CN103118073B - Virtual machine data persistence storage system and method in cloud environment - Google Patents
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Abstract
The invention discloses a virtual machine data persistence storage method in cloud environment. The virtual machine data persistence storage method in the cloud environment comprises the steps: (1) a major node receives a user request from a server and judges whether the user request is a request of block device creation or block device dilatation, if the user request is the request of the block dive creation, the step (2) is conducted, and if the user request is of block device dilatation, the step (5) is conducted, (2) the major node obtains disk information of all storage nodes, selects a storage node according to the user request and informs the storage node to create a block device, (3) the storage node creates and manages a logical volume according to information from the major node, (4) the storage node registers the logical volume into an internet small computer system interface (iSCSI) to enable the logical volume to be provided to and called by the virtual machine as a block device service, and (5) the major node obtains the storage node which the block device is located in according to the user request and calls the storage node to conduct dilatation to the block device. The virtual machine data persistence storage system and method in the cloud environment solve the problem that user data can not be stored persistently after the virtual machine is turned off in an existing cloud computing system.
Description
Technical field
The invention belongs to data store and management field, more specifically, relate to virtual-machine data persistent storage system and method under a kind of cloud environment.
Background technology
Along with proposition and the use of Intel Virtualization Technology, cloud computing technology obtains vigorous growth and applies widely.In virtual machine, data store and management also receives attention and the concern of more and more people.
Virtual by the CPU of physical server, internal memory, storage and network security isolation to improve the utilization rate of resource and to realize the flexible allocation of resource.Physical resource is converted into flexible Virtual base facility by Intel Virtualization Technology by IaaS platform just, provides support to upper layer application, and the user oriented service of providing infrastructures.
The application of Intel Virtualization Technology in cloud computing come also to the data tape in virtual machine new problem and challenge.First under cloud environment, user's data be stored in virtual machine are not persistence, when virtual machine is closed or after unexpected machine of delaying, the data that user is kept in virtual machine will all lose; User's data be stored in virtual machine are limited to the size of virtual machine image, can not meet user to the demand storing dynamic growth; A kind of improvement project uses increment mirror image, but this is unfavorable for the management of data, and the data in increment mirror image may not be required for user entirely; In original solution, data are all closely-coupled with virtual machine, data and virtual machine one_to_one corresponding, user will obtain data must first start the virtual machine of specifying, this coupling is unfavorable for the transmission of data between virtual machine, and large-scale transfer of data will consume a large amount of time, reduces the availability of system.
Summary of the invention
For the defect of prior art, the object of the present invention is to provide the persistent storage method and system of virtual-machine data under a kind of cloud environment, being intended to solve user data in existing cloud computing system can not the problem of persistent storage after virtual machine is closed, and the method data and virtual machine are not closely-coupled, simplify the management of user data.
For achieving the above object, the invention provides the persistent storage method of virtual-machine data under a kind of cloud environment, comprise the following steps:
(1) user's request of host node reception server, and judge that this user request creates block device, or dilatation is carried out to block device, if create block device then jump to step (2), if carry out dilatation to block device then jump to step (5);
(2) obtain the disc information of all memory nodes, according to user's request selecting memory node, and notify that this memory node creates block device;
(3) memory node according to the information creating of host node and management logic volume;
(4) logical volume is registered in iSCSI by memory node, makes this logical volume be supplied to virtual machine call as block device service;
(5) host node is according to the memory node at user's acquisition request block device place, and calls this memory node and carry out dilatation to block device;
(6) service of host node notice virtual machine block device has created complete, and virtual machine provides block device by iSCSI to user.
Step (2) comprises following sub-step:
(2-1) host node obtains the disc information of all memory nodes by Thrift far call framework, comprises disk remaining space information and the disk I/O information of memory node;
(2-2) information that obtains of host node analysis, these memory nodes are sorted according to disk I/O by select disk remaining space to be greater than memory node that user institute applies for space from small to large, and the node selecting disk I/O minimum establishment block device;
(2-3) host node obtains the return information of memory node, and judges that return information instruction creates block device success or failure, if return information instruction creates block device success, then process terminates, if failure, then enters step (2-4);
(2-4) host node unsuccessfully writes daily record by creating and reselects new memory node, then jumps to step (2-2).
