1517 lines
68 KiB
Python
1517 lines
68 KiB
Python
#!/usr/bin/env python
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# Copyright 2011 VMware, 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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import hashlib
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import signal
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import sys
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import time
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import eventlet
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eventlet.monkey_patch()
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import netaddr
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from oslo.config import cfg
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from six import moves
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from neutron.agent import l2population_rpc
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from neutron.agent.linux import ip_lib
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from neutron.agent.linux import ovs_lib
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from neutron.agent.linux import polling
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from neutron.agent.linux import utils
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from neutron.agent import rpc as agent_rpc
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from neutron.agent import securitygroups_rpc as sg_rpc
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from neutron.common import config as common_config
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from neutron.common import constants as q_const
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from neutron.common import rpc as n_rpc
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from neutron.common import topics
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from neutron.common import utils as q_utils
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from neutron import context
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from neutron.openstack.common import log as logging
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from neutron.openstack.common import loopingcall
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from neutron.plugins.common import constants as p_const
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from neutron.plugins.openvswitch.common import config # noqa
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from neutron.plugins.openvswitch.common import constants
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LOG = logging.getLogger(__name__)
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# A placeholder for dead vlans.
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DEAD_VLAN_TAG = str(q_const.MAX_VLAN_TAG + 1)
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# A class to represent a VIF (i.e., a port that has 'iface-id' and 'vif-mac'
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# attributes set).
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class LocalVLANMapping:
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def __init__(self, vlan, network_type, physical_network, segmentation_id,
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vif_ports=None):
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if vif_ports is None:
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vif_ports = {}
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self.vlan = vlan
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self.network_type = network_type
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self.physical_network = physical_network
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self.segmentation_id = segmentation_id
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self.vif_ports = vif_ports
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# set of tunnel ports on which packets should be flooded
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self.tun_ofports = set()
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def __str__(self):
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return ("lv-id = %s type = %s phys-net = %s phys-id = %s" %
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(self.vlan, self.network_type, self.physical_network,
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self.segmentation_id))
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class OVSPluginApi(agent_rpc.PluginApi,
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sg_rpc.SecurityGroupServerRpcApiMixin):
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pass
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class OVSSecurityGroupAgent(sg_rpc.SecurityGroupAgentRpcMixin):
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def __init__(self, context, plugin_rpc, root_helper):
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self.context = context
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self.plugin_rpc = plugin_rpc
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self.root_helper = root_helper
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self.init_firewall(defer_refresh_firewall=True)
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class OVSNeutronAgent(n_rpc.RpcCallback,
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sg_rpc.SecurityGroupAgentRpcCallbackMixin,
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l2population_rpc.L2populationRpcCallBackMixin):
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'''Implements OVS-based tunneling, VLANs and flat networks.
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Two local bridges are created: an integration bridge (defaults to
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'br-int') and a tunneling bridge (defaults to 'br-tun'). An
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additional bridge is created for each physical network interface
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used for VLANs and/or flat networks.
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All VM VIFs are plugged into the integration bridge. VM VIFs on a
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given virtual network share a common "local" VLAN (i.e. not
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propagated externally). The VLAN id of this local VLAN is mapped
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to the physical networking details realizing that virtual network.
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For virtual networks realized as GRE tunnels, a Logical Switch
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(LS) identifier is used to differentiate tenant traffic on
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inter-HV tunnels. A mesh of tunnels is created to other
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Hypervisors in the cloud. These tunnels originate and terminate on
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the tunneling bridge of each hypervisor. Port patching is done to
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connect local VLANs on the integration bridge to inter-hypervisor
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tunnels on the tunnel bridge.
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For each virtual network realized as a VLAN or flat network, a
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veth is used to connect the local VLAN on the integration bridge
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with the physical network bridge, with flow rules adding,
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modifying, or stripping VLAN tags as necessary.
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'''
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# history
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# 1.0 Initial version
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# 1.1 Support Security Group RPC
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RPC_API_VERSION = '1.1'
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def __init__(self, integ_br, tun_br, local_ip,
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bridge_mappings, root_helper,
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polling_interval, tunnel_types=None,
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veth_mtu=None, l2_population=False,
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minimize_polling=False,
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ovsdb_monitor_respawn_interval=(
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constants.DEFAULT_OVSDBMON_RESPAWN),
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arp_responder=False):
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'''Constructor.
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:param integ_br: name of the integration bridge.
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:param tun_br: name of the tunnel bridge.
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:param local_ip: local IP address of this hypervisor.
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:param bridge_mappings: mappings from physical network name to bridge.
