398 lines
16 KiB
Python
398 lines
16 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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from copy import deepcopy
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import inspect
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import logging
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from novaclient.v1_1 import client as nova_client
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from oslo.config import cfg
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from quantum.db import l3_db
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from quantum.manager import QuantumManager
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from quantum.openstack.common import importutils
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from quantum.plugins.cisco.common import cisco_constants as const
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from quantum.plugins.cisco.common import cisco_credentials_v2 as cred
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from quantum.plugins.cisco.db import network_db_v2 as cdb
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from quantum.plugins.cisco.common import config as conf
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from quantum.plugins.openvswitch import ovs_db_v2 as odb
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from quantum import quantum_plugin_base_v2
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from quantum.db import api as db_api
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LOG = logging.getLogger(__name__)
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class VirtualPhysicalSwitchModelV2(quantum_plugin_base_v2.QuantumPluginBaseV2):
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"""
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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 = []
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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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def __init__(self):
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"""
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Initialize the segmentation manager, check which device plugins are
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configured, and load the inventories those device plugins for which the
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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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self._plugins[key] = importutils.import_object(plugin_obj)
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LOG.debug(_("Loaded device plugin %s\n"), 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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def __getattribute__(self, name):
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"""
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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, args):
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"""
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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"), locals())
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return
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device_params = {const.DEVICE_IP: []}
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return [self._invoke_plugin(plugin_key, function_name, args,
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device_params)]
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def _invoke_plugin(self, plugin_key, function_name, args, kwargs):
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"""
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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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fargs, varargs, varkw, defaults = inspect.getargspec(func)
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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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if (varkw == 'kwargs'):
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return func(*args, **kwargs)
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else:
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return func(*args)
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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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return binding_seg_id.segmentation_id
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def _get_all_segmentation_ids(self):
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vlan_ids = cdb.get_ovs_vlans()
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vlanids = ''
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for v_id in vlan_ids:
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if int(v_id) > 0:
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vlanids = str(v_id) + ',' + vlanids
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return vlanids.strip(',')
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def _validate_vlan_id(self, vlan_id):
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if vlan_id and int(vlan_id) > 1:
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return True
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else:
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return False
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def _get_instance_host(self, tenant_id, instance_id):
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keystone_conf = cfg.CONF.keystone_authtoken
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keystone_auth_url = '%s://%s:%s/v2.0/' % (keystone_conf.auth_protocol,
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keystone_conf.auth_host,
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keystone_conf.auth_port)
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nc = nova_client.Client(keystone_conf.admin_user,
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keystone_conf.admin_password,
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keystone_conf.admin_tenant_name,
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keystone_auth_url,
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no_cache=True)
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serv = nc.servers.get(instance_id)
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host = serv.__getattr__('OS-EXT-SRV-ATTR:host')
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return host
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def create_network(self, context, network):
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"""
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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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try:
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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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vlan_id = self._get_segmentation_id(ovs_output[0]['id'])
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if not self._validate_vlan_id(vlan_id):
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return ovs_output[0]
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vlan_name = conf.CISCO.vlan_name_prefix + str(vlan_id)
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vlanids = self._get_all_segmentation_ids()
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args = [ovs_output[0]['tenant_id'], ovs_output[0]['name'],
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ovs_output[0]['id'], vlan_name, vlan_id,
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{'vlan_ids': vlanids}]
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return ovs_output[0]
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except:
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# TODO (Sumit): Check if we need to perform any rollback here
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raise
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def update_network(self, context, id, network):
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"""
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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_network() called"))
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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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vlan_id = self._get_segmentation_id(ovs_output[0]['id'])
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if not self._validate_vlan_id(vlan_id):
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return ovs_output[0]
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vlanids = self._get_all_segmentation_ids()
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args = [ovs_output[0]['tenant_id'], id, {'vlan_id': vlan_id},
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{'net_admin_state': ovs_output[0]['admin_state_up']},
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{'vlan_ids': vlanids}]
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nexus_output = self._invoke_plugin_per_device(const.NEXUS_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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"""
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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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try:
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base_plugin_ref = QuantumManager.get_plugin()
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n = base_plugin_ref.get_network(context, id)
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tenant_id = n['tenant_id']
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vlan_id = self._get_segmentation_id(id)
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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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args = [tenant_id, id, {const.VLANID: vlan_id},
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{const.CONTEXT: context},
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{const.BASE_PLUGIN_REF: base_plugin_ref}]
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if self._validate_vlan_id(vlan_id):
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self._invoke_plugin_per_device(const.NEXUS_PLUGIN,
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self._func_name(), args)
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return ovs_output[0]
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except:
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raise
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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):
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net_dict = self.get_network(context, net_id)
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net_name = net_dict['name']
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vlan_id = self._get_segmentation_id(net_id)
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host = self._get_instance_host(tenant_id, instance_id)
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# Trunk segmentation id for only this host
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vlan_name = conf.CISCO.vlan_name_prefix + str(vlan_id)
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n_args = [tenant_id, net_name, net_id,
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vlan_name, vlan_id, host, instance_id]
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nexus_output = self._invoke_plugin_per_device(
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const.NEXUS_PLUGIN,
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'create_network',
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n_args)
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return nexus_output
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def create_port(self, context, port):
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"""
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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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try:
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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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device_owner = port['port']['device_owner']
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if conf.CISCO_TEST.host is not None:
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host = conf.CISCO_TEST.host
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elif device_owner == 'network:dhcp':
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return ovs_output[0]
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elif instance_id:
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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)
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return ovs_output[0]
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except:
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# TODO (asomya): Check if we need to perform any rollback here
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raise
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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 update_port(self, context, id, port):
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"""
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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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try:
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# Get port
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old_port = self.get_port(context, id)
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# Check old port device_id
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old_device = old_port['device_id']
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# Update port with vswitch plugin
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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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net_id = old_port['network_id']
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instance_id = ''
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if 'device_id' in port['port']:
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instance_id = port['port']['device_id']
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# Check if there's a new device_id
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if instance_id and not old_device:
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tenant_id = old_port['tenant_id']
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self._invoke_nexus_for_net_create(
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context, tenant_id, net_id, instance_id)
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return ovs_output[0]
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except:
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raise
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def delete_port(self, context, id):
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"""
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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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try:
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args = [context, id]
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port = self.get_port(context, id)
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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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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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nexus_output = 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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return ovs_output[0]
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except:
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# TODO (asomya): Check if we need to perform any rollback here
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raise
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def create_subnet(self, context, subnet):
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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 update_subnet(self, context, id, subnet):
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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_subnet(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 delete_subnet(self, context, id, kwargs):
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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_subnets(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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