建立一个新的用户扩展镜像,本地镜像称为该扩展镜像的“母镜像”。 [0036] 4: Create a virtual machine in the local mirror server node control on the basis of the establishment of a new user expand a mirror, called the extension a local mirror image of the "mother of the mirror." 用户扩展镜像结合母镜像,用户请求的CPU、内存大小,用户磁盘镜像文件以及虚拟机的配置模板,就可以启动用户所请求的虚拟机。 Mirror Mirror combination of user extensions mother, configuration template user requests CPU, memory size, the user disk image files, and virtual machines, you can start the virtual machine requested by the user. 使用虚拟机的过程中,不会对“母镜像”进行任何更改,它只读“母镜像”。 Process using a virtual machine, not on the "mother image" to make any changes, it read only "the mother of the mirror." 用户扩展镜像则保存由于操作产生的与“母镜像”的数据差异,因此扩展镜像占用存储空间很小。 Since the user data is saved image expansion difference "mirror mother" generated by the operation, thus expanding the storage space occupied by a small mirror. 节点控制服务器提供虚拟机的配置模板,配置模板除了CPU、内存大小、时钟、虚拟机启动方式等设置外,还将用户磁盘镜像文件挂载到虚拟机作为个人磁盘。 Node control server to provide virtual machine configuration templates, templates in addition to the settings of CPU, memory size, clock, and other virtual machine start-up mode, the user will mount the disk image file to the virtual machine as an individual disk.

[0037] 用户扩展镜像是在存储服务器上,用户在使用虚拟机时,是直接对存储服务器上的扩展镜像进行写操作。 [0037] The user image is expanded on the storage server, when the user using the virtual machine, directly on the extended image storage server writes.

[0038] 本发明创建的虚拟机是由虚拟机基准镜像在节点控制服务器上的副本(即母镜像)、扩展镜像、用户磁盘镜像文件和配置文件所组成的。 [0038] The present invention creates a virtual machine by the virtual machine is a copy of the reference image (i.e., the parent image) on the control server node, expand a mirror disk image file and the user profile thereof. 母镜像存储在节点控制器服务器, 而用户扩展镜像和用户磁盘镜像文件则是节点控制服务器通过建立挂载点共享存储设备上的数据。 Master image stored in the node controller server, and the user image and user spreading disk image file is data on the shared storage device mount point server by establishing a control node.

[0039] 由于采用母镜像加增量镜像的方式创建用户虚拟机,当一节点控制服务器用同一个虚拟机基准镜像来创建多个用户虚拟机时,节点控制器只需要保存虚拟机基准镜像的一个备份,分别为每个用户创建一个扩展镜像,结合基准镜像、用户磁盘镜像和配置文件来扩展镜像来创建多个用户虚拟机,而不是通过多个虚拟机基准镜像的复制来创建用户虚拟机,由于扩展镜像占用存储空间较小,这样可以减少创建虚拟机时间开销和带宽资源。 [0039] As a result of incrementing mirror image female create user virtual machine, when a control node server using the same virtual machine to create a reference image when a plurality of user virtual machines, the node controller only needs to save the image of the virtual machine reference a backup, each user creates an extended mirror, combined with the reference image, respectively, disk mirroring and user profiles to expand a mirror to create multiple user virtual machine, rather than to create a user virtual machine by copying multiple virtual machines benchmark mirror , due to the expansion memory mirroring occupy less space, thus reducing the time to create a virtual machine overhead and bandwidth resources.

[0040] 用户磁盘镜像文件通过挂载方式作为个人硬盘,可随时卸载。 [0040] user disk image file as a personal hard drive, you can always uninstall by way of mounting. 当用户操作失误导致虚拟机系统崩溃,并不影响用户保存在硬盘的数据,只需为重新用户创建一个虚拟机,通过配置文件将硬盘挂载到新虚拟机即可。 When the user error cause the virtual machine system crash, it does not affect user data stored in the hard disk, simply create a virtual machine for the re-user, through the configuration file will mount the hard disk to a new virtual machine can be. 这样可以有效解决由于系统崩溃而导致的用户数据丢失问题。 This can effectively solve the user data due to system crashes caused by loss problem. 此外,在迁移用户虚拟机过程,若迁移的目标节点控制服务器存在与用户虚拟机的基准镜像一致的母镜像,则只需将扩展镜像与迁移的目标节点控制服务器作为系统文件,然后挂载用户磁盘即可,这样减少虚拟机迁移过程中传送网络带宽的使用。 In the migration process of the virtual machine user, if the destination node migration control server consistent with the presence of the user's virtual machine parent reference mirror image, only the image expansion and migration in the destination node the control system as a file server, the user then mounts disk can be, so reduce virtual machine migration process transmission network bandwidth usage.

