CN109656679A - A kind of the storage access method and device of virtual machine - Google Patents
A kind of the storage access method and device of virtual machine Download PDFInfo
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
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Abstract
This application provides the storage access methods and device of a kind of virtual machine, wherein, server log is the storage service of the network disk of virtual machine distribution and the identifier for obtaining network disk, is the virtual disk for the identifier that virtual machine creating has network disk based on network disk.The storage service of virtual machine logging in network disk after based on virtual disk start-up operation system later, it is then based on the identifier that network disk and virtual disk share, the storage access path for determining virtual machine includes the access path of network disk and the access path of virtual disk, the access path of virtual disk is main path, and the access path of network disk is standby path.The access path of network disk is switched to main path after detecting that server publishes the storage service of network disk by virtual machine later.It is possible thereby to only occupy a small amount of server resource in virtual machine startup stage to access virtual disk, virtual machine directly accesses network disk after virtual machine starting.
Description
Technical Field
The present application relates to the field of storage technologies, and in particular, to a storage access method and apparatus for a virtual machine.
Background
In a virtualized environment, the disks that a virtual machine can use are generally divided into two types: one is a virtual disk and the other is a network disk. At present, when a virtual machine accesses a virtual disk each time, a communication connection needs to be established with a server through a virtual network card, and then the server accesses the corresponding virtual disk. The access process can only realize the access to the virtual disk by the aid of the server, the access path is long, and more resources of the server need to be occupied. In order to shorten the access path and reduce the occupation of server resources, the virtual machine can directly log in the storage service of the network disk so as to realize the access to the network disk. Specifically, the virtual machine may log in a Storage service of the Network disk through a Storage Area Network (SAN) at a BIOS start stage, and then access the Network disk to start the BIOS from the Network disk.
However, the above-mentioned way of accessing the network disk by the virtual machine is affected by the technical specification of the BIOS, and the network storage protocol that can be supported is limited, and is only applicable to protocols such as Internet Small computer system Interface (iSCSI), Fibre Channel (FC), and the like, and is not applicable to some new network storage technologies, and the extensibility is poor.
Disclosure of Invention
In view of this, an object of the present application is to provide a method and an apparatus for accessing storage of a virtual machine, which can only occupy a small amount of server resources to access a virtual disk in a virtual machine starting stage, and after the virtual machine is started, the virtual machine directly accesses a network disk, so that the application range is relatively wide and the expandability is relatively good.
In a first aspect, the present application provides a storage access method for a virtual machine, which is applied to a server, where the server has a virtual machine created therein, and the method includes:
logging in storage service of a network disk allocated for the virtual machine and acquiring an identifier of the network disk;
creating a virtual disk with an identifier of the network disk for the virtual machine based on the network disk;
after determining that the virtual machine starts an operating system based on the virtual disk, indicating the virtual machine to log in a storage service of the network disk; the storage access path after the virtual machine logs in the storage service of the network disk comprises an access path of the network disk and an access path of the virtual disk, wherein the access path of the virtual disk is a main path, and the access path of the network disk is a standby path;
logging out the storage service of the network disk so that the virtual machine switches the access path of the network disk to a main path.
In a possible embodiment, the logging in the storage service of the network disk allocated to the virtual machine includes:
and acquiring the Internet Protocol (IP) address of the network disk and the name of the network disk, and logging in the storage service of the network disk based on the IP address and the name.
In one possible embodiment, the creating, for the virtual machine based on the network disk, a virtual disk having an identifier of the network disk includes:
creating the virtual disk with a temporary identifier in the network disk;
and modifying the temporary identifier of the virtual disk into the identifier of the network disk.
In one possible embodiment, the logging out of the storage service of the network disk includes:
and after receiving an unloading instruction which is sent by the virtual machine and used for indicating to unload the network disk, logging out the storage service of the network disk based on the IP address of the network disk and the name of the network disk.
In a possible implementation, after logging out the storage service of the network disk, the method further includes:
and deleting the configuration information of the virtual disk.
In a second aspect, the present application provides a storage access method for a virtual machine, which is applied to a virtual machine created on a server, and includes:
starting an operating system of the virtual machine based on the virtual disk; the virtual disk is created for the virtual machine by the server based on a network disk, and identifiers of the network disk and the virtual disk are consistent;
logging in the storage service of the network disk under the instruction of the server;
determining, based on the identifier shared by the network disk and the virtual disk, that a storage access path of the virtual machine includes an access path of the network disk and an access path of the virtual disk; the access path of the virtual disk is a main path, and the access path of the network disk is a standby path;
and switching the access path of the network disk to a main path after detecting that the server logs out the storage service of the network disk.
In one possible embodiment, the determining that the storage access path of the virtual machine includes an access path of the network disk and an access path of the virtual disk based on the identifier shared by the network disk and the virtual disk includes:
when the identifier shared by the network disk and the virtual disk is identified, determining the access path of the virtual disk as a main path and determining the access path of the network disk as a standby path by starting a multi-path service.
