5d2a06df39
Blueprint: hyper-v-wmi-v2 The Hyper-V APIs are mainly based on WMI. The original 2008 Hyper-V release introduced the "root\virtualization" namespace which got superseded in Hyper-V Server / Windows Server 2012 by the "root\virtualization\v2" namespace (referred as V2 in the sources). The original namespace has been dropped in the upcoming Hyper-V 2012 R2 (currently available in preview), which means that the Grizzly code will not be compatible with it as is. The Hyper-V driver is structured with a clear decoupling between OS interaction classes (so called *utils modules and classes) and the agent's logic. This allows us to provide an implementation of the V2 API without impacting the rest of the agent's code, based on a factory module added to instantiate the proper version of the *utils classes: the original "V1" ones for versions of the OS predating 2012 and the newer "V2" ones starting from Hyper-V 2012 (Windows kernel version 6.2). Change-Id: I380d8c65715242d8a5b94b5061ebe4f30e6c2090
67 lines
2.1 KiB
Python
67 lines
2.1 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2013 Cloudbase Solutions SRL
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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# @author: Claudiu Belu, Cloudbase Solutions Srl
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import sys
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from oslo.config import cfg
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from neutron.openstack.common import log as logging
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from neutron.plugins.hyperv.agent import utils
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from neutron.plugins.hyperv.agent import utilsv2
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# Check needed for unit testing on Unix
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if sys.platform == 'win32':
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import wmi
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hyper_opts = [
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cfg.BoolOpt('force_hyperv_utils_v1',
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default=False,
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help='Force V1 WMI utility classes'),
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]
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CONF = cfg.CONF
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CONF.register_opts(hyper_opts, 'hyperv')
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LOG = logging.getLogger(__name__)
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def _get_windows_version():
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return wmi.WMI(moniker='//./root/cimv2').Win32_OperatingSystem()[0].Version
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def _check_min_windows_version(major, minor, build=0):
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version_str = _get_windows_version()
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return map(int, version_str.split('.')) >= [major, minor, build]
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def _get_class(v1_class, v2_class, force_v1_flag):
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# V2 classes are supported starting from Hyper-V Server 2012 and
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# Windows Server 2012 (kernel version 6.2)
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if not force_v1_flag and _check_min_windows_version(6, 2):
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cls = v2_class
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else:
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cls = v1_class
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LOG.debug("Loading class: %(module_name)s.%(class_name)s",
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{'module_name': cls.__module__, 'class_name': cls.__name__})
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return cls
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def get_hypervutils():
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return _get_class(utils.HyperVUtils, utilsv2.HyperVUtilsV2,
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CONF.hyperv.force_hyperv_utils_v1)()
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