310 lines
14 KiB
Python
310 lines
14 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 neutron_lib import constants
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from neutron_lib import exceptions
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from oslo_config import cfg
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from oslo_log import log as logging
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import oslo_messaging
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from oslo_serialization import jsonutils
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import six
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from neutron.common import constants as n_const
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from neutron.common import utils
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from neutron import context as neutron_context
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from neutron.db import api as db_api
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from neutron.extensions import l3
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from neutron.extensions import portbindings
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from neutron import manager
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from neutron.plugins.common import constants as plugin_constants
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LOG = logging.getLogger(__name__)
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class L3RpcCallback(object):
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"""L3 agent RPC callback in plugin implementations."""
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# 1.0 L3PluginApi BASE_RPC_API_VERSION
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# 1.1 Support update_floatingip_statuses
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# 1.2 Added methods for DVR support
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# 1.3 Added a method that returns the list of activated services
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# 1.4 Added L3 HA update_router_state. This method was later removed,
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# since it was unused. The RPC version was not changed
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# 1.5 Added update_ha_routers_states
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# 1.6 Added process_prefix_update to support IPv6 Prefix Delegation
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# 1.7 Added method delete_agent_gateway_port for DVR Routers
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# 1.8 Added address scope information
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# 1.9 Added get_router_ids
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target = oslo_messaging.Target(version='1.9')
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@property
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def plugin(self):
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if not hasattr(self, '_plugin'):
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self._plugin = manager.NeutronManager.get_plugin()
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return self._plugin
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@property
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def l3plugin(self):
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if not hasattr(self, '_l3plugin'):
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self._l3plugin = manager.NeutronManager.get_service_plugins()[
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plugin_constants.L3_ROUTER_NAT]
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return self._l3plugin
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def get_router_ids(self, context, host):
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"""Returns IDs of routers scheduled to l3 agent on <host>
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This will autoschedule unhosted routers to l3 agent on <host> and then
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return all ids of routers scheduled to it.
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"""
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if utils.is_extension_supported(
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self.l3plugin, constants.L3_AGENT_SCHEDULER_EXT_ALIAS):
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if cfg.CONF.router_auto_schedule:
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self.l3plugin.auto_schedule_routers(context, host,
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router_ids=None)
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return self.l3plugin.list_router_ids_on_host(context, host)
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@db_api.retry_db_errors
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def sync_routers(self, context, **kwargs):
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"""Sync routers according to filters to a specific agent.
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@param context: contain user information
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@param kwargs: host, router_ids
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@return: a list of routers
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with their interfaces and floating_ips
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"""
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router_ids = kwargs.get('router_ids')
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host = kwargs.get('host')
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context = neutron_context.get_admin_context()
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if utils.is_extension_supported(
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self.l3plugin, constants.L3_AGENT_SCHEDULER_EXT_ALIAS):
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# only auto schedule routers that were specifically requested;
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# on agent full sync routers will be auto scheduled in
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# get_router_ids()
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if cfg.CONF.router_auto_schedule and router_ids:
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self.l3plugin.auto_schedule_routers(context, host, router_ids)
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routers = (
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self.l3plugin.list_active_sync_routers_on_active_l3_agent(
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context, host, router_ids))
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else:
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routers = self.l3plugin.get_sync_data(context, router_ids)
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if utils.is_extension_supported(
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self.plugin, constants.PORT_BINDING_EXT_ALIAS):
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self._ensure_host_set_on_ports(context, host, routers)
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LOG.debug("Routers returned to l3 agent:\n %s",
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utils.DelayedStringRenderer(jsonutils.dumps,
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routers, indent=5))
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return routers
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def _ensure_host_set_on_ports(self, context, host, routers):
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for router in routers:
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LOG.debug("Checking router: %(id)s for host: %(host)s",
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{'id': router['id'], 'host': host})
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if router.get('gw_port') and router.get('distributed'):
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# '' is used to effectively clear binding of a gw port if not
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# bound (snat is not hosted on any l3 agent)
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gw_port_host = router.get('gw_port_host') or ''
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self._ensure_host_set_on_port(context,
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gw_port_host,
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router.get('gw_port'),
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router['id'])
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for p in router.get(n_const.SNAT_ROUTER_INTF_KEY, []):
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self._ensure_host_set_on_port(context,
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gw_port_host,
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p, router['id'])
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else:
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self._ensure_host_set_on_port(
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context, host,
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router.get('gw_port'),
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router['id'],
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ha_router_port=router.get('ha'))
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for interface in router.get(constants.INTERFACE_KEY, []):
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self._ensure_host_set_on_port(
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context,
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host,
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interface,
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router['id'],
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ha_router_port=router.get('ha'))
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interface = router.get(constants.HA_INTERFACE_KEY)
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if interface:
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self._ensure_host_set_on_port(context, host, interface,
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router['id'])
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def _ensure_host_set_on_port(self, context, host, port, router_id=None,
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ha_router_port=False):
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if (port and host is not None and
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(port.get('device_owner') !=
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constants.DEVICE_OWNER_DVR_INTERFACE and
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port.get(portbindings.HOST_ID) != host or
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port.get(portbindings.VIF_TYPE) ==
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portbindings.VIF_TYPE_BINDING_FAILED)):
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# Ports owned by non-HA routers are bound again if they're
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# already bound but the router moved to another host.
