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OpenStack Study: lb_neutron_plugin.py**** CubicPower OpenStack Study ****
# Copyright (c) 2012 OpenStack Foundation. # # 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. import sys from oslo.config import cfg from neutron.agent import securitygroups_rpc as sg_rpc from neutron.api.rpc.agentnotifiers import dhcp_rpc_agent_api from neutron.api.rpc.agentnotifiers import l3_rpc_agent_api from neutron.api.v2 import attributes from neutron.common import constants as q_const from neutron.common import exceptions as n_exc from neutron.common import rpc as q_rpc from neutron.common import topics from neutron.common import utils from neutron.db import agents_db from neutron.db import agentschedulers_db from neutron.db import api as db_api from neutron.db import db_base_plugin_v2 from neutron.db import dhcp_rpc_base from neutron.db import external_net_db from neutron.db import extraroute_db from neutron.db import l3_agentschedulers_db from neutron.db import l3_gwmode_db from neutron.db import l3_rpc_base from neutron.db import portbindings_db from neutron.db import quota_db # noqa from neutron.db import securitygroups_rpc_base as sg_db_rpc from neutron.extensions import portbindings from neutron.extensions import providernet as provider from neutron import manager from neutron.openstack.common import importutils from neutron.openstack.common import log as logging from neutron.openstack.common import rpc from neutron.openstack.common.rpc import proxy from neutron.plugins.common import constants as svc_constants from neutron.plugins.common import utils as plugin_utils from neutron.plugins.linuxbridge.common import constants from neutron.plugins.linuxbridge.db import l2network_db_v2 as db LOG = logging.getLogger(__name__)
**** CubicPower OpenStack Study **** class LinuxBridgeRpcCallbacks(dhcp_rpc_base.DhcpRpcCallbackMixin,
l3_rpc_base.L3RpcCallbackMixin,
sg_db_rpc.SecurityGroupServerRpcCallbackMixin
): # history # 1.1 Support Security Group RPC RPC_API_VERSION = '1.1' # Device names start with "tap" TAP_PREFIX_LEN = 3
**** CubicPower OpenStack Study **** def create_rpc_dispatcher(self): '''Get the rpc dispatcher for this manager. If a manager would like to set an rpc API version, or support more than one class as the target of rpc messages, override this method. ''' return q_rpc.PluginRpcDispatcher([self, agents_db.AgentExtRpcCallback()]) @classmethod
**** CubicPower OpenStack Study **** def get_port_from_device(cls, device): port = db.get_port_from_device(device[cls.TAP_PREFIX_LEN:]) if port: port['device'] = device return port
**** CubicPower OpenStack Study **** def get_device_details(self, rpc_context, **kwargs): """Agent requests device details.""" agent_id = kwargs.get('agent_id') device = kwargs.get('device') LOG.debug(_("Device %(device)s details requested from %(agent_id)s"), {'device': device, 'agent_id': agent_id}) port = self.get_port_from_device(device) if port: binding = db.get_network_binding(db_api.get_session(), port['network_id']) (network_type, segmentation_id) = constants.interpret_vlan_id(binding.vlan_id) entry = {'device': device, 'network_type': network_type, 'physical_network': binding.physical_network, 'segmentation_id': segmentation_id, 'network_id': port['network_id'], 'port_id': port['id'], 'admin_state_up': port['admin_state_up']} if cfg.CONF.AGENT.rpc_support_old_agents: entry['vlan_id'] = binding.vlan_id new_status = (q_const.PORT_STATUS_ACTIVE if port['admin_state_up'] else q_const.PORT_STATUS_DOWN) if port['status'] != new_status: db.set_port_status(port['id'], new_status) else: entry = {'device': device} LOG.debug(_("%s can not be found in database"), device) return entry
**** CubicPower OpenStack Study **** def update_device_down(self, rpc_context, **kwargs): """Device no longer exists on