CN106648981A - Continuous data protection based virtual machine data protection method - Google Patents
Continuous data protection based virtual machine data protection method Download PDFInfo
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- CN106648981A CN106648981A CN201611148064.1A CN201611148064A CN106648981A CN 106648981 A CN106648981 A CN 106648981A CN 201611148064 A CN201611148064 A CN 201611148064A CN 106648981 A CN106648981 A CN 106648981A
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- virtual
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- machine
- data protection
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Classifications
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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
- 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
Abstract
The invention discloses a continuous data protection based virtual machine data protection method which includes the steps of 1, mounting a mirrored disk of a storage server to a host machine; 2, writing data into a virtual disk while synchronizing the data to the mirrored disk; 3, taking the mirrored disk as a master disk of the virtual machine when detecting that the virtual disk is damaged; 4, creating an auxiliary virtual disk, recovering data of the mirrored disk to the auxiliary virtual disk, and synchronizing the data, written into the mirrored disk in real time, of the virtual machine to the auxiliary virtual disk; 5, after finishing the recovery in the step 4, taking the auxiliary virtual disk as the master disk of the virtual machine. On the basis of the continuous data protection technology, by means of write operation awareness of the virtual disk, all changes of target data are captured or tracked continuously and the data are transmitted in real time without affecting running of the master data; thus, zero loss of the important data is realized for users.
Description
Technical field
The present invention relates to virtual machine technique field, specifically for, the present invention relates to a kind of be based on continuous data protection
Virtual-machine data guard method.
Background technology
Through the development of several years, cloud computing service was increasingly becoming every profession and trade and realizes informationalized basic sex service, and virtual
Change is then the basic technology of cloud computing service.At present, business-like virtualization product and technology almost by VMWare, Citrix and
The companies of Microsoft tri- monopolize, and the Intel Virtualization Technology increased income then gradually presents the trend of KVM dominances, receive and
From the support energetically of global software companys, hardware company, applied company in a large number, so as to swift and violent in software, hardware, application
Development, define the ecological chain of a maturation, it has also become enterprise carries out the important selection of system virtualization and cloud platform.
At present, for the protected mode of virtual machine mainly carries out backup, incremental backup completely to virtual machine.But, on
The backup mode stated cannot realize zero-data loss after disaster generation, i.e. above-mentioned backup mode cannot realize RPO=0, because
This, obtaining a kind of virtual-machine data guard method for realizing zero-data loss zero-data loss after disaster generation becomes this area
The emphasis of technical staff's research and the target pursued all the time.
The content of the invention
To solve the phenomenon that existing virtual-machine data guard method yet suffers from loss of data, the invention provides a kind of base
In the virtual-machine data guard method of continuous data protection, on the premise of not affecting key data to run, it is possible to achieve continue
Any change that target data occurs is caught or tracks, real-time transmission data realizes zero loss of user's significant data.
To realize above-mentioned technical purpose, the invention discloses a kind of virtual-machine data protection side based on continuous data protection
Method, the guard method comprises the steps,
Step 1, by the mirrored disk carry of storage server on host；
Step 2, while virtual disk is write data into, by data syn-chronization to the mirrored disk；
Step 3, when detecting virtual disk and being damaged, using mirrored disk as virtual machine master.
When virtual machine is to its virtual disk write data, the present invention writes the data syn-chronization to storage server mapping
In the mirrored disk for going out, due to being to be synchronously written, so the no matter injury for causing to virtual disk under any circumstance, can lead to
The mirrored disk for crossing the present invention is protected to virtual-machine data.
Further, the guard method comprises the steps,
Step 4, newly-built auxiliary virtual disk extremely aids in data recovery in mirrored disk in virtual disk, and will be virtual
Machine writes in real time the data syn-chronization of mirrored disk into the auxiliary virtual disk.
Present invention additionally comprises resuming work to virtual disk, completed to the extensive of Backup Data using auxiliary virtual disk
It is multiple.