In a fourth aspect, the present application provides a storage access apparatus for a virtual machine, the apparatus comprising:
the acquisition module is used for logging in storage service of a network disk distributed for the virtual machine and acquiring an identifier of the network disk;
a creation module for creating a virtual disk having an identifier of the network disk for the virtual machine based on the network disk;
the indication module is used for indicating the virtual machine to log in the storage service of the network disk after determining that the virtual machine starts an operating system based on the virtual disk; the storage access path after the virtual machine logs in the storage service of the network disk comprises an access path of the network disk and an access path of the virtual disk, wherein the access path of the virtual disk is a main path, and the access path of the network disk is a standby path;
and the unloading module is used for logging out the storage service of the network disk so as to enable the virtual machine to switch the access path of the network disk into a main path.
In one possible design, when logging in the storage service of the network disk allocated to the virtual machine, the obtaining module is specifically configured to:
and acquiring the Internet Protocol (IP) address of the network disk and the name of the network disk, and logging in the storage service of the network disk based on the IP address and the name.
In one possible design, when the creating module creates, for the virtual machine, a virtual disk having an identifier of the network disk based on the network disk, the creating module is specifically configured to:
creating the virtual disk with a temporary identifier in the network disk;
and modifying the temporary identifier of the virtual disk into the identifier of the network disk.
In one possible design, when logging out the storage service of the network disk, the offload module is specifically configured to:
and after receiving an unloading instruction which is sent by the virtual machine and used for indicating to unload the network disk, logging out the storage service of the network disk based on the IP address of the network disk and the name of the network disk.
In one possible design, after logging out the storage service of the network disk, the offload module is further configured to:
and deleting the configuration information of the virtual disk.
In a fourth aspect, the present application further provides a storage access apparatus for a virtual machine, where the apparatus includes:
the starting module is used for starting an operating system of the virtual machine based on the virtual disk; the virtual disk is created for the device by the server based on a network disk, and identifiers of the network disk and the virtual disk are consistent;
the connection module is used for logging in the storage service of the network disk under the instruction of the server;
a determining module, configured to determine, based on the identifier shared by the network disk and the virtual disk, that a storage access path of the virtual machine includes an access path of the network disk and an access path of the virtual disk; the access path of the virtual disk is a main path, and the access path of the network disk is a standby path;
the switching module is configured to switch an access path of the network disk to a main path after detecting that the server logs out the storage service of the network disk.
In one possible design, when determining that the storage access path of the virtual machine includes an access path of the network disk and an access path of the virtual disk based on the identifier shared by the network disk and the virtual disk, the determining module is specifically configured to:
when the identifier shared by the network disk and the virtual disk is identified, determining the access path of the virtual disk as a main path and determining the access path of the network disk as a standby path by starting a multi-path service.
In a fifth aspect, an embodiment of the present application further provides an electronic device, including: a processor, a memory and a bus, wherein the memory stores machine-readable instructions executable by the processor, the processor and the memory communicate via the bus when the electronic device is running, and the machine-readable instructions, when executed by the processor, perform the steps of the method for memory access of a virtual machine according to the first aspect or any possible implementation manner of the first aspect.
In a sixth aspect, an embodiment of the present application further provides an electronic device, including: a processor, a memory and a bus, the memory storing machine-readable instructions executable by the processor, the processor and the memory communicating via the bus when the electronic device is running, the machine-readable instructions when executed by the processor performing the steps of the second aspect described above, or the method for memory access by a virtual machine in any of the possible embodiments of the second aspect.
In a seventh aspect, this application embodiment further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and the computer program is executed by a processor to perform the steps of the method for accessing a storage of a virtual machine in the first aspect or any one of the possible implementations of the first aspect, or to perform the steps of the method for accessing a storage of a virtual machine in the second aspect or any one of the possible implementations of the second aspect.
In this embodiment of the application, the server may log in a storage service of a network disk allocated to the virtual machine and obtain an identifier of the network disk, and then create a virtual disk with the identifier of the network disk for the virtual machine based on the network disk, so that the virtual machine may access the virtual disk by using the server. After the virtual machine starts the operating system based on the virtual disk, the server may instruct the virtual machine to log in a connection with the network disk. Further, after the virtual machine is connected to the network disk, by recognizing that the identifier of the network disk is consistent with the identifier of the previously accessed virtual disk, it can be determined that the storage access path accessing the same storage space may be an access path of the virtual disk or an access path of the network disk, and further, the access path of the virtual disk may be used as a main path and the access path of the network disk may be used as a standby path. Then, after the server logs out the storage service of the network disk, the virtual machine cannot normally access the virtual disk by means of the server, the access path of the virtual disk fails, and then the virtual machine can switch the access path of the network disk to the main path, so that the virtual machine can directly access the network disk.
According to the scheme, a small amount of server resources can be occupied to access the virtual disk only in the starting stage of the virtual machine, after the virtual machine is started, the virtual machine can directly log in the storage service of the network disk, the access path of the virtual disk and the access path of the network disk form a main path and a standby path, after the server logs out the storage service of the network disk, the virtual machine cannot normally access the virtual disk by means of the server, and then the virtual machine can take the access path of the network disk as the main path after recognizing that the access path of the virtual disk fails, so that the purpose of directly accessing the network disk is achieved without occupying the server resources.