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:param root_helper: utility to use when running shell cmds.
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:param polling_interval: interval (secs) to poll DB.
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:param tunnel_types: A list of tunnel types to enable support for in
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the agent. If set, will automatically set enable_tunneling to
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True.
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:param veth_mtu: MTU size for veth interfaces.
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:param l2_population: Optional, whether L2 population is turned on
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:param minimize_polling: Optional, whether to minimize polling by
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monitoring ovsdb for interface changes.
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:param ovsdb_monitor_respawn_interval: Optional, when using polling
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minimization, the number of seconds to wait before respawning
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the ovsdb monitor.
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:param arp_responder: Optional, enable local ARP responder if it is
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supported.
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'''
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super(OVSNeutronAgent, self).__init__()
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self.veth_mtu = veth_mtu
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self.root_helper = root_helper
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self.available_local_vlans = set(moves.xrange(q_const.MIN_VLAN_TAG,
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q_const.MAX_VLAN_TAG))
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self.tunnel_types = tunnel_types or []
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self.l2_pop = l2_population
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# TODO(ethuleau): Initially, local ARP responder is be dependent to the
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# ML2 l2 population mechanism driver.
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self.arp_responder_enabled = (arp_responder and
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self._check_arp_responder_support() and
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self.l2_pop)
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self.agent_state = {
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'binary': 'neutron-openvswitch-agent',
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'host': cfg.CONF.host,
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'topic': q_const.L2_AGENT_TOPIC,
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'configurations': {'bridge_mappings': bridge_mappings,
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'tunnel_types': self.tunnel_types,
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'tunneling_ip': local_ip,
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'l2_population': self.l2_pop,
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'arp_responder_enabled':
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self.arp_responder_enabled},
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'agent_type': q_const.AGENT_TYPE_OVS,
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'start_flag': True}
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# Keep track of int_br's device count for use by _report_state()
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self.int_br_device_count = 0
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self.int_br = ovs_lib.OVSBridge(integ_br, self.root_helper)
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self.int_br.set_secure_mode()
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# Stores port update notifications for processing in main rpc loop
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self.updated_ports = set()
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self.setup_rpc()
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self.setup_integration_br()
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self.bridge_mappings = bridge_mappings
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self.setup_physical_bridges(self.bridge_mappings)
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self.local_vlan_map = {}
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self.tun_br_ofports = {p_const.TYPE_GRE: {},
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p_const.TYPE_VXLAN: {}}
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self.polling_interval = polling_interval
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self.minimize_polling = minimize_polling
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self.ovsdb_monitor_respawn_interval = ovsdb_monitor_respawn_interval
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if tunnel_types:
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self.enable_tunneling = True
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else:
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self.enable_tunneling = False
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self.local_ip = local_ip
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self.tunnel_count = 0
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self.vxlan_udp_port = cfg.CONF.AGENT.vxlan_udp_port
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self.dont_fragment = cfg.CONF.AGENT.dont_fragment
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self.tun_br = None
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if self.enable_tunneling:
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self.setup_tunnel_br(tun_br)
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# Collect additional bridges to monitor
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self.ancillary_brs = self.setup_ancillary_bridges(integ_br, tun_br)
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# Security group agent support
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self.sg_agent = OVSSecurityGroupAgent(self.context,
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self.plugin_rpc,
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root_helper)
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# Initialize iteration counter
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self.iter_num = 0
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def _check_arp_responder_support(self):
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'''Check if OVS supports to modify ARP headers.
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This functionality is only available since the development branch 2.1.
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'''
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args = ['arp,action=load:0x2->NXM_OF_ARP_OP[],'
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'move:NXM_NX_ARP_SHA[]->NXM_NX_ARP_THA[],'
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'move:NXM_OF_ARP_SPA[]->NXM_OF_ARP_TPA[]']
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supported = ovs_lib.ofctl_arg_supported(self.root_helper, 'add-flow',
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args)
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if not supported:
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LOG.warning(_('OVS version can not support ARP responder.'))
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return supported
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def _report_state(self):
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# How many devices are likely used by a VM
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self.agent_state.get('configurations')['devices'] = (
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self.int_br_device_count)
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try:
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self.state_rpc.report_state(self.context,
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self.agent_state)
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self.agent_state.pop('start_flag', None)
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except Exception:
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LOG.exception(_("Failed reporting state!"))