Step (4) comprises following sub-step:
(4-1) logical volume created in step (3) adds in iscsi target service by memory node;
(4-2) generate MD5 according to the information of caller, use the password of logical volume as user;
(4-3) username and password of virtual machine access block device service is set;
(4-4) by iSCSI, logical volume is waited for virtual machine call as block device service.
Step (6) comprises following sub-step:
(6-1) host node obtains the information of user's designated virtual machine; Specifically comprise the ip address of virtual machine and the ip address of virtual machine place server;
(6-2) the host node iSCSI promoter program called in virtual machine finds the device service that the memory node in step (4-4) creates;
(6-3) virtual machine signs in in block device according to the user name in step (4-2) and informative abstract.
In step (3), memory node creates the logical volume of being specified size by host node by LVM.
Log-on message in step (4) comprises the path of logical volume, username and password required when virtual machine logs in this service.
In step (5), memory node is by the LVM disk space that additional user specifies in the block device created.
The persistent storage system of virtual-machine data under a kind of cloud environment, comprise user's request processing module, memory node disc information analysis module, memory node establishing logical volume module, iSCSI service register module, block device dilatation module and virtual machine block device carry module, user's request of user's request processing module reception server, and judge that this user request creates block device, or dilatation is carried out to block device, if it is memory node disc information analysis module is called, if carry out dilatation then invoking block equipment dilatation module to block device, memory node disc information analysis module obtains the disc information of all memory nodes, according to user's request selecting memory node, and notify that this memory node creates block device, memory node establishing logical volume module according to the information creating of host node and management logic volume, logical volume is registered in iSCSI by iSCSI service register module, this logical volume is made to be supplied to virtual machine call as block device service, block device dilatation module is according to the memory node at user's acquisition request block device place, and call this memory node dilatation is carried out to block device, the service of virtual machine block device carry module notice virtual machine block device has created complete, virtual machine provides block device by iSCSI to user.
By the above technical scheme that the present invention conceives, compared with prior art, method of the present invention has following beneficial effect:
1, block device can be realized store: owing to have employed step (3), step (4) and step (6), the SCSI instruction set of native system by running at IP layer, the block device of physical machine is mounted in virtual machine, at the new memory space added of user just as virtual machine local device.User can build a file system on equipment, also can use as an original unformatted block device.Compared to the file that the carry by user's space file system (FUSE) just merely provides in systems in which for storing, it is not the block device on practical significance.
2, extensibility is strong: due to have employed step (5) user can when needing the space of extent block equipment.Adopt logical volume to carry out disk management in this process, the expansion in block device space can not have influence on existing data in equipment.Compare and adopt the advantage of the mode of increment mirror image to be, increment mirror image just reaches the effect of Copy on write on using, preserve the data that user writes in magnetic disk of virtual machine, but be finally still limited to the size of virtual machine template mirror image, increment just constantly increases the disk space used on usage behavior, but the disk space that finally can use is fixing, user increases dilatation demand to disk space can not be met.
3, loose coupling: owing to have employed the use decoupling zero of step (3) the present system storage resources of virtual machine, makes to store independent of virtual machine.User can will application block device carry between different virtual machines, storage resources no longer with specific virtual machine one_to_one corresponding, but as one independently system manage.
Accompanying drawing explanation
Fig. 1 is applied environment figure of the present invention.
Fig. 2 is the flow chart of the persistent storage method of virtual-machine data under cloud environment of the present invention.
Fig. 3 is the refinement flow chart of step in the inventive method (2).
Fig. 4 is the refinement flow chart of step in the inventive method (4).
Fig. 5 is the refinement flow chart of step in the inventive method (6).
Fig. 6 is the module frame chart of the persistent storage system of virtual-machine data under cloud environment of the present invention.
Fig. 7 is the refinement block diagram of memory node disc information analysis module in present system.
Fig. 8 is the refinement block diagram of iSCSI service register module in present system.
Fig. 9 is the refinement block diagram of virtual machine block device carry module in present system.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
As shown in Figure 1, the present invention is for the user under virtual machine environment provides memory device.In figure, physical machine has n platform physical machine 1,2 ..., n, wherein physical machine 1 is host node, and physical machine 2 to n is memory node.Host node is responsible for process user request, selects suitable memory node allocation block equipment and manage the flow process of whole request according to the disc information of memory node, and concrete block device operation is completed by Thrift far call.Each memory node provides memory node disc information, and actuating equipment creates, dilatation operation, and is supplied to host node by Thrift far call as service.When user creates equipment to system application time, host node utilizes the memory node information obtained, and selects corresponding node to create or dilatation block device being mounted in virtual machine uses.
