ff76f3774e
This branch adds a new ViF driver to the Nova Hyper-V compute driver. It's responsible for creating the OVS port and the related association with the Hyper-V virtual switch port. Aside from the openvswitch binaries it has no other dependencies. Flow rules are added by an external agent such as OpenDaylight or by a Neutron OVS agent. Change-Id: I4cee52f65968fa503f2c8a2c9a206489719fb15a Implements: blueprint hyper-v-ovs-vif
71 lines
2.4 KiB
Python
71 lines
2.4 KiB
Python
# Copyright 2014 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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"""
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Implements necessary OVS helper functions. These functions are similar
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to the linux_net ones but have linux specific options, such as run_as_root
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and delete_net_dev, removed.
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This also allows us the flexibility to adapt to any future platform
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specific differences.
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"""
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import os
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from nova import exception
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from nova import utils
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from oslo_config import cfg
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from oslo_log import log as logging
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from hyperv.i18n import _LE
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LOG = logging.getLogger(__name__)
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net_cfg = [
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cfg.IntOpt('ovs_vsctl_timeout',
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default=120,
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help='Amount of time, in seconds, that ovs_vsctl should wait '
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'for a response from the database. 0 is to wait forever.'),
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]
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CONF = cfg.CONF
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CONF.register_opts(net_cfg)
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def _ovs_vsctl(args):
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full_args = ['ovs-vsctl', '--timeout=%s' % CONF.ovs_vsctl_timeout] + args
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try:
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return utils.execute(*full_args)
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except Exception as e:
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LOG.error(_LE("Unable to execute %(cmd)s. Exception: %(exception)s"),
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{'cmd': full_args, 'exception': e})
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raise exception.AgentError(method=full_args)
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def create_ovs_vif_port(bridge, dev, iface_id, mac, instance_id):
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_ovs_vsctl(['--', '--if-exists', 'del-port', dev, '--',
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'add-port', bridge, dev,
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'--', 'set', 'Interface', dev,
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'external-ids:iface-id=%s' % iface_id,
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'external-ids:iface-status=active',
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'external-ids:attached-mac=%s' % mac,
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'external-ids:vm-uuid=%s' % instance_id])
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def delete_ovs_vif_port(bridge, dev):
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_ovs_vsctl(['--', '--if-exists', 'del-port', bridge, dev])
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def check_bridge_has_dev(bridge, dev, run_as_root=True):
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ports = _ovs_vsctl(['--', 'list-ports', bridge])[0]
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return dev in ports.split(os.linesep)
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