#!/bin/bash

set -e

name=$1
size=20G

TMPDIR="$(mktemp -d "/tmp/${0##*/}.XXXXXX")"
trap "rm -rf '${TMPDIR}'" EXIT TERM
cd "$TMPDIR"

if [[ ! -f /srv/http/vms/network/$name ]]; then
	echo "Missing vm network definition /srv/http/vms/network/$name" >&2
	exit 1
fi

cat <<EOF >vm.xml
<domain type='kvm'>
  <name>$name</name>
  <memory unit='KiB'>2097152</memory>
  <currentMemory unit='KiB'>2097152</currentMemory>
  <vcpu placement='static'>4</vcpu>
  <os>
    <type arch='x86_64' machine='pc-i440fx-1.7'>hvm</type>
    <boot dev='hd'/>
    <boot dev='network'/>
    <bootmenu enable='no'/>
  </os>
  <features>
    <acpi/>
    <apic/>
    <pae/>
  </features>
  <clock offset='utc'/>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>restart</on_crash>
  <devices>
    <emulator>/usr/sbin/qemu-system-x86_64</emulator>
    <disk type='file' device='disk'>
      <driver name='qemu' type='qcow2'/>
      <source file='/var/lib/libvirt/images/${name}.img'/>
      <target dev='vda' bus='virtio'/>
    </disk>
    <controller type='usb' index='0'>
    </controller>
    <controller type='pci' index='0' model='pci-root'/>
    <controller type='ide' index='0'>
    </controller>
    <controller type='scsi' index='0'>
    </controller>
    <controller type='scsi' index='1' model='virtio-scsi'>
    </controller>
    <interface type='network'>
      <source network='mynet'/>
      <model type='virtio'/>
    </interface>
    <serial type='pty'>
      <target port='0'/>
    </serial>
    <console type='pty'>
      <target type='serial' port='0'/>
    </console>
    <input type='mouse' bus='ps2'/>
    <graphics type='vnc' port='-1' autoport='yes'/>
    <sound model='ich6'>
    </sound>
    <video>
      <model type='cirrus' vram='9216' heads='1'/>
    </video>
    <memballoon model='virtio'>
    </memballoon>
  </devices>
</domain>
EOF

virsh vol-create-as default ${name}.img $size --format qcow2
virsh define vm.xml

vmmac=$(virsh domiflist $name | grep -oE "[0-9a-f]{2}:[0-9a-f]{2}:[0-9a-f]{2}:[0-9a-f]{2}:[0-9a-f]{2}:[0-9a-f]{2}")
echo "$name" > /srv/http/vms/hostnames/"$vmmac"

virsh start $name