c939aee8d6
Previously neutron was keeping track of dhcp lease time in order to ensure it didn't hand out an ip address that was already leased. This patch removes that logic and instead leverages the dhcp_release utility. This allows us to reuse ip addresses immediately after a port is deleted. This patch also bumps the lease time to 24 hours instead of 2 minutes with reduces the amount of dhcp traffic. DocImpact There is a DocImpact for this bug related to the upgrade path. One should first upgrade their dhcp-agents. Then wait till the dhcp_lease time has expired. Lastly, update neutron-server in order to avoid the case where an instance is deleted and the dnsmasq process has not released the lease and neturon allocates that ip to a new port. Fixes bug: 1202392 Implements blueprint: remove-dhcp-lease Change-Id: Ifcb4f093c92904ceb896438987d53e692eb7fb26
825 lines
32 KiB
Python
825 lines
32 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2012 OpenStack Foundation
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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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import os
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import socket
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import uuid
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import eventlet
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import netaddr
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from oslo.config import cfg
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from neutron.agent.common import config
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from neutron.agent.linux import dhcp
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from neutron.agent.linux import external_process
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from neutron.agent.linux import interface
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from neutron.agent.linux import ip_lib
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from neutron.agent import rpc as agent_rpc
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from neutron.common import constants
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from neutron.common import exceptions
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from neutron.common import legacy
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from neutron.common import topics
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from neutron.common import utils
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from neutron import context
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from neutron import manager
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from neutron.openstack.common import importutils
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from neutron.openstack.common import log as logging
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from neutron.openstack.common import loopingcall
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from neutron.openstack.common.rpc import proxy
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from neutron.openstack.common import service
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from neutron import service as neutron_service
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LOG = logging.getLogger(__name__)
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NS_PREFIX = 'qdhcp-'
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METADATA_DEFAULT_PREFIX = 16
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METADATA_DEFAULT_IP = '169.254.169.254/%d' % METADATA_DEFAULT_PREFIX
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METADATA_PORT = 80
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class DhcpAgent(manager.Manager):
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OPTS = [
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cfg.IntOpt('resync_interval', default=5,
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help=_("Interval to resync.")),
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cfg.StrOpt('dhcp_driver',
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default='neutron.agent.linux.dhcp.Dnsmasq',
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help=_("The driver used to manage the DHCP server.")),
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cfg.BoolOpt('use_namespaces', default=True,
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help=_("Allow overlapping IP.")),
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cfg.BoolOpt('enable_isolated_metadata', default=False,
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help=_("Support Metadata requests on isolated networks.")),
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cfg.BoolOpt('enable_metadata_network', default=False,
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help=_("Allows for serving metadata requests from a "
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"dedicated network. Requires "
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"enable_isolated_metadata = True")),
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cfg.IntOpt('num_sync_threads', default=4,
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help=_('Number of threads to use during sync process.')),
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]
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def __init__(self, host=None):
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super(DhcpAgent, self).__init__(host=host)
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self.needs_resync = False
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self.conf = cfg.CONF
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self.cache = NetworkCache()
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self.root_helper = config.get_root_helper(self.conf)
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self.dhcp_driver_cls = importutils.import_class(self.conf.dhcp_driver)
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ctx = context.get_admin_context_without_session()
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self.plugin_rpc = DhcpPluginApi(topics.PLUGIN, ctx)
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self.device_manager = DeviceManager(self.conf, self.plugin_rpc)
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# create dhcp dir to store dhcp info
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dhcp_dir = os.path.dirname("/%s/dhcp/" % self.conf.state_path)
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if not os.path.isdir(dhcp_dir):
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os.makedirs(dhcp_dir, 0o755)
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self.dhcp_version = self.dhcp_driver_cls.check_version()
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self._populate_networks_cache()
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def _populate_networks_cache(self):
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"""Populate the networks cache when the DHCP-agent starts."""
