506 lines
20 KiB
Python
506 lines
20 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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#
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# Copyright 2013 Brocade Communications System, Inc.
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# All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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#
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# Authors:
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# Shiv Haris (sharis@brocade.com)
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# Varma Bhupatiraju (vbhupati@#brocade.com)
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#
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# (Some parts adapted from LinuxBridge Plugin)
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# TODO(shiv) need support for security groups
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"""Implentation of Brocade Neutron Plugin."""
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from oslo.config import cfg
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from neutron.agent import securitygroups_rpc as sg_rpc
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from neutron.api.rpc.agentnotifiers import dhcp_rpc_agent_api
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from neutron.api.rpc.agentnotifiers import l3_rpc_agent_api
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from neutron.common import constants as q_const
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from neutron.common import rpc as q_rpc
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from neutron.common import topics
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from neutron.common import utils
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from neutron.db import agents_db
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from neutron.db import agentschedulers_db
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from neutron.db import api as db
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from neutron.db import db_base_plugin_v2
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from neutron.db import dhcp_rpc_base
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from neutron.db import external_net_db
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from neutron.db import extraroute_db
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from neutron.db import l3_agentschedulers_db
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from neutron.db import l3_rpc_base
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from neutron.db import portbindings_base
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from neutron.db import securitygroups_rpc_base as sg_db_rpc
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from neutron.extensions import portbindings
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from neutron.extensions import securitygroup as ext_sg
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from neutron.openstack.common import context
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from neutron.openstack.common import importutils
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from neutron.openstack.common import log as logging
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from neutron.openstack.common import rpc
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from neutron.openstack.common.rpc import proxy
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from neutron.plugins.brocade.db import models as brocade_db
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from neutron.plugins.brocade import vlanbm as vbm
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from neutron.plugins.common import constants as svc_constants
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LOG = logging.getLogger(__name__)
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PLUGIN_VERSION = 0.88
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AGENT_OWNER_PREFIX = "network:"
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NOS_DRIVER = 'neutron.plugins.brocade.nos.nosdriver.NOSdriver'
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SWITCH_OPTS = [cfg.StrOpt('address', default='',
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help=_('The address of the host to SSH to')),
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cfg.StrOpt('username', default='',
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help=_('The SSH username to use')),
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cfg.StrOpt('password', default='', secret=True,
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help=_('The SSH password to use')),
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cfg.StrOpt('ostype', default='NOS',
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help=_('Currently unused'))
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]
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PHYSICAL_INTERFACE_OPTS = [cfg.StrOpt('physical_interface', default='eth0',
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help=_('The network interface to use when creating'
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'a port'))
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]
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cfg.CONF.register_opts(SWITCH_OPTS, "SWITCH")
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cfg.CONF.register_opts(PHYSICAL_INTERFACE_OPTS, "PHYSICAL_INTERFACE")
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class BridgeRpcCallbacks(dhcp_rpc_base.DhcpRpcCallbackMixin,
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l3_rpc_base.L3RpcCallbackMixin,
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sg_db_rpc.SecurityGroupServerRpcCallbackMixin):
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"""Agent callback."""
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RPC_API_VERSION = '1.1'
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# Device names start with "tap"
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# history
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# 1.1 Support Security Group RPC
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TAP_PREFIX_LEN = 3
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def create_rpc_dispatcher(self):
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"""Get the rpc dispatcher for this manager.
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If a manager would like to set an rpc API version, or support more than
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one class as the target of rpc messages, override this method.
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"""
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return q_rpc.PluginRpcDispatcher([self,
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agents_db.AgentExtRpcCallback()])
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@classmethod
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def get_port_from_device(cls, device):
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"""Get port from the brocade specific db."""
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# TODO(shh) context is not being passed as
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# an argument to this function;
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#
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# need to be fixed in:
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# file: neutron/db/securtygroups_rpc_base.py
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# function: securitygroup_rules_for_devices()
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# which needs to pass context to us
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# Doing what other plugins are doing
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session = db.get_session()
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port = brocade_db.get_port_from_device(
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session, device[cls.TAP_PREFIX_LEN:])
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# TODO(shiv): need to extend the db model to include device owners
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# make it appears that the device owner is of type network
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if port:
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port['device'] = device
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port['device_owner'] = AGENT_OWNER_PREFIX
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port['binding:vif_type'] = 'bridge'
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return port
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def get_device_details(self, rpc_context, **kwargs):
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"""Agent requests device details."""
