WO2016078422A1

WO2016078422A1 - Virtual machine configuration information storage method and apparatus

Info

Publication number: WO2016078422A1
Application number: PCT/CN2015/083282
Authority: WO
Inventors: 魏治安
Original assignee: 华为技术有限公司
Priority date: 2014-11-20
Filing date: 2015-07-03
Publication date: 2016-05-26
Also published as: CN104461687B; CN104461687A

Abstract

A virtual machine configuration information storage method and apparatus, which can reduce the dependence on a management node, and enable virtual machine configuration information to be still available when the management node has a failure. The storage method comprises: acquiring, by a disk array, virtual machine configuration information about a virtual machine (VM) and a logical unit number (LUN) of a logical disk where a virtual disk corresponding to the VM is located (S201); and writing, by the disk array, the virtual machine configuration information into a control information region corresponding to the logical disk according to the LUN (S202). The present invention is applicable to the technical field of computers.

Description

Method and device for storing virtual machine configuration information

The present application claims priority to Chinese Patent Application No. 201410668433.4, entitled "Storage Method and Apparatus for Virtual Machine Configuration Information", filed on November 20, 2014, the entire contents of which are incorporated by reference. In this application.

Technical field

The present invention relates to the field of computer technologies, and in particular, to a method and an apparatus for storing virtual machine configuration information.

Background technique

In recent years, with the development of cloud computing, virtualization technology, which is one of its basic supporting technologies, has also been widely used. Virtualization technology is a decoupling technology that separates the underlying hardware devices from the upper operating system and applications. It can run multiple virtual machines simultaneously on a single physical host, greatly improving resource utilization and allocation flexibility. At the same time, compared with the traditional physical computer, the virtual machine has better isolation and encapsulation. It can save the information of the entire virtual machine to the virtual disk, so that the virtual machine can be conveniently snapshotted, backed up, cloned and Distribution and other operations.

Currently, there are two main implementations of the existing storage virtualization technology: one is through the virtual disk image file on the virtual machine file system; the other is through the raw device mapping (RDM) disk. In the above two schemes, since the virtual disk data and the virtual machine configuration information required to start the virtual machine are separately saved, the virtual disk data is saved in the logical disk, and the virtual machine configuration information is saved in the management node. Therefore, when a single point of failure occurs on the management node, the virtual machine configuration information cannot be accessed, and the virtual machine cannot be started.

Summary of the invention

The embodiment of the present invention provides a method and a device for storing virtual machine configuration information, so as to at least solve the problem that the virtual machine configuration information cannot be accessed due to the failure of the management node in the prior art, and the dependency on the management node can be reduced. Virtual machine configuration information is still available when the node fails.

In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:

In a first aspect, a method for storing virtual machine configuration information is provided, where the method includes:

Obtaining the virtual machine configuration information of the virtual machine VM and the logical unit number LUN of the logical disk where the virtual disk corresponding to the VM is located;

According to the LUN, the logical disk writes the virtual machine configuration information into a control information area corresponding to the logical disk.

In a first possible implementation manner of the first aspect, in combination with the first aspect, the acquiring the virtual machine configuration information of the virtual machine VM and the logical unit number LUN of the logical disk where the virtual disk corresponding to the VM is located includes:

Receiving a write request message, the write request message carrying the virtual machine configuration information and the LUN;

Obtaining the virtual machine configuration information and the LUN according to the write request message.

In a second possible implementation manner of the first aspect, in combination with the first possible implementation manner of the first aspect, the receiving a write request message includes:

Receiving the write request message sent by a small computer system interface SCSI in-band command;

or,

The write request message sent by the control management interface provided by the storage system is received.

In a third possible implementation manner of the first aspect, in combination with the first aspect to the second possible implementation manner of the first aspect, the virtual machine configuration information is written to the logical disk according to the LUN Before the corresponding control information area, it also includes:

Determining, in the control information area corresponding to the logical disk, whether virtual machine configuration information different from the virtual machine configuration information is stored;

If yes, the virtual machine configuration information different from the virtual machine configuration information is deleted.

In a fourth possible implementation manner of the first aspect, in combination with the first aspect, after the virtual machine configuration information is written in the control information area corresponding to the logical disk according to the LUN, the method further includes:

Receiving a delete request message, where the delete request message is used to delete the virtual machine configuration information in a control information area corresponding to the logical disk;

And deleting the virtual machine configuration information according to the deletion request message.

In the prior art, since the virtual disk data and the virtual machine configuration information are separately saved, the virtual disk data is saved in the logical disk, and the virtual machine configuration information is saved in the management node. Therefore, when the management node has a single point of failure, the virtual machine configuration information cannot be made. Access, and thus the relationship between the virtual machine and the logical disk where the virtual disk of the virtual machine is located cannot be known, and the virtual machine cannot be started. The storage method of the virtual machine configuration information provided by the embodiment of the present invention stores the virtual machine configuration information in the control information area of the logical disk. Therefore, even if the management node has a single point of failure, the virtual disk of the virtual machine can still be accessed. The control information area of the logical disk realizes access to the virtual machine configuration information. According to the virtual machine configuration information and the virtual disk data of the virtual machine, the virtual machine can be started normally. That is, the storage method of the virtual machine configuration information provided by the embodiment of the present invention can reduce the dependency on the management node, and the virtual machine configuration information is still available when the management node fails.

A second aspect provides a method for storing virtual machine configuration information, where the method includes:

Sending the virtual machine configuration information and the LUN to the disk array, and the disk array writes the virtual machine configuration information into a control information area corresponding to the logical disk according to the LUN.

In a first possible implementation manner of the second aspect, in combination with the second aspect, the sending the virtual machine configuration information and the LUN to the disk array includes:

Sending a write request message to the disk array, the write request message carrying the virtual machine configuration information and the LUN.

In a second possible implementation manner of the second aspect, in combination with the first possible implementation manner of the second aspect, the sending a write request message to the disk array includes:

Transmitting the write request message to the disk array by a small computer system interface SCSI in-band command;

or,

The write request message is sent to the disk array through a control management interface provided by the storage system.

