c69b666610
bug #1042030 - adds admin-writable, world-readable router:external attribute to the network object if L3 extension is loaded. - prevents floating ips from being created unless network is external - shortens L3 extensions alias from 'os-quantum-router' to 'router' to make attribute extensions more readable. WIP: - Need to add policy logic so non-admin users can always see external networks without requiring that these networks are shared (since VMs can always create ports on shared networks, but provider may want to have externals networks that VMs cannot directly plug into. Random clean-up: - prevent delete_network in plugins from implying it returns something - modify extensions.py so that exceptions during calls to get_extended_resources() will actually be logged if unexpected. - unset executable bit on test_iptables_manager.py to make sure tox actually runs it. Change-Id: I5bbf063927b93458da7cb467d9ad5c92ebabbbf7
384 lines
16 KiB
Python
384 lines
16 KiB
Python
# Copyright (c) 2012 OpenStack, LLC.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import logging
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import sys
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from quantum.api.v2 import attributes
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from quantum.common import constants
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from quantum.common import exceptions as q_exc
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from quantum.common import topics
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from quantum.db import api as db_api
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from quantum.db import db_base_plugin_v2
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from quantum.db import dhcp_rpc_base
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from quantum.db import l3_db
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from quantum.db import models_v2
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from quantum.extensions import providernet as provider
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from quantum.openstack.common import context
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from quantum.openstack.common import cfg
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from quantum.openstack.common import rpc
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from quantum.openstack.common.rpc import dispatcher
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from quantum.openstack.common.rpc import proxy
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from quantum.plugins.linuxbridge.common import constants as lconst
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from quantum.plugins.linuxbridge.db import l2network_db_v2 as db
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from quantum import policy
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LOG = logging.getLogger(__name__)
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class LinuxBridgeRpcCallbacks(dhcp_rpc_base.DhcpRpcCallbackMixin):
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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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# Device names start with "tap"
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TAP_PREFIX_LEN = 3
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def __init__(self, rpc_context):
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self.rpc_context = rpc_context
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def create_rpc_dispatcher(self):
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'''Get the rpc dispatcher for this manager.
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If a manager would like to set an rpc API version, or support more than
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one class as the target of rpc messages, override this method.
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'''
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return dispatcher.RpcDispatcher([self])
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def get_device_details(self, rpc_context, **kwargs):
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"""Agent requests device details"""
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agent_id = kwargs.get('agent_id')
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device = kwargs.get('device')
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LOG.debug("Device %s details requested from %s", device, agent_id)
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port = db.get_port_from_device(device[self.TAP_PREFIX_LEN:])
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if port:
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binding = db.get_network_binding(db_api.get_session(),
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port['network_id'])
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entry = {'device': device,
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'physical_network': binding.physical_network,
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'vlan_id': binding.vlan_id,
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'network_id': port['network_id'],
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'port_id': port['id'],
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'admin_state_up': port['admin_state_up']}
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# Set the port status to UP
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db.set_port_status(port['id'], constants.PORT_STATUS_ACTIVE)
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else:
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entry = {'device': device}
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LOG.debug("%s can not be found in database", device)
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return entry
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def update_device_down(self, rpc_context, **kwargs):
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"""Device no longer exists on agent"""
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# (TODO) garyk - live migration and port status
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agent_id = kwargs.get('agent_id')
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device = kwargs.get('device')
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LOG.debug("Device %s no longer exists on %s", device, agent_id)
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port = db.get_port_from_device(device[self.TAP_PREFIX_LEN:])
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if port:
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entry = {'device': device,
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'exists': True}
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# Set port status to DOWN
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db.set_port_status(port['id'], constants.PORT_STATUS_DOWN)
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else:
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entry = {'device': device,
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'exists': False}
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LOG.debug("%s can not be found in database", device)
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return entry
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class AgentNotifierApi(proxy.RpcProxy):
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'''Agent side of the linux bridge rpc API.
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API version history:
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1.0 - Initial version.
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'''
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BASE_RPC_API_VERSION = '1.0'
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def __init__(self, topic):
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super(AgentNotifierApi, self).__init__(
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topic=topic, default_version=self.BASE_RPC_API_VERSION)
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self.topic_network_delete = topics.get_topic_name(topic,
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topics.NETWORK,
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topics.DELETE)
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self.topic_port_update = topics.get_topic_name(topic,
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topics.PORT,
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topics.UPDATE)
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def network_delete(self, context, network_id):
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self.fanout_cast(context,
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self.make_msg('network_delete',
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network_id=network_id),
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topic=self.topic_network_delete)
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def port_update(self, context, port, physical_network, vlan_id):
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self.fanout_cast(context,
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self.make_msg('port_update',
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port=port,
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physical_network=physical_network,
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vlan_id=vlan_id),
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topic=self.topic_port_update)
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class LinuxBridgePluginV2(db_base_plugin_v2.QuantumDbPluginV2,
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l3_db.L3_NAT_db_mixin):
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"""Implement the Quantum abstractions using Linux bridging.