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agent_id = kwargs.get('agent_id')
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device = kwargs.get('device')
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LOG.debug(_("Device %(device)s details requested from %(agent_id)s"),
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{'device': device, 'agent_id': agent_id})
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port = brocade_db.get_port(rpc_context, device[self.TAP_PREFIX_LEN:])
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if port:
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entry = {'device': device,
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'vlan_id': port.vlan_id,
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'network_id': port.network_id,
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'port_id': port.port_id,
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'physical_network': port.physical_interface,
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'admin_state_up': port.admin_state_up
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}
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else:
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entry = {'device': device}
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LOG.debug(_("%s can not be found in database"), device)
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return entry
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def update_device_down(self, rpc_context, **kwargs):
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"""Device no longer exists on agent."""
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device = kwargs.get('device')
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port = self.get_port_from_device(device)
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if port:
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entry = {'device': device,
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'exists': True}
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# Set port status to DOWN
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port_id = port['port_id']
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brocade_db.update_port_state(rpc_context, port_id, False)
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else:
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entry = {'device': device,
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'exists': False}
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LOG.debug(_("%s can not be found in database"), device)
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return entry
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class AgentNotifierApi(proxy.RpcProxy,
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sg_rpc.SecurityGroupAgentRpcApiMixin):
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"""Agent side of the linux bridge rpc API.
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API version history:
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1.0 - Initial version.
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1.1 - Added get_active_networks_info, create_dhcp_port,
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and update_dhcp_port methods.
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"""
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BASE_RPC_API_VERSION = '1.1'
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def __init__(self, topic):
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super(AgentNotifierApi, self).__init__(
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topic=topic, default_version=self.BASE_RPC_API_VERSION)
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self.topic = topic
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self.topic_network_delete = topics.get_topic_name(topic,
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topics.NETWORK,
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topics.DELETE)
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self.topic_port_update = topics.get_topic_name(topic,
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topics.PORT,
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topics.UPDATE)
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def network_delete(self, context, network_id):
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self.fanout_cast(context,
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self.make_msg('network_delete',
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network_id=network_id),
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topic=self.topic_network_delete)
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def port_update(self, context, port, physical_network, vlan_id):
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self.fanout_cast(context,
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self.make_msg('port_update',
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port=port,
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physical_network=physical_network,
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vlan_id=vlan_id),
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topic=self.topic_port_update)
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class BrocadePluginV2(db_base_plugin_v2.NeutronDbPluginV2,
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external_net_db.External_net_db_mixin,
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extraroute_db.ExtraRoute_db_mixin,
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sg_db_rpc.SecurityGroupServerRpcMixin,
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l3_agentschedulers_db.L3AgentSchedulerDbMixin,
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agentschedulers_db.DhcpAgentSchedulerDbMixin,
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portbindings_base.PortBindingBaseMixin):
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"""BrocadePluginV2 is a Neutron plugin.
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Provides L2 Virtual Network functionality using VDX. Upper
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layer driver class that interfaces to NETCONF layer below.
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"""
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def __init__(self):
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"""Initialize Brocade Plugin.
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Specify switch address and db configuration.
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"""
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self.supported_extension_aliases = ["binding", "security-group",
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"external-net", "router",
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"extraroute", "agent",
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"l3_agent_scheduler",
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"dhcp_agent_scheduler"]
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self.physical_interface = (cfg.CONF.PHYSICAL_INTERFACE.
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physical_interface)
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self.base_binding_dict = self._get_base_binding_dict()
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portbindings_base.register_port_dict_function()
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db.configure_db()
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self.ctxt = context.get_admin_context()
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self.ctxt.session = db.get_session()
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self._vlan_bitmap = vbm.VlanBitmap(self.ctxt)
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self._setup_rpc()
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self.network_scheduler = importutils.import_object(
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cfg.CONF.network_scheduler_driver
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)
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self.router_scheduler = importutils.import_object(
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cfg.CONF.router_scheduler_driver
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)
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self.brocade_init()
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def brocade_init(self):
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"""Brocade specific initialization."""