As shown in Figure 2, under cloud environment of the present invention, the persistent storage method of virtual-machine data comprises the following steps:
(1) user's request of host node reception server, and judge that this user request creates block device, or dilatation is carried out to block device, if create block device then jump to step (2), if carry out dilatation to block device then jump to step (5);
(2) obtain the disc information of all memory nodes, according to user's request selecting memory node, and notify that this memory node creates block device; Specifically, the information obtaining memory node comprises disk remaining space information and disk I/O information;
(3) memory node according to the information creating of host node and management logic volume; Specifically, memory node creates the logical volume of being specified size by host node by LVM;
(4) logical volume is registered in iSCSI by memory node, makes this logical volume be supplied to virtual machine call as block device service; Specifically, log-on message comprises the path of logical volume, username and password required when virtual machine logs in this service;
(5) host node is according to the memory node at user's acquisition request block device place, and calls this memory node and carry out dilatation to block device;
(6) service of host node notice virtual machine block device has created complete, and virtual machine provides block device by minicomputer system instruction interface (Internet Small Computer System Interface is called for short iSCSI) to user.
Communication between different system adopts the Thrift far call framework of Facebook.
As shown in Figure 3, in the inventive method, step (2) comprises following sub-step:
(2-1) host node obtains the disc information of all memory nodes by Thrift far call framework, comprises disk remaining space information and the disk I/O information of memory node;
(2-2) information that obtains of host node analysis, these memory nodes are sorted according to disk I/O by select disk remaining space to be greater than memory node that user institute applies for space from small to large, and the node selecting disk I/O minimum establishment block device;
(2-3) host node obtains the return information of memory node, and judges that return information instruction creates block device success or failure, if return information instruction creates block device success, then process terminates, if failure, then enters step (2-4);
(2-4) host node unsuccessfully writes daily record by creating and reselects new memory node, then jumps to step (2-2).
As shown in Figure 4, in the inventive method, step (4) comprises following sub-step:
(4-1) logical volume created in step (3) adds in iscsi target service by memory node; Specifically, the log-on message that memory node is supplied to iSCSI comprises the path of logical volume, file type and service name;
(4-2) generate caller informative abstract (Message digest-5 is called for short MD5) according to the information of caller, use the password of logical volume as user;
(4-3) username and password of virtual machine access block device service is set;
(4-4) by iSCSI, logical volume is waited for virtual machine call as block device service.
As shown in Figure 5, in the inventive method, step (6) comprises following sub-step:
(6-1) host node obtains the information of user's designated virtual machine; Specifically comprise the ip address of virtual machine and the ip address of virtual machine place server;
(6-2) the host node iSCSI promoter program called in virtual machine finds the device service that the memory node in step (4-4) creates;
(6-3) virtual machine signs in in block device according to the user name in step (4-2) and informative abstract.
As shown in Figure 6, under cloud environment of the present invention, the persistent storage system of virtual-machine data comprises user's request processing module 1, memory node disc information analysis module 2, memory node establishing logical volume module 3, iSCSI service register module 4, block device dilatation module 5, virtual machine block device carry module 6.
User's request of user's request processing module 1 reception server, and judge that this user request creates block device, or dilatation is carried out to block device, if it is calls memory node disc information analysis module 2, if carry out dilatation then invoking block equipment dilatation module 5 to block device.
Memory node disc information analysis module 2 obtains the disc information of all memory nodes, according to user's request selecting memory node, and notifies that this memory node creates block device.
Memory node establishing logical volume module 3 according to the information creating of host node and management logic volume.
Logical volume is registered in iSCSI by iSCSI service register module 4, makes this logical volume be supplied to virtual machine call as block device service.
Block device dilatation module 5 according to the memory node at user's acquisition request block device place, and is called this memory node and is carried out dilatation to block device.
Virtual machine block device carry module 6 notifies that the service of virtual machine block device has created complete, and virtual machine provides block device by iSCSI to user.
As shown in Figure 7, in present system, memory node disc information analysis module 2 comprises memory node acquisition of information submodule 21, information analysis submodule 22, equipment establishment far call submodule 23, creates failure handling submodule 24.