agent.""" # TODO(garyk) - live migration and port status agent_id = kwargs.get('agent_id') device = kwargs.get('device') host = kwargs.get('host') port = self.get_port_from_device(device) LOG.debug(_("Device %(device)s no longer exists on %(agent_id)s"), {'device': device, 'agent_id': agent_id}) plugin = manager.NeutronManager.get_plugin() if port: entry = {'device': device, 'exists': True} if (host and not plugin.get_port_host(rpc_context, port['id']) == host): LOG.debug(_("Device %(device)s not bound to the" " agent host %(host)s"), {'device': device, 'host': host}) elif port['status'] != q_const.PORT_STATUS_DOWN: # Set port status to DOWN db.set_port_status(port['id'], q_const.PORT_STATUS_DOWN) else: entry = {'device': device, 'exists': False} LOG.debug(_("%s can not be found in database"), device) return entry
**** CubicPower OpenStack Study **** def update_device_up(self, rpc_context, **kwargs): """Device is up on agent.""" agent_id = kwargs.get('agent_id') device = kwargs.get('device') host = kwargs.get('host') port = self.get_port_from_device(device) LOG.debug(_("Device %(device)s up on %(agent_id)s"), {'device': device, 'agent_id': agent_id}) plugin = manager.NeutronManager.get_plugin() if port: if (host and not plugin.get_port_host(rpc_context, port['id']) == host): LOG.debug(_("Device %(device)s not bound to the" " agent host %(host)s"), {'device': device, 'host': host}) return elif port['status'] != q_const.PORT_STATUS_ACTIVE: db.set_port_status(port['id'], q_const.PORT_STATUS_ACTIVE) else: LOG.debug(_("%s can not be found in database"), device)
**** CubicPower OpenStack Study **** class AgentNotifierApi(proxy.RpcProxy,
sg_rpc.SecurityGroupAgentRpcApiMixin): '''Agent side of the linux bridge rpc API. API version history: 1.0 - Initial version. 1.1 - Added get_active_networks_info, create_dhcp_port, and update_dhcp_port methods. ''' BASE_RPC_API_VERSION = '1.1'
**** CubicPower OpenStack Study **** def __init__(self, topic): super(AgentNotifierApi, self).__init__( topic=topic, default_version=self.BASE_RPC_API_VERSION) self.topic = topic self.topic_network_delete = topics.get_topic_name(topic, topics.NETWORK, topics.DELETE) self.topic_port_update = topics.get_topic_name(topic, topics.PORT, topics.UPDATE)
**** CubicPower OpenStack Study **** def network_delete(self, context, network_id): self.fanout_cast(context, self.make_msg('network_delete', network_id=network_id), topic=self.topic_network_delete)
**** CubicPower OpenStack Study **** def port_update(self, context, port, physical_network, vlan_id): network_type, segmentation_id = constants.interpret_vlan_id(vlan_id) kwargs = {'port': port, 'network_type': network_type, 'physical_network': physical_network, 'segmentation_id': segmentation_id} if cfg.CONF.AGENT.rpc_support_old_agents: kwargs['vlan_id'] = vlan_id msg = self.make_msg('port_update', **kwargs) self.fanout_cast(context, msg, topic=self.topic_port_update)
**** CubicPower OpenStack Study **** class LinuxBridgePluginV2(db_base_plugin_v2.NeutronDbPluginV2,
external_net_db.External_net_db_mixin,
extraroute_db.ExtraRoute_db_mixin,
l3_gwmode_db.L3_NAT_db_mixin,
sg_db_rpc.SecurityGroupServerRpcMixin,
l3_agentschedulers_db.L3AgentSchedulerDbMixin,
agentschedulers_db.DhcpAgentSchedulerDbMixin,
portbindings_db.PortBindingMixin): """Implement the Neutron abstractions using Linux bridging. A new VLAN is created for each network. An agent is relied upon to perform the actual Linux bridge configuration on each host. The provider extension is also supported. As discussed in https://bugs.launchpad.net/neutron/+bug/1023156, this class could be simplified, and filtering on extended attributes could be handled, by adding support for extended attributes to the NeutronDbPluginV2 base class. When that occurs, this class should be updated to take advantage of it. The port binding extension enables an external application relay information to and from the plugin. """ # This attribute specifies whether the plugin supports or not # bulk/pagination/sorting operations. Name mangling is used in # order to ensure it is qualified by class __native_bulk_support = True __native_pagination_support = True __native_sorting_support = True _supported_extension_aliases = ["provider", "external-net", "router", "ext-gw-mode", "binding", "quotas", "security-group", "agent", "extraroute", "l3_agent_scheduler", "dhcp_agent_scheduler"] @property