In a third possible implementation manner of the second aspect, in combination with the second aspect, after the sending the virtual machine configuration information and the LUN to the disk array, the method further includes:

And sending a delete request message to the disk array, where the delete request message is used to delete the virtual machine configuration information in the control information area corresponding to the logical disk.

In the prior art, since the virtual disk data and the virtual machine configuration information are separately saved, the virtual disk data is saved in the logical disk, and the virtual machine configuration information is saved in the management node. in. Therefore, when a single point of failure occurs on the management node, the virtual machine configuration information cannot be accessed, and the corresponding relationship between the virtual machine and the logical disk where the virtual disk of the virtual machine resides cannot be obtained. Eventually, the virtual machine cannot be started. The virtual machine configuration information is stored in the control information area of the logical disk according to the storage method of the virtual machine configuration information provided by the embodiment of the present invention. Therefore, even if the management node has a single point of failure, the virtual disk of the virtual machine can still be accessed. The control information area of the logical disk enables access to the virtual machine configuration information. According to the virtual machine configuration information and the virtual disk data of the virtual machine, the virtual machine can be started normally. That is, the storage method of the virtual machine configuration information provided by the embodiment of the present invention can reduce the dependency on the management node, and the virtual machine configuration information is still available when the management node fails.

In a third aspect, a disk array is provided, the disk array includes: an acquiring unit, and a writing unit;

The acquiring unit is configured to acquire virtual machine configuration information of the virtual machine VM and a logical unit number LUN of the logical disk where the virtual disk corresponding to the VM is located;

The writing unit is configured to write the virtual machine configuration information into a control information area corresponding to the logical disk according to the LUN.

In a first possible implementation manner of the third aspect, in combination with the third aspect, the acquiring unit includes: a receiving module, and an acquiring module;

The receiving module is configured to receive a write request message, where the write request message carries the virtual machine configuration information and the LUN;

The obtaining module is configured to acquire the virtual machine configuration information and the LUN according to the write request message.

In a second possible implementation manner of the third aspect, in combination with the first possible implementation manner of the third aspect, the receiving module is specifically configured to:

or,

In a third possible implementation manner of the third aspect, in combination with the second possible implementation manner of the third aspect to the third aspect, the disk array further includes: a determining unit, and a first deleting unit;

The determining unit is configured to:

Before the writing unit writes the virtual machine configuration information to the control information area corresponding to the disk array according to the LUN, determining whether the virtual machine configuration is stored in the control information area corresponding to the logical disk Different virtual machine configuration information;

The first deleting unit is configured to: if the determining unit determines that the virtual machine configuration information different from the virtual machine configuration information is stored in the control information area corresponding to the logical disk, deleting the virtual machine configuration information Different virtual machine configuration information.

In a fourth possible implementation manner of the third aspect, in combination with the third aspect, the disk array further includes: a receiving unit, and a second deleting unit;

The receiving unit is configured to: after the writing unit writes the virtual machine configuration information into a control information area corresponding to the logical disk according to the LUN, receive a delete request message, where the delete request message is used Instructing to delete the virtual machine configuration information in the control information area corresponding to the logical disk;

The second deleting unit is configured to delete the virtual machine configuration information according to the deletion request message.

In the prior art, since the virtual disk data and the virtual machine configuration information are separately saved, the virtual disk data is saved in the logical disk, and the virtual machine configuration information is saved in the management node. Therefore, when a single point of failure occurs on the management node, the virtual machine configuration information cannot be accessed, and the corresponding relationship between the virtual machine and the logical disk where the virtual disk of the virtual machine resides cannot be obtained. As a result, the virtual machine cannot be started. The logical disk provided by the embodiment of the present invention stores the virtual machine configuration information in the control information area of the logical disk. Therefore, even if the management node has a single point of failure, the logical disk of the virtual disk can be accessed by the virtual disk. The information area enables access to virtual machine configuration information. According to the virtual machine configuration information and the virtual disk data of the virtual machine, the virtual machine can be started normally. That is, the logical disk provided by the embodiment of the present invention can reduce the dependency on the management node, and the virtual machine configuration information is still available when the management node fails.

A fourth aspect provides a storage device for virtual machine configuration information, where the device includes: an acquiring unit, and a first sending unit;

The first sending unit is configured to send the virtual machine configuration information and the LUN to a disk array according to the LUN, where the virtual machine configuration information is used by the disk array Write the control information area corresponding to the logical disk.

In a first possible implementation manner of the fourth aspect, in combination with the fourth aspect, the first sending unit includes: a sending module;

The sending module is configured to send a write request message to the disk array, where the write request message carries the virtual machine configuration information and the LUN.

In a second possible implementation manner of the fourth aspect, in combination with the first possible implementation manner of the fourth aspect, the sending module is specifically configured to:

or,

In a third possible implementation manner of the fourth aspect, in combination with the fourth aspect, the device further includes: a second sending unit;

The second sending unit is configured to send a delete request message to the disk array after the first sending unit sends the virtual machine configuration information and the LUN to the disk array, where the delete request message is used Instructing to delete the virtual machine configuration information in the control information area corresponding to the logical disk.

In the prior art, since the virtual disk data and the virtual machine configuration information are separately saved, the virtual disk data is saved in the logical disk, and the virtual machine configuration information is saved in the management node. Therefore, when a single point of failure occurs on the management node, the virtual machine configuration information cannot be accessed, and the corresponding relationship between the virtual machine and the logical disk where the virtual disk of the virtual machine resides cannot be obtained. Eventually, the virtual machine cannot be started. The storage device of the virtual machine configuration information provided by the embodiment of the present invention stores the virtual machine configuration information in the control information area of the logical disk. Therefore, even if the management node has a single point of failure, the virtual disk of the virtual machine can still be accessed. The control information area of the logical disk enables access to the virtual machine configuration information. According to the virtual machine configuration information and the virtual disk data of the virtual machine, the virtual machine can be started normally. That is, the storage device of the virtual machine configuration information provided by the embodiment of the present invention can reduce the dependency on the management node, and the virtual machine configuration information is still available when the management node fails.

