e609209299
Implements blueprint cisco-v2-meta-plugin This patch allows a stand alone plugin to be configured as a device sub-plugin. (changes are contained within the cisco plugin only) Change-Id: I4de53afc3a7e8c79ab8637fe04a90da1d1b05342
252 lines
10 KiB
Python
252 lines
10 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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#
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# Copyright 2012 Cisco Systems, Inc. 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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from copy import deepcopy
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import inspect
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import logging
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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 import l2network_plugin_configuration 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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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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supported_extension_aliases = []
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_plugins = {}
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_inventory = {}
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_methods_to_delegate = ['update_network', 'get_network', 'get_networks',
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'create_port', 'delete_port', 'update_port',
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'get_port', 'get_ports',
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'create_subnet', '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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cdb.initialize()
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cred.Store.initialize()
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for key in conf.PLUGINS[const.PLUGINS].keys():
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plugin_obj = conf.PLUGINS[const.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" %
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conf.PLUGINS[const.PLUGINS][key])
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if key in conf.PLUGINS[const.INVENTORY].keys():
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inventory_obj = conf.PLUGINS[const.INVENTORY][key]
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self._inventory[key] = importutils.import_object(inventory_obj)
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LOG.debug("Loaded device inventory %s\n" %
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conf.PLUGINS[const.INVENTORY][key])
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LOG.debug("%s.%s init done" % (__name__, self.__class__.__name__))
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def __getattribute__(self, name):
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methods = object.__getattribute__(self, "_methods_to_delegate")
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if name in methods:
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return getattr(object.__getattribute__(self, "_plugins")
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[const.VSWITCH_PLUGIN], name)
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else:
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return object.__getattribute__(self, 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 (on the it's
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inventory and plugin implementation) for completing this operation.
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"""
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if not plugin_key in self._plugins.keys():
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LOG.info("No %s Plugin loaded" % plugin_key)
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LOG.info("%s: %s with args %s ignored" %
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(plugin_key, function_name, args))
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return
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device_params = self._invoke_inventory(plugin_key, function_name,
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args)
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device_ips = device_params[const.DEVICE_IP]
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if not device_ips:
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return [self._invoke_plugin(plugin_key, function_name, args,
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device_params)]
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else:
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output = []
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for device_ip in device_ips:
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new_device_params = deepcopy(device_params)
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new_device_params[const.DEVICE_IP] = device_ip
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output.append(self._invoke_plugin(plugin_key, function_name,
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args, new_device_params))
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return output
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def _invoke_inventory(self, plugin_key, function_name, args):
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"""
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Invokes the relevant function on a device plugin's
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inventory for completing this operation.
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"""
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if not plugin_key in self._inventory.keys():
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LOG.info("No %s inventory loaded" % plugin_key)
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LOG.info("%s: %s with args %s ignored" %
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(plugin_key, function_name, args))
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return {const.DEVICE_IP: []}
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else:
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return getattr(self._inventory[plugin_key], function_name)(args)
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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 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\n")
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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 = odb.get_vlan(ovs_output[0]['id'])
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vlan_name = conf.VLAN_NAME_PREFIX + str(vlan_id)
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vlan_ids = odb.get_vlans()
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vlanids = ''
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for v_id in vlan_ids:
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vlanids = str(v_id[0]) + ',' + vlanids
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vlanids = vlanids.strip(',')
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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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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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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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"""For this model this method will be delegated to vswitch plugin"""
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pass
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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 = odb.get_vlan(id)
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output = []
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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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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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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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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, verbose=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, verbose=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 create_port(self, context, port):
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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_port(self, context, id, fields=None, verbose=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, verbose=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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"""For this model this method will be delegated to vswitch plugin"""
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pass
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def delete_port(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 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, verbose=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, verbose=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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