vmware-nsx/neutron/plugins/linuxbridge/lb_neutron_plugin.py
Oleg Bondarev da65fe6951 Add agent scheduling for LBaaS namespace agent
- adds simple chance scheduling on create pool operation
- adds PoolsLoadbalancerAgentBinding db table
- adds lbaas_agentscheduler extension to list pools hosted by a particular agent
  and to get an agent hosting a particular pool
- adds agent notifiers mapping to AgentSchedulerDbMixin to make it easier
  for services to add their agent notifiers to the core plugin

Implements blueprint lbaas-agent-scheduler
Change-Id: Id98649fd5c7873dcd5be1a2b117b8bed25f06cc2
2013-07-19 13:25:04 +04:00

517 lines
23 KiB
Python

# 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 q_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 extraroute_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.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 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__)
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
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 = db.get_port_from_device(device[cls.TAP_PREFIX_LEN:])
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 = 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
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')
LOG.debug(_("Device %(device)s no longer exists on %(agent_id)s"),
{'device': device, 'agent_id': agent_id})
port = self.get_port_from_device(device)
if port:
entry = {'device': device,
'exists': True}
if 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
def update_device_up(self, rpc_context, **kwargs):
"""Device is up on agent."""
agent_id = kwargs.get('agent_id')
device = kwargs.get('device')
LOG.debug(_("Device %(device)s up %(agent_id)s"),
{'device': device, 'agent_id': agent_id})
port = self.get_port_from_device(device)
if port:
if port['status'] != q_const.PORT_STATUS_ACTIVE:
# Set port status to ACTIVE
db.set_port_status(port['id'], q_const.PORT_STATUS_ACTIVE)
else:
LOG.debug(_("%s can not be found in database"), device)
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'
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)
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, 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)
class LinuxBridgePluginV2(db_base_plugin_v2.NeutronDbPluginV2,
extraroute_db.ExtraRoute_db_mixin,
l3_gwmode_db.L3_NAT_db_mixin,
sg_db_rpc.SecurityGroupServerRpcMixin,
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", "router", "ext-gw-mode",
"binding", "quotas", "security-group",
"agent", "extraroute",
"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):
self.extra_binding_dict = {
portbindings.VIF_TYPE: portbindings.VIF_TYPE_BRIDGE,
portbindings.CAPABILITIES: {
portbindings.CAP_PORT_FILTER:
'security-group' in self.supported_extension_aliases}}
db.initialize()
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 [constants.TYPE_LOCAL,
constants.TYPE_VLAN,
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"))
def _setup_rpc(self):
# RPC support
self.topic = topics.PLUGIN
self.conn = rpc.create_connection(new=True)
self.callbacks = LinuxBridgeRpcCallbacks()
self.dispatcher = self.callbacks.create_rpc_dispatcher()
self.conn.create_consumer(self.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
)
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)
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))
def _add_network(self, physical_network):
if physical_network not in self.network_vlan_ranges:
self.network_vlan_ranges[physical_network] = []
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] = 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] = constants.TYPE_LOCAL
network[provider.PHYSICAL_NETWORK] = None
network[provider.SEGMENTATION_ID] = None
else:
network[provider.NETWORK_TYPE] = constants.TYPE_VLAN
network[provider.PHYSICAL_NETWORK] = binding.physical_network
network[provider.SEGMENTATION_ID] = binding.vlan_id
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 q_exc.InvalidInput(error_message=msg)
elif network_type == constants.TYPE_FLAT:
if segmentation_id_set:
msg = _("provider:segmentation_id specified for flat network")
raise q_exc.InvalidInput(error_message=msg)
else:
segmentation_id = constants.FLAT_VLAN_ID
elif network_type == constants.TYPE_VLAN:
if not segmentation_id_set:
msg = _("provider:segmentation_id required")
raise q_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 q_exc.InvalidInput(error_message=msg)
elif network_type == constants.TYPE_LOCAL:
if physical_network_set:
msg = _("provider:physical_network specified for local "
"network")
raise q_exc.InvalidInput(error_message=msg)
else:
physical_network = None
if segmentation_id_set:
msg = _("provider:segmentation_id specified for local "
"network")
raise q_exc.InvalidInput(error_message=msg)
else:
segmentation_id = constants.LOCAL_VLAN_ID
else:
msg = _("provider:network_type %s not supported") % network_type
raise q_exc.InvalidInput(error_message=msg)
if network_type in [constants.TYPE_VLAN, 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 q_exc.InvalidInput(error_message=msg)
elif 'default' in self.network_vlan_ranges:
physical_network = 'default'
else:
msg = _("provider:physical_network required")
raise q_exc.InvalidInput(error_message=msg)
return (network_type, physical_network, segmentation_id)
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 == constants.TYPE_NONE:
raise q_exc.TenantNetworksDisabled()
elif network_type == 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 [constants.TYPE_VLAN, 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
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
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)
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)
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]
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
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
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)
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)