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self._switch = {'address': cfg.CONF.SWITCH.address,
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'username': cfg.CONF.SWITCH.username,
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'password': cfg.CONF.SWITCH.password
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}
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self._driver = importutils.import_object(NOS_DRIVER)
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def _setup_rpc(self):
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# RPC support
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self.service_topics = {svc_constants.CORE: topics.PLUGIN,
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svc_constants.L3_ROUTER_NAT: topics.L3PLUGIN}
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self.rpc_context = context.RequestContext('neutron', 'neutron',
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is_admin=False)
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self.conn = rpc.create_connection(new=True)
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self.callbacks = BridgeRpcCallbacks()
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self.dispatcher = self.callbacks.create_rpc_dispatcher()
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for svc_topic in self.service_topics.values():
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self.conn.create_consumer(svc_topic, self.dispatcher, fanout=False)
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# Consume from all consumers in a thread
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self.conn.consume_in_thread()
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self.notifier = AgentNotifierApi(topics.AGENT)
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self.agent_notifiers[q_const.AGENT_TYPE_DHCP] = (
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dhcp_rpc_agent_api.DhcpAgentNotifyAPI()
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)
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self.agent_notifiers[q_const.AGENT_TYPE_L3] = (
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l3_rpc_agent_api.L3AgentNotify
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)
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def create_network(self, context, network):
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"""Create network.
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This call to create network translates to creation of port-profile on
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the physical switch.
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"""
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with context.session.begin(subtransactions=True):
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net = super(BrocadePluginV2, self).create_network(context, network)
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net_uuid = net['id']
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vlan_id = self._vlan_bitmap.get_next_vlan(None)
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switch = self._switch
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try:
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self._driver.create_network(switch['address'],
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switch['username'],
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switch['password'],
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vlan_id)
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except Exception:
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# Proper formatting
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LOG.exception(_("Brocade NOS driver error"))
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LOG.debug(_("Returning the allocated vlan (%d) to the pool"),
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vlan_id)
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self._vlan_bitmap.release_vlan(int(vlan_id))
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raise Exception(_("Brocade plugin raised exception, "
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"check logs"))
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brocade_db.create_network(context, net_uuid, vlan_id)
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self._process_l3_create(context, net, network['network'])
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LOG.info(_("Allocated vlan (%d) from the pool"), vlan_id)
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return net
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def delete_network(self, context, net_id):
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"""Delete network.
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This call to delete the network translates to removing the
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port-profile on the physical switch.
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"""
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with context.session.begin(subtransactions=True):
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result = super(BrocadePluginV2, self).delete_network(context,
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net_id)
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# we must delete all ports in db first (foreign key constraint)
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# there is no need to delete port in the driver (its a no-op)
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# (actually: note there is no such call to the driver)
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bports = brocade_db.get_ports(context, net_id)
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for bport in bports:
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brocade_db.delete_port(context, bport['port_id'])
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# find the vlan for this network
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net = brocade_db.get_network(context, net_id)
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vlan_id = net['vlan']
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# Tell hw to do remove PP
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switch = self._switch
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try:
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self._driver.delete_network(switch['address'],
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switch['username'],
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switch['password'],
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vlan_id)
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except Exception:
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# Proper formatting
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LOG.exception(_("Brocade NOS driver error"))
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raise Exception(_("Brocade plugin raised exception, "
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"check logs"))
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# now ok to delete the network
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brocade_db.delete_network(context, net_id)
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# relinquish vlan in bitmap
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self._vlan_bitmap.release_vlan(int(vlan_id))
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return result
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def update_network(self, context, id, network):
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session = context.session
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with session.begin(subtransactions=True):
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net = super(BrocadePluginV2, self).update_network(context, id,
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network)
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self._process_l3_update(context, net, network['network'])
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return net
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def create_port(self, context, port):
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"""Create logical port on the switch."""
