CN109325012A

CN109325012A - Method for modifying virtual machine mirror image partition

Info

Publication number: CN109325012A
Application number: CN201810897238.7A
Authority: CN
Inventors: 马桂成; 季统凯
Original assignee: G Cloud Technology Co Ltd
Current assignee: G Cloud Technology Co Ltd
Priority date: 2018-08-08
Filing date: 2018-08-08
Publication date: 2019-02-12

Abstract

The present invention relates to the field of desktop cloud image management technology, and in particular to a method for modifying a virtual machine image partition. The method of the present invention is to create a new image according to the queried virtual machine partition situation; and modify the partition of the new image as needed; and then replace the original image with the new image. The present invention solves the problems of being unable to automatically modify the image partition, unable to compress the image, unable to take effect on the virtual machine that is using the image, and unable to reduce the size of the image partition; and can be applied to the desktop cloud image management technology field.

Description

A method of modification virtual machine image subregion

Technical field

The present invention relates to desktop cloud mirror image administrative skill field, especially a kind of method for modifying virtual machine image subregion.

Background technique

There are more and more desktop cloud platforms to be applied to inside each enterprise now, each enterprise demand is very It is personalized；It much requires and existing server is utilized, such as create cloud desktop based on existing server；In this way The disk configuration of cloud desktop is usually also required to personalization.Traditional mode mainly by way of manual, needs to make according to user The cloud desktop for making the disk partition to meet the requirements of the customers is supplied to user's use, can there is following hidden danger in this way:

First is that a secondary mirror will be remake by hand according to each customer demand when desktop cloud project is more and more Picture.Actually the software of cloud desktop is all consistent with operating system, and only disk partition and CPU configuration are different.And CPU configuration is logical It is all often that dynamic adjusts, and system disk subregion is then mirror image default.And a completely new mirror image is made, it is various to installing by bare machine Software is very time-consuming and laborious.

Second is that client wants to adjust partition size again actually in use process, need into each cloud desktop Inside operating system, the subregion of each cloud desktop is modified by hand in the same way, and the usual quantity of the desktop of desktop cloud all compares Huger, such efficiency is very low, and manual operation user makes mistakes.

To solve the above-mentioned problems, a kind of method for modifying virtual machine image subregion is needed.It is virtual by a kind of modification The method of machine mirrored partition, in a manner of full-automatic, efficient, mirrored partition can not be modified automatically, can not press by being able to solve Contracting mirror image cannot come into force to the virtual machine that mirror image is used, can not reduce the problems such as mirror image partition size.

Summary of the invention

Present invention solves the technical problem that being to provide a kind of method for modifying virtual machine image subregion；Solving can not be certainly Dynamic modification mirrored partition, mirror image can not be compressed, cannot be come into force to the virtual machine that mirror image is used, can not to reduce mirrored partition big The problems such as small.

The technical solution that the present invention solves above-mentioned technical problem is:

The method is to create new mirror image according to the virtual machine partitions situation inquired；And according to needing to modify new mirror The subregion of picture；Former mirror image is replaced with new mirror image again.

The method includes the following steps:

Step 1: checking subregion service condition；

Step 2: creating new mirror image；

Step 3: modifying new mirrored partition；

Step 4: compressing new image file；

Step 5: replacing former mirror image using new mirror image；

Step 6: starting virtual machine；

Described checks subregion service condition, refers to the service condition for checking former mirrored partition, includes title, type, The mirror image is used with space, available space, total size and which virtual machine；

The type containing type has subregion, block device；

The subregion refers to disk partition.

The new mirror image of creation is the new image file for creating a size and former mirror image striking resemblances.

The new mirrored partition of modification, which refers to, all shuts down the virtual machine that former mirror image is used, then by former mirror image Information imported into inside new mirror image while modifying new mirrored partition size.

The new mirrored partition size of the modification refers to increase or reduces the size of mirrored partition；If desired mirror image is reduced Subregion, first judges whether available space is greater than the space of diminution, if so then execute mirror image partition size is reduced；Otherwise modification is shown Mirrored partition failure.

The new image file of compression refers to the actual size for compressing new image file；Image file is by increase Afterwards, authentic document size can expand automatically, at this time in order to save memory space, then need to compress the actual size of mirror image, compression The logic size of mirror image can't change afterwards.

Replacing former mirror image using new mirror image is that original mirror image is replaced by new mirror image, realizes mirrored partition modification.

The starting virtual machine is the virtual machine that starting uses the mirror image, and virtual machine will load repair during startup Mirrored partition after changing.