DRAWINGS

1 is a schematic diagram of a virtual machine system architecture;

2 is a schematic flowchart 1 of a method for storing virtual machine configuration information according to an embodiment of the present invention;

FIG. 3 is a second schematic flowchart of a method for storing virtual machine configuration information according to an embodiment of the present disclosure;

4 is a schematic flowchart 3 of a method for storing virtual machine configuration information according to an embodiment of the present invention;

FIG. 5 is a schematic flowchart 4 of a method for storing virtual machine configuration information according to an embodiment of the present disclosure;

FIG. 6 is a schematic flowchart 5 of a method for storing virtual machine configuration information according to an embodiment of the present disclosure;

FIG. 7 is a schematic flowchart 1 of a method for reading configuration information of a virtual machine according to an embodiment of the present disclosure;

FIG. 8 is a second schematic flowchart of a method for reading configuration information of a virtual machine according to an embodiment of the present disclosure;

FIG. 9 is a schematic diagram of a process for reading virtual machine configuration information by using a virtual machine configuration information reading method according to an embodiment of the present disclosure;

FIG. 10 is a schematic diagram 1 of a remote storage disaster recovery backup method according to an embodiment of the present invention;

Figure 11 is a schematic diagram of disaster recovery backup through a hypervisor or a third-party device;

12 is a schematic diagram of performing disaster recovery backup through a disk array;

13 is a schematic diagram of a remote storage disaster recovery backup method in the prior art;

FIG. 14 is a schematic structural diagram 1 of a disk array according to an embodiment of the present disclosure;

FIG. 15 is a schematic structural diagram 2 of a disk array according to an embodiment of the present disclosure;

FIG. 16 is a schematic structural diagram 3 of a disk array according to an embodiment of the present disclosure;

FIG. 17 is a schematic structural diagram 4 of a disk array according to an embodiment of the present disclosure;

FIG. 18 is a schematic structural diagram 1 of a storage device for configuring virtual machine configuration information according to an embodiment of the present disclosure;

FIG. 19 is a schematic structural diagram 2 of a storage device for configuring virtual machine configuration information according to an embodiment of the present disclosure;

FIG. 20 is a schematic diagram of a storage device for configuring virtual machine configuration information according to an embodiment of the present invention; Figure 3 is constructed.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

In order to facilitate the understanding of the embodiments of the present invention, several terms introduced in the description of the embodiments of the present invention are first introduced herein:

Virtual Machine (VM): Virtual machine software can simulate one or more virtual computers on a physical host. These virtual machines work like real computers, and can be installed on virtual machines. Systems and applications, virtual machines also have access to network resources. For an application running in a virtual machine, the virtual machine is like a real computer.

Hypervisor: An intermediate layer of software running between the underlying physical server and the operating system that allows multiple operating systems and applications to share hardware. All physical devices on the server, including disk and memory, can be accessed. When the underlying physical server starts and executes the hypervisor, it loads the operating systems of all virtual machines and allocates the appropriate amount of memory, CPU, network, and disk to each virtual machine.

Logical disk: A logical storage unit that divides storage space according to prior planning and functions on a physical storage device. It should be understood that a logical disk is not equal to a specific device, but a logical storage unit. Each logical disk has a corresponding Logical Unit Number (LUN) to identify the logical disk. One or more logical disks can form a virtual machine file system to hold virtual disk data of the virtual machine.

Next, a schematic diagram of a virtual machine system architecture is shown. As shown in FIG. 1, the virtual machine 10, the hypervisor 11, the management node 12, and the logical disk 131 on the disk array 13 are provided. The virtual disk data is stored in the logical disk 131, and the virtual machine configuration information is stored in the management node 12. When the management node 12 fails in a single point, the virtual machine configuration information stored in the management node 12 is lost, and the information about the virtual disk storage location in the virtual machine configuration information is also lost, so that the virtual information cannot be learned. The correspondence between the machine and the logical disk where the virtual disk of the virtual machine resides, and thus the virtual machine cannot be started.

It should be understood that the embodiment of the present invention may be applied to a virtualization platform such as xen or KVM, and may also be applied to any virtualization platform that needs to store and read virtual machine configuration information. limit.

Embodiment 1

The embodiment of the invention provides a method for storing virtual machine configuration information, as shown in FIG. 2, which includes:

S201. The disk array acquires the virtual machine configuration information of the VM and the LUN of the logical disk where the virtual disk corresponding to the VM is located.

S202. The disk array writes the virtual machine configuration information to the control information area corresponding to the logical disk according to the LUN.

The virtual machine configuration information refers to the attribute information of the virtual machine, such as the name of the virtual machine, the virtual device information, and the disk storage characteristic information. Generally, considering the versatility and variability, the virtual machine configuration information can be divided into three parts for storage, see Table-1.

Table 1

General information

Virtualization vendor customization information

Store vendor customization information

The general information refers to the general information of the virtual machine that is not related to the manufacturer, such as the Universally Unique Identifier (UUID) of the virtual machine, the name of the virtual machine, the name of the guest operating system (Guest OS), and the central processing unit of the virtual machine. (Central Processing Unit, CPU) specifications, virtual machine memory specifications, etc.; virtualization vendor custom information refers to virtual machine information defined by the virtualization vendor, such as virtual machine related feature information, virtual machine virtual device information, virtual machine state information The storage vendor-defined information refers to the virtual machine information defined by the storage vendor, such as virtual machine disk storage feature information, virtual machine disk snapshot information, and virtual machine disk image information.

It should be noted that, under the existing storage electrical protocol, each logical disk includes two areas of a control information area and a user data area. The information of the logical disk is stored in the control information area, such as the LUN of the logical disk, the name, the storage device to which it belongs, and the user data area stores the data specified by the user. Typically, users can access and manage data in the user data area without having the authority to manage data in the control information area. Therefore, storing the virtual machine configuration information in the control information area can prevent the user from modifying the virtual machine configuration information; in addition, the data of the control information area is relatively less than the data of the user data area, and therefore, the virtual machine configuration information is stored. Virtual machine configuration can be implemented in the control information area Quick search for information.

