CN102185928B - 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 PDFInfo
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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
Technical field
The present invention relates to the cloud computing correlative technology field, particularly a kind of method and cloud computing system of creating virtual machine in cloud computing system.
Background technology
Cloud computing is a kind of network application mode, will use computational resource unified management and the scheduling of network connection in a large number, constitutes a computational resource pond to user's on-demand service.The service that cloud computing provides comprises three aspects: the IaaS(architecture is namely served), the PaaS(platform namely serves), SaaS(software namely serves).Virtual machine technique is a kind of effective management and the important means of fully sharing physical resource, can introduce level of abstraction between soft, the hardware of computer system, for upper layer application provides the independent operating environment, and realizes the shared multiplexing of hardware resource.The platform that virtual machine technique provides as cloud computing key technologies for application, particularly cloud computing is namely served with architecture and is namely served, and must have virtual machine to do the basis.
The process of a virtual machine image of existing establishment is as follows: according to user's request, create a virtual machine image, this mirror has encapsulated operating system, application program, and software and hardware configuration such as user data dish copy this virtual machine image on the target physical machine to then and move.
But it is directly to the copying of virtual machine image that the user creates method that virtual machine adopts, and it is bigger that virtual machine image file takies memory space, and it is bigger therefore virtual machine image file to be sent to the time overhead and the bandwidth resources that spend on the destination host.The user data dish is to be incorporated in the virtual machine image in addition, when dummy machine system collapses, can't guarantee safety of user data.
Summary of the invention
First goal of the invention of the present invention is to provide a kind of method of creating virtual machine in cloud computing system, bigger at establishment virtual machine time overhead and bandwidth resources with cloud computing platform in the solution prior art, and can't ensure safety of user information in the virtual machine.
In order to realize first goal of the invention of the present invention, the technical scheme of employing is as follows:
A kind of method of creating virtual machine in cloud computing system, described cloud computing system comprises cloud Control Server, at least one node control server and at least one storage server, described storage server storage virtual machine benchmark image file, user expand image file and user disk image file, the user expands image file and the user disk image file all is to be associated with user profile, and each user preserves a unique user and expands image file and user disk image file.
Described method comprises:
The cloud Control Server receives user's request, and to node control server forwards user request, described user's request comprises virtual machine reference mirror picture, cpu, memory size and user disk image file;
The node control server receives user's request that the cloud Control Server is transmitted, and asks to create virtual machine according to the user, adopts following steps:
(1) according to user's acquisition request virtual machine benchmark image file and be kept on the node control server as virtual machine benchmark mirror image copies;
(2) if do not have user's extender in the storage server as file, then the node control server is according to the first virtual machine benchmark mirror image copies, create the user at this machine and expand image file, if user's extender is arranged as file in the storage server, then the node control server obtains the user and expands image file from server;
(3) node control server combined with virtual machine benchmark mirror image copies and user's extender picture generate the dummy machine system file, use dummy machine system file, user disk image file and configuration information (configurations such as cpu, internal memory, network) to create virtual machine.
As a kind of preferred version, described step (1) specifically comprises:
If the node control server is judged the virtual machine benchmark image file of user's acquisition request and has been kept at the node control server, and the virtual machine image copy that is kept at the node control server is consistent with the virtual machine image file that is kept at storage server, then direct execution in step (2);
Otherwise the node control server is downloaded virtual machine image file from storage server, and is kept on the node control server as the virtual machine image copy, then execution in step (2).
As further preferred version, when the node control server is downloaded virtual machine image from storage server, at first whether the decision node Control Server is full for the memory space of storage virtual machine mirror image copies, if not, directly the virtual machine reference mirror is looked like to copy in the node control server as the virtual machine image copy; If then least-recently-used virtual machine image copy on the deletion of node Control Server is downloaded virtual machine benchmark image file from storage server then and is stored the node control server into as the virtual machine image copy.
As a kind of preferred version, behind the virtual machine end of run, as user's extender picture, and this user's extender similarly is to be kept on the storage server with the data difference between dummy machine system file and the virtual machine benchmark mirror image copies.
As a kind of preferred version, the cloud Control Server is specified the node control server of virtual machine to be created according to the user's request and the default selection strategy that receive.
As further preferred version, described default selection strategy is the minimum preference strategies of current all node control server resource utilances, namely according to required CPU and the memory size of appointment in the user request information, the node control server of selecting the minimum and resource of current resource utilization to satisfy the required CPU of user and memory size is the node control server of virtual machine to be created.
As a kind of preferred version, described method also comprises:
When virtual machine is moved to the Section Point Control Server from the first node Control Server, if there be the virtual machine image copy identical with the first node Control Server on the Section Point Control Server, then only need close the virtual machine that needs migration, generate the dummy machine system file with the virtual machine image copy on the Section Point Control Server and the user's extender picture on the storage server then, start this virtual machine in conjunction with user disk image file and configuration information at the Section Point Control Server, otherwise copy the virtual machine image copy to the Section Point Control Server from the first node Control Server.