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A new VLAN is created for each network. An agent is relied upon
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to perform the actual Linux bridge configuration on each host.
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The provider extension is also supported. As discussed in
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https://bugs.launchpad.net/quantum/+bug/1023156, this class could
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be simplified, and filtering on extended attributes could be
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handled, by adding support for extended attributes to the
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QuantumDbPluginV2 base class. When that occurs, this class should
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be updated to take advantage of it.
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"""
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# This attribute specifies whether the plugin supports or not
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# bulk operations. Name mangling is used in order to ensure it
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# is qualified by class
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__native_bulk_support = True
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supported_extension_aliases = ["provider", "router"]
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def __init__(self):
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db.initialize()
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self._parse_network_vlan_ranges()
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db.sync_network_states(self.network_vlan_ranges)
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self.agent_rpc = cfg.CONF.AGENT.rpc
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self._setup_rpc()
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LOG.debug("Linux Bridge Plugin initialization complete")
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def _setup_rpc(self):
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# RPC support
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self.topic = topics.PLUGIN
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self.rpc_context = context.RequestContext('quantum', 'quantum',
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is_admin=False)
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self.conn = rpc.create_connection(new=True)
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self.callbacks = LinuxBridgeRpcCallbacks(self.rpc_context)
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self.dispatcher = self.callbacks.create_rpc_dispatcher()
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self.conn.create_consumer(self.topic, self.dispatcher,
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fanout=False)
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# Consume from all consumers in a thread
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self.conn.consume_in_thread()
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self.notifier = AgentNotifierApi(topics.AGENT)
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def _parse_network_vlan_ranges(self):
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self.network_vlan_ranges = {}
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for entry in cfg.CONF.VLANS.network_vlan_ranges:
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if ':' in entry:
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try:
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physical_network, vlan_min, vlan_max = entry.split(':')
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self._add_network_vlan_range(physical_network,
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int(vlan_min),
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int(vlan_max))
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except ValueError as ex:
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LOG.error("Invalid network VLAN range: \'%s\' - %s" %
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(entry, ex))
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sys.exit(1)
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else:
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self._add_network(entry)
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LOG.debug("network VLAN ranges: %s" % self.network_vlan_ranges)
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def _add_network_vlan_range(self, physical_network, vlan_min, vlan_max):
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self._add_network(physical_network)
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self.network_vlan_ranges[physical_network].append((vlan_min, vlan_max))
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def _add_network(self, physical_network):
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if physical_network not in self.network_vlan_ranges:
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self.network_vlan_ranges[physical_network] = []
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# REVISIT(rkukura) Use core mechanism for attribute authorization
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# when available.
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def _check_provider_view_auth(self, context, network):
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return policy.check(context,
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"extension:provider_network:view",
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network)
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def _enforce_provider_set_auth(self, context, network):
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return policy.enforce(context,
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"extension:provider_network:set",
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network)
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def _extend_network_dict_provider(self, context, network):
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if self._check_provider_view_auth(context, network):
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binding = db.get_network_binding(context.session, network['id'])
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network[provider.PHYSICAL_NETWORK] = binding.physical_network
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if binding.vlan_id == lconst.FLAT_VLAN_ID:
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network[provider.NETWORK_TYPE] = 'flat'
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network[provider.SEGMENTATION_ID] = None
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else:
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network[provider.NETWORK_TYPE] = 'vlan'
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network[provider.SEGMENTATION_ID] = binding.vlan_id
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def _process_provider_create(self, context, attrs):
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network_type = attrs.get(provider.NETWORK_TYPE)
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physical_network = attrs.get(provider.PHYSICAL_NETWORK)
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segmentation_id = attrs.get(provider.SEGMENTATION_ID)
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network_type_set = attributes.is_attr_set(network_type)
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physical_network_set = attributes.is_attr_set(physical_network)
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segmentation_id_set = attributes.is_attr_set(segmentation_id)
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if not (network_type_set or physical_network_set or
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segmentation_id_set):
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return (None, None, None)
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# Authorize before exposing plugin details to client
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self._enforce_provider_set_auth(context, attrs)
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if not network_type_set:
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msg = _("provider:network_type required")
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raise q_exc.InvalidInput(error_message=msg)
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elif network_type == 'flat':
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if segmentation_id_set:
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msg = _("provider:segmentation_id specified for flat network")
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raise q_exc.InvalidInput(error_message=msg)
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else:
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segmentation_id = lconst.FLAT_VLAN_ID
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elif network_type == 'vlan':
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if not segmentation_id_set:
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msg = _("provider:segmentation_id required")
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raise q_exc.InvalidInput(error_message=msg)
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if segmentation_id < 1 or segmentation_id > 4094:
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msg = _("provider:segmentation_id out of range "
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"(1 through 4094)")
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raise q_exc.InvalidInput(error_message=msg)
