CN102981931A - Backup method and device for virtual machine - Google Patents

Abstract

The invention provides a virtual machine backup method and device. The method includes: acquiring information of at least one virtual machine on a physical machine; performing snapshot processing on the information of the virtual machine to generate a local snapshot file; uploading the local snapshot file to a cloud storage server, so that the cloud storage The local snapshot file is backed up in the server. The virtual machine backup method and device provided by the present invention, by taking a snapshot of the information of the virtual machine, upload the generated local snapshot file to the cloud storage server for backup, so that the snapshot of the virtual machine will not occupy a large amount of hard disk resources, and once the local If the hard disk fails, it will not affect the snapshot file of the virtual machine stored on the cloud storage server, so that the virtual machine built on the local hard disk can be quickly restored, and the interrupted business or data lost by the user can be restored.

Description

Virtual machine backup method and device

technical field

The invention relates to information technology, in particular to a virtual machine backup method and device.

Background technique

Virtualization technology is one of the most critical technologies in the era of cloud computing. Virtualization technology is to virtualize multiple operating systems on a physical machine, and these systems are so-called virtual machines. In an actual production environment, especially in a public cloud system, a virtual machine is created on the local hard disk of the physical server itself.

In the prior art, a virtual machine is established on a local hard disk, and after a snapshot backup is performed on the virtual machine, the snapshot of the virtual machine is stored on the local hard disk. However, in the prior art, a snapshot of a virtual machine occupies a large amount of hard disk resources, and once a local hard disk fails, the snapshot of the virtual machine stored thereon may be damaged.

Contents of the invention

The present invention provides a virtual machine backup method and device, which are used to solve the problem in the prior art that the snapshot of the virtual machine will occupy a large amount of hard disk resources. Once the local hard disk fails, the snapshot of the virtual machine stored on it may be damaged. question.

On the one hand, the present invention provides a kind of virtual machine backup method, comprising:

Obtain information about at least one virtual machine on the physical machine;

Perform snapshot processing on the information of the virtual machine to generate a local snapshot file;

uploading the local snapshot file to a cloud storage server, so that the cloud storage server backs up the local snapshot file.

In another aspect, the present invention provides a virtual machine backup device, including:

An acquisition module, configured to acquire information about at least one virtual machine on the physical machine;

A snapshot module, configured to perform snapshot processing on the information of the virtual machine to generate a local snapshot file;

An upload module, configured to upload the local snapshot file to a cloud storage server, so that the cloud storage server can back up the local snapshot file.

The virtual machine backup method and device provided by the present invention obtain the information of the virtual machine on the physical machine, take a snapshot of the information of the virtual machine, and upload the generated local snapshot file to the cloud storage server to back up the local snapshot file, The snapshot of the virtual machine will not take up a lot of hard disk resources, and once the local hard disk fails, it will not affect the snapshot file of the virtual machine stored on the cloud storage server, so that the virtual machine built on the local hard disk can be quickly restored, and the restoration is interrupted business or user data lost.

Description of drawings

FIG. 1 is a schematic flow diagram of an embodiment of a virtual machine backup method of the present invention;

Fig. 2 is a system structural framework diagram of an implementation scenario of the virtual backup method of the embodiment shown in Fig. 1;

FIG. 3 is a schematic flowchart of another embodiment of the virtual machine backup method of the present invention;

FIG. 4 is a schematic flowchart of another embodiment of the virtual machine backup method of the present invention;

FIG. 5 is a schematic structural diagram of an embodiment of a virtual machine backup device of the present invention;

FIG. 6 is a schematic structural diagram of another embodiment of a virtual machine backup device according to the present invention.

Detailed ways

The embodiment of the present invention is based on cloud storage, so as to realize the backup of the virtual machine.

Cloud storage is a technology extended and developed from the concept of cloud computing. It refers to the collection of a large number of different types of storage devices in the network through application software through functions such as cluster applications, grid technology, or distributed file systems. Work together to jointly provide data storage and business access functions. When the core of cloud computing system computing and processing is the storage and management of large amounts of data, a large number of storage devices need to be configured in the cloud computing system, then the cloud computing system will be transformed into a cloud storage system, so cloud storage is a data storage In the cloud computing system with management as the core, cloud storage is referred to as cloud storage server in the embodiment of the present invention.

