6edbacf4b9
With Cisco/Nexus plugin, migration is not fully supported. Logic to detect port binding change needs to be added in update_port(), and provisioning of nexus switch(es) should be done accordingly added test code for update_port() in the model layer and the db layer Closes-Bug: #1229217 Change-Id: I2bd76030711c9d15462e91da9e4c0836a424834f
543 lines
23 KiB
Python
543 lines
23 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2012 Cisco Systems, Inc.
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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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# @author: Sumit Naiksatam, Cisco Systems, Inc.
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# @author: Rohit Agarwalla, Cisco Systems, Inc.
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#
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import inspect
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import logging
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import sys
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from neutron.api.v2 import attributes
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from neutron.db import api as db_api
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from neutron.extensions import portbindings
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from neutron.extensions import providernet as provider
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from neutron import neutron_plugin_base_v2
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from neutron.openstack.common import importutils
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from neutron.plugins.cisco.common import cisco_constants as const
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from neutron.plugins.cisco.common import cisco_credentials_v2 as cred
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from neutron.plugins.cisco.common import cisco_exceptions as cexc
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from neutron.plugins.cisco.common import config as conf
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from neutron.plugins.cisco.db import network_db_v2 as cdb
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from neutron.plugins.openvswitch import ovs_db_v2 as odb
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LOG = logging.getLogger(__name__)
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class VirtualPhysicalSwitchModelV2(neutron_plugin_base_v2.NeutronPluginBaseV2):
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"""Virtual Physical Switch Model.
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This implementation works with OVS and Nexus plugin for the
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following topology:
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One or more servers to a nexus switch.
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"""
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MANAGE_STATE = True
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__native_bulk_support = True
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supported_extension_aliases = ["provider", "binding"]
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_plugins = {}
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_methods_to_delegate = ['create_network_bulk',
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'get_network', 'get_networks',
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'create_port_bulk',
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'get_port', 'get_ports',
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'create_subnet', 'create_subnet_bulk',
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'delete_subnet', 'update_subnet',
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'get_subnet', 'get_subnets',
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'create_or_update_agent', 'report_state']
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def __init__(self):
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"""Initialize the segmentation manager.
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Checks which device plugins are configured, and load the inventories
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those device plugins for which the inventory is configured.
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"""
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conf.CiscoConfigOptions()
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for key in conf.CISCO_PLUGINS.keys():
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plugin_obj = conf.CISCO_PLUGINS[key]
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if plugin_obj is not None:
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self._plugins[key] = importutils.import_object(plugin_obj)
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LOG.debug(_("Loaded device plugin %s"),
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conf.CISCO_PLUGINS[key])
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if ((const.VSWITCH_PLUGIN in self._plugins) and
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hasattr(self._plugins[const.VSWITCH_PLUGIN],
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"supported_extension_aliases")):
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self.supported_extension_aliases.extend(
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self._plugins[const.VSWITCH_PLUGIN].
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supported_extension_aliases)
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# At this point, all the database models should have been loaded. It's
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# possible that configure_db() may have been called by one of the
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# plugins loaded in above. Otherwise, this call is to make sure that
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# the database is initialized
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db_api.configure_db()
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# Initialize credential store after database initialization
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cred.Store.initialize()
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LOG.debug(_("%(module)s.%(name)s init done"),
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{'module': __name__,
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'name': self.__class__.__name__})
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# Check whether we have a valid Nexus driver loaded
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self.is_nexus_plugin = False
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nexus_driver = conf.CISCO.nexus_driver
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if nexus_driver.endswith('CiscoNEXUSDriver'):
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self.is_nexus_plugin = True
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def __getattribute__(self, name):
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"""Delegate calls to OVS sub-plugin.
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This delegates the calls to the methods implemented only by the OVS
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sub-plugin. Note: Currently, bulking is handled by the caller
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(PluginV2), and this model class expects to receive only non-bulking
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calls. If, however, a bulking call is made, this will method will
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delegate the call to the OVS plugin.
