CN106802839A - A kind of virtual-machine data guard method driven based on block - Google Patents
A kind of virtual-machine data guard method driven based on block Download PDFInfo
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- CN106802839A CN106802839A CN201611147659.5A CN201611147659A CN106802839A CN 106802839 A CN106802839 A CN 106802839A CN 201611147659 A CN201611147659 A CN 201611147659A CN 106802839 A CN106802839 A CN 106802839A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1446—Point-in-time backing up or restoration of persistent data
- G06F11/1458—Management of the backup or restore process
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1479—Generic software techniques for error detection or fault masking
- G06F11/1482—Generic software techniques for error detection or fault masking by means of middleware or OS functionality
- G06F11/1484—Generic software techniques for error detection or fault masking by means of middleware or OS functionality involving virtual machines
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/455—Emulation; Interpretation; Software simulation, e.g. virtualisation or emulation of application or operating system execution engines
- G06F9/45533—Hypervisors; Virtual machine monitors
- G06F9/45558—Hypervisor-specific management and integration aspects
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/455—Emulation; Interpretation; Software simulation, e.g. virtualisation or emulation of application or operating system execution engines
- G06F9/45533—Hypervisors; Virtual machine monitors
- G06F9/45558—Hypervisor-specific management and integration aspects
- G06F2009/45587—Isolation or security of virtual machine instances
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- General Engineering & Computer Science (AREA)
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- Quality & Reliability (AREA)
- Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
Abstract
The invention discloses a kind of virtual-machine data guard method driven based on block, the guard method includes：Step 1, in write operation of the QEMU Block Device Drivers layer detection to user's storage volume of virtual machine；Step 2, while data are write to user's storage volume of virtual machine, identical data is write the backup storage volume of External memory equipment；Step 3, when the user of virtual machine stores volume fails, completes reading and writing data and asks by the backup storage volume of External memory equipment；Step 4, after user's storage volume failture evacuation of virtual machine, by user's storage volume of data recovery in the backup storage volume of External memory equipment to virtual machine.The present invention is perceived based on QEMU KVM virtual machines to the write operation of user's storage volume of virtual machine, complete to shunt the write operation of virtual machine in real time, in a data write-in user's storage volume, another data trnascription is written in backup storage volume, when the data of QEMU KVM virtual machines go wrong, the present invention can recover total data.
Description
Technical field
The present invention relates to virtual-machine data calamity for technical field, specifically for, driven based on block the present invention relates to one kind
Dynamic virtual-machine data guard method.
Background technology
KVM virtual machines are a modules of Linux kernel, and it is just integrated in Linux's from after linux2.6.20
In each main release version.KVM virtual machines are managed using the scheduler of Linux itself, and the virtualization of KVM virtual machines is needed
The support of corresponding hardware is wanted, such as, intel VT technologies or AMD V technologies, KVM virtual machines are based on hardware Full-virtualization
's.
But, the change of external environment is often difficult to what is estimated, especially for the KVM virtual machines under cloud environment, such as
Really its virtual disk causes failure because external environment is destroyed, and traditional is put into local data center or special by protection data
The disaster recovery methods such as remote service station cannot often be difficult to recover total data, it is impossible to realize RPO=0.
Therefore, acquisition is a kind of can become people in the art by the method for the virtual-machine data full recovery that disaster occurs
The emphasis of member's research and the target pursued all the time.
The content of the invention
For solve the problems, such as prior art cannot by occur disaster virtual machine data full recovery, the invention provides
A kind of virtual-machine data guard method driven based on block, the virtual magnetic to virtual machine is detected in QEMU Block Device Drivers layer all the time
The write operation of disk, and data to be written is synchronized in the backup storage volume of External memory equipment, when external environment is caused virtually
When machine corrupted data or loss, can the prior data full recovery backed up.
