OpenStack Networking (Neutron)
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neutron/neutron/plugins/openvswitch/ovs_neutron_plugin.py

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# Copyright 2011 VMware, Inc.
# 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.
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 allowedaddresspairs_db as addr_pair_db
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 extradhcpopt_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 allowedaddresspairs as addr_pair
from neutron.extensions import extra_dhcp_opt as edo_ext
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.openvswitch.common import config # noqa
from neutron.plugins.openvswitch.common import constants
from neutron.plugins.openvswitch import ovs_db_v2
LOG = logging.getLogger(__name__)
class OVSRpcCallbacks(dhcp_rpc_base.DhcpRpcCallbackMixin,
l3_rpc_base.L3RpcCallbackMixin,
sg_db_rpc.SecurityGroupServerRpcCallbackMixin):
# history
# 1.0 Initial version
# 1.1 Support Security Group RPC
RPC_API_VERSION = '1.1'
def __init__(self, notifier, tunnel_type):
self.notifier = notifier
self.tunnel_type = tunnel_type
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
def get_port_from_device(cls, device):
port = ovs_db_v2.get_port_from_device(device)
if port:
port['device'] = device
return port
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 = ovs_db_v2.get_port(device)
if port:
binding = ovs_db_v2.get_network_binding(None, port['network_id'])
entry = {'device': device,
'network_id': port['network_id'],
'port_id': port['id'],
'admin_state_up': port['admin_state_up'],
'network_type': binding.network_type,
'segmentation_id': binding.segmentation_id,
'physical_network': binding.physical_network}
new_status = (q_const.PORT_STATUS_ACTIVE if port['admin_state_up']
else q_const.PORT_STATUS_DOWN)
if port['status'] != new_status:
ovs_db_v2.set_port_status(port['id'], new_status)
else:
entry = {'device': device}
LOG.debug(_("%s can not be found in database"), device)
return entry
def update_device_down(self, rpc_context, **kwargs):
"""Device no longer exists on agent."""
agent_id = kwargs.get('agent_id')
device = kwargs.get('device')
host = kwargs.get('host')
port = ovs_db_v2.get_port(device)
LOG.debug(_("Device %(device)s no longer exists on %(agent_id)s"),
{'device': device, 'agent_id': agent_id})
if port:
entry = {'device': device,
'exists': True}
plugin = manager.NeutronManager.get_plugin()
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
ovs_db_v2.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
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 = ovs_db_v2.get_port(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:
ovs_db_v2.set_port_status(port['id'],
q_const.PORT_STATUS_ACTIVE)
else:
LOG.debug(_("%s can not be found in database"), device)
def tunnel_sync(self, rpc_context, **kwargs):
"""Update new tunnel.
Updates the datbase with the tunnel IP. All listening agents will also
be notified about the new tunnel IP.
"""
tunnel_ip = kwargs.get('tunnel_ip')
# Update the database with the IP
tunnel = ovs_db_v2.add_tunnel_endpoint(tunnel_ip)
tunnels = ovs_db_v2.get_tunnel_endpoints()
entry = dict()
entry['tunnels'] = tunnels
# Notify all other listening agents
self.notifier.tunnel_update(rpc_context, tunnel.ip_address,
tunnel.id, self.tunnel_type)
# Return the list of tunnels IP's to the agent
return entry
class AgentNotifierApi(proxy.RpcProxy,
sg_rpc.SecurityGroupAgentRpcApiMixin):
'''Agent side of the openvswitch rpc API.
API version history:
1.0 - Initial version.
'''
BASE_RPC_API_VERSION = '1.0'
def __init__(self, topic):
super(AgentNotifierApi, self).__init__(
topic=topic, default_version=self.BASE_RPC_API_VERSION)
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)
self.topic_tunnel_update = topics.get_topic_name(topic,
constants.TUNNEL,
topics.UPDATE)
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)
def port_update(self, context, port, network_type, segmentation_id,
physical_network):
self.fanout_cast(context,
self.make_msg('port_update',
port=port,
network_type=network_type,
segmentation_id=segmentation_id,
physical_network=physical_network),
topic=self.topic_port_update)
def tunnel_update(self, context, tunnel_ip, tunnel_id, tunnel_type):
self.fanout_cast(context,
self.make_msg('tunnel_update',
tunnel_ip=tunnel_ip,
tunnel_id=tunnel_id,
tunnel_type=tunnel_type),
topic=self.topic_tunnel_update)
class OVSNeutronPluginV2(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,
extradhcpopt_db.ExtraDhcpOptMixin,
addr_pair_db.AllowedAddressPairsMixin):
"""Implement the Neutron abstractions using Open vSwitch.