And because the mode of the virtual machine logging in the storage service of the network disk is performed after the virtual machine successfully starts the operating system, compared with the process of logging in the storage service of the network disk through an SAN (storage area network) network in the process of starting the operating system of the virtual machine based on a specific network storage protocol in the prior art, the scheme can be independent of the technical specification of the operating system of the virtual machine and is not limited by several specific network protocols, and has the advantages of wide application range and good expandability.
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a schematic diagram illustrating a possible system architecture provided by an embodiment of the present application;
fig. 2 is a schematic flowchart illustrating a storage access method of a virtual machine according to an embodiment of the present application;
fig. 3 is a schematic structural diagram illustrating a storage access apparatus 30 of a virtual machine according to an embodiment of the present application;
fig. 4 is a schematic structural diagram illustrating a storage access apparatus 40 of a virtual machine according to an embodiment of the present application;
fig. 5 shows a schematic structural diagram of an electronic device provided in an embodiment of the application.
Detailed Description
In order to make the objects, 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 with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
In a virtualized environment, there are two types of disks that can be used by a virtual machine, one is a virtual disk, and the other is a network disk. Where a virtual disk may be understood as a file or block device on a file system created on a server or other storage device. A network disk may be understood as a storage medium allocated for a virtual machine in a remote storage device of a SAN deployment. The virtual disk of the virtual machine is generally used as a system disk, and an operating system of the virtual machine, relevant parameters for running the operating system, and the like are generally stored on the system disk. The network disk of the virtual machine is usually used as a data disk of the virtual machine, and various application data of the virtual machine, for example, various application data generated by an application program on the virtual machine, may be usually stored on the data disk.
Because the virtual machine needs to rely on the server each time it accesses the virtual disk, the problems of longer access path, slower access speed and more occupation of server resources are caused. In order to overcome the above problems, it is proposed that a network disk can be used as both a system disk and a data disk, thereby enabling a virtual machine to directly access the network disk. However, in the existing implementation method, in the starting process of the virtual machine, the storage service of the network disk is logged in through the SAN, and then the virtual machine can only access the network disk and start the BIOS from the network disk, but because the network storage protocol that can be supported by this access method is limited, it is difficult to apply to some new network storage technologies, so that the application range is limited and the extensibility is not good.
In view of the above situation, the present application provides a storage access method and apparatus for a virtual machine, which can enable the virtual machine to directly access a network disk. First, a schematic diagram of a system architecture to which the embodiments of the present application are applicable is described. Referring to fig. 1, the system includes a server, a virtual machine created on the server, and a storage device. The storage device may be configured in a cloud, a part of storage space is pre-partitioned in the storage device and provided for the virtual machine to use, the partitioned part of storage space is used as a network disk of the virtual machine, and the part of storage space may be identified by a logical unit number (lun).
According to the technical scheme, the server can log in the storage service of the network disk and create the virtual disk for the virtual machine based on the network disk. When the virtual machine is in the starting stage, the virtual disk can be accessed through the server to start the operating system. Because the virtual disk is created on the network disk, the process of accessing the virtual disk by the virtual machine through the server is equivalent to accessing the network disk by the virtual machine through the virtual disk. Further, after the virtual machine starts the operating system, the virtual machine may log in the storage service of the network disk under the instruction of the server, and then, by starting the multipath service, the access path of the virtual disk and the access path of the network disk form a master/standby path, so that the virtual machine can simultaneously support two modes of accessing the virtual disk and accessing the network disk. Further, after the multi-path service is started, the virtual machine can instruct the server to unload the virtual disk, so that a path for accessing the virtual disk in the multi-path service is cut off, an access path of the network disk is switched to a main path, and the purpose that the virtual machine accesses the network disk is finally achieved.
The following describes a storage access method of a virtual machine provided in the present application in detail with reference to specific embodiments.
Referring to fig. 2, a schematic flow chart of a storage access method of a virtual machine according to an embodiment of the present application is shown, where the schematic flow chart describes a specific interaction flow between a server and the virtual machine, so as to implement that the virtual machine directly accesses a network disk. The specific interaction process is as follows:
step 201, the server logs in the storage service of the network disk allocated for the virtual machine and acquires the identifier of the network disk.
In a specific implementation, the server may obtain configuration parameters of a network disk allocated to the virtual machine, where the configuration parameters are, for example, a name of the network disk, an IP address of the network disk, and the like. The obtaining mode is, for example, receiving an instruction carrying configuration parameters and the like input by other equipment or a user. The server may then log in to the storage service of the network disk based on the IP address of the network disk and the name of the network disk, and after logging in to the storage service of the network disk, identify the identifier of the network disk. The identifier of the network disk is, for example, a world wide identifier (wwid).
Step 202, the server creates a virtual disk with an identifier of the network disk based on the network disk.
