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OpenStack Study: linuxbridge_neutron_agent.py**** CubicPower OpenStack Study ****
# vim: tabstop=4 shiftwidth=4 softtabstop=4 # # Copyright 2012 Cisco Systems, 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. # # # Performs per host Linux Bridge configuration for Neutron. # Based on the structure of the OpenVSwitch agent in the # Neutron OpenVSwitch Plugin. # @author: Sumit Naiksatam, Cisco Systems, Inc. import os import sys import time import eventlet from oslo.config import cfg from neutron.agent import l2population_rpc as l2pop_rpc from neutron.agent.linux import ip_lib from neutron.agent.linux import utils from neutron.agent import rpc as agent_rpc from neutron.agent import securitygroups_rpc as sg_rpc from neutron.common import config as logging_config from neutron.common import constants from neutron.common import exceptions from neutron.common import topics from neutron.common import utils as q_utils from neutron import context from neutron.openstack.common import log as logging from neutron.openstack.common import loopingcall from neutron.openstack.common.rpc import common as rpc_common from neutron.openstack.common.rpc import dispatcher from neutron.plugins.common import constants as p_const from neutron.plugins.linuxbridge.common import config # noqa from neutron.plugins.linuxbridge.common import constants as lconst LOG = logging.getLogger(__name__) BRIDGE_NAME_PREFIX = "brq" TAP_INTERFACE_PREFIX = "tap" BRIDGE_FS = "/sys/devices/virtual/net/" BRIDGE_NAME_PLACEHOLDER = "bridge_name" BRIDGE_INTERFACES_FS = BRIDGE_FS + BRIDGE_NAME_PLACEHOLDER + "/brif/" DEVICE_NAME_PLACEHOLDER = "device_name" BRIDGE_PORT_FS_FOR_DEVICE = BRIDGE_FS + DEVICE_NAME_PLACEHOLDER + "/brport" VXLAN_INTERFACE_PREFIX = "vxlan-"
**** CubicPower OpenStack Study **** class NetworkSegment:
**** CubicPower OpenStack Study **** def __init__(self, network_type, physical_network, segmentation_id): self.network_type = network_type self.physical_network = physical_network self.segmentation_id = segmentation_id
**** CubicPower OpenStack Study **** class LinuxBridgeManager:
**** CubicPower OpenStack Study **** def __init__(self, interface_mappings, root_helper): self.interface_mappings = interface_mappings self.root_helper = root_helper self.ip = ip_lib.IPWrapper(self.root_helper) # VXLAN related parameters: self.local_ip = cfg.CONF.VXLAN.local_ip self.vxlan_mode = lconst.VXLAN_NONE if cfg.CONF.VXLAN.enable_vxlan: self.local_int = self.get_interface_by_ip(self.local_ip) if self.local_int: self.check_vxlan_support() else: LOG.warning(_('VXLAN is enabled, a valid local_ip ' 'must be provided')) # Store network mapping to segments self.network_map = {}
**** CubicPower OpenStack Study **** def device_exists(self, device): """Check if ethernet device exists.""" try: utils.execute(['ip', 'link', 'show', 'dev', device], root_helper=self.root_helper) except RuntimeError: return False return True
**** CubicPower OpenStack Study **** def interface_exists_on_bridge(self, bridge, interface): directory = '/sys/class/net/%s/brif' % bridge for filename in os.listdir(directory): if filename == interface: return True return False
**** CubicPower OpenStack Study **** def get_bridge_name(self, network_id): if not network_id: LOG.warning(_("Invalid Network ID, will lead to incorrect bridge" "name")) bridge_name = BRIDGE_NAME_PREFIX + network_id[0:11] return bridge_name
**** CubicPower OpenStack Study **** def get_subinterface_name(self, physical_interface, vlan_id): if not vlan_id: LOG.warning(_("Invalid VLAN ID, will lead to incorrect " "subinterface name")) subinterface_name = '%s.%s' % (physical_interface, vlan_id) return subinterface_name
**** CubicPower OpenStack Study **** def get_tap_device_name(self, interface_id): if not interface_id: LOG.warning(_("Invalid Interface ID, will lead to incorrect " "tap device name")) tap_device_name = TAP_INTERFACE_PREFIX + interface_id[0:11] return tap_device_name
**** CubicPower OpenStack Study **** def get_vxlan_device_name(self, segmentation_id): if 0 <= int(segmentation_id) <= constants.MAX_VXLAN_VNI: return VXLAN_INTERFACE_PREFIX + str(segmentation_id) else: LOG.warning(_("Invalid Segmentation ID: %s, will lead to " "incorrect vxlan device name"), segmentation_id)
**** CubicPower