To realize above-mentioned technical purpose, the invention discloses a kind of virtual-machine data guard method driven based on block, should
Guard method includes：
Step 1, in write operation of the QEMU Block Device Drivers layer detection to user's storage volume of virtual machine；
Step 2, while data are write to user's storage volume of virtual machine, External memory equipment is write by identical data
Backup storage volume；
Step 3, when the user of virtual machine stores volume fails, is completed by the backup storage volume of External memory equipment
Reading and writing data is asked；
Step 4, after user's storage volume failture evacuation of virtual machine, by data in the backup storage volume of External memory equipment
Recover to user's storage volume of virtual machine.
Further, in step 4, after the completion of data recovery procedure, return to step 1 is backed up to data again,
Protection virtual-machine data.
Further, in step 4, in data recovery procedure, while being set to user's storage volume and external storage of virtual machine
Write-in data in standby backup storage volume.
Further, in step 2, when reading data, data only are read from user's storage volume of virtual machine.
Further, in step 3, when reading data, data only are read from the backup storage volume of External memory equipment.
Further, on the host where virtual machine, the backup storage volume is outside to External memory equipment carry
The disk that storage device is mapped out.Because External memory equipment is difficult to by web influence, the present invention is by carry on host
External memory equipment maps out the disk for coming as the mode of backup storage volume, reaches the skill for improving protection storage equipment security
Art effect, therefore, the present invention has the advantages that good reliability, stability are strong, easy to use.
Further, in step 3, when the user of virtual machine stores volume fails, by user's storage volume of virtual machine
The backup storage volume of External memory equipment is switched to, to ensure virtual machine normal work.
Further, in step 2, identical data is write the backup of External memory equipment by way of writing data blocks
Storage volume.
Further, in step 4, after the completion of data recovery procedure, data recovery end signal is sent.
Further, in step 2, by the backup storage of identical data write-in External memory equipment by way of writing copy
Volume；In step 4, by the user of data recovery in the backup storage volume of External memory equipment to virtual machine by way of writing copy
Storage volume.The present invention ensure that backup or recovery data are identical with initial data by way of writing copy, thoroughly standby
Part and recovery virtual-machine data, so as to reach the purpose to virtual-machine data protection.
Beneficial effects of the present invention are：The present invention writes behaviour based on QEMU-KVM virtual machines to user's storage volume of virtual machine
Perceive, complete to shunt the write operation of virtual machine in real time, in a data write-in user's storage volume, another data trnascription is write
Enter in backup storage volume, when the data of QEMU-KVM virtual machines go wrong, the present invention can recover total data.
Brief description of the drawings
Fig. 1 is the working state figure of the virtual-machine data protection driven based on block
Fig. 2 is the working mode figure of the virtual-machine data protection driven based on block.
Specific embodiment
The virtual-machine data guard method driven based on block of the invention is carried out with reference to Figure of description detailed
Explain and explanation.
As shown in Figure 1, 2, the invention discloses a kind of virtual-machine data guard method driven based on block, the present invention is based on
The virtualization software QEMU that increases income of shaping, makes it into the user's space instrument of controllable QEMU-KVM virtual machines.In its code,
QEMU defines a block device data structure or block device driver (Block Driver), including each attribute with
And various Block Device Drivers need the function of realization.QEMU virtual systems can be used the Block Device Driver of a set of unified plug-in type
Framework, it defines some interfaces for needing every kind of Block Device Driver to realize.QEMU continuous data protections block drives (QEMU CDP
Block Driver) as one kind therein.The present invention is in order to release the incipient fault for data security under cloud environment, and reinforcing cloud ring
Data safety guarantee under border, targetedly proposes that QEMU continuous data protections block drives (QEMU CDP Block Driver),
Driver work can agree with the QEMU virtualization layers of cloud environment framework with cloud environment perfection, clever according to demand
Work is called.It is under QEMU virtual systems that QEMU continuous data protections block of the present invention drives (QEMU CDP Block Driver)
The block device driver of exploitation, the driver thoroughly solves the problems, such as the data distribution of QEMU-KVM virtual machines, to realize
The high-level continuous data protection of QEMU-KVM virtual machines provides important leverage.
