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Translated with www.DeepL.com/Translator (free version)For the realization of this practice you will need an Ubuntu Cloud image that we will download from https://cloud-images.ubuntu.com/ and we will need a
 +
host system with Ubuntu 18.04.
 +
 
 +
In this practice we will use the image downloaded from the Ubuntu Cloud website and we will use the '''cloud-init''' tool to configure it.
 +
 
 +
Next, we will use the Ubuntu image already configured to be imported to the virtualization software '''libvirt''''.
 +
 
 +
= Step 1: Downloading the Ubuntu Cloud image
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 +
We enter https://cloud-images.ubuntu.com/ and download the Ubuntu 18.04 LTS (Long Time Support) image.
 +
 
 +
You can download it directly with the command ''wget'':
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<syntaxhighlight lang="bash">
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wget https://cloud-images.ubuntu.com/bionic/current/bionic-server-cloudimg-amd64.img
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</syntaxhighlight>
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if it started downloading you will see output similar to this:
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 +
<syntaxhighlight lang="bash">
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-2019-08-06 12:26:26-- https://cloud-images.ubuntu.com/bionic/current/bionic-server-cloudimg-amd64.img
 +
Resolving cloud-images.ubuntu.com (cloud-images.ubuntu.com).... 91.189.88.89, 2001:67c:1560:8001::8001
 +
Connecting to cloud-images.ubuntu.com (cloud-images.ubuntu.com)[91.189.88.89]:443... connected.
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HTTP request sent, waiting for response... 200 OK
 +
Length: 343474176 (328M) [application/octet-stream] [application/octet-stream] [application/octet-stream]...
 +
Saving to: "bionic-server-cloudimg-amd64.img"
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bionic-server-cloudimg-amd64.img. 0%[ ] 2.21M 472KB/s eta 14m 6s
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</syntaxhighlight>
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Wait until the image is 100% downloaded.
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 +
The Ubuntu cloud image comes with 2 GBytes of space by default, you can expand the size with the following command before using it in the virtual machine:
 +
 
 +
<syntaxhighlight lang="bash">
 +
qemu-img resize bionic-server-cloudimg-amd64.img +8G
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</syntaxhighlight>
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This increases the image by 8 Gbytes, so you are left with a 10 GByte Ubuntu cloud image.
 +
 
 +
= Step 3: Installing the libguestfs package =
 +
 
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Next, you have to install the [[packages]] that provide the ''virt-customize'' tool to configure the Ubuntu image you downloaded.
 +
 
 +
We can install these packages with the '''apt'''' tool from the shell.
 +
 
 +
For Ubuntu 18.04:
 +
 
 +
<syntaxhighlight lang="bash">
 +
sudo apt install libguestfs
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</syntaxhighlight>
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 +
For Ubuntu 20.04:
 +
 
 +
<syntaxhighlight lang="bash">
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sudo apt install libguestfs-tools
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</syntaxhighlight>
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''On the practice classroom computers these packages will already be pre-installed, so you can skip this step.''
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= Step 3: Configuring the Ubuntu image with virt-customize =
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 +
The ''virt-customize'' command allows you to set the password of the administrator user of the image we have downloaded.
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 +
<syntaxhighlight lang="bash">
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virt-customize -a bionic-server-cloudimg-amd64.img --root-password password:coolpass
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</syntaxhighlight>
 +
 
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The above example shows how to configure the downloaded image to have the user ''root'', and in this case, the password is ''coolpass''.

Revisión del 15:53 23 nov 2021

For the realization of this practice you will need an Ubuntu Cloud image that we will download from https://cloud-images.ubuntu.com/ and we will need a host system with Ubuntu 18.04.

In this practice we will use the image downloaded from the Ubuntu Cloud website and we will use the cloud-init tool to configure it.

Next, we will use the Ubuntu image already configured to be imported to the virtualization software libvirt'.

= Step 1: Downloading the Ubuntu Cloud image

We enter https://cloud-images.ubuntu.com/ and download the Ubuntu 18.04 LTS (Long Time Support) image.

