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97 lines
2.4 KiB
Markdown
97 lines
2.4 KiB
Markdown
---
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title: Resize an existing virtual disk
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description:
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published: true
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date: 2022-01-31T13:20:51.295Z
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tags:
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editor: markdown
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dateCreated: 2021-11-13T11:41:29.087Z
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---
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# Resize a disk
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> *Instructions only applies to Linux guests.*
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{.is-info}
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## Background
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A virtual machine's disk may have to be resized, typically due to lack of space. This page explains how to do so.
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The process involves creating a new blank virtual disk of the desired size and grow the former disk into the new one.
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## Usage
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> *In-place expansion is not supported. A new disk of the desired size has to be created.*
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{.is-info}
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* *Move to the location that contains the existing image*
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```
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cd /var/lib/libvirt/images
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```
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* *Create a new disk image*
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Use the following command to create a disk of 15 GB called `phyllome-bigger.img`.
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```
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qemu-img create -f raw phyllome-bigger.img 15G
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```
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* *Expand the root partition*
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> *This command expects the root partition to be located on the vda3 partition. It has only been tested against the `ext4`filesystem.*
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{.is-warning}
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```
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virt-resize --expand /dev/vda3 phyllome.img phyllome-bigger.img
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```
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* *The following should appear*
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```
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[ 0.0] Examining phyllome.img
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**********
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Summary of changes:
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/dev/vda1: This partition will be left alone.
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/dev/vda2: This partition will be left alone.
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/dev/vda3: This partition will be resized from 5G to 15G. The
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filesystem ext4 on /dev/vda3 will be expanded using the ‘resize2fs’
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method.
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**********
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[ 2.1] Setting up initial partition table on phyllome-bigger.img
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[ 12.9] Copying /dev/vda1
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[ 13.1] Copying /dev/vda2
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[ 13.4] Copying /dev/vda3
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100% ⟦▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒⟧ 00:00
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[ 38.3] Expanding /dev/vda3 using the ‘resize2fs’ method
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Resize operation completed with no errors. Before deleting the old disk,
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carefully check that the resized disk boots and works correctly.
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```
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* *Switch to the new disk for your virtual machine*
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*To-do*
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## Resources
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As per the software description : "*qemu-img allows you to create, convert and modify images offline. It can handle all image formats supported by QEMU.*"
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* *Installation*
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On Fedora-related distributions, `virt-resize` is provided by the `guestfs-tools` package :
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```
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# dnf install guestfs-tools
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```
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---
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*[**Go to parent page**](https://wiki.phyllo.me/)* |