Claims (10)

1. 一种在云计算系统创建虚拟机的方法,所述云计算系统包括云控制服务器、至少一个节点控制服务器和至少一个存储服务器,其特征在于,所述存储服务器存储虚拟机基准镜像文件、用户扩展镜像文件和用户磁盘镜像文件,所述方法包括:云控制器接收用户请求,并向节点控制服务器转发用户请求,所述用户请求包括用户选择的虚拟机基准镜像,CPU、内存大小以及用户磁盘镜像文件;节点控制服务器接收云控制器转发的用户请求,并根据用户请求创建虚拟机,采用如下步骤:(1)根据用户请求获取虚拟机基准镜像文件并保存在节点控制服务器上作为第一虚拟机基准镜像副本;(2)如果存储服务器中没有用户扩展镜像文件,则节点控制服务器根据第一虚拟机基准镜像副本,在本机上创建用户扩展镜像文件,如果存储服务器中没有用户扩展镜像文件, 则 1. A method of creating a virtual machine in a cloud computing system, said system comprising a cloud computing cloud control server, the control server at least one node and at least one storage server, wherein, the storage server stores the virtual machine image file reference, user image file extension and user disk image file, the method comprising: receiving a user request to cloud controller, and forwards the request to the user control server node, the user requesting a user selected virtual machine comprising a reference image, CPU, memory size, and the user disk image files; node control server receives a user request forwarded by cloud controller, and creates a virtual machine according to a user request, the following steps: (1) obtaining a reference virtual machine image file requested by the user and stored on the server as a first control node reference mirror copy virtual machine; (2) if the user does not extend the storage server image file, the server controlling node according to a first reference mirror copy virtual machine, create the user image file extension on the unit, if the user does not extend the storage server mirroring file, 节点控制服务器从服务器中获取用户扩展镜像文件;(3)节点控制服务器结合虚拟机基准镜像副本和用户扩展镜像作为虚拟机系统文件, 使用虚拟机系统文件、用户磁盘镜像文件和虚拟机配置文件创建虚拟机。 Node control server acquires from the server the user extended image file; (3) Node control server binding VM reference mirror copy and the user extensions mirror as a virtual machine system file using the virtual machine system file, a user disk image file and the virtual machine configuration file is created virtual machine.
2.根据权利要求1所述的方法,其特征在于,所述步骤(1)具体包括:节点控制服务器判断如果用户请求获取的虚拟机基准镜像文件已经保存在节点控制服务器,且保存在节点控制服务器的虚拟机镜像副本与保存在存储服务器的虚拟机镜像文件一致,则直接执行步骤(2);否则,节点控制服务器从存储服务器下载虚拟机镜像文件,并保存在节点控制服务器上作为虚拟机镜像副本,然后执行步骤(2)。 2. The method according to claim 1, wherein said step (1) comprises: a control node server determines if the user request to obtain the reference virtual machine image file has been saved in the control server node, and stored in the control nodes mirror copy of the server's virtual machine consistent with the virtual machine image file stored in the storage server, perform step (2); otherwise, the node control server from the storage server to download the virtual machine image files, and save on the node control server as a virtual machine mirror copy, and the step (2).
3.根据权利要求2所述的方法,其特征在于,节点控制服务器从存储服务器下载虚拟机镜像时,首先判断节点控制服务器用于存储虚拟机镜像副本的存储空间是否已满,若否, 直接将虚拟机基准镜像拷贝到节点控制服务器中作为虚拟机镜像副本;若是,则删除节点控制服务器上最近最少使用的虚拟机镜像副本,然后从存储服务器下载虚拟机基准镜像文件存储到节点控制服务器作为虚拟机镜像副本。 3. The method according to claim 2, wherein the storage server node when the control server to download a virtual machine image from the first node determines whether the control server for storing virtual machine mirror copy storage space is full, if not, directly the virtual machine base image file to the node control server as a mirror copy of a virtual machine; if so, remove the mirror copy virtual machines least recently used on the node control server, and then as from the storage server to download a virtual machine baseline image file stored in the node control server a mirror copy of the virtual machine.
4.根据权利要求1所述的方法,其特征在于,在虚拟机运行结束后,将虚拟机系统文件与虚拟机基准镜像副本之间的数据差异作为用户扩展镜像,并且把扩展镜像保存在存储服务器上。 4. The method according to claim 1, characterized in that, after the virtual machine is running, the difference data between the file system and the virtual machine image as a reference copy of the virtual machine users to extend the mirror and the image stored in the storage expansion on the server.
5.根据权利要求1所述的方法,其特征在于,云控制器根据接收到的用户请求以及预设的选择策略,指定待创建虚拟机的节点控制服务器。 5. The method according to claim 1, wherein the cloud controller according to a user request received and a preset selection policy, the control server specifies the node of a virtual machine to be created.
6.根据权利要求5所述的方法,其特征在于,所述预设的选择策略为当前所有节点控制服务器资源利用率最低优先策略,即根据用户请求信息中指定的所需CPU和内存大小, 选择当前资源利用率最低且资源满足用户所需CPU和内存大小的节点服务器为待创建虚拟机的节点控制服务器。 6. The method as claimed in claim 5, wherein said predetermined selection policy at the lowest priority of all the nodes of the current control policy server resource utilization, i.e. the information specified in the request CPU and memory size required for the user, select the current resource utilization and resources required to meet the minimum node server CPU and memory sizes to be created for the user control node server virtual machine.
