CN106126115A - A kind of method and device of the disk of EVM(extended virtual machine) - Google Patents

Abstract

The present invention provides a method and device for expanding a disk of a virtual machine. The method includes: obtaining the expansion configuration information of the disk to be expanded in the virtual machine; determining the disk to be expanded according to the expansion configuration information; The expansion configuration information is used to determine the expanded target capacity; the capacity of the disk to be expanded is expanded to the target capacity to generate an expanded disk; and the expanded disk is identified. The present invention provides a method and device for expanding the disk of a virtual machine, which can realize the expansion of the disk of the virtual machine more simply.

Description

A method and device for extending a disk of a virtual machine

technical field

The invention relates to the field of computer technology, in particular to a method and device for extending a disk of a virtual machine.

Background technique

With the increasing demand for disk capacity, the disks of virtual machines with various functions in the virtualization environment cannot meet more data storage requirements. How to expand the disk of the virtual machine has become an urgent problem to be solved.

In the prior art, when expanding the disk of a virtual machine, the system business in the disk to be expanded is generally first migrated, and then the disk to be expanded is physically expanded, and after the expansion is completed, the migrated system business is migrated to the expanded disk.

It can be seen from the above description that in the prior art, when performing disk expansion, system services in the disk need to be migrated, and the process is relatively complicated.

Contents of the invention

Embodiments of the present invention provide a method and device for extending a disk of a virtual machine, which can more simply realize the expansion of the disk of the virtual machine.

In a first aspect, an embodiment of the present invention provides a method for extending a disk of a virtual machine, including:

Obtain the extended configuration information of the disk to be extended in the virtual machine;

Determine the disk to be expanded according to the expansion configuration information;

Determine the expanded target capacity according to the expanded configuration information;

expanding the capacity of the disk to be expanded to the target capacity to generate an expanded disk;

Identify the expanded disk.

Further, the expansion configuration information includes: the identification of the disk to be expanded;

The determining the disk to be expanded according to the expansion configuration information includes:

Determine the disk to be expanded according to the identifier of the disk to be expanded in the expansion configuration information.

Further, the expanding the capacity of the disk to be expanded to the target capacity to generate the expanded disk includes:

call growpart, use growpart to expand the capacity of the disk to be expanded to the target capacity, and generate the expanded disk.

Further, before performing the identifying the expanded disk, it also includes:

Determine the file system type of the disk to be expanded;

The identifying the expanded disk includes:

When it is determined that the file system type of the disk to be expanded is ext2, ext3 or ext4, call resize2fs, and use the resize2fs to identify the expanded disk;

When it is determined that the file system type of the disk to be expanded is XFS, call xfs_grow, and use the xfs_grow to identify the expanded disk.

Further, the expanding the capacity of the disk to be expanded to the target capacity to generate the expanded disk includes:

According to the target capacity, the address of the start sector and the address of the end sector in the partition table corresponding to the disk to be expanded are modified to generate the expanded disk.

In a second aspect, an embodiment of the present invention provides an apparatus for extending a disk of a virtual machine, including:

An acquisition unit, configured to acquire extended configuration information of the disk to be expanded in the virtual machine;

A first determination unit, configured to determine the disk to be expanded according to the expansion configuration information;

The second determining unit is configured to determine the expanded target capacity according to the expanded configuration information;

a generating unit, configured to expand the capacity of the disk to be expanded to the target capacity, and generate an expanded disk;

An identifying unit, configured to identify the expanded disk.

Further, the expansion configuration information includes: the identification of the disk to be expanded;

The first determining unit is configured to determine the disk to be expanded according to the identifier of the disk to be expanded in the expansion configuration information.

Further, the generating unit is configured to call growpart, and use growpart to expand the capacity of the disk to be expanded to the target capacity, and generate the expanded disk.