Depending on whether tunneling is enabled, either a GRE, VXLAN tunnel or
a new VLAN is created for each network. An agent is relied upon to
perform the actual OVS 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",
"extra_dhcp_opt",
"allowed-address-pairs"]
@property
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
db_base_plugin_v2.NeutronDbPluginV2.register_dict_extend_funcs(
attributes.NETWORKS, ['_extend_network_dict_provider_ovs'])
def __init__(self, configfile=None):
super(OVSNeutronPluginV2, self).__init__()
self.base_binding_dict = {
portbindings.VIF_TYPE: portbindings.VIF_TYPE_OVS,
portbindings.VIF_DETAILS: {
# TODO(rkukura): Replace with new VIF security details
portbindings.CAP_PORT_FILTER:
'security-group' in self.supported_extension_aliases,
portbindings.OVS_HYBRID_PLUG: True}}
self._parse_network_vlan_ranges()
ovs_db_v2.sync_vlan_allocations(self.network_vlan_ranges)
self.tenant_network_type = cfg.CONF.OVS.tenant_network_type
if self.tenant_network_type not in [svc_constants.TYPE_LOCAL,
svc_constants.TYPE_VLAN,
svc_constants.TYPE_GRE,
svc_constants.TYPE_VXLAN,
svc_constants.TYPE_NONE]:
LOG.error(_("Invalid tenant_network_type: %s. "
"Server terminated!"),
self.tenant_network_type)
sys.exit(1)
self.enable_tunneling = cfg.CONF.OVS.enable_tunneling
self.tunnel_type = None
if self.enable_tunneling:
self.tunnel_type = (cfg.CONF.OVS.tunnel_type or
svc_constants.TYPE_GRE)
elif cfg.CONF.OVS.tunnel_type:
self.tunnel_type = cfg.CONF.OVS.tunnel_type
self.enable_tunneling = True
self.tunnel_id_ranges = []
if self.enable_tunneling:
self._parse_tunnel_id_ranges()
ovs_db_v2.sync_tunnel_allocations(self.tunnel_id_ranges)
elif self.tenant_network_type in constants.TUNNEL_NETWORK_TYPES:
LOG.error(_("Tunneling disabled but tenant_network_type is '%s'. "
"Server 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
)
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.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
)
self.callbacks = OVSRpcCallbacks(self.notifier, self.tunnel_type)
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()
def _parse_network_vlan_ranges(self):
try:
self.network_vlan_ranges = plugin_utils.parse_network_vlan_ranges(
cfg.CONF.OVS.network_vlan_ranges)
except Exception as ex:
LOG.error(_("%s. Server terminated!"), ex)
sys.exit(1)
LOG.info(_("Network VLAN ranges: %s"), self.network_vlan_ranges)
def _parse_tunnel_id_ranges(self):
for entry in cfg.CONF.OVS.tunnel_id_ranges:
entry = entry.strip()
try:
tun_min, tun_max = entry.split(':')
self.tunnel_id_ranges.append((int(tun_min), int(tun_max)))
except ValueError as ex:
LOG.error(_("Invalid tunnel ID range: "
"'%(range)s' - %(e)s. Server terminated!"),
{'range': entry, 'e': ex})
sys.exit(1)
LOG.info(_("Tunnel ID ranges: %s"), self.tunnel_id_ranges)
def _extend_network_dict_provider_ovs(self, network, net_db,
net_binding=None):
# this method used in two cases: when binding is provided explicitly
# and when it is a part of db model object
binding = net_db.binding if net_db else net_binding
network[provider.NETWORK_TYPE] = binding.network_type
if binding.network_type in constants.TUNNEL_NETWORK_TYPES:
network[provider.PHYSICAL_NETWORK] = None
network[provider.SEGMENTATION_ID] = binding.segmentation_id
elif binding.network_type == svc_constants.TYPE_FLAT:
network[provider.PHYSICAL_NETWORK] = binding.physical_network
network[provider.SEGMENTATION_ID] = None
elif binding.network_type == svc_constants.TYPE_VLAN:
network[provider.PHYSICAL_NETWORK] = binding.physical_network
network[provider.SEGMENTATION_ID] = binding.segmentation_id
elif binding.network_type == svc_constants.TYPE_LOCAL:
network[provider.PHYSICAL_NETWORK] = None
network[provider.SEGMENTATION_ID] = None
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 in constants.TUNNEL_NETWORK_TYPES:
if not self.enable_tunneling:
msg = _("%s networks are not enabled") % network_type
raise n_exc.InvalidInput(error_message=msg)
if physical_network_set:
msg = _("provider:physical_network specified for %s "
"network") % network_type
raise n_exc.InvalidInput(error_message=msg)
else:
physical_network = None
if not segmentation_id_set:
msg = _("provider:segmentation_id required")
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 = None
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)
def create_network(self, context, network):