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try:
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existing_networks = self.dhcp_driver_cls.existing_dhcp_networks(
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self.conf,
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self.root_helper
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)
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for net_id in existing_networks:
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net = DictModel({"id": net_id, "subnets": [], "ports": []})
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self.cache.put(net)
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except NotImplementedError:
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# just go ahead with an empty networks cache
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LOG.debug(
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_("The '%s' DHCP-driver does not support retrieving of a "
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"list of existing networks"),
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self.conf.dhcp_driver
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)
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def after_start(self):
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self.run()
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LOG.info(_("DHCP agent started"))
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def run(self):
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"""Activate the DHCP agent."""
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self.sync_state()
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self.periodic_resync()
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def _ns_name(self, network):
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if self.conf.use_namespaces:
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return NS_PREFIX + network.id
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def call_driver(self, action, network, **action_kwargs):
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"""Invoke an action on a DHCP driver instance."""
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try:
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# the Driver expects something that is duck typed similar to
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# the base models.
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driver = self.dhcp_driver_cls(self.conf,
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network,
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self.root_helper,
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self.device_manager,
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self._ns_name(network),
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self.dhcp_version)
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getattr(driver, action)(**action_kwargs)
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return True
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except Exception:
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self.needs_resync = True
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LOG.exception(_('Unable to %s dhcp.'), action)
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def sync_state(self):
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"""Sync the local DHCP state with Neutron."""
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LOG.info(_('Synchronizing state'))
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pool = eventlet.GreenPool(cfg.CONF.num_sync_threads)
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known_network_ids = set(self.cache.get_network_ids())
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try:
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active_networks = self.plugin_rpc.get_active_networks_info()
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active_network_ids = set(network.id for network in active_networks)
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for deleted_id in known_network_ids - active_network_ids:
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try:
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self.disable_dhcp_helper(deleted_id)
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except Exception:
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self.needs_resync = True
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LOG.exception(_('Unable to sync network state on deleted '
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'network %s') % deleted_id)
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for network in active_networks:
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pool.spawn_n(self.configure_dhcp_for_network, network)
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except Exception:
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self.needs_resync = True
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LOG.exception(_('Unable to sync network state.'))
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def _periodic_resync_helper(self):
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"""Resync the dhcp state at the configured interval."""
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while True:
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eventlet.sleep(self.conf.resync_interval)
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if self.needs_resync:
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self.needs_resync = False
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self.sync_state()
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def periodic_resync(self):
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"""Spawn a thread to periodically resync the dhcp state."""
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eventlet.spawn(self._periodic_resync_helper)
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def enable_dhcp_helper(self, network_id):
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"""Enable DHCP for a network that meets enabling criteria."""
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try:
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network = self.plugin_rpc.get_network_info(network_id)
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except Exception:
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self.needs_resync = True
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LOG.exception(_('Network %s RPC info call failed.'), network_id)
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return
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self.configure_dhcp_for_network(network)
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def configure_dhcp_for_network(self, network):
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if not network.admin_state_up:
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return
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for subnet in network.subnets:
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if subnet.enable_dhcp:
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if self.call_driver('enable', network):
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if (self.conf.use_namespaces and
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self.conf.enable_isolated_metadata):
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self.enable_isolated_metadata_proxy(network)
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self.cache.put(network)
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break
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def disable_dhcp_helper(self, network_id):
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"""Disable DHCP for a network known to the agent."""
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network = self.cache.get_network_by_id(network_id)
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if network:
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if (self.conf.use_namespaces and
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self.conf.enable_isolated_metadata):
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self.disable_isolated_metadata_proxy(network)
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if self.call_driver('disable', network):
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self.cache.remove(network)
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def refresh_dhcp_helper(self, network_id):
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"""Refresh or disable DHCP for a network depending on the current state
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of the network.
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"""
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old_network = self.cache.get_network_by_id(network_id)
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if not old_network:
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# DHCP current not running for network.