In specific implementation, when the server creates a virtual disk for the virtual machine based on the network disk, the type, the driver, the source path, and the like of the virtual disk may be configured. The type of the virtual disk can be a file or a block device; the drivers of the virtual machines may be configured according to a particular virtualization environment; the source path of the virtual machine may be generated based on the name of the network disk, the IP address, and the logical unit number lun corresponding to the storage space.
In a possible implementation manner, during the process of creating the virtual disk, the server may allocate a temporary identifier to the virtual disk, where the allocation of the temporary identifier may be random or according to a preset rule. After the virtual disk with the temporary identifier is created, since the source path of the virtual disk actually points to the storage space corresponding to the network disk, that is, the virtual disk and the network disk occupy the same storage space, the temporary identifier of the virtual disk may be modified to the identifier of the network disk so as to associate the virtual disk with the network disk.
In another possible embodiment, after the server identifies the identifier of the network disk, since the network disk and the virtual disk occupy the same storage space, the identifier of the created virtual disk may be directly configured as the identifier of the network disk, so as to associate the virtual disk with the network disk.
Step 203, the virtual machine starts the operating system based on the created virtual disk.
In the embodiment of the application, after the server creates the virtual disk for the virtual machine, the virtual machine can sense that the virtual disk can be used, so that the virtual machine can start the operating system by accessing the virtual disk. The access process needs the participation of a server, specifically, the server accesses a virtual disk on a network disk based on the storage service of the network disk, and then the server notifies the virtual machine of an operating system read from the virtual disk, so that the virtual machine starts the operating system.
And step 204, after the server determines that the virtual machine starts the operating system, indicating the virtual machine to log in the storage service of the network disk.
In a specific implementation, after the virtual machine successfully starts the operating system, a notification message that the virtual machine has been started may be sent to the server, and after receiving the notification message, the server may determine that the virtual machine is started. Further, the server may issue configuration parameters of the network disk to the virtual machine, including, for example, a name, an IP address, and the like of the network disk, to instruct the virtual machine to log in the storage service of the network disk.
Step 205, after the virtual machine logs in the storage service of the network disk, determining that the storage access path of the virtual machine includes an access path of the network disk and an access path of the virtual disk based on the identifier shared by the network disk and the virtual disk.
In a specific implementation, the virtual machine may log in the storage service of the network disk based on the IP address of the network disk and the name of the network disk. The virtual machine can recognize the identifier of the network disk after successfully logging in the storage service of the network disk, and can also recognize the identifier of the virtual disk when the virtual machine accesses the virtual disk before. And because sharing the same identifier actually represents that the network disk and the virtual disk share the same storage space, the virtual machine can determine that the storage access path for the same storage space includes two access paths, one is an access path of the virtual disk, and the other is an access path of the network disk.
In this embodiment, the virtual machine may initiate a multi-path service to allow the use of the two storage access paths. The virtual machine has accessed the virtual disk before, so the access path of the virtual disk can be used as a main path, and the virtual machine has not accessed the network disk, so the access path of the network disk is used as a standby path. And when the virtual machine starts the multi-path service, the failure policy can be configured to be highly available, so that when one of the two storage access paths forming the main/standby path fails, the storage access path can be switched to the normal storage access path.
In the embodiment of the application, after the virtual machine successfully starts the multi-path service and confirms that the storage access path directly accessing the network disk is available, an unloading instruction can be sent to the server to instruct the server to unload the network disk. The aim of unloading the network disk is to enable the server to normally log in the storage service of the network disk, because the virtual machine needs to be connected with the network disk by the server to further access the virtual disk when accessing the virtual disk, if the server cannot normally log in the storage service of the network disk, the virtual machine cannot normally access the virtual disk, and further the virtual machine can determine that the access path of the virtual disk fails, and then perform primary and standby path switching, and switch the storage access path to the access path of the network disk.
Step 206, the server logs out the storage service of the network disk.
In specific implementation, after receiving an offload instruction sent by a virtual machine, a server may search for configuration parameters of a network disk corresponding to the virtual machine, and then log out a storage service of the network disk based on an IP address of the network disk and a name of the network disk.
Step 207, after the virtual machine detects that the server logs out the storage service of the network disk, the access path of the network disk is used as a main path.
Because the server logs out the storage service of the network disk, the path depending on the server to access the virtual disk cannot be used, the virtual machine can actively switch the main path and the standby path after detecting that the access path of the virtual disk cannot be used, the access path of the network disk is used as the main path, and the subsequent virtual machine can directly use the access path of the network disk to communicate with the network disk.
In addition, in a possible implementation, after logging out the storage service of the network disk, the server may delete the configuration information about the virtual disk since the virtual disk cannot be accessed. The configuration information of the virtual disk is, for example, the name, drive, source path, and other parameters of the virtual disk.
