CN103118073A - 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 has obtained vigorous growth and has used widely.In virtual machine, the data store and management has also received more and more people's attention and concern.
The flexible allocation that virtual CPU with physical server, internal memory, storage and network security are isolated to improve the utilization rate of resource and realized resource.The IaaS platform is converted into flexible virtual infrastructure by Intel Virtualization Technology with physical resource 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 problem and challenge newly also for the data tape in virtual machine.At first under cloud environment, it is not persistence that the user is stored in data in virtual machine, closes or accident is delayed after machine when virtual machine, and the data that the user is kept in virtual machine will all be lost; The user is stored in the size that data in virtual machine are subject to virtual machine image, can not satisfy the user to the demand of storage dynamic growth; A kind of improvement project is to use the increment mirror image, but this is unfavorable for the management of data, and the data in the increment mirror image may not be that the user is needed entirely; In original solution, data are all closely-coupled with virtual machine, data are corresponding one by one with virtual machine, the user will obtain the virtual machine that data must first start appointment, 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, reduce the availability of system.
Summary of the invention
Defective for 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, be intended to solve the problem that user data in existing cloud computing system can not persistent storage after virtual machine is closed, and the method data and virtual machine are not closely-coupled, have simplified 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 of host node reception server request, and judge that this user's request is to create block device, or block device is carried out dilatation, jump to step (2) if create block device, if being carried out dilatation, block device jumps to step (5);
(2) obtain the disc information of all memory nodes, ask to select a memory node according to the user, and notify this memory node to create block device;
(3) memory node is according to information creating and the management logic volume of host node;
(4) memory node is registered to logical volume in iSCSI, and service offers virtual machine call as block device to make this logical volume;
(5) host node is according to the memory node at user's acquisition request block device place, and calls this memory node block device is carried out dilatation;
(6) service of host node notice virtual machine block device has created completely, and virtual machine provides block device by iSCSI to the user.
Step (2) comprises following substep:
(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 obtained of host node analysis selects the disk remaining space greater than the memory node in space that the user applies for, these memory nodes is sorted from small to large according to disk I/O, and select the node establishment block device of disk I/O minimum;
(2-3) host node obtains the return information of memory node, and judgement return information indication establishment block device success or failure, if the success of return information indication establishment block device, process finishes, if failure enters step (2-4);
(2-4) host node will create and unsuccessfully write daily record and reselect new memory node, then jump to step (2-2).
Step (4) comprises following substep:
(4-1) memory node adds the logical volume that creates in step (3) in the iscsi target service to;
(4-2) according to the Information generation MD5 of caller, use the password of logical volume as the 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 the block device service.
Step (6) comprises following substep:
(6-1) host node obtains the information of user's designated virtual machine; Particularly comprise the ip address of virtual machine and the ip address of virtual machine place server;
(6-2) host node calls the device service that the memory node of iSCSI promoter program discovery in step (4-4) in virtual machine creates;
(6-3) virtual machine signs in in block device according to user name and informative abstract in step (4-2).
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, required username and password when virtual machine is logined this service.
Memory node appends the disk space of user's appointment in the block device that has created by LVM in step (5).
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 registry 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's request is to create block device, or block device is carried out dilatation, if it is call memory node disc information analysis module, if block device is carried out invoking block equipment dilatation module of dilatation, memory node disc information analysis module obtains the disc information of all memory nodes, ask to select a memory node according to the user, and notify this memory node to create block device, memory node establishing logical volume module is according to information creating and the management logic volume of host node, iSCSI service registry module is registered to logical volume in iSCSI, service offers virtual machine call as block device to make this logical volume, block device dilatation module is according to the memory node at user's acquisition request block device place, and call this memory node block device is carried out dilatation, 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 the 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, can realize the block device storage: owing to having adopted step (3), step (4) and step (6), native system is by the SCSI instruction set in the operation of IP layer, the block device of physical machine is mounted in virtual machine, at the memory space of the new interpolation of user just as the virtual machine local device.The user can build a file system on equipment, also can use as the block device of an original not format.Just only being to provide the file that is used for storage in system than the carry by user's space file system (FUSE), is not the block device on practical significance.
2, extensibility is strong: due to adopted step (5) user can be in needs 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.The advantage of comparing the mode that adopts the increment mirror image is, the increment mirror image just reaches the effect of Copy on write in the use, preserve the data that the user writes in the virtual machine disk, but finally still be subject to the size of virtual machine template mirror image, increment just constantly increases the disk space that uses on usage behavior, but the disk space that finally can use is fixed, and can not satisfy the user and disk space be increased the demand of dilatation.
3, loose coupling: due to the use decoupling zero of having adopted step (3) system of the present invention the storage resources of virtual machine, make storage be independent of virtual machine.The user can with the application block device carry between different virtual machines, storage resources is no longer corresponding one by one with specific virtual machine, but as one independently system manage.
Description of drawings
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 system of the present invention.
Fig. 8 is the refinement block diagram of iSCSI service registry module in system of the present invention.
Fig. 9 is the refinement block diagram of virtual machine block device carry module in system of the present invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, 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, is not intended to limit the present invention.
