CN111352695B - Virtual machine migration method, device and computer readable storage medium - Google Patents
Virtual machine migration method, device and computer readable storage medium Download PDFInfo
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- CN111352695B CN111352695B CN201811578449.0A CN201811578449A CN111352695B CN 111352695 B CN111352695 B CN 111352695B CN 201811578449 A CN201811578449 A CN 201811578449A CN 111352695 B CN111352695 B CN 111352695B
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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
- G06F2009/45562—Creating, deleting, cloning virtual machine instances
-
- 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
- G06F2009/4557—Distribution of virtual machine instances; Migration and load balancing
Abstract
The disclosure provides a virtual machine migration method, a virtual machine migration device and a computer readable storage medium, and relates to the technical field of virtualization. The virtual machine migration method comprises the following steps: the source virtual machine pauses to accept the service and generates a recovery point; copying the data before the recovery point to a target host computer where the target virtual machine is located; sequentially iteratively copying the data generated in the data transmission process to a target host until a convergence condition is reached; and activating the target virtual machine and recovering the service according to the acquired data. By the method, the source virtual machine can be suspended to accept tasks when the execution of data migration is determined, so that the data change amount in the data migration process is reduced, the convergence speed is improved, and the virtual machine migration efficiency is improved.
Description
Technical Field
The disclosure relates to the technical field of virtualization, in particular to a virtual machine migration method, a virtual machine migration device and a computer readable storage medium.
Background
Virtualization is the process of virtualizing the same physical resource out of multiple versions of virtual resources that have the same physical resource characteristics. NFV (Virtual Network Function, virtual network element) is a software virtualized implementation of network functions that utilize virtualization technology to decouple network functions and hardware so that multiple different virtual network functions can be implemented by way of virtual machines on a standardized underlying network environment.
The online migration is a key technical link of virtualization, and in the online migration process, the normal operation of the application on the virtual machine needs to be ensured, and the virtual machine is moved from a source physical host to a destination physical host, so that the process should not have obvious influence on user experience.
Disclosure of Invention
The inventor finds that the transmission time of online migration in the related technology is longer, the online migration speed of the virtual machine is slower, and the online migration speed and the online migration mechanism in the related technology are used for users, especially in the mobile communication field which is different from the traditional IT calculation and is very sensitive to time delay and synchronization, and cannot meet the requirement of instantaneity.
An object of the present disclosure is to improve the efficiency of virtual machine migration.
According to one aspect of the present disclosure, a virtual machine migration method is provided, including: the source virtual machine pauses to accept the service and generates a recovery point; copying the data before the recovery point to a target host computer where the target virtual machine is located; sequentially iteratively copying the data generated in the data transmission process to a target host until a convergence condition is reached; and activating the target virtual machine and recovering the service according to the acquired data.
In some embodiments, iteratively copying data generated in the process of sending the data to the target host in turn until a convergence condition is reached includes: transmitting first data generated in the process of transmitting the data before the recovery point to the target host; transmitting second data generated in the process of transmitting the first data to a target host; and transmitting the nth data generated in the process of transmitting the nth-1 data to the target host until no data is generated in the process of transmitting the nth data.
In some embodiments, the virtual machine migration method further comprises: and creating a target virtual machine in the target host, and keeping the target virtual machine in a stop running state until the data of the source virtual machine is completely copied to the target host.
In some embodiments, the target virtual machine recovering the service according to the acquired data comprises: and after the target virtual machine finishes restoring the service data, the target virtual machine starts to restore the service execution from the restoring point according to the data after the restoring point.
In some embodiments, the virtual machine migration method further comprises: and when the convergence condition is reached, stopping the operation of the source virtual machine, and releasing the resources occupied by the source virtual machine.
In some embodiments, the data copied to the target virtual machine includes memory data and disk data of the source virtual machine.
By the method, the source virtual machine can be stopped to accept tasks when the online migration is determined to be executed, so that the data change amount in the data migration process is reduced, the convergence speed is improved, and the virtual machine migration efficiency is improved.
According to another aspect of the present disclosure, there is provided a virtual machine migration apparatus, including: the source virtual machine service control unit is configured to activate the source virtual machine to pause receiving service and generate a recovery point; the data copying unit is configured to copy the data before the recovery point to a target host computer where the target virtual machine is located, and sequentially iteratively copy the data generated in the data sending process to the target host computer until a convergence condition is reached; and the target virtual machine service control unit is configured to activate the target virtual machine and restore the service according to the acquired data.