A cloud storage server is a distributed storage system for object storage, which usually adopts a three-layer structure: storage layer, business layer, and interface layer. The storage layer adopts a highly flexible deployment and transparent management storage system, which can store massive files and index information. The so-called highly flexible deployment means that when the cloud storage server expands, a new node is added to the existing cloud storage server. The cloud storage server will automatically identify the machine and automatically distribute the data to the newly added node; the business layer mainly implements data management (authority, classification, status), intelligent association (multi-source fusion, indexing) and other functions The so-called multi-source integration means that no matter what kind of application (such as files, videos, pictures, audios, etc.) stores data on the cloud storage server, it is stored in the form of objects; and the interface layer provides application-oriented Application Programming Interface (API for short), the application programming interface API supports a relatively standard (SATA Revision 3.0, SATA3 or S3 for short) interface technology standard object-oriented storage interface.

The technical solution of the present invention will be described in further detail below through specific embodiments and accompanying drawings.

FIG. 1 is a schematic flowchart of an embodiment of a method for backing up a virtual machine according to the present invention. As shown in Figure 1, this embodiment describes the information backup process of a virtual machine. The subject of the following steps can be any physical machine in the server cluster, which can be specifically installed with virtualization software (such as VMware ESX) or XEN A physical machine of a virtualization platform, the method includes the following steps:

S101. Obtain information about at least one virtual machine on the physical machine;

Specifically, in a server cluster composed of large-scale servers, each physical machine can virtualize multiple virtual machines. When backing up a virtual machine, the information of the virtual machine on the physical machine can be obtained at a preset time point according to the needs of the user, so as to realize the backup of the virtual machine. The preset time point may be after each operation on the virtual machine is completed, or a fixed time point every day, such as after get off work every day.

The information of the virtual machine may be status information of the virtual machine, data information of the virtual machine, or memory information of the virtual machine.

S102, performing snapshot processing on the information of the virtual machine to generate a local snapshot file;

Specifically, the emergence of snapshot technology makes virtual machine backup easy to implement, especially for virtual machines built on shared storage, but for virtual machines built on local hard disks, snapshot processing of virtual machine information, If the generated local snapshot file is stored, it can only be stored on the local hard disk.

Among them, the snapshot processing can be specifically executed through the command line tool on the VMware ESX software console, and the information of the virtual machine is encapsulated into a local snapshot file.

S103. Upload the local snapshot file to the cloud storage server, so that the cloud storage server backs up the local snapshot file.

Specifically, the generated local snapshot file is uploaded to the cloud storage server through the application program interface API of the cloud storage server, and the local snapshot file is backed up in the cloud storage server to realize the backup of the virtual machine. Among them, the application program interface API can be a representational state transfer (Representational State Transfer, REST for short) Web server (Web Service), and a software development data package (Software Development Kit, SDK for short).

As a feasible implementation, the generated local snapshot file can be directly uploaded to the cloud storage server; as another feasible implementation, the generated local snapshot file can also be stored on the local hard disk first, and then downloaded from the local hard disk Upload the local snapshot file to the cloud storage server. After uploading, you can delete the local snapshot file stored on the local hard disk.

FIG. 2 is a system structural framework diagram of an implementation scenario of the virtual backup method in the embodiment shown in FIG. 1 . As shown in FIG. 2 , it includes a physical machine 21 , a server cluster 22 and a cloud storage server 23 . The physical machine 21 may be any physical machine in the server cluster 22 .

After the physical machine 21 obtains the information of at least one virtual machine thereon, it performs snapshot processing on the information of the virtual machine to generate a local snapshot file, and then uploads the local snapshot file to the cloud storage server 23, so that the backup in the cloud storage server 23 Local snapshot files.

The virtual machine backup method provided by the embodiment of the present invention obtains the information of the virtual machine on the physical machine, takes a snapshot of the information of the virtual machine, and uploads the generated local snapshot file to the cloud storage server to back up the local snapshot file, The snapshot of the virtual machine will not take up a lot of hard disk resources, and once the local hard disk fails, it will not affect the snapshot file of the virtual machine stored on the cloud storage server, so that the virtual machine built on the local hard disk can be quickly restored, and the restoration is interrupted business or user data lost.

