OpenStack Study: networkutilsv2.py

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# Copyright 2013 Cloudbase Solutions Srl

# All Rights Reserved.

#

# Licensed under the Apache License, Version 2.0 (the "License"); you may

# not use this file except in compliance with the License. You may obtain

# a copy of the License at

#

# http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT

# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the

# License for the specific language governing permissions and limitations

# under the License.

"""

Utility class for network related operations.

Based on the "root/virtualization/v2" namespace available starting with

Hyper-V Server / Windows Server 2012.

"""

import sys

if sys.platform == 'win32':

import wmi

from nova.openstack.common.gettextutils import _

from nova.virt.hyperv import networkutils

from nova.virt.hyperv import vmutils

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class NetworkUtilsV2(networkutils.NetworkUtils):

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    def __init__(self):

        if sys.platform == 'win32':

            self._conn = wmi.WMI(moniker='//./root/virtualization/v2')

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    def get_external_vswitch(self, vswitch_name):

        if vswitch_name:

            vswitches = self._conn.Msvm_VirtualEthernetSwitch(

                ElementName=vswitch_name)

            if not len(vswitches):

                raise vmutils.HyperVException(_('vswitch "%s" not found')

                                              % vswitch_name)

        else:

            # Find the vswitch that is connected to the first physical nic.

            ext_port = self._conn.Msvm_ExternalEthernetPort(IsBound='TRUE')[0]

            lep = ext_port.associators(wmi_result_class='Msvm_LANEndpoint')[0]

            lep1 = lep.associators(wmi_result_class='Msvm_LANEndpoint')[0]

            esw = lep1.associators(

                wmi_result_class='Msvm_EthernetSwitchPort')[0]

            vswitches = esw.associators(

                wmi_result_class='Msvm_VirtualEthernetSwitch')

            if not len(vswitches):

                raise vmutils.HyperVException(_('No external vswitch found'))

        return vswitches[0].path_()

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    def create_vswitch_port(self, vswitch_path, port_name):

        raise NotImplementedError()

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    def vswitch_port_needed(self):

        return False