Further, the guard method comprises the steps,
After the completion of recovering step and synchronizing step are equal in step 5, step 4, using auxiliary virtual disk as virtual machine master,
Normally worked by aiding in virtual disk to complete virtual machine.
Further, in step 1, the storage server is to set relative to the external storage of host internal storage device
Standby, External memory equipment maps mirrored disk to virtual machine.
The present invention by the External memory equipment of carry on host map out come mirrored disk be used as protect storage set
Standby mode, reaches the higher technique effect of protection storage equipment security, and External memory equipment is difficult to by web influence, therefore,
The present invention has the advantages that good reliability, stability are strong, easy to use.
Further, in step 2, writing copy by way of by data syn-chronization to the mirrored disk.By this
Mode, the present invention can realize reaching the purposes such as lossless backup, carrying out safety backup.
Further, in step 4, writing copy by way of by data syn-chronization to it is described auxiliary virtual disk in.Pass through
This mode, the present invention can realize reaching the purposes such as Distortionless, security recovery.
Further, in step 2, the block of mirrored disk is called to drive journey using continuous data protection block device driver
The mode of sequence is by data syn-chronization to the mirrored disk.
Further, in step 4, when data full recovery is into auxiliary virtual disk in mirrored disk, virtual machine will
Receive the end signal that continuous data protection block device driver sends.
Further, virtual machine is under cloud platform environment.
Further, cloud platform environment is built by distributed file system.
Beneficial effects of the present invention are：The present invention by the use of External memory equipment as alternate device, based on sustainable protection skill
Art, is perceived by the write operation of virtual disk, on the premise of not affecting key data to run, persistently catches or track number of targets
According to any change for occurring, real-time transmission data, zero loss of user's significant data is realized.
Maximum advantage of the invention is to complete to shunt the write operation of virtual machine in real time, and a data trnascription is written to original
In having storage system, another data trnascription is written to protection storage device, and the two synchronization is carried out, the data protection backed up in realtime
Data, improve Backup and Restore efficiency.
Description of the drawings
Fig. 1 is based on the virtual-machine data guard method schematic flow sheet of continuous data protection.
Fig. 2 is based on the virtual-machine data backup method schematic flow sheet of continuous data protection.
Fig. 3 is based on the virtual-machine data restoration methods schematic flow sheet of continuous data protection.
Fig. 4 is virtual-machine data protection architecture schematic diagram under the medium cloud platform environment of embodiment one.
Fig. 5 is virtual-machine data protection architecture schematic diagram under the medium cloud platform environment of embodiment two.
Specific embodiment
Detailed explanation and explanation is carried out to the present invention with reference to Figure of description.
Embodiment one：
As shown in Figures 1 to 4, the present invention is based on write operation sense of the QEMU-KVM virtual machines to the virtual disk of virtual machine
Know, under cloud computing environment, by operating in host in block driver (Block Driver) complete in virtual machine
Virtual disk parallel write operation, complete the in real time shunting of the write operation to virtual machine and shunt it is synchronous carry out, realize to backup
Data protection, and then realize protection to virtual-machine data, the virtual-machine data based on continuous data protection of the present invention is protected
It is higher that maintaining method backs up, efficiency preferable with recovery effects.
In general, virtual machine calls virtual disk files using standard driver, realizes the write operation control to data
System.The present invention is different to virtual-machine data write operation control mode from tradition, the invention discloses one kind is protected based on duration data
The virtual-machine data guard method of shield, the guard method comprises the steps,
Step 1, the present invention is loaded into continuous data protection block device driver (QEMU-CDP-Block-Driver)
In virtual platform, by the mirrored disk carry of storage server on host；Storage server in the present invention is relative
In the External memory equipment of host internal storage device, External memory equipment maps mirrored disk to virtual machine, this enforcement
The virtual machine being related in example may be under cloud platform environment, and cloud platform environment can be built by distributed file system.