**** CubicPower OpenStack Study **** def supported_extension_aliases(self): if not hasattr(self, '_aliases'): aliases = self._supported_extension_aliases[:] sg_rpc.disable_security_group_extension_by_config(aliases) self._aliases = aliases return self._aliases
**** CubicPower OpenStack Study **** def __init__(self): super(LinuxBridgePluginV2, self).__init__() self.base_binding_dict = { portbindings.VIF_TYPE: portbindings.VIF_TYPE_BRIDGE, portbindings.VIF_DETAILS: { # TODO(rkukura): Replace with new VIF security details portbindings.CAP_PORT_FILTER: 'security-group' in self.supported_extension_aliases}} self._parse_network_vlan_ranges() db.sync_network_states(self.network_vlan_ranges) self.tenant_network_type = cfg.CONF.VLANS.tenant_network_type if self.tenant_network_type not in [svc_constants.TYPE_LOCAL, svc_constants.TYPE_VLAN, svc_constants.TYPE_NONE]: LOG.error(_("Invalid tenant_network_type: %s. " "Service terminated!"), self.tenant_network_type) sys.exit(1) self._setup_rpc() self.network_scheduler = importutils.import_object( cfg.CONF.network_scheduler_driver ) self.router_scheduler = importutils.import_object( cfg.CONF.router_scheduler_driver ) LOG.debug(_("Linux Bridge Plugin initialization complete"))
**** CubicPower OpenStack Study **** def _setup_rpc(self): # RPC support self.service_topics = {svc_constants.CORE: topics.PLUGIN, svc_constants.L3_ROUTER_NAT: topics.L3PLUGIN} self.conn = rpc.create_connection(new=True) self.callbacks = LinuxBridgeRpcCallbacks() self.dispatcher = self.callbacks.create_rpc_dispatcher() for svc_topic in self.service_topics.values(): self.conn.create_consumer(svc_topic, self.dispatcher, fanout=False) # Consume from all consumers in a thread self.conn.consume_in_thread() self.notifier = AgentNotifierApi(topics.AGENT) self.agent_notifiers[q_const.AGENT_TYPE_DHCP] = ( dhcp_rpc_agent_api.DhcpAgentNotifyAPI() ) self.agent_notifiers[q_const.AGENT_TYPE_L3] = ( l3_rpc_agent_api.L3AgentNotify )
**** CubicPower OpenStack Study **** def _parse_network_vlan_ranges(self): try: self.network_vlan_ranges = plugin_utils.parse_network_vlan_ranges( cfg.CONF.VLANS.network_vlan_ranges) except Exception as ex: LOG.error(_("%s. Agent terminated!"), ex) sys.exit(1) LOG.info(_("Network VLAN ranges: %s"), self.network_vlan_ranges)
**** CubicPower OpenStack Study **** def _add_network_vlan_range(self, physical_network, vlan_min, vlan_max): self._add_network(physical_network) self.network_vlan_ranges[physical_network].append((vlan_min, vlan_max))
**** CubicPower OpenStack Study **** def _add_network(self, physical_network): if physical_network not in self.network_vlan_ranges: self.network_vlan_ranges[physical_network] = []
**** CubicPower OpenStack Study **** def _extend_network_dict_provider(self, context, network): binding = db.get_network_binding(context.session, network['id']) if binding.vlan_id == constants.FLAT_VLAN_ID: network[provider.NETWORK_TYPE] = svc_constants.TYPE_FLAT network[provider.PHYSICAL_NETWORK] = binding.physical_network network[provider.SEGMENTATION_ID] = None elif binding.vlan_id == constants.LOCAL_VLAN_ID: network[provider.NETWORK_TYPE] = svc_constants.TYPE_LOCAL network[provider.PHYSICAL_NETWORK] = None network[provider.SEGMENTATION_ID] = None else: network[provider.NETWORK_TYPE] = svc_constants.TYPE_VLAN