Preferably, as shown in FIG. 3, in the method for storing the virtual machine configuration information provided by the embodiment of the present invention, the disk array acquires the virtual machine configuration information of the VM and the LUN of the logical disk where the virtual disk corresponding to the VM is located (step S201). Specifically, the method may include:

S201a. The disk array receives a write request message, where the write request message carries virtual machine configuration information and a LUN.

S201b and the disk array acquire the virtual machine configuration information and the LUN according to the write request message.

The write request message may be sent by the Hypervisor, or may be sent by a third-party device, or may be sent by another disk array, which is not specifically limited in this embodiment of the present invention.

It should be noted that the write request message may be specifically used to add virtual machine configuration information, that is, when the virtual machine configuration information is not stored in the control information area of the logical disk, the disk array receives the write request message, and the write request message Obtain virtual machine configuration information and LUNs, and write virtual machine configuration information to the control information area of the logical disk according to the LUN, to add virtual machine configuration information in the logical disk control information area; the write request message may also be used for updating The virtual machine configuration information, that is, when the virtual machine configuration information is stored in the control information area of the logical disk, the disk array receives the write request message, obtains the virtual machine configuration information and the LUN from the write request message, and according to the LUN, The virtual machine configuration information is written in the control information area corresponding to the logical disk to cover the original virtual machine configuration information in the logical disk control information area, and the virtual machine configuration information in the logical disk control information area is updated. This embodiment of the present invention does not specifically limit this.

Preferably, in the method for storing the virtual machine configuration information provided by the embodiment of the present invention, the disk array receives the write request message (step S201a), which may specifically include:

The disk array receives a write request message sent via a Small Computer System Interface (SCSI) in-band command.

or,

The disk array receives a write request message sent through a control management interface provided by the storage system.

Further, as shown in FIG. 4, in the method for storing virtual machine configuration information provided by the embodiment of the present invention, before the disk array writes the virtual machine configuration information to the control information area corresponding to the logical disk according to the LUN (step S202) Can also include:

S203. The disk array determines whether virtual machine configuration information different from the virtual machine configuration information is stored in a control information area corresponding to the logical disk.

S204. If yes, the disk array deletes virtual machine configuration information different from the virtual machine configuration information.

That is, if the logical disk cannot achieve the data coverage, after the disk array receives the write request message, if it is determined that the virtual machine configuration information different from the virtual machine configuration information is stored in the control information area corresponding to the logical disk, it needs to be deleted first. The virtual disk configuration information in the information area is different from the virtual machine configuration information, and then the virtual machine configuration information carried in the write request message is written into the control information area, which is not specifically limited in this embodiment of the present invention. .

Preferably, as shown in FIG. 5, in the method for storing virtual machine configuration information provided by the embodiment of the present invention, after the disk array writes the virtual machine configuration information to the control information area corresponding to the logical disk (step S202), include:

S205. The disk array receives the delete request message, where the delete request message is used to delete the virtual machine configuration information in the control information area corresponding to the logical disk.

S206. The disk array deletes the virtual machine configuration information according to the delete request message.

In this way, when the virtual machine configuration information in the logical disk is not required, the virtual machine configuration information can be deleted to reduce the occupation of the control information area of the logical disk and release the storage space of the control information area of the logical disk in time.

The method for storing the configuration information of the virtual machine provided by the embodiment of the present invention, the disk array first acquires the virtual machine configuration information of the VM and the LUN of the logical disk where the virtual disk corresponding to the VM is located, and then writes the virtual machine configuration information to the logical disk according to the LUN. Corresponding control information area. In the prior art, since the virtual disk data and the virtual machine configuration information are separately saved, the virtual disk data is saved in the logical disk, and the virtual machine configuration information is saved in the management node. Therefore, when a single point of failure occurs on the management node, the virtual machine configuration information cannot be accessed, and the corresponding relationship between the virtual machine and the logical disk where the virtual disk of the virtual machine resides cannot be obtained. As a result, the virtual machine cannot be started. The storage method of the virtual machine configuration information provided by the embodiment of the present invention stores the virtual machine configuration information in the control information area of the logical disk. Therefore, even if the management node has a single point of failure, the virtual disk of the virtual machine can still be accessed. The control information area of the logical disk realizes access to the virtual machine configuration information. According to the virtual machine configuration information and the virtual disk data of the virtual machine, the virtual machine can be started normally. That is, the method for storing virtual machine configuration information provided by the embodiment of the present invention can reduce the dependency on the management node. Lay, the virtual machine configuration information is still available when the management node fails.

Embodiment 2

An embodiment of the present invention provides a method for storing virtual machine configuration information, as shown in FIG. 6, which includes:

S601. Obtain VM configuration information of the VM and a LUN of the logical disk where the virtual disk corresponding to the VM is located.

S602: Send the virtual machine configuration information and the LUN to the disk array, and the disk array writes the virtual machine configuration information to the control information area corresponding to the logical disk according to the LUN.

It should be noted that, in the embodiment of the present invention, the foregoing storage method may be performed by a hypervisor, may be performed by a third-party device, or may be performed by a disk array in which a logical disk storing the virtual machine configuration information is located, and is implemented by the present invention. This example does not specifically limit this.

Preferably, in the method for storing the configuration information of the virtual machine provided by the embodiment of the present invention, the configuration information of the virtual machine and the LUN are sent to the disk array, which may include:

A write request message is sent to the disk array, and the write request message carries the virtual machine configuration information and the LUN.

It should be noted that the write request message may be used to newly add virtual machine configuration information, that is, when the virtual machine configuration information is not stored in the control information area of the logical disk, the write request message is sent to the disk array, and the disk array is The virtual machine configuration information and the LUN are obtained in the write request message, and the virtual machine configuration information is written into the control information area of the logical disk according to the LUN, so that the virtual machine configuration information is added in the logical disk control information area; the write request message is further It can be used to update the virtual machine configuration information, that is, when the virtual machine configuration information is stored in the control information area of the logical disk, the write request message is sent to the disk array, and the disk array obtains the virtual machine configuration information from the write request message. And the LUN, and the virtual machine configuration information is written to the control information area corresponding to the logical disk according to the LUN, so as to overwrite the original virtual machine configuration information in the logical disk control information area, and update the virtual machine configuration information in the logical disk control information area.

