Virtualization of Debian Edu Bullseye with virt-manager and kvm.

virt-manager + KVM

sudo apt install virt-manager qemu-system

Modify default subnet for skolelinux network

sudo virsh net-edit default

 <forward mode='nat'/>
 <bridge name='virbr0' stp='on' delay='0'/>
 <mac address='52:54:00:1e:fa:7f'/>
 <ip address='' netmask=''>

Create an isolated network for LTSP

sudo nano edultsp.xml


 <bridge name='edubr0' stp='on' delay='0'/>
 <mac address='52:54:00:cf:58:07'/>
 <ip address='' netmask=''>

sudo virsh net-define edultsp.xml

The mac address is chosen randomly in hexadecimal for the last three pairs of numbers

sudo adduser <youruser> libvirt

Virt manager

Be sure that the default and edulstp networks in QEMU/KVM details are active and Autostart with On boot checked.

  1. choice of iso file (debian-edu-11.5.0-amd64-netinst.iso)
  2. operating system (debian 11)
  3. Memory (RAM = 8096) & numbers of CPU (CPU = 2)

  4. System storage = 40Gb (vol.qcow2)
  5. Machine name (debian-edu_server) net ('default' :NAT)

Installing the system

  1. Select language
  2. Select your location
  3. Configure your location
  4. Configure the network (try DHCP, but being disabled it cannot)
  5. Manually select for network configuration
  6. Server IP
  7. Gateway
  8. DNS
  9. Choose Debian Edu profile (selected one: Main Server+Workstation+LTSP)
  10. Really use the automatic partitioning tool? (Yes)
  11. Partecipate in the package usage survey? (No)
  12. Root password
  13. Full name for the first user
  14. Username for the first user
  15. Password for the first user (the password must be at least 5 characters long and is not the same as the username)
  16. Start installation
  17. Finish installation

Adding a second NIC to the server for LTSP

The debian-edu_server must be turned off and then edited by inserting a second virtual Nic. Example:

sudo virsh edit debian-edu_server

Scroll the file down to the <interface> and </interface> tags with <source network='default'/> and add the second virtual card with <source network='edultsp'/> and bus='0x07'

<interface type='network'>
    <mac address='52:54:00:10:92:64'/>
    <source network='default'/>
    <model type='virtio'/>
    <address type='pci' domain='0x0000' bus='0x01' slot='0x00' function='0x0'/>
<interface type='network'>
    <mac address='52:54:00:09:a3:14'/>
    <source network='edultsp'/>
    <model type='virtio'/>
    <address type='pci' domain='0x0000' bus='0x07' slot='0x00' function='0x0'/>

Creating a diskless_VM

  1. Running debian-edu_server
  2. Type of installation: PXE or manual
  3. Operating system to be installed: Debian 11
  4. Memory and CPU choice: Memory 2 Gb, Cpu 1
  5. DESELECT Enable storage for this virtual machine
  6. Name and network: name: diskless_VM, network: 'edultsp'
  7. Running diskless_VM