Further, it also includes: a third determining unit, configured to determine the file system type of the disk to be expanded;

The identifying unit is configured to call resize2fs when it is determined that the file system type of the disk to be expanded is ext2, ext3 or ext4, and use the resize2fs to identify the expanded disk, and when it is determined that the disk to be expanded When the file system type is XFS, call xfs_grow, and use the xfs_grow to identify the expanded disk.

Further, the generating unit is configured to modify the address of the start sector and the address of the end sector in the partition table corresponding to the disk to be expanded according to the target capacity to generate the expanded disk.

In the embodiment of the present invention, according to the expansion configuration information, the target capacity after expansion is determined, and the disk to be expanded of the virtual machine is directly expanded without processing the physical hard disk, and the capacity of the disk to be expanded is expanded to the target capacity. The expanded disk can directly use the expanded disk, and the system business on the disk to be expanded can run directly without migration, which makes it easier to expand the disk of the virtual machine.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are For some embodiments of the present invention, those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a flowchart of a method for extending a disk of a virtual machine according to an embodiment of the present invention;

FIG. 2 is a flowchart of another method for extending a disk of a virtual machine provided by an embodiment of the present invention;

FIG. 3 is a schematic diagram of an apparatus for extending a disk of a virtual machine according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of another device for extending a disk of a virtual machine provided by an embodiment of the present invention.

detailed description

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

As shown in FIG. 1, an embodiment of the present invention provides a method for extending a disk of a virtual machine, and the method may include the following steps:

Step 101: Obtain the extended configuration information of the disk to be extended in the virtual machine;

Step 102: Determine the disk to be expanded according to the expansion configuration information;

Step 103: Determine the expanded target capacity according to the expanded configuration information;

Step 104: expand the capacity of the disk to be expanded to the target capacity, and generate an expanded disk;

Step 105: Identify the expanded disk.

In the embodiment of the present invention, according to the expansion configuration information, the target capacity after expansion is determined, and the disk to be expanded of the virtual machine is directly expanded without processing the physical hard disk, and the capacity of the disk to be expanded is expanded to the target capacity. The expanded disk can directly use the expanded disk, and the system business on the disk to be expanded can run directly without migration, which makes it easier to expand the disk of the virtual machine.

In an embodiment of the present invention, the expansion configuration information includes: the identifier of the disk to be expanded;

The determining the disk to be expanded according to the expansion configuration information includes:

Determine the disk to be expanded according to the identifier of the disk to be expanded in the expansion configuration information.

In the embodiment of the present invention, the user can specify the disk to be expanded by configuring the expansion configuration information of the disk to be expanded. For example, the name of the disk to be expanded is set in the expansion configuration information, and the corresponding disk to be expanded is found according to the name.

In an embodiment of the present invention, expanding the capacity of the disk to be expanded to the target capacity and generating the expanded disk includes:

call growpart, use growpart to expand the capacity of the disk to be expanded to the target capacity, and generate the expanded disk.

growpart is a tool for expanding a disk partition. In the embodiment of the present invention, growpart is used to expand the disk to be expanded. For example, the target capacity is 100G, and the capacity of the disk to be expanded is 50G. Use growpart to divide the 50G capacity of the disk to be expanded based on the 50G capacity of the disk to be expanded, and merge the newly divided 50G capacity into the disk to be expanded to obtain the expanded disk. The capacity of the expanded disk is 100G, reaching the target capacity .

In an embodiment of the present invention, expanding the capacity of the disk to be expanded to the target capacity and generating the expanded disk includes:

According to the target capacity, the address of the start sector and the address of the end sector in the partition table corresponding to the disk to be expanded are modified to generate the expanded disk.

In the embodiment of the present invention, the expansion of the disk to be expanded can be realized by modifying the address of the sector. For example, if the target capacity is 100G, the capacity of the disk to be expanded is 50G, the address of the start sector of the disk to be expanded is 1, and the address of the end sector is 50. In order to expand to 100G, the address of the end sector can be Change it to 100, so that the address of the start sector in the partition table is 1, and the address of the end sector is 100, so that the capacity of the expanded disk is 100G.