FIG. 3 is a schematic flowchart of another embodiment of a virtual machine backup method according to the present invention. As shown in Figure 3, what this embodiment describes is the specific process of the virtual machine backup method of the embodiment shown in Figure 1 above, and the method includes the following steps:

S301. Obtain information about at least one virtual machine on the physical machine;

S302. Generate a virtual machine snapshot state table, the virtual machine snapshot state table includes at least one virtual machine identifier and corresponding snapshot state information; the virtual machine snapshot state table is shown in Table 1:

Table 1

Specifically, obtain the information of the virtual machine corresponding to a specific time point on the physical machine, the information of the virtual machine may include the data information of the virtual machine and/or the memory information of the virtual machine, record the number of virtual machines, and set the number of virtual machines as The number of snapshots and the number of transfers, generate an empty virtual machine snapshot state table. An empty virtual machine snapshot status table, including a virtual machine identifier (such as a virtual machine account ID) and corresponding snapshot status information. The snapshot state information may include the virtual machine snapshot name and state, wherein the virtual machine snapshot name and state are empty.

S303, performing snapshot processing on the information of the virtual machine to generate a local snapshot file;

S304, updating the virtual machine snapshot state table;

S305. Scan the snapshot state table of the virtual machine, and determine the unuploaded local snapshot files to be uploaded to the cloud storage server according to the snapshot state information;

S306. Upload the unuploaded local snapshot file to the cloud storage server, so that the cloud storage server backs up the local snapshot file.

Specifically, every time a virtual machine is snapshotted, a local snapshot file is generated, the number of snapshots is reduced by one, and it is judged whether the number of snapshots is 0, so as to continue or end the snapshotting of information of the next virtual machine. Obtain snapshot information, update the virtual machine snapshot state table, that is, write the snapshot information into the virtual machine snapshot state table, including writing the name and state of the virtual machine snapshot. Wherein, the virtual machine snapshot name includes the virtual machine account ID and time, which is the specific time point when the snapshot is generated; the initial state is represented by 0. Scan the virtual machine snapshot status table, and upload the local snapshot files corresponding to the unuploaded virtual machines, that is, the status is 0, to the cloud storage server; after the physical machine uploads the unuploaded local snapshot files to the cloud storage server, the virtual The machine snapshot state table is updated accordingly. Specifically, each time a local snapshot file is uploaded, the virtual machine snapshot state table is updated once, that is, the state of the corresponding virtual machine is set to 1, and the number of transfers is reduced by one to determine the number of transfers. Whether to 0 to continue or end the transfer of the next local snapshot file.

The virtual machine backup method provided by the embodiment of the present invention generates a virtual machine snapshot state table by acquiring information of the virtual machine on the physical machine, takes a snapshot of the information of the virtual machine, updates the virtual machine snapshot state table, scans the virtual machine snapshot state table, Upload the unuploaded local snapshot file to the cloud storage server according to the snapshot state information, to back up the local snapshot file, and update the virtual machine snapshot state table, so that the information of the virtual machine is snapshotted and the local snapshot file generated by uploading is uploaded It is more orderly, and the snapshot of the virtual machine will not occupy a lot of hard disk resources, and once the local hard disk fails, it will not affect the snapshot files of the virtual machine stored on the cloud storage server, so that the virtual machine created on the local hard disk can be quickly restored. computer to restore interrupted services or data lost by users.

FIG. 4 is a schematic flowchart of another embodiment of a virtual machine backup method according to the present invention. As shown in Figure 4, on the basis of the virtual machine backup method in the embodiment shown in Figure 1 or Figure 3, this embodiment further provides a fault recovery process during the execution of the virtual machine backup method, which can be shown in Figure 1 Or in real time in the virtual machine backup method of the embodiment shown in FIG. 3 . The method includes the following steps:

S401. Monitor at least one virtual machine;

Specifically, this step may be: monitoring network traffic and resource usage of the physical machine and at least one virtual machine on it.

Specifically, monitor the situation (for example: network traffic and/or resource usage) of at least one virtual machine and at least one physical machine in the same server cluster, and when the situation is abnormal (for example: network traffic and/or When the resource usage exceeds the set threshold), an alarm message will be sent through text messages or alarms, so that you can find out whether there is a problem that will cause the virtual machine to fail.

S402. If the virtual machine fails, obtain a backed up local snapshot file from the cloud storage server, and restore the virtual machine according to the backed up local snapshot file.

This step may specifically be: if the virtual machine fails, then determine the failed physical machine and at least one virtual machine on it; according to the determined physical machine and at least one virtual machine on it, from the Obtain the corresponding backup local snapshot file from the cloud storage server; restore at least one virtual machine on the failed physical machine according to the corresponding backup local snapshot file obtained from the cloud storage server.

