summaryrefslogtreecommitdiffstats
path: root/deploy/environments/virtual_fuel.py
blob: ac5fc53565592451cabb59aa1d11b9b7674cf48d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
###############################################################################
# Copyright (c) 2015 Ericsson AB and others.
# szilard.cserey@ericsson.com
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Apache License, Version 2.0
# which accompanies this distribution, and is available at
# http://www.apache.org/licenses/LICENSE-2.0
###############################################################################


from lxml import etree
from execution_environment import ExecutionEnvironment
import tempfile

from common import (
    exec_cmd,
    check_file_exists,
    check_if_root,
    delete,
)


class VirtualFuel(ExecutionEnvironment):

    def __init__(self, storage_dir, pxe_bridge, dha_file, root_dir):
        super(VirtualFuel, self).__init__(storage_dir, dha_file, root_dir)
        self.pxe_bridge = pxe_bridge
        self.temp_dir = tempfile.mkdtemp()
        self.vm_name = self.dha.get_node_property(self.fuel_node_id,
                                                  'libvirtName')
        self.vm_template = '%s/%s' % (self.root_dir,
                                      self.dha.get_node_property(
                                          self.fuel_node_id, 'libvirtTemplate'))
        check_file_exists(self.vm_template)

    def __del__(self):
        delete(self.temp_dir)

    def set_vm_nic(self, temp_vm_file):
        with open(temp_vm_file) as f:
            vm_xml = etree.parse(f)
        interfaces = vm_xml.xpath('/domain/devices/interface')
        for interface in interfaces:
            interface.getparent().remove(interface)
        interface = etree.Element('interface')
        interface.set('type', 'bridge')
        source = etree.SubElement(interface, 'source')
        source.set('bridge', self.pxe_bridge)
        model = etree.SubElement(interface, 'model')
        model.set('type', 'virtio')
        devices = vm_xml.xpath('/domain/devices')
        if devices:
            device = devices[0]
            device.append(interface)
        with open(temp_vm_file, 'w') as f:
            vm_xml.write(f, pretty_print=True, xml_declaration=True)

    def create_image(self, disk_path, disk_size):
        exec_cmd('qemu-img create -f qcow2 %s %s' % (disk_path, disk_size))

    def create_vm(self):
        disk_path = '%s/%s.raw' % (self.storage_dir, self.vm_name)
        disk_sizes = self.dha.get_disks()
        disk_size = disk_sizes['fuel']
        self.create_image(disk_path, disk_size)

        temp_vm_file = '%s/%s' % (self.temp_dir, self.vm_name)
        exec_cmd('cp %s %s' % (self.vm_template, temp_vm_file))
        self.set_vm_nic(temp_vm_file)
        vm_definition_overwrite = self.dha.get_vm_definition('fuel')
        self.define_vm(self.vm_name, temp_vm_file, disk_path,
                       vm_definition_overwrite)

    def setup_environment(self):
        check_if_root()
        self.cleanup_environment()
        self.create_vm()

    def cleanup_environment(self):
        self.delete_vm(self.fuel_node_id)