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 from execution_environment import ExecutionEnvironment
  13 import tempfile
  14
  15 from common import (
  16     exec_cmd,
  17     check_file_exists,
  18     check_if_root,
  19     delete,
  20 )
  21
  22
  23 class VirtualFuel(ExecutionEnvironment):
  24
  25     def __init__(self, storage_dir, pxe_bridge, dha_file, root_dir):
  26         super(VirtualFuel, self).__init__(storage_dir, dha_file, root_dir)
  27         self.pxe_bridge = pxe_bridge
  28         self.temp_dir = tempfile.mkdtemp()
  29         self.vm_name = self.dha.get_node_property(self.fuel_node_id,
  30                                                   'libvirtName')
  31
  32     def __del__(self):
  33         delete(self.temp_dir)
  34
  35     def set_vm_nic(self, temp_vm_file):
  36         with open(temp_vm_file) as f:
  37             vm_xml = etree.parse(f)
  38         interfaces = vm_xml.xpath('/domain/devices/interface')
  39         for interface in interfaces:
  40             interface.getparent().remove(interface)
  41         interface = etree.Element('interface')
  42         interface.set('type', 'bridge')
  43         source = etree.SubElement(interface, 'source')
  44         source.set('bridge', self.pxe_bridge)
  45         model = etree.SubElement(interface, 'model')
  46         model.set('type', 'virtio')
  47         devices = vm_xml.xpath('/domain/devices')
  48         if devices:
  49             device = devices[0]
  50             device.append(interface)
  51         with open(temp_vm_file, 'w') as f:
  52             vm_xml.write(f, pretty_print=True, xml_declaration=True)
  53
  54     def create_vm(self):
  55         vm_template = '%s/%s' % (self.root_dir,
  56                                  self.dha.get_node_property(
  57                                      self.fuel_node_id, 'libvirtTemplate'))
  58         check_file_exists(vm_template)
  59         disk_path = '%s/%s.raw' % (self.storage_dir, self.vm_name)
  60         disk_sizes = self.dha.get_disks()
  61         disk_size = disk_sizes['fuel']
  62         exec_cmd('qemu-img create -f qcow2 %s %s' % (disk_path, disk_size))
  63         temp_vm_file = '%s/%s' % (self.temp_dir, self.vm_name)
  64         exec_cmd('cp %s %s' % (vm_template, temp_vm_file))
  65         self.set_vm_nic(temp_vm_file)
  66         vm_definition_overwrite = self.dha.get_vm_definition('fuel')
  67         self.define_vm(self.vm_name, temp_vm_file, disk_path,
  68                        vm_definition_overwrite)
  69
  70     def setup_environment(self):
  71         check_if_root()
  72         self.cleanup_environment()
  73         self.create_vm()
  74
  75     def cleanup_environment(self):
  76         self.delete_vm(self.fuel_node_id)