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"""
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super_getattribute = super(VirtualPhysicalSwitchModelV2,
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self).__getattribute__
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methods = super_getattribute('_methods_to_delegate')
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if name in methods:
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plugin = super_getattribute('_plugins')[const.VSWITCH_PLUGIN]
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return getattr(plugin, name)
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try:
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return super_getattribute(name)
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except AttributeError:
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plugin = super_getattribute('_plugins')[const.VSWITCH_PLUGIN]
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return getattr(plugin, name)
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def _func_name(self, offset=0):
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"""Get the name of the calling function."""
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frame_record = inspect.stack()[1 + offset]
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func_name = frame_record[3]
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return func_name
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def _invoke_plugin_per_device(self, plugin_key, function_name,
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args, **kwargs):
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"""Invoke plugin per device.
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Invokes a device plugin's relevant functions (based on the
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plugin implementation) for completing this operation.
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"""
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if plugin_key not in self._plugins:
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LOG.info(_("No %s Plugin loaded"), plugin_key)
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LOG.info(_("%(plugin_key)s: %(function_name)s with args %(args)s "
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"ignored"),
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{'plugin_key': plugin_key, 'function_name': function_name,
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'args': args})
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return
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return [self._invoke_plugin(plugin_key, function_name, args, kwargs)]
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def _invoke_plugin(self, plugin_key, function_name, args, kwargs):
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"""Invoke plugin.
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Invokes the relevant function on a device plugin's
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implementation for completing this operation.
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"""
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func = getattr(self._plugins[plugin_key], function_name)
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func_args_len = int(inspect.getargspec(func).args.__len__()) - 1
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if args.__len__() > func_args_len:
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func_args = args[:func_args_len]
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extra_args = args[func_args_len:]
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for dict_arg in extra_args:
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for k, v in dict_arg.iteritems():
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kwargs[k] = v
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return func(*func_args, **kwargs)
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else:
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return func(*args, **kwargs)
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def _get_segmentation_id(self, network_id):
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binding_seg_id = odb.get_network_binding(None, network_id)
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if not binding_seg_id:
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raise cexc.NetworkSegmentIDNotFound(net_id=network_id)
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return binding_seg_id.segmentation_id
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def _get_provider_vlan_id(self, network):
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if (all(attributes.is_attr_set(network.get(attr))
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for attr in (provider.NETWORK_TYPE,
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provider.PHYSICAL_NETWORK,
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provider.SEGMENTATION_ID))
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and
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network[provider.NETWORK_TYPE] == const.NETWORK_TYPE_VLAN):
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return network[provider.SEGMENTATION_ID]
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def create_network(self, context, network):
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"""Create network.
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Perform this operation in the context of the configured device
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plugins.
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"""
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LOG.debug(_("create_network() called"))
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provider_vlan_id = self._get_provider_vlan_id(network[const.NETWORK])
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args = [context, network]
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ovs_output = self._invoke_plugin_per_device(const.VSWITCH_PLUGIN,
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self._func_name(),
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args)
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# The vswitch plugin did all the verification. If it's a provider
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# vlan network, save it for the nexus plugin to use later.
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if provider_vlan_id:
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network_id = ovs_output[0][const.NET_ID]
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cdb.add_provider_network(network_id,
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const.NETWORK_TYPE_VLAN,
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provider_vlan_id)
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LOG.debug(_("Provider network added to DB: %(network_id)s, "
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"%(vlan_id)s"),
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{'network_id': network_id, 'vlan_id': provider_vlan_id})
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return ovs_output[0]
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def update_network(self, context, id, network):
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"""Update network.
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Perform this operation in the context of the configured device
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plugins.
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Note that the Nexus sub-plugin does not need to be notified
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(and the Nexus switch does not need to be [re]configured)
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for an update network operation because the Nexus sub-plugin
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is agnostic of all network-level attributes except the
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segmentation ID. Furthermore, updating of the segmentation ID
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is not supported by the OVS plugin since it is considered a
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provider attribute, so it is not supported by this method.
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"""
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LOG.debug(_("update_network() called"))
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# We can only support updating of provider attributes if all the
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# configured sub-plugins support it. Currently we have no method
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# in place for checking whether a sub-plugin supports it,
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# so assume not.
