CN106790713B - Across data center virtual machine migration method under cloud computing environment - Google Patents
Across data center virtual machine migration method under cloud computing environment Download PDFInfo
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- 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
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Abstract
The invention discloses across the data center virtual machine migration methods under a kind of cloud computing environment, step includes establishing the mirror site of operating system, when user creates virtual machine instance based on the operating system mirror image in mirror site, the operating system mirror image of virtual machine instance is stored in the form of share operating system mirror image adds independent delta file；After any one source data center receives across the data center virtual machine (vm) migration instruction of operator's transmission migrated from source data center target virtual machine to target data center, virtual machine (vm) migration pretreatment is passed sequentially through, synchronization of across data center virtual machine delta file, across the data center migration of virtual machine, virtual machine (vm) migration post-process across the data center virtual machine (vm) migration of completion.The present invention has the advantages that the support independent of shared storage, the read-write of Back end data do not need by establish data channel on the internet, disaster recovery backup it is high-efficient, occupy that memory space is small, backup rate is fast.
Description
Technical field
The present invention relates to across the data center migrating technologies of virtual machine under cloud computing environment in computer field, and in particular to
A kind of across data center virtual machine migration method under cloud computing environment.
Background technique
With the raising of IT application in enterprises degree, the construction at Enterprise Data center has become the current industrial application of information technology
New hot spot.Compared with conventional data centers, data center's server, storage, the continuous growth of network and concentration manage for it
O&M brings more challenges.
Now with the increasingly mature of cloud computing technology, cloud computing technology has been obtained extensively in military and economic field
Application, be also widely used in the construction of data center.By realizing the resource virtualizing of data center's infrastructure,
To apply, data and physical resource are separated from each other in logic management, IT department can more efficiently, strain more promptly
With more flexible provide and safeguard the service of data center, business department can also focus more on using the clothes with data
Business.It generally speaking can realize that following advantage lays the foundation by data center virtualization with IT department: 1. reduce overall possess into
This (TCO): data center virtualization can help IT department to improve the validity of utilization rate of equipment and installations and using energy source, promote operation
Efficiency, and reduce investment expenditure.2. improving indissolubility: abstracting power provided by data center virtualization facilitates in not
Prearranged maintenance shut-downs are carried out in the case where disconnected regular traffic, and are more promptly restored from unexpected suspension accident.
3. improving flexibility: because IT department not will receive the limitation of predetermined relationship between service and physical hardware, a coordination
Consistent virtualized infrastructure can promptly meet new application and service demand.Simultaneously because calamity is standby, office space point
Scattered reason, enterprise generally can all build two or more data centers, and different data centers passes through internet encrypted tunnel
Carry out data transmission.
In order to facilitate the virtualization resource at applicable data center, ensured inside data center using desktop virtual technology
Availability of the user to virtual resource.On the whole desktop virtualization have following advantage: 1. more extensively with simplified terminal
Equipment is supported.High-end end is no longer required for since all calculating all carries out on the server as a kind of mode of cloud computing
The alternative of end equipment, terminal device is more extensive, meets different application demands.2. terminal device buying, maintenance cost
It substantially reduces.3. centralized management, unified configuration, use are safe.Administrator can data center to all desktops and application into
The unified configuration of row and management, such as system upgrade, using installation, avoid difficult management and cost as caused by terminal distribution
It is high.But it also brings certain deficiency, since virtual desktop is to provide computing capability by the virtual machine on backstage, then pass through
Transmitted data on network shows to front end, so having apparent gap, especially network in performance compared with traditional PC machine
When performance is poor.
It is limited to solve virtual desktop when network performance is bad to using bring, under forms data center, usually
Using the virtual machine Placement Strategy of location aware, so that having certain network between the virtual machine of user and virtual desktop terminal
Bandwidth safeguard.It is empty if different data center locating for virtual machine and virtual desktop but in multiple data centers running environment
Quasi- desktop in use, needs to carry out data transmission by internet, the strong influence user experience of virtual desktop.