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return self.enable_dhcp_helper(network_id)
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try:
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network = self.plugin_rpc.get_network_info(network_id)
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except Exception:
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self.needs_resync = True
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LOG.exception(_('Network %s RPC info call failed.'), network_id)
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return
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old_cidrs = set(s.cidr for s in old_network.subnets if s.enable_dhcp)
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new_cidrs = set(s.cidr for s in network.subnets if s.enable_dhcp)
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if new_cidrs and old_cidrs == new_cidrs:
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self.call_driver('reload_allocations', network)
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self.cache.put(network)
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elif new_cidrs:
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if self.call_driver('restart', network):
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self.cache.put(network)
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else:
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self.disable_dhcp_helper(network.id)
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if new_cidrs:
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self.device_manager.update(network)
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def release_lease_for_removed_ips(self, port, network):
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"""Releases the dhcp lease for ips removed from a port."""
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prev_port = self.cache.get_port_by_id(port.id)
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if prev_port:
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previous_ips = set(fixed_ip.ip_address
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for fixed_ip in prev_port.fixed_ips)
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current_ips = set(fixed_ip.ip_address
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for fixed_ip in port.fixed_ips)
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# pass in port with removed ips on it
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removed_ips = previous_ips - current_ips
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if removed_ips:
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self.call_driver('release_lease',
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network,
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mac_address=port.mac_address,
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removed_ips=removed_ips)
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@utils.synchronized('dhcp-agent')
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def network_create_end(self, context, payload):
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"""Handle the network.create.end notification event."""
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network_id = payload['network']['id']
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self.enable_dhcp_helper(network_id)
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@utils.synchronized('dhcp-agent')
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def network_update_end(self, context, payload):
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"""Handle the network.update.end notification event."""
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network_id = payload['network']['id']
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if payload['network']['admin_state_up']:
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self.enable_dhcp_helper(network_id)
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else:
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self.disable_dhcp_helper(network_id)
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@utils.synchronized('dhcp-agent')
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def network_delete_end(self, context, payload):
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"""Handle the network.delete.end notification event."""
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self.disable_dhcp_helper(payload['network_id'])
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@utils.synchronized('dhcp-agent')
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def subnet_update_end(self, context, payload):
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"""Handle the subnet.update.end notification event."""
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network_id = payload['subnet']['network_id']
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self.refresh_dhcp_helper(network_id)
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# Use the update handler for the subnet create event.
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subnet_create_end = subnet_update_end
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@utils.synchronized('dhcp-agent')
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def subnet_delete_end(self, context, payload):
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"""Handle the subnet.delete.end notification event."""
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subnet_id = payload['subnet_id']
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network = self.cache.get_network_by_subnet_id(subnet_id)
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if network:
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self.refresh_dhcp_helper(network.id)
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@utils.synchronized('dhcp-agent')
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def port_update_end(self, context, payload):
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"""Handle the port.update.end notification event."""
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port = DictModel(payload['port'])
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network = self.cache.get_network_by_id(port.network_id)
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if network:
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self.release_lease_for_removed_ips(port, network)
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self.cache.put_port(port)
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self.call_driver('reload_allocations', network)
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# Use the update handler for the port create event.
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port_create_end = port_update_end
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@utils.synchronized('dhcp-agent')
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def port_delete_end(self, context, payload):
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"""Handle the port.delete.end notification event."""
