294 lines
12 KiB
Python
294 lines
12 KiB
Python
# Copyright (c) 2012 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 oslo.config import cfg
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from oslo.db import exception as db_exc
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from oslo import messaging
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from oslo.utils import excutils
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from neutron.api.v2 import attributes
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from neutron.common import constants
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from neutron.common import exceptions as n_exc
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from neutron.common import utils
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from neutron.extensions import portbindings
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from neutron.i18n import _LW
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from neutron import manager
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from neutron.openstack.common import log as logging
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LOG = logging.getLogger(__name__)
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class DhcpRpcCallback(object):
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"""DHCP agent RPC callback in plugin implementations."""
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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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target = messaging.Target(version='1.1')
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def _get_active_networks(self, context, **kwargs):
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"""Retrieve and return a list of the active networks."""
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host = kwargs.get('host')
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plugin = manager.NeutronManager.get_plugin()
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if utils.is_extension_supported(
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plugin, constants.DHCP_AGENT_SCHEDULER_EXT_ALIAS):
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if cfg.CONF.network_auto_schedule:
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plugin.auto_schedule_networks(context, host)
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nets = plugin.list_active_networks_on_active_dhcp_agent(
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context, host)
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else:
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filters = dict(admin_state_up=[True])
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nets = plugin.get_networks(context, filters=filters)
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return nets
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def _port_action(self, plugin, context, port, action):
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"""Perform port operations taking care of concurrency issues."""
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try:
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if action == 'create_port':
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return plugin.create_port(context, port)
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elif action == 'update_port':
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return plugin.update_port(context, port['id'], port)
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else:
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msg = _('Unrecognized action')
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raise n_exc.Invalid(message=msg)
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except (db_exc.DBError, n_exc.NetworkNotFound,
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n_exc.SubnetNotFound, n_exc.IpAddressGenerationFailure) as e:
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with excutils.save_and_reraise_exception(reraise=False) as ctxt:
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if isinstance(e, n_exc.IpAddressGenerationFailure):
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# Check if the subnet still exists and if it does not,
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# this is the reason why the ip address generation failed.
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# In any other unlikely event re-raise
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try:
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subnet_id = port['port']['fixed_ips'][0]['subnet_id']
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plugin.get_subnet(context, subnet_id)
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except n_exc.SubnetNotFound:
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pass
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else:
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ctxt.reraise = True
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net_id = port['port']['network_id']
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LOG.warn(_LW("Action %(action)s for network %(net_id)s "
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"could not complete successfully: %(reason)s"),
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{"action": action, "net_id": net_id, 'reason': e})
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def get_active_networks(self, context, **kwargs):
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"""Retrieve and return a list of the active network ids."""
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# NOTE(arosen): This method is no longer used by the DHCP agent but is
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# left so that neutron-dhcp-agents will still continue to work if
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# neutron-server is upgraded and not the agent.
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host = kwargs.get('host')
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LOG.debug('get_active_networks requested from %s', host)
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nets = self._get_active_networks(context, **kwargs)
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return [net['id'] for net in nets]
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def get_active_networks_info(self, context, **kwargs):
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"""Returns all the networks/subnets/ports in system."""
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host = kwargs.get('host')
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LOG.debug('get_active_networks_info from %s', host)
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networks = self._get_active_networks(context, **kwargs)
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plugin = manager.NeutronManager.get_plugin()
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filters = {'network_id': [network['id'] for network in networks]}
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ports = plugin.get_ports(context, filters=filters)
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filters['enable_dhcp'] = [True]
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subnets = plugin.get_subnets(context, filters=filters)
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for network in networks:
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network['subnets'] = [subnet for subnet in subnets
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if subnet['network_id'] == network['id']]
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network['ports'] = [port for port in ports
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if port['network_id'] == network['id']]
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return networks
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def get_network_info(self, context, **kwargs):
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"""Retrieve and return a extended information about a network."""
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network_id = kwargs.get('network_id')
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host = kwargs.get('host')
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LOG.debug('Network %(network_id)s requested from '
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'%(host)s', {'network_id': network_id,
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'host': host})
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plugin = manager.NeutronManager.get_plugin()
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try:
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network = plugin.get_network(context, network_id)
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except n_exc.NetworkNotFound:
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LOG.warn(_LW("Network %s could not be found, it might have "
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"been deleted concurrently."), network_id)
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return
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filters = dict(network_id=[network_id])
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network['subnets'] = plugin.get_subnets(context, filters=filters)
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network['ports'] = plugin.get_ports(context, filters=filters)
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return network
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def get_dhcp_port(self, context, **kwargs):
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"""Allocate a DHCP port for the host and return port information.
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This method will re-use an existing port if one already exists. When a
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port is re-used, the fixed_ip allocation will be updated to the current
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network state. If an expected failure occurs, a None port is returned.