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def setup_rpc(self):
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self.agent_id = 'ovs-agent-%s' % cfg.CONF.host
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self.topic = topics.AGENT
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self.plugin_rpc = OVSPluginApi(topics.PLUGIN)
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self.state_rpc = agent_rpc.PluginReportStateAPI(topics.PLUGIN)
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# RPC network init
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self.context = context.get_admin_context_without_session()
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# Handle updates from service
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self.endpoints = [self]
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# Define the listening consumers for the agent
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consumers = [[topics.PORT, topics.UPDATE],
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[topics.NETWORK, topics.DELETE],
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[constants.TUNNEL, topics.UPDATE],
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[topics.SECURITY_GROUP, topics.UPDATE]]
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if self.l2_pop:
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consumers.append([topics.L2POPULATION,
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topics.UPDATE, cfg.CONF.host])
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self.connection = agent_rpc.create_consumers(self.endpoints,
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self.topic,
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consumers)
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report_interval = cfg.CONF.AGENT.report_interval
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if report_interval:
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heartbeat = loopingcall.FixedIntervalLoopingCall(
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self._report_state)
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heartbeat.start(interval=report_interval)
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def get_net_uuid(self, vif_id):
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for network_id, vlan_mapping in self.local_vlan_map.iteritems():
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if vif_id in vlan_mapping.vif_ports:
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return network_id
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def network_delete(self, context, **kwargs):
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LOG.debug(_("network_delete received"))
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network_id = kwargs.get('network_id')
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LOG.debug(_("Delete %s"), network_id)
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# The network may not be defined on this agent
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lvm = self.local_vlan_map.get(network_id)
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if lvm:
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self.reclaim_local_vlan(network_id)
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else:
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LOG.debug(_("Network %s not used on agent."), network_id)
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def port_update(self, context, **kwargs):
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port = kwargs.get('port')
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# Put the port identifier in the updated_ports set.
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# Even if full port details might be provided to this call,
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# they are not used since there is no guarantee the notifications
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# are processed in the same order as the relevant API requests
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self.updated_ports.add(port['id'])
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LOG.debug(_("port_update message processed for port %s"), port['id'])
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def tunnel_update(self, context, **kwargs):
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LOG.debug(_("tunnel_update received"))
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if not self.enable_tunneling:
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return
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tunnel_ip = kwargs.get('tunnel_ip')
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tunnel_id = kwargs.get('tunnel_id', self.get_ip_in_hex(tunnel_ip))
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if not tunnel_id:
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return
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tunnel_type = kwargs.get('tunnel_type')
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if not tunnel_type:
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LOG.error(_("No tunnel_type specified, cannot create tunnels"))
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return
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if tunnel_type not in self.tunnel_types:
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LOG.error(_("tunnel_type %s not supported by agent"), tunnel_type)
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return
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if tunnel_ip == self.local_ip:
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return
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tun_name = '%s-%s' % (tunnel_type, tunnel_id)
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if not self.l2_pop:
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self.setup_tunnel_port(tun_name, tunnel_ip, tunnel_type)
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def fdb_add(self, context, fdb_entries):
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LOG.debug(_("fdb_add received"))
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for network_id, values in fdb_entries.items():
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lvm = self.local_vlan_map.get(network_id)
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if not lvm:
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# Agent doesn't manage any port in this network
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continue
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agent_ports = values.get('ports')
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agent_ports.pop(self.local_ip, None)
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if len(agent_ports):
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self.tun_br.defer_apply_on()
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for agent_ip, ports in agent_ports.items():
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# Ensure we have a tunnel port with this remote agent
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ofport = self.tun_br_ofports[
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lvm.network_type].get(agent_ip)
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if not ofport:
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remote_ip_hex = self.get_ip_in_hex(agent_ip)
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if not remote_ip_hex:
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continue
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port_name = '%s-%s' % (lvm.network_type, remote_ip_hex)
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ofport = self.setup_tunnel_port(port_name, agent_ip,
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lvm.network_type)
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if ofport == 0:
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continue
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for port in ports:
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self._add_fdb_flow(port, lvm, ofport)
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self.tun_br.defer_apply_off()
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def fdb_remove(self, context, fdb_entries):
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LOG.debug(_("fdb_remove received"))
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for network_id, values in fdb_entries.items():
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lvm = self.local_vlan_map.get(network_id)