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port = self.cache.get_port_by_id(payload['port_id'])
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if port:
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network = self.cache.get_network_by_id(port.network_id)
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self.cache.remove_port(port)
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removed_ips = [fixed_ip.ip_address
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for fixed_ip in port.fixed_ips]
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self.call_driver('release_lease',
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network,
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mac_address=port.mac_address,
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removed_ips=removed_ips)
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self.call_driver('reload_allocations', network)
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def enable_isolated_metadata_proxy(self, network):
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# The proxy might work for either a single network
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# or all the networks connected via a router
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# to the one passed as a parameter
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neutron_lookup_param = '--network_id=%s' % network.id
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meta_cidr = netaddr.IPNetwork(METADATA_DEFAULT_IP)
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has_metadata_subnet = any(netaddr.IPNetwork(s.cidr) in meta_cidr
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for s in network.subnets)
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if (self.conf.enable_metadata_network and has_metadata_subnet):
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router_ports = [port for port in network.ports
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if (port.device_owner ==
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constants.DEVICE_OWNER_ROUTER_INTF)]
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if router_ports:
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# Multiple router ports should not be allowed
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if len(router_ports) > 1:
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LOG.warning(_("%(port_num)d router ports found on the "
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"metadata access network. Only the port "
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"%(port_id)s, for router %(router_id)s "
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"will be considered"),
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{'port_num': len(router_ports),
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'port_id': router_ports[0].id,
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'router_id': router_ports[0].device_id})
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neutron_lookup_param = ('--router_id=%s' %
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router_ports[0].device_id)
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def callback(pid_file):
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proxy_cmd = ['neutron-ns-metadata-proxy',
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'--pid_file=%s' % pid_file,
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neutron_lookup_param,
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'--state_path=%s' % self.conf.state_path,
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'--metadata_port=%d' % METADATA_PORT]
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proxy_cmd.extend(config.get_log_args(
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cfg.CONF, 'neutron-ns-metadata-proxy-%s.log' % network.id))
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return proxy_cmd
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pm = external_process.ProcessManager(
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self.conf,
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network.id,
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self.root_helper,
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self._ns_name(network))
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pm.enable(callback)
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def disable_isolated_metadata_proxy(self, network):
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pm = external_process.ProcessManager(
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self.conf,
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network.id,
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self.root_helper,
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self._ns_name(network))
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pm.disable()
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class DhcpPluginApi(proxy.RpcProxy):
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"""Agent side of the dhcp rpc API.
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API version history:
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1.0 - Initial version.
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1.1 - Added get_active_networks_info, create_dhcp_port,
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and update_dhcp_port methods.
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"""
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BASE_RPC_API_VERSION = '1.1'
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def __init__(self, topic, context):
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super(DhcpPluginApi, self).__init__(
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topic=topic, default_version=self.BASE_RPC_API_VERSION)
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self.context = context
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self.host = cfg.CONF.host
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def get_active_networks_info(self):
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"""Make a remote process call to retrieve all network info."""
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networks = self.call(self.context,
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self.make_msg('get_active_networks_info',
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host=self.host),
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topic=self.topic)
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return [DictModel(n) for n in networks]
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def get_network_info(self, network_id):
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"""Make a remote process call to retrieve network info."""
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return DictModel(self.call(self.context,
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self.make_msg('get_network_info',
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network_id=network_id,
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host=self.host),
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topic=self.topic))
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def get_dhcp_port(self, network_id, device_id):
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"""Make a remote process call to get the dhcp port."""
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return DictModel(self.call(self.context,
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self.make_msg('get_dhcp_port',
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network_id=network_id,
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device_id=device_id,
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host=self.host),
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topic=self.topic))
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def create_dhcp_port(self, port):
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"""Make a remote process call to create the dhcp port."""
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return DictModel(self.call(self.context,
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self.make_msg('create_dhcp_port',
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port=port,
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host=self.host),
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topic=self.topic))
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def update_dhcp_port(self, port_id, port):
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"""Make a remote process call to update the dhcp port."""
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return DictModel(self.call(self.context,
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self.make_msg('update_dhcp_port',
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port_id=port_id,
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port=port,
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host=self.host),
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topic=self.topic))
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def release_dhcp_port(self, network_id, device_id):
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"""Make a remote process call to release the dhcp port."""
