CN107688484A - A kind of method and system of virtual machine (vm) migration - Google Patents

Abstract

The present application discloses a method for migrating a virtual machine, including: installing the operating system of the virtual machine on a system disk; wherein, the system disk is obtained by the first controller by connecting to the system hard disk pool; The data is stored in a data disk; wherein, the data disk is obtained by connecting the first controller to the data hard disk pool; when a virtual machine migration instruction is detected, the operation of the virtual machine is stopped, and the second controller is logged in to connect to the system Hard disk pool; use the virtual machine image in the system hard disk pool to start the virtual machine and mount the data disk; this method can realize fast migration of virtual machines and maintain load balance of data storage services; this application also discloses a A virtual machine migration system has the above beneficial effects.

Description

Method and system for virtual machine migration

technical field

The invention relates to the field of data storage, in particular to a method and system for virtual machine migration.

Background technique

With the rapid development of science and technology, data storage technology plays an important role in human production and life, and people pay more and more attention to data storage technology.

For a virtualization platform running on multiple controllers, multiple virtual machines will run concurrently on each controller. When the virtual machines on one of the controllers occupy more CPU and memory resources, you need to migrate some of the virtual machines on the controller to another controller to achieve load balancing.

In the prior art, by copying the virtual machine image on the source controller to the destination controller, first stop the virtual machine on the source controller, then copy the virtual machine image to the destination controller, and load the virtual machine image on the destination controller to start the virtual machine. However, the migration speed of this virtual machine migration technology is relatively slow, which affects the progress of related businesses.

Therefore, how to implement fast migration of virtual machines is a technical problem that those skilled in the art need to solve.

Contents of the invention

The purpose of the present application is to provide a method and system for virtual machine migration, which can realize fast migration of virtual machines and maintain load balance of data storage services.

In order to solve the above technical problems, the present application provides a method for virtual machine migration, the method comprising:

Installing the operating system of the virtual machine to the system disk; wherein, the system disk is obtained by the first controller by connecting to the system hard disk pool;

storing the business data of the virtual machine in a data disk; wherein, the data disk is obtained by connecting the first controller to a data hard disk pool;

When a virtual machine migration instruction is detected, stop the operation of the virtual machine, and log in to the second controller to connect to the system hard disk pool;

The virtual machine image in the system hard disk pool is used to start the virtual machine and mount the data disk.

Optionally, when a virtual machine migration instruction is detected, stopping the running of the virtual machine, and logging into the second controller to connect to the system hard disk pool includes:

When detecting the virtual machine migration instruction, stop the running of the virtual machine, and shut down the first controller;

judging whether the remaining CPU and memory of the second controller meet the specifications of the virtual machine;

If yes, log in to the second controller to connect to the system hard disk pool through iSCSI.

Optionally, also include:

When the virtual machine starts, the virtual machine automatically mounts the data disk.

The present application also provides a virtual machine migration system, the system comprising:

The system installation module is used to install the operating system of the virtual machine to the system disk; wherein, the system disk is obtained by the first controller by connecting to the system hard disk pool;

A data storage module, configured to store the business data of the virtual machine in a data disk; wherein, the data disk is obtained by connecting the first controller to a data hard disk pool;

A system migration module, configured to stop the operation of the virtual machine when a virtual machine migration instruction is detected, and log in to the second controller to connect to the system hard disk pool;

The data migration module is configured to use the virtual machine image in the system hard disk pool to start the virtual machine and mount the data disk.

Optionally, the system migration module includes:

a termination unit, configured to stop the operation of the virtual machine and shut down the first controller when the virtual machine migration instruction is detected;

a judging unit, configured to judge whether the remaining CPU and memory of the second controller meet the specification of the virtual machine;

A linking unit, configured to log in to the second controller to connect to the system hard disk pool through iSCSI when the CPU and the memory meet the specification of the virtual machine.

Optionally, also include:

The automatic mounting module is used for automatically mounting the data disk by the virtual machine when the virtual machine is started.