Second goal of the invention of the present invention is to provide a kind of cloud computing system, with the method at cloud computing system establishment virtual machine that realizes that first goal of the invention of the present invention is provided.
In order to realize second goal of the invention of the present invention, the technical scheme of employing is as follows:
A kind of cloud computing system, described cloud computing system comprises cloud Control Server, at least one node control server and at least one storage server, and described storage server storage virtual machine benchmark image file, user expand image file and user disk image file;
Described cloud Control Server is provided with the user's request that comprises required CPU and memory size for reception, and to node control server forwards user requesting users request module;
Described node control server is provided with the virtual machine creating module:
Described virtual machine creating module receives user's request that the cloud Control Server is transmitted, and asks to create virtual machine according to the user, comprises following submodule:
Virtual machine benchmark mirror image copies is obtained submodule, is used for obtaining virtual machine benchmark image file and being kept on the node control server as virtual machine benchmark mirror image copies;
User file obtains submodule, is used for obtaining the user from storage server and expands image file, and the node control server obtains the user disk image file from storage server;
Virtual machine generates submodule, is used for combined with virtual machine benchmark mirror image copies and user's extender picture and generates the dummy machine system file, uses dummy machine system file, user disk image file and configuration information to create virtual machine.
As a kind of preferred version, if obtaining submodule, virtual machine benchmark mirror image copies judges that the virtual machine benchmark image file of user's acquisition request is not kept at the node control server, the virtual machine image copy that perhaps is kept at the node control server is inconsistent with the virtual machine image file that is kept at storage server, then download virtual machine image from storage server, and be kept on the node control server as the virtual machine image copy.
As a kind of preferred version, also be provided with extender as maintenance module on the described node control server, be used for behind the virtual machine end of run, data difference between dummy machine system file and the virtual machine benchmark mirror image copies is kept at user's extender picture, and this extender looks like to be kept on the storage server.
The present invention reduces establishment virtual machine time overhead and bandwidth resources, reduces the use that the virtual machine (vm) migration process transmits the network bandwidth, the user data loss problem of avoiding the dummy machine system collapse to cause.
Description of drawings
Fig. 1 is storage server and node control server directory structure;
Fig. 2 is for creating the virtual machine flow chart.
Embodiment
The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.
Present embodiment is the method for creating virtual machine in the cloud computing system, and cloud computing system comprises:
The cloud computing platform deployment architecture comprises with the lower part:
Web server is used for the establishment virtual machine operations request that the receiving front-end user sends.
The cloud Control Server is used for receiving user's request of web server forwards, according to default selection strategy specified node controller, and to selected node control server forwards user request.
The node control server is used for receiving the request that cloud control sends, and carries out corresponding virtual machine operations.
Storage server comprises memory device and network file system server, is used for storage virtual machine image file, expansion image file, user disk image file and provides shared file catalogue mount point to the node control server.
Storage server document directory structure and node control server file bibliographic structure are as shown in Figure 1.The storage server document directory structure comprise the virtual machine reference mirror as memory module, extender as memory module and disk mirroring memory module, these three modules all are shared files.Node control server file bibliographic structure as shown in Figure 1, comprise local directory and share directory, local directory comprises local mirrored storage module, share directory then is by setting up mount point, the virtual machine reference mirror being mounted under the share directory as memory module and disk mirroring memory module as memory module, extender.
Virtual machine creating method, its flow chart be as shown in Figure 2:
1: receive user's request, user's request refers to create virtual machine according to user-selected configuration information.
Configuration information comprises virtual machine reference mirror picture, cpu, memory size and user disk image file; Virtual machine reference mirror picture has only encapsulated operating system and required software for creating the male parent of virtual machine, does not have the personal data dish, and namely the virtual machine reference mirror looks like to have only system disk C dish.The user disk image file is user's personal data dish, is used for the data message of storage user required preservation when using virtual machine, the D dish in the similar General System.Cloud control platform distributes the personal data dish for this user at a newly-built user Shi Hui.Virtual machine reference mirror picture, user's extender picture and user disk image file all are kept at memory device, are set to share directory by these three file place catalogues of nfs server, make that the node control server can the carry visit.
2: according to the user's request and the default selection strategy that receive, specify the node control server of virtual machine to be created.
Default selection strategy is the minimum preference strategies of current all node control server resource utilances, namely according to the cpu in the user request information and memory size, selecting the minimum node control server of current resource utilization is host's physical machine (being the node control server) of virtual machine to be created.
3: according to default decision plan, user-selected virtual machine reference mirror is looked like to be sent to the node control server of appointment.