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return self.call(self.context,
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self.make_msg('release_dhcp_port',
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network_id=network_id,
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device_id=device_id,
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host=self.host),
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topic=self.topic)
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def release_port_fixed_ip(self, network_id, device_id, subnet_id):
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"""Make a remote process call to release a fixed_ip on the port."""
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return self.call(self.context,
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self.make_msg('release_port_fixed_ip',
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network_id=network_id,
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subnet_id=subnet_id,
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device_id=device_id,
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host=self.host),
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topic=self.topic)
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class NetworkCache(object):
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"""Agent cache of the current network state."""
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def __init__(self):
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self.cache = {}
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self.subnet_lookup = {}
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self.port_lookup = {}
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def get_network_ids(self):
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return self.cache.keys()
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def get_network_by_id(self, network_id):
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return self.cache.get(network_id)
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def get_network_by_subnet_id(self, subnet_id):
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return self.cache.get(self.subnet_lookup.get(subnet_id))
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def get_network_by_port_id(self, port_id):
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return self.cache.get(self.port_lookup.get(port_id))
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def put(self, network):
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if network.id in self.cache:
|
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self.remove(self.cache[network.id])
|
|
|
|
self.cache[network.id] = network
|
|
|
|
for subnet in network.subnets:
|
|
self.subnet_lookup[subnet.id] = network.id
|
|
|
|
for port in network.ports:
|
|
self.port_lookup[port.id] = network.id
|
|
|
|
def remove(self, network):
|
|
del self.cache[network.id]
|
|
|
|
for subnet in network.subnets:
|
|
del self.subnet_lookup[subnet.id]
|
|
|
|
for port in network.ports:
|
|
del self.port_lookup[port.id]
|
|
|
|
def put_port(self, port):
|
|
network = self.get_network_by_id(port.network_id)
|
|
for index in range(len(network.ports)):
|
|
if network.ports[index].id == port.id:
|
|
network.ports[index] = port
|
|
break
|
|
else:
|
|
network.ports.append(port)
|
|
|
|
self.port_lookup[port.id] = network.id
|
|
|
|
def remove_port(self, port):
|
|
network = self.get_network_by_port_id(port.id)
|
|
|
|
for index in range(len(network.ports)):
|
|
if network.ports[index] == port:
|
|
del network.ports[index]
|
|
del self.port_lookup[port.id]
|
|
break
|
|
|
|
def get_port_by_id(self, port_id):
|
|
network = self.get_network_by_port_id(port_id)
|
|
if network:
|
|
for port in network.ports:
|
|
if port.id == port_id:
|
|
return port
|
|
|
|
def get_state(self):
|
|
net_ids = self.get_network_ids()
|
|
num_nets = len(net_ids)
|
|
num_subnets = 0
|
|
num_ports = 0
|
|
for net_id in net_ids:
|
|
network = self.get_network_by_id(net_id)
|
|
num_subnets += len(network.subnets)
|
|
num_ports += len(network.ports)
|
|
return {'networks': num_nets,
|
|
'subnets': num_subnets,
|
|
'ports': num_ports}
|
|
|
|
|
|
class DeviceManager(object):
|
|
OPTS = [
|
|
cfg.StrOpt('interface_driver',
|
|
help=_("The driver used to manage the virtual interface."))
|
|
]
|
|
|
|
def __init__(self, conf, plugin):
|
|
self.conf = conf
|
|
self.root_helper = config.get_root_helper(conf)
|
|
self.plugin = plugin
|
|
if not conf.interface_driver:
|
|
raise SystemExit(_('You must specify an interface driver'))
|
|
try:
|
|
self.driver = importutils.import_object(
|
|
conf.interface_driver, conf
|
|
)
|
|
except Exception:
|
|
msg = _("Error importing interface driver "
|
|
"'%s'") % conf.interface_driver
|
|
raise SystemExit(msg)
|
|
|
|
def get_interface_name(self, network, port):
|
|
"""Return interface(device) name for use by the DHCP process."""