OpenStack Study **** def get_all_neutron_bridges(self): neutron_bridge_list = [] bridge_list = os.listdir(BRIDGE_FS) for bridge in bridge_list: if bridge.startswith(BRIDGE_NAME_PREFIX): neutron_bridge_list.append(bridge) return neutron_bridge_list
**** CubicPower OpenStack Study **** def get_interfaces_on_bridge(self, bridge_name): if self.device_exists(bridge_name): bridge_interface_path = BRIDGE_INTERFACES_FS.replace( BRIDGE_NAME_PLACEHOLDER, bridge_name) return os.listdir(bridge_interface_path)
**** CubicPower OpenStack Study **** def get_tap_devices_count(self, bridge_name): bridge_interface_path = BRIDGE_INTERFACES_FS.replace( BRIDGE_NAME_PLACEHOLDER, bridge_name) try: if_list = os.listdir(bridge_interface_path) return len([interface for interface in if_list if interface.startswith(TAP_INTERFACE_PREFIX)]) except OSError: return 0
**** CubicPower OpenStack Study **** def get_interface_by_ip(self, ip): for device in self.ip.get_devices(): if device.addr.list(to=ip): return device.name
**** CubicPower OpenStack Study **** def get_bridge_for_tap_device(self, tap_device_name): bridges = self.get_all_neutron_bridges() for bridge in bridges: interfaces = self.get_interfaces_on_bridge(bridge) if tap_device_name in interfaces: return bridge return None
**** CubicPower OpenStack Study **** def is_device_on_bridge(self, device_name): if not device_name: return False else: bridge_port_path = BRIDGE_PORT_FS_FOR_DEVICE.replace( DEVICE_NAME_PLACEHOLDER, device_name) return os.path.exists(bridge_port_path)
**** CubicPower OpenStack Study **** def ensure_vlan_bridge(self, network_id, physical_interface, vlan_id): """Create a vlan and bridge unless they already exist.""" interface = self.ensure_vlan(physical_interface, vlan_id) bridge_name = self.get_bridge_name(network_id) ips, gateway = self.get_interface_details(interface) if self.ensure_bridge(bridge_name, interface, ips, gateway): return interface
**** CubicPower OpenStack Study **** def ensure_vxlan_bridge(self, network_id, segmentation_id): """Create a vxlan and bridge unless they already exist.""" interface = self.ensure_vxlan(segmentation_id) if not interface: LOG.error(_("Failed creating vxlan interface for " "%(segmentation_id)s"), {segmentation_id: segmentation_id}) return bridge_name = self.get_bridge_name(network_id) self.ensure_bridge(bridge_name, interface) return interface
**** CubicPower OpenStack Study **** def get_interface_details(self, interface): device = self.ip.device(interface) ips = device.addr.list(scope='global') # Update default gateway if necessary gateway = device.route.get_gateway(scope='global') return ips, gateway
**** CubicPower OpenStack Study **** def ensure_flat_bridge(self, network_id, physical_interface): """Create a non-vlan bridge unless it already exists.""" bridge_name = self.get_bridge_name(network_id) ips, gateway = self.get_interface_details(physical_interface) if self.ensure_bridge(bridge_name, physical_interface, ips, gateway): return physical_interface
**** CubicPower OpenStack Study **** def ensure_local_bridge(self, network_id): """Create a local bridge unless it already exists.""" bridge_name = self.get_bridge_name(network_id) return self.ensure_bridge(bridge_name)
**** CubicPower OpenStack Study **** def ensure_vlan(self, physical_interface, vlan_id): """Create a vlan unless it already exists.""" interface = self.get_subinterface_name(physical_interface, vlan_id) if not self.device_exists(interface): LOG.debug(_("Creating subinterface %(interface)s for " "VLAN %(vlan_id)s on interface " "%(physical_interface)s"), {'interface': interface, 'vlan_id': vlan_id, 'physical_interface': physical_interface}) if utils.execute(['ip', 'link', 'add', 'link', physical_interface, 'name', interface, 'type', 'vlan', 'id', vlan_id], root_helper=self.root_helper): return if utils.execute(['ip', 'link', 'set', interface, 'up'], root_helper=self.root_helper): return LOG.debug(_("Done creating subinterface %s"), interface) return interface
**** CubicPower OpenStack Study **** def ensure_vxlan(self, segmentation_id): """Create a vxlan unless it already exists.""" interface = self.get_vxlan_device_name(segmentation_id) if not self.device_exists(interface): LOG.debug(_("Creating vxlan interface %(interface)s for " "VNI %(segmentation_id)s"), {'interface': interface, 