(network_type, physical_network,
segmentation_id) = self._process_provider_create(context,
network['network'])
session = context.session
#set up default security groups
tenant_id = self._get_tenant_id_for_create(
context, network['network'])
self._ensure_default_security_group(context, tenant_id)
with session.begin(subtransactions=True):
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,
segmentation_id) = ovs_db_v2.reserve_vlan(session)
elif network_type in constants.TUNNEL_NETWORK_TYPES:
segmentation_id = ovs_db_v2.reserve_tunnel(session)
# no reservation needed for TYPE_LOCAL
else:
# provider network
if network_type in [svc_constants.TYPE_VLAN,
svc_constants.TYPE_FLAT]:
ovs_db_v2.reserve_specific_vlan(session, physical_network,
segmentation_id)
elif network_type in constants.TUNNEL_NETWORK_TYPES:
ovs_db_v2.reserve_specific_tunnel(session, segmentation_id)
# no reservation needed for TYPE_LOCAL
net = super(OVSNeutronPluginV2, self).create_network(context,
network)
binding = ovs_db_v2.add_network_binding(session, net['id'],
network_type,
physical_network,
segmentation_id)
self._process_l3_create(context, net, network['network'])
# passing None as db model to use binding object
self._extend_network_dict_provider_ovs(net, None, binding)
# note - exception will rollback entire transaction
LOG.debug(_("Created network: %s"), net['id'])
return net
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(OVSNeutronPluginV2, self).update_network(context, id,
network)
self._process_l3_update(context, net, network['network'])
return net
def delete_network(self, context, id):
session = context.session
with session.begin(subtransactions=True):
binding = ovs_db_v2.get_network_binding(session, id)
super(OVSNeutronPluginV2, self).delete_network(context, id)
if binding.network_type in constants.TUNNEL_NETWORK_TYPES:
ovs_db_v2.release_tunnel(session, binding.segmentation_id,
self.tunnel_id_ranges)
elif binding.network_type in [svc_constants.TYPE_VLAN,
svc_constants.TYPE_FLAT]:
ovs_db_v2.release_vlan(session, binding.physical_network,
binding.segmentation_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)
def get_network(self, context, id, fields=None):
session = context.session
with session.begin(subtransactions=True):
net = super(OVSNeutronPluginV2, self).get_network(context,
id, None)
return self._fields(net, 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(OVSNeutronPluginV2,
self).get_networks(context, filters, None, sorts,
limit, marker, page_reverse)
return [self._fields(net, fields) for net in nets]
def create_port(self, context, port):
# Set port status as 'DOWN'. This will be updated by agent
port['port']['status'] = q_const.PORT_STATUS_DOWN
port_data = port['port']
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)
dhcp_opts = port['port'].get(edo_ext.EXTRADHCPOPTS, [])
port = super(OVSNeutronPluginV2, 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._process_port_create_extra_dhcp_opts(context, port,
dhcp_opts)
port[addr_pair.ADDRESS_PAIRS] = (
self._process_create_allowed_address_pairs(
context, port,
port_data.get(addr_pair.ADDRESS_PAIRS)))
self.notify_security_groups_member_updated(context, port)
return port
def update_port(self, context, id, port):
session = context.session
need_port_update_notify = False
changed_fixed_ips = 'fixed_ips' in port['port']
with session.begin(subtransactions=True):
original_port = super(OVSNeutronPluginV2, self).get_port(
context, id)
updated_port = super(OVSNeutronPluginV2, self).update_port(
context, id, port)
if addr_pair.ADDRESS_PAIRS in port['port']:
need_port_update_notify |= (
self.update_address_pairs_on_port(context, id, port,
original_port,
updated_port))
elif changed_fixed_ips:
self._check_fixed_ips_and_address_pairs_no_overlap(
context, updated_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,
port['port'],
updated_port)
need_port_update_notify |= self._update_extra_dhcp_opts_on_port(
context, id, 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:
binding = ovs_db_v2.get_network_binding(None,
updated_port['network_id'])
self.notifier.port_update(context, updated_port,
binding.network_type,
binding.segmentation_id,
binding.physical_network)
return updated_port
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(OVSNeutronPluginV2, self).delete_port(context, id)
self.notify_security_groups_member_updated(context, port)