2778b9fe4f
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 The original 2008 Hyper-V release introduced the "root\virtualization" namespace which got superseded in Hyper-V Server / Windows Server 2012 by the "root\virtualization\v2" namespace (referred as V2 in the sources).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
349 lines
13 KiB
Python
349 lines
13 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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#Copyright 2013 Cloudbase Solutions SRL
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#Copyright 2013 Pedro Navarro Perez
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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: Pedro Navarro Perez
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# @author: Alessandro Pilotti, Cloudbase Solutions Srl
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import eventlet
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import platform
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import re
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import sys
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import time
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from oslo.config import cfg
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from neutron.agent import rpc as agent_rpc
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from neutron.common import config as logging_config
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from neutron.common import topics
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from neutron import context
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from neutron.openstack.common import log as logging
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from neutron.openstack.common.rpc import dispatcher
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from neutron.plugins.hyperv.agent import utils
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from neutron.plugins.hyperv.agent import utilsfactory
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from neutron.plugins.hyperv.common import constants
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LOG = logging.getLogger(__name__)
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agent_opts = [
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cfg.ListOpt(
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'physical_network_vswitch_mappings',
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default=[],
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help=_('List of <physical_network>:<vswitch> '
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'where the physical networks can be expressed with '
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'wildcards, e.g.: ."*:external"')),
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cfg.StrOpt(
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'local_network_vswitch',
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default='private',
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help=_('Private vswitch name used for local networks')),
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cfg.IntOpt('polling_interval', default=2,
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help=_("The number of seconds the agent will wait between "
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"polling for local device changes.")),
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]
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CONF = cfg.CONF
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CONF.register_opts(agent_opts, "AGENT")
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class HyperVNeutronAgent(object):
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# Set RPC API version to 1.0 by default.
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RPC_API_VERSION = '1.0'
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def __init__(self):
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self._utils = utilsfactory.get_hypervutils()
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self._polling_interval = CONF.AGENT.polling_interval
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self._load_physical_network_mappings()
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self._network_vswitch_map = {}
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self._setup_rpc()
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def _setup_rpc(self):
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self.agent_id = 'hyperv_%s' % platform.node()
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self.topic = topics.AGENT
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self.plugin_rpc = agent_rpc.PluginApi(topics.PLUGIN)
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# RPC network init
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self.context = context.get_admin_context_without_session()
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# Handle updates from service
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self.dispatcher = self._create_rpc_dispatcher()
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# Define the listening consumers for the agent
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consumers = [[topics.PORT, topics.UPDATE],
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[topics.NETWORK, topics.DELETE],
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[topics.PORT, topics.DELETE],
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[constants.TUNNEL, topics.UPDATE]]
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self.connection = agent_rpc.create_consumers(self.dispatcher,
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self.topic,
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consumers)
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def _load_physical_network_mappings(self):
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self._physical_network_mappings = {}
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for mapping in CONF.AGENT.physical_network_vswitch_mappings:
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parts = mapping.split(':')
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if len(parts) != 2:
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LOG.debug(_('Invalid physical network mapping: %s'), mapping)
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else:
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pattern = re.escape(parts[0].strip()).replace('\\*', '.*')
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vswitch = parts[1].strip()
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self._physical_network_mappings[re.compile(pattern)] = vswitch
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def _get_vswitch_for_physical_network(self, phys_network_name):
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for compre in self._physical_network_mappings:
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if phys_network_name is None:
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phys_network_name = ''
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if compre.match(phys_network_name):
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return self._physical_network_mappings[compre]
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# Not found in the mappings, the vswitch has the same name
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return phys_network_name
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def _get_network_vswitch_map_by_port_id(self, port_id):
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for network_id, map in self._network_vswitch_map.iteritems():
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if port_id in map['ports']:
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return (network_id, map)
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def network_delete(self, context, network_id=None):
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LOG.debug(_("network_delete received. "
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"Deleting network %s"), network_id)
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# The network may not be defined on this agent
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if network_id in self._network_vswitch_map:
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self._reclaim_local_network(network_id)
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else:
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LOG.debug(_("Network %s not defined on agent."), network_id)
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def port_delete(self, context, port_id=None):
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LOG.debug(_("port_delete received"))
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self._port_unbound(port_id)
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def port_update(self, context, port=None, network_type=None,
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segmentation_id=None, physical_network=None):
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LOG.debug(_("port_update received"))
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self._treat_vif_port(
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port['id'], port['network_id'],
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network_type, physical_network,
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segmentation_id, port['admin_state_up'])
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def _create_rpc_dispatcher(self):
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return dispatcher.RpcDispatcher([self])
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def _get_vswitch_name(self, network_type, physical_network):
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if network_type != constants.TYPE_LOCAL:
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vswitch_name = self._get_vswitch_for_physical_network(
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physical_network)
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else:
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vswitch_name = CONF.AGENT.local_network_vswitch
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return vswitch_name
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def _provision_network(self, port_id,
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net_uuid, network_type,
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physical_network,
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segmentation_id):
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LOG.info(_("Provisioning network %s"), net_uuid)
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vswitch_name = self._get_vswitch_name(network_type, physical_network)
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if network_type in [constants.TYPE_VLAN, constants.TYPE_FLAT]:
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#Nothing to do
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pass
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elif network_type == constants.TYPE_LOCAL:
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#TODO(alexpilotti): Check that the switch type is private
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#or create it if not existing
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pass
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else:
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raise utils.HyperVException(
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_("Cannot provision unknown network type %(network_type)s "
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"for network %(net_uuid)s"),
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dict(network_type=network_type, net_uuid=net_uuid))
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map = {
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'network_type': network_type,
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'vswitch_name': vswitch_name,
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'ports': [],
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'vlan_id': segmentation_id}
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self._network_vswitch_map[net_uuid] = map
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def _reclaim_local_network(self, net_uuid):