In some embodiments, the data replication unit is configured to: copying the data before the recovery point to a target host computer where the target virtual machine is located; transmitting first data generated in the process of transmitting the data before the recovery point to the target host; transmitting second data generated in the process of transmitting the first data to a target host; and transmitting the nth data generated in the process of transmitting the nth-1 data to the target host until no data is generated in the process of transmitting the nth data.
In some embodiments, the virtual machine migration method further comprises: the target virtual machine generating unit is configured to establish a target virtual machine in the target host, and keep the target virtual machine in a stop running state until the data of the source virtual machine is completely copied to the target host.
In some embodiments, the target virtual machine traffic control unit is configured to: and after the control target virtual machine finishes restoring the service data, the control target virtual machine starts to restore the service execution from the restoring point according to the data after the restoring point.
In some embodiments, the source virtual machine service control unit is further configured to control the source virtual machine to stop running and release resources occupied by the source virtual machine after the data replication unit determines that the convergence condition is reached.
In some embodiments, the data copied to the target virtual machine includes memory data and disk data of the source virtual machine.
According to still another aspect of the present disclosure, there is provided a virtual machine migration apparatus, including: a memory; and a processor coupled to the memory, the processor configured to perform any one of the virtual machine migration methods described above based on instructions stored in the memory.
The virtual machine migration device can pause the source virtual machine from receiving tasks when determining to execute online migration, so that the data change amount in the data migration process is reduced, the convergence speed is improved, and the virtual machine migration efficiency is improved.
According to yet another aspect of the present disclosure, a computer-readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the steps of any one of the virtual machine migration methods above is presented.
By executing the instructions on the computer readable storage medium, the source virtual machine can be suspended to accept tasks when the online migration is determined to be executed, so that the data change amount in the data migration process is reduced, the convergence speed is improved, and the virtual machine migration efficiency is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate and explain the present disclosure, and together with the description serve to explain the present disclosure. In the drawings:
FIG. 1 is a flow chart of one embodiment of a virtual machine migration method of the present disclosure.
FIG. 2 is a flow chart of another embodiment of a virtual machine migration method of the present disclosure.
FIG. 3 is a schematic diagram of one embodiment of a virtual machine migration apparatus of the present disclosure.
Fig. 4 is a schematic diagram of another embodiment of a virtual machine migration apparatus of the present disclosure.
Fig. 5 is a schematic diagram of a further embodiment of a virtual machine migration apparatus of the present disclosure.
Detailed Description
The technical scheme of the present disclosure is described in further detail below through the accompanying drawings and examples.
A flowchart of one embodiment of a virtual machine migration method of the present disclosure is shown in fig. 1.
In step 101, the source virtual machine pauses accepting traffic, generating a resume point. The source virtual machine pauses the accepted traffic, which refers to the newly arrived traffic, and the execution of the traffic being processed that was accepted before the resume point is not affected.
In one embodiment, the source virtual machine may be triggered to generate a recovery point upon determining that virtual machine migration is to be performed. In another embodiment, a virtual machine in an unoperated state may be first established in the target host, and after the establishment is completed, the source virtual machine is triggered to generate a recovery point.
In step 102, the data of the source virtual machine before the recovery point is copied to the target host where the target virtual machine is located. The data before the recovery point includes memory data and disk data of the source virtual machine.
In step 103, the data generated in the process of sending the data is repeatedly copied to the target host in turn until the convergence condition is reached. After the iterative replication is completed, the source virtual machine is shut down. In one embodiment, the associated resources of the source virtual machine may be released.
In step 104, the target virtual machine is activated and service is restored based on the acquired data.
In the related online migration technology, an application program running on a virtual machine is not perceived and does not participate in the whole migration process, so that the generation quantity and speed of dirty data in the online migration process are high, the transmission time is long, and the online migration speed of the virtual machine is low.
By the method in the embodiment of the disclosure, the source virtual machine can be suspended to accept tasks when the online migration is determined to be executed, so that the data change amount in the data migration process is reduced, the convergence speed is improved, and the virtual machine migration efficiency is improved.
A flowchart of another embodiment of a virtual machine migration method of the present disclosure is shown in fig. 2.
In step 201, a target virtual machine is newly built in a target host, and the target virtual machine is controlled to maintain a stop running state.
In step 202, the source virtual machine pauses accepting the new service, generating a resume point.