Preferably, in the method for storing the configuration information of the virtual machine provided by the embodiment of the present invention, the sending the write request message to the disk array may include:

A write request message is sent to the disk array via the small computer system interface SCSI in-band command.

or,

A write request message is sent to the disk array through a control management interface provided by the storage system.

Preferably, after the virtual machine configuration information and the LUN are sent to the disk array, the method for storing the virtual machine configuration information provided by the embodiment of the present invention may further include:

The delete request message is sent to the disk array, and the delete request message is used to delete the virtual machine configuration information in the control information area corresponding to the logical disk.

The method for storing the configuration information of the virtual machine provided by the embodiment of the present invention, by acquiring the virtual machine configuration information of the VM and the LUN of the logical disk where the virtual disk corresponding to the VM is located, sends the virtual machine configuration information and the LUN to the disk array, and then the disk. The array writes the VM configuration information to the control information area corresponding to the logical disk according to the LUN. In the prior art, since the virtual disk data and the virtual machine configuration information are separately saved, the virtual disk data is saved in the logical disk, and the virtual machine configuration information is saved in the management node. Therefore, when a single point of failure occurs on the management node, the virtual machine configuration information cannot be accessed, and the corresponding relationship between the virtual machine and the logical disk where the virtual disk of the virtual machine resides cannot be obtained. Eventually, the virtual machine cannot be started. The storage method of the virtual machine configuration information provided by the embodiment of the present invention stores the virtual machine configuration information in the control information area of the logical disk. Therefore, even if the management node has a single point of failure, the virtual disk of the virtual machine can still be accessed. The control information area of the logical disk realizes access to the virtual machine configuration information. According to the virtual machine configuration information and the virtual disk data of the virtual machine, the virtual machine can be started normally. That is, the storage method of the virtual machine configuration information provided by the embodiment of the present invention can reduce the dependency on the management node, and the virtual machine configuration information is still available when the management node fails.

Embodiment 3

An embodiment of the present invention provides a method for reading configuration information of a virtual machine, as shown in FIG. 7, which includes:

S701. Obtain a LUN of a logical disk where the virtual disk corresponding to the VM is located.

S702. The virtual machine configuration information pre-stored in the control information area corresponding to the logical disk is read according to the LUN.

It should be noted that, in the embodiment of the present invention, the foregoing reading method may be performed by the hypervisor, or may be performed by a third-party device, or may be a disk other than the disk array where the logical disk storing the virtual machine configuration information is located. The array is executed, and the embodiment of the present invention does not Be specifically limited.

Preferably, in the method for reading the configuration information of the virtual machine provided by the embodiment of the present invention, the LUN of the logical disk in which the virtual disk corresponding to the VM is located is obtained (step S701), which may specifically include:

Obtain the LUN of the logical disk where the virtual disk corresponding to the VM on the SCSI is located.

Specifically, a host bus adapter (HBA) can be used to obtain a list of LUNs of all logical disks on the SCSI. According to the list and the identifier of the VM, the logical disk where the virtual disk corresponding to the VM is located can be obtained. LUN. Of course, the LUN can be specified by the user, that is, the LUN of the logical disk is given by the user, which is not specifically limited in this embodiment of the present invention.

Further, as shown in FIG. 8 , in the method for reading the configuration information of the virtual machine provided by the embodiment of the present invention, the virtual machine configuration information pre-stored in the control information area corresponding to the logical disk is read according to the LUN (step S702). Before, you can also include:

S703. Send a first request message to the disk array where the logical disk is located according to the LUN, where the first request message requests to read the virtual machine configuration information.

S704: Receive a request confirmation message sent by the disk array where the logical disk is located, and request a confirmation message to indicate that the virtual machine configuration information is allowed to be read.

That is, after the disk array where the logical disk is located allows the virtual machine configuration information to be read, the virtual machine configuration information is read. In this way, it is possible to prevent multiple devices from simultaneously reading the virtual machine configuration information of the logical disk and conflicting to ensure that the device can obtain the virtual machine configuration information; on the other hand, read again if the disk array where the logical disk is located allows The virtual machine configuration information ensures the security of the virtual machine configuration information.

Further, in the method for reading virtual machine configuration information provided by the embodiment of the present invention, the virtual machine configuration information includes a VM identifier of the VM.

Then, after the virtual machine configuration information pre-stored in the control information area corresponding to the logical disk is read according to the LUN (step S702), the method may further include:

Mount the virtual disk to the VM based on the VM ID.

Further, in the method for reading the configuration information of the virtual machine provided by the embodiment of the present invention, after the virtual disk is mounted to the VM according to the VM identifier, the method further includes:

Start the VM based on the virtual machine configuration information.

That is, after the virtual disk is mounted to the corresponding VM, it can be based on the control letter of the logical disk. The virtual machine configuration information pre-stored in the interest area starts the VM.

Preferably, in the method for reading the configuration information of the virtual machine provided by the embodiment of the present invention, before the VM is started according to the configuration information of the virtual machine, the method further includes:

A second request message is received, the second request message requesting to start the VM.

Then, the VM is started according to the virtual machine configuration information, and specifically includes:

The VM is started according to the second request message and the virtual machine configuration information.

That is, after the virtual disk is mounted to the corresponding VM, the VM may not be started yet, but after confirming that the request to start the VM is received, the VM is started according to the virtual machine configuration information stored in advance in the control information area of the logical disk.

It should be noted that, in the prior art, when a single point of failure occurs on the management node, the configuration information of the virtual machine saved in the management node is lost, and the information about the storage location of the virtual disk in the virtual machine configuration information is also lost. As a result, the correspondence between the virtual machine and the logical disk where the virtual disk of the virtual machine is located cannot be known, and the virtual machine cannot be started. In this case, to start the virtual machine normally, you must restore the mapping between the management node and the logical disk where the virtual machine and the virtual disk of the virtual machine reside. This process often requires a lot of manual operations. If the virtual machine configuration information is pre-stored in the control information area corresponding to the logical disk, after the single-point failure of the management node, the hypervisor can read the virtual machine configuration information stored in the control information area by using the command (see Figure 9). ), the virtual machine configuration information can still be obtained, and the virtual disk data is obtained according to the virtual machine configuration information, and the virtual machine is started normally.

