vmware-nsx/neutron/plugins/ml2/plugin.py
2013-08-07 16:16:12 +00:00

417 lines
19 KiB
Python

# Copyright (c) 2013 OpenStack Foundation
# 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.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 const
from neutron.common import exceptions as exc
from neutron.common import topics
from neutron.db import agentschedulers_db
from neutron.db import db_base_plugin_v2
from neutron.db import extraroute_db
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.openstack.common import excutils
from neutron.openstack.common import importutils
from neutron.openstack.common import log
from neutron.openstack.common import rpc as c_rpc
from neutron.plugins.ml2.common import exceptions as ml2_exc
from neutron.plugins.ml2 import config # noqa
from neutron.plugins.ml2 import db
from neutron.plugins.ml2 import driver_api as api
from neutron.plugins.ml2 import driver_context
from neutron.plugins.ml2 import managers
from neutron.plugins.ml2 import rpc
LOG = log.getLogger(__name__)
# REVISIT(rkukura): Move this and other network_type constants to
# providernet.py?
TYPE_MULTI_SEGMENT = 'multi-segment'
class Ml2Plugin(db_base_plugin_v2.NeutronDbPluginV2,
extraroute_db.ExtraRoute_db_mixin,
sg_db_rpc.SecurityGroupServerRpcMixin,
agentschedulers_db.L3AgentSchedulerDbMixin,
agentschedulers_db.DhcpAgentSchedulerDbMixin,
portbindings_db.PortBindingMixin):
"""Implement the Neutron L2 abstractions using modules.
Ml2Plugin is a Neutron plugin based on separately extensible sets
of network types and mechanisms for connecting to networks of
those types. The network types and mechanisms are implemented as
drivers loaded via Python entry points. Networks can be made up of
multiple segments (not yet fully implemented).
"""
# 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
# List of supported extensions
_supported_extension_aliases = ["provider", "router", "extraroute",
"binding", "quotas", "security-group",
"agent", "l3_agent_scheduler",
"dhcp_agent_scheduler"]
@property
def supported_extension_aliases(self):
if not hasattr(self, '_aliases'):
aliases = self._supported_extension_aliases[:]
sg_rpc.disable_security_group_extension_if_noop_driver(aliases)
self._aliases = aliases
return self._aliases
def __init__(self):
# First load drivers, then initialize DB, then initialize drivers
self.type_manager = managers.TypeManager()
self.mechanism_manager = managers.MechanismManager()
db.initialize()
self.type_manager.initialize()
self.mechanism_manager.initialize()
self._setup_rpc()
# REVISIT(rkukura): Use stevedore for these?
self.network_scheduler = importutils.import_object(
cfg.CONF.network_scheduler_driver
)
self.router_scheduler = importutils.import_object(
cfg.CONF.router_scheduler_driver
)
LOG.info(_("Modular L2 Plugin initialization complete"))
def _setup_rpc(self):
self.notifier = rpc.AgentNotifierApi(topics.AGENT)
self.agent_notifiers[const.AGENT_TYPE_DHCP] = (
dhcp_rpc_agent_api.DhcpAgentNotifyAPI()
)
self.agent_notifiers[const.AGENT_TYPE_L3] = (
l3_rpc_agent_api.L3AgentNotify
)
self.callbacks = rpc.RpcCallbacks(self.notifier, self.type_manager)
self.topic = topics.PLUGIN
self.conn = c_rpc.create_connection(new=True)
self.dispatcher = self.callbacks.create_rpc_dispatcher()
self.conn.create_consumer(self.topic, self.dispatcher,
fanout=False)
self.conn.consume_in_thread()
def _process_provider_create(self, context, attrs):
network_type = self._get_attribute(attrs, provider.NETWORK_TYPE)
physical_network = self._get_attribute(attrs,
provider.PHYSICAL_NETWORK)
segmentation_id = self._get_attribute(attrs, provider.SEGMENTATION_ID)
if attributes.is_attr_set(network_type):
segment = {api.NETWORK_TYPE: network_type,
api.PHYSICAL_NETWORK: physical_network,
api.SEGMENTATION_ID: segmentation_id}
self.type_manager.validate_provider_segment(segment)
return segment
if (attributes.is_attr_set(attrs.get(provider.PHYSICAL_NETWORK)) or
attributes.is_attr_set(attrs.get(provider.SEGMENTATION_ID))):
msg = _("network_type required if other provider attributes "
"specified")
raise exc.InvalidInput(error_message=msg)
def _get_attribute(self, attrs, key):
value = attrs.get(key)
if value is attributes.ATTR_NOT_SPECIFIED:
value = None
return value
def _extend_network_dict_provider(self, context, network):
id = network['id']
segments = self.get_network_segments(context, id)
if not segments:
LOG.error(_("Network %s has no segments"), id)
network[provider.NETWORK_TYPE] = None
network[provider.PHYSICAL_NETWORK] = None
network[provider.SEGMENTATION_ID] = None
elif len(segments) > 1:
network[provider.NETWORK_TYPE] = TYPE_MULTI_SEGMENT
network[provider.PHYSICAL_NETWORK] = None
network[provider.SEGMENTATION_ID] = None
else:
segment = segments[0]
network[provider.NETWORK_TYPE] = segment[api.NETWORK_TYPE]
network[provider.PHYSICAL_NETWORK] = segment[api.PHYSICAL_NETWORK]
network[provider.SEGMENTATION_ID] = segment[api.SEGMENTATION_ID]
def _filter_nets_provider(self, context, nets, filters):
