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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 dha_adapters.libvirt_adapter import LibvirtAdapter
from common import (
exec_cmd,
log,
delete,
)
class ExecutionEnvironment(object):
def __init__(self, storage_dir, dha_file, root_dir):
self.storage_dir = storage_dir
self.dha = LibvirtAdapter(dha_file)
self.root_dir = root_dir
self.parser = etree.XMLParser(remove_blank_text=True)
self.fuel_node_id = self.dha.get_fuel_node_id()
def delete_vm(self, node_id):
vm_name = self.dha.get_node_property(node_id, 'libvirtName')
r, c = exec_cmd('virsh dumpxml %s' % vm_name, False)
if c:
return
self.undefine_vm_delete_disk(r, vm_name)
def undefine_vm_delete_disk(self, printout, vm_name):
disk_files = []
xml_dump = etree.fromstring(printout, self.parser)
disks = xml_dump.xpath('/domain/devices/disk')
for disk in disks:
sources = disk.xpath('source')
for source in sources:
source_file = source.get('file')
if source_file:
disk_files.append(source_file)
log('Deleting VM %s with disks %s' % (vm_name, disk_files))
exec_cmd('virsh destroy %s' % vm_name, False)
exec_cmd('virsh undefine %s' % vm_name, False)
for file in disk_files:
delete(file)
def define_vm(self, vm_name, temp_vm_file, disk_path, number_cpus):
log('Creating VM %s with disks %s' % (vm_name, disk_path))
with open(temp_vm_file) as f:
vm_xml = etree.parse(f)
names = vm_xml.xpath('/domain/name')
for name in names:
name.text = vm_name
uuids = vm_xml.xpath('/domain/uuid')
for uuid in uuids:
uuid.getparent().remove(uuid)
if number_cpus:
vcpus = vm_xml.xpath('/domain/vcpu')
for vcpu in vcpus:
vcpu.text = str(number_cpus)
disks = vm_xml.xpath('/domain/devices/disk')
for disk in disks:
if (disk.get('type') == 'file' and
disk.get('device') == 'disk'):
sources = disk.xpath('source')
for source in sources:
disk.remove(source)
source = etree.Element('source')
source.set('file', disk_path)
disk.append(source)
with open(temp_vm_file, 'w') as f:
vm_xml.write(f, pretty_print=True, xml_declaration=True)
exec_cmd('virsh define %s' % temp_vm_file)
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