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         self.vm_template = '%s/%s' % (self.root_dir,
  32                                       self.dha.get_node_property(
  33                                           self.fuel_node_id, 'libvirtTemplate'))
  34         check_file_exists(self.vm_template)
  35
  36     def __del__(self):
  37         delete(self.temp_dir)
  38
  39     def set_vm_nic(self, temp_vm_file):
  40         with open(temp_vm_file) as f:
  41             vm_xml = etree.parse(f)
  42         interfaces = vm_xml.xpath('/domain/devices/interface')
  43         for interface in interfaces:
  44             interface.getparent().remove(interface)
  45         interface = etree.Element('interface')
  46         interface.set('type', 'bridge')
  47         source = etree.SubElement(interface, 'source')
  48         source.set('bridge', self.pxe_bridge)
  49         model = etree.SubElement(interface, 'model')
  50         model.set('type', 'virtio')
  51         devices = vm_xml.xpath('/domain/devices')
  52         if devices:
  53             device = devices[0]
  54             device.append(interface)
  55         with open(temp_vm_file, 'w') as f:
  56             vm_xml.write(f, pretty_print=True, xml_declaration=True)
  57
  58     def create_image(self, disk_path, disk_size):
  59         exec_cmd('qemu-img create -f qcow2 %s %s' % (disk_path, disk_size))
  60
  61     def create_vm(self):
  62         disk_path = '%s/%s.raw' % (self.storage_dir, self.vm_name)
  63         disk_sizes = self.dha.get_disks()
  64         disk_size = disk_sizes['fuel']
  65         self.create_image(disk_path, disk_size)
  66
  67         temp_vm_file = '%s/%s' % (self.temp_dir, self.vm_name)
  68         exec_cmd('cp %s %s' % (self.vm_template, temp_vm_file))
  69         self.set_vm_nic(temp_vm_file)
  70         vm_definition_overwrite = self.dha.get_vm_definition('fuel')
  71         self.define_vm(self.vm_name, temp_vm_file, disk_path,
  72                        vm_definition_overwrite)
  73
  74     def setup_environment(self):
  75         check_if_root()
  76         self.cleanup_environment()
  77         self.create_vm()
  78
  79     def cleanup_environment(self):
  80         self.delete_vm(self.fuel_node_id)