'segmentation_id': segmentation_id}) args = {'dev': self.local_int} if self.vxlan_mode == lconst.VXLAN_MCAST: args['group'] = cfg.CONF.VXLAN.vxlan_group if cfg.CONF.VXLAN.ttl: args['ttl'] = cfg.CONF.VXLAN.ttl if cfg.CONF.VXLAN.tos: args['tos'] = cfg.CONF.VXLAN.tos if cfg.CONF.VXLAN.l2_population: args['proxy'] = True int_vxlan = self.ip.add_vxlan(interface, segmentation_id, **args) int_vxlan.link.set_up() LOG.debug(_("Done creating vxlan interface %s"), interface) return interface
**** CubicPower OpenStack Study **** def update_interface_ip_details(self, destination, source, ips, gateway): if ips or gateway: dst_device = self.ip.device(destination) src_device = self.ip.device(source) # Append IP's to bridge if necessary if ips: for ip in ips: dst_device.addr.add(ip_version=ip['ip_version'], cidr=ip['cidr'], broadcast=ip['broadcast']) if gateway: # Ensure that the gateway can be updated by changing the metric metric = 100 if 'metric' in gateway: metric = gateway['metric'] - 1 dst_device.route.add_gateway(gateway=gateway['gateway'], metric=metric) src_device.route.delete_gateway(gateway=gateway['gateway']) # Remove IP's from interface if ips: for ip in ips: src_device.addr.delete(ip_version=ip['ip_version'], cidr=ip['cidr'])
**** CubicPower OpenStack Study **** def ensure_bridge(self, bridge_name, interface=None, ips=None, gateway=None): """Create a bridge unless it already exists.""" if not self.device_exists(bridge_name): LOG.debug(_("Starting bridge %(bridge_name)s for subinterface " "%(interface)s"), {'bridge_name': bridge_name, 'interface': interface}) if utils.execute(['brctl', 'addbr', bridge_name], root_helper=self.root_helper): return if utils.execute(['brctl', 'setfd', bridge_name, str(0)], root_helper=self.root_helper): return if utils.execute(['brctl', 'stp', bridge_name, 'off'], root_helper=self.root_helper): return if utils.execute(['ip', 'link', 'set', bridge_name, 'up'], root_helper=self.root_helper): return LOG.debug(_("Done starting bridge %(bridge_name)s for " "subinterface %(interface)s"), {'bridge_name': bridge_name, 'interface': interface}) if not interface: return bridge_name # Update IP info if necessary self.update_interface_ip_details(bridge_name, interface, ips, gateway) # Check if the interface is part of the bridge if not self.interface_exists_on_bridge(bridge_name, interface): try: # Check if the interface is not enslaved in another bridge if self.is_device_on_bridge(interface): bridge = self.get_bridge_for_tap_device(interface) utils.execute(['brctl', 'delif', bridge, interface], root_helper=self.root_helper) utils.execute(['brctl', 'addif', bridge_name, interface], root_helper=self.root_helper) except Exception as e: LOG.error(_("Unable to add %(interface)s to %(bridge_name)s! " "Exception: %(e)s"), {'interface': interface, 'bridge_name': bridge_name, 'e': e}) return return bridge_name
**** CubicPower OpenStack Study **** def ensure_physical_in_bridge(self, network_id, network_type, physical_network, segmentation_id): if network_type == p_const.TYPE_VXLAN: if self.vxlan_mode == lconst.VXLAN_NONE: LOG.error(_("Unable to add vxlan interface for network %s"), network_id) return return self.ensure_vxlan_bridge(network_id, segmentation_id) physical_interface = self.interface_mappings.get(physical_network) if not physical_interface: LOG.error(_("No mapping for physical network %s"), physical_network) return if network_type == p_const.TYPE_FLAT: return self.ensure_flat_bridge(network_id, physical_interface) elif network_type == p_const.TYPE_VLAN: return self.ensure_vlan_bridge(network_id, physical_interface, segmentation_id) else: LOG.error(_("Unknown network_type %(network_type)s for network " "%(network_id)s."), {network_type: network_type, network_id: network_id})
**** CubicPower OpenStack Study **** def add_tap_interface(self, network_id, network_type, physical_network, segmentation_id, tap_device_name): """Add tap interface. If a VIF has been plugged into a network, this function will add the corresponding tap device to the relevant bridge. """ if not self.device_exists(tap_device_name): LOG.debug(_("Tap device: %s does not exist on " "this host, skipped"), tap_device_name) return False bridge_name = self.get_bridge_name(network_id) if network_type == p_const.TYPE_LOCAL: self.ensure_local_bridge(network_id) elif