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##############################################################################
# Copyright (c) 2018 Nokia Corporation and others.
#
# 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
##############################################################################
import os
import shutil
def set_cpu_allocation_ratio():
nova_file_bak = None
for nova_file in ["/var/lib/config-data/puppet-generated/nova_libvirt/etc/nova/nova.conf", # noqa
"/var/lib/config-data/puppet-generated/nova/etc/nova/nova.conf", # noqa
"/etc/nova/nova.conf"]:
if os.path.isfile(nova_file):
nova_file_bak = nova_file.replace(".conf", ".bak")
break
if nova_file_bak is None:
raise Exception("Could not find nova.conf")
# TODO (tojuvone): Unfortunately ConfigParser did not produce working conf
fcheck = open(nova_file)
found_list = ([ca for ca in fcheck.readlines() if "cpu_allocation_ratio"
in ca])
fcheck.close()
if found_list and len(found_list):
change = False
found = False
for car in found_list:
if car.startswith('#'):
continue
if car.startswith('cpu_allocation_ratio'):
found = True
if "1.0" not in car.split('=')[1]:
change = True
if not found or change:
# need to add or change
shutil.copyfile(nova_file, nova_file_bak)
fin = open(nova_file_bak)
fout = open(nova_file, "wt")
for line in fin:
if change and line.startswith("cpu_allocation_ratio"):
line = "cpu_allocation_ratio=1.0"
if not found and line.startswith("[DEFAULT]"):
line += "cpu_allocation_ratio=1.0\n"
fout.write(line)
fin.close()
fout.close()
set_cpu_allocation_ratio()
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