|
|
return self.driver.get_device_name(port)
|
|
|
|
def get_device_id(self, network):
|
|
"""Return a unique DHCP device ID for this host on the network."""
|
|
# There could be more than one dhcp server per network, so create
|
|
# a device id that combines host and network ids
|
|
|
|
host_uuid = uuid.uuid5(uuid.NAMESPACE_DNS, socket.gethostname())
|
|
return 'dhcp%s-%s' % (host_uuid, network.id)
|
|
|
|
def _get_device(self, network):
|
|
"""Return DHCP ip_lib device for this host on the network."""
|
|
device_id = self.get_device_id(network)
|
|
port = self.plugin.get_dhcp_port(network.id, device_id)
|
|
interface_name = self.get_interface_name(network, port)
|
|
namespace = NS_PREFIX + network.id
|
|
return ip_lib.IPDevice(interface_name,
|
|
self.root_helper,
|
|
namespace)
|
|
|
|
def _set_default_route(self, network):
|
|
"""Sets the default gateway for this dhcp namespace.
|
|
|
|
This method is idempotent and will only adjust the route if adjusting
|
|
it would change it from what it already is. This makes it safe to call
|
|
and avoids unnecessary perturbation of the system.
|
|
"""
|
|
device = self._get_device(network)
|
|
gateway = device.route.get_gateway()
|
|
if gateway:
|
|
gateway = gateway['gateway']
|
|
|
|
for subnet in network.subnets:
|
|
skip_subnet = (
|
|
subnet.ip_version != 4
|
|
or not subnet.enable_dhcp
|
|
or subnet.gateway_ip is None)
|
|
|
|
if skip_subnet:
|
|
continue
|
|
|
|
if gateway != subnet.gateway_ip:
|
|
m = _('Setting gateway for dhcp netns on net %(n)s to %(ip)s')
|
|
LOG.debug(m, {'n': network.id, 'ip': subnet.gateway_ip})
|
|
|
|
device.route.add_gateway(subnet.gateway_ip)
|
|
|
|
return
|
|
|
|
# No subnets on the network have a valid gateway. Clean it up to avoid
|
|
# confusion from seeing an invalid gateway here.
|
|
if gateway is not None:
|
|
msg = _('Removing gateway for dhcp netns on net %s')
|
|
LOG.debug(msg, network.id)
|
|
|
|
device.route.delete_gateway(gateway)
|
|
|
|
def setup_dhcp_port(self, network):
|
|
"""Create/update DHCP port for the host if needed and return port."""
|
|
|
|
device_id = self.get_device_id(network)
|
|
subnets = {}
|
|
dhcp_enabled_subnet_ids = []
|
|
for subnet in network.subnets:
|
|
if subnet.enable_dhcp:
|
|
dhcp_enabled_subnet_ids.append(subnet.id)
|
|
subnets[subnet.id] = subnet
|
|
|
|
dhcp_port = None
|
|
for port in network.ports:
|
|
port_device_id = getattr(port, 'device_id', None)
|
|
if port_device_id == device_id:
|
|
port_fixed_ips = []
|
|
for fixed_ip in port.fixed_ips:
|
|
port_fixed_ips.append({'subnet_id': fixed_ip.subnet_id,
|
|
'ip_address': fixed_ip.ip_address})
|
|
if fixed_ip.subnet_id in dhcp_enabled_subnet_ids:
|
|
dhcp_enabled_subnet_ids.remove(fixed_ip.subnet_id)
|
|
|
|
# If there are dhcp_enabled_subnet_ids here that means that
|
|
# we need to add those to the port and call update.
|
|
if dhcp_enabled_subnet_ids:
|
|
port_fixed_ips.extend(
|
|
[dict(subnet_id=s) for s in dhcp_enabled_subnet_ids])
|
|
dhcp_port = self.plugin.update_dhcp_port(
|
|
port.id, {'port': {'fixed_ips': port_fixed_ips}})
|
|
else:
|
|
dhcp_port = port
|
|
# break since we found port that matches device_id
|
|
break
|
|
|
|
# DHCP port has not yet been created.
|
|
if dhcp_port is None:
|
|
LOG.debug(_('DHCP port %(device_id)s on network %(network_id)s'
|
|
' does not yet exist.'), {'device_id': device_id,
|
|
'network_id': network.id})
|
|
port_dict = dict(
|
|
name='',
|
|
admin_state_up=True,
|
|
device_id=device_id,
|
|
network_id=network.id,
|
|
tenant_id=network.tenant_id,
|
|
fixed_ips=[dict(subnet_id=s) for s in dhcp_enabled_subnet_ids])
|
|
dhcp_port = self.plugin.create_dhcp_port({'port': port_dict})
|
|
|
|
# Convert subnet_id to subnet dict
|
|
fixed_ips = [dict(subnet_id=fixed_ip.subnet_id,
|
|
ip_address=fixed_ip.ip_address,
|
|
subnet=subnets[fixed_ip.subnet_id])
|
|
for fixed_ip in dhcp_port.fixed_ips]
|
|
|
|
ips = [DictModel(item) if isinstance(item, dict) else item
|
|
for item in fixed_ips]
|
|
dhcp_port.fixed_ips = ips
|
|
|
|
return dhcp_port
|
|
|
|
def setup(self, network, reuse_existing=False):
|
|
"""Create and initialize a device for network's DHCP on this host."""
|
|
port = self.setup_dhcp_port(network)
|
|
interface_name = self.get_interface_name(network, port)
|
|
|
|
if self.conf.use_namespaces:
|
|
namespace = NS_PREFIX + network.id
|
|
else:
|
|
namespace = None
|
|
|
|
if ip_lib.device_exists(interface_name,
|
|
self.root_helper,
|
|
namespace):
|
|
if not reuse_existing:
|
|
raise exceptions.PreexistingDeviceFailure(
|
|
dev_name=interface_name)
|
|
|
|
LOG.debug(_('Reusing existing device: %s.'), interface_name)
|
|
else:
|
|
self.driver.plug(network.id,
|
|
port.id,
|
|
interface_name,
|
|
port.mac_address,
|
|
namespace=namespace)
|
|
ip_cidrs = []
|
|
for fixed_ip in port.fixed_ips:
|
|
subnet = fixed_ip.subnet
|
|
net = netaddr.IPNetwork(subnet.cidr)
|
|
ip_cidr = '%s/%s' % (fixed_ip.ip_address, net.prefixlen)
|
|
ip_cidrs.append(ip_cidr)
|
|
|
|
if (self.conf.enable_isolated_metadata and
|
|
self.conf.use_namespaces):
|
|
ip_cidrs.append(METADATA_DEFAULT_IP)
|
|
|
|
self.driver.init_l3(interface_name, ip_cidrs,
|
|
namespace=namespace)
|
|
|
|
# ensure that the dhcp interface is first in the list
|
|
if namespace is None:
|
|
device = ip_lib.IPDevice(interface_name,
|
|
self.root_helper)
|
|
device.route.pullup_route(interface_name)
|
|
|
|
if self.conf.use_namespaces:
|
|
self._set_default_route(network)
|
|
|
|
return interface_name
|
|
|
|
def update(self, network):
|
|
"""Update device settings for the network's DHCP on this host."""
|
|
if self.conf.use_namespaces:
|
|
self._set_default_route(network)
|
|
|
|
def destroy(self, network, device_name):
|
|
"""Destroy the device used for the network's DHCP on this host."""