not self.ensure_physical_in_bridge(network_id, network_type, physical_network, segmentation_id): return False # Check if device needs to be added to bridge tap_device_in_bridge = self.get_bridge_for_tap_device(tap_device_name) if not tap_device_in_bridge: data = {'tap_device_name': tap_device_name, 'bridge_name': bridge_name} msg = _("Adding device %(tap_device_name)s to bridge " "%(bridge_name)s") % data LOG.debug(msg) if utils.execute(['brctl', 'addif', bridge_name, tap_device_name], root_helper=self.root_helper): return False else: data = {'tap_device_name': tap_device_name, 'bridge_name': bridge_name} msg = _("%(tap_device_name)s already exists on bridge " "%(bridge_name)s") % data LOG.debug(msg) return True
**** CubicPower OpenStack Study **** def add_interface(self, network_id, network_type, physical_network, segmentation_id, port_id): self.network_map[network_id] = NetworkSegment(network_type, physical_network, segmentation_id) tap_device_name = self.get_tap_device_name(port_id) return self.add_tap_interface(network_id, network_type, physical_network, segmentation_id, tap_device_name)
**** CubicPower OpenStack Study **** def delete_vlan_bridge(self, bridge_name): if self.device_exists(bridge_name): interfaces_on_bridge = self.get_interfaces_on_bridge(bridge_name) for interface in interfaces_on_bridge: self.remove_interface(bridge_name, interface) if interface.startswith(VXLAN_INTERFACE_PREFIX): self.delete_vxlan(interface) continue for physical_interface in self.interface_mappings.itervalues(): if (interface.startswith(physical_interface)): ips, gateway = self.get_interface_details(bridge_name) if ips: # This is a flat network or a VLAN interface that # was setup outside of neutron => return IP's from # bridge to interface self.update_interface_ip_details(interface, bridge_name, ips, gateway) elif physical_interface != interface: self.delete_vlan(interface) LOG.debug(_("Deleting bridge %s"), bridge_name) if utils.execute(['ip', 'link', 'set', bridge_name, 'down'], root_helper=self.root_helper): return if utils.execute(['brctl', 'delbr', bridge_name], root_helper=self.root_helper): return LOG.debug(_("Done deleting bridge %s"), bridge_name) else: LOG.error(_("Cannot delete bridge %s, does not exist"), bridge_name)
**** CubicPower OpenStack Study **** def remove_empty_bridges(self): for network_id in self.network_map.keys(): bridge_name = self.get_bridge_name(network_id) if not self.get_tap_devices_count(bridge_name): self.delete_vlan_bridge(bridge_name) del self.network_map[network_id]
**** CubicPower OpenStack Study **** def remove_interface(self, bridge_name, interface_name): if self.device_exists(bridge_name): if not self.is_device_on_bridge(interface_name): return True LOG.debug(_("Removing device %(interface_name)s from bridge " "%(bridge_name)s"), {'interface_name': interface_name, 'bridge_name': bridge_name}) if utils.execute(['brctl', 'delif', bridge_name, interface_name], root_helper=self.root_helper): return False LOG.debug(_("Done removing device %(interface_name)s from bridge " "%(bridge_name)s"), {'interface_name': interface_name, 'bridge_name': bridge_name}) return True else: LOG.debug(_("Cannot remove device %(interface_name)s bridge " "%(bridge_name)s does not exist"), {'interface_name': interface_name, 'bridge_name': bridge_name}) return False
**** CubicPower OpenStack Study **** def delete_vlan(self, interface): if self.device_exists(interface): LOG.debug(_("Deleting subinterface %s for vlan"), interface) if utils.execute(['ip', 'link', 'set', interface, 'down'], root_helper=self.root_helper): return if utils.execute(['ip', 'link', 'delete', interface], root_helper=self.root_helper): return LOG.debug(_("Done deleting subinterface %s"), interface)
**** CubicPower OpenStack Study **** def delete_vxlan(self, interface): if self.device_exists(interface): LOG.debug(_("Deleting vxlan interface %s for vlan"), interface) int_vxlan = self.ip.device(interface) int_vxlan.link.set_down() int_vxlan.link.delete() LOG.debug(_("Done deleting vxlan interface %s"), interface)
**** CubicPower OpenStack Study **** def update_devices(self, registered_devices): devices = self.get_tap_devices() if devices == registered_devices: return added = devices - registered_devices removed = registered_devices - devices return {'current': devices, 