In this embodiment, the server may obtain an identifier of a network disk allocated to the virtual machine, and create a virtual disk having the identifier of the network disk for the virtual machine based on the network disk, so that the virtual machine may access the virtual disk by using the server. After the virtual machine starts the operating system based on the virtual disk, the server may instruct the virtual machine to log into the storage service of the network disk. Further, after logging in the storage service of the network disk, the virtual machine recognizes that the identifier of the network disk is consistent with the identifier of the previously accessed virtual disk, and can determine that the storage access path accessing the same storage space may be an access path of the virtual disk or an access path of the network disk, and further, the access path of the virtual disk may be used as a main path and the access path of the network disk may be used as a standby path. Then, the server may log out the storage service of the network disk so as to cut off an access path of the virtual disk, and after detecting that the server logs out the storage service of the network disk, the virtual machine may use the access path of the network disk as a main path, and may subsequently implement that the virtual machine directly accesses the network disk.
Based on the above manner, a small amount of server resources can be occupied to access the virtual disk only in the virtual machine starting stage, after the virtual machine is started, the virtual machine can directly log in the storage service of the network disk, so that the access path of the virtual disk and the access path of the network disk form a main standby path, and after the server logs out the storage service of the network disk, the virtual machine cannot normally access the virtual disk by means of the server, and then after the virtual machine recognizes that the access path of the virtual disk fails, the access path of the network disk can be used as a main path, so that the purpose of directly accessing the network disk can be achieved without occupying server resources. And because the starting process of the virtual machine is the virtual disk accessed by the server, compared with the process of directly accessing the network disk based on a specific network storage protocol in the prior art, the scheme can not be limited by a plurality of specific network protocols any more, the application range is wider, and the expandability is better.
In order to better explain the configuration process of the present application, a specific implementation scenario is described below to describe in detail the storage access method of the virtual machine described above in the present application.
In this implementation scenario, the interaction process between the server and the virtual machine can be abstracted as the interaction between two logical units, the host processing module and the client proxy processing module. The host processing module runs on the server and can realize the functions of logging in or logging out the storage service of the network disk by the server, creating a virtual disk for the virtual machine, unloading the virtual disk and the like; the client proxy processing module runs on the virtual machine and can detect functions of starting the virtual machine, logging in or logging out the storage service of the network disk by the virtual machine, starting multipath service and the like. The host processing module and the client agent processing module can interact with each other through a specific serial port, for example, a virtio serial port.
The following is the interaction process of the host processing module and the client agent processing module:
(1) and the host processing module logs in the storage service of the network disk and adds a virtual disk to the virtual machine.
Step 1, a host processing module receives configuration parameters of a network disk distributed for a virtual machine.
The configuration parameters include the name "vmA" of the virtual machine, the name "iqn.abcd.1234: lun 1" of the network disk, and the IP address "192.168.1.1" of the network disk.
And step 2, the host processing module logs in the storage service of the network disk by using the initiaor tool and the name and the IP address of the network disk.
Specifically, the host processing module may input a name and an IP address of the network disk by using an initiaor tool, and further input a "login" instruction, so as to log in the storage service of the network disk, and after logging in the storage service of the network disk, it may recognize that the wwid of the network disk is "1234".
And 3, calling libvirt by the host processing module to add a virtual disk to the virtual machine.
Specifically, the drive of the virtual disk is, for example, virtio, the type of the virtual disk is a block device, and the source path of the virtual disk is "/dev/disk/by-path/ip-192.168.1.1: iqn.abcd.1234: lun 1". In addition, the host processing module can also generate a wwid as "virtual-7890" for the virtual disk through a quick simulator (qemu) module.
The libvirt is an Application Programming Interface (API) for managing the open source of the virtualization platform. Specific usage is found in the prior art and will not be described here.
And step 4, the host processing module issues a qemu module and modifies wwid of the virtual disk.
Specifically, the wwid of the virtual disk conforming to the source path on the server can be searched according to the source path "/dev/disk/by-path/ip-192.168.1.1: iqn.abcd.1234: lun 1" of the disk, and the found wwid of the virtual disk is modified from "virtio-7890" to "1234".
(2) And starting a multipath service process after the virtual machine is started and logs in the storage service of the network disk.
Step 5, the client agent process module monitors the virtual machine startup.
And 6, after the virtual machine starts the operating system based on the virtual disk, the client agent processing module sends a notification message indicating that the virtual machine is started to the server.
And 7, after receiving the notification message indicating that the virtual machine is started, the host processing module searches the name and the IP address of the network disk according to the virtual machine and then notifies the virtual machine of the searched name and IP address of the network disk.
The network disk is named as iqn.abcd.1234: lun1, and the IP address is 192.168.1.1.
And step 8, the client agent processing module logs in the storage service of the network disk by using the initiaor tool and the name and the IP address of the network disk.
Specifically, the client agent module may use an initiaor tool to input the name and IP address of the network disk, and further input a "login" command to log in the storage service of the network disk. After a network disk is successfully connected, a wwid of the network disk can be identified as "1234".
And step 9, the client agent processing module can issue the multipath configuration parameters to a GuestOS module in the virtual machine.
Wherein the Guest OS module can be understood as an operating system module running on the virtual machine. The multipath configuration parameters issued by the client agent processing module to the guest os module may include configuration parameters that allow the local disk to configure multipath and configuration parameters that make the failure policy highly available. Since the wwids of the network disk and the virtual disk are the same, the virtual machine may allow the access path of the virtual disk and the access path of the network disk to be used.