As shown in Figure 1, the present invention provides memory device for the user under virtual machine environment.The total n platform physical machine 1,2 of physical machine in figure ..., n, wherein physical machine 1 is host node, physical machine 2 to n is memory node.Host node is responsible for processing user's request, selects suitable memory node allocation block equipment and the flow process of managing whole request according to the disc information of memory node, and concrete block device operation is completed by the Thrift far call.Each memory node provides the memory node disc information, and actuating equipment creates, the dilatation operation, and offers host node by the Thrift far call as service.When the user created equipment to system's application, the memory node information that the host node utilization is obtained was selected corresponding node establishment or dilatation block device and is mounted in virtual machine to use.
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 of host node reception server request, and judge that this user's request is to create block device, or block device is carried out dilatation, jump to step (2) if create block device, if being carried out dilatation, block device jumps to step (5);
(2) obtain the disc information of all memory nodes, ask to select a memory node according to the user, and notify this memory node to create block device; Particularly, the information of obtaining memory node comprises disk remaining space information and disk I/O information;
(3) memory node is according to information creating and the management logic volume of host node; Particularly, memory node creates the logical volume of being specified size by host node by LVM;
(4) memory node is registered to logical volume in iSCSI, and service offers virtual machine call as block device to make this logical volume; Particularly, log-on message comprises the path of logical volume, required username and password when virtual machine is logined this service;
(5) host node is according to the memory node at user's acquisition request block device place, and calls this memory node block device is carried out dilatation;
(6) service of host node notice virtual machine block device has created completely, and virtual machine provides block device by minicomputer system instruction interface (Internet Small Computer System Interface is called for short iSCSI) to the user.
The Thrift far call framework of Facebook is adopted in communication between different system.
As shown in Figure 3, in the inventive method, step (2) comprises following substep:
(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 obtained of host node analysis selects the disk remaining space greater than the memory node in space that the user applies for, these memory nodes is sorted from small to large according to disk I/O, and select the node establishment block device of disk I/O minimum;
(2-3) host node obtains the return information of memory node, and judgement return information indication establishment block device success or failure, if the success of return information indication establishment block device, process finishes, if failure enters step (2-4);
(2-4) host node will create and unsuccessfully write daily record and reselect new memory node, then jump to step (2-2).
As shown in Figure 4, in the inventive method, step (4) comprises following substep:
(4-1) memory node adds the logical volume that creates in step (3) in the iscsi target service to; Particularly, the log-on message that memory node offers iSCSI comprises the path of logical volume, file type and service name;
(4-2) according to the Information generation caller informative abstract (Message digest-5 is called for short MD5) of caller, use the password of logical volume as the 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 the block device service.
As shown in Figure 5, in the inventive method, step (6) comprises following substep:
(6-1) host node obtains the information of user's designated virtual machine; Particularly comprise the ip address of virtual machine and the ip address of virtual machine place server;
(6-2) host node calls the device service that the memory node of iSCSI promoter program discovery in step (4-4) in virtual machine creates;
(6-3) virtual machine signs in in block device according to user name and informative abstract in step (4-2).
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 registry 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's request is to create block device, or block device is carried out dilatation, if it is call memory node disc information analysis module 2, if block device is carried out invoking block equipment dilatation module 5 of dilatation.
Memory node disc information analysis module 2 obtains the disc information of all memory nodes, asks to select a memory node according to the user, and notifies this memory node to create block device.
Memory node establishing logical volume module 3 is according to information creating and the management logic volume of host node.
ISCSI service registry module 4 is registered to logical volume in iSCSI, and service offers virtual machine call as block device to make this logical volume.
Block device dilatation module 5 memory nodes according to user's acquisition request block device place, and call this memory node block device is carried out dilatation.
The 6 notice virtual machine block device services of virtual machine block device carry module have created complete, and virtual machine provides block device by iSCSI to the user.
As shown in Figure 7, in system of the present invention, memory node disc information analysis module 2 comprises that memory node acquisition of information submodule 21, information analysis submodule 22, equipment create far call submodule 23, create failure handling submodule 24.
Memory node acquisition of information submodule 21 obtains the disc information of all memory nodes by Thrift far call framework, comprise disk remaining space information and the disk I/O information of memory node.
Information analysis submodule 22 is analyzed the information of obtaining, at first select the disk remaining space greater than the memory node in space that the user applies for, host node sorts these memory nodes from small to large according to disk I/O, and selects the node of disk I/O minimum to create block device.
Equipment creates the return information that far call submodule 23 obtains memory node, and judgement return information indication establishment block device success or failure, if the success of return information indication establishment block device, process finishes, if failure is called and is created failure handling submodule 24.
Create the 24 register system daily records of failure handling submodule, and Selective storage child node again.
As shown in Figure 8, in system of the present invention, iSCSI service registry module 4 comprises that logical volume registration submodule 41, User Summary generate submodule 42, service password arranges submodule 43, block device service creation submodule 44.
Logical volume registration submodule 41 adds logical volume to iSCSI(minicomputer system instruction interface) in destination service; Particularly, the memory node log-on message that offers iSCSI comprises path, file type and the service name of logical volume.