The method for reading the configuration information of the virtual machine provided by the embodiment of the present invention obtains the LUN of the logical disk where the virtual disk corresponding to the VM is located, and then reads the virtual machine configuration pre-stored in the control information area corresponding to the logical disk according to the LUN. information. In the prior art, since the virtual disk data and the virtual machine configuration information are separately saved, the virtual disk data is saved in the logical disk, and the virtual machine configuration information is saved in the management node. Therefore, when a single point of failure occurs on the management node, the virtual machine configuration information cannot be accessed, and the corresponding relationship between the virtual machine and the logical disk where the virtual disk of the virtual machine resides cannot be obtained. As a result, the virtual machine cannot be started. The method for reading the configuration information of the virtual machine provided by the embodiment of the present invention, because the virtual machine configuration information is pre-stored in the control information area of the logical disk, even if the management node has a single point of failure, the virtual machine can still be accessed. The control information area of the logical disk where the virtual disk resides enables access to the virtual machine configuration information, and then the virtual machine is started normally according to the virtual machine configuration information and the virtual disk data of the virtual machine. That is, the method for reading the configuration information of the virtual machine provided by the embodiment of the present invention can reduce the dependency on the management node and is lost in the management node. The virtual machine configuration information is still available when it is valid.

Embodiment 4

The embodiment of the present invention provides a method for storing and reading virtual machine configuration information according to the foregoing embodiment of the present invention, and the method for performing disaster recovery is as follows:

1. Before disaster recovery:

Referring to FIG. 10, when the disaster side 11 has not failed, the information about the virtual machine stored in the logical disk in the disaster side 11 needs to be backed up to the corresponding logical disk in the disaster recovery side 12. Specifically, the information about the virtual machine stored in the logical disk 1 of the disaster side 11 is backed up to the logical disk 4 of the disaster recovery side 12 as an example: as shown in FIG. 11, first, by a hypervisor or a third-party device. The method for reading the configuration information of the virtual machine provided by the third embodiment of the present invention reads the virtual machine configuration information in the control information area of the logical disk 1; and then, the virtual machine provided by the first embodiment and the second embodiment of the present invention The storage method of the configuration information stores the virtual machine configuration information in the control information area of the logical disk 4. Of course, the virtual machine configuration information can be directly read from the logical disk 1 by using the method provided by the third embodiment of the present invention, and the virtual machine configuration information can be written by the method provided in the first embodiment of the present invention. Enter the control information area as shown in Figure 12. This embodiment of the present invention does not specifically limit this.

In addition, it is necessary to back up the virtual disk data stored in the user data area of the logical disk in the disaster side 11 to the user data area of the corresponding logical disk in the disaster recovery side 12 before the recovery of the disaster recovery. The embodiment of the invention is not specifically limited thereto.

2. Disaster recovery:

The hypervisor on the disaster recovery side obtains the configuration information of the virtual machine in the logical disk on the disaster recovery side by using the method provided in the third embodiment of the present invention; determining the virtual machine to which the virtual machine configuration information belongs according to the VM identifier in the virtual machine configuration information, and virtualizing The disk is mounted to the corresponding virtual machine; in turn, the virtual machine can be started according to the virtual machine configuration information.

In the prior art, when a remote storage disaster recovery backup is performed, the LUN of the logical disk changes. Referring to FIG. 13, for example, on the disaster side 11, the virtual disk data of the VM1 is stored in the logical disk 1. After the backup, on the disaster recovery side 12, the virtual disk data of the VM1 is backed up to the logical disk 4, and the LUN of the logical disk 1 It is different from the LUN of logical disk 4. The VM configuration information of the VM1 stored in the management node B of the disaster recovery side 12 is copied from the management node A of the disaster side 11, and therefore, the virtual machine configuration information of VM1 in the management node B is virtualized by VM1. The disk data is stored in logical disk 1. In fact, on the disaster recovery side 12, the virtual disk data of VM1 is stored in the logical disk 4. Therefore, on the disaster recovery side 12, the logical disk of the virtual machine and the virtual disk of the virtual machine cannot be associated. At this time, it is necessary to re-establish the correspondence between the virtual disk of the virtual machine and the virtual disk of the virtual machine at the management node, and this operation is time consuming and laborious.

When the remote disaster recovery is performed by using the storage and reading method of the virtual machine configuration information provided by the embodiment of the present invention, the hypervisor on the disaster recovery side can directly obtain the virtual machine configuration information by using the naming on the tape, according to the virtual information in the virtual machine configuration information. Machine ID, you can know which virtual machine the virtual disk data stored in the logical disk belongs to. That is, when the recovery and recovery of the virtual machine configuration information provided by the embodiment of the present invention is performed, the virtual disk of the virtual machine and the virtual machine can be obtained without performing data recovery on the disaster recovery side management node. The correct correspondence of logical disks. Compared with the prior art, the disaster recovery method provided by the embodiment of the present invention saves a large number of recovery operations. After a fault occurs on the disaster side, the virtual machine can be quickly started to ensure that the virtual machine can be used normally.

Embodiment 5

The embodiment of the present invention provides a disk array 140 for performing a method for storing virtual machine configuration information provided by the first embodiment of the present invention. Specifically, as shown in FIG. 14, the method includes: an obtaining unit 1401 and a writing unit 1402.

The obtaining unit 1401 is configured to acquire virtual machine configuration information of the VM and a LUN of the logical disk where the virtual disk corresponding to the VM is located.

The writing unit 1402 is configured to write the virtual machine configuration information into the control information area corresponding to the logical disk 140 according to the LUN.

Preferably, as shown in FIG. 15, in the disk array 140 provided by the embodiment of the present invention, the obtaining unit 1401 specifically includes: a receiving module 1401a, and an obtaining module 1401b.

The receiving module 1401a is configured to receive a write request message, where the write request message carries virtual machine configuration information and a LUN.

The obtaining module 1401b is configured to obtain virtual machine configuration information and a LUN according to the write request message.