Step 10, the client agent processing module initiates the multipath service.
After the multi-path service is started, because the wwid of the network disk is the same as that of the virtual disk, the virtual machine can allow the access path of the virtual disk and the access path of the network disk to be used, and because the access path used by the virtual machine when the operating system is started is the access path of the virtual disk, the virtual machine can use the access path of the virtual disk as a main path and the access path of the network disk as a standby path.
(3) And the host processing module unloads and deletes the network disk.
And step 11, the client agent processing module sends an unloading instruction for unloading the virtual disk to the host processing module.
And step 12, after the host processing module receives the unloading instruction, searching the configuration parameters of the network disk corresponding to the virtual machine, and logging out the storage service of the network disk by using an initiaor tool and the name and IP address of the network disk.
Specifically, the host processing module may use an initiaor tool to input the name and the IP address of the network disk, and further input a "logout" instruction, to implement the storage service of logging out the network disk.
And step 13, the client agent processing module takes the access path of the network disk as a main path.
The virtual machine can perform the main-standby switching process after recognizing that the access path of the virtual disk has a fault, and the access path of the network disk is taken as the main path.
And step 14, calling libvirt by the host processing module to delete the configuration information of the virtual disk.
The configuration information includes, for example, the name of the virtual disk, and the source path, the drive, and the like of the virtual disk.
In the embodiment of the present application, in the process of implementing that the virtual machine directly accesses the network disk, the virtual disk is accessed by the server only at the stage of starting the operating system of the virtual machine, and after the operating system is started up by the virtual machine, the virtual machine can directly log in the storage service of the network disk by using the initial tool and the IP address and name of the network disk, so that it can be seen that the storage service of the network disk is logged in by the virtual machine after the operating system has been successfully started up by the virtual machine, compared with the existing mode of logging in the storage service of the network disk by using the SAN network at the stage of BIOS start-up, the embodiment of the present application can log in the storage service of the network disk by using the initial tool without depending on the BIOS specification of the virtual machine, so that the present application has better expansibility, and can not only be applied to the present nonvolatile Memory host controller interface specification (Non-Volatile Memory architecture, NVMeoF) protocol, as well as network storage protocols that may come into existence in the future.
In addition, in order to realize that the virtual machine directly accesses the network disk, after logging in the storage service of the network disk, the virtual machine can also use the access path of the virtual disk as a main path and the access path of the network disk as a standby path by starting the multi-path service, and then instruct the server to unload the virtual disk so as to cut off the path for accessing the virtual disk in the multi-path service, so that the access path of the network disk is switched to the main path, and the subsequent virtual machine can directly access the network disk.
Based on the same application concept, a storage access device of a virtual machine corresponding to a storage access method of the virtual machine is also provided in the embodiments of the present application, and because the principle of solving the problem of the device in the embodiments of the present application is similar to the storage access method of the virtual machine in the embodiments of the present application, the implementation of the device may refer to the implementation of the method, and repeated details are not repeated.
Referring to fig. 3, which is a schematic structural diagram of a storage access apparatus of a virtual machine according to an embodiment of the present application, the apparatus 30 includes: an acquisition module 31, a creation module 32, an indication module 33, and an uninstallation module 34; wherein,
an obtaining module 31, configured to log in a storage service of a network disk allocated to the virtual machine and obtain an identifier of the network disk;
a creating module 32, configured to create, for the virtual machine, a virtual disk with an identifier of the network disk based on the network disk;
an indicating module 33, configured to, after it is determined that the virtual machine starts an operating system based on the virtual disk, indicate the virtual machine to log in a storage service of the network disk; the storage access path after the virtual machine logs in the storage service of the network disk comprises an access path of the network disk and an access path of the virtual disk, wherein the access path of the virtual disk is a main path, and the access path of the network disk is a standby path;
an unloading module 34, configured to log out the storage service of the network disk, so that the virtual machine switches an access path of the network disk to a main path.
In a possible design, when logging in the storage service of the network disk allocated to the virtual machine and acquiring the identifier of the network disk, the acquiring module 31 is specifically configured to:
and acquiring the Internet Protocol (IP) address of the network disk and the name of the network disk, and logging in the storage service of the network disk based on the IP address and the name.
In one possible design, when the creating module 32 creates a virtual disk with an identifier of the network disk for the virtual machine based on the network disk, the creating module is specifically configured to:
creating the virtual disk with a temporary identifier in the network disk;
and modifying the temporary identifier of the virtual disk into the identifier of the network disk.
In one possible design, the uninstall module 34 is specifically configured to, when logging out the storage service of the network disk:
and after receiving an unloading instruction which is sent by the virtual machine and used for indicating to unload the network disk, logging out the storage service of the network disk.
In one possible design, the offload module 34, after logging out the storage service of the network disk, is further configured to:
and deleting the configuration information of the virtual disk.
The description of the processing flow of each module in the device 30 and the interaction flow between the modules may refer to the description related to the server in the above method embodiment, and will not be described in detail here.