network[provider.PHYSICAL_NETWORK] = binding.physical_network network[provider.SEGMENTATION_ID] = binding.vlan_id
**** CubicPower OpenStack Study **** def _process_provider_create(self, context, attrs): network_type = attrs.get(provider.NETWORK_TYPE) physical_network = attrs.get(provider.PHYSICAL_NETWORK) segmentation_id = attrs.get(provider.SEGMENTATION_ID) network_type_set = attributes.is_attr_set(network_type) physical_network_set = attributes.is_attr_set(physical_network) segmentation_id_set = attributes.is_attr_set(segmentation_id) if not (network_type_set or physical_network_set or segmentation_id_set): return (None, None, None) if not network_type_set: msg = _("provider:network_type required") raise n_exc.InvalidInput(error_message=msg) elif network_type == svc_constants.TYPE_FLAT: if segmentation_id_set: msg = _("provider:segmentation_id specified for flat network") raise n_exc.InvalidInput(error_message=msg) else: segmentation_id = constants.FLAT_VLAN_ID elif network_type == svc_constants.TYPE_VLAN: if not segmentation_id_set: msg = _("provider:segmentation_id required") raise n_exc.InvalidInput(error_message=msg) if not utils.is_valid_vlan_tag(segmentation_id): msg = (_("provider:segmentation_id out of range " "(%(min_id)s through %(max_id)s)") % {'min_id': q_const.MIN_VLAN_TAG, 'max_id': q_const.MAX_VLAN_TAG}) raise n_exc.InvalidInput(error_message=msg) elif network_type == svc_constants.TYPE_LOCAL: if physical_network_set: msg = _("provider:physical_network specified for local " "network") raise n_exc.InvalidInput(error_message=msg) else: physical_network = None if segmentation_id_set: msg = _("provider:segmentation_id specified for local " "network") raise n_exc.InvalidInput(error_message=msg) else: segmentation_id = constants.LOCAL_VLAN_ID else: msg = _("provider:network_type %s not supported") % network_type raise n_exc.InvalidInput(error_message=msg) if network_type in [svc_constants.TYPE_VLAN, svc_constants.TYPE_FLAT]: if physical_network_set: if physical_network not in self.network_vlan_ranges: msg = (_("Unknown provider:physical_network %s") % physical_network) raise n_exc.InvalidInput(error_message=msg) elif 'default' in self.network_vlan_ranges: physical_network = 'default' else: msg = _("provider:physical_network required") raise n_exc.InvalidInput(error_message=msg) return (network_type, physical_network, segmentation_id)
**** CubicPower OpenStack Study **** def create_network(self, context, network): (network_type, physical_network, vlan_id) = self._process_provider_create(context, network['network']) session = context.session with session.begin(subtransactions=True): #set up default security groups tenant_id = self._get_tenant_id_for_create( context, network['network']) self._ensure_default_security_group(context, tenant_id) if not network_type: # tenant network network_type = self.tenant_network_type if network_type == svc_constants.TYPE_NONE: raise n_exc.TenantNetworksDisabled() elif network_type == svc_constants.TYPE_VLAN: physical_network, vlan_id = db.reserve_network(session) else: # TYPE_LOCAL vlan_id = constants.LOCAL_VLAN_ID else: # provider network if network_type in [svc_constants.TYPE_VLAN, svc_constants.TYPE_FLAT]: db.reserve_specific_network(session, physical_network, vlan_id) # no reservation needed for TYPE_LOCAL net = super(LinuxBridgePluginV2, self).create_network(context, network) db.add_network_binding(session, net['id'], physical_network, vlan_id) self._process_l3_create(context, net, network['network']) self._extend_network_dict_provider(context, net) # note - exception will rollback entire transaction return net
**** CubicPower OpenStack Study **** def update_network(self, context, id, network): provider._raise_if_updates_provider_attributes(network['network']) session = context.session with session.begin(subtransactions=True): net = super(LinuxBridgePluginV2, self).update_network(context, id, network) self._process_l3_update(context, net, network['network']) self._extend_network_dict_provider(context, net) return net
**** CubicPower OpenStack Study **** def delete_network(self, context, id): session = context.session with session.begin(subtransactions=True): binding = db.get_network_binding(session, id) super(LinuxBridgePluginV2, self).delete_network(context, id) if binding.vlan_id != constants.LOCAL_VLAN_ID: db.release_network(session, binding.physical_network, binding.vlan_id, self.network_vlan_ranges) # the network_binding record is deleted via cascade from # the network record, so explicit removal is not necessary self.notifier.network_delete(context, id)
**** CubicPower OpenStack Study **** def get_network(self, context, id, fields=None): session = context.session with session.begin(subtransactions=True): net = super(LinuxBridgePluginV2, self).get_network(context, id, None) self._extend_network_dict_provider(context, net) return self._fields(net, fields)
**** CubicPower OpenStack Study **** def get_networks(self, context, filters=None, fields=None, sorts=None, limit=None, marker=None, page_reverse=False): session = context.session with session.begin(subtransactions=True): nets = super(LinuxBridgePluginV2, self).get_networks(context, filters, None, sorts, limit, marker, page_reverse) for net in nets: self._extend_network_dict_provider(context, net) return [self._fields(net, fields) for net in nets]
**** CubicPower OpenStack Study **** def create_port(self, context, port): session = context.session port_data = port['port'] with session.begin(subtransactions=True): self._ensure_default_security_group_on_port(context, port) sgids = self._get_security_groups_on_port(context, port) # Set port status as 'DOWN'. This will be updated by agent port['port']['status'] = q_const.PORT_STATUS_DOWN port = super(LinuxBridgePluginV2, self).create_port(context, port) self._process_portbindings_create_and_update(context, port_data, port) self._process_port_create_security_group( context, port, sgids) self.notify_security_groups_member_updated(context, port) return port
**** CubicPower OpenStack Study **** def update_port(self, context, id, port): original_port = self.get_port(context, id) session = context.session need_port_update_notify = False with session.begin(subtransactions=True): updated_port = super(LinuxBridgePluginV2, self).update_port( context, id, port) self._process_portbindings_create_and_update(context, port['port'], updated_port) need_port_update_notify = self.update_security_group_on_port( context, id, port, original_port, updated_port) need_port_update_notify |= self.is_security_group_member_updated( context, original_port, updated_port) if original_port['admin_state_up'] != updated_port['admin_state_up']: need_port_update_notify = True if need_port_update_notify: self._notify_port_updated(context, updated_port) return updated_port
**** CubicPower OpenStack Study **** def delete_port(self, context, id, l3_port_check=True): # if needed, check to see if this is a port owned by # and l3-router. If so, we should prevent deletion. if l3_port_check: self.prevent_l3_port_deletion(context, id) session = context.session with session.begin(subtransactions=True): self.disassociate_floatingips(context, id) port = self.get_port(context, id) self._delete_port_security_group_bindings(context, id) super(LinuxBridgePluginV2, self).delete_port(context, id) self.notify_security_groups_member_updated(context, port)
**** CubicPower OpenStack Study **** def _notify_port_updated(self, context, port): binding = db.get_network_binding(context.session, port['network_id']) self.notifier.port_update(context, port, binding.physical_network, binding.vlan_id)
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