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###############################################################################
# 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
import os
import re
import time
from common import (
exec_cmd,
check_file_exists,
check_if_root,
delete,
log,
)
VOL_XML_TEMPLATE = '''<volume type='file'>
<name>{name}</name>
<capacity unit='{unit}'>{size!s}</capacity>
<target>
<format type='{format_type}'/>
</target>
</volume>'''
DEFAULT_POOL = 'jenkins'
def get_size_and_unit(s):
p = re.compile('^(\d+)\s*(\D+)')
m = p.match(s)
if m == None:
return None, None
size = m.groups()[0]
unit = m.groups()[1]
return size, unit
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)
with open(self.vm_template) as f:
self.vm_xml = etree.parse(f)
self.temp_vm_file = '%s/%s' % (self.temp_dir, self.vm_name)
self.update_vm_template_file()
def __del__(self):
delete(self.temp_dir)
def update_vm_template_file(self):
with open(self.temp_vm_file, "wc") as f:
self.vm_xml.write(f, pretty_print=True, xml_declaration=True)
def del_vm_nics(self):
interfaces = self.vm_xml.xpath('/domain/devices/interface')
for interface in interfaces:
interface.getparent().remove(interface)
def add_vm_nic(self, bridge):
interface = etree.Element('interface')
interface.set('type', 'bridge')
source = etree.SubElement(interface, 'source')
source.set('bridge', bridge)
model = etree.SubElement(interface, 'model')
model.set('type', 'virtio')
devices = self.vm_xml.xpath('/domain/devices')
if devices:
device = devices[0]
device.append(interface)
else:
err('No devices!')
def create_volume(self, pool, name, su, img_type='qcow2'):
log('Creating image using Libvirt volumes in pool %s, name: %s' %
(pool, name))
size, unit = get_size_and_unit(su)
if size == None:
err('Could not determine size and unit of %s' % s)
vol_xml = VOL_XML_TEMPLATE.format(name=name, unit=unit, size=size,
format_type=img_type)
fname = os.path.join(self.temp_dir, '%s_vol.xml' % name)
with file(fname, 'w') as f:
f.write(vol_xml)
exec_cmd('virsh vol-create --pool %s %s' % (pool, fname))
vol_path = exec_cmd('virsh vol-path --pool %s %s' % (pool, name))
delete(fname)
return vol_path
def create_image(self, disk_path, disk_size):
if os.environ.get('LIBVIRT_DEFAULT_URI') == None:
exec_cmd('qemu-img create -f qcow2 %s %s' % (disk_path, disk_size))
else:
pool = DEFAULT_POOL # FIXME
name = os.path.basename(disk_path)
disk_path = self.create_volume(pool, name, disk_size)
return disk_path
def create_vm(self):
stamp = time.strftime("%Y%m%d%H%M%S")
disk_path = '%s/%s-%s.raw' % (self.storage_dir, self.vm_name, stamp)
disk_sizes = self.dha.get_disks()
disk_size = disk_sizes['fuel']
disk_path = self.create_image(disk_path, disk_size)
self.del_vm_nics()
for bridge in self.pxe_bridge:
self.add_vm_nic(bridge)
self.update_vm_template_file()
vm_definition_overwrite = self.dha.get_vm_definition('fuel')
self.define_vm(self.vm_name, self.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)
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