Create a kvm image using libvirt and uvtool. Image is configured with bridge networking.

vm-create.bash

#! /usr/bin/env bash

### Create VM
#
# Create a kvm image using libvirt and uvtool. Image is configured with
# bridge networking.
#

## Functions

usage() {
  echo "Usage: vm-create [-m <memory MB>] [-d <disk GB>] [-c <cpu>] [-r <release>] [-s] <name>"
  exit 1
}

## Arguments

memory="2048"
disk="20"
cpu="1"
release="bionic"
sync="false"

while getopts :m:d:c:r:s opt; do
  case $opt in
  m)
      memory=$OPTARG
      ;;
  d)
      disk=$OPTARG
      ;;
  c)
      cpu=$OPTARG
      ;;
  r)
      release=$OPTARG
      ;;
  s)
      sync="true"
      ;;
  *)
      usage
      ;;
  esac
done

shift $((OPTIND - 1))

if (( $# != 1 ))
then
  usage
fi

## Main

if [[ $sync = "true" ]]; then
  echo "Syncing $release cloud images..."
  uvt-simplestreams-libvirt sync release=$release arch=amd64
fi

echo -e "\n=== VM ==="
echo -e "name:\t$1"
echo -e "memory:\t$memory MB"
echo -e "disk:\t$disk GB"
echo -e "cpu:\t$cpu"

echo -e "\nCreating $1..."
uvt-kvm create --bridge br0 --memory $memory --disk $disk --cpu $cpu $1 release=$release
echo -e "Done."

echo -e "\nVirtual Machines:\n"
virsh -c qemu:///system list

echo -e "\nWaiting for vm to come online..."
sleep 15

echo -e "\nNetwork interface:\n"
interface=`virsh domiflist $1`
echo -e "$interface"

echo -e "\nRetrieving IP address..."
mac_address=`echo "$interface" | grep 'bridge' | awk '{print $5;}'`
ip=`sudo arp-scan --interface=br0 --localnet | grep $mac_address | awk '{print $1;}'`
echo -e "IP: $ip"

read -p "Add IP to hosts file? (Y/n) " add_ip_hosts
add_ip_hosts=${add_ip_hosts:-Y}

if [[ $add_ip_hosts = [Yy]* ]]; then
  echo "$ip $1" | sudo tee -a /etc/hosts
  echo 'Added to hosts file.'
fi