7.根据权利要求1所述的方法,其特征在于,所述方法还包括:当虚拟机从第一节点控制服务器迁移到第二节点控制服务器时,如果第二节点控制服务器上存在与第一节点控制服务器相同的虚拟机镜像副本,则在第一节点服务器关闭虚拟机,第二节点控制服务器采用虚拟机镜像副本和存储服务器上的用户扩展镜像作为虚拟机系统文件,结合用户磁盘镜像文件和配置信息在第二节点控制服务器上启动虚拟机,否则从第一节点控制服务器复制虚拟机镜像副本到第二节点控制服务器,第二节点控制服务器采用从第一节点控制服务器复制的虚拟机镜像副本和存储服务器上的用户扩展镜像作为虚拟机系统文件,结合用户磁盘镜像文件和配置信息在第二节点控制服务器上启动虚拟机。 7. The method according to claim 1, wherein said method further comprises: when a virtual machine is migrated from the first node to the second node control server control server, and if there is a first point on the second control server the same server node control mirror copy virtual machine, the virtual machine server closes the first node, a second control point on the mirror server uses the user extended virtual machine image as a virtual copy of the storage server and the file system, and connection with a user disk image file configuration information for the virtual machine to the second node control server, or copy a mirror copy of the virtual machine server control from the first node to the second node control server, the second node control server using a mirror copy of the virtual machine server replication from the first control point and the image storage server as a virtual extension of the user file system, and disk image file with the user configuration information for the virtual machine to the second node control server.
8. —种云计算系统,其特征在于,所述云计算系统包括云控制服务器、至少一个节点控制服务器和至少一个存储服务器,所述存储服务器存储虚拟机基准镜像文件、用户扩展镜像文件和用户磁盘镜像文件;所述云控制器上设有用于接收包括所需CPU和内存大小的用户请求,并向节点控制服务器转发用户请求的用户请求模块;所述节点控制服务器上设有虚拟机创建模块:所述虚拟机创建模块接收云控制器转发的用户请求,并根据用户请求创建虚拟机,包括如下子模块:虚拟机基准镜像副本获取子模块,用于获取虚拟机基准镜像文件并保存在节点控制服务器上作为虚拟机基准镜像副本;用户文件获取子模块,用于从存储服务器获取用户扩展镜像文件,节点控制服务器从存储服务器获取用户磁盘镜像文件;虚拟机生成子模块,用于结合虚拟机基准镜像副本 8. - kind of a cloud computing system, wherein the cloud computing system includes a control server cloud, at least one node and at least one control server storage server, the storage server stores the reference virtual machine image file, the user and the user image file extension disk image files; provided for receiving a user request including the required size of the CPU and memory controller on the cloud, and forwards the user request to the user requesting the server node control module; VM creation module is provided on the control node server : the virtual machine module receives a request to create a cloud the user forwarded by the controller, and creates a virtual machine according to a user request, comprising the following sub-modules: a reference mirror copy of the virtual machine obtaining sub-module, configured to acquire the virtual machine image file and stored in the reference node as a virtual machine on a reference mirror copy control server; user file obtaining sub-module, configured to obtain user image file extension, the node control server acquires user disk image file from the repository server from the storage server; VM generation sub-module, a virtual machine for binding the reference mirror copy 用户扩展镜像生成虚拟机系统文件,使用虚拟机系统文件、用户磁盘镜像文件和虚拟机配置信息创建虚拟机。 Extended user generated virtual machine image file system, file system using the virtual machine, the user disk image files and virtual machine configuration information to create a virtual machine.
9.根据权利要求8所述的云计算系统,其特征在于,虚拟机基准镜像副本获取子模块判断如果用户请求获取的虚拟机基准镜像文件没有保存在节点控制服务器,或者保存在节点控制服务器的虚拟机镜像副本与保存在存储服务器的虚拟机镜像文件不一致,则从存储服务器下载虚拟机镜像,并保存在节点控制服务器上作为虚拟机镜像副本。 9. A cloud computing system according to claim 8, characterized in that the reference mirror copy of the virtual machine obtaining sub-module determines if the user request to obtain the reference virtual machine image file is not stored in the control server node, or a node stored in the control server a mirror copy of the virtual machine and the virtual machine image file stored in the storage server does not match, from the storage server virtual machine image downloaded and saved on the server node control as a mirror copy of the virtual machine.
10.根据权利要求8所述的云计算系统,其特征在于,所述节点服务器上还设有扩展镜像维护模块,用于在虚拟机运行结束后,将虚拟机系统文件与虚拟机基准镜像副本之间的数据差异作为用户扩展镜像。 10. A cloud computing system according to claim 8, wherein the mirror further has a maintenance extension module for running the virtual machine after the virtual file system with reference mirror copy of the virtual machine server node the difference between the user data as a mirror extension.
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