In step 203, the data before the recovery point is copied to the target host where the target virtual machine is located. In transmitting the data before the resume point, the virtual machine pauses accepting the new task, but it is likely that some of the data will be generated. If it is determined that new data is generated, step 204 is performed.
In step 204, data generated in the process of transmitting data is transmitted to the target host.
In step 205, it is determined whether a convergence condition is reached. In one embodiment, the convergence condition refers to no new data being generated during the transmission of the data. If the convergence condition is reached, go to step 206; if the convergence condition is not reached, step 204 is performed.
In step 206, the target virtual machine restores the service data, and resumes the service execution from the restoration point according to the data after the restoration point.
By the method, the source virtual machine can be temporarily stopped to accept a new task after the virtual machine migration is determined, the generation amount of new data is reduced, and the convergence efficiency is improved, so that the data migration completion speed is increased, the iterative transmission times are reduced, the service pause time is shortened, and the user experience is improved; in addition, the target virtual machine can utilize the data generated after the recovery point to recover the service execution from the recovery point, so that the smooth connection of the executing service in the migration process is realized, and the user experience is further improved.
A schematic diagram of one embodiment of a virtual machine migration apparatus of the present disclosure is shown in fig. 3.
The source virtual machine service control unit 301 can trigger the source virtual machine to suspend accepting the service, and generate a resume point. The source virtual machine pauses the accepted traffic, which refers to the newly arrived traffic, and the execution of the traffic being processed that was accepted before the resume point is not affected. In one embodiment, the source virtual machine may be triggered to generate a recovery point upon determining that virtual machine migration is to be performed. In another embodiment, the virtual machine migration apparatus may further include a target virtual machine generating unit 304, capable of first establishing a virtual machine in an unoperated state in the target host, and activating the source virtual machine service control unit 301 after the establishment is completed to trigger the source virtual machine to generate a recovery point.
The data copying unit 302 can copy the data of the source virtual machine before the recovery point to the target host where the target virtual machine is located. And sequentially iteratively copying the data generated in the data transmission process to the target host until reaching the convergence condition. The data migrated to the target virtual machine includes memory data and disk data of the source virtual machine.
The target virtual machine service control unit 303 can activate the target virtual machine and resume the service according to the acquired data.
The virtual machine migration device can suspend the source virtual machine from receiving tasks when determining to execute data migration, so that the data change amount in the data migration process is reduced, the convergence speed is improved, and the virtual machine migration efficiency is improved.
In one embodiment, the data replication unit 302 may complete iterative data transmission according to the manner shown in the embodiment of fig. 2, and after determining that the virtual machine migration is executed, temporarily stop the source virtual machine from receiving a new task, so as to reduce the amount of new data generated and improve the convergence efficiency, thereby accelerating the data migration completion speed, reducing the number of iterative transmission times, shortening the time of service suspension, and improving the user experience.
In one embodiment, the target virtual machine service control unit 303 is further capable of starting to resume service execution from the resume point according to the data after the resume point after the service data is restored, so that the target virtual machine can utilize the data generated after the resume point to resume service execution from the resume point, and smooth connection of the executing service in the migration process is realized, and user experience is further improved.
A schematic structural diagram of one embodiment of a virtual machine migration apparatus of the present disclosure is shown in fig. 4. The virtual machine migration apparatus includes a memory 401 and a processor 402. Wherein: memory 401 may be a magnetic disk, flash memory, or any other non-volatile storage medium. The memory is used to store instructions in the corresponding embodiments of the virtual machine migration method above. Processor 402 is coupled to memory 401 and may be implemented as one or more integrated circuits, such as a microprocessor or microcontroller. The processor 402 is configured to execute instructions stored in a memory, which can improve virtual machine migration efficiency.
In one embodiment, virtual machine migration apparatus 500 may also include memory 501 and processor 502 as shown in FIG. 5. The processor 502 is coupled to the memory 501 via a BUS 503. The virtual machine migration apparatus 500 may also be connected to an external storage apparatus 505 through a storage interface 504 to invoke external data, and may also be connected to a network or another computer system (not shown) through a network interface 506. And will not be described in detail herein.
In this embodiment, the data instruction is stored in the memory, and then the processor processes the instruction, so that the migration efficiency of the virtual machine can be improved.
In another embodiment, a computer readable storage medium has stored thereon computer program instructions which, when executed by a processor, implement the steps of the method in the corresponding embodiments of the virtual machine migration method. It will be apparent to those skilled in the art that embodiments of the present disclosure may be provided as a method, apparatus, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the disclosure. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Thus far, the present disclosure has been described in detail. In order to avoid obscuring the concepts of the present disclosure, some details known in the art are not described. How to implement the solutions disclosed herein will be fully apparent to those skilled in the art from the above description.