Summary of the invention
The technical problem to be solved in the present invention: in view of the above problems in the prior art, one kind is provided and is deposited independent of shared
The support of storage, the read-write of virtual desktop Back end data are not needed by establishing data channel on the internet, disaster recovery backup
Across data center virtual machine migration method high-efficient, under the occupancy cloud computing environment that memory space is small, backup rate is fast.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention are as follows:
A kind of across data center virtual machine migration method under cloud computing environment, step include:
1) mirror site of operating system is established, operating system mirror needed for creation virtual machine is stored in the mirror site
Picture；When user creates virtual machine instance based on the operating system mirror image in mirror site, by the operating system mirror of virtual machine instance
As being deposited in the form of share operating system mirror image adds independent delta file in the shared storage of local data center
Storage；The migrating target virtual machine to number of targets from source data center of operator's transmission is received in any one source data center
After across the data center virtual machine (vm) migration instruction at center, jumps and execute step 2)；
2) source data center registers the information of target virtual machine to local agent, the sheet of each source data center
Ground agent maintenance has the record of the information across data center's virtual machine to be migrated, and the information record includes following field informations；
<image_id,user_id,instance_id,slocation,dlocation,data,flag>
Wherein, image_id is the mirror image unique identifier of target virtual machine, and user_id is unique mark of user in system
Knowing symbol, instance_id is the unique identifier of virtual machine instance, and slocation is the identifier of source data center,
Dlocation is the identifier at target data center, and data indicates the compressed data of the delta file of target virtual machine, and flag is
Data synchronous regime, flag be 0 indicate synchronize it is unfinished, flag be 1 expression data synchronously complete；
3) source data center carries out periodic scan to the information record that local agent is registered, if what certain information recorded
The identifier of dlocation field and source data center is inconsistent and flag value is 0, then log-on data remote synchronization mechanism, will
This information recording synchronism to the corresponding target data center of dlocation field local agent；After synchronously completing, source data
Center, target data center set 1 for the flag value of the information record of local agent storage respectively；
4) target data center creates new virtual machine instance, generates share operations in the shared storage at target data center
System image adds independent delta file, unzips it the data field of the information record of local agent storage to obtain target
The delta file of virtual machine, and the delta file of target virtual machine is replaced to the delta file of new virtual machine instance, then again
Start new virtual machine instance, completes target virtual machine in the recovery at target data center；
5) local agent at target data center deletes the information record, and notifies to be deleted in information record
The local agent of the corresponding source data center of slocation field deletes corresponding information record.
Preferably, each operating system mirror image passes through < image_id, iamge_name in mirror site described in step 1),
Image_des, image_url > field are described, and wherein image_id is unique mark of operating system mirror image, image_
Name is the title of operating system mirror image, and image_des is the description information of operating system mirror image, and image_url is operation system
The storage location of system mirror image.
Preferably, the operating system mirror image of virtual machine instance is adopted in the shared storage of local data center in step 1)
When adding the form of independent delta file to be stored with share operating system mirror image, the storage organization of all operating system mirror images
Form is shown below；
In above formula, base indicates operating system mirror imageCommon ground content, inst11With
inst12Indicate share operating system mirror imageTwo virtual machine instances delta file, inst21It indicates using operation
System imageVirtual machine instance delta file, instnmIt indicates to use operating system mirror imageM-th
The delta file of virtual machine instance, n are operating system mirror image quantity, and m is share operating system mirror imageVirtual machine it is real
Number of cases amount.
Across data center virtual machine migration method under cloud computing environment of the present invention is by the operating system mirror of virtual machine instance
As being deposited in the form of share operating system mirror image adds independent delta file in the shared storage of local data center
Storage is synchronized using the information record comprising delta file compressed data, greatly improves virtual machine and move across data center
The cost of shifting, this method have following advantage:
1, support of the present invention independent of shared storage.Virtual migration existing at present is concentrated mainly in data center
The online migration in portion, under the support of shared storage, it is only necessary to migrate internal storage data virtual machine can be completed and taken in different physics
Migration between business device.In multiple data centers, the virtual machine (vm) migration across data center, the think of migrated online is still used for reference at present
Road, the support dependent on shared storage.
2, the read-write of virtual desktop Back end data is not needed by establishing data channel on the internet, can be improved table
The user experience of face virtualization.Due to the relationship of network performance, user can use in notebook data by products such as virtual desktops
The virtual resource of the heart, but once since business etc. needs other place offices, even if using existing virtual machine (vm) migration side
Method, the read-write of Back end data influence the experience of user there is still a need for by establishing data channel on the internet.
