docs: update gofurther/resize

gofurther/resize.md

@@ -2,11 +2,78 @@
 title: Resize an existing virtual disk
 description: 
 published: true
-date: 2021-11-13T11:41:29.087Z
+date: 2021-11-13T17:49:11.922Z
 tags: 
 editor: markdown
 dateCreated: 2021-11-13T11:41:29.087Z
 ---
 
-# Header
-Your content here
+# Resize a disk
+
+## Introduction
+
+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.*"
+
+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, which mean than a copy of the disk to be expanded has to be created
+{.is-info}
+ 
+## Installation
+
+* On Fedora-related distributions, `virt-resize` is provided by the `guestfs-tools` package : 
+
+```
+# dnf install guestfs-tools
+```
+
+## Usage
+
+* **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 phyllome-bigger.img 15G
+```
+
+* **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
+
+[   0.0] Examining phyllome.img
+**********
+
+Summary of changes:
+
+/dev/vda1: This partition will be left alone.
+
+/dev/vda2: This partition will be left alone.
+
+/dev/vda3: This partition will be resized from 5G to 15G.  The 
+filesystem ext4 on /dev/vda3 will be expanded using the ‘resize2fs’ 
+method.
+
+**********
+[   2.1] Setting up initial partition table on phyllome-bigger.img
+[  12.9] Copying /dev/vda1
+[  13.1] Copying /dev/vda2
+[  13.4] Copying /dev/vda3
+ 100% ⟦▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒⟧ 00:00
+[  38.3] Expanding /dev/vda3 using the ‘resize2fs’ method
+
+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*