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if not ha_router_port:
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# All ports, including ports created for SNAT'ing for
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# DVR are handled here
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try:
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self.plugin.update_port(
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context,
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port['id'],
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{'port': {portbindings.HOST_ID: host}})
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# updating port's host to pass actual info to l3 agent
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port[portbindings.HOST_ID] = host
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except exceptions.PortNotFound:
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LOG.debug("Port %(port)s not found while updating "
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"agent binding for router %(router)s.",
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{"port": port['id'], "router": router_id})
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# Ports owned by HA routers should only be bound once, if
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# they are unbound. These ports are moved when an agent reports
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# that one of its routers moved to the active state.
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else:
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if not port.get(portbindings.HOST_ID):
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active_host = (
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self.l3plugin.get_active_host_for_ha_router(
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context, router_id))
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if active_host:
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host = active_host
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# If there is currently no active router instance (For
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# example it's a new router), the host that requested
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# the routers (Essentially a random host) will do. The
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# port binding will be corrected when an active is
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# elected.
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try:
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self.plugin.update_port(
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context,
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port['id'],
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{'port': {portbindings.HOST_ID: host}})
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except exceptions.PortNotFound:
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LOG.debug("Port %(port)s not found while updating "
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"agent binding for router %(router)s.",
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{"port": port['id'], "router": router_id})
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elif (port and
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port.get('device_owner') ==
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constants.DEVICE_OWNER_DVR_INTERFACE):
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# Ports that are DVR interfaces have multiple bindings (based on
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# of hosts on which DVR router interfaces are spawned). Such
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# bindings are created/updated here by invoking
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# update_dvr_port_binding
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self.plugin.update_dvr_port_binding(context, port['id'],
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{'port':
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{portbindings.HOST_ID: host,
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'device_id': router_id}
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})
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def get_external_network_id(self, context, **kwargs):
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"""Get one external network id for l3 agent.
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l3 agent expects only one external network when it performs
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this query.
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"""
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context = neutron_context.get_admin_context()
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net_id = self.plugin.get_external_network_id(context)
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LOG.debug("External network ID returned to l3 agent: %s",
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net_id)
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return net_id
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def get_service_plugin_list(self, context, **kwargs):
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plugins = manager.NeutronManager.get_service_plugins()
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return plugins.keys()
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@db_api.retry_db_errors
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def update_floatingip_statuses(self, context, router_id, fip_statuses):
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"""Update operational status for a floating IP."""
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with context.session.begin(subtransactions=True):
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for (floatingip_id, status) in six.iteritems(fip_statuses):
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LOG.debug("New status for floating IP %(floatingip_id)s: "
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"%(status)s", {'floatingip_id': floatingip_id,
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'status': status})
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try:
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self.l3plugin.update_floatingip_status(context,
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floatingip_id,
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status)
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except l3.FloatingIPNotFound:
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LOG.debug("Floating IP: %s no longer present.",
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floatingip_id)
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# Find all floating IPs known to have been the given router
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# for which an update was not received. Set them DOWN mercilessly
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# This situation might occur for some asynchronous backends if
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# notifications were missed
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known_router_fips = self.l3plugin.get_floatingips(
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context, {'last_known_router_id': [router_id]})
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# Consider only floating ips which were disassociated in the API
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# FIXME(salv-orlando): Filtering in code should be avoided.
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# the plugin should offer a way to specify a null filter
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fips_to_disable = (fip['id'] for fip in known_router_fips
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if not fip['router_id'])
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for fip_id in fips_to_disable:
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self.l3plugin.update_floatingip_status(
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context, fip_id, constants.FLOATINGIP_STATUS_DOWN)
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def get_ports_by_subnet(self, context, **kwargs):
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"""DVR: RPC called by dvr-agent to get all ports for subnet."""
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subnet_id = kwargs.get('subnet_id')
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LOG.debug("DVR: subnet_id: %s", subnet_id)
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filters = {'fixed_ips': {'subnet_id': [subnet_id]}}
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return self.plugin.get_ports(context, filters=filters)
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@db_api.retry_db_errors
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def get_agent_gateway_port(self, context, **kwargs):
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"""Get Agent Gateway port for FIP.
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l3 agent expects an Agent Gateway Port to be returned
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for this query.
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"""
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network_id = kwargs.get('network_id')
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host = kwargs.get('host')
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admin_ctx = neutron_context.get_admin_context()
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agent_port = self.l3plugin.create_fip_agent_gw_port_if_not_exists(
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admin_ctx, network_id, host)
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self._ensure_host_set_on_port(admin_ctx, host, agent_port)
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LOG.debug('Agent Gateway port returned : %(agent_port)s with '
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'host %(host)s', {'agent_port': agent_port,
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'host': host})
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return agent_port
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@db_api.retry_db_errors
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def update_ha_routers_states(self, context, **kwargs):
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"""Update states for HA routers.
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Get a map of router_id to its HA state on a host and update the DB.
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State must be in: ('active', 'standby').
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"""
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states = kwargs.get('states')
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host = kwargs.get('host')
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LOG.debug('Updating HA routers states on host %s: %s', host, states)
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self.l3plugin.update_routers_states(context, states, host)
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def process_prefix_update(self, context, **kwargs):
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subnets = kwargs.get('subnets')
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updated_subnets = []
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for subnet_id, prefix in subnets.items():
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updated_subnets.append(self.plugin.update_subnet(
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context,
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subnet_id,
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{'subnet': {'cidr': prefix}}))
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return updated_subnets
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@db_api.retry_db_errors
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def delete_agent_gateway_port(self, context, **kwargs):
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"""Delete Floatingip agent gateway port."""
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network_id = kwargs.get('network_id')
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host = kwargs.get('host')
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admin_ctx = neutron_context.get_admin_context()
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self.l3plugin.delete_floatingip_agent_gateway_port(
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admin_ctx, host, network_id)
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