3, the present invention can be improved the efficiency of disaster recovery backup.Even if existing disaster recovery backup mechanism is using incremental backup right
Virtual machine backed up for the first time when, it is still desirable to do a full backup, the memory space not only greatly wasted, but also
Reduce backup rate.The form that the present invention is separated from each other using share operating system mirror image, independent delta file, occupancy are deposited
It is small to store up space, and backup also only needs to back up delta file, so as to improve the efficiency of disaster recovery backup.
4, the present invention migrates online across data center for virtual machine in conjunction with existing online migrating technology and provides a kind of possibility
Property.Migration of the virtual machine across data center is provided in the present invention, and the limitation of this migration is virtual machine in transition process
It needs to shut down.For this limitation it is subsequent can by using for reference memory simultaneous techniques in online transition process, realize virtual machine across
Data center migrates online.
Detailed description of the invention
Fig. 1 is the basic procedure schematic diagram of present invention method.
Specific embodiment
It hereafter will be by taking kylin cloud computing system as an example, to across the data center virtual machine (vm) migration under cloud computing environment of the present invention
Method is described in further detail.It should be pointed out that the invention is not limited to any specific hardware platform and behaviour
Make system, method is transplanted in other environment in which can be convenient, and has wide versatility.
As shown in Figure 1, the step of across data center virtual machine migration method under the present embodiment cloud computing environment, includes:
1) virtual machine image library and virtual machine instance organizational form are set: establishing the mirror site of operating system, the mirror image
Operating system mirror image needed for being stored with creation virtual machine in library；When user creates void based on the operating system mirror image in mirror site
When quasi- machine example, the operating system mirror image of virtual machine instance is used into share operations system in the shared storage of local data center
System mirror image adds the form of independent delta file to be stored；To for operator's transmission is received in any one source data center
Target virtual machine is migrated from source data center to across the data center virtual machine (vm) migration instruction at target data center, jumps execution
Step 2).
In the present embodiment, each operating system mirror image passes through < image_id, iamge_ in mirror site described in step 1)
Name, image_des, image_url > field are described, and wherein image_id is unique mark of operating system mirror image,
Image_name is the title (such as windows7, kylin64bit etc.) of operating system mirror image, and image_des is operating system
The description information of mirror image, image_url are the storage location of operating system mirror image；In the present embodiment, for the ease of the void in later period
Quasi- across the data center migration of machine, image_id use the MD5 value of the original of mirror image；And the present embodiment Zhong Ge data center uses
Identical mirror site, i.e., used operating system is the unified operating system provided, same based on this Liang Ge data center
The operating system of a version then image_id value having the same.
In the present embodiment, in step 1) by the operating system mirror image of virtual machine instance local data center shared storage
On when being stored in the form of share operating system mirror image adds independent delta file, the storage of all operating system mirror images
Organizational form is shown below；
In above formula, base indicates operating system mirror imageCommon ground content, inst11With
inst12Indicate share operating system mirror imageTwo virtual machine instances delta file, inst21It indicates using operation
System imageVirtual machine instance delta file, instnmIt indicates to use operating system mirror imageM-th
The delta file of virtual machine instance, n are operating system mirror image quantity, and m is share operating system mirror imageVirtual machine it is real
Number of cases amount.inst11、inst12、inst21Deng the delta file exclusive for respective virtual machine instance, title (carries out area with subscript
It is) not identical as the unique identifier of virtual machine instance (instance_id), it is however generally that the mirror image of a 10G size is created that
Come virtual machine incremental portion file size only have 200M or so (can with the increase of user program in virtual machine use process and
Increase).Such as three virtual machine instances of user's creation are instance respectively in the present embodiment11、instance12With
instance21, wherein instance11、instance12Two virtual machines use identical operating system mirror imageWound
It builds, then virtual machine file according to general character base adds respective delta file form tissue in shared storage, i.e.,Therefore it can detect whether that there are phases in base first when creating virtual machine every time
With the virtual machine instance of mirror image, if there is the independent delta file of virtual machine creating thus is only needed, otherwise need same
When creation base in general character image file and independent delta file.