Specifically, when there is a problem that will cause the virtual machine to fail (for example, the physical machine where the virtual machine is located or the local hard disk on the physical machine fails), request information can be sent to determine the object that needs to be restored, that is, which one on the physical machine or multiple virtual machines (when the physical machine where the virtual machine is located or the local hard disk on the physical machine fails, causing the virtual machine to fail, the object to be restored is multiple virtual machines on the failed physical machine), and the restored The location is the physical machine on which to restore these virtual machines, which can be restored on the original physical machine or on other physical machines in the same server cluster (when the physical machine where the virtual machine is located or the local hard disk on the physical machine fails, When the virtual machine fails, it can only be recovered on other physical machines in the same server cluster). Whether the hard disk fails can be detected locally through the physical machine, or the administrator can manually check whether the hard disk of each physical machine fails. According to the object to be restored and the restored location, the local snapshot files corresponding to the backups of these virtual machines can be obtained from the cloud storage server, and these virtual machines can be restored according to the backup snapshot files obtained from the cloud storage server. The recovery process can be recovered in batches or individually.

The virtual machine backup method provided by the embodiment of the present invention monitors the situation of the virtual machine and the physical machine where it is located in real time, and obtains the backup local snapshot file from the cloud storage server when the monitored virtual machine fails, so as to quickly Recover failed virtual machines and restore interrupted services or data lost by users.

FIG. 5 is a schematic structural diagram of an embodiment of a virtual machine backup device according to the present invention. As shown in FIG. 5 , the device includes: an acquisition module 51 , a snapshot module 52 and an upload module 53 .

Wherein, the acquiring module 51 is configured to acquire information of at least one virtual machine on the physical machine;

Specifically, in a server cluster composed of large-scale servers, each physical machine can virtualize multiple virtual machines. When backing up the virtual machine, the acquisition module 51 can acquire the information of the virtual machine on the physical machine at a preset time point according to the needs of the user, so as to realize the backup of the virtual machine. The preset time point may be after each operation on the virtual machine is completed, or a fixed time point every day, such as after get off work every day.

Wherein, the information of the virtual machine may be state information of the virtual machine, data information of the virtual machine or memory information of the virtual machine.

The snapshot module 52 is configured to perform snapshot processing on the information of the virtual machine acquired by the acquisition module 51 to generate a local snapshot file;

Specifically, the emergence of snapshot technology makes it easy to back up virtual machines, especially for virtual machines built on shared storage, but for virtual machines built on local hard disks, the snapshot module 52 acquires the The information of the virtual machine is used for snapshot processing, and the generated local snapshot file can only be stored on the local hard disk if stored.

Wherein, the snapshot processing can specifically be: the snapshot module 52 executes the snapshot processing through the instruction line tool on the VMware ESX software console, and encapsulates the information of the virtual machine into a local snapshot file.

The upload module 53 is configured to upload the local snapshot file generated by the snapshot module 52 to the cloud storage server, so that the cloud storage server can back up the local snapshot file.

Specifically, the upload module 53 uploads the local snapshot file generated by the snapshot module 52 to the cloud storage server through the API of the cloud storage server, and backs up the local snapshot file in the cloud storage server to realize the backup of the virtual machine. Among them, the API can be REST Web Service, SDK, etc.

As a feasible implementation manner, the upload module 53 can directly upload the local snapshot file generated by the snapshot module 52 to the cloud storage server; as another feasible implementation manner, the upload module 53 can also upload the local snapshot file generated by the snapshot module 52 The files are stored on the local hard disk first, and then the local snapshot files are uploaded to the cloud storage server from the local hard disk. After uploading, the local snapshot files stored on the local hard disk can be deleted.

The virtual machine backup device provided by the embodiment of the present invention performs a snapshot of the information of the virtual machine acquired by the acquisition module 51 through the snapshot module 52, and uploads the local snapshot file generated by the snapshot module 52 to the cloud storage server through the upload module 53, To back up the local snapshot file, so that the snapshot of the virtual machine will not occupy a large amount of hard disk resources, and once the local hard disk fails, it will not affect the snapshot file of the virtual machine stored on the cloud storage server, so that the snapshot file created on the local hard disk can be quickly restored The above virtual machine restores interrupted services or data lost by users.

FIG. 6 is a schematic structural diagram of another embodiment of a virtual machine backup device according to the present invention. As shown in FIG. 6 , the device includes: an acquisition module 51 , a snapshot module 52 , an upload module 53 , a monitoring module 54 and a recovery module 55 .

Wherein, the acquiring module 51 is configured to acquire information of at least one virtual machine on the physical machine; generate a virtual machine snapshot status table, and the virtual machine snapshot status table includes an identifier of at least one virtual machine and corresponding snapshot status information. The virtual machine snapshot state table is shown in Table 1 in the embodiment shown in FIG. 3 above.