|
|
if self.conf.use_namespaces:
|
|
namespace = NS_PREFIX + network.id
|
|
else:
|
|
namespace = None
|
|
|
|
self.driver.unplug(device_name, namespace=namespace)
|
|
|
|
self.plugin.release_dhcp_port(network.id,
|
|
self.get_device_id(network))
|
|
|
|
|
|
class DictModel(object):
|
|
"""Convert dict into an object that provides attribute access to values."""
|
|
def __init__(self, d):
|
|
for key, value in d.iteritems():
|
|
if isinstance(value, list):
|
|
value = [DictModel(item) if isinstance(item, dict) else item
|
|
for item in value]
|
|
elif isinstance(value, dict):
|
|
value = DictModel(value)
|
|
|
|
setattr(self, key, value)
|
|
|
|
|
|
class DhcpAgentWithStateReport(DhcpAgent):
|
|
def __init__(self, host=None):
|
|
super(DhcpAgentWithStateReport, self).__init__(host=host)
|
|
self.state_rpc = agent_rpc.PluginReportStateAPI(topics.PLUGIN)
|
|
self.agent_state = {
|
|
'binary': 'neutron-dhcp-agent',
|
|
'host': host,
|
|
'topic': topics.DHCP_AGENT,
|
|
'configurations': {
|
|
'dhcp_driver': cfg.CONF.dhcp_driver,
|
|
'use_namespaces': cfg.CONF.use_namespaces,
|
|
'dhcp_lease_duration': cfg.CONF.dhcp_lease_duration},
|
|
'start_flag': True,
|
|
'agent_type': constants.AGENT_TYPE_DHCP}
|
|
report_interval = cfg.CONF.AGENT.report_interval
|
|
self.use_call = True
|
|
if report_interval:
|
|
self.heartbeat = loopingcall.FixedIntervalLoopingCall(
|
|
self._report_state)
|
|
self.heartbeat.start(interval=report_interval)
|
|
|
|
def _report_state(self):
|
|
try:
|
|
self.agent_state.get('configurations').update(
|
|
self.cache.get_state())
|
|
ctx = context.get_admin_context_without_session()
|
|
self.state_rpc.report_state(ctx, self.agent_state, self.use_call)
|
|
self.use_call = False
|
|
except AttributeError:
|
|
# This means the server does not support report_state
|
|
LOG.warn(_("Neutron server does not support state report."
|
|
" State report for this agent will be disabled."))
|
|
self.heartbeat.stop()
|
|
self.run()
|
|
return
|
|
except Exception:
|
|
LOG.exception(_("Failed reporting state!"))
|
|
return
|
|
if self.agent_state.pop('start_flag', None):
|
|
self.run()
|
|
|
|
def agent_updated(self, context, payload):
|
|
"""Handle the agent_updated notification event."""
|
|
self.needs_resync = True
|
|
LOG.info(_("agent_updated by server side %s!"), payload)
|
|
|
|
def after_start(self):
|
|
LOG.info(_("DHCP agent started"))
|
|
|
|
|
|
def register_options():
|
|
cfg.CONF.register_opts(DhcpAgent.OPTS)
|
|
config.register_agent_state_opts_helper(cfg.CONF)
|
|
config.register_root_helper(cfg.CONF)
|
|
cfg.CONF.register_opts(DeviceManager.OPTS)
|
|
cfg.CONF.register_opts(dhcp.OPTS)
|
|
cfg.CONF.register_opts(interface.OPTS)
|
|
|
|
|
|
def main():
|
|
eventlet.monkey_patch()
|
|
register_options()
|
|
cfg.CONF(project='neutron')
|
|
config.setup_logging(cfg.CONF)
|
|
legacy.modernize_quantum_config(cfg.CONF)
|
|
server = neutron_service.Service.create(
|
|
binary='neutron-dhcp-agent',
|
|
topic=topics.DHCP_AGENT,
|
|
report_interval=cfg.CONF.AGENT.report_interval,
|
|
manager='neutron.agent.dhcp_agent.DhcpAgentWithStateReport')
|
|
service.launch(server).wait()
|