2) virtual machine (vm) migration pre-processes: source data center registers the information of target virtual machine to local agent, often
The local agent maintenance of one source data center has the record of the information across data center's virtual machine to be migrated, the information record packet
Include following field informations；
<image_id,user_id,instance_id,slocation,dlocation,data,flag>
Wherein, image_id is the mirror image unique identifier of target virtual machine, and user_id is unique mark of user in system
Knowing symbol, instance_id is the unique identifier of virtual machine instance, and slocation is the identifier of source data center,
Dlocation be target data center identifier, data indicate target virtual machine delta file compressed data (by
The corresponding virtual machine instance of instance_id corresponding delta file in shared storage compresses to obtain), flag is synchronous for data
State, flag be 0 indicate synchronize it is unfinished, flag be 1 expression data synchronously complete.System receives the void of operator's transmission
After quasi- across the data center migration instruction of machine, the data of target virtual machine are pre-processed, step is specifically mainly executed
2) target virtual machine relevant information is registered to the local agent of source data center.
3) across data center virtual machine delta file is synchronous: source data center carries out the information record that local agent is registered
Periodic scan, if the dlocation field of certain information record and identifier of source data center is inconsistent and flag value
It is 0, then log-on data remote synchronization mechanism, by this information recording synchronism into the corresponding target data of dlocation field
The local agent of the heart；After synchronously completing, the information of source data center, target data center respectively by local agent storage is recorded
Flag value be set as 1.Step 3) mainly realizes that the data between multiple data centers agency are synchronous.Each core agent by pair
This agency stores the periodic scan of information, finds the data of virtual machine to be migrated in time, and act on behalf of with remote data center
Between to carry out data synchronous.Transmission process can use the existing File Synchronization tool etc. for having the functions such as breakpoint transmission.
4) across the data center migration of virtual machine: target data center creates new virtual machine instance, at target data center
Share operating system mirror image is generated in shared storage and adds independent delta file, by the data of the information record of local agent storage
Field unzips it to obtain the delta file of target virtual machine, and the delta file of target virtual machine is replaced new virtual machine reality
Then the delta file of example restarts new virtual machine instance, complete target virtual machine in the recovery at target data center.
In the present embodiment, when target data center creates new virtual machine instance, the local agent period at target data center
Property the stored information record of scanning, if it find that the flag value of certain record is 1 and dlocation field in information record
Value is that notebook data center indicates, then starts creation virtual machine process.Based on mirror image name in step 1) it is assumed that creating virtual machine
Operating system mirror image unique identifier used by virtual machine is image_id in the process.After virtual machine creating success, in sheet
Also there can be { base { image in the shared storage of the heartid},instnewTwo files, instnewFor new virtual machine instance
Delta file.The virtual machine state of the new virtual machine instance created is detected, when virtual machine creating success, to creation
Successful virtual machine delta file is replaced, i.e., the delta file of target virtual machine is replaced to the increment text of new virtual machine instance
Part instnewFile content.After file is replaced successfully, virtual machine is carried out by the rebuild tool that system virtualization is supported
Restart, completes the recovery of entire virtual machine.
5) virtual machine (vm) migration post-processes: the local agent at target data center deletes the information record, and notifies to be deleted
Except the local agent of the corresponding source data center of slocation field in information record deletes corresponding information record.