# TODO(rkukura): Implement filtering.
return nets
def _extend_port_dict_binding(self, context, port):
# TODO(rkukura): Implement based on host_id, agents, and
# MechanismDrivers. Also set CAPABILITIES. Use
# base_binding_dict if applicable, or maybe a new hook so
# base handles field processing and get_port and get_ports
# don't need to be overridden.
port[portbindings.VIF_TYPE] = portbindings.VIF_TYPE_UNBOUND
def _notify_port_updated(self, context, port):
session = context.session
with session.begin(subtransactions=True):
network_id = port['network_id']
segments = self.get_network_segments(context, network_id)
if not segments:
LOG.warning(_("In _notify_port_updated() for port %(port_id), "
"network %(network_id) has no segments"),
{'port_id': port['id'],
'network_id': network_id})
return
# TODO(rkukura): Use port binding to select segment.
segment = segments[0]
self.notifier.port_update(context, port,
segment[api.NETWORK_TYPE],
segment[api.SEGMENTATION_ID],
segment[api.PHYSICAL_NETWORK])
# TODO(apech): Need to override bulk operations
def create_network(self, context, network):
attrs = network['network']
segment = self._process_provider_create(context, attrs)
tenant_id = self._get_tenant_id_for_create(context, attrs)
session = context.session
with session.begin(subtransactions=True):
self._ensure_default_security_group(context, tenant_id)
if segment:
self.type_manager.reserve_provider_segment(session, segment)
else:
segment = self.type_manager.allocate_tenant_segment(session)
result = super(Ml2Plugin, self).create_network(context, network)
id = result['id']
self._process_l3_create(context, result, attrs)
# REVISIT(rkukura): Consider moving all segment management
# to TypeManager.
db.add_network_segment(session, id, segment)
self._extend_network_dict_provider(context, result)
mech_context = driver_context.NetworkContext(self,
context,
result,
segments=[segment])
self.mechanism_manager.create_network_precommit(mech_context)
try:
self.mechanism_manager.create_network_postcommit(mech_context)
except ml2_exc.MechanismDriverError:
with excutils.save_and_reraise_exception():
LOG.error(_("mechanism_manager.create_network failed, "
"deleting network '%s'"), result['id'])
self.delete_network(context, result['id'])
return result
def update_network(self, context, id, network):
provider._raise_if_updates_provider_attributes(network['network'])
session = context.session
with session.begin(subtransactions=True):
original_network = super(Ml2Plugin, self).get_network(context, id)
updated_network = super(Ml2Plugin, self).update_network(context,
id,
network)
self._process_l3_update(context, updated_network,
network['network'])
self._extend_network_dict_provider(context, updated_network)
mech_context = driver_context.NetworkContext(
self, context, updated_network,
original_network=original_network)
self.mechanism_manager.update_network_precommit(mech_context)