After obtaining the expanded disk, the operating system of the virtual machine does not take effect synchronously, and the user cannot really effectively use the expanded disk space. In order to make the expanded disk take effect, in an embodiment of the present invention, when executing the Before identifying the expanded disk, also include:

Determine the file system type of the disk to be expanded;

The identifying the expanded disk includes:

When it is determined that the file system type of the disk to be expanded is ext2, ext3 or ext4, call resize2fs, and use the resize2fs to identify the expanded disk;

When it is determined that the file system type of the disk to be expanded is XFS, call xfs_grow, and use the xfs_grow to identify the expanded disk.

In the embodiment of the present invention, by identifying the expanded disk, the expanded disk can take effect in the operating system, and the user can directly use the expanded disk. Both resize2fs and XFS are tools for expanding file system partitions. Different tools need to be selected for different file system types to identify them. When the file system type of the disk to be expanded is any one of ext2, ext3, and ext4, select resize2fs for identification; when the file system type of the disk to be expanded is XFS, select xfs_grow for identification.

As shown in Figure 2, the embodiment of the present invention provides a method for expanding the disk of a virtual machine. In the embodiment of the present invention, the virtual machine is a virtual machine in environments such as vmware and openstack, and the disk to be expanded is a virtual machine in the virtual machine. disk A, the method may include the following steps:

Step 201: preset extended configuration information of disk A in the virtual machine, the extended configuration information includes: name of disk A and target capacity.

User configuration items can be set in advance. Users can set extended configuration information through user configuration items. Users can specify the disk to be expanded and the capacity to be achieved by setting extended configuration information. In addition, the disk can also be configured through user configuration items. The type of the file system and the mounting path of the disk. Corresponding to a new disk, the user can format the disk as the file system type specified in the user configuration item as needed, and can also specify the mount point and partition mode of the disk.

For example, the target capacity is 100G. That is to say, the user needs to expand disk A to 100G.

Step 202: Determine that the disk to be expanded is disk A according to the name of disk A in the expansion configuration information.

The name of disk A is a kind of identifier of disk A, and the corresponding disk can be found through the name. The corresponding disk can also be found through the address, serial number, and other identifiers of disk A, so that the disk can be operated on later.

Step 203: Determine the target capacity of the expanded disk according to the target capacity in the expansion configuration information.

For example, if the target capacity is 100G, then the capacity of the expanded disk is 100G.

Step 204: Determine the file system type of disk A.

File system types include: ext2, ext3, ext4, XFS, etc.

Step 205: call growpart, use growpart to expand the capacity of disk A to the target capacity, and generate the expanded disk.

Specifically, growpart may be used to modify the address of the start sector and the address of the end sector in the partition table corresponding to the disk to be expanded according to the target capacity to generate the expanded disk.

For example, if the target capacity is 100G, use growpart to expand the capacity of disk A to 100G.

Step 206: When it is determined that the file system type of disk A is ext2, ext3 or ext4, call resize2fs, and use resize2fs to identify the expanded disk; when it is determined that the file system type of disk A is XFS, call xfs_grow, and use xfs_grow to identify Expanded disk.

After disk A is expanded, the random capacity is increased to the target capacity, but the increased capacity cannot be recognized by the operating system and cannot be effectively used by the operating system. In order to enable the increased capacity to be used by the operating system, it is necessary to identify the expanded disk. Different tools are used to identify different file system types. For example, when the file system type of disk A is ext2, ext3 or ext4, resize2fs is used for identification; when the file system type of disk A is XFS, xfs_grow is used for identification.

In the embodiment of the present invention, the processing of disk expansion of a new virtual machine and the demand processing of disk expansion of an existing virtual machine can be realized, which can be realized in environments such as vmware and openstack.

In the embodiment of the present invention, when the size of the primary disk of the virtual machine created from the virtual machine template or image is not satisfied, in the embodiment of the present invention, the size of the primary disk can be expanded, and the virtual machine can be automatically extended to the primary partition after the virtual machine is created , you can directly use the expanded disk to ensure the normal operation of the virtual machine.