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if not lvm:
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# Agent doesn't manage any more ports in this network
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continue
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agent_ports = values.get('ports')
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agent_ports.pop(self.local_ip, None)
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if len(agent_ports):
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self.tun_br.defer_apply_on()
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for agent_ip, ports in agent_ports.items():
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ofport = self.tun_br_ofports[
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lvm.network_type].get(agent_ip)
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if not ofport:
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continue
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for port in ports:
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self._del_fdb_flow(port, lvm, ofport)
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self.tun_br.defer_apply_off()
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def _add_fdb_flow(self, port_info, lvm, ofport):
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if port_info == q_const.FLOODING_ENTRY:
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lvm.tun_ofports.add(ofport)
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ofports = ','.join(lvm.tun_ofports)
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self.tun_br.mod_flow(table=constants.FLOOD_TO_TUN,
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dl_vlan=lvm.vlan,
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actions="strip_vlan,set_tunnel:%s,"
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"output:%s" % (lvm.segmentation_id, ofports))
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else:
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self._set_arp_responder('add', lvm.vlan, port_info[0],
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port_info[1])
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self.tun_br.add_flow(table=constants.UCAST_TO_TUN,
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priority=2,
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dl_vlan=lvm.vlan,
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dl_dst=port_info[0],
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actions="strip_vlan,set_tunnel:%s,output:%s" %
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(lvm.segmentation_id, ofport))
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def _del_fdb_flow(self, port_info, lvm, ofport):
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if port_info == q_const.FLOODING_ENTRY:
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lvm.tun_ofports.remove(ofport)
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if len(lvm.tun_ofports) > 0:
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ofports = ','.join(lvm.tun_ofports)
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self.tun_br.mod_flow(table=constants.FLOOD_TO_TUN,
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dl_vlan=lvm.vlan,
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actions="strip_vlan,"
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"set_tunnel:%s,output:%s" %
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(lvm.segmentation_id, ofports))
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else:
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# This local vlan doesn't require any more tunnelling
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self.tun_br.delete_flows(table=constants.FLOOD_TO_TUN,
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dl_vlan=lvm.vlan)
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# Check if this tunnel port is still used
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self.cleanup_tunnel_port(ofport, lvm.network_type)
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else:
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self._set_arp_responder('remove', lvm.vlan, port_info[0],
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port_info[1])
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self.tun_br.delete_flows(table=constants.UCAST_TO_TUN,
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dl_vlan=lvm.vlan,
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dl_dst=port_info[0])
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def _fdb_chg_ip(self, context, fdb_entries):
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'''fdb update when an IP of a port is updated.
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The ML2 l2-pop mechanism driver send an fdb update rpc message when an
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IP of a port is updated.
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:param context: RPC context.
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:param fdb_entries: fdb dicts that contain all mac/IP informations per
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agent and network.
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{'net1':
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{'agent_ip':
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{'before': [[mac, ip]],
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'after': [[mac, ip]]
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}
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}
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'net2':
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...
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}
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'''
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LOG.debug(_("update chg_ip received"))
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# TODO(ethuleau): Use OVS defer apply flows for all rules will be an
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# interesting improvement here. But actually, OVS lib defer apply flows
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# methods doesn't ensure the add flows will be applied before delete.
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for network_id, agent_ports in fdb_entries.items():
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lvm = self.local_vlan_map.get(network_id)
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if not lvm:
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continue
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for agent_ip, state in agent_ports.items():
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if agent_ip == self.local_ip:
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continue
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after = state.get('after')
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for mac, ip in after:
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self._set_arp_responder('add', lvm.vlan, mac, ip)
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before = state.get('before')
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for mac, ip in before:
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self._set_arp_responder('remove', lvm.vlan, mac, ip)
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def fdb_update(self, context, fdb_entries):
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LOG.debug(_("fdb_update received"))
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for action, values in fdb_entries.items():
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method = '_fdb_' + action
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if not hasattr(self, method):
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raise NotImplementedError()
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getattr(self, method)(context, values)
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def _set_arp_responder(self, action, lvid, mac_str, ip_str):
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'''Set the ARP respond entry.
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When the l2 population mechanism driver and OVS supports to edit ARP
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fields, a table (ARP_RESPONDER) to resolve ARP locally is added to the
|
|
tunnel bridge.
|
|
|
|
:param action: add or remove ARP entry.
|
|
:param lvid: local VLAN map of network's ARP entry.
|
|
:param mac_str: MAC string value.
|
|
:param ip_str: IP string value.