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else:
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msg = _("invalid provider:network_type %s" % network_type)
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raise q_exc.InvalidInput(error_message=msg)
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if physical_network_set:
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if physical_network not in self.network_vlan_ranges:
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msg = _("unknown provider:physical_network %s" %
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physical_network)
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raise q_exc.InvalidInput(error_message=msg)
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elif 'default' in self.network_vlan_ranges:
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physical_network = 'default'
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else:
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msg = _("provider:physical_network required")
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raise q_exc.InvalidInput(error_message=msg)
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return (network_type, physical_network, segmentation_id)
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def _check_provider_update(self, context, attrs):
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network_type = attrs.get(provider.NETWORK_TYPE)
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physical_network = attrs.get(provider.PHYSICAL_NETWORK)
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segmentation_id = attrs.get(provider.SEGMENTATION_ID)
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network_type_set = attributes.is_attr_set(network_type)
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physical_network_set = attributes.is_attr_set(physical_network)
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segmentation_id_set = attributes.is_attr_set(segmentation_id)
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if not (network_type_set or physical_network_set or
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segmentation_id_set):
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return
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# Authorize before exposing plugin details to client
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self._enforce_provider_set_auth(context, attrs)
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msg = _("plugin does not support updating provider attributes")
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raise q_exc.InvalidInput(error_message=msg)
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def create_network(self, context, network):
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(network_type, physical_network,
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vlan_id) = self._process_provider_create(context,
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network['network'])
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session = context.session
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with session.begin(subtransactions=True):
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if not network_type:
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physical_network, vlan_id = db.reserve_network(session)
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else:
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db.reserve_specific_network(session, physical_network, vlan_id)
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net = super(LinuxBridgePluginV2, self).create_network(context,
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network)
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db.add_network_binding(session, net['id'],
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physical_network, vlan_id)
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self._process_l3_create(context, network['network'], net['id'])
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self._extend_network_dict_provider(context, net)
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self._extend_network_dict_l3(context, net)
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# note - exception will rollback entire transaction
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return net
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def update_network(self, context, id, network):
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self._check_provider_update(context, network['network'])
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session = context.session
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with session.begin(subtransactions=True):
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net = super(LinuxBridgePluginV2, self).update_network(context, id,
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network)
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self._process_l3_update(context, network['network'], id)
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self._extend_network_dict_provider(context, net)
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self._extend_network_dict_l3(context, net)
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return net
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def delete_network(self, context, id):
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session = context.session
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with session.begin(subtransactions=True):
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binding = db.get_network_binding(session, id)
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result = super(LinuxBridgePluginV2, self).delete_network(context,
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id)
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db.release_network(session, binding.physical_network,
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binding.vlan_id, self.network_vlan_ranges)
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# the network_binding record is deleted via cascade from
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# the network record, so explicit removal is not necessary
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if self.agent_rpc:
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self.notifier.network_delete(self.rpc_context, id)
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def get_network(self, context, id, fields=None):
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net = super(LinuxBridgePluginV2, self).get_network(context, id, None)
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self._extend_network_dict_provider(context, net)
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self._extend_network_dict_l3(context, net)
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return self._fields(net, fields)
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def get_networks(self, context, filters=None, fields=None):
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nets = super(LinuxBridgePluginV2, self).get_networks(context, filters,
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None)
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for net in nets:
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self._extend_network_dict_provider(context, net)
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self._extend_network_dict_l3(context, net)
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# TODO(rkukura): Filter on extended provider attributes.
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nets = self._filter_nets_l3(context, nets, filters)
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return [self._fields(net, fields) for net in nets]
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def update_port(self, context, id, port):
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if self.agent_rpc:
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original_port = super(LinuxBridgePluginV2, self).get_port(context,
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id)
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port = super(LinuxBridgePluginV2, self).update_port(context, id, port)
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if self.agent_rpc:
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if original_port['admin_state_up'] != port['admin_state_up']:
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binding = db.get_network_binding(context.session,
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port['network_id'])
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self.notifier.port_update(self.rpc_context, port,
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binding.physical_network,
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binding.vlan_id)
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return port
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def delete_port(self, context, id, l3_port_check=True):
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# if needed, check to see if this is a port owned by
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# and l3-router. If so, we should prevent deletion.
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if l3_port_check:
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self.prevent_l3_port_deletion(context, id)
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self.disassociate_floatingips(context, id)
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return super(LinuxBridgePluginV2, self).delete_port(context, id)
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