Method and device for expanding capacity of virtual disk

Abstract

The invention discloses a method for expanding the capacity of a virtual disk, which includes the following steps: creating a virtual disk file according to a preset system image and a target disk capacity value contained in a received capacity expansion request; mounting the virtual disk file to a physical host, and generating a corresponding virtual disk; reading the partition information of thevirtual disk; deleting a to-be-expanded partition of the virtual disk, and creating a new partition according to the partition capacity value and the expansion value of the to-be-expanded partition;and reading the file system of the virtual disk, and expanding the capacity of the file system to make the file system adapt to the new partition. The method for expanding the capacity of a virtual disk is implemented based on a physical host, shortens the I / O path, and improves the I / O efficiency. Meanwhile, there is no need to start a virtual machine on a physical host in the capacity expansionprocess of a virtual disk, the capacity is expanded before the startup of the virtual machine, and the technological complexity and the coupling degree are reduced.

Description

technical field [0001] The present application relates to the technical field of virtualization, in particular to a method for expanding the capacity of a virtual disk. The present application also relates to a device for expanding the capacity of a virtual disk, and an electronic device. Background technique [0002] In the elastic computing cloud, the cloud provider will provide a series of system images for each operating system platform. In practical applications, the provided system images are used to create virtual disks and virtual machines (Virtual Machine, VM), and finally in The operating system (GuestOS) is loaded on the virtual machine. For the cloud provider, since the capacity value range of the virtual disk is too large, for example, from 100G unit level to 10T or even 100T unit level virtual disk, the number of system images provided by the cloud provider is limited, based on these system The capacity value of the virtual disk created by the image is also l...

AI Technical Summary

Problems solved by technology

[0008] This application provides a method for expanding the capacity of a virtual disk to solve the problems of low feasibility and high technical complexity in the prior art

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