|
|
'''
|
|
if not self.arp_responder_enabled:
|
|
return
|
|
|
|
mac = netaddr.EUI(mac_str, dialect=netaddr.mac_unix)
|
|
ip = netaddr.IPAddress(ip_str)
|
|
|
|
if action == 'add':
|
|
actions = ('move:NXM_OF_ETH_SRC[]->NXM_OF_ETH_DST[],'
|
|
'mod_dl_src:%(mac)s,'
|
|
'load:0x2->NXM_OF_ARP_OP[],'
|
|
'move:NXM_NX_ARP_SHA[]->NXM_NX_ARP_THA[],'
|
|
'move:NXM_OF_ARP_SPA[]->NXM_OF_ARP_TPA[],'
|
|
'load:%(mac)#x->NXM_NX_ARP_SHA[],'
|
|
'load:%(ip)#x->NXM_OF_ARP_SPA[],'
|
|
'in_port' % {'mac': mac, 'ip': ip})
|
|
self.tun_br.add_flow(table=constants.ARP_RESPONDER,
|
|
priority=1,
|
|
proto='arp',
|
|
dl_vlan=lvid,
|
|
nw_dst='%s' % ip,
|
|
actions=actions)
|
|
elif action == 'remove':
|
|
self.tun_br.delete_flows(table=constants.ARP_RESPONDER,
|
|
proto='arp',
|
|
dl_vlan=lvid,
|
|
nw_dst='%s' % ip)
|
|
else:
|
|
LOG.warning(_('Action %s not supported'), action)
|
|
|
|
def provision_local_vlan(self, net_uuid, network_type, physical_network,
|
|
segmentation_id):
|
|
'''Provisions a local VLAN.
|
|
|
|
:param net_uuid: the uuid of the network associated with this vlan.
|
|
:param network_type: the network type ('gre', 'vxlan', 'vlan', 'flat',
|
|
'local')
|
|
:param physical_network: the physical network for 'vlan' or 'flat'
|
|
:param segmentation_id: the VID for 'vlan' or tunnel ID for 'tunnel'
|
|
'''
|
|
|
|
# On a restart or crash of OVS, the network associated with this VLAN
|
|
# will already be assigned, so check for that here before assigning a
|
|
# new one.
|
|
lvm = self.local_vlan_map.get(net_uuid)
|
|
if lvm:
|
|
lvid = lvm.vlan
|
|
else:
|
|
if not self.available_local_vlans:
|
|
LOG.error(_("No local VLAN available for net-id=%s"), net_uuid)
|
|
return
|
|
lvid = self.available_local_vlans.pop()
|
|
self.local_vlan_map[net_uuid] = LocalVLANMapping(lvid,
|
|
network_type,
|
|
physical_network,
|
|
segmentation_id)
|
|
|
|
LOG.info(_("Assigning %(vlan_id)s as local vlan for "
|
|
"net-id=%(net_uuid)s"),
|
|
{'vlan_id': lvid, 'net_uuid': net_uuid})
|
|
|
|
if network_type in constants.TUNNEL_NETWORK_TYPES:
|
|
if self.enable_tunneling:
|
|
# outbound broadcast/multicast
|
|
ofports = ','.join(self.tun_br_ofports[network_type].values())
|
|
if ofports:
|
|
self.tun_br.mod_flow(table=constants.FLOOD_TO_TUN,
|
|
dl_vlan=lvid,
|
|
actions="strip_vlan,"
|
|
"set_tunnel:%s,output:%s" %
|
|
(segmentation_id, ofports))
|
|
# inbound from tunnels: set lvid in the right table
|
|
# and resubmit to Table LEARN_FROM_TUN for mac learning
|
|
self.tun_br.add_flow(table=constants.TUN_TABLE[network_type],
|
|
priority=1,
|
|
tun_id=segmentation_id,
|
|
actions="mod_vlan_vid:%s,resubmit(,%s)" %
|
|
(lvid, constants.LEARN_FROM_TUN))
|
|
else:
|
|
LOG.error(_("Cannot provision %(network_type)s network for "
|
|
"net-id=%(net_uuid)s - tunneling disabled"),
|
|
{'network_type': network_type,
|
|
'net_uuid': net_uuid})
|
|
elif network_type == p_const.TYPE_FLAT:
|
|
if physical_network in self.phys_brs:
|
|
# outbound
|
|
br = self.phys_brs[physical_network]
|
|
br.add_flow(priority=4,
|
|
in_port=self.phys_ofports[physical_network],
|
|
dl_vlan=lvid,
|
|
actions="strip_vlan,normal")
|
|
# inbound
|
|
self.int_br.add_flow(
|
|
priority=3,
|
|
in_port=self.int_ofports[physical_network],
|
|
dl_vlan=0xffff,
|
|
actions="mod_vlan_vid:%s,normal" % lvid)
|
|
else:
|
|
LOG.error(_("Cannot provision flat network for "
|
|
"net-id=%(net_uuid)s - no bridge for "
|
|
"physical_network %(physical_network)s"),
|
|
{'net_uuid': net_uuid,
|
|
'physical_network': physical_network})
|
|
elif network_type == p_const.TYPE_VLAN:
|
|
if physical_network in self.phys_brs:
|
|
# outbound
|
|
br = self.phys_brs[physical_network]
|
|
br.add_flow(priority=4,
|
|
in_port=self.phys_ofports[physical_network],
|
|
dl_vlan=lvid,
|
|
actions="mod_vlan_vid:%s,normal" % segmentation_id)
|
|
# inbound
|
|
self.int_br.add_flow(priority=3,
|
|
in_port=self.