Memory node acquisition of information submodule 21 obtains the disc information of all memory nodes by Thrift far call framework, comprises disk remaining space information and the disk I/O information of memory node.
The information that information analysis submodule 22 analysis obtains, first select disk remaining space be greater than user apply for the memory node in space, these memory nodes sort according to disk I/O by host node from small to large, and the node selecting disk I/O minimum creates block device.
Equipment creates the return information that far call submodule 23 obtains memory node, and judge that return information instruction creates block device success or failure, if return information instruction creates block device success, then process terminates, if failure, then call and create failure handling submodule 24.
Create the daily record of failure handling submodule 24 register system, and reselect storage child node.
As shown in Figure 8, in present system, iSCSI service register module 4 comprises logical volume registration submodule 41, User Summary generates submodule 42, service password arranges submodule 43, block device service creation submodule 44.
Logical volume is added to iSCSI(minicomputer system instruction interface by logical volume registration submodule 41) in destination service; Specifically, the log-on message that memory node is supplied to iSCSI comprises path, file type and the service name of logical volume.
User Summary generates submodule 42 and generates caller informative abstract (Message digest-5 is called for short MD5) according to the information of caller, uses the password of logical volume as user.
Service password arranges the username and password that submodule 43 arranges virtual machine access block device service.
Logical volume is waited for virtual machine call as block device service by iSCSI by block device service creation submodule 44.
As shown in Figure 9, in present system, virtual machine block device carry module 6 comprises virtual machine information acquisition submodule 61, service discovery submodule 62, block device carry submodule 63;
Virtual machine information obtains the information that submodule 61 obtains user's designated virtual machine; Specifically comprise the ip address of virtual machine and the ip address of virtual machine place server.
The service discovery submodule 62 iSCSI promoter program called in virtual machine finds the device service that memory node creates.
Block device carry submodule 63 uses the user name of generation in User Summary generation submodule 42 and informative abstract to sign in in equipment.
Example:
In order to verify feasibility and the validity of the inventive method, configuration-system under true environment, the persistent storage of virtual-machine data under cloud environment is tested.
Server basic hardware of the present invention and software merit rating as shown in table 1:
Table 1
Module of the present invention is disposed and is altogether comprised 6 modules: user's request processing module, memory node disc information analysis module, memory node establishing logical volume module, iSCSI service register module, block device dilatation module and virtual machine block device carry module.Host node deploy user request processing module, memory node disc information analysis module and virtual machine block device carry module, memory node deploy memory node establishing logical volume module, iSCSI service register module and block device dilatation module.
The present invention uses LVM manage the disk space on physical cluster and distribute, and uses thrift far call obtaining information and perform respective operations between host node and memory node.For user's request, analyze and select memory node to create block device, and hanging equipment is downloaded in the virtual machine that user specifies.Thus the reliability that under guarantee cloud environment, in virtual machine, data store, availability.
Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present invention; not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. the persistent storage method of virtual-machine data under cloud environment, is characterized in that, comprise the following steps:
(1) user's request of host node reception server, and judge that this user request creates block device, or dilatation is carried out to block device, if create block device then jump to step (2), if carry out dilatation to block device then jump to step (5);
(2) obtain the disc information of all memory nodes, according to user's request selecting memory node, and notify that this memory node creates block device; Step (2) comprises following sub-step:
(2-1) host node obtains the disc information of all memory nodes by Thrift far call framework, comprises disk remaining space information and the disk I/O information of memory node;
(2-2) information that obtains of host node analysis, these memory nodes are sorted according to disk I/O by select disk remaining space to be greater than memory node that user institute applies for space from small to large, and the node selecting disk I/O minimum establishment block device;
(2-3) host node obtains the return information of memory node, and judges that return information instruction creates block device success or failure, if return information instruction creates block device success, then process terminates, if failure, then enters step (2-4);
(2-4) establishment is unsuccessfully write daily record by host node, then jumps to step (2-2);
(3) memory node according to the information creating of host node and management logic volume;
(4) logical volume is registered in iSCSI by memory node, makes this logical volume be supplied to virtual machine call as block device service;
(5) host node is according to the memory node at user's acquisition request block device place, and calls this memory node and carry out dilatation to block device;
(6) service of host node notice virtual machine block device has created complete, and virtual machine provides block device by iSCSI to user.