When the existing virtual machine disk requirements are not met and a new disk needs to be mounted, in the embodiment of the present invention, after the disk is mounted, the disk partition can be automatically performed and mounted to a specified directory.

When the size of the disk that has been mounted to the virtual machine is not satisfied, in the embodiment of the present invention, the size of the disk that has been mounted can be expanded, the partition information of the disk can be automatically modified, and the original file is guaranteed to be free of problems. disk can be used.

In the embodiment of the present invention, the migration or adjustment of system services caused by disk expansion is avoided, and the automatic disk expansion can be completed without changing the system services. partition size and file system type.

In the embodiment of the present invention, the disk can be automatically expanded according to the scene requirements, so that the user can expand the disk of the virtual machine more conveniently and quickly, not only the main disk can be expanded, but also various disks other than the main disk can be expanded. .

As shown in FIG. 3 and FIG. 4 , an embodiment of the present invention provides an apparatus for extending a disk of a virtual machine. The device embodiments can be implemented by software, or by hardware or a combination of software and hardware. From the hardware level, as shown in Figure 3, it is a hardware structure diagram of the device where the device for expanding the disk of the virtual machine provided by the embodiment of the present invention, except for the processor, memory, and network interface shown in Figure 3 , and non-volatile memory, the device where the device in the embodiment is located may generally include other hardware, such as a forwarding chip responsible for processing packets, and the like. Taking software implementation as an example, as shown in Figure 4, as a device in a logical sense, it is formed by reading the corresponding computer program instructions in the non-volatile memory into the memory for operation by the CPU of the device where it is located. An apparatus for extending a disk of a virtual machine provided in this embodiment includes:

An obtaining unit 401, configured to obtain extended configuration information of a disk to be extended in the virtual machine;

The first determining unit 402 is configured to determine the disk to be expanded according to the expansion configuration information;

The second determining unit 403 is configured to determine the expanded target capacity according to the expanded configuration information;

A generating unit 404, configured to expand the capacity of the disk to be expanded to the target capacity, and generate an expanded disk;

The identifying unit 405 is configured to identify the expanded disk.

In an embodiment of the present invention, the expansion configuration information includes: the identifier of the disk to be expanded;

The first determining unit is configured to determine the disk to be expanded according to the identifier of the disk to be expanded in the expansion configuration information.

In an embodiment of the present invention, the generating unit is configured to call growpart, and use growpart to expand the capacity of the disk to be expanded to the target capacity, and generate the expanded disk.

In an embodiment of the present invention, it further includes: a third determining unit, configured to determine the file system type of the disk to be expanded;

The identifying unit is configured to call resize2fs when it is determined that the file system type of the disk to be expanded is ext2, ext3 or ext4, and use the resize2fs to identify the expanded disk, and when it is determined that the disk to be expanded When the file system type is XFS, call xfs_grow, and use the xfs_grow to identify the expanded disk.

In an embodiment of the present invention, the generating unit is configured to modify the address of the start sector and the address of the end sector in the partition table corresponding to the disk to be expanded according to the target capacity, and generate the extended after the disk.

The information exchange and execution process among the units in the above-mentioned device are based on the same concept as the method embodiment of the present invention, and the specific content can refer to the description in the method embodiment of the present invention, and will not be repeated here.

Various embodiments of the present invention have at least the following beneficial effects:

1. In the embodiment of the present invention, according to the expansion configuration information, the target capacity after expansion is determined, and the disk to be expanded of the virtual machine is directly expanded without processing the physical hard disk, and the capacity of the disk to be expanded is expanded to the target capacity, After the expanded disk is identified, the expanded disk can be used directly, and the system business on the disk to be expanded can be run directly without migration, and the disk expansion of the virtual machine can be realized more simply.

