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OpenStack Study: dhcpmeta_modes.py**** CubicPower OpenStack Study ****
# # All Rights Reserved # # Licensed under the Apache License, Version 2.0 (the "License"); you may # not use this file except in compliance with the License. You may obtain # a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the # License for the specific language governing permissions and limitations # under the License. # from oslo.config import cfg from neutron.api.rpc.agentnotifiers import dhcp_rpc_agent_api from neutron.common import constants as const from neutron.common import topics from neutron.openstack.common import importutils from neutron.openstack.common import log as logging from neutron.openstack.common import rpc from neutron.plugins.vmware.common import config from neutron.plugins.vmware.common import exceptions as nsx_exc from neutron.plugins.vmware.dhcp_meta import combined from neutron.plugins.vmware.dhcp_meta import lsnmanager from neutron.plugins.vmware.dhcp_meta import migration from neutron.plugins.vmware.dhcp_meta import nsx as nsx_svc from neutron.plugins.vmware.dhcp_meta import rpc as nsx_rpc from neutron.plugins.vmware.extensions import lsn LOG = logging.getLogger(__name__)
**** CubicPower OpenStack Study **** class DhcpMetadataAccess(object):
**** CubicPower OpenStack Study **** def setup_dhcpmeta_access(self): """Initialize support for DHCP and Metadata services.""" self._init_extensions() if cfg.CONF.NSX.agent_mode == config.AgentModes.AGENT: self._setup_rpc_dhcp_metadata() mod = nsx_rpc elif cfg.CONF.NSX.agent_mode == config.AgentModes.AGENTLESS: self._setup_nsx_dhcp_metadata() mod = nsx_svc elif cfg.CONF.NSX.agent_mode == config.AgentModes.COMBINED: notifier = self._setup_nsx_dhcp_metadata() self._setup_rpc_dhcp_metadata(notifier=notifier) mod = combined else: error = _("Invalid agent_mode: %s") % cfg.CONF.NSX.agent_mode LOG.error(error) raise nsx_exc.NsxPluginException(err_msg=error) self.handle_network_dhcp_access_delegate = ( mod.handle_network_dhcp_access ) self.handle_port_dhcp_access_delegate = ( mod.handle_port_dhcp_access ) self.handle_port_metadata_access_delegate = ( mod.handle_port_metadata_access ) self.handle_metadata_access_delegate = ( mod.handle_router_metadata_access )
**** CubicPower OpenStack Study **** def _setup_rpc_dhcp_metadata(self, notifier=None): self.topic = topics.PLUGIN self.conn = rpc.create_connection(new=True) self.dispatcher = nsx_rpc.NSXRpcCallbacks().create_rpc_dispatcher() self.conn.create_consumer(self.topic, self.dispatcher, fanout=False) self.agent_notifiers[const.AGENT_TYPE_DHCP] = ( notifier or dhcp_rpc_agent_api.DhcpAgentNotifyAPI()) self.conn.consume_in_thread() self.network_scheduler = importutils.import_object( cfg.CONF.network_scheduler_driver ) self.supported_extension_aliases.extend( ['agent', 'dhcp_agent_scheduler'])
**** CubicPower OpenStack Study **** def _setup_nsx_dhcp_metadata(self): self._check_services_requirements() nsx_svc.register_dhcp_opts(cfg) nsx_svc.register_metadata_opts(cfg) lsnmanager.register_lsn_opts(cfg) lsn_manager = lsnmanager.PersistentLsnManager(self) self.lsn_manager = lsn_manager if cfg.CONF.NSX.agent_mode == config.AgentModes.AGENTLESS: notifier = nsx_svc.DhcpAgentNotifyAPI(self, lsn_manager) self.agent_notifiers[const.AGENT_TYPE_DHCP] = notifier # In agentless mode, ports whose owner is DHCP need to # be special cased; so add it to the list of special # owners list if const.DEVICE_OWNER_DHCP not in self.port_special_owners: self.port_special_owners.append(const.DEVICE_OWNER_DHCP) elif cfg.CONF.NSX.agent_mode == config.AgentModes.COMBINED: # This becomes ineffective, as all new networks creations # are handled by Logical Services Nodes in NSX cfg.CONF.set_override('network_auto_schedule', False) LOG.warn(_('network_auto_schedule has been disabled')) notifier = combined.DhcpAgentNotifyAPI(self, lsn_manager) self.supported_extension_aliases.append(lsn.EXT_ALIAS) # Add the capability to migrate dhcp and metadata services over self.migration_manager = ( migration.MigrationManager(self, lsn_manager, notifier)) return notifier
**** CubicPower OpenStack Study **** def _init_extensions(self): extensions = (lsn.EXT_ALIAS, 'agent', 'dhcp_agent_scheduler') for ext in extensions: if ext in self.supported_extension_aliases: self.supported_extension_aliases.remove(ext)
**** CubicPower OpenStack Study **** def _check_services_requirements(self): try: error = None nsx_svc.check_services_requirements(self.cluster) except nsx_exc.InvalidVersion: error = _("Unable to run Neutron with config option '%s', as NSX " "does not support it") % cfg.CONF.NSX.agent_mode except nsx_exc.ServiceClusterUnavailable: error = _("Unmet dependency for config option " "'%s'") % cfg.CONF.NSX.agent_mode if error: LOG.exception(error) raise nsx_exc.NsxPluginException(err_msg=error)
**** CubicPower OpenStack Study **** def get_lsn(self, context, network_id, fields=None): report = self.migration_manager.report(context, network_id) return {'network': network_id, 'report': report}
**** CubicPower OpenStack Study **** def create_lsn(self, context, lsn): network_id = lsn['lsn']['network'] subnet = self.migration_manager.validate(context, network_id) subnet_id = None if not subnet else subnet['id'] self.migration_manager.migrate(context, network_id, subnet) r = self.migration_manager.report(context, network_id, subnet_id) return {'network': network_id, 'report': r}
**** CubicPower OpenStack Study **** def handle_network_dhcp_access(self, context, network, action): self.handle_network_dhcp_access_delegate(self, context, network, action)
**** CubicPower OpenStack Study **** def handle_port_dhcp_access(self, context, port_data, action): self.handle_port_dhcp_access_delegate(self, context, port_data, action)
**** CubicPower OpenStack Study **** def handle_port_metadata_access(self, context, port, is_delete=False): self.handle_port_metadata_access_delegate(self, context, port, is_delete)
**** CubicPower OpenStack Study **** def handle_router_metadata_access(self, context, router_id, interface=None): self.handle_metadata_access_delegate(self, context, router_id, interface)
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