Specifically, the acquiring module 51 acquires the information of the virtual machine corresponding to a specific time point on the physical machine, the information of the virtual machine may include the data information of the virtual machine and/or the memory information of the virtual machine, record the number of the virtual machine, and store the information of the virtual machine Amount is set to the number of snapshots and the number of transfers, resulting in an empty virtual machine snapshot state table. An empty virtual machine snapshot status table, including a virtual machine identifier (such as a virtual machine account ID) and corresponding snapshot status information. The snapshot state information may include the virtual machine snapshot name and state, wherein the virtual machine snapshot name and state are empty.

The snapshot module 52 is used to perform snapshot processing on the information of the virtual machine obtained by the acquisition module 51, and generate a local snapshot file; update the virtual machine snapshot state table; scan the virtual machine snapshot state table, and determine according to the snapshot state information to be uploaded to the The local snapshot file in the cloud storage server has not been uploaded.

The upload module 53 is used for uploading the local snapshot file generated by the snapshot module 52 and not uploaded to the cloud storage server, so that the local snapshot file is backed up in the cloud storage server;

Specifically, the snapshot module 52 generates a local snapshot file for each snapshot of information of a virtual machine, decreases the number of snapshots by one, and determines whether the number of snapshots is 0, so as to continue or end the snapshot of information of the next virtual machine. The snapshot module 52 obtains snapshot information, updates the virtual machine snapshot state table, and writes the snapshot information into the virtual machine snapshot state table, including writing the name and state of the virtual machine snapshot. Wherein, the virtual machine snapshot name includes the virtual machine account ID and time, which is the specific time point when the snapshot is generated; the initial state is represented by 0. The snapshot module 52 scans the updated virtual machine snapshot state table, and determines the local snapshot file corresponding to the virtual machine whose status is 0 as the local snapshot file to be uploaded; the upload module 53 uploads the local snapshot file to be uploaded determined by the snapshot module 52 to the cloud storage server. Each time the upload module 53 uploads a local snapshot file, the snapshot module 52 updates the virtual machine snapshot state table once, that is, the state of the corresponding virtual machine is set to 1, and at the same time, the number of transfers is reduced by one, and it is judged whether the number of transfers is 0 to continue Or end the transfer of the next local snapshot file.

A monitoring module 54, configured to monitor at least one virtual machine. Specifically, it can be used for: monitoring the network traffic and resource usage of the physical machine and at least one virtual machine on it.

Specifically, the monitoring module 54 monitors the situation (for example: network traffic and/or resource usage) of at least one virtual machine and at least one physical machine in the same server cluster, and when the situation is abnormal (for example: network traffic and/or the resource usage exceeds the set threshold), an alarm message will be sent via text message or alarm, so that you can find out whether there is a problem that will cause the virtual machine to fail.

The recovery module 55 is configured to obtain a backed up local snapshot file from the cloud storage server if the virtual machine fails, and restore the virtual machine according to the backed up local snapshot file. Specifically, it can be used for: if the virtual machine fails, then determine the failed physical machine and at least one virtual machine on it; according to the determined failed physical machine and at least one virtual machine on it, from the cloud storage server Acquiring a corresponding backup local snapshot file; recovering at least one virtual machine on the failed physical machine according to the corresponding backup local snapshot file obtained from the cloud storage server.

Specifically, when there is a problem that will cause the virtual machine to fail (for example, the physical machine where the virtual machine is located or the local hard disk on the physical machine fails), the recovery module 55 can send request information to determine the object that needs to be restored, that is, which physical One or more virtual machines on the virtual machine (when the physical machine where the virtual machine is located or the local hard disk on the physical machine fails, causing the virtual machine to fail, the objects that need to be restored are multiple virtual machines on the failed physical machine), And the recovery location, that is, on which physical machine to restore these virtual machines, it can be restored on the original physical machine, or on other physical machines in the same server cluster (when the physical machine where the virtual machine is located or the local hard disk on the physical machine When a failure occurs and the virtual machine fails, it can only be recovered on other physical machines in the same server cluster). Whether the hard disk fails can be detected locally through the physical machine, or the administrator can manually check whether the hard disk of each physical machine fails. Restoration module 55 can obtain the local snapshot files corresponding to the backups of these virtual machines from the cloud storage server according to the specified objects to be restored and the restored locations, and according to these backup snapshot files obtained from the cloud storage server, perform these Virtual machines can be restored, and the restoration process can be restored in batches or individually.