Virtual machine reference mirror picture according to step 1 selection, judge that the virtual machine reference mirror similarly is the not existing backup of the local mirror image catalogue on the node control server of virtual machine to be created, if do not exist, execution in step 3(A), if exist, continue to judge that local mirror image and virtual machine reference mirror similarly are not consistent, if inconsistent, carry out 3(B).If consistent, leap to step 4.
3 (A): whether decision node Control Server mirrored storage space is full, if not, directly the virtual machine reference mirror looked like to copy to mirror image catalogue in the node control server.If, then adopt least-recently-used selection strategy to delete the least-recently-used virtual machine image of local mirror image catalogue, then the virtual machine reference mirror is looked like to store into local mirror image catalogue.
3 (B): look like to cover local mirror image of the same name with the virtual machine reference mirror.
Local mirror image and virtual machine reference mirror refer to that as consistency the local mirror image of node control server is the latest edition of virtual machine reference mirror picture, and the keeper can cause two kinds of mirror images inconsistent because user's request looks like to make amendment to the virtual machine reference mirror.Can adopt following method to judge the consistency of local mirror image and virtual machine reference mirror picture:
Look like to arrange flag bit in the virtual machine reference mirror, the last modification time of local backup mirror image of preserving this reference mirror picture and each node control server is poor, as long as the last modification time difference of current two mirror images of contrast whether with preserve before consistent, just can judge whether local mirror image is latest edition.
Briefly, step 3 is node control servers that the latest edition of virtual machine reference mirror picture that the user is selected copies virtual machine to be created to.
4: create virtual machine
On the local mirror image basis of node control server, set up new user's extender picture, local mirror image is called " female mirror image " of this extender picture.User's extender picture is in conjunction with female mirror image, cpu, the memory size of user's request, and the configuration template of user disk image file and virtual machine just can start the virtual machine that the user asks.Use in the process of virtual machine, can not carry out any change to " female mirror image ", its read-only " female mirror image ".User's extender picture then preserve since operation that produce with data difference " female mirror image ", so extender to look like to take memory space very little.The node control server provides the configuration template of virtual machine, and configuration template also is mounted to virtual machine as personal disk with the user disk image file except cpu, memory size, clock, virtual machine activation mode etc. arrange.
User's extender similarly is on storage server, and the user is directly the extender on the storage server to be looked like to carry out write operation when using virtual machine.
The virtual machine that the present invention creates is made up of copy (being female mirror image), extender picture, user disk image file and the configuration file of virtual machine reference mirror picture on the node control server.Female mirrored storage is at the Node Controller server, and user's extender picture and user disk image file then are that the node control server is by setting up the data on the mount point shared storage device.
Because the mode that adopts female mirror image to add the increment mirror image is created user virtual machine, when a node control server looks like to create a plurality of user virtual machine with same virtual machine reference mirror, Node Controller only need be preserved a backup of virtual machine reference mirror picture, be respectively each user and create an extender picture, in conjunction with the reference mirror picture, user disk mirror image and configuration file come extender to look like to create a plurality of user virtual machine, rather than copy to create user virtual machine by a plurality of virtual machine reference mirror pictures, because it is less that extender looks like to take memory space, can reduce like this and create virtual machine time overhead and bandwidth resources.
The user disk image file, can unload as individual hard disk at any time by the carry mode.When user's operate miss causes the dummy machine system collapse, do not influence the data that the user is kept at hard disk, only be required to be again the user and create a virtual machine, by configuration file hard disk is mounted to new virtual machine and gets final product.Can effectively solve the user data loss problem that causes owing to system crash like this.In addition, at the migrated users virtual machine process, if there be the female mirror image consistent with the reference mirror picture of user virtual machine in the destination node Control Server of migration, then only need destination node Control Server with extender picture and migration as system file, the carry user disk gets final product then, reduces the use that transmits the network bandwidth in the virtual machine (vm) migration process like this.
Claims (10)
1. method of creating virtual machine in cloud computing system, described cloud computing system comprises cloud Control Server, at least one node control server and at least one storage server, it is characterized in that, described storage server storage virtual machine benchmark image file, user expand image file and user disk image file, and described method comprises:
The cloud Control Server receives user's request, and to node control server forwards user request, described user's request comprises the virtual machine reference mirror picture that the user selects, CPU, memory size and user disk image file;
The node control server receives user's request that the cloud Control Server is transmitted, and asks to create virtual machine according to the user, adopts following steps:
(1) according to user's acquisition request virtual machine benchmark image file and be kept on the node control server as the first virtual machine benchmark mirror image copies;
(2) if do not have user's extender in the storage server as file, then the node control server is according to the first virtual machine benchmark mirror image copies, create the user at this machine and expand image file, if user's extender is arranged as file in the storage server, then the node control server obtains the user and expands image file from server;
(3) node control server combined with virtual machine benchmark mirror image copies and user's extender picture use dummy machine system file, user disk image file and virtual machine configuration to create virtual machine as the dummy machine system file.
