kvm-cloudimage

Use cloud images on baremetal using libvirt/kvm

Pre-requisites

openssh
mkpass (whois)
arp

Preparing host

Create bridge network

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