2. persistent storage method according to claim 1, is characterized in that, step (4) comprises following sub-step:
(4-1) logical volume created in step (3) adds in iscsi target service by memory node;
(4-2) generate MD5 according to the information of caller, use the password of logical volume as user;
(4-3) username and password of virtual machine access block device service is set;
(4-4) by iSCSI, logical volume is waited for virtual machine call as block device service.
3. persistent storage method according to claim 2, is characterized in that, step (6) comprises following sub-step:
(6-1) host node obtains the information of user's designated virtual machine; Specifically comprise the ip address of virtual machine and the ip address of virtual machine place server;
(6-2) the host node iSCSI promoter program called in virtual machine finds the device service that the memory node in step (4-4) creates;
(6-3) virtual machine signs in in block device according to the user name in step (4-2) and informative abstract.
4. persistent storage method according to claim 1, is characterized in that, in step (3), memory node creates the logical volume of being specified size by host node by LVM.
5. persistent storage method according to claim 1, is characterized in that, the log-on message in step (4) comprises the path of logical volume, username and password required when virtual machine logs in this service.
6. persistent storage method according to claim 1, is characterized in that, in step (5), memory node is by the LVM disk space that additional user specifies in the block device created.
7. the persistent storage system of virtual-machine data under a cloud environment, comprise user's request processing module, memory node disc information analysis module, memory node establishing logical volume module, iSCSI service register module, block device dilatation module and virtual machine block device carry module, it is characterized in that
User's request of user's request processing module reception server, and judge that this user request creates block device, or dilatation is carried out to block device, if create block device then call memory node disc information analysis module, if carry out dilatation then invoking block equipment dilatation module to block device;
Memory node disc information analysis module obtains the disc information of all memory nodes, according to user's request selecting memory node, and notifies that this memory node creates block device; This module comprises following submodule:
First submodule, for being obtained the disc information of all memory nodes by Thrift far call framework, comprises disk remaining space information and the disk I/O information of memory node;
Second submodule, for analyzing the information of acquisition, these memory nodes are sorted according to disk I/O by select disk remaining space to be greater than memory node that user institute applies for space from small to large, and the node selecting disk I/O minimum establishment block device;
3rd submodule, for obtaining the return information of memory node, and judge that return information instruction creates block device success or failure, if return information instruction creates block device success, then process terminates, if failure, then enters the 4th submodule;
4th submodule, for establishment is unsuccessfully write daily record, then enters the second submodule; Memory node establishing logical volume module according to the information creating of host node and management logic volume;
Logical volume is registered in iSCSI by iSCSI service register module, makes this logical volume be supplied to virtual machine call as block device service;
Block device dilatation module according to the memory node at user's acquisition request block device place, and is called this memory node and is carried out dilatation to block device;
The service of virtual machine block device carry module notice virtual machine block device has created complete, and virtual machine provides block device by iSCSI to user.
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| CN103685566A (en) * | 2013-12-25 | 2014-03-26 | 天津火星科技有限公司 | Mobile-terminal-oriented cloud storage achievement method |
| CN106302075B (en) * | 2015-06-29 | 2019-10-29 | 联想(北京)有限公司 | A kind of method and device creating logical volume |
| CN106549986A (en) * | 2015-09-17 | 2017-03-29 | 南京中兴新软件有限责任公司 | A kind of block storage method and device |
| CN105450754B (en) * | 2015-11-30 | 2019-04-26 | 国云科技股份有限公司 | A kind of method of physical machine and the mutually shared cloud disk of virtual machine |
| CN110019081B (en) * | 2017-07-20 | 2023-04-07 | 中兴通讯股份有限公司 | Data persistence processing method, device and system and readable storage medium |
| CN109918359B (en) * | 2019-01-18 | 2022-03-29 | 华南理工大学 | Database service persistence method and system based on sweep |
| CN109857345B (en) * | 2019-01-31 | 2023-01-24 | 电科云(北京)科技有限公司 | System and method for realizing disk mounting interface scheduling management based on concurrency |
| CN111638855A (en) * | 2020-06-03 | 2020-09-08 | 山东汇贸电子口岸有限公司 | Method for physical bare computer to support Ceph back-end volume |
| CN113687795A (en) * | 2021-10-25 | 2021-11-23 | 浩鲸云计算科技股份有限公司 | Method and system for realizing isolation allocation of storage volumes of stateful application |
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