|
|
int_ofports[physical_network],
|
|
dl_vlan=segmentation_id,
|
|
actions="mod_vlan_vid:%s,normal" % lvid)
|
|
else:
|
|
LOG.error(_("Cannot provision VLAN network for "
|
|
"net-id=%(net_uuid)s - no bridge for "
|
|
"physical_network %(physical_network)s"),
|
|
{'net_uuid': net_uuid,
|
|
'physical_network': physical_network})
|
|
elif network_type == p_const.TYPE_LOCAL:
|
|
# no flows needed for local networks
|
|
pass
|
|
else:
|
|
LOG.error(_("Cannot provision unknown network type "
|
|
"%(network_type)s for net-id=%(net_uuid)s"),
|
|
{'network_type': network_type,
|
|
'net_uuid': net_uuid})
|
|
|
|
def reclaim_local_vlan(self, net_uuid):
|
|
'''Reclaim a local VLAN.
|
|
|
|
:param net_uuid: the network uuid associated with this vlan.
|
|
:param lvm: a LocalVLANMapping object that tracks (vlan, lsw_id,
|
|
vif_ids) mapping.
|
|
'''
|
|
lvm = self.local_vlan_map.pop(net_uuid, None)
|
|
if lvm is None:
|
|
LOG.debug(_("Network %s not used on agent."), net_uuid)
|
|
return
|
|
|
|
LOG.info(_("Reclaiming vlan = %(vlan_id)s from net-id = %(net_uuid)s"),
|
|
{'vlan_id': lvm.vlan,
|
|
'net_uuid': net_uuid})
|
|
|
|
if lvm.network_type in constants.TUNNEL_NETWORK_TYPES:
|
|
if self.enable_tunneling:
|
|
self.tun_br.delete_flows(
|
|
table=constants.TUN_TABLE[lvm.network_type],
|
|
tun_id=lvm.segmentation_id)
|
|
self.tun_br.delete_flows(dl_vlan=lvm.vlan)
|
|
if self.l2_pop:
|
|
# Try to remove tunnel ports if not used by other networks
|
|
for ofport in lvm.tun_ofports:
|
|
self.cleanup_tunnel_port(ofport, lvm.network_type)
|
|
elif lvm.network_type == p_const.TYPE_FLAT:
|
|
if lvm.physical_network in self.phys_brs:
|
|
# outbound
|
|
br = self.phys_brs[lvm.physical_network]
|
|
br.delete_flows(in_port=self.phys_ofports[lvm.
|
|
physical_network],
|
|
dl_vlan=lvm.vlan)
|
|
# inbound
|
|
br = self.int_br
|
|
br.delete_flows(in_port=self.int_ofports[lvm.physical_network],
|
|
dl_vlan=0xffff)
|
|
elif lvm.network_type == p_const.TYPE_VLAN:
|
|
if lvm.physical_network in self.phys_brs:
|
|
# outbound
|
|
br = self.phys_brs[lvm.physical_network]
|
|
br.delete_flows(in_port=self.phys_ofports[lvm.
|
|
physical_network],
|
|
dl_vlan=lvm.vlan)
|
|
# inbound
|
|
br = self.int_br
|
|
br.delete_flows(in_port=self.int_ofports[lvm.physical_network],
|
|
dl_vlan=lvm.segmentation_id)
|
|
elif lvm.network_type == p_const.TYPE_LOCAL:
|
|
# no flows needed for local networks
|
|
pass
|
|
else:
|
|
LOG.error(_("Cannot reclaim unknown network type "
|
|
"%(network_type)s for net-id=%(net_uuid)s"),
|
|
{'network_type': lvm.network_type,
|
|
'net_uuid': net_uuid})
|
|
|
|
self.available_local_vlans.add(lvm.vlan)
|
|
|
|
def port_bound(self, port, net_uuid,
|
|
network_type, physical_network, segmentation_id,
|
|
ovs_restarted):
|
|
'''Bind port to net_uuid/lsw_id and install flow for inbound traffic
|
|
to vm.
|
|
|
|
:param port: a ovslib.VifPort object.
|
|
:param net_uuid: the net_uuid this port is to be associated with.