The methods and apparatus of the present disclosure may be implemented in a number of ways. For example, the methods and apparatus of the present disclosure may be implemented by software, hardware, firmware, or any combination of software, hardware, firmware. The above-described sequence of steps for the method is for illustration only, and the steps of the method of the present disclosure are not limited to the sequence specifically described above unless specifically stated otherwise. Furthermore, in some embodiments, the present disclosure may also be implemented as programs recorded in a recording medium, the programs including machine-readable instructions for implementing the methods according to the present disclosure. Thus, the present disclosure also covers a recording medium storing a program for executing the method according to the present disclosure.
Finally, it should be noted that: the above embodiments are merely for illustrating the technical solution of the present disclosure and are not limiting thereof; although the present disclosure has been described in detail with reference to preferred embodiments, those of ordinary skill in the art will appreciate that: modifications may be made to the specific embodiments of the disclosure or equivalents may be substituted for part of the technical features; without departing from the spirit of the technical solutions of the present disclosure, it should be covered in the scope of the technical solutions claimed in the present disclosure.
Claims (12)
1. A virtual machine migration method, comprising:
the source virtual machine pauses the acceptance of the service and generates a resume point, wherein the execution of the service in process, which is accepted before the resume point, is not affected;
copying the data before the recovery point to a target host computer where the target virtual machine is located;
and sequentially iteratively copying the data generated in the data sending process to the target host until reaching a convergence condition, wherein the method comprises the following steps of: transmitting first data generated in the process of transmitting the data before the recovery point to the target host; transmitting second data generated in the process of transmitting the first data to the target host; transmitting the nth data generated in the process of transmitting the nth-1 data to the target host until no data is generated in the process of transmitting the nth data;
and activating the target virtual machine and recovering the service according to the acquired data.
2. The method of claim 1, further comprising:
and creating a target virtual machine in the target host, wherein the target virtual machine keeps a stop running state until the data of the source virtual machine is copied to the target host.
3. The method of claim 1, wherein the target virtual machine restoring traffic according to the acquired data comprises:
and after the target virtual machine finishes recovering the service data, starting to recover the service execution from the recovery point according to the data after the recovery point.
4. The method of claim 1, further comprising: and when the convergence condition is reached, stopping the operation of the source virtual machine, and releasing the resources occupied by the source virtual machine.
5. The method of claim 1, wherein the data copied to the target virtual machine comprises memory data and disk data of the source virtual machine.
6. A virtual machine migration apparatus, comprising:
a source virtual machine service control unit configured to activate the source virtual machine to suspend accepting the service and generate a resume point, wherein execution of the service under processing that has been accepted before the resume point is not affected;
the data copying unit is configured to copy the data before the recovery point to a target host computer where the target virtual machine is located; and sequentially iteratively copying the data generated in the data sending process to the target host until reaching a convergence condition, wherein the method comprises the following steps of: copying the data before the recovery point to a target host computer where the target virtual machine is located; transmitting first data generated in the process of transmitting the data before the recovery point to the target host; transmitting second data generated in the process of transmitting the first data to the target host; transmitting the nth data generated in the process of transmitting the nth-1 data to the target host until no data is generated in the process of transmitting the nth data;
and the target virtual machine service control unit is configured to activate the target virtual machine and restore service according to the acquired data.
7. The apparatus of claim 6, further comprising:
the target virtual machine generating unit is configured to create a target virtual machine in a target host, and keep the target virtual machine in a stop running state until the data of the source virtual machine is completely copied to the target host.
8. The apparatus of claim 6, wherein the target virtual machine traffic control unit is configured to: and controlling the target virtual machine to recover the service data, and starting to recover the service execution from the recovery point according to the data after the recovery point.
9. The apparatus of claim 6, wherein the source virtual machine service control unit is further configured to control the source virtual machine to stop running and release resources occupied by the source virtual machine after the data replication unit determines that a convergence condition is reached.
10. The apparatus of claim 6, wherein the data copied to the target virtual machine comprises memory data and disk data of the source virtual machine.
11. A virtual machine migration apparatus, comprising:
a memory; and
a processor coupled to the memory, the processor configured to perform the method of any of claims 1-5 based on instructions stored in the memory.
12. A computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the steps of the method of any of claims 1 to 5.
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