It should be noted that the write request message may be sent by the Hypervisor, or may be sent by a third-party device, or may be sent by another disk array, which is not specifically limited in this embodiment of the present invention.

Preferably, in the disk array 140 provided by the embodiment of the present invention, the receiving module 1401a is specifically configured to:

A write request message sent by a SCSI in-band command is received.

or,

A write request message sent through a control management interface provided by the storage system is received.

Further, as shown in FIG. 16, the disk array 140 provided by the embodiment of the present invention may further include: a determining unit 1403, and a first deleting unit 1404.

The determining unit 1403 is configured to determine, before the writing unit 1402 writes the virtual machine configuration information to the control information area corresponding to the logical disk 140 according to the LUN, whether the virtual machine is stored in the control information area corresponding to the logical disk 140. Configure virtual machine configuration information with different information.

The first deleting unit 1404 is configured to: if the determining unit 1403 determines that the virtual machine configuration information different from the virtual machine configuration information is stored in the control information area corresponding to the logical disk, delete the virtual machine configuration information different from the virtual machine configuration information. .

That is, if the disk array cannot implement data coverage, after the disk array receives the write request message, if it is determined that the virtual machine configuration information different from the virtual machine configuration information is stored in the control information area corresponding to the logical disk, it needs to be deleted first. The virtual disk configuration information in the information area is different from the virtual machine configuration information, and then the virtual machine configuration information carried in the write request message is written into the control information area, which is not specifically limited in this embodiment of the present invention. .

Preferably, as shown in FIG. 17, the disk array 140 provided by the embodiment of the present invention may further include: a receiving unit 1405, and a second deleting unit 1406.

The receiving unit 1405 is configured to: after the writing unit 1402 writes the virtual machine configuration information to the control information area corresponding to the logical disk according to the LUN, and receives a deletion request message, where the deletion request message is used to indicate that the corresponding control of the logical disk 140 is deleted. Virtual machine configuration information in the information area.

The second deleting unit 1406 is configured to delete the virtual machine configuration information according to the deletion request message.

In the logical disk provided by the embodiment of the present invention, the virtual machine of the VM is first acquired by the obtaining unit. Set the information and the LUN of the logical disk where the virtual disk corresponding to the VM is located. Then, the write unit writes the virtual machine configuration information to the control information area corresponding to the logical disk according to the LUN. In the prior art, since the virtual disk data and the virtual machine configuration information are separately saved, the virtual disk data is saved in the logical disk, and the virtual machine configuration information is saved in the management node. Therefore, when a single point of failure occurs on the management node, the virtual machine configuration information cannot be accessed, and the corresponding relationship between the virtual machine and the logical disk where the virtual disk of the virtual machine resides cannot be obtained. As a result, the virtual machine cannot be started. The logical disk provided by the embodiment of the present invention stores the virtual machine configuration information in the control information area of the logical disk. Therefore, even if the management node has a single point of failure, the logical disk of the virtual disk can be accessed by the virtual disk. The information area enables access to virtual machine configuration information. According to the virtual machine configuration information and the virtual disk data of the virtual machine, the virtual machine can be started normally. That is, the logical disk provided by the embodiment of the present invention can reduce the dependency on the management node, and the virtual machine configuration information is still available when the management node fails.

Embodiment 6

The embodiment of the present invention provides a storage device 180 for storing virtual machine configuration information, which is used to perform the method for reading the configuration information of the virtual machine provided by the second embodiment of the present invention. Specifically, as shown in FIG. 18, the method includes: acquiring unit 1801 and A transmitting unit 1802.

The obtaining unit 1801 is configured to acquire virtual machine configuration information of the VM and a LUN of the logical disk where the virtual disk corresponding to the VM is located.

The first sending unit 1802 is configured to send the virtual machine configuration information and the LUN to the disk array, and the virtual machine configuration information is written by the disk array to the control information area corresponding to the logical disk.

It should be noted that the storage device 180 of the virtual machine configuration information may be a hypervisor or a third-party device, or may be a disk array in which the logical disk storing the virtual machine configuration information is located, which is in the embodiment of the present invention. This is not specifically limited.

Preferably, as shown in FIG. 19, in the storage device 180 of the virtual machine configuration information provided by the embodiment of the present invention, the first sending unit 1802 may include: a sending module 1802a.

The sending module 1802a is configured to send a write request message to the disk array, where the write request message carries the virtual machine configuration information and the LUN.

Preferably, the sending module 1802a is specifically configured to:

A write request message is sent to the disk array via a SCSI in-band command.

Or,

Preferably, as shown in FIG. 20, the storage device 180 of the virtual machine configuration information provided by the embodiment of the present invention may further include: a second sending unit 1803.

The second sending unit 1803 is configured to send a delete request message to the disk array after the first sending unit 1802 sends the virtual machine configuration information and the LUN to the disk array, where the delete request message is used to indicate that the control information area corresponding to the logical disk is deleted. Virtual machine configuration information.

In the storage device of the virtual machine configuration information provided by the embodiment of the present invention, the acquiring unit acquires the virtual machine configuration information of the VM and the LUN of the logical disk where the virtual disk corresponding to the VM is located, and the virtual device configuration information is configured by the first sending unit. The LUN is sent to the disk array, and then the virtual machine configuration information is written by the disk array to the control information area corresponding to the logical disk. In the prior art, since the virtual disk data and the virtual machine configuration information are separately saved, the virtual disk data is saved in the logical disk, and the virtual machine configuration information is saved in the management node. Therefore, when a single point of failure occurs on the management node, the virtual machine configuration information cannot be accessed, and the corresponding relationship between the virtual machine and the logical disk where the virtual disk of the virtual machine resides cannot be obtained. Eventually, the virtual machine cannot be started. The storage device of the virtual machine configuration information provided by the embodiment of the present invention stores the virtual machine configuration information in the control information area of the logical disk. Therefore, even if the management node has a single point of failure, the virtual disk of the virtual machine can still be accessed. The control information area of the logical disk enables access to the virtual machine configuration information. According to the virtual machine configuration information and the virtual disk data of the virtual machine, the virtual machine can be started normally. That is, the storage device of the virtual machine configuration information provided by the embodiment of the present invention can reduce the dependency on the management node, and the virtual machine configuration information is still available when the management node fails.