2. method according to claim 1 is characterized in that, described step (1) specifically comprises:
If the node control server is judged the virtual machine benchmark image file of user's acquisition request and has been kept at the node control server, and the virtual machine image copy that is kept at the node control server is consistent with the virtual machine image file that is kept at storage server, then direct execution in step (2);
Otherwise the node control server is downloaded virtual machine image file from storage server, and is kept on the node control server as the virtual machine image copy, then execution in step (2).
3. method according to claim 2, it is characterized in that, when the node control server is downloaded virtual machine image from storage server, at first whether the decision node Control Server is full for the memory space of storage virtual machine mirror image copies, if not, directly the virtual machine reference mirror is looked like to copy in the node control server as the virtual machine image copy; If then least-recently-used virtual machine image copy on the deletion of node Control Server is downloaded virtual machine benchmark image file from storage server then and is stored the node control server into as the virtual machine image copy.
4. method according to claim 1 is characterized in that, behind the virtual machine end of run, the data difference between dummy machine system file and the virtual machine benchmark mirror image copies as user's extender picture, and is looked like extender to be kept on the storage server.
5. method according to claim 1 is characterized in that, the cloud Control Server is specified the node control server of virtual machine to be created according to the user's request and the default selection strategy that receive.
6. method according to claim 5, it is characterized in that, described default selection strategy is the minimum preference strategies of current all node control server resource utilances, namely according to required CPU and the memory size of appointment in the user request information, the node control server of selecting the minimum and resource of current resource utilization to satisfy the required CPU of user and memory size is the node control server of virtual machine to be created.
7. method according to claim 1 is characterized in that, described method also comprises:
When virtual machine is moved to the Section Point Control Server from the first node Control Server, if there be the virtual machine image copy identical with the first node Control Server on the Section Point Control Server, then close virtual machine at the first node Control Server, user's extender picture on Section Point Control Server employing virtual machine image copy and the storage server is as the dummy machine system file, start virtual machine in conjunction with user disk image file and configuration information at the Section Point Control Server, otherwise copy the virtual machine image copy to the Section Point Control Server from the first node Control Server, the Section Point Control Server adopts the virtual machine image copy that copies from the first node Control Server and the user's extender picture on the storage server as the dummy machine system file, starts virtual machine in conjunction with user disk image file and configuration information at the Section Point Control Server.
8. cloud computing system, it is characterized in that, described cloud computing system comprises cloud Control Server, at least one node control server and at least one storage server, and described storage server storage virtual machine benchmark image file, user expand image file and user disk image file;
Described cloud Control Server is provided with the user's request that comprises required CPU and memory size for reception, and to node control server forwards user requesting users request module;
Described node control server is provided with the virtual machine creating module:
Described virtual machine creating module receives user's request that the cloud Control Server is transmitted, and asks to create virtual machine according to the user, comprises following submodule:
Virtual machine benchmark mirror image copies is obtained submodule, is used for obtaining virtual machine benchmark image file and being kept on the node control server as virtual machine benchmark mirror image copies;
User file obtains submodule, is used for obtaining the user from storage server and expands image file, and the node control server obtains the user disk image file from storage server;
Virtual machine generates submodule, is used for combined with virtual machine benchmark mirror image copies and user's extender picture and generates the dummy machine system file, uses dummy machine system file, user disk image file and virtual machine configuration information to create virtual machine.
9. cloud computing system according to claim 8, it is characterized in that, if obtaining submodule, virtual machine benchmark mirror image copies judges that the virtual machine benchmark image file of user's acquisition request is not kept at the node control server, the virtual machine image copy that perhaps is kept at the node control server is inconsistent with the virtual machine image file that is kept at storage server, then download virtual machine image from storage server, and be kept on the node control server as the virtual machine image copy.
10. cloud computing system according to claim 8, it is characterized in that, also be provided with extender as maintenance module on the described node control server, be used for behind the virtual machine end of run, with the data difference between dummy machine system file and the virtual machine benchmark mirror image copies as user's extender picture.
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|---|---|---|---|---|
| WO2010099407A1 (en) * | 2009-02-27 | 2010-09-02 | Broadcom Corporation | Method and system for virtual machine networking |
| CN102033755A (en) * | 2009-09-30 | 2011-04-27 | 国际商业机器公司 | Method and system for running virtual machine mirror image |
| CN101976317B (en) * | 2010-11-05 | 2012-12-05 | 北京世纪互联宽带数据中心有限公司 | Virtual machine image safety method in private cloud computing application |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103458055A (en) * | 2013-09-22 | 2013-12-18 | 广州中国科学院软件应用技术研究所 | Clout competing platform |
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