580b47e54f
RPC has a version of itself. In Neutron a plugin implements several RPC interface, so a single RPC version doesn't work. In Mixin callback class approach, RPC versioning depends on each plugin implementation and it makes harder to maintain RPC version appropriately. This patch series replaces mixin RPC callback of server side with a separate class. This commit handles server-side callback of dhcp-agent RPC interface. DHCP-agent server-side callback class is moved from db/ to api/rpc/handlers because it doesn't involve any db operations and defining all RPC interfaces in a single place sounds reasonable. Note that moving other DHCP-agent related RPC interface class to api/rpc/handlers can be done in a separate patch as this patch focuses on reorganizing the server-side RPC callback class. Partial-Bug: #1359416 Change-Id: Ifb2a1bc0b7971995aae2856c9d4cd88c6dbc22d6
165 lines
7.3 KiB
Python
165 lines
7.3 KiB
Python
# Copyright 2013 VMware, Inc.
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#
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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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#
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from oslo.config import cfg
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from neutron.api.rpc.agentnotifiers import dhcp_rpc_agent_api
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from neutron.api.rpc.handlers import dhcp_rpc
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from neutron.common import constants as const
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from neutron.common import rpc as n_rpc
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from neutron.common import topics
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from neutron.db import agents_db
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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.plugins.vmware.common import config
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from neutron.plugins.vmware.common import exceptions as nsx_exc
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from neutron.plugins.vmware.dhcp_meta import combined
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from neutron.plugins.vmware.dhcp_meta import lsnmanager
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from neutron.plugins.vmware.dhcp_meta import migration
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from neutron.plugins.vmware.dhcp_meta import nsx as nsx_svc
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from neutron.plugins.vmware.dhcp_meta import rpc as nsx_rpc
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from neutron.plugins.vmware.extensions import lsn
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LOG = logging.getLogger(__name__)
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class DhcpMetadataAccess(object):
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def setup_dhcpmeta_access(self):
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"""Initialize support for DHCP and Metadata services."""
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self._init_extensions()
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if cfg.CONF.NSX.agent_mode == config.AgentModes.AGENT:
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self._setup_rpc_dhcp_metadata()
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mod = nsx_rpc
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elif cfg.CONF.NSX.agent_mode == config.AgentModes.AGENTLESS:
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self._setup_nsx_dhcp_metadata()
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mod = nsx_svc
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elif cfg.CONF.NSX.agent_mode == config.AgentModes.COMBINED:
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notifier = self._setup_nsx_dhcp_metadata()
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self._setup_rpc_dhcp_metadata(notifier=notifier)
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mod = combined
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else:
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error = _("Invalid agent_mode: %s") % cfg.CONF.NSX.agent_mode
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LOG.error(error)
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raise nsx_exc.NsxPluginException(err_msg=error)
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self.handle_network_dhcp_access_delegate = (
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mod.handle_network_dhcp_access
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)
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self.handle_port_dhcp_access_delegate = (
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mod.handle_port_dhcp_access
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)
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self.handle_port_metadata_access_delegate = (
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mod.handle_port_metadata_access
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)
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self.handle_metadata_access_delegate = (
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mod.handle_router_metadata_access
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)
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def _setup_rpc_dhcp_metadata(self, notifier=None):
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self.topic = topics.PLUGIN
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self.conn = n_rpc.create_connection(new=True)
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self.endpoints = [dhcp_rpc.DhcpRpcCallback(),
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agents_db.AgentExtRpcCallback()]
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self.conn.create_consumer(self.topic, self.endpoints, fanout=False)
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self.agent_notifiers[const.AGENT_TYPE_DHCP] = (
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notifier or dhcp_rpc_agent_api.DhcpAgentNotifyAPI())
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self.conn.consume_in_threads()
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self.network_scheduler = importutils.import_object(
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cfg.CONF.network_scheduler_driver
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)
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self.supported_extension_aliases.extend(
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['agent', 'dhcp_agent_scheduler'])
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def _setup_nsx_dhcp_metadata(self):
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self._check_services_requirements()
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nsx_svc.register_dhcp_opts(cfg)
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nsx_svc.register_metadata_opts(cfg)
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lsnmanager.register_lsn_opts(cfg)
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lsn_manager = lsnmanager.PersistentLsnManager(self.safe_reference)
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self.lsn_manager = lsn_manager
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if cfg.CONF.NSX.agent_mode == config.AgentModes.AGENTLESS:
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notifier = nsx_svc.DhcpAgentNotifyAPI(self.safe_reference,
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lsn_manager)
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self.agent_notifiers[const.AGENT_TYPE_DHCP] = notifier
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# In agentless mode, ports whose owner is DHCP need to
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# be special cased; so add it to the list of special
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# owners list
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if const.DEVICE_OWNER_DHCP not in self.port_special_owners:
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self.port_special_owners.append(const.DEVICE_OWNER_DHCP)
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elif cfg.CONF.NSX.agent_mode == config.AgentModes.COMBINED:
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# This becomes ineffective, as all new networks creations
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# are handled by Logical Services Nodes in NSX
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cfg.CONF.set_override('network_auto_schedule', False)
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LOG.warn(_('network_auto_schedule has been disabled'))
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notifier = combined.DhcpAgentNotifyAPI(self.safe_reference,
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lsn_manager)
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self.supported_extension_aliases.append(lsn.EXT_ALIAS)
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# Add the capability to migrate dhcp and metadata services over
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self.migration_manager = (
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migration.MigrationManager(
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self.safe_reference, lsn_manager, notifier))
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return notifier
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def _init_extensions(self):
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extensions = (lsn.EXT_ALIAS, 'agent', 'dhcp_agent_scheduler')
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for ext in extensions:
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if ext in self.supported_extension_aliases:
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self.supported_extension_aliases.remove(ext)
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def _check_services_requirements(self):
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try:
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error = None
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nsx_svc.check_services_requirements(self.cluster)
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except nsx_exc.InvalidVersion:
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error = _("Unable to run Neutron with config option '%s', as NSX "
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"does not support it") % cfg.CONF.NSX.agent_mode
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except nsx_exc.ServiceClusterUnavailable:
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error = _("Unmet dependency for config option "
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"'%s'") % cfg.CONF.NSX.agent_mode
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if error:
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LOG.exception(error)
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raise nsx_exc.NsxPluginException(err_msg=error)
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def get_lsn(self, context, network_id, fields=None):
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report = self.migration_manager.report(context, network_id)
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return {'network': network_id, 'report': report}
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def create_lsn(self, context, lsn):
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network_id = lsn['lsn']['network']
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subnet = self.migration_manager.validate(context, network_id)
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subnet_id = None if not subnet else subnet['id']
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self.migration_manager.migrate(context, network_id, subnet)
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r = self.migration_manager.report(context, network_id, subnet_id)
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return {'network': network_id, 'report': r}
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def handle_network_dhcp_access(self, context, network, action):
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self.handle_network_dhcp_access_delegate(self.safe_reference, context,
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network, action)
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def handle_port_dhcp_access(self, context, port_data, action):
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self.handle_port_dhcp_access_delegate(self.safe_reference, context,
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port_data, action)
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def handle_port_metadata_access(self, context, port, is_delete=False):
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self.handle_port_metadata_access_delegate(self.safe_reference, context,
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port, is_delete)
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def handle_router_metadata_access(self, context,
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router_id, interface=None):
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self.handle_metadata_access_delegate(self.safe_reference, context,
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router_id, interface)
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