It will be clearly understood by those skilled in the art that, for convenience and brevity of description, the above described device is only illustrated by the division of the above functional modules. In practical applications, the above functions may be assigned differently according to needs. The function module is completed, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. For the specific working process of the system, the device and the unit described above, refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other manners. For example, the device embodiment described above For example, the division of the module or unit is only a logical function division, and the actual implementation may have another division manner, for example, multiple units or components may be combined or integrated into another system. Or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, or all or part of the technical solution, may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) or a processor to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims

A method for storing virtual machine configuration information, the method comprising:

Obtaining the virtual machine configuration information of the virtual machine VM and the logical unit number LUN of the logical disk where the virtual disk corresponding to the VM is located;

And writing, according to the LUN, the virtual machine configuration information to a control information area corresponding to the logical disk.
The method according to claim 1, wherein the acquiring the virtual machine configuration information of the virtual machine VM and the logical unit number LUN of the logical disk where the virtual disk corresponding to the VM is located includes:

Receiving a write request message, the write request message carrying the virtual machine configuration information and the LUN;

Obtaining the virtual machine configuration information and the LUN according to the write request message.
The method of claim 2, wherein the receiving a write request message comprises:

Receiving the write request message sent by a small computer system interface SCSI in-band command;

or,

The write request message sent by the control management interface provided by the storage system is received.
The method according to any one of claims 1-3, wherein before the writing the virtual machine configuration information to the control information area corresponding to the logical disk according to the LUN, the method further includes:

Determining, in the control information area corresponding to the logical disk, whether virtual machine configuration information different from the virtual machine configuration information is stored;

If yes, the virtual machine configuration information different from the virtual machine configuration information is deleted.
The method according to claim 1, wherein after the virtual machine configuration information is written in the control information area corresponding to the logical disk according to the LUN, the method further includes:

Receiving a delete request message, where the delete request message is used to delete the virtual machine configuration information in a control information area corresponding to the logical disk;

And deleting the virtual machine configuration information according to the deletion request message.
A method for storing virtual machine configuration information, the method comprising:

Obtaining the virtual machine configuration information of the virtual machine VM and the logical unit number LUN of the logical disk where the virtual disk corresponding to the VM is located;

Sending the virtual machine configuration information and the LUN to the disk array, and the disk array writes the virtual machine configuration information into the control information area corresponding to the logical disk according to the LUN.
The method according to claim 6, wherein the sending the virtual machine configuration information and the LUN to the disk array comprises:

Sending a write request message to the disk array, the write request message carrying the virtual machine configuration information and the LUN.
The method according to claim 7, wherein the sending a write request message to the disk array comprises:

Transmitting the write request message to the disk array by a small computer system interface SCSI in-band command;

or,

The write request message is sent to the disk array through a control management interface provided by the storage system.
The method of claim 6, further comprising: after the sending the virtual machine configuration information and the LUN to the disk array,

And sending a delete request message to the disk array, where the delete request message is used to delete the virtual machine configuration information in the control information area corresponding to the logical disk.
A disk array, comprising: an acquiring unit, and a writing unit;

The acquiring unit is configured to acquire virtual machine configuration information of the virtual machine VM and a logical unit number LUN of the logical disk where the virtual disk corresponding to the VM is located;

The writing unit is configured to write the virtual machine configuration information into a control information area corresponding to the logical disk according to the LUN.
The disk array according to claim 10, wherein the obtaining unit comprises: a receiving module, and an acquiring module;

The receiving module is configured to receive a write request message, where the write request message carries the virtual machine configuration information and the LUN;

The obtaining module is configured to acquire the virtual machine configuration information and the LUN according to the write request message.
The disk array according to claim 11, wherein the receiving module is specifically configured to:

Receiving the write request message sent by a small computer system interface SCSI in-band command;

or,

The write request message sent by the control management interface provided by the storage system is received.
The disk array according to any one of claims 10 to 12, wherein the disk array further comprises: a determining unit, and a first deleting unit;

The determining unit is configured to:

Before the writing unit writes the virtual machine configuration information to the control information area corresponding to the logical disk according to the LUN, determining whether the virtual machine configuration is stored in the control information area corresponding to the logical disk Different virtual machine configuration information;

The first deleting unit is configured to: if the determining unit determines that the virtual machine configuration information different from the virtual machine configuration information is stored in the control information area corresponding to the logical disk, deleting the virtual machine configuration information Different virtual machine configuration information.
The disk array according to claim 10, wherein the disk array further comprises: a receiving unit, and a second deleting unit;

The receiving unit is configured to: after the writing unit writes the virtual machine configuration information into a control information area corresponding to the logical disk according to the LUN, receive a delete request message, where the delete request message is used Instructing to delete the virtual machine configuration information in the control information area corresponding to the logical disk;

The second deleting unit is configured to delete the virtual machine configuration information according to the deletion request message.
A storage device for configuring virtual machine information, the device comprising: an acquiring unit, and a first sending unit;

The acquiring unit is configured to acquire virtual machine configuration information of the virtual machine VM and a logical unit number LUN of the logical disk where the virtual disk corresponding to the VM is located;

The first sending unit is configured to send the virtual machine configuration information and the LUN to a disk array, and the virtual machine configuration information is written by the disk array into a control information area corresponding to the logical disk.
The apparatus according to claim 15, wherein the first sending unit comprises: a sending module;

The sending module is configured to send a write request message to the disk array, where the write request message carries the virtual machine configuration information and the LUN.
The device according to claim 16, wherein the sending module is specifically configured to:

Transmitting the write request message to the disk array by a small computer system interface SCSI in-band command;

or,

The write request message is sent to the disk array through a control management interface provided by the storage system.
The device according to claim 15, wherein the device further comprises: a second sending unit;

The second sending unit is configured to send a delete request message to the disk array after the first sending unit sends the virtual machine configuration information and the LUN to the disk array, where the delete request message is used Instructing to delete the virtual machine configuration information in the control information area corresponding to the logical disk.