As shown in Figure 1, 2, the present invention is included based on the virtual-machine data guard method that block drives：
Step 1, (QEMU CDP Block Driver) is driven to the write operation of program based on QEMU continuous data protections block
Perceive, in write operation of the QEMU Block Device Drivers layer detection to user's storage volume of virtual machine.
Step 2, while data are write to user's storage volume of virtual machine, by identical data by way of writing copy
The backup storage volume of External memory equipment is write, specifically, in the present embodiment, by identical number by way of writing data blocks
According to the backup storage volume of write-in External memory equipment；External memory equipment carry of the invention is in the host where virtual machine
On, the disk that backup storage volume is mapped out for External memory equipment；In user's storage volume normal work of virtual machine, using should
When reading data with program, only data are read from user's storage volume of virtual machine.Specifically, as shown in figure 1, when application program to
During the storage volume write-in data of QEMU-KVM virtual machines, QEMU continuous data protections block drives (QEMU CDP Block
Driver) carry out data distribution, data while user's storage volume is write, also in the backup storage volume of External memory equipment
A identical data of write-in, it is achieved thereby that the backup to user data, it is achieved thereby that continuous data protection function, this hair
The bright data protection schemes there is provided IO ranks, thus more comprehensively guarantee can be provided virtual machine user data safety.
Step 3, when the user of virtual machine stores volume fails, is completed by the backup storage volume of External memory equipment
Reading and writing data is asked；In the present invention, when the user of virtual machine stores volume fails, the former disk of virtual machine is switched to outer
The backup storage volume of portion's storage device, when reading data, only reads data from the backup storage volume of External memory equipment.
Step 4, after user's storage volume failture evacuation of virtual machine, by External memory equipment by way of writing copy
In backup storage volume data recovery to virtual machine user's storage volume, in the recovery process of data, during virtual machine normal work,
Simultaneously to writing data in user's storage volume of virtual machine and the backup storage volume of External memory equipment.In the present embodiment, data
After the completion of recovery process, data recovery end signal is sent；Return to step 1, carries out data backup work again.
As shown in Fig. 2 the present invention can work as follows：The QEMU continuous data protection blocks that the present invention is mentioned
Driving (QEMU CDP Block Driver) has three kinds of mode of operations：(1) user data requests only pass to main equipment driving
Program, user reads data from user's storage volume, and data, read-write operation and the backup storage volume of equipment are write to user's storage volume
It is completely irrelevant；(2) user data requests only pass to mirroring device driver, and user reads data from backup storage volume, to
Backup storage volume writes data, and the read-write operation of user is completely irrelevant with user's storage volume；(3) user data requests can both be passed
Pass main equipment driver, it is also possible to pass to mirroring device driver；User both can be from user's storage volume receive data
According to, it is also possible to data are read from backup storage volume, while data are write to user's storage volume and backup storage volume, this
Under mode of operation, the read-write operation of user needs the support of user's storage volume and backup storage volume, in other words, it is necessary to user stores
The support of volume and mirroring device.For three kinds of above-mentioned mode of operations, the present invention is capable of achieving following several functions：1st, data are passed
Send：When QEMU continuous data protections block drives (QEMU CDP Block Driver) non-turn-on data diverter function, QEMU holds
Continuous data protection block drives (QEMU CDP Block Driver) using mode of operation (1), and user writable request of data is passed to
Main equipment driver, user to user storage volume read-write data.QEMU continuous data protections block drives (QEMU CDP Block
Driver it is) that the I/O operation of user is simply passed into user's storage volume, I/O operation and the backup storage volume of user have no
Relation, this is identical with the standard environment of QEMU virtual systems, does not have any influence to QEMU virtual system performances.2nd, data
Shunting：This is that QEMU continuous data protections block of the present invention drives (QEMU CDP Block Driver) most basic function, QEMU
Continuous data protection block drives (QEMU CDP Block Driver) using mode of operation (3), and user's read data request is passed to