User Summary generates submodule 42 according to the Information generation caller informative abstract (Message digest-5 is called for short MD5) of caller, uses the password of logical volume as the user.
Service password arranges the username and password that submodule 43 arranges virtual machine access block device service.
Block device service creation submodule 44 is waited for virtual machine call with logical volume as the block device service by iSCSI.
As shown in Figure 9, in system of the present invention, virtual machine block device carry module 6 comprises that virtual machine information obtains 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; Particularly comprise the ip address of virtual machine and the ip address of virtual machine place server.
The iSCSI promoter program that service discovery submodule 62 calls in virtual machine is found the device service that memory node creates.
The user name and the informative abstract that generate in block device carry submodule 63 user's summarization generation submodules 42 sign in in equipment.
Example:
For feasibility and the validity of verifying the inventive method, configuration-system under true environment is tested the persistent storage of virtual-machine data under cloud environment.
Server basic hardware of the present invention and software configuration are 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 registry 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 registry module and block device dilatation module.
The present invention uses LVM that the disk space on physical cluster is managed and distributes, and uses thrift far call obtaining information between host node and memory node and carries out respective operations.For user's request, analyze the Selective storage node and create block device, and hanging equipment is downloaded in the virtual machine of user's appointment.Thereby the reliability of data storage in virtual machine under the assurance cloud environment, availability.
Those skilled in the art will readily understand; the above is only preferred embodiment of the present invention; not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (8)
1. the persistent storage method of virtual-machine data under a cloud environment, is characterized in that, comprises the following steps:
(1) user of host node reception server request, and judge that this user's request is to create block device, or block device is carried out dilatation, jump to step (2) if create block device, if being carried out dilatation, block device jumps to step (5);
(2) obtain the disc information of all memory nodes, ask to select a memory node according to the user, and notify this memory node to create block device;
(3) memory node is according to information creating and the management logic volume of host node;
(4) memory node is registered to logical volume in iSCSI, and service offers virtual machine call as block device to make this logical volume;
(5) host node is according to the memory node at user's acquisition request block device place, and calls this memory node block device is carried out dilatation;
(6) service of host node notice virtual machine block device has created completely, and virtual machine provides block device by iSCSI to the user.
2. persistent storage method according to claim 1, is characterized in that, step (2) comprises following substep:
(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 obtained of host node analysis selects the disk remaining space greater than the memory node in space that the user applies for, these memory nodes is sorted from small to large according to disk I/O, and select the node establishment block device of disk I/O minimum;
(2-3) host node obtains the return information of memory node, and judgement return information indication establishment block device success or failure, if the success of return information indication establishment block device, process finishes, if failure enters step (2-4);
(2-4) host node will create and unsuccessfully write daily record and reselect new memory node, then jump to step (2-2).
3. persistent storage method according to claim 1, is characterized in that, step (4) comprises following substep:
(4-1) memory node adds the logical volume that creates in step (3) in the iscsi target service to;
(4-2) according to the Information generation MD5 of caller, use the password of logical volume as the 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 the block device service.
4. persistent storage method according to claim 1, is characterized in that, step (6) comprises following substep:
(6-1) host node obtains the information of user's designated virtual machine; Particularly comprise the ip address of virtual machine and the ip address of virtual machine place server;
(6-2) host node calls the device service that the memory node of iSCSI promoter program discovery in step (4-4) in virtual machine creates;
(6-3) virtual machine signs in in block device according to user name and informative abstract in step (4-2).
5. 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.
6. persistent storage method according to claim 1, is characterized in that, the log-on message in step (4) comprises the path of logical volume, required username and password when virtual machine is logined this service.
7. persistent storage method according to claim 1, is characterized in that, memory node appends the disk space of user's appointment in the block device that has created by LVM in step (5).
8. 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 registry 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's request is to create block device, or block device is carried out dilatation, if it is call memory node disc information analysis module, if block device is carried out invoking block equipment dilatation module of dilatation;
Memory node disc information analysis module obtains the disc information of all memory nodes, asks to select a memory node according to the user, and notifies this memory node to create block device;
Memory node establishing logical volume module is according to information creating and the management logic volume of host node;
ISCSI service registry module is registered to logical volume in iSCSI, and service offers virtual machine call as block device to make this logical volume;
Block device dilatation module is according to the memory node at user's acquisition request block device place, and calls this memory node block device is carried out dilatation;
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 the user.
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| 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 |
| CN105450754A (en) * | 2015-11-30 | 2016-03-30 | 国云科技股份有限公司 | Method of physical machine and virtual machine for mutually sharing cloud disk |
| 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 |
| CN110019081A (en) * | 2017-07-20 | 2019-07-16 | 中兴通讯股份有限公司 | Data persistence processing method, device, system and readable storage medium storing program for executing |
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| CN109918359B (en) * | 2019-01-18 | 2022-03-29 | 华南理工大学 | Database service persistence method and system based on sweep |
| CN109857345A (en) * | 2019-01-31 | 2019-06-07 | 合肥谐桐科技有限公司 | Realize the system and method based on concurrent disk carry interface management and running |
| 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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