The present invention provides a method for migrating a virtual machine. The operating system of the virtual machine is installed on a system disk; wherein, the system disk is obtained by the first controller by connecting to the system hard disk pool; and the business data of the virtual machine is stored To a data disk; wherein, the data disk is obtained by connecting the first controller to the data hard disk pool; when a virtual machine migration command is detected, stop the operation of the virtual machine, and log in to the second controller to connect to the system hard disk pool ; Use the virtual machine image in the system hard disk pool to start the virtual machine and mount the data disk.

The method realizes the separation of the operating system of the virtual machine and the business data by installing the operating system of the virtual machine on the system disk and storing the business data of the virtual machine on the data disk. When the virtual machine is migrated, only the second controller needs to be connected to the system disk through iSCSI to start the virtual machine directly, without copying the virtual machine image file. This method can realize rapid migration of virtual machines and maintain load balance of data storage services. The present application also provides a system for migrating a virtual machine, which has the above beneficial effects, and will not be repeated here.

Description of drawings

In order to illustrate the embodiments of the present application more clearly, the following will briefly introduce the accompanying drawings used in the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. As far as people are concerned, other drawings can also be obtained based on these drawings on the premise of not paying creative work.

FIG. 1 is a flowchart of a method for migrating a virtual machine provided in an embodiment of the present application;

FIG. 2 is a flowchart of another method for migrating a virtual machine provided by an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a virtual machine migration system provided by the present application.

detailed description

In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

Please refer to FIG. 1 below. FIG. 1 is a flowchart of a method for migrating a virtual machine provided in an embodiment of the present application;

Specific steps can include:

Step S101: Install the operating system of the virtual machine to the system disk; wherein, the system disk is obtained by the first controller by connecting to the system hard disk pool;

Among them, this solution is based on the basis that both controllers carrying the virtual machine can be connected to the storage device through the network, and the hard disk of the storage device is divided into a system hard disk pool and a data hard disk pool. There are many ways to connect the first controller carrying the virtual machine to the system hard disk pool. Generally speaking, the iSCSI (Internet Small Computer System Interface, network small computer system interface) technology can be used to connect to the system hard disk pool to obtain the system disk. iSCSI technology is a SCSI instruction set used by hardware devices that can run on the upper layer of the IP protocol. This instruction set can implement the SCSI (Small Computer System Interface, small computer system interface) protocol on the IP network, enabling it to Routing over, for example, high-speed Gigabit Ethernet. iSCSI technology is a new storage technology that combines the existing SCSI interface with Ethernet technology to enable servers to exchange data with storage devices using IP networks.

After the above analysis, the first controller connects to the system hard disk pool to obtain the system disk, and installs the operating system of the virtual machine to the system disk. It can be understood that the system disk may already exist before the operating system is installed, that is, one system disk may install the operating systems of multiple virtual machines. It can be understood that there can be many kinds of virtual machine operating systems, such as Windows, Linux, etc., and there are not many virtual machine operating systems to be specifically limited here, and any virtual machine operating system can be applied to this The operations mentioned in the steps.

It is worth noting that in general, the space occupied by the operating system of the virtual machine will be smaller than the size of the system disk, but because the space of the virtual machine operating system that the system disk can accommodate is also limited, and there may be a system disk that hosts multiple virtual machines. machine condition. Therefore, before installing the operating system of the virtual machine to the system disk, it may be determined whether the remaining space of the system disk can accommodate another operating system of the virtual machine to be installed. Therefore, a judging step may be set before this step to judge whether the system disk has enough space to install the operating system.

Step S102: storing the business data of the virtual machine in a data disk; wherein, the data disk is obtained by connecting the first controller to a data hard disk pool;

Wherein, this step is basically the same as step S101, except that the business data is stored in the data disk in this step. Similarly, the data disk obtained by connecting the first controller to the data disk pool may be that the first controller connects to the data disk pool through iSCSI technology to obtain the data disk. Because the virtual machine will generate a large amount of business data when performing related services (for example, when the virtual machine is used for data collection, video shooting and other services, the image file is very huge, generally in GB (Gigabyte, gigabyte) or even TB (Terabyte, terabyte, or megabyte) is used as a unit for data file storage, so generally speaking, the space required for business data is much larger than the space required for installing the operating system. Therefore, the data disk Much larger than the system disk.

