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docs: update resize

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Lukas à Porta 2021-09-10 09:35:00 +00:00 committed by lukas
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@ -2,7 +2,7 @@
title: Resize a guest disk image
description: Resize a a guest disk image using qemu-img and virt-resize
published: true
date: 2021-08-12T12:17:26.497Z
date: 2021-09-10T09:34:56.872Z
tags:
editor: markdown
dateCreated: 2021-08-12T10:55:58.877Z
@ -16,19 +16,29 @@ As per the software description : "*qemu-img allows you to create, convert and m
Expanding a new disk implies creating a new blank image of the desired size and "copy" the existing disk into this new bigger image using virt-resize.
> In-place expansion is not supported.
{.is-info}
## Usage
* Create the new disk phyllome_but_bigger.img of the desired size. In this case, it is 15 GiB
* **Create a new disk image**
In-place expansion is not supported. A new disk of the desired size has to be created.
Use the following command to create `phyllome_but_bigger.img`, a disk of 15 GiB
```
$ qemu-img create -f raw /var/lib/libvirt/images/phyllome-bigger.img 15G
$ qemu-img create -f raw phyllome-bigger.img 15G
```
* Expand the root partition on the disk.
* **Expand the root partition**
> This command only works if the root partition is located on vda3 and if the disk image filesystem uses EXT4.
{.is-warning}
This command bellow requires root privileges.
```
# virt-resize --expand /dev/vda3 phyllome.img phyllome_but_bigger.img
@ -57,3 +67,6 @@ Resize operation completed with no errors. Before deleting the old disk,
carefully check that the resized disk boots and works correctly.
```
* **Inform your virtual machine to use the new disk**
*To-do*