'added': added, 'removed': removed}
**** CubicPower OpenStack Study **** def get_tap_devices(self): devices = set() for device in os.listdir(BRIDGE_FS): if device.startswith(TAP_INTERFACE_PREFIX): devices.add(device) return devices
**** CubicPower OpenStack Study **** def vxlan_ucast_supported(self): if not cfg.CONF.VXLAN.l2_population: return False if not ip_lib.iproute_arg_supported( ['bridge', 'fdb'], 'append', self.root_helper): LOG.warning(_('Option "%(option)s" must be supported by command ' '"%(command)s" to enable %(mode)s mode') % {'option': 'append', 'command': 'bridge fdb', 'mode': 'VXLAN UCAST'}) return False for segmentation_id in range(1, constants.MAX_VXLAN_VNI + 1): if not self.device_exists( self.get_vxlan_device_name(segmentation_id)): break else: LOG.error(_('No valid Segmentation ID to perform UCAST test.')) return False test_iface = self.ensure_vxlan(segmentation_id) try: utils.execute( cmd=['bridge', 'fdb', 'append', constants.FLOODING_ENTRY[0], 'dev', test_iface, 'dst', '1.1.1.1'], root_helper=self.root_helper) return True except RuntimeError: return False finally: self.delete_vxlan(test_iface)
**** CubicPower OpenStack Study **** def vxlan_mcast_supported(self): if not cfg.CONF.VXLAN.vxlan_group: LOG.warning(_('VXLAN muticast group must be provided in ' 'vxlan_group option to enable VXLAN MCAST mode')) return False if not ip_lib.iproute_arg_supported( ['ip', 'link', 'add', 'type', 'vxlan'], 'proxy', self.root_helper): LOG.warning(_('Option "%(option)s" must be supported by command ' '"%(command)s" to enable %(mode)s mode') % {'option': 'proxy', 'command': 'ip link add type vxlan', 'mode': 'VXLAN MCAST'}) return False return True
**** CubicPower OpenStack Study **** def vxlan_module_supported(self): try: utils.execute(cmd=['modinfo', 'vxlan']) return True except RuntimeError: return False
**** CubicPower OpenStack Study **** def check_vxlan_support(self): self.vxlan_mode = lconst.VXLAN_NONE if not self.vxlan_module_supported(): LOG.error(_('Linux kernel vxlan module and iproute2 3.8 or above ' 'are required to enable VXLAN.')) raise exceptions.VxlanNetworkUnsupported() if self.vxlan_ucast_supported(): self.vxlan_mode = lconst.VXLAN_UCAST elif self.vxlan_mcast_supported(): self.vxlan_mode = lconst.VXLAN_MCAST else: raise exceptions.VxlanNetworkUnsupported() LOG.debug(_('Using %s VXLAN mode'), self.vxlan_mode)
**** CubicPower OpenStack Study **** def fdb_ip_entry_exists(self, mac, ip, interface): entries = utils.execute(['ip', 'neigh', 'show', 'to', ip, 'dev', interface], root_helper=self.root_helper) return mac in entries
**** CubicPower OpenStack Study **** def fdb_bridge_entry_exists(self, mac, interface, agent_ip=None): entries = utils.execute(['bridge', 'fdb', 'show', 'dev', interface], root_helper=self.root_helper) if not agent_ip: return mac in entries return (agent_ip in entries and mac in entries)
**** CubicPower OpenStack Study **** def add_fdb_ip_entry(self, mac, ip, interface): utils.execute(['ip', 'neigh', 'replace', ip, 'lladdr', mac, 'dev', interface, 'nud', 'permanent'], root_helper=self.root_helper, check_exit_code=False)
**** CubicPower OpenStack Study **** def remove_fdb_ip_entry(self, mac, ip, interface): utils.execute(['ip', 'neigh', 'del', ip, 'lladdr', mac, 'dev', interface], root_helper=self.root_helper, check_exit_code=False)
**** CubicPower OpenStack Study **** def add_fdb_bridge_entry(self, mac, agent_ip, interface, operation="add"): utils.execute(['bridge', 'fdb', operation, mac, 'dev', interface, 'dst', agent_ip], root_helper=self.root_helper, check_exit_code=False)
**** CubicPower OpenStack Study **** def remove_fdb_bridge_entry(self, mac, agent_ip, interface): utils.execute(['bridge', 'fdb', 'del', mac, 'dev', interface, 'dst', agent_ip], root_helper=self.root_helper, check_exit_code=False)
**** CubicPower OpenStack Study **** def add_fdb_entries(self, agent_ip, ports, interface): for mac, ip in ports: if mac != constants.FLOODING_ENTRY[0]: self.add_fdb_ip_entry(mac, ip, interface) self.add_fdb_bridge_entry(mac, agent_ip, interface) elif self.vxlan_mode == lconst.VXLAN_UCAST: if self.fdb_bridge_entry_exists(mac, interface): self.add_fdb_bridge_entry(mac, agent_ip, interface, "append") else: self.add_fdb_bridge_entry(mac, agent_ip, interface)
**** CubicPower OpenStack Study **** def remove_fdb_entries(self, agent_ip, ports, interface): for mac, ip in ports: if mac != constants.FLOODING_ENTRY[0]: self.remove_fdb_ip_entry(mac, ip, interface) self.remove_fdb_bridge_entry(mac, agent_ip, interface) elif self.vxlan_mode == lconst.VXLAN_UCAST: self.remove_fdb_bridge_entry(mac, agent_ip, interface)
**** CubicPower OpenStack Study **** class LinuxBridgeRpcCallbacks(sg_rpc.SecurityGroupAgentRpcCallbackMixin,
l2pop_rpc.L2populationRpcCallBackMixin): # Set RPC API version to 1.0 by