|
|
:param network_type: the network type ('gre', 'vlan', 'flat', 'local')
|
|
:param physical_network: the physical network for 'vlan' or 'flat'
|
|
:param segmentation_id: the VID for 'vlan' or tunnel ID for 'tunnel'
|
|
:param ovs_restarted: indicates if this is called for an OVS restart.
|
|
'''
|
|
if net_uuid not in self.local_vlan_map or ovs_restarted:
|
|
self.provision_local_vlan(net_uuid, network_type,
|
|
physical_network, segmentation_id)
|
|
lvm = self.local_vlan_map[net_uuid]
|
|
lvm.vif_ports[port.vif_id] = port
|
|
# Do not bind a port if it's already bound
|
|
cur_tag = self.int_br.db_get_val("Port", port.port_name, "tag")
|
|
if cur_tag != str(lvm.vlan):
|
|
self.int_br.set_db_attribute("Port", port.port_name, "tag",
|
|
str(lvm.vlan))
|
|
if port.ofport != -1:
|
|
self.int_br.delete_flows(in_port=port.ofport)
|
|
|
|
def port_unbound(self, vif_id, net_uuid=None):
|
|
'''Unbind port.
|
|
|
|
Removes corresponding local vlan mapping object if this is its last
|
|
VIF.
|
|
|
|
:param vif_id: the id of the vif
|
|
:param net_uuid: the net_uuid this port is associated with.
|
|
'''
|
|
if net_uuid is None:
|
|
net_uuid = self.get_net_uuid(vif_id)
|
|
|
|
if not self.local_vlan_map.get(net_uuid):
|
|
LOG.info(_('port_unbound() net_uuid %s not in local_vlan_map'),
|
|
net_uuid)
|
|
return
|
|
|
|
lvm = self.local_vlan_map[net_uuid]
|
|
lvm.vif_ports.pop(vif_id, None)
|
|
|
|
if not lvm.vif_ports:
|
|
self.reclaim_local_vlan(net_uuid)
|
|
|
|
def port_dead(self, port):
|
|
'''Once a port has no binding, put it on the "dead vlan".
|
|
|
|
:param port: a ovs_lib.VifPort object.
|
|
'''
|
|
# Don't kill a port if it's already dead
|
|
cur_tag = self.int_br.db_get_val("Port", port.port_name, "tag")
|
|
if cur_tag != DEAD_VLAN_TAG:
|
|
self.int_br.set_db_attribute("Port", port.port_name, "tag",
|
|
DEAD_VLAN_TAG)
|
|
self.int_br.add_flow(priority=2, in_port=port.ofport,
|
|
actions="drop")
|
|
|
|
def setup_integration_br(self):
|
|
'''Setup the integration bridge.
|
|
|
|
Create patch ports and remove all existing flows.
|
|
|
|
:param bridge_name: the name of the integration bridge.
|
|
:returns: the integration bridge
|
|
'''
|
|
self.int_br.delete_port(cfg.CONF.OVS.int_peer_patch_port)
|
|
self.int_br.remove_all_flows()
|
|
# switch all traffic using L2 learning
|
|
self.int_br.add_flow(priority=1, actions="normal")
|
|
# Add a canary flow to int_br to track OVS restarts
|
|
self.int_br.add_flow(table=constants.CANARY_TABLE, priority=0,
|
|
actions="drop")
|
|
|
|
def setup_ancillary_bridges(self, integ_br, tun_br):
|
|
'''Setup ancillary bridges - for example br-ex.'''
|
|
ovs_bridges = set(ovs_lib.get_bridges(self.root_helper))
|
|
# Remove all known bridges
|
|
ovs_bridges.remove(integ_br)
|
|
if self.enable_tunneling:
|
|
ovs_bridges.remove(tun_br)
|
|
br_names = [self.phys_brs[physical_network].br_name for
|
|
physical_network in self.phys_brs]
|
|
ovs_bridges.difference_update(br_names)
|
|
# Filter list of bridges to those that have external
|
|
# bridge-id's configured
|
|
br_names = []
|
|
for bridge in ovs_bridges:
|
|
id = ovs_lib.get_bridge_external_bridge_id(self.root_helper,
|
|
bridge)
|
|
if id != bridge:
|
|
br_names.append(bridge)
|
|
ovs_bridges.difference_update(br_names)
|
|
ancillary_bridges = []
|
|
for bridge in ovs_bridges:
|
|
br = ovs_lib.OVSBridge(bridge, self.root_helper)
|
|
LOG.info(_('Adding %s to list of bridges.'), bridge)
|
|
ancillary_bridges.append(br)
|
|
return ancillary_bridges
|
|
|
|
def setup_tunnel_br(self, tun_br=None):
|
|
'''Setup the tunnel bridge.
