define virtual::kvm::kvmx::instance(
  $vg,
  $size,
  $ram,
  $shell,
  $iface,
  $ip,
  $gateway,
  $guest_domain      = 'example.org',
  $dns               = 'host',
  $netmask           = '255.255.255.0',
  $initial_user      = 'user',
  $udev              = false,
  $supervise         = '1',
  $ssh_custom_pubkey = '',
) {
  virtual::kvm::instance { $name:
    udev  => $udev,
    iface => $iface,
    shell => $shell ? {
      undef   => '/usr/local/bin/kvmx-restricted-shell',
      default => $shell,
    },
  }

  exec { "kvmx-lvcreate-${name}":
    command => "/sbin/lvcreate --name ${name} --size ${size} ${vg}",
    user    => root,
    creates => "/dev/${vg}/${name}",
    #onlyif  => "test ! -e /dev/${vg}/${name}"
    require => Virtual::Kvm::Instance["$name"], # due to udev rule
  }

  exec { "kvmx-init-${name}":
    command     => "/usr/local/bin/kvmx init",
    user        => $name,
    environment => [ "HOME=/home/${name}" ],
    cwd         => "/home/${name}/vms/${name}",
    creates     => "/home/${name}/vms/${name}/kvmxfile",
    require     => Virtual::Kvm::Instance["$name"],
  }

  virtual::kvm::kvmx::config { "${name}-user":
    vm    => $name,
    param => 'user',
    value => $initial_user,
  }

  virtual::kvm::kvmx::config { "${name}-memory":
    vm    => $name,
    param => 'memory',
    value => $ram,
  }

  virtual::kvm::kvmx::config { "${name}-size":
    vm    => $name,
    param => 'size',
    value => $size,
  }

  virtual::kvm::kvmx::config { "${name}-image":
    vm    => $name,
    param => 'image',
    value => "\$HOME/vms/${name}/box.img",
  }

  virtual::kvm::kvmx::config { "${name}-net":
    vm    => $name,
    param => 'net',
    value => "tap",
  }

  virtual::kvm::kvmx::config { "${name}-net_ip":
    vm    => $name,
    param => 'net_ip',
    value => "$ip",
  }

  virtual::kvm::kvmx::config { "${name}-net_mask":
    vm    => $name,
    param => 'net_mask',
    value => "$netmask",
  }

  virtual::kvm::kvmx::config { "${name}-net_gateway":
    vm    => $name,
    param => 'net_gateway',
    value => "$gateway",
  }

  virtual::kvm::kvmx::config { "${name}-net_dns":
    vm    => $name,
    param => 'net_dns',
    value => "$dns",
  }

  virtual::kvm::kvmx::config { "${name}-domain":
    vm    => $name,
    param => 'domain',
    value => "$guest_domain",
  }

  virtual::kvm::kvmx::config { "${name}-spice":
    vm    => $name,
    param => 'spice',
    value => "0",
  }

  virtual::kvm::kvmx::config { "${name}-run_spice_client":
    vm    => $name,
    param => 'run_spice_client',
    value => "0",
  }

  virtual::kvm::kvmx::config { "${name}-graphics":
    vm    => $name,
    param => 'graphics',
    value => "-nographic",
  }

  virtual::kvm::kvmx::config { "${name}-sound":
    vm    => $name,
    param => 'sound',
    value => "0",
  }

  virtual::kvm::kvmx::config_unset { "${name}-shared_folder":
    vm    => $name,
    param => 'shared_folder',
  }

  virtual::kvm::kvmx::config { "${name}-format":
    vm    => $name,
    param => 'format',
    value => "raw",
  }

  virtual::kvm::kvmx::config { "${name}-image_type":
    vm    => $name,
    param => 'image_type',
    value => "device",
  }

  virtual::kvm::kvmx::config { "${name}-ssh_support":
    vm    => $name,
    param => 'ssh_support',
    value => "n",
  }

  virtual::kvm::kvmx::config { "${name}-drive_interface":
    vm    => $name,
    param => 'drive_interface',
    value => "virtio,cache=none,index=0,format=raw",
  }

  virtual::kvm::kvmx::config { "${name}-supervise_manage":
    vm    => $name,
    param => 'supervise_manage',
    value => "${supervise}",
  }

  if $ssh_custom_pubkey == '' {
    virtual::kvm::kvmx::config_unset { "${name}-ssh_custom_pubkey":
      vm    => $name,
      param => 'ssh_custom_pubkey',
    }
  }
  else {
    virtual::kvm::kvmx::config { "${name}-ssh-custom_pubkey":
      vm    => $name,
      param => 'ssh_custom_pubkey',
      value => $ssh_custom_pubkey,
    }
  }
}