**** CubicPower OpenStack Study **** def __init__(self, context, agent): self.context = context self.agent = agent self.sg_agent = agent
**** CubicPower OpenStack Study **** def network_delete(self, context, **kwargs): LOG.debug(_("network_delete received")) network_id = kwargs.get('network_id') bridge_name = self.agent.br_mgr.get_bridge_name(network_id) LOG.debug(_("Delete %s"), bridge_name) self.agent.br_mgr.delete_vlan_bridge(bridge_name)
**** CubicPower OpenStack Study **** def port_update(self, context, **kwargs): LOG.debug(_("port_update received")) # Check port exists on node port = kwargs.get('port') tap_device_name = self.agent.br_mgr.get_tap_device_name(port['id']) devices = self.agent.br_mgr.get_tap_devices() if tap_device_name not in devices: return if 'security_groups' in port: self.sg_agent.refresh_firewall() try: if port['admin_state_up']: network_type = kwargs.get('network_type') if network_type: segmentation_id = kwargs.get('segmentation_id') else: # compatibility with pre-Havana RPC vlan_id encoding vlan_id = kwargs.get('vlan_id') (network_type, segmentation_id) = lconst.interpret_vlan_id(vlan_id) physical_network = kwargs.get('physical_network') # create the networking for the port if self.agent.br_mgr.add_interface(port['network_id'], network_type, physical_network, segmentation_id, port['id']): # update plugin about port status self.agent.plugin_rpc.update_device_up(self.context, tap_device_name, self.agent.agent_id, cfg.CONF.host) else: self.agent.plugin_rpc.update_device_down( self.context, tap_device_name, self.agent.agent_id, cfg.CONF.host ) else: bridge_name = self.agent.br_mgr.get_bridge_name( port['network_id']) self.agent.br_mgr.remove_interface(bridge_name, tap_device_name) # update plugin about port status self.agent.plugin_rpc.update_device_down(self.context, tap_device_name, self.agent.agent_id, cfg.CONF.host) except rpc_common.Timeout: LOG.error(_("RPC timeout while updating port %s"), port['id'])
**** CubicPower OpenStack Study **** def fdb_add(self, context, fdb_entries): LOG.debug(_("fdb_add received")) for network_id, values in fdb_entries.items(): segment = self.agent.br_mgr.network_map.get(network_id) if not segment: return if segment.network_type != p_const.TYPE_VXLAN: return interface = self.agent.br_mgr.get_vxlan_device_name( segment.segmentation_id) agent_ports = values.get('ports') for agent_ip, ports in agent_ports.items(): if agent_ip == self.agent.br_mgr.local_ip: continue self.agent.br_mgr.add_fdb_entries(agent_ip, ports, interface)
**** CubicPower OpenStack Study **** def fdb_remove(self, context, fdb_entries): LOG.debug(_("fdb_remove received")) for network_id, values in fdb_entries.items(): segment = self.agent.br_mgr.network_map.get(network_id) if not segment: return if segment.network_type != p_const.TYPE_VXLAN: return interface = self.agent.br_mgr.get_vxlan_device_name( segment.segmentation_id) agent_ports = values.get('ports') for agent_ip, ports in agent_ports.items(): if agent_ip == self.agent.br_mgr.local_ip: continue self.agent.br_mgr.remove_fdb_entries(agent_ip, ports, interface)
**** CubicPower OpenStack Study **** def _fdb_chg_ip(self, context, fdb_entries): LOG.debug(_("update chg_ip received")) for network_id, agent_ports in fdb_entries.items(): segment = self.agent.br_mgr.network_map.get(network_id) if not segment: return if segment.network_type != p_const.TYPE_VXLAN: return interface = self.agent.br_mgr.get_vxlan_device_name( segment.segmentation_id) for agent_ip, state in agent_ports.items(): if agent_ip == self.agent.br_mgr.local_ip: continue after = state.get('after') for mac, ip in after: self.agent.br_mgr.add_fdb_ip_entry(mac, ip, interface) before = state.get('before') for mac, ip in before: self.agent.br_mgr.remove_fdb_ip_entry(mac, ip, interface)
**** CubicPower