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LOG.info(_("Reclaiming local network %s"), net_uuid)
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del self._network_vswitch_map[net_uuid]
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def _port_bound(self, port_id,
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net_uuid,
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network_type,
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physical_network,
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segmentation_id):
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LOG.debug(_("Binding port %s"), port_id)
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if net_uuid not in self._network_vswitch_map:
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self._provision_network(
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port_id, net_uuid, network_type,
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physical_network, segmentation_id)
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map = self._network_vswitch_map[net_uuid]
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map['ports'].append(port_id)
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self._utils.connect_vnic_to_vswitch(map['vswitch_name'], port_id)
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if network_type == constants.TYPE_VLAN:
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LOG.info(_('Binding VLAN ID %(segmentation_id)s '
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'to switch port %(port_id)s'),
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dict(segmentation_id=segmentation_id, port_id=port_id))
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self._utils.set_vswitch_port_vlan_id(
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segmentation_id,
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port_id)
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elif network_type == constants.TYPE_FLAT:
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#Nothing to do
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pass
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elif network_type == constants.TYPE_LOCAL:
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#Nothing to do
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pass
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else:
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LOG.error(_('Unsupported network type %s'), network_type)
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def _port_unbound(self, port_id):
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(net_uuid, map) = self._get_network_vswitch_map_by_port_id(port_id)
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if net_uuid not in self._network_vswitch_map:
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LOG.info(_('Network %s is not avalailable on this agent'),
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net_uuid)
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return
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LOG.debug(_("Unbinding port %s"), port_id)
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self._utils.disconnect_switch_port(map['vswitch_name'], port_id, True)
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if not map['ports']:
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self._reclaim_local_network(net_uuid)
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def _update_ports(self, registered_ports):
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ports = self._utils.get_vnic_ids()
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if ports == registered_ports:
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return
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added = ports - registered_ports
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removed = registered_ports - ports
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return {'current': ports,
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'added': added,
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'removed': removed}
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def _treat_vif_port(self, port_id, network_id, network_type,
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physical_network, segmentation_id,
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admin_state_up):
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if self._utils.vnic_port_exists(port_id):
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if admin_state_up:
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self._port_bound(port_id, network_id, network_type,
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physical_network, segmentation_id)
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else:
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self._port_unbound(port_id)
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else:
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LOG.debug(_("No port %s defined on agent."), port_id)
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def _treat_devices_added(self, devices):
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resync = False
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for device in devices:
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LOG.info(_("Adding port %s") % device)
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try:
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device_details = self.plugin_rpc.get_device_details(
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self.context,
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device,
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self.agent_id)
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except Exception as e:
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LOG.debug(_(
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"Unable to get port details for device %(device)s: %(e)s"),
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dict(device=device, e=e))
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resync = True
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continue
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if 'port_id' in device_details:
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LOG.info(_(
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"Port %(device)s updated. Details: %(device_details)s") %
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dict(device=device, device_details=device_details))
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self._treat_vif_port(
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device_details['port_id'],
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device_details['network_id'],
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device_details['network_type'],
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device_details['physical_network'],
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device_details['segmentation_id'],
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device_details['admin_state_up'])
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return resync
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def _treat_devices_removed(self, devices):
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resync = False
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for device in devices:
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LOG.info(_("Removing port %s"), device)
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try:
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self.plugin_rpc.update_device_down(self.context,
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device,
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self.agent_id)
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except Exception as e:
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LOG.debug(
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_("Removing port failed for device %(device)s: %(e)s"),
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dict(device=device, e=e))
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resync = True
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continue
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self._port_unbound(device)
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return resync
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def _process_network_ports(self, port_info):
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resync_a = False
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resync_b = False
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if 'added' in port_info:
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resync_a = self._treat_devices_added(port_info['added'])
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if 'removed' in port_info:
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resync_b = self._treat_devices_removed(port_info['removed'])
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# If one of the above operations fails => resync with plugin
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return (resync_a | resync_b)
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def daemon_loop(self):
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sync = True
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ports = set()
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while True:
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try:
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start = time.time()
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if sync:
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LOG.info(_("Agent out of sync with plugin!"))
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ports.clear()
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sync = False
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port_info = self._update_ports(ports)
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# notify plugin about port deltas
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if port_info:
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LOG.debug(_("Agent loop has new devices!"))
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# If treat devices fails - must resync with plugin
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sync = self._process_network_ports(port_info)
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ports = port_info['current']
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except Exception as e:
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LOG.exception(_("Error in agent event loop: %s"), e)
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sync = True
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# sleep till end of polling interval
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elapsed = (time.time() - start)
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if (elapsed < self._polling_interval):
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time.sleep(self._polling_interval - elapsed)
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else:
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LOG.debug(_("Loop iteration exceeded interval "
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"(%(polling_interval)s vs. %(elapsed)s)"),
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{'polling_interval': self._polling_interval,
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'elapsed': elapsed})
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def main():
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eventlet.monkey_patch()
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cfg.CONF(project='neutron')
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logging_config.setup_logging(cfg.CONF)
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plugin = HyperVNeutronAgent()
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# Start everything.
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LOG.info(_("Agent initialized successfully, now running... "))
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plugin.daemon_loop()
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sys.exit(0)
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