2. In the embodiment of the present invention, it may be required to automatically expand the disk of the virtual machine, so that the user can more conveniently and quickly realize the expansion of the disk of the virtual machine, and the automatic expansion of the disk can be completed without changing the system business. Use the expanded disk directly to ensure the normal operation of the virtual machine.

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

Those of ordinary skill in the art can understand that all or part of the steps for realizing the above-mentioned method embodiments can be completed by hardware related to program instructions, and the aforementioned programs can be stored in a computer-readable storage medium. When the program is executed, the It includes the steps of the above method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other various media that can store program codes.

Finally, it should be noted that: the above descriptions are only preferred embodiments of the present invention, and are only used to illustrate the technical solutions of the present invention, and are not used to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention are included in the protection scope of the present invention.

Claims (10)

1. the method for the disk of an EVM(extended virtual machine), it is characterised in that including:

The expanded configuration information of the disk to be extended in acquisition virtual machine；

According to described expanded configuration information, determine described in disk to be extended；

According to described expanded configuration information, determine the target capacity after extension；

It is described target capacity by the capacity extension of described disk to be extended, generates the disk after extension；

Identify the disk after described extension.

Method the most according to claim 1, it is characterised in that

Described expanded configuration information includes: described in the mark of disk to be extended；

Described according to described expanded configuration information, determine described in disk to be extended, including:

According to the mark of disk to be extended described in described expanded configuration information, determine described in disk to be extended.

Method the most according to claim 1, it is characterised in that the described capacity extension by described disk to be extended is described Target capacity, generates the disk after extension, including:

Calling growpart, utilizing growpart is described target capacity by the capacity extension of described disk to be extended, and generates institute State the disk after extension.

Method the most according to claim 1, it is characterised in that

Before disk after performing the described extension of described identification, also include:

The file system type of disk to be extended described in determining；

Disk after the described extension of described identification, including:

When described in determining wait extend disk file system type be ext2, ext3 or ext4 time, call resize2fs, profit The disk after described extension is identified with described resize2fs；

When described in determining wait extend disk file system type be XFS time, call xfs_grow, utilize described xfs_grow Identify the disk after described extension.

5. according to described method arbitrary in claim 1-4, it is characterised in that

The described capacity extension by described disk to be extended is described target capacity, generates the disk after extension, including:

According to described target capacity, the address of the initial sector in the partition table that disk to be extended described in amendment is corresponding and terminate fan The address in district, generates the disk after described extension.

6. the device of the disk of an EVM(extended virtual machine), it is characterised in that including:

Acquiring unit, for obtaining the expanded configuration information of the disk to be extended in virtual machine；

First determines unit, for according to described expanded configuration information, determine described in disk to be extended；

Second determines unit, for according to described expanded configuration information, determines the target capacity after extension；

Signal generating unit, for being described target capacity by the capacity extension of described disk to be extended, generates the disk after extension；

Recognition unit, the disk after identifying described extension.

Device the most according to claim 6, it is characterised in that

Described expanded configuration information includes: described in the mark of disk to be extended；

Described first determines unit, for the mark according to disk to be extended described in described expanded configuration information, determines institute State disk to be extended.

Device the most according to claim 6, it is characterised in that described signal generating unit, is used for calling growpart, utilizes The capacity extension of described disk to be extended is described target capacity by growpart, generates the disk after described extension.

Device the most according to claim 6, it is characterised in that

Also include: the 3rd determines unit, be used for the file system type of disk to be extended described in determining；

Described recognition unit, for when described in determining wait extend disk file system type be ext2, ext3 or ext4 time, Call resize2fs, utilize described resize2fs to identify the disk after described extension, disk to be extended described in determine When file system type is XFS, call xfs_grow, the disk after utilizing described xfs_grow to identify described extension.

10. according to described device arbitrary in claim 6-9, it is characterised in that

Described signal generating unit, for according to described target capacity, initiateing in the partition table that disk extend described in amendment is corresponding The address of sector and the address of termination sector, generate the disk after described extension.