fuel/deploy/environments/virtual_fuel.py

   1 from lxml import etree
   2
   3 import common
   4 from execution_environment import ExecutionEnvironment
   5
   6 exec_cmd = common.exec_cmd
   7 log = common.log
   8 check_file_exists = common.check_file_exists
   9 check_if_root = common.check_if_root
  10
  11 class VirtualFuel(ExecutionEnvironment):
  12
  13     def __init__(self, storage_dir, pxe_bridge, dha_file, root_dir):
  14         super(VirtualFuel, self).__init__(storage_dir, dha_file, root_dir)
  15         self.pxe_bridge = pxe_bridge
  16
  17     def set_vm_nic(self, temp_vm_file):
  18         with open(temp_vm_file) as f:
  19             vm_xml = etree.parse(f)
  20         interfaces = vm_xml.xpath('/domain/devices/interface')
  21         for interface in interfaces:
  22             interface.getparent().remove(interface)
  23         interface = etree.Element('interface')
  24         interface.set('type', 'bridge')
  25         source = etree.SubElement(interface, 'source')
  26         source.set('bridge', self.pxe_bridge)
  27         model = etree.SubElement(interface, 'model')
  28         model.set('type', 'virtio')
  29         devices = vm_xml.xpath('/domain/devices')
  30         if devices:
  31             device = devices[0]
  32             device.append(interface)
  33         with open(temp_vm_file, 'w') as f:
  34             vm_xml.write(f, pretty_print=True, xml_declaration=True)
  35
  36     def create_vm(self):
  37         temp_dir = exec_cmd('mktemp -d')
  38         vm_name = self.dha.get_node_property(self.fuel_node_id, 'libvirtName')
  39         vm_template = '%s/%s' % (self.root_dir,
  40                                  self.dha.get_node_property(
  41                                      self.fuel_node_id, 'libvirtTemplate'))
  42         check_file_exists(vm_template)
  43         disk_path = '%s/%s.raw' % (self.storage_dir, vm_name)
  44         disk_sizes = self.dha.get_disks()
  45         disk_size = disk_sizes['fuel']
  46         exec_cmd('fallocate -l %s %s' % (disk_size, disk_path))
  47         temp_vm_file = '%s/%s' % (temp_dir, vm_name)
  48         exec_cmd('cp %s %s' % (vm_template, temp_vm_file))
  49         self.set_vm_nic(temp_vm_file)
  50         self.define_vm(vm_name, temp_vm_file, disk_path)
  51         exec_cmd('rm -fr %s' % temp_dir)
  52
  53     def setup_environment(self):
  54         check_if_root()
  55         self.cleanup_environment()
  56         self.create_vm()
  57
  58     def cleanup_environment(self):
  59         self.delete_vm(self.fuel_node_id)