For the present invention by a kind of method for modifying virtual machine image subregion, mirrored partition, nothing can not be modified automatically by solving Method compression mirror image cannot come into force to the virtual machine that mirror image is used, can not reduce the problems such as mirror image partition size.The present invention is whole A process is full-automatic, does not need manual intervention, is different from general method.The method provided by the present invention can not only extend mirror image point The size in area can also reduce the size of mirrored partition, and a variety of granularities after being different from a kind of backup of virtual machine image grade are restored Method can not extend or reduce automatically subregion.The method provided by the present invention re-compresses mirror image after extending mirror image, guarantees mirror image Physics occupied space minimizes, and maximally utilizes memory space, is suitble to desktop cloud to the very high project of cost requirement, is different from one As method.The method provided by the present invention all uniformly comes into force to the virtual machine based on former mirror image, after restarting virtual machine, point of virtual machine Area's size becomes consistent after mirrored partition is modified, and helps adaptation project individual demand, is different from general method.

Detailed description of the invention

The following further describes the present invention with reference to the drawings:

Fig. 1 is flow chart of the present invention.

Specific embodiment

There are many embodiments of the present invention, illustrates one of implementation method, process by taking desktop cloud platform as an example here Figure is as shown in Figure 1, specific implementation process is as follows

1, check that subregion service condition, process are as follows:

1) information of file system is checked；

2) information of case of non-partitioned is filtered out, is left all to be partition information；

3) the virtual machine list based on former mirror image is inquired.

2, new mirror image is created, process is as follows:

1) size of former mirror image is obtained；

2) a new image file with former mirror image size striking resemblances is created.

3, new mirrored partition is modified, process is as follows:

1) all virtual machines based on former mirror image are closed；

2) judge modification mode, if reduction operation, then judge whether subregion available space is greater than the space of diminution, if Then continue, otherwise reports exception and the process that terminates；If extended operation, then whether host operating system current space available is judged New mirror image is created enough, if then continuing, otherwise reports exception and the process that terminates；

3) former mirror file system is imported into new image file while modifies mirrored partition size.

4, new image file is compressed, process is as follows:

1) by new mirror image boil down to qcow2 format；

2) actual size and logic size of new mirror image are checked；

3) whether decision logic size changes, and exception is reported if changing and the process that terminates.

5, former mirror image is replaced using new mirror image, process is as follows:

1) new be mirrored on mirror image server is uploaded；

2) virtual machine based on former mirror image is all uniformly revised as based on new mirror image.

6, start virtual machine, check the modified partition information of virtual machine.

Whole flow process terminates.

Claims

1. a method for revising virtual machine image partition, it is characterized in that: described method is to create new image according to the virtual machine partition situation inquired; And revise the partition of new image as needed; Replace original image with new image again .

2. method according to claim 1 is characterized in that: described method comprises the steps:

Step 1: Check the partition usage;

Step 2: Create a new image;

Step 3: Modify the new mirror partition;

Step 4: Compress the new image file;

Step 5: Use the new image to replace the original image;

Step 6: Start the virtual machine.

3. method according to claim 2 is characterized in that: described checking partition usage, refers to checking the usage of original mirror partition, including name, type, used space, available space, total size and which virtual machine is using the image;

The types described include partitions and block devices;

The mentioned partitions refer to disk partitions.

4 . The method according to claim 2 , wherein the creating a new image is to create a new image file whose size is exactly the same as that of the original image. 5 .

5. method according to claim 2 is characterized in that: described modification new image partition is to refer to the virtual machine that is using original image all shut down, then the information of original image is imported into the new image and simultaneously revises new image Partition size.

The modifying the size of the new mirror partition refers to increasing or reducing the size of the mirror partition; if the mirror partition needs to be reduced, first determine whether the available space is larger than the reduced space, and if so, perform the reduction of the mirror partition size; otherwise, it will display that the mirror partition modification failed.

6. method according to claim 2 is characterized in that: described compressing new image file refers to the actual size of compressing new image file; after image file increases, real file size can be expanded automatically, at this moment in order to save Storage space, you need to compress the actual size of the image, and the logical size of the image will not change after compression.

7 . The method according to claim 2 , wherein: replacing the original image with the new image is to replace the original image with the new image to realize the modification of the image partition. 8 .

8 . The method according to claim 1 , wherein the starting the virtual machine is to start the virtual machine using the image, and the virtual machine will load the modified image partition during the starting process. 9 .