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from lxml import etree
import common
from execution_environment import ExecutionEnvironment
exec_cmd = common.exec_cmd
log = common.log
check_file_exists = common.check_file_exists
check_if_root = common.check_if_root
class VirtualFuel(ExecutionEnvironment):
def __init__(self, storage_dir, pxe_bridge, dha_file, root_dir):
super(VirtualFuel, self).__init__(storage_dir, dha_file, root_dir)
self.pxe_bridge = pxe_bridge
def set_vm_nic(self, temp_vm_file):
with open(temp_vm_file) as f:
vm_xml = etree.parse(f)
interfaces = vm_xml.xpath('/domain/devices/interface')
for interface in interfaces:
interface.getparent().remove(interface)
interface = etree.Element('interface')
interface.set('type', 'bridge')
source = etree.SubElement(interface, 'source')
source.set('bridge', self.pxe_bridge)
model = etree.SubElement(interface, 'model')
model.set('type', 'virtio')
devices = vm_xml.xpath('/domain/devices')
if devices:
device = devices[0]
device.append(interface)
with open(temp_vm_file, 'w') as f:
vm_xml.write(f, pretty_print=True, xml_declaration=True)
def create_vm(self):
temp_dir = exec_cmd('mktemp -d')
vm_name = self.dha.get_node_property(self.fuel_node_id, 'libvirtName')
vm_template = '%s/%s' % (self.root_dir,
self.dha.get_node_property(
self.fuel_node_id, 'libvirtTemplate'))
check_file_exists(vm_template)
disk_path = '%s/%s.raw' % (self.storage_dir, vm_name)
disk_sizes = self.dha.get_disks()
disk_size = disk_sizes['fuel']
exec_cmd('fallocate -l %s %s' % (disk_size, disk_path))
temp_vm_file = '%s/%s' % (temp_dir, vm_name)
exec_cmd('cp %s %s' % (vm_template, temp_vm_file))
self.set_vm_nic(temp_vm_file)
self.define_vm(vm_name, temp_vm_file, disk_path)
exec_cmd('rm -fr %s' % temp_dir)
def setup_environment(self):
check_if_root()
self.cleanup_environment()
self.create_vm()
def cleanup_environment(self):
self.delete_vm(self.fuel_node_id)
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