fuel/deploy/environments/virtual_fuel.py

   1 ###############################################################################
   2 # Copyright (c) 2015 Ericsson AB and others.
   3 # szilard.cserey@ericsson.com
   4 # All rights reserved. This program and the accompanying materials
   5 # are made available under the terms of the Apache License, Version 2.0
   6 # which accompanies this distribution, and is available at
   7 # http://www.apache.org/licenses/LICENSE-2.0
   8 ###############################################################################
   9
  10
  11 from lxml import etree
  12
  13 import common
  14 from execution_environment import ExecutionEnvironment
  15
  16 exec_cmd = common.exec_cmd
  17 log = common.log
  18 check_file_exists = common.check_file_exists
  19 check_if_root = common.check_if_root
  20
  21
  22 class VirtualFuel(ExecutionEnvironment):
  23
  24     def __init__(self, storage_dir, pxe_bridge, dha_file, root_dir):
  25         super(VirtualFuel, self).__init__(storage_dir, dha_file, root_dir)
  26         self.pxe_bridge = pxe_bridge
  27
  28     def set_vm_nic(self, temp_vm_file):
  29         with open(temp_vm_file) as f:
  30             vm_xml = etree.parse(f)
  31         interfaces = vm_xml.xpath('/domain/devices/interface')
  32         for interface in interfaces:
  33             interface.getparent().remove(interface)
  34         interface = etree.Element('interface')
  35         interface.set('type', 'bridge')
  36         source = etree.SubElement(interface, 'source')
  37         source.set('bridge', self.pxe_bridge)
  38         model = etree.SubElement(interface, 'model')
  39         model.set('type', 'virtio')
  40         devices = vm_xml.xpath('/domain/devices')
  41         if devices:
  42             device = devices[0]
  43             device.append(interface)
  44         with open(temp_vm_file, 'w') as f:
  45             vm_xml.write(f, pretty_print=True, xml_declaration=True)
  46
  47     def create_vm(self):
  48         temp_dir = exec_cmd('mktemp -d')
  49         vm_name = self.dha.get_node_property(self.fuel_node_id, 'libvirtName')
  50         vm_template = '%s/%s' % (self.root_dir,
  51                                  self.dha.get_node_property(
  52                                      self.fuel_node_id, 'libvirtTemplate'))
  53         check_file_exists(vm_template)
  54         disk_path = '%s/%s.raw' % (self.storage_dir, vm_name)
  55         disk_sizes = self.dha.get_disks()
  56         disk_size = disk_sizes['fuel']
  57         exec_cmd('fallocate -l %s %s' % (disk_size, disk_path))
  58         temp_vm_file = '%s/%s' % (temp_dir, vm_name)
  59         exec_cmd('cp %s %s' % (vm_template, temp_vm_file))
  60         self.set_vm_nic(temp_vm_file)
  61         self.define_vm(vm_name, temp_vm_file, disk_path)
  62         exec_cmd('rm -fr %s' % temp_dir)
  63
  64     def setup_environment(self):
  65         check_if_root()
  66         self.cleanup_environment()
  67         self.create_vm()
  68
  69     def cleanup_environment(self):
  70         self.delete_vm(self.fuel_node_id)