CN105511938A - Virtual disk construction method - Google Patents
Virtual disk construction method Download PDFInfo
- Publication number
- CN105511938A CN105511938A CN201510821450.1A CN201510821450A CN105511938A CN 105511938 A CN105511938 A CN 105511938A CN 201510821450 A CN201510821450 A CN 201510821450A CN 105511938 A CN105511938 A CN 105511938A
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- CN
- China
- Prior art keywords
- block device
- virtual disk
- disk
- virtual
- virtual machine
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/455—Emulation; Interpretation; Software simulation, e.g. virtualisation or emulation of application or operating system execution engines
- G06F9/45533—Hypervisors; Virtual machine monitors
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/455—Emulation; Interpretation; Software simulation, e.g. virtualisation or emulation of application or operating system execution engines
- G06F9/45533—Hypervisors; Virtual machine monitors
- G06F9/45558—Hypervisor-specific management and integration aspects
- G06F2009/45579—I/O management, e.g. providing access to device drivers or storage
Abstract
The invention relates to the technical field of virtual machine disks and in particular relates to a virtual disk construction method combining advantages of block devices and virtual disk file formats. A block device is first prepared; the block device has unlimited realization methods; a qcow2 format file is built in the block device via a qemu tool chain; a path of the block device is configured to a virtual disk path configuration item of the virtual machine; the equipment format of the virtual machine disk is configured to a qcow2 format; and virtual disk building and virtual machine construction are finished and the virtual disk is operated as needed. Problems of virtual disk building due to the individual use of virtual disk file format or individual use of block device can be avoided; and the virtual disk construction method is suitable for virtual disk building of various types of storage systems.
Description
Technical field
The present invention relates to magnetic disk of virtual machine technical field, particularly the virtual disk construction method of a kind of combined block equipment and virtual disk files form advantage.
Background technology
If the mode being used alone virtual disk files form creates and uses virtual disk, its great advantage to use as required, conserve space, and form is flexible, but can bring following problem:
One is that virtual disk is placed in file system, and read-write efficiency is relatively low;
Two is share inconvenience, if want to share, needs to use third party's network file system(NFS) as nfs, can increase the complicacy of system like this, increase the burden of O&M;
If directly use the mode of block device create and use virtual disk, its great advantage is that read-write efficiency is high, and it is convenient to share, but can bring following problem:
One is wasting space, because it is exactly the size that virtual disk defines that block device format creates the actual space taken after file system, even if what content there all is not write inside disk, is also to take the space that exceedes actual write size of data.
Two be storing the data on disk, snapshot, backup, the operation such as packing time because operation be data on whole block device, so special wasting space and time.
Three is the various dirigibilities lacking virtual disk form, the mutual conversion such as between different-format.
Be used alone qcow2 filesystem manner or be used alone block device mode to create and use virtual disk, there is respective merits and demerits, no matter use which kind of mode, there is its limitation, need to look for a kind of method, make the use of virtual disk have the advantage of these two kinds of modes simultaneously, and evade the shortcoming of these two kinds of modes.
Summary of the invention
The technical matters that the present invention solves is to provide a kind of virtual disk construction method; Combined block equipment and virtual disk files form advantage, solve the problem that the mode being used alone virtual disk files form or the mode being used alone block device use virtual disk to bring.
The technical scheme that the present invention solves the problem, comprises the following steps:
Described method comprises the steps:
Step 1: prepare a block device, block device implementation is not limit;
Step 2: use qemu tools chain to create the file of a qcow2 form on block device;
Step 3: the path configurations of this block device enter in the disk path configurations item of virtual machine;
Step 4: the device format of magnetic disk of virtual machine is configured to qcow2 form;
Step 5: complete establishment, can operate virtual disk on demand.
Described block device from dissimilar storage system, can store as SAN or creates a block device in distributed memory system and be mapped on local path.
Use command format qemu-imgcreate-fqcow2/path/to/block_devsizeG, block device creates the file of a qcow2 form.
Source parameter inside amendment virtual machine configuration, the disk path of configuring virtual machine, as: <sourcefile='/dev/rbd/volumes/volume-xxxxxxxxxxx '/>; The path configurations of this block device enter in the disk path configurations item of virtual machine;
Amendment driver parameter, as: <drivername=' qemu ' type=' qcow2 ' cache=' none '/>; The device format of magnetic disk of virtual machine is configured to qcow2 form.
The invention provides the virtual disk use-pattern of a kind of combined block equipment and virtual disk files form advantage, by creating virtual disk than these the two kinds of modes of methods combining being easier to realize, the various problems that the mode that is used alone is brought successfully are evaded, make virtual disk have the advantage of virtual disk files format disc and block device disk simultaneously, not only conserve space, convenient shared, form is flexible, transmission speed is faster, also improves the stability of system and reduces maintenance cost.The present invention can be applicable to dissimilar storage system, and such as SAN stores or distributed memory system, realizes simple.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further described:
Fig. 1 is FB(flow block) of the present invention.