OpenStack Study **** def fdb_update(self, context, fdb_entries): LOG.debug(_("fdb_update received")) for action, values in fdb_entries.items(): method = '_fdb_' + action if not hasattr(self, method): raise NotImplementedError() getattr(self, method)(context, values)
**** CubicPower OpenStack Study **** def create_rpc_dispatcher(self): '''Get the rpc dispatcher for this manager. If a manager would like to set an rpc API version, or support more than one class as the target of rpc messages, override this method. ''' return dispatcher.RpcDispatcher([self])
**** CubicPower OpenStack Study **** class LinuxBridgePluginApi(agent_rpc.PluginApi,
sg_rpc.SecurityGroupServerRpcApiMixin): pass
**** CubicPower OpenStack Study **** class LinuxBridgeNeutronAgentRPC(sg_rpc.SecurityGroupAgentRpcMixin):
**** CubicPower OpenStack Study **** def __init__(self, interface_mappings, polling_interval, root_helper): self.polling_interval = polling_interval self.root_helper = root_helper self.setup_linux_bridge(interface_mappings) configurations = {'interface_mappings': interface_mappings} if self.br_mgr.vxlan_mode != lconst.VXLAN_NONE: configurations['tunneling_ip'] = self.br_mgr.local_ip configurations['tunnel_types'] = [p_const.TYPE_VXLAN] configurations['l2_population'] = cfg.CONF.VXLAN.l2_population self.agent_state = { 'binary': 'neutron-linuxbridge-agent', 'host': cfg.CONF.host, 'topic': constants.L2_AGENT_TOPIC, 'configurations': configurations, 'agent_type': constants.AGENT_TYPE_LINUXBRIDGE, 'start_flag': True} self.setup_rpc(interface_mappings.values()) self.init_firewall()
**** CubicPower OpenStack Study **** def _report_state(self): try: devices = len(self.br_mgr.get_tap_devices()) self.agent_state.get('configurations')['devices'] = devices self.state_rpc.report_state(self.context, self.agent_state) self.agent_state.pop('start_flag', None) except Exception: LOG.exception(_("Failed reporting state!"))
**** CubicPower OpenStack Study **** def setup_rpc(self, physical_interfaces): if physical_interfaces: mac = utils.get_interface_mac(physical_interfaces[0]) else: devices = ip_lib.IPWrapper(self.root_helper).get_devices(True) if devices: mac = utils.get_interface_mac(devices[0].name) else: LOG.error(_("Unable to obtain MAC address for unique ID. " "Agent terminated!")) exit(1) self.agent_id = '%s%s' % ('lb', (mac.replace(":", ""))) LOG.info(_("RPC agent_id: %s"), self.agent_id) self.topic = topics.AGENT self.plugin_rpc = LinuxBridgePluginApi(topics.PLUGIN) self.state_rpc = agent_rpc.PluginReportStateAPI(topics.PLUGIN) # RPC network init self.context = context.get_admin_context_without_session() # Handle updates from service self.callbacks = LinuxBridgeRpcCallbacks(self.context, self) self.dispatcher = self.callbacks.create_rpc_dispatcher() # Define the listening consumers for the agent consumers = [[topics.PORT, topics.UPDATE], [topics.NETWORK, topics.DELETE], [topics.SECURITY_GROUP, topics.UPDATE]] if cfg.CONF.VXLAN.l2_population: consumers.append([topics.L2POPULATION, topics.UPDATE, cfg.CONF.host]) self.connection = agent_rpc.create_consumers(self.dispatcher, self.topic, consumers) report_interval = cfg.CONF.AGENT.report_interval if report_interval: heartbeat = loopingcall.FixedIntervalLoopingCall( self._report_state) heartbeat.start(interval=report_interval)
**** CubicPower OpenStack Study **** def setup_linux_bridge(self, interface_mappings): self.br_mgr = LinuxBridgeManager(interface_mappings, self.root_helper)
**** CubicPower OpenStack Study **** def remove_port_binding(self, network_id, interface_id): bridge_name = self.br_mgr.get_bridge_name(network_id) tap_device_name = self.br_mgr.get_tap_device_name(interface_id) return self.br_mgr.remove_interface(bridge_name, tap_device_name)
**** CubicPower OpenStack Study **** def process_network_devices(self, device_info): resync_a = False resync_b = False if 'added' in device_info: resync_a = self.treat_devices_added(device_info['added']) if 'removed' in device_info: resync_b = self.treat_devices_removed(device_info['removed']) # If one of the above operations fails => resync with plugin return (resync_a | resync_b)
**** CubicPower OpenStack Study **** def treat_devices_added(self, devices): resync = False self.prepare_devices_filter(devices) for device in devices: LOG.debug(_("Port %s added"), device) try: details = self.plugin_rpc.get_device_details(self.context, device, self.agent_id) except Exception as e: LOG.debug(_("Unable to get port details for " "%(device)s: %(e)s"), {'device': device, 'e': e}) resync = True continue if 'port_id' in details: LOG.info(_("Port %(device)s updated. Details: %(details)s"), {'device': device, 'details': details}) if details['admin_state_up']: # create the networking for the port network_type = details.get('network_type') if network_type: segmentation_id = details.get('segmentation_id') else: # compatibility with pre-Havana RPC vlan_id encoding vlan_id = details.get('vlan_id') (network_type, segmentation_id) = lconst.interpret_vlan_id(vlan_id) if self.br_mgr.add_interface(details['network_id'], network_type, details['physical_network'], segmentation_id, details['port_id']): # update plugin about port status self.plugin_rpc.update_device_up(self.context, device, self.agent_id, cfg.CONF.host) else: self.plugin_rpc.update_device_down(self.context, device, self.agent_id, cfg.CONF.host) else: self.remove_port_binding(details['network_id'], details['port_id']) else: LOG.info(_("Device %s not defined on plugin"), device) return resync
**** CubicPower OpenStack Study **** def treat_devices_removed(self, devices): resync = False self.remove_devices_filter(devices) for device in devices: LOG.info(_("Attachment %s removed"), device) try: details = self.plugin_rpc.update_device_down(self.context, device, self.agent_id, cfg.CONF.host) except Exception as e: LOG.debug(_("port_removed failed for %(device)s: %(e)s"), {'device': device, 'e': e}) resync = True if details['exists']: LOG.info(_("Port %s updated."), device) else: LOG.debug(_("Device %s not defined on plugin"), device) self.br_mgr.remove_empty_bridges() return resync
**** CubicPower OpenStack Study **** def daemon_loop(self): sync = True devices = set() LOG.info(_("LinuxBridge Agent RPC Daemon Started!")) while True: start = time.time() if sync: LOG.info(_("Agent out of sync with plugin!")) devices.clear() sync = False device_info = {} try: device_info = self.br_mgr.update_devices(devices) except Exception: LOG.exception(_("Update devices failed")) sync = True try: # notify plugin about device deltas if device_info: LOG.debug(_("Agent loop has new devices!")) # If treat devices fails - indicates must resync with # plugin sync = self.process_network_devices(device_info) devices = device_info['current'] except Exception: LOG.exception(_("Error in agent loop. Devices info: %s"), device_info) sync = True # sleep till end of polling interval elapsed = (time.time() - start) if (elapsed < self.polling_interval): time.sleep(self.polling_interval - elapsed) else: LOG.debug(_("Loop iteration exceeded interval " "(%(polling_interval)s vs. %(elapsed)s)!"), {'polling_interval': self.polling_interval, 'elapsed': elapsed}) def main(): eventlet.monkey_patch() cfg.CONF(project='neutron') logging_config.setup_logging(cfg.CONF) try: interface_mappings = q_utils.parse_mappings( cfg.CONF.LINUX_BRIDGE.physical_interface_mappings) except ValueError as e: LOG.error(_("Parsing physical_interface_mappings failed: %s." " Agent terminated!"), e) sys.exit(1) LOG.info(_("Interface mappings: %s"), interface_mappings) polling_interval = cfg.CONF.AGENT.polling_interval root_helper = cfg.CONF.AGENT.root_helper agent = LinuxBridgeNeutronAgentRPC(interface_mappings, polling_interval, root_helper) LOG.info(_("Agent initialized successfully, now running... ")) agent.daemon_loop() sys.exit(0) if __name__ == "__main__": main()
**** CubicPower OpenStack Study **** def main(): eventlet.monkey_patch() cfg.CONF(project='neutron') logging_config.setup_logging(cfg.CONF) try: interface_mappings = q_utils.parse_mappings( cfg.CONF.LINUX_BRIDGE.physical_interface_mappings) except ValueError as e: LOG.error(_("Parsing physical_interface_mappings failed: %s." " Agent terminated!"), e) sys.exit(1) LOG.info(_("Interface mappings: %s"), interface_mappings) polling_interval = cfg.CONF.AGENT.polling_interval root_helper = cfg.CONF.AGENT.root_helper agent = LinuxBridgeNeutronAgentRPC(interface_mappings, polling_interval, root_helper) LOG.info(_("Agent initialized successfully, now running... ")) agent.daemon_loop() sys.exit(0) if __name__ == "__main__": main()
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