The virtual machine backup device provided by the embodiment of the present invention monitors the situation of the virtual machine and its physical machine in real time through the monitoring module 54, and when the monitored virtual machine fails, the recovery module 55 obtains the backup local Snapshot files, so that a failed virtual machine can be quickly restored, and interrupted services or data lost by users can be restored.

Those of ordinary skill in the art can understand that all or part of the steps for implementing the above method embodiments can be completed by program instructions and related hardware. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps including the above-mentioned 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 embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (11)

1. a virtual machine backup method is characterized in that, comprising:

Obtain the information of at least one virtual machine on the physical machine;

The information of described virtual machine is carried out snapshot process, generate local snapshot document;

Described local express is shone File Upload in the cloud storage server, so that the described local snapshot document of backup in the described cloud storage server.

2. virtual machine backup method according to claim 1 is characterized in that, after the described information of obtaining at least one virtual machine on the physical machine, also comprises:

Generating virtual machines snapshot state table comprises the sign of described at least one virtual machine and the snapshot state information of correspondence thereof in the described virtual machine snapshot state table;

Described information to described virtual machine carries out also comprising after the snapshot processing:

Upgrade described virtual machine snapshot state table;

Scan described virtual machine snapshot state table, determine to be uploadedly in described cloud storage server, not upload local snapshot document according to described snapshot state information.

3. virtual machine backup method according to claim 1 and 2 is characterized in that, the information of described virtual machine comprises: the data message of virtual machine and/or the memory information of virtual machine.

4. virtual machine backup method according to claim 1 and 2 is characterized in that, also comprises:

Described at least one virtual machine is monitored;

If described virtual machine breaks down, then from described cloud storage server, obtain the described local snapshot document of backup, and according to the described local snapshot document of backup described virtual machine is recovered.

5. virtual machine backup method according to claim 4 is characterized in that, the described described local snapshot document that from described cloud storage server, obtains backup, and according to the backup described local snapshot document described virtual machine is recovered, be specially:

Determine the physical machine that breaks down and at least one virtual machine;

According to the determined described physical machine that breaks down and at least one virtual machine, obtain the described local snapshot document of corresponding backup from described cloud storage server;

Described local snapshot document according to the correspondence backup of obtaining from described cloud storage server recovers at least one virtual machine on the described physical machine that breaks down.

6. virtual machine backup method according to claim 4 is characterized in that, described described at least one virtual machine is monitored, and is specially:

To described physical machine and on network traffics and the resource utilization of at least one described virtual machine monitor.

7. a virtual machine back-up device is characterized in that, comprising:

Acquisition module is for the information of obtaining at least one virtual machine on the physical machine;

Snapshot module is used for that the information of described virtual machine is carried out snapshot and processes, and generates local snapshot document;

Upper transmission module is used for described local express is shone File Upload to the cloud storage server, so that the described local snapshot document of backup in the described cloud storage server.

8. virtual machine back-up device according to claim 7, it is characterized in that, described acquisition module also is used for: after the information of at least one virtual machine on obtaining physical machine, generating virtual machines snapshot state table comprises the sign of described at least one virtual machine and the snapshot state information of correspondence thereof in the described virtual machine snapshot state table;

Described snapshot module also is used for: the information of described virtual machine is carried out upgrading described virtual machine snapshot state table after snapshot processes; Scan described virtual machine snapshot state table, determine to be uploadedly in described cloud storage server, not upload local snapshot document according to described snapshot state information.

9. according to claim 7 or 8 described virtual machine back-up devices, it is characterized in that, also comprise:

Monitoring module is used for described at least one virtual machine is monitored;

Recover module, break down if be used for described virtual machine, then from described cloud storage server, obtain the described local snapshot document of backup, and according to the described local snapshot document of backup described virtual machine is recovered.

10. virtual machine back-up device according to claim 9 is characterized in that, described recovery module specifically is used for:

If described virtual machine breaks down, then determine the physical machine that breaks down and at least one virtual machine; According to the determined described physical machine that breaks down and at least one virtual machine, obtain the described local snapshot document of corresponding backup from described cloud storage server; Described local snapshot document according to the correspondence backup of obtaining from described cloud storage server recovers at least one virtual machine on the described physical machine that breaks down.

11. virtual machine back-up device according to claim 9 is characterized in that, described monitoring module specifically is used for:

To described physical machine and on network traffics and the resource utilization of at least one described virtual machine monitor.

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