|
|
|
|
Creates tunnel bridge, and links it to the integration bridge
|
|
using a patch port.
|
|
|
|
:param tun_br: the name of the tunnel bridge.
|
|
'''
|
|
if not self.tun_br:
|
|
self.tun_br = ovs_lib.OVSBridge(tun_br, self.root_helper)
|
|
|
|
self.tun_br.reset_bridge()
|
|
self.patch_tun_ofport = self.int_br.add_patch_port(
|
|
cfg.CONF.OVS.int_peer_patch_port, cfg.CONF.OVS.tun_peer_patch_port)
|
|
self.patch_int_ofport = self.tun_br.add_patch_port(
|
|
cfg.CONF.OVS.tun_peer_patch_port, cfg.CONF.OVS.int_peer_patch_port)
|
|
if int(self.patch_tun_ofport) < 0 or int(self.patch_int_ofport) < 0:
|
|
LOG.error(_("Failed to create OVS patch port. Cannot have "
|
|
"tunneling enabled on this agent, since this version "
|
|
"of OVS does not support tunnels or patch ports. "
|
|
"Agent terminated!"))
|
|
exit(1)
|
|
self.tun_br.remove_all_flows()
|
|
|
|
# Table 0 (default) will sort incoming traffic depending on in_port
|
|
self.tun_br.add_flow(priority=1,
|
|
in_port=self.patch_int_ofport,
|
|
actions="resubmit(,%s)" %
|
|
constants.PATCH_LV_TO_TUN)
|
|
self.tun_br.add_flow(priority=0, actions="drop")
|
|
if self.arp_responder_enabled:
|
|
# ARP broadcast-ed request go to the local ARP_RESPONDER table to
|
|
# be locally resolved
|
|
self.tun_br.add_flow(table=constants.PATCH_LV_TO_TUN,
|
|
priority=1,
|
|
proto='arp',
|
|
dl_dst="ff:ff:ff:ff:ff:ff",
|
|
actions=("resubmit(,%s)" %
|
|
constants.ARP_RESPONDER))
|
|
# PATCH_LV_TO_TUN table will handle packets coming from patch_int
|
|
# unicasts go to table UCAST_TO_TUN where remote addresses are learnt
|
|
self.tun_br.add_flow(table=constants.PATCH_LV_TO_TUN,
|
|
priority=0,
|
|
dl_dst="00:00:00:00:00:00/01:00:00:00:00:00",
|
|
actions="resubmit(,%s)" % constants.UCAST_TO_TUN)
|
|
# Broadcasts/multicasts go to table FLOOD_TO_TUN that handles flooding
|
|
self.tun_br.add_flow(table=constants.PATCH_LV_TO_TUN,
|
|
priority=0,
|
|
dl_dst="01:00:00:00:00:00/01:00:00:00:00:00",
|
|
actions="resubmit(,%s)" % constants.FLOOD_TO_TUN)
|
|
# Tables [tunnel_type]_TUN_TO_LV will set lvid depending on tun_id
|
|
# for each tunnel type, and resubmit to table LEARN_FROM_TUN where
|
|
# remote mac addresses will be learnt
|
|
for tunnel_type in constants.TUNNEL_NETWORK_TYPES:
|
|
self.tun_br.add_flow(table=constants.TUN_TABLE[tunnel_type],
|
|
priority=0,
|
|
actions="drop")
|
|
# LEARN_FROM_TUN table will have a single flow using a learn action to
|
|
# dynamically set-up flows in UCAST_TO_TUN corresponding to remote mac
|
|
# addresses (assumes that lvid has already been set by a previous flow)
|
|
learned_flow = ("table=%s,"
|
|
"priority=1,"
|
|
"hard_timeout=300,"
|
|
"NXM_OF_VLAN_TCI[0..11],"
|
|
"NXM_OF_ETH_DST[]=NXM_OF_ETH_SRC[],"
|
|
"load:0->NXM_OF_VLAN_TCI[],"
|
|
"load:NXM_NX_TUN_ID[]->NXM_NX_TUN_ID[],"
|
|
"output:NXM_OF_IN_PORT[]" %
|
|
constants.UCAST_TO_TUN)
|
|
# Once remote mac addresses are learnt, output packet to patch_int
|
|
self.tun_br.add_flow(table=constants.LEARN_FROM_TUN,
|
|
priority=1,
|
|
actions="learn(%s),output:%s" %
|