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"""
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host = kwargs.get('host')
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network_id = kwargs.get('network_id')
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device_id = kwargs.get('device_id')
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# There could be more than one dhcp server per network, so create
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# a device id that combines host and network ids
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LOG.debug('Port %(device_id)s for %(network_id)s requested from '
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'%(host)s', {'device_id': device_id,
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'network_id': network_id,
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'host': host})
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plugin = manager.NeutronManager.get_plugin()
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retval = None
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filters = dict(network_id=[network_id])
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subnets = dict([(s['id'], s) for s in
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plugin.get_subnets(context, filters=filters)])
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dhcp_enabled_subnet_ids = [s['id'] for s in
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subnets.values() if s['enable_dhcp']]
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try:
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filters = dict(network_id=[network_id], device_id=[device_id])
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ports = plugin.get_ports(context, filters=filters)
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if ports:
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# Ensure that fixed_ips cover all dhcp_enabled subnets.
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port = ports[0]
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for fixed_ip in port['fixed_ips']:
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if fixed_ip['subnet_id'] in dhcp_enabled_subnet_ids:
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dhcp_enabled_subnet_ids.remove(fixed_ip['subnet_id'])
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port['fixed_ips'].extend(
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[dict(subnet_id=s) for s in dhcp_enabled_subnet_ids])
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retval = plugin.update_port(context, port['id'],
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dict(port=port))
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except n_exc.NotFound as e:
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LOG.warning(e)
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if retval is None:
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# No previous port exists, so create a new one.
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LOG.debug('DHCP port %(device_id)s on network %(network_id)s '
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'does not exist on %(host)s',
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{'device_id': device_id,
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'network_id': network_id,
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'host': host})
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try:
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network = plugin.get_network(context, network_id)
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except n_exc.NetworkNotFound:
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LOG.warn(_LW("Network %s could not be found, it might have "
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"been deleted concurrently."), network_id)
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return
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port_dict = dict(
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admin_state_up=True,
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device_id=device_id,
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network_id=network_id,
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tenant_id=network['tenant_id'],
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mac_address=attributes.ATTR_NOT_SPECIFIED,
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name='',
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device_owner=constants.DEVICE_OWNER_DHCP,
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fixed_ips=[dict(subnet_id=s) for s in dhcp_enabled_subnet_ids])
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retval = self._port_action(plugin, context, {'port': port_dict},
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'create_port')
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if not retval:
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return
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# Convert subnet_id to subnet dict
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for fixed_ip in retval['fixed_ips']:
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subnet_id = fixed_ip.pop('subnet_id')
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fixed_ip['subnet'] = subnets[subnet_id]
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return retval
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def release_dhcp_port(self, context, **kwargs):
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"""Release the port currently being used by a DHCP agent."""
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host = kwargs.get('host')
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network_id = kwargs.get('network_id')
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device_id = kwargs.get('device_id')
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LOG.debug('DHCP port deletion for %(network_id)s request from '
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'%(host)s',
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{'network_id': network_id, 'host': host})
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plugin = manager.NeutronManager.get_plugin()
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plugin.delete_ports_by_device_id(context, device_id, network_id)
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def release_port_fixed_ip(self, context, **kwargs):
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"""Release the fixed_ip associated the subnet on a port."""
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host = kwargs.get('host')
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network_id = kwargs.get('network_id')
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device_id = kwargs.get('device_id')
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subnet_id = kwargs.get('subnet_id')
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LOG.debug('DHCP port remove fixed_ip for %(subnet_id)s request '
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'from %(host)s',
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{'subnet_id': subnet_id, 'host': host})
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plugin = manager.NeutronManager.get_plugin()
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filters = dict(network_id=[network_id], device_id=[device_id])
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ports = plugin.get_ports(context, filters=filters)
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if ports:
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port = ports[0]
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fixed_ips = port.get('fixed_ips', [])
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for i in range(len(fixed_ips)):
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if fixed_ips[i]['subnet_id'] == subnet_id:
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del fixed_ips[i]
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break
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plugin.update_port(context, port['id'], dict(port=port))
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def update_lease_expiration(self, context, **kwargs):
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"""Release the fixed_ip associated the subnet on a port."""
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# NOTE(arosen): This method is no longer used by the DHCP agent but is
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# left so that neutron-dhcp-agents will still continue to work if
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# neutron-server is upgraded and not the agent.
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host = kwargs.get('host')
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LOG.warning(_LW('Updating lease expiration is now deprecated. Issued '
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'from host %s.'), host)
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def create_dhcp_port(self, context, **kwargs):
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"""Create and return dhcp port information.
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If an expected failure occurs, a None port is returned.
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"""
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host = kwargs.get('host')
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port = kwargs.get('port')
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LOG.debug('Create dhcp port %(port)s '
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'from %(host)s.',
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{'port': port,
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'host': host})
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port['port']['device_owner'] = constants.DEVICE_OWNER_DHCP
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port['port'][portbindings.HOST_ID] = host
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if 'mac_address' not in port['port']:
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port['port']['mac_address'] = attributes.ATTR_NOT_SPECIFIED
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plugin = manager.NeutronManager.get_plugin()
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return self._port_action(plugin, context, port, 'create_port')
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def update_dhcp_port(self, context, **kwargs):
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"""Update the dhcp port."""
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host = kwargs.get('host')
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port = kwargs.get('port')
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port['id'] = kwargs.get('port_id')
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LOG.debug('Update dhcp port %(port)s '
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'from %(host)s.',
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{'port': port,
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'host': host})
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plugin = manager.NeutronManager.get_plugin()
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return self._port_action(plugin, context, port, 'update_port')
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