Step 2, as shown in Figure 1, 2, while virtual disk is write data into, by data syn-chronization to the mirrored disk
In, the present invention writing copy by way of by data syn-chronization to the mirrored disk.In the present embodiment, protected using duration data
Protecting block device driver calls the mode of the block driver of mirrored disk by data syn-chronization to the mirrored disk.
Original device block is being called using continuous data protection block device driver (QEMU-CDP-Block-Driver)
While driver (Original Device Block Driver), the virtual disk write data into virtual machine, profit
Protection equipment block driver is called with continuous data protection block device driver (QEMU-CDP-Block-Driver)
(Protect Device Block Driver), mirrored disk is write data into, mirrored disk as protects storage device
In (Protect Storage), so as to realize the real-time shunting to data write operation, reach the write of a part of data is original
In storage device or storage system, another part data are written in mirrored disk, and this two parts data content is identical.
It should be noted that in the case of original storage device (Original Storage) normal work, carrying out digital independent behaviour
When making, data still read from original storage device (Original Storage).
Step 3, when detecting virtual disk and being damaged, using mirrored disk as virtual machine master.
Step 4, as shown in Figure 1,3, newly-built auxiliary virtual disk, by data recovery in mirrored disk to aiding in virtual disk
In, and virtual machine is write in real time the data syn-chronization of mirrored disk into the auxiliary virtual disk, the present invention is by writing copy
Mode by data syn-chronization to it is described auxiliary virtual disk in；In the present embodiment, when in mirrored disk data full recovery to auxiliary
When helping in virtual disk, in other words, after the completion of data recovery, virtual machine will receive continuous data protection block device driver and send out
The end signal for going out.
After the completion of recovering step and synchronizing step are equal in step 5, step 4, using auxiliary virtual disk as virtual machine master.
Embodiment two：
As shown in Fig. 1,2,3,5, virtual-machine data guard method base under the cloud platform environment of the present embodiment and embodiment one
This is identical, and its difference is：In the present embodiment, cloud platform, in step 1, QEMU- are built based on Ceph distributed file systems
KVM virtual machines map out the mirror of External memory equipment (External Storage) by iSCSI block driver relevant links
As disk, by the use of the mirrored disk as backup disk；In step 2, when QEMU-KVM virtual machines are started, virtual magnetic is selected
Used as master, carry iSCSI mirrored disks are, from disk, after starting virtual machine, virtual disk data to be passed through into iSCSI links same to disk
Mirrored disk is walked, specifically, after virtual machine is opened, continuous data protection block device driver (QEMU-CDP-
Block-Driver now write operation of the QEMU-KVM virtual machines to virtual disk) can be perceived, RBD block driver (RBD are called
Block Driver) virtual disk in write Ceph distributed file systems, and using writing the mode synchronization call of copy
ISCSI block drivers (iSCSI Block Driver) write mirrored disk, to ensure data consistency.Complete initial mirror
As after synchronization, continuous data protection block device driver (QEMU-CDP-Block-Driver) continues to perceive virtual machine to void
Intend the write operation of disk, complete the real-time shunting of data and call different masses to drive write different storage device.In the present embodiment,
It is same also by the mode for writing copy during using continuous data protection block device driver (QEMU-CDP-Block-Driver)
In walking the data write mirrored disk by write virtual disk.
In step 3, when virtual disk damage needs to recover data, newly-built one piece of auxiliary virtual disk is mounted to QEMU-
Under KVM virtual machines, start virtual machine specify newly-built auxiliary virtual disk for mirror image from disk, by the former mirror image of iSCSI carries
Disk is master.After QEMU-KVM virtual machines start, newly-built auxiliary virtual disk will receive to come by the former mirror of iSCSI carries
As data in magnetic disk, recovery process is completed, be recovered rear continuous data protection block device driver (QEMU-CDP-Block-
Driver signal) can be sent and notifies QEMU-KVM virtual machines.In recovery process, the write operation of the disk hung over by iSCSI
By writing copy mode RBD block drivers (RBD Block Driver) will be called synchronously to write newly-built auxiliary virtual magnetic
Disk, realization is resumed work to data；In the present embodiment, cloud platform environment is built by distributed file system, duration data
Protection block device driver (QEMU-CDP-Block-Driver) is developed under QEMU.
