Create VM

First, create a directory for vm-01:

mkdir -p /data/vm-01

sudo setfacl -m u:libvirt-qemu:rx /data

Next, create a storage pool for vm-01:

virsh pool-create-as --name vm-01 --type dir --target /data/vm-01 --build

You can also create the storage pool from an XML file. But first, check your user ID and group ID:

id

Your output will be something like this:

uid=1000(userx) gid=1000(userx) groups=1000(userx)

Now, you can create the XML file:

cat <<EOF | tee vm-pool.xml
<pool type='dir'>
  <name>vm-01</name>
  <source>
  </source>
  <target>
          <path>/data/vm-01</path>
    <permissions>
      <mode>0711</mode>
      <owner>1000</owner>
      <group>1000</group>
    </permissions>
  </target>
</pool>
EOF

Define the pool and start it:

virsh pool-define vm-pool.xml 
virsh pool-list --all
virsh pool-start vm-01
virsh pool-autostart vm-01

Next, copy the image to /data/vm-01:

curl -o /data/vm-01/ubuntu22_04.qcow2 https://cloud-images.ubuntu.com/jammy/current/jammy-server-cloudimg-amd64.img

Resize the disk to 30GB:

qemu-img resize /data/vm-01/ubuntu22_04.qcow2 30G

You can get info about the image:

qemu-img info /data/vm-01/ubuntu22_04.qcow2

Create a cloud-init configuration to set the password and hostname:

VM_NAME="vm-01"
USERNAME="Username"
PASSWORD="Your_Password"

echo "#cloud-config
system_info:
  default_user:
    name: $USERNAME
    home: /home/$USERNAME

lock_passwd: false
password: $PASSWORD
chpasswd: { expire: False }
shell: /bin/bash
hostname: $VM_NAME

ssh_pwauth: True
" | tee /data/vm-01/cloud-init.cfg

Create network settings:

echo "
network:
  ethernets:
    ens1:
    addresses:
    - 192.168.0.100/24
    gateway4: 192.168.0.1
    nameservers:
        addresses:
        - 1.1.1.1
        search:
        - cloudresource.io
  version: 2
" | tee /data/vm-01/network.yaml

Create a cloud-init.iso:

cloud-localds -v --network-config=/data/vm-01/network.yaml /data/vm-01/cloud-init.iso /data/vm-01/cloud-init.cfg

Now, deploy the VM image and set the VNC port to 5901. Each VM must have a unique VNC port, or set it to auto:

virt-install --import --name vm-01 \
--memory 4096 --vcpus 4 --cpu host-passthrough \
--disk /data/vm-01/ubuntu22_04.qcow2,format=qcow2,bus=virtio \
--disk /data/vm-01/cloud-init.iso,device=cdrom \
--network bridge=br0,model=virtio \
--os-variant=ubuntu22.04 \
--graphics vnc,listen=0.0.0.0,port=5901,passwd='********' \
--noautoconsole \
--noreboot

Optionally, you can modify the VM settings:

virsh edit vm-01

Start the VM:

virsh start vm-01

List all VMs:

virsh list --all

Eject the CDROM media:

virsh change-media vm-01 --path $(readlink -f /data/vm-01/cloud-init.iso --eject --force

You can log in via the console (vns) or SSH and install the Qemu guest agent in vm-01:

apt -y install qemu-guest-agent
systemctl enable qemu-guest-agent

reboot

After the reboot, check the agent status:

virsh qemu-agent-command vm-01 '{"execute":"guest-info"}' --pretty

If the guest agent is stopped or removed, you will see the following error:

error: Guest agent is not responding: QEMU guest agent is not connected

You can also create an extra disk (vdb) for VM vm-01:

virsh pool-list

Your output will be something like this:

 Name            State    Autostart
-------------------------------------
 vm-01           active   yes

Create a volume inside the pool vm-01, using qcow2 format and a size of 320GB:

virsh vol-create-as vm-01 vdb.qcow2 320G --format qcow2

Attach the volume to VM vm-01:

virsh attach-disk vm-01 /data/vm-01/vdb.qcow2 vdb --persistent --subdriver=qcow2