# TODO(apech) - handle errors raised by update_network, potentially
# by re-calling update_network with the previous attributes. For
# now the error is propogated to the caller, which is expected to
# either undo/retry the operation or delete the resource.
self.mechanism_manager.update_network_postcommit(mech_context)
return updated_network
def get_network(self, context, id, fields=None):
session = context.session
with session.begin(subtransactions=True):
result = super(Ml2Plugin, self).get_network(context, id, None)
self._extend_network_dict_provider(context, result)
return self._fields(result, fields)
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(Ml2Plugin,
self).get_networks(context, filters, None, sorts,
limit, marker, page_reverse)
for net in nets:
self._extend_network_dict_provider(context, net)
nets = self._filter_nets_provider(context, nets, filters)
nets = self._filter_nets_l3(context, nets, filters)
return [self._fields(net, fields) for net in nets]
def get_network_segments(self, context, id):
session = context.session
with session.begin(subtransactions=True):
segments = db.get_network_segments(session, id)
return segments
def delete_network(self, context, id):
session = context.session
with session.begin(subtransactions=True):
network = self.get_network(context, id)
segments = self.get_network_segments(context, id)
mech_context = driver_context.NetworkContext(self,
context,
network,
segments=segments)
self.mechanism_manager.delete_network_precommit(mech_context)
super(Ml2Plugin, self).delete_network(context, id)
for segment in segments:
self.type_manager.release_segment(session, segment)
# The segment records are deleted via cascade from the
# network record, so explicit removal is not necessary.
try:
self.mechanism_manager.delete_network_postcommit(mech_context)
except ml2_exc.MechanismDriverError:
# TODO(apech) - One or more mechanism driver failed to
# delete the network. Ideally we'd notify the caller of
# the fact that an error occurred.
pass
self.notifier.network_delete(context, id)
def create_port(self, context, port):
attrs = port['port']
attrs['status'] = const.PORT_STATUS_DOWN
session = context.session
with session.begin(subtransactions=True):
self._ensure_default_security_group_on_port(context, port)
sgids = self._get_security_groups_on_port(context, port)
result = super(Ml2Plugin, self).create_port(context, port)
self._process_portbindings_create_and_update(context, attrs,
result)
self._process_port_create_security_group(context, result, sgids)
self._extend_port_dict_binding(context, result)
mech_context = driver_context.PortContext(self, context, result)
self.mechanism_manager.create_port_precommit(mech_context)
try:
self.mechanism_manager.create_port_postcommit(mech_context)
except ml2_exc.MechanismDriverError:
with excutils.save_and_reraise_exception():
LOG.error(_("mechanism_manager.create_port failed, "
"deleting port '%s'"), result['id'])
self.delete_port(context, result['id'])
self.notify_security_groups_member_updated(context, result)
return result
def update_port(self, context, id, port):
attrs = port['port']
need_port_update_notify = False
session = context.session
with session.begin(subtransactions=True):
original_port = super(Ml2Plugin, self).get_port(context, id)
updated_port = super(Ml2Plugin, self).update_port(context, id,
port)
need_port_update_notify = self.update_security_group_on_port(
context, id, port, original_port, updated_port)
self._process_portbindings_create_and_update(context,
attrs,
updated_port)
self._extend_port_dict_binding(context, updated_port)
mech_context = driver_context.PortContext(
self, context, updated_port,
original_port=original_port)
self.mechanism_manager.update_port_precommit(mech_context)
# TODO(apech) - handle errors raised by update_port, potentially
# by re-calling update_port with the previous attributes. For
# now the error is propogated to the caller, which is expected to
# either undo/retry the operation or delete the resource.
self.mechanism_manager.update_port_postcommit(mech_context)
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
def get_port(self, context, id, fields=None):
session = context.session
with session.begin(subtransactions=True):
port = super(Ml2Plugin, self).get_port(context, id, fields)
self._extend_port_dict_binding(context, port)
return self._fields(port, fields)
def get_ports(self, context, filters=None, fields=None,
sorts=None, limit=None, marker=None, page_reverse=False):
session = context.session
with session.begin(subtransactions=True):
ports = super(Ml2Plugin,
self).get_ports(context, filters, fields, sorts,
limit, marker, page_reverse)
# TODO(nati): filter by security group
for port in ports:
self._extend_port_dict_binding(context, port)
return [self._fields(port, fields) for port in ports]
def delete_port(self, context, id, l3_port_check=True):
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)
mech_context = driver_context.PortContext(self, context, port)
self.mechanism_manager.delete_port_precommit(mech_context)
self._delete_port_security_group_bindings(context, id)
super(Ml2Plugin, self).delete_port(context, id)
try:
self.mechanism_manager.delete_port_postcommit(mech_context)
except ml2_exc.MechanismDriverError:
# TODO(apech) - One or more mechanism driver failed to
# delete the port. Ideally we'd notify the caller of the
# fact that an error occurred.
pass
self.notify_security_groups_member_updated(context, port)