It should be noted that under the technology enlightenment of the present invention, protection storage device can be by building local data center
Or special remote service station, then the protection data of virtual machine are put into local data center or special remote service station.
Presently preferred embodiments of the present invention is the foregoing is only, it is all in essence of the invention not to limit the present 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 based on continuous data protection, it is characterised in that the guard method includes as follows
Step,
Step 1, by the mirrored disk carry of storage server on host；
Step 2, while virtual disk is write data into, by data syn-chronization to the mirrored disk；
Step 3, when detecting virtual disk and being damaged, using mirrored disk as virtual machine master.
2. the virtual-machine data guard method based on continuous data protection according to claim 1, it is characterised in that the guarantor
Maintaining method comprises the steps,
Step 4, newly-built auxiliary virtual disk, by data recovery in mirrored disk to aiding in virtual disk, and by virtual machine reality
When write mirrored disk data syn-chronization to it is described auxiliary virtual disk in.
3. the virtual-machine data guard method based on continuous data protection according to claim 2, it is characterised in that the guarantor
Maintaining method comprises the steps,
After the completion of recovering step and synchronizing step are equal in step 5, step 4, using auxiliary virtual disk as virtual machine master.
4. the virtual-machine data guard method based on continuous data protection according to claim 1, it is characterised in that
In step 1, the storage server is the External memory equipment relative to host internal storage device, and external storage sets
Standby mapping mirrored disk is to virtual machine.
5. the virtual-machine data guard method based on continuous data protection according to claim 1, it is characterised in that
In step 2, writing copy by way of by data syn-chronization to the mirrored disk.
6. the virtual-machine data guard method based on continuous data protection according to claim 2, it is characterised in that
In step 4, writing copy by way of by data syn-chronization to it is described auxiliary virtual disk in.
7. the virtual-machine data guard method based on continuous data protection according to claim 3, it is characterised in that
In step 2, the mode of block driver of mirrored disk is called using continuous data protection block device driver by number
According to being synchronized in the mirrored disk.
8. the virtual-machine data guard method based on continuous data protection according to claim 7, it is characterised in that
In step 4, when data full recovery is into auxiliary virtual disk in mirrored disk, virtual machine will receive duration data guarantor
The end signal that protecting block device driver sends.
9. the virtual-machine data guard method based on continuous data protection according to claim 1, it is characterised in that described
Virtual machine is under cloud platform environment.
10. the virtual-machine data guard method based on continuous data protection according to claim 9, it is characterised in that institute
State cloud platform environment to build by distributed file system.
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| CN201611148064.1A CN106648981A (en) | 2016-12-13 | 2016-12-13 | Continuous data protection based virtual machine data protection method |
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| CN109271341A (en) * | 2018-08-31 | 2019-01-25 | 黄疆 | A kind of mirrored disk file filter method |
| CN109710377A (en) * | 2018-12-14 | 2019-05-03 | 国云科技股份有限公司 | A method of restoring kvm virtual machine in the distributed storage of failure |
| CN111858164A (en) * | 2020-07-03 | 2020-10-30 | 苏州浪潮智能科技有限公司 | Continuous data protection method, device, equipment and readable storage medium |
| CN112000282A (en) * | 2020-08-07 | 2020-11-27 | 北京浪潮数据技术有限公司 | Storage double-live method, device and related components |
| CN112416527A (en) * | 2020-11-30 | 2021-02-26 | 深信服科技股份有限公司 | Data recovery method, device, equipment and storage medium |
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Application publication date: 20170510 |