sudo virsh --connect qemu:///session net-define /dev/stdin << EOF
<network>
  <name>bridged-network</name>
  <forward mode='bridge'/>
  <bridge name='brbackend' />
</network>
EOF

AppArmor exception

ln -s /etc/apparmor.d/usr.sbin.libvirtd /etc/apparmor.d/disable/
apparmor_parser -R /etc/apparmor.d/usr.sbin.libvirtd

Creating VMs

Usage

usage: ./vm_create.sh options

Quickly create guest VMs using cloud image files and cloud-init.

OPTIONS:
   -h      Show this message
   -n      Host name (required)
   -b      bridge interface name (bridge network is used)
   -r      RAM in MB (defaults to 2048)
   -c      Number of VCPUs (defaults to 2)
   -s      Amount of storage to allocate in GB (defaults to 20)
   -v      Verbose

The only required parameter is the hostname, but you can also set RAM size (in MB), number of VCPUs or storage size (in GB), if these parameters are not set, default values will used:

RAM: 20248MB
VCPUs: 2
DISK: 20GB

Actually, you can select these base OS for Guests

Debian 12
Ubuntu 20.04
Ubuntu 22.04
FreeBSD 14.1

Examples

./vm_create.sh -ntestMachine

A VM will ve created with default values

./vm_create.sh -ntestMachine -r4098 -c4 -s100

A VM will be created with 4098 MB of RAM, 4 vCPUs and 100Gb of storage

FreeBSD VMs

FreeBSD with cloud-init are now supported!! Just wait a little time to have the VM fully initialized (check it with virt-manager or serial connection manually)

List VMs

./vm_list.sh 
 Id   Nombre       Estado
-------------------------------
 7    debianTest   ejecutando
 8    ubuntuTest   ejecutando

Connect to an VM

./vm_connect.sh debianTest

Get ip of VM

Use as parameter machine name

./vm_get_ip.sh ubuntuTest
192.168.122.234

Delete VMs

Use as parameter machine name

./vm_delete.sh ubuntuTest
Are you sure you want to remove the VM 'ubuntuTest' (y/N)? y
Domain 'ubuntuTest' destroyed

Domain 'ubuntuTest' has been undefined

VM 'ubuntuTest' removed successfully.

TODO

FreeBSD support is still in progress
Check if used commands are available ./vm_create.sh: línea 52: mkpasswd: orden no encontrada ./vm_create.sh: línea 259: virt-install: orden no encontrada ./vm_create.sh: línea 261: virsh: orden no encontrada qemu-img wget curl mkpass arp sudo apt install --no-install-recommends qemu-system libvirt-clients libvirt-daemon-system whois virtinst net-tools sudo chmod 750 /home/victor sudo usermod -a -G libvirt $(whoami) sudo usermod --append --groups earl libvirt-qemu
Refactoring variables, functions and scripts calls for legibility and maintenance
add script for create default files (network, variables etc)

README.md

kvm-cloudimage

Pre-requisites

Links

Preparing host

Create bridge network