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tenant_id = port['port']['tenant_id']
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network_id = port['port']['network_id']
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admin_state_up = port['port']['admin_state_up']
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physical_interface = self.physical_interface
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with context.session.begin(subtransactions=True):
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bnet = brocade_db.get_network(context, network_id)
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vlan_id = bnet['vlan']
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neutron_port = super(BrocadePluginV2, self).create_port(context,
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port)
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self._process_portbindings_create_and_update(context,
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port['port'],
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neutron_port)
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interface_mac = neutron_port['mac_address']
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port_id = neutron_port['id']
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switch = self._switch
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# convert mac format: xx:xx:xx:xx:xx:xx -> xxxx.xxxx.xxxx
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mac = self.mac_reformat_62to34(interface_mac)
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try:
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self._driver.associate_mac_to_network(switch['address'],
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switch['username'],
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switch['password'],
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vlan_id,
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mac)
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except Exception:
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# Proper formatting
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LOG.exception(_("Brocade NOS driver error"))
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raise Exception(_("Brocade plugin raised exception, "
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"check logs"))
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# save to brocade persistent db
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brocade_db.create_port(context, port_id, network_id,
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physical_interface,
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vlan_id, tenant_id, admin_state_up)
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# apply any extensions
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return neutron_port
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def delete_port(self, context, port_id):
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with context.session.begin(subtransactions=True):
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neutron_port = self.get_port(context, port_id)
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interface_mac = neutron_port['mac_address']
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# convert mac format: xx:xx:xx:xx:xx:xx -> xxxx.xxxx.xxxx
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mac = self.mac_reformat_62to34(interface_mac)
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brocade_port = brocade_db.get_port(context, port_id)
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vlan_id = brocade_port['vlan_id']
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switch = self._switch
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try:
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self._driver.dissociate_mac_from_network(switch['address'],
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switch['username'],
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switch['password'],
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vlan_id,
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mac)
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except Exception:
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LOG.exception(_("Brocade NOS driver error"))
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raise Exception(
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_("Brocade plugin raised exception, check logs"))
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super(BrocadePluginV2, self).delete_port(context, port_id)
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brocade_db.delete_port(context, port_id)
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def update_port(self, context, port_id, port):
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original_port = self.get_port(context, port_id)
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session = context.session
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port_updated = False
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with session.begin(subtransactions=True):
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# delete the port binding and read it with the new rules
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if ext_sg.SECURITYGROUPS in port['port']:
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port['port'][ext_sg.SECURITYGROUPS] = (
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self._get_security_groups_on_port(context, port))
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self._delete_port_security_group_bindings(context, port_id)
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# process_port_create_security_group also needs port id
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port['port']['id'] = port_id
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self._process_port_create_security_group(
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context,
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port['port'],
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port['port'][ext_sg.SECURITYGROUPS])
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port_updated = True
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port_data = port['port']
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port = super(BrocadePluginV2, self).update_port(
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context, port_id, port)
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self._process_portbindings_create_and_update(context,
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port_data,
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port)
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if original_port['admin_state_up'] != port['admin_state_up']:
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port_updated = True
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if (original_port['fixed_ips'] != port['fixed_ips'] or
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not utils.compare_elements(
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original_port.get(ext_sg.SECURITYGROUPS),
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port.get(ext_sg.SECURITYGROUPS))):
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self.notifier.security_groups_member_updated(
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context, port.get(ext_sg.SECURITYGROUPS))
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if port_updated:
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self._notify_port_updated(context, port)
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return port
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def _notify_port_updated(self, context, port):
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port_id = port['id']
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bport = brocade_db.get_port(context, port_id)
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self.notifier.port_update(context, port,
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bport.physical_interface,
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bport.vlan_id)
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def _get_base_binding_dict(self):
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binding = {
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portbindings.VIF_TYPE: portbindings.VIF_TYPE_BRIDGE,
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portbindings.CAPABILITIES: {
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portbindings.CAP_PORT_FILTER:
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'security-group' in self.supported_extension_aliases}}
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return binding
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def get_plugin_version(self):
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"""Get version number of the plugin."""
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return PLUGIN_VERSION
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@staticmethod
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def mac_reformat_62to34(interface_mac):
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"""Transform MAC address format.
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Transforms from 6 groups of 2 hexadecimal numbers delimited by ":"
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to 3 groups of 4 hexadecimals numbers delimited by ".".
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:param interface_mac: MAC address in the format xx:xx:xx:xx:xx:xx
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:type interface_mac: string
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:returns: MAC address in the format xxxx.xxxx.xxxx
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:rtype: string
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"""
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mac = interface_mac.replace(":", "")
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mac = mac[0:4] + "." + mac[4:8] + "." + mac[8:12]
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return mac
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