Based on the same application concept, the present application also provides another storage access apparatus for a virtual machine, and as shown in fig. 4, the apparatus 40 includes: a starting module 41, a connecting module 42, a determining module 43 and a switching module 44; wherein,
a starting module 41, configured to start an operating system of the virtual machine based on the virtual disk; the virtual disk is created for the virtual machine by the host based on a network disk, and identifiers of the network disk and the virtual disk are consistent;
a connection module 42, configured to log in a storage service of the network disk under the instruction of the server;
a determining module 43, configured to determine, based on the identifier shared by the network disk and the virtual disk, that a storage access path of the virtual machine includes an access path of the network disk and an access path of the virtual disk; the access path of the virtual disk is a main path, and the access path of the network disk is a standby path;
a switching module 44, configured to switch an access path of the network disk to a main path after detecting that the server logs out the storage service of the network disk.
In one possible design, when determining that the storage access path of the virtual machine includes an access path of the network disk and an access path of the virtual disk based on the identifier shared by the network disk and the virtual disk, the determining module 43 is specifically configured to:
when the identifier shared by the network disk and the virtual disk is identified, determining the access path of the virtual disk as a main path and determining the access path of the network disk as a standby path by starting a multi-path service.
The description of the processing flow of each module in the apparatus 40 and the interaction flow between each module may refer to the description related to the virtual machine in the above method embodiment, and will not be described in detail here.
Based on the same application concept, an embodiment of the present application further provides a structural schematic diagram of an electronic device, where the electronic device 50 includes a processor 51, a memory 52, and a bus 53, the memory 52 stores an execution instruction, when the device 50 runs, the processor 51 communicates with the memory 52 through the bus 53, and the processor 51 executes the execution instruction stored in the memory 52, so that the device 50 executes the steps of implementing the storage access method of the virtual machine according to the foregoing method embodiment.
In a possible implementation, the storage access method of the virtual machine executed by the processor 51 is as follows:
logging in storage service of a network disk allocated for the virtual machine and acquiring an identifier of the network disk;
creating a virtual disk with an identifier of the network disk for the virtual machine based on the network disk;
after determining that the virtual machine starts an operating system based on the virtual disk, indicating the virtual machine to log in a storage service of the network disk; the storage access path after the virtual machine logs in the storage service of the network disk comprises an access path of the network disk and an access path of the virtual disk, wherein the access path of the virtual disk is a main path, and the access path of the network disk is a standby path;
logging out the storage service of the network disk so that the virtual machine switches the access path of the network disk to a main path.
In another possible embodiment, the storage access method of the virtual machine executed by the processor 51 is as follows:
starting an operating system of the virtual machine based on the virtual disk; the virtual disk is created for the virtual machine by the host based on a network disk, and identifiers of the network disk and the virtual disk are consistent;
logging in the storage service of the network disk under the instruction of the server;
determining, based on the identifier shared by the network disk and the virtual disk, that a storage access path of the virtual machine includes an access path of the network disk and an access path of the virtual disk; the access path of the virtual disk is a main path, and the access path of the network disk is a standby path;
and switching the access path of the network disk to a main path after detecting that the server logs out the storage service of the network disk.
The specific processing flow involved in the processor 51 can be referred to the related description in the above method embodiments, and will not be further described here.
According to the storage access method and device of the virtual machine, a small amount of server resources can be occupied to access the virtual disk only in the virtual machine starting stage, after the virtual machine is started, the virtual machine can directly log in the storage service of the network disk, the access path of the virtual disk and the access path of the network disk form a main path and a standby path, after the server logs out the storage service of the network disk, the virtual machine cannot normally access the virtual disk by means of the server, and the access path of the network disk can be used as a main path after the virtual machine recognizes that the access path of the virtual disk fails, so that the server resources do not need to be occupied, and the purpose of directly accessing the network disk is achieved. And because the mode of the virtual machine logging in the storage service of the network disk is performed after the virtual machine successfully starts the operating system, compared with the process of logging in the storage service of the network disk through an SAN (storage area network) network in the process of starting the operating system of the virtual machine based on a specific network storage protocol in the prior art, the scheme can be independent of the technical specification of the operating system of the virtual machine and is not limited by several specific network protocols, and has the advantages of wide application range and good expandability.
In addition, an embodiment of the present application further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program performs the steps of the storage access method for a virtual machine described in the above method embodiment.
The computer program product of the storage access method for a virtual machine provided in the embodiment of the present application includes a computer-readable storage medium storing a program code, where instructions included in the program code may be used to execute steps of the storage access method for a virtual machine in the above method embodiment, which may be specifically referred to in the above method embodiment, and details are not described here.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the system and the apparatus described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again. In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a non-volatile computer-readable storage medium executable by a processor. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (14)
1. A storage access method of a virtual machine is applied to a server, wherein the virtual machine is created in the server, and the method is characterized by comprising the following steps:
logging in storage service of a network disk allocated for the virtual machine and acquiring an identifier of the network disk;
creating a virtual disk with an identifier of the network disk for the virtual machine based on the network disk;
after determining that the virtual machine starts an operating system based on the virtual disk, indicating the virtual machine to log in a storage service of the network disk; the storage access path after the virtual machine logs in the storage service of the network disk comprises an access path of the network disk and an access path of the virtual disk, wherein the access path of the virtual disk is a main path, and the access path of the network disk is a standby path;
logging out the storage service of the network disk so that the virtual machine switches the access path of the network disk to a main path.