Embodiment
As shown in Figure 1, enforcement of the present invention comprises the following steps:
1, use qemu tools chain on block device, create the file of a qcow2 form, order as follows;
qemu-imgcreate-fqcow2/dev/rbd/volume-xxxxx100G
Wherein/dev/rbd/volume-xxxxx refers to the path of block device
2, the path configurations of block device enter in the disk path configurations item of virtual machine, this writes libvirt.xml, and code is as follows;
After completing, parameter value following (noticing that this path is being flexible coupling to actual block equipment) in configuration file:
<sourcefile＝′/instances/disk/1cb99ecb01c548bfbe684fa4d095338f/i-61283E03/i-61283E03_snap′/>；
3, the device format of magnetic disk of virtual machine is configured to qcow2 form, orders as follows;
qemu-imgcreate-bbFile-fformatdisksizeGB
The mirror image that wherein parameter: bFile refers to; The system disk that disk refers to; The system disk size that sizeGB refers to.
After completing, in configuration file, parameter value is as follows:
<drivername＝′qemu′type＝′qcow2′cache＝′none′/>。
Claims (5)
1. a virtual disk construction method, is characterized in that: described method comprises the steps:
Step 1: prepare a block device, block device implementation is not limit;
Step 2: use qemu tools chain to create the file of a qcow2 form on block device;
Step 3: the path configurations of this block device enter in the disk path configurations item of virtual machine;
Step 4: the device format of magnetic disk of virtual machine is configured to qcow2 form;
Step 5: complete establishment, can operate virtual disk on demand.
2. the virtual disk construction method according to right 1, is characterized in that: described block device from dissimilar storage system, can store as SAN or create a block device in distributed memory system and be mapped on local path.
3. the virtual disk construction method according to right 1, is characterized in that: use command format qemu-imgcreate-fqcow2/path/to/block_devsizeG, and block device creates the file of a qcow2 form.
4. the virtual disk construction method according to right 2, is characterized in that: use command format qemu-imgcreate-fqcow2/path/to/block_devsizeG, and block device creates the file of a qcow2 form.
5. the virtual disk construction method according to any one of right 1 to 4, it is characterized in that: the source parameter inside amendment virtual machine configuration, the disk path of configuring virtual machine, as: <sourcefile='/dev/rbd/volumes/volume-xxxxxx xxxxx'/>; The path configurations of this block device enter in the disk path configurations item of virtual machine;
Amendment driver parameter, as: <drivername='qemu'type='qcow2'cache='none'/ >; The device format of magnetic disk of virtual machine is configured to qcow2 form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510821450.1A CN105511938A (en) | 2015-11-23 | 2015-11-23 | Virtual disk construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510821450.1A CN105511938A (en) | 2015-11-23 | 2015-11-23 | Virtual disk construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105511938A true CN105511938A (en) | 2016-04-20 |
Family
ID=55719945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510821450.1A Withdrawn CN105511938A (en) | 2015-11-23 | 2015-11-23 | Virtual disk construction method |
Country Status (1)
| Country | Link |
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| CN (1) | CN105511938A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107544751A (en) * | 2017-05-17 | 2018-01-05 | 新华三云计算技术有限公司 | A kind of method and apparatus for remotely accessing disk |
| CN108228108A (en) * | 2018-01-04 | 2018-06-29 | 西安雷风电子科技有限公司 | A kind of difference virtual disk link method |
| CN109101323A (en) * | 2018-09-10 | 2018-12-28 | 南京铱迅信息技术股份有限公司 | Snapshot implementing method based on qcow2 format under virtual machine operating status |
| CN114968128A (en) * | 2022-07-28 | 2022-08-30 | 云宏信息科技股份有限公司 | Qcow 2-based virtual disk mapping method, system and medium |
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| CN102375695A (en) * | 2010-08-23 | 2012-03-14 | 联想(北京)有限公司 | Disc accessing method and computer system |
| US8195866B2 (en) * | 2007-04-26 | 2012-06-05 | Vmware, Inc. | Adjusting available persistent storage during execution in a virtual computer system |
| CN103593226A (en) * | 2013-11-04 | 2014-02-19 | 国云科技股份有限公司 | Method for improving IO performance of disc of virtual machine |
| CN104375877A (en) * | 2014-10-15 | 2015-02-25 | 国云科技股份有限公司 | Virtual machine online snapshot generating and deleting method |
-
2015
- 2015-11-23 CN CN201510821450.1A patent/CN105511938A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8195866B2 (en) * | 2007-04-26 | 2012-06-05 | Vmware, Inc. | Adjusting available persistent storage during execution in a virtual computer system |
| CN102375695A (en) * | 2010-08-23 | 2012-03-14 | 联想(北京)有限公司 | Disc accessing method and computer system |
| CN103593226A (en) * | 2013-11-04 | 2014-02-19 | 国云科技股份有限公司 | Method for improving IO performance of disc of virtual machine |
| CN104375877A (en) * | 2014-10-15 | 2015-02-25 | 国云科技股份有限公司 | Virtual machine online snapshot generating and deleting method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107544751A (en) * | 2017-05-17 | 2018-01-05 | 新华三云计算技术有限公司 | A kind of method and apparatus for remotely accessing disk |
| CN108228108A (en) * | 2018-01-04 | 2018-06-29 | 西安雷风电子科技有限公司 | A kind of difference virtual disk link method |
| CN109101323A (en) * | 2018-09-10 | 2018-12-28 | 南京铱迅信息技术股份有限公司 | Snapshot implementing method based on qcow2 format under virtual machine operating status |
| CN114968128A (en) * | 2022-07-28 | 2022-08-30 | 云宏信息科技股份有限公司 | Qcow 2-based virtual disk mapping method, system and medium |
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Application publication date: 20160420 |