In conclusion across the data center virtual machine migration method under the present embodiment cloud computing environment does not need shared data
Support, but need to shut down and carry out data transmission, take a long time consuming, but for virtual machine with the need of personnel
It asks and can satisfy requirement completely.Across data center virtual machine migration method under the present embodiment cloud computing environment can also be further
Existing internal storage state simultaneous techniques can be cooperated, step 4) restore complete virtual machine after, can with original virtual machine into
Row internal storage data is synchronous, further decreases the virtual machine service break period.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (3)
1. across the data center virtual machine migration method under a kind of cloud computing environment, it is characterised in that step includes:
1) mirror site of operating system is established, operating system mirror image needed for creation virtual machine is stored in the mirror site；When
When user creates virtual machine instance based on the operating system mirror image in mirror site, by the operating system mirror image of virtual machine instance at this
It is stored in the form of share operating system mirror image adds independent delta file in the shared storage of ground data center；It is in office
Source data center of anticipating receives the migrating target virtual machine to target data center from source data center of operator's transmission
Across data center virtual machine (vm) migration instruction after, jump execute step 2)；
2) source data center registers the information of target virtual machine to local agent, the local generation of each source data center
Reason maintenance has the record of the information across data center's virtual machine to be migrated, and the information record includes following field informations；
<image_id,user_id,instance_id,slocation,dlocation,data,flag>
Wherein, image_id is the mirror image unique identifier of target virtual machine, and user_id is the unique identification of user in system
Symbol, instance_id are the unique identifier of virtual machine instance, and slocation is the identifier of source data center,
Dlocation is the identifier at target data center, and data indicates the compressed data of the delta file of target virtual machine, and flag is
Data synchronous regime, flag be 0 indicate synchronize it is unfinished, flag be 1 expression data synchronously complete；
3) source data center carries out periodic scan to the information record that local agent is registered, if what certain information recorded
The identifier of dlocation field and source data center is inconsistent and flag value is 0, then log-on data remote synchronization mechanism, will
This information recording synchronism to the corresponding target data center of dlocation field local agent；After synchronously completing, source data
Center, target data center set 1 for the flag value of the information record of local agent storage respectively；
4) target data center creates new virtual machine instance, generates share operating system in the shared storage at target data center
Mirror image adds independent delta file, unzips it the data field of the information record of local agent storage to obtain destination virtual
The delta file of machine, and the delta file of target virtual machine is replaced to the delta file of new virtual machine instance, then restart
New virtual machine instance completes target virtual machine in the recovery at target data center；
5) local agent at target data center deletes the information record, and notifies to be deleted slocation in information record
The local agent of the corresponding source data center of field deletes corresponding information record.
2. across the data center virtual machine migration method under cloud computing environment according to claim 1, which is characterized in that step
It is rapid 1) described in mirror site each operating system mirror image pass through < image_id, iamge_name, image_des, image_
Url > field is described, and wherein image_id is unique mark of operating system mirror image, and image_name is operating system mirror
The title of picture, image_des are the description information of operating system mirror image, and image_url is the storage location of operating system mirror image.
3. across the data center virtual machine migration method under cloud computing environment according to claim 1, which is characterized in that step
It is rapid 1) in by the operating system mirror image of virtual machine instance in the shared storage of local data center use share operating system mirror
As when the form of independent delta file being added to be stored, the storage organization form of all operating system mirror images is shown below；
In above formula, base indicates operating system mirror imageCommon ground content, inst11And inst12Table
Show share operating system mirror imageTwo virtual machine instances delta file, inst21It indicates to use operating system mirror imageVirtual machine instance delta file, instnmIt indicates to use operating system mirror imageM-th of virtual machine it is real
The delta file of example, n are operating system mirror image quantity, and m is share operating system mirror imageVirtual machine instance quantity.
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| CN109842636A (en) * | 2017-11-24 | 2019-06-04 | 阿里巴巴集团控股有限公司 | Cloud service moving method, device and electronic equipment |
| CN109597671B (en) * | 2018-12-11 | 2022-06-10 | 国云科技股份有限公司 | Desktop cloud implementation method compatible with centralized and distributed operation |
| CN110069319B (en) * | 2019-04-15 | 2023-05-02 | 南京信息工程大学 | Multi-target virtual machine scheduling method and system for cloud resource management |
| CN112269759B (en) * | 2020-10-23 | 2023-12-22 | 北京浪潮数据技术有限公司 | Migration method and related device for shared file storage |
| CN112887140B (en) * | 2021-01-25 | 2022-02-11 | 中国科学院沈阳自动化研究所 | Multi-cloud collaborative network-cut-off disaster recovery method |
| CN112948052B (en) * | 2021-02-23 | 2023-10-13 | 中国联合网络通信集团有限公司 | Virtual machine migration method across data centers, data center and computer medium |
| CN113268312B (en) * | 2021-05-14 | 2022-08-02 | 济南浪潮数据技术有限公司 | Application migration method and system |
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