Main equipment driver, user written data request passes to user's storage volume and mirroring device program simultaneously.User deposits from user
Storage volume reads data, while data are write to user's storage volume and backup storage volume, so as to reach the mesh to user data shunting
's.3rd, master/slave device switching：QEMU continuous data protections block drives (QEMU CDP Block Driver) to be ordered by receiving user
Order, can switch between mode of operation (3) and mode of operation (2).When user stores volume fails, QEMU is lasting
Data protection block drives (QEMU CDP Block Driver) to be switched to mode of operation (2), the read-write of user according to user command
Request of data passes to mirroring device driver, and user reads and writes data from backup storage volume.After master-failure is excluded,
QEMU continuous data protections block drives (QEMU CDP Block Driver) to be switched to mode of operation again according to user command
(3), the read-write request of data of user passes to main equipment driver, and user written data request passes to main equipment and mirror simultaneously
As device program.User reads data from main equipment, while to main equipment and mirroring device write-in data.IO of the user to equipment
Operation is not interrupted, so as to ensure that the continuity of QEMU-KVM virtual machine facilities work.4th, data syn-chronization：Duration data is protected
Shield is other based on block level, and in the process of running, it needs first to replicate main equipment initial data by data syn-chronization
To mirroring device, then the data variation amount of main equipment is write by mirroring device by data distribution, so as to realize data protection
Integrality.Data synchronization process is typically what is completed under QEMU-KVM virtual machine running statuses, and now QEMU duration datas are protected
Protecting block drives (QEMU CDP Block Driver) to be in the data distribution state of mode of operation (3), and user reads from main equipment
Data, while to main equipment and mirroring device write-in data, because data synchronization process there is also main equipment to mirroring device
Data duplication, in fact it could happen that equipment I O concurrency conflict phenomenons cause main equipment inconsistent with the data of mirroring device；In order to ensure
The data consistency of main equipment and mirroring device in data synchronization process, QEMU CDP Drive are introduced mutually in synchronizing process
Reprimand lock.5th, data recovery, also known as data back synchronization, when master-failure excludes preparation to be reused, it is necessary first to by mirror
As device data copies to main equipment, this process is referred to as data recovery, because data recovery is typically virtual in QEMU-KVM
Completed under machine running status, therefore need also exist for protecting the integrality of data.In data recovery procedure, QEMU duration datas
Protection block drives (QEMU CDP Block Driver) to be in mode of operation (3), and different from data distribution state, user is from mirror
As equipment reads data, while to main equipment and mirroring device write-in data, because data recovery procedure there is also mirroring device
To the data duplication of main equipment, in fact it could happen that equipment I O concurrency conflict phenomenons cause mirroring device to differ with the data of main equipment
Cause.In order to mirroring device drives with the data consistency QEMU continuous data protections block of main equipment in ensureing data recovery procedure
(QEMU CDP Block Driver) introduces mutual exclusion lock in recovery process.By the data distribution of QEMU-KVM virtual machines
Realize the high-level continuous data protection of QEMU-KVM virtual machines.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in essence of the invention
Any modification, equivalent and simple modifications for being made in content etc., should be included within the scope of the present invention.
Claims (10)
1. a kind of virtual-machine data guard method driven based on block, it is characterised in that the guard method includes：
Step 1, in write operation of the QEMU Block Device Drivers layer detection to user's storage volume of virtual machine；
Step 2, while data are write to user's storage volume of virtual machine, by the standby of identical data write-in External memory equipment
Part storage volume；
Step 3, when the user of virtual machine stores volume fails, data is completed by the backup storage volume of External memory equipment
Read-write requests；
Step 4, after user's storage volume failture evacuation of virtual machine, by data recovery in the backup storage volume of External memory equipment
To user's storage volume of virtual machine.
2. the virtual-machine data guard method driven based on block according to claim 1, it is characterised in that in step 4, number
After the completion of recovery process, return to step 1.