2. The method of claim 1, wherein the logging into storage services of a network disk allocated for the virtual machine comprises:
and acquiring the Internet Protocol (IP) address of the network disk and the name of the network disk, and logging in the storage service of the network disk based on the IP address and the name.
3. The method of claim 1, wherein the creating a virtual disk for the virtual machine based on the network disk with an identifier of the network disk comprises:
creating the virtual disk with a temporary identifier in the network disk;
and modifying the temporary identifier of the virtual disk into the identifier of the network disk.
4. The method of claim 1, wherein the logging out of the storage service of the network disk comprises:
and after receiving an unloading instruction which is sent by the virtual machine and used for indicating to unload the network disk, logging out the storage service of the network disk based on the IP address of the network disk and the name of the network disk.
5. The method of claim 1 or 4, further comprising, after logging out of the storage service of the network disk:
and deleting the configuration information of the virtual disk.
6. A storage access method of a virtual machine is applied to the virtual machine created on a server, and is characterized by comprising the following steps:
starting an operating system of the virtual machine based on the virtual disk; the virtual disk is created for the virtual machine by the server based on a network disk, and identifiers of the network disk and the virtual disk are consistent;
logging in the storage service of the network disk under the instruction of the server;
determining, based on the identifier shared by the network disk and the virtual disk, that a storage access path of the virtual machine includes an access path of the network disk and an access path of the virtual disk, where the access path of the virtual disk is a primary path and the access path of the network disk is a backup path;
and switching the access path of the network disk to a main path after detecting that the server logs out the storage service of the network disk.
7. The method of claim 6, wherein the determining that the storage access path of the virtual machine includes the access path of the network disk and the access path of the virtual disk based on the identifier that the network disk shares with the virtual disk comprises:
when the identifier shared by the network disk and the virtual disk is identified, determining the access path of the virtual disk as a main path and determining the access path of the network disk as a standby path by starting a multi-path service.
8. A storage access apparatus of a virtual machine, the apparatus comprising:
the acquisition module is used for logging in storage service of a network disk distributed for the virtual machine and acquiring an identifier of the network disk;
a creation module for creating a virtual disk having an identifier of the network disk for the virtual machine based on the network disk;
the indication module is used for indicating the virtual machine to log in the storage service of the network disk after determining that the virtual machine starts an operating system based on the virtual disk; the storage access path after the virtual machine logs in the storage service of the network disk comprises an access path of the network disk and an access path of the virtual disk, wherein the access path of the virtual disk is a main path, and the access path of the network disk is a standby path;
and the unloading module is used for logging out the storage service of the network disk so as to enable the virtual machine to switch the access path of the network disk into a main path.
9. The apparatus of claim 8, wherein the obtaining module, when logging in the storage service of the network disk allocated for the virtual machine, is specifically configured to:
and acquiring the Internet Protocol (IP) address of the network disk and the name of the network disk, and logging in the storage service of the network disk based on the IP address and the name.
10. The apparatus of claim 8, wherein the creation module, when creating the virtual disk with the identifier of the network disk for the virtual machine based on the network disk, is specifically configured to:
creating the virtual disk with a temporary identifier in the network disk;
and modifying the temporary identifier of the virtual disk into the identifier of the network disk.
11. The apparatus as claimed in claim 8, wherein the offload module, when logging out of the storage service of the network disk, is specifically configured to:
and after receiving an unloading instruction which is sent by the virtual machine and used for indicating to unload the network disk, logging out the storage service of the network disk based on the IP address of the network disk and the name of the network disk.
12. The apparatus of claim 8 or 11, wherein the offload module, after logging out of the storage service of the network disk, is further to:
and deleting the configuration information of the virtual disk.
13. A storage access apparatus of a virtual machine, the apparatus comprising:
the starting module is used for starting an operating system of the virtual machine based on the virtual disk; the virtual disk is created for the device by the server based on a network disk, and the identifiers of the network disk and the virtual disk are consistent;
the connection module is used for logging in the storage service of the network disk under the instruction of the server;
a determining module, configured to determine, based on the identifier shared by the network disk and the virtual disk, that a storage access path of the virtual machine includes an access path of the network disk and an access path of the virtual disk; the access path of the virtual disk is a main path, and the access path of the network disk is a standby path;
the switching module is configured to switch an access path of the network disk to a main path after detecting that the server logs out the storage service of the network disk.
14. The apparatus of claim 13, wherein the determining module, when determining that the storage access path of the virtual machine includes an access path of the network disk and an access path of the virtual disk based on the identifier shared by the network disk and the virtual disk, is specifically configured to:
when the identifier shared by the network disk and the virtual disk is identified, determining the access path of the virtual disk as a main path and determining the access path of the network disk as a standby path by starting a multi-path service.
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