132 lines
5.6 KiB
Python
132 lines
5.6 KiB
Python
# Copyright (c) 2013 OpenStack Foundation.
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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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from quantum.common import constants
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from quantum.common import topics
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from quantum.common import utils
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from quantum import manager
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from quantum.openstack.common import log as logging
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from quantum.openstack.common.rpc import proxy
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LOG = logging.getLogger(__name__)
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class DhcpAgentNotifyAPI(proxy.RpcProxy):
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"""API for plugin to notify DHCP agent."""
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BASE_RPC_API_VERSION = '1.0'
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# It seems dhcp agent does not support bulk operation
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VALID_RESOURCES = ['network', 'subnet', 'port']
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VALID_METHOD_NAMES = ['network.create.end',
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'network.update.end',
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'network.delete.end',
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'subnet.create.end',
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'subnet.update.end',
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'subnet.delete.end',
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'port.create.end',
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'port.update.end',
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'port.delete.end']
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def __init__(self, topic=topics.DHCP_AGENT):
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super(DhcpAgentNotifyAPI, self).__init__(
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topic=topic, default_version=self.BASE_RPC_API_VERSION)
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def _get_dhcp_agents(self, context, network_id):
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plugin = manager.QuantumManager.get_plugin()
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dhcp_agents = plugin.get_dhcp_agents_hosting_networks(
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context, [network_id], active=True)
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return [(dhcp_agent.host, dhcp_agent.topic) for
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dhcp_agent in dhcp_agents]
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def _notification_host(self, context, method, payload, host):
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"""Notify the agent on host"""
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self.cast(
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context, self.make_msg(method,
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payload=payload),
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topic='%s.%s' % (topics.DHCP_AGENT, host))
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def _notification(self, context, method, payload, network_id):
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"""Notify all the agents that are hosting the network"""
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plugin = manager.QuantumManager.get_plugin()
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if (method != 'network_delete_end' and utils.is_extension_supported(
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plugin, constants.AGENT_SCHEDULER_EXT_ALIAS)):
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if method == 'port_create_end':
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# we don't schedule when we create network
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# because we want to give admin a chance to
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# schedule network manually by API
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adminContext = (context if context.is_admin else
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context.elevated())
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network = plugin.get_network(adminContext, network_id)
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chosen_agent = plugin.schedule_network(adminContext, network)
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if chosen_agent:
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self._notification_host(
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context, 'network_create_end',
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{'network': {'id': network_id}},
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chosen_agent['host'])
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for (host, topic) in self._get_dhcp_agents(context, network_id):
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self.cast(
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context, self.make_msg(method,
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payload=payload),
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topic='%s.%s' % (topic, host))
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else:
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# besides the non-agentscheduler plugin,
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# There is no way to query who is hosting the network
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# when the network is deleted, so we need to fanout
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self._notification_fanout(context, method, payload)
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def _notification_fanout(self, context, method, payload):
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"""Fanout the payload to all dhcp agents"""
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self.fanout_cast(
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context, self.make_msg(method,
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payload=payload),
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topic=topics.DHCP_AGENT)
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def network_removed_from_agent(self, context, network_id, host):
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self._notification_host(context, 'network_delete_end',
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{'network_id': network_id}, host)
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def network_added_to_agent(self, context, network_id, host):
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self._notification_host(context, 'network_create_end',
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{'network': {'id': network_id}}, host)
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def agent_updated(self, context, admin_state_up, host):
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self._notification_host(context, 'agent_updated',
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{'admin_state_up': admin_state_up},
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host)
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def notify(self, context, data, methodname):
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# data is {'key' : 'value'} with only one key
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if methodname not in self.VALID_METHOD_NAMES:
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return
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obj_type = data.keys()[0]
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if obj_type not in self.VALID_RESOURCES:
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return
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obj_value = data[obj_type]
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network_id = None
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if obj_type == 'network' and 'id' in obj_value:
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network_id = obj_value['id']
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elif obj_type in ['port', 'subnet'] and 'network_id' in obj_value:
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network_id = obj_value['network_id']
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if not network_id:
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return
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methodname = methodname.replace(".", "_")
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if methodname.endswith("_delete_end"):
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if 'id' in obj_value:
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self._notification(context, methodname,
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{obj_type + '_id': obj_value['id']},
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network_id)
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else:
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self._notification(context, methodname, data, network_id)
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