You can download it directly with the command wget: 

wget https://cloud-images.ubuntu.com/bionic/current/bionic-server-cloudimg-amd64.img

if it started downloading you will see output similar to this: 

-2019-08-06 12:26:26-- https://cloud-images.ubuntu.com/bionic/current/bionic-server-cloudimg-amd64.img
Resolving cloud-images.ubuntu.com (cloud-images.ubuntu.com).... 91.189.88.89, 2001:67c:1560:8001::8001
Connecting to cloud-images.ubuntu.com (cloud-images.ubuntu.com)[91.189.88.89]:443... connected.
HTTP request sent, waiting for response... 200 OK
Length: 343474176 (328M) [application/octet-stream] [application/octet-stream] [application/octet-stream]...
Saving to: "bionic-server-cloudimg-amd64.img"

bionic-server-cloudimg-amd64.img. 0%[ ] 2.21M 472KB/s eta 14m 6s

Wait until the image is 100% downloaded.

The Ubuntu cloud image comes with 2 GBytes of space by default, you can expand the size with the following command before using it in the virtual machine: 

qemu-img resize bionic-server-cloudimg-amd64.img +8G

This increases the image by 8 Gbytes, so you are left with a 10 GByte Ubuntu cloud image.

Step 3: Installing the libguestfs package

Next, you have to install the packages that provide the virt-customize tool to configure the Ubuntu image you downloaded.

We can install these packages with the apt' tool from the shell.

For Ubuntu 18.04: 

sudo apt install libguestfs

For Ubuntu 20.04: 

sudo apt install libguestfs-tools

On the practice classroom computers these packages will already be pre-installed, so you can skip this step.

Step 3: Configuring the Ubuntu image with virt-customize

The virt-customize command allows you to set the password of the administrator user of the image we have downloaded. 

virt-customize -a bionic-server-cloudimg-amd64.img --root-password password:coolpass

The above example shows how to configure the downloaded image to have the user root, and in this case, the password is coolpass.


Translated with www.DeepL.com/Translator (free version)For the realization of this practice you will need an Ubuntu Cloud image that we will download from https://cloud-images.ubuntu.com/ and we will need a host system with Ubuntu 18.04.

In this practice we will use the image downloaded from the Ubuntu Cloud website and we will use the cloud-init tool to configure it.

Next, we will use the Ubuntu image already configured to be imported to the virtualization software libvirt'.

= Step 1: Downloading the Ubuntu Cloud image

We enter https://cloud-images.ubuntu.com/ and download the Ubuntu 18.04 LTS (Long Time Support) image.

You can download it directly with the command wget: 

wget https://cloud-images.ubuntu.com/bionic/current/bionic-server-cloudimg-amd64.img

if it started downloading you will see output similar to this: 

-2019-08-06 12:26:26-- https://cloud-images.ubuntu.com/bionic/current/bionic-server-cloudimg-amd64.img
Resolving cloud-images.ubuntu.com (cloud-images.ubuntu.com).... 91.189.88.89, 2001:67c:1560:8001::8001
Connecting to cloud-images.ubuntu.com (cloud-images.ubuntu.com)[91.189.88.89]:443... connected.
HTTP request sent, waiting for response... 200 OK
Length: 343474176 (328M) [application/octet-stream] [application/octet-stream] [application/octet-stream]...
Saving to: "bionic-server-cloudimg-amd64.img"

bionic-server-cloudimg-amd64.img. 0%[ ] 2.21M 472KB/s eta 14m 6s

Wait until the image is 100% downloaded.

The Ubuntu cloud image comes with 2 GBytes of space by default, you can expand the size with the following command before using it in the virtual machine: 

qemu-img resize bionic-server-cloudimg-amd64.img +8G

This increases the image by 8 Gbytes, so you are left with a 10 GByte Ubuntu cloud image.

Step 3: Installing the libguestfs package

Next, you have to install the packages that provide the virt-customize tool to configure the Ubuntu image you downloaded.

We can install these packages with the apt' tool from the shell.

For Ubuntu 18.04: 

sudo apt install libguestfs

For Ubuntu 20.04: 

sudo apt install libguestfs-tools

On the practice classroom computers these packages will already be pre-installed, so you can skip this step.

Step 3: Configuring the Ubuntu image with virt-customize

The virt-customize command allows you to set the password of the administrator user of the image we have downloaded. 

virt-customize -a bionic-server-cloudimg-amd64.img --root-password password:coolpass

The above example shows how to configure the downloaded image to have the user root, and in this case, the password is coolpass.

Obtenido de «https://1984.lsi.us.es/wiki-ssoo/index.php?title=Virtualization_with_libvirt&oldid=4849»