Since both the system disk and the data disk are obtained by dividing the hard disk of the storage device, attention should be paid to the division ratio when dividing the hard disk of the storage device. It should be noted that the change of the size of the operating system of each virtual machine is not very obvious, but the storage of business data is carried out frequently and the total amount of business data storage is very large. Therefore, the specific operation of dividing the hard disk of the storage device can be selected by those skilled in the art according to the specific application scenario of the solution, and no specific limitation is made here.

Step S103: When a virtual machine migration instruction is detected, stop the running of the virtual machine, and log in to the second controller to connect to the system hard disk pool;

Wherein, since multiple virtual machines are running on each controller at the same time, when a virtual machine of one of the controllers runs and occupies more CPU and memory resources, it is necessary to execute a related instruction of virtual machine migration (ie, a virtual machine migration instruction). It can be understood that the virtual machine migration instruction may be an instruction sent automatically when it is detected that the controller cannot host the virtual machine, or it may be an instruction sent artificially by relevant technical personnel after analyzing the working condition of the controller. Of course, there are other instructions. As for the method of sending the virtual machine migration instruction, those skilled in the art can choose an appropriate method according to the actual application scenario of the solution.

Virtual machine migration means that the virtual machine is changed from being set up on the first controller to being set up on the second controller, which involves the migration of the operating system of the virtual machine and the migration of the business data of the virtual machine. When a virtual machine migration instruction is detected, it means that the virtual machine is no longer installed on the first controller. In order to avoid service failure, it is necessary to log in to the first controller to stop the running of the virtual machine before migrating the virtual machine. It can be understood that there are many methods for stopping the running of the virtual machine, and those skilled in the art can make a specific selection according to the actual application scenario of the solution.

In this step, log in to the second controller to connect to the system hard disk pool. By default, the remaining CPU and memory of the second controller can meet the relevant specifications of the virtual machine. Of course, it is also possible to determine whether the second controller satisfies relevant conditions before this step, and if the relevant conditions are met, migration can be performed, and if not, other controllers are selected for migration. Of course, it is also possible to screen all controllers before virtual machine migration and select a controller that satisfies relevant conditions as a controller waiting to perform migration-related operations. The selection method of the controller is not limited here, and those skilled in the art may select an appropriate method according to a specific application scenario of the solution.

Logging in to the second controller to connect to the system hard disk pool is to migrate the operating system of the virtual machine to the second controller. Since the function of automatically connecting to the iSCSI data disk is configured in the virtual machine, each time the virtual machine is started, it can automatically mount and connect to the virtual machine. machine's data disk.

Step S104: using the virtual machine image in the system hard disk pool to start the virtual machine and mount the data disk;

Wherein, as explained in step S103, since the function of automatically connecting the iSCSI data disk is configured in the virtual machine, each time the virtual machine is started, the data disk connected to the virtual machine can be automatically mounted. Log in to the second controller to connect to the system hard disk pool, and start the virtual machine through the virtual machine image in the hard disk pool. After the virtual machine is started, the data disk can be automatically mounted without transferring a large amount of business data.

Please refer to FIG. 2 below. FIG. 2 is a flow chart of another method for virtual machine migration provided by the embodiment of the present application;

Specific steps can include:

Step S201: Install the operating system of the virtual machine to the system disk; wherein, the system disk is obtained by the first controller by connecting to the system hard disk pool.

Step S202: Store the business data of the virtual machine in a data disk; wherein the data disk is obtained by connecting the first controller to a data hard disk pool.

Step S203: When the virtual machine migration instruction is detected, stop the running of the virtual machine, and shut down the first controller;

Step S204: judging whether the remaining CPU and memory of the second controller meet the specification of the virtual machine;

Among them, the standard for judging whether the remaining CPU and memory of the second controller meet the specifications of the virtual machine is determined according to the specific conditions of the data stored inside the virtual machine, that is to say, the related services performed by each virtual machine are different, and the stored business The size of the data is also different, and the size of the operating system will also be different, so the specification of the virtual machine is an uncertain amount. Before each migration, it is necessary to check whether the remaining CPU and memory of the target controller meet the specifications of the virtual machine. judge.

Step S205: If yes, log in to the second controller to connect to the system hard disk pool through iSCSI.

Step S206: Use the virtual machine image in the system hard disk pool to start the virtual machine and mount the data disk.