3. the virtual-machine data guard method driven based on block according to claim 1 and 2, it is characterised in that the step
In rapid 4 data recovery procedure, while being write in user's storage volume of virtual machine and the backup storage volume of External memory equipment
Data.
4. the virtual-machine data guard method driven based on block according to claim 3, it is characterised in that in step 2, read
Access according to when, only read data from user's storage volume of virtual machine.
5. the virtual-machine data guard method driven based on block according to claim 1 or 4, it is characterised in that step 3
In, when reading data, only read data from the backup storage volume of External memory equipment.
6. the virtual-machine data guard method driven based on block according to claim 5, it is characterised in that deposit the outside
Store up on the host where hanging equipment is loaded in virtual machine, the disk that the backup storage volume is mapped out for External memory equipment.
7. the virtual-machine data guard method driven based on block according to claim 1 or 6, it is characterised in that step 3
In, when the user of virtual machine stores volume fails, user's storage volume of virtual machine is switched into the standby of External memory equipment
Part storage volume.
8. the virtual-machine data guard method driven based on block according to claim 7, it is characterised in that in step 2, lead to
Identical data is write the mode for crossing writing data blocks the backup storage volume of External memory equipment.
9. the virtual-machine data guard method driven based on block according to claim 1,2 or 8, it is characterised in that step 4
In, after the completion of data recovery procedure, send data recovery end signal.
10. the virtual-machine data guard method driven based on block according to claim 1, it is characterised in that in step 2,
Identical data is write the backup storage volume of External memory equipment by way of writing copy；In step 4, by the side for writing copy
Formula is by user's storage volume of data recovery in the backup storage volume of External memory equipment to virtual machine.
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| CN201611147659.5A CN106802839A (en) | 2016-12-13 | 2016-12-13 | A kind of virtual-machine data guard method driven based on block |
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| CN201611147659.5A CN106802839A (en) | 2016-12-13 | 2016-12-13 | A kind of virtual-machine data guard method driven based on block |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111240889A (en) * | 2018-11-29 | 2020-06-05 | 阿里巴巴集团控股有限公司 | Data backup system and method and electronic device |
| CN112532701A (en) * | 2020-11-19 | 2021-03-19 | 苏州浪潮智能科技有限公司 | Distributed accelerated storage method and system based on QEMU (quantum execution unit) |
| CN112540872A (en) * | 2020-11-26 | 2021-03-23 | 华云数据控股集团有限公司 | Universal continuous data protection method and device and electronic equipment |
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| CN105589733A (en) * | 2015-11-27 | 2016-05-18 | 杭州华三通信技术有限公司 | Data processing method and device |
| CN106020932A (en) * | 2015-05-21 | 2016-10-12 | 中国科学院计算技术研究所 | Security protection method and system used for KVM system |
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| US6317814B1 (en) * | 1998-07-01 | 2001-11-13 | Storage Technology Corporation | Method for selectively storing redundant copies of virtual volume data on physical data storage cartridges |
| CN106020932A (en) * | 2015-05-21 | 2016-10-12 | 中国科学院计算技术研究所 | Security protection method and system used for KVM system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111240889A (en) * | 2018-11-29 | 2020-06-05 | 阿里巴巴集团控股有限公司 | Data backup system and method and electronic device |
| CN112532701A (en) * | 2020-11-19 | 2021-03-19 | 苏州浪潮智能科技有限公司 | Distributed accelerated storage method and system based on QEMU (quantum execution unit) |
| CN112532701B (en) * | 2020-11-19 | 2022-07-15 | 苏州浪潮智能科技有限公司 | Distributed accelerated storage method and system based on QEMU (quantum execution unit) |
| CN112540872A (en) * | 2020-11-26 | 2021-03-23 | 华云数据控股集团有限公司 | Universal continuous data protection method and device and electronic equipment |
| CN112540872B (en) * | 2020-11-26 | 2022-04-01 | 华云数据控股集团有限公司 | Universal continuous data protection method and device and electronic equipment |
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