Remote online backup method for virtual machine

A remote backup and virtual machine technology, applied in the field of remote online backup of virtual machines, can solve problems such as business interruption, waste of storage space, and inability to restore virtual machines, and achieve the effect of avoiding waste and saving storage space.

Inactive Publication Date: 2016-03-02
G CLOUD TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The technical problem solved by the present invention is to provide a method for remote online backup of a virtual machine, which solves the problems that the virtual...

Method used

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  • Remote online backup method for virtual machine

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Embodiment Construction

[0034] See figure 1 Shown, the steps of the present invention have:

[0035] 1. Configure ssh to log in to the remote backup server without a password

[0036] First execute on the backup node: ssh-keygen to generate a key.

[0037] Then execute: ssh-copy-idroot@node to distribute the key to the remote backup server node, where node needs to be replaced with the id of the remote backup server.

[0038] 2. Pause the virtual machine backend io read and write

[0039] The command is: virshsuspend virtual machine id

[0040] 3. Use the qemu tool to read the actual size occupied by the virtual machine block device

[0041] The command is: ['qemu-img', 'check', mountpoint], where mountpoint refers to the specific block device path, such as: / instances / disk / 973ce914421d9c979ee850615158 / i-4206407D / i-4206407D_snap

[0042] 4. Use the dd command to specify the size to copy the virtual machine block device to a temporary file

[0043] The command is: ['dd','if='+src,'of='+dst,'bs='...

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Abstract

The invention relates to the technical field of virtual machine backup, and more particularly to a remote online backup method for a virtual machine. According to the method, a remote backup server needs to be prepared firstly, and virtual machine rear input output (IO) read and write are stopped temporarily in backup; practical occupation size of a virtual machine block device is read by use of a qemu tool chain; the size is determined by use of a dd command so as to copy the virtual machine block device to a temporary file; the temporary file is copied to a remote backup server by use of an rsync tool; and finally, the virtual machine rear IO read and write are recovered, and the temporary file is deleted, then remote backup is finished. After the virtual machine or a host machine fails, the virtual machine cannot recover; the business is interrupted in virtual machine backup, and the storage space is wasted. The remote online backup method for the virtual machine overcomes the above defects, and is applicable to remote online backup of the virtual machine.

Description

technical field [0001] The invention relates to the technical field of virtual machine backup, in particular to a method for remote online backup of a virtual machine. Background technique [0002] On cloud computing platforms, backup and recovery of virtual machines is essential, and snapshots and backups are commonly used. Among them, the snapshot method has outstanding advantages: [0003] 1. Online snapshot can be realized without shutting down; [0004] 2. Incremental snapshots can be realized, saving storage space, and the speed is very fast; [0005] However, the biggest disadvantage of the snapshot method is that it is strongly related to the virtual machine and is not independent of each other. When the virtual machine fails or the host machine fails, the snapshot cannot be restored. [0006] In addition, for backup, the general process is: [0007] 1. Shut down the virtual machine; [0008] 2. Copy the image file of the virtual machine instance as a backup fil...

Claims

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Application Information

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IPC IPC(8): H04L29/08
CPCH04L67/1095
Inventor 温金花杨松季统凯
Owner G CLOUD TECH
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