Please refer to FIG. 3, which is a schematic structural diagram of a virtual machine migration system provided by the present application;

The system can include:

The system installation module 100 is configured to install the operating system of the virtual machine to the system disk; wherein, the system disk is obtained by the first controller by connecting to the system hard disk pool;

The data storage module 200 is configured to store the business data of the virtual machine in a data disk; wherein, the data disk is obtained by connecting the first controller to a data hard disk pool;

The system migration module 300 is configured to stop the operation of the virtual machine when a virtual machine migration instruction is detected, and log in to the second controller to connect to the system hard disk pool;

The data migration module 400 is configured to use the virtual machine image in the system hard disk pool to start the virtual machine and mount the data disk.

In another embodiment of a virtual machine migration system provided in this application, the system migration module 300 includes:

a termination unit, configured to stop the operation of the virtual machine and shut down the first controller when the virtual machine migration instruction is detected;

a judging unit, configured to judge whether the remaining CPU and memory of the second controller meet the specifications of the virtual machine;

A linking unit, configured to log in to the second controller to connect to the system hard disk pool through iSCSI when the CPU and the memory meet the specification of the virtual machine.

Further, the system also includes:

The automatic mounting module is used for automatically mounting the data disk by the virtual machine when the virtual machine is started.

Since the embodiments of the system part correspond to the embodiments of the method part, please refer to the description of the embodiments of the method part for the embodiments of the system part, and details will not be repeated here.

Each embodiment in the description is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other. As for the system disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and for the related information, please refer to the description of the method part. It should be pointed out that those skilled in the art can make several improvements and modifications to the application without departing from the principles of the application, and these improvements and modifications also fall within the protection scope of the claims of the application.

It should also be noted that in this specification, relative terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that these entities or operations There is no such actual relationship or order between the operations. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

Claims (6)

1. A kind of 1. method of virtual machine (vm) migration, it is characterised in that including：

   The operating system of virtual machine is attached to system disk；Wherein, the system disk is hard by connecting system by the first controller Pan Chi is obtained；

   The business datum of the virtual machine is stored to data disks；Wherein, the data disks connect number by first controller Obtained according to hard disk pond；

   When detecting virtual machine (vm) migration instruction, stop the operation of virtual machine, and it is hard to log in the second controller connection system Pan Chi；

   The virtual machine and data disks described in carry are opened using the virtual machine image in the system disk pond.
2. 2. method according to claim 1, it is characterised in that it is described when detecting virtual machine (vm) migration instruction, stop virtual The operation of machine, and log in second controller and connect the system disk pond and include：

   When detecting the virtual machine (vm) migration instruction, stop the operation of the virtual machine, and close first controller；

   Judge whether the remaining CPU of the second controller and internal memory meet the specification of the virtual machine；

   If so, then log in the second controller connects the system disk pond by iSCSI.
3. 3. method according to claim 2, it is characterised in that also include：

   When the virtual machine starts, data disks described in the automatic carry of virtual machine.
4. A kind of 4. system of virtual machine (vm) migration, it is characterised in that including：

   System installs module, for the operating system of virtual machine to be attached into system disk；Wherein, the system disk is by the first control Device is obtained by connecting system disk pond；

   Data memory module, for the business datum of the virtual machine to be stored to data disks；Wherein, the data disks are by described First controller connection data hard disc pond obtains；

   System migration module, for when detecting virtual machine (vm) migration instruction, stopping the operation of virtual machine, and log in the second control Device connects the system disk pond；

   Data Migration module, for being opened using the virtual machine image in the system disk pond described in the virtual machine and carry Data disks.
5. 5. system according to claim 4, it is characterised in that the system migration module includes：

   Unit is terminated, for when detecting the virtual machine (vm) migration instruction, stopping the operation of the virtual machine, and described in closing First controller；

   Judging unit, for judging whether the remaining CPU of the second controller and internal memory meet the specification of the virtual machine；

   Link unit, for when the CPU and the internal memory meet the specification of the virtual machine, logging in second control Device processed connects the system disk pond by iSCSI.
6. 6. system according to claim 5, it is characterised in that also include：

   Automatic carry module, for when the virtual machine starts, data disks described in the automatic carry of virtual machine.