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