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provider._raise_if_updates_provider_attributes(network['network'])
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args = [context, id, network]
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ovs_output = self._invoke_plugin_per_device(const.VSWITCH_PLUGIN,
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self._func_name(),
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args)
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return ovs_output[0]
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def delete_network(self, context, id):
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"""Delete network.
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Perform this operation in the context of the configured device
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plugins.
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"""
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args = [context, id]
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ovs_output = self._invoke_plugin_per_device(const.VSWITCH_PLUGIN,
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self._func_name(),
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args)
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if cdb.remove_provider_network(id):
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LOG.debug(_("Provider network removed from DB: %s"), id)
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return ovs_output[0]
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def get_network(self, context, id, fields=None):
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"""For this model this method will be delegated to vswitch plugin."""
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pass
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def get_networks(self, context, filters=None, fields=None):
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"""For this model this method will be delegated to vswitch plugin."""
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pass
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def _invoke_nexus_for_net_create(self, context, tenant_id, net_id,
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instance_id, host_id):
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if not self.is_nexus_plugin:
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return False
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network = self.get_network(context, net_id)
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vlan_id = self._get_segmentation_id(net_id)
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vlan_name = conf.CISCO.vlan_name_prefix + str(vlan_id)
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network[const.NET_VLAN_ID] = vlan_id
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network[const.NET_VLAN_NAME] = vlan_name
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attachment = {
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const.TENANT_ID: tenant_id,
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const.INSTANCE_ID: instance_id,
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const.HOST_NAME: host_id,
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}
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self._invoke_plugin_per_device(
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const.NEXUS_PLUGIN,
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'create_network',
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[network, attachment])
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def _check_valid_port_device_owner(self, port):
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"""Check the port for valid device_owner.
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Don't call the nexus plugin for router and dhcp
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port owners.
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"""
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return port['device_owner'].startswith('compute')
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def _get_port_host_id_from_bindings(self, port):
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"""Get host_id from portbindings."""
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host_id = None
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if (portbindings.HOST_ID in port and
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attributes.is_attr_set(port[portbindings.HOST_ID])):
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host_id = port[portbindings.HOST_ID]
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return host_id
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def create_port(self, context, port):
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"""Create port.
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Perform this operation in the context of the configured device
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plugins.
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"""
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LOG.debug(_("create_port() called"))
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args = [context, port]
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ovs_output = self._invoke_plugin_per_device(const.VSWITCH_PLUGIN,
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self._func_name(),
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args)
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instance_id = port['port']['device_id']
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# Only call nexus plugin if there's a valid instance_id, host_id
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# and device_owner
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try:
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host_id = self._get_port_host_id_from_bindings(port['port'])
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if (instance_id and host_id and
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self._check_valid_port_device_owner(port['port'])):
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net_id = port['port']['network_id']
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tenant_id = port['port']['tenant_id']
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self._invoke_nexus_for_net_create(
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context, tenant_id, net_id, instance_id, host_id)
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except Exception:
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# Create network on the Nexus plugin has failed, so we need
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# to rollback the port creation on the VSwitch plugin.
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exc_info = sys.exc_info()
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try:
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id = ovs_output[0]['id']
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args = [context, id]
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ovs_output = self._invoke_plugin_per_device(
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const.VSWITCH_PLUGIN,
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'delete_port',
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args)
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finally:
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# Re-raise the original exception
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raise exc_info[0], exc_info[1], exc_info[2]
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return ovs_output[0]
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def get_port(self, context, id, fields=None):
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"""For this model this method will be delegated to vswitch plugin."""
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pass
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def get_ports(self, context, filters=None, fields=None):
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"""For this model this method will be delegated to vswitch plugin."""
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pass
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def _check_nexus_net_create_needed(self, new_port, old_port):
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"""Check if nexus plugin should be invoked for net_create.
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In the following cases, the plugin should be invoked:
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-- a port is attached to a VM instance. The old host id is None
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-- VM migration. The old host id has a valid value
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When the plugin needs to be invoked, return the old_host_id,
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and a list of calling arguments.
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Otherwise, return '' for old host id and an empty list
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"""
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old_device_id = old_port['device_id']
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new_device_id = new_port.get('device_id')
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new_host_id = self._get_port_host_id_from_bindings(new_port)
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tenant_id = old_port['tenant_id']
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net_id = old_port['network_id']
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old_host_id = self._get_port_host_id_from_bindings(old_port)
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LOG.debug(_("tenant_id: %(tid)s, net_id: %(nid)s, "
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"old_device_id: %(odi)s, new_device_id: %(ndi)s, "
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"old_host_id: %(ohi)s, new_host_id: %(nhi)s, "
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"old_device_owner: %(odo)s, new_device_owner: %(ndo)s"),
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{'tid': tenant_id, 'nid': net_id,
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'odi': old_device_id, 'ndi': new_device_id,
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'ohi': old_host_id, 'nhi': new_host_id,
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'odo': old_port.get('device_owner'),
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'ndo': new_port.get('device_owner')})
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# A port is attached to an instance
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if (new_device_id and not old_device_id and new_host_id and
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self._check_valid_port_device_owner(new_port)):
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return '', [tenant_id, net_id, new_device_id, new_host_id]
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# An instance is being migrated
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if (old_device_id and old_host_id and new_host_id != old_host_id and
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self._check_valid_port_device_owner(old_port)):
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return old_host_id, [tenant_id, net_id, old_device_id, new_host_id]
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# no need to invoke the plugin
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return '', []
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def update_port(self, context, id, port):
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"""Update port.
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Perform this operation in the context of the configured device
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plugins.
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"""
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LOG.debug(_("update_port() called"))
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old_port = self.get_port(context, id)
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args = [context, id, port]
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ovs_output = self._invoke_plugin_per_device(const.VSWITCH_PLUGIN,
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self._func_name(),
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args)
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try:
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# Check if the nexus plugin needs to be invoked
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old_host_id, create_args = self._check_nexus_net_create_needed(
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port['port'], old_port)
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# In the case of migration, invoke it to remove
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# the previous port binding
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if old_host_id:
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vlan_id = self._get_segmentation_id(old_port['network_id'])
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delete_args = [old_port['device_id'], vlan_id]
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self._invoke_plugin_per_device(const.NEXUS_PLUGIN,
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"delete_port",
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delete_args)
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# Invoke the Nexus plugin to create a net and/or new port binding
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if create_args:
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self._invoke_nexus_for_net_create(context, *create_args)
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return ovs_output[0]
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except Exception:
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exc_info = sys.exc_info()
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LOG.error(_("Unable to update port '%s' on Nexus switch"),
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old_port['name'], exc_info=exc_info)
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try:
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# Roll back vSwitch plugin to original port attributes.
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args = [context, id, {'port': old_port}]
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ovs_output = self._invoke_plugin_per_device(
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const.VSWITCH_PLUGIN,
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self._func_name(),
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args)
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finally:
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# Re-raise the original exception
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raise exc_info[0], exc_info[1], exc_info[2]
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def delete_port(self, context, id, l3_port_check=True):
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"""Delete port.
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Perform this operation in the context of the configured device
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plugins.
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"""
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LOG.debug(_("delete_port() called"))
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port = self.get_port(context, id)
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host_id = self._get_port_host_id_from_bindings(port)
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if (self.is_nexus_plugin and host_id and
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self._check_valid_port_device_owner(port)):
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vlan_id = self._get_segmentation_id(port['network_id'])
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n_args = [port['device_id'], vlan_id]
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self._invoke_plugin_per_device(const.NEXUS_PLUGIN,
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self._func_name(),
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n_args)
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try:
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args = [context, id]
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ovs_output = self._invoke_plugin_per_device(
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const.VSWITCH_PLUGIN, self._func_name(),
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args, l3_port_check=l3_port_check)
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except Exception:
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exc_info = sys.exc_info()
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# Roll back the delete port on the Nexus plugin
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try:
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tenant_id = port['tenant_id']
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net_id = port['network_id']
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instance_id = port['device_id']
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host_id = port[portbindings.HOST_ID]
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self._invoke_nexus_for_net_create(context, tenant_id, net_id,
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instance_id, host_id)
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finally:
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# Raise the original exception.
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raise exc_info[0], exc_info[1], exc_info[2]
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return ovs_output[0]
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def add_router_interface(self, context, router_id, interface_info):
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"""Add a router interface on a subnet.
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|
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Only invoke the Nexus plugin to create SVI if L3 support on
|
|
the Nexus switches is enabled and a Nexus plugin is loaded,
|
|
otherwise send it to the vswitch plugin
|
|
"""
|
|
if (conf.CISCO.nexus_l3_enable and self.is_nexus_plugin):
|
|
LOG.debug(_("L3 enabled on Nexus plugin, create SVI on switch"))
|
|
if 'subnet_id' not in interface_info:
|
|
raise cexc.SubnetNotSpecified()
|
|
if 'port_id' in interface_info:
|
|
raise cexc.PortIdForNexusSvi()
|
|
subnet = self.get_subnet(context, interface_info['subnet_id'])
|
|
gateway_ip = subnet['gateway_ip']
|
|
# Get gateway IP address and netmask
|
|
cidr = subnet['cidr']
|
|
netmask = cidr.split('/', 1)[1]
|
|
gateway_ip = gateway_ip + '/' + netmask
|
|
network_id = subnet['network_id']
|
|
vlan_id = self._get_segmentation_id(network_id)
|
|
vlan_name = conf.CISCO.vlan_name_prefix + str(vlan_id)
|
|
|
|
n_args = [vlan_name, vlan_id, subnet['id'], gateway_ip, router_id]
|
|
return self._invoke_plugin_per_device(const.NEXUS_PLUGIN,
|
|
self._func_name(),
|
|
n_args)
|
|
else:
|
|
LOG.debug(_("L3 disabled or not Nexus plugin, send to vswitch"))
|
|
n_args = [context, router_id, interface_info]
|
|
return self._invoke_plugin_per_device(const.VSWITCH_PLUGIN,
|
|
self._func_name(),
|
|
n_args)
|
|
|
|
def remove_router_interface(self, context, router_id, interface_info):
|
|
"""Remove a router interface.
|
|
|
|
Only invoke the Nexus plugin to delete SVI if L3 support on
|
|
the Nexus switches is enabled and a Nexus plugin is loaded,
|
|
otherwise send it to the vswitch plugin
|
|
"""
|
|
if (conf.CISCO.nexus_l3_enable and self.is_nexus_plugin):
|
|
LOG.debug(_("L3 enabled on Nexus plugin, delete SVI from switch"))
|
|
|
|
subnet = self.get_subnet(context, interface_info['subnet_id'])
|
|
network_id = subnet['network_id']
|
|
vlan_id = self._get_segmentation_id(network_id)
|
|
n_args = [vlan_id, router_id]
|
|
|
|
return self._invoke_plugin_per_device(const.NEXUS_PLUGIN,
|
|
self._func_name(),
|
|
n_args)
|
|
else:
|
|
LOG.debug(_("L3 disabled or not Nexus plugin, send to vswitch"))
|
|
n_args = [context, router_id, interface_info]
|
|
return self._invoke_plugin_per_device(const.VSWITCH_PLUGIN,
|
|
self._func_name(),
|
|
n_args)
|
|
|
|
def create_subnet(self, context, subnet):
|
|
"""For this model this method will be delegated to vswitch plugin."""
|
|
pass
|
|
|
|
def update_subnet(self, context, id, subnet):
|
|
"""For this model this method will be delegated to vswitch plugin."""
|
|
pass
|
|
|
|
def get_subnet(self, context, id, fields=None):
|
|
"""For this model this method will be delegated to vswitch plugin."""
|
|
pass
|
|
|
|
def delete_subnet(self, context, id, kwargs):
|
|
"""For this model this method will be delegated to vswitch plugin."""
|
|
pass
|
|
|
|
def get_subnets(self, context, filters=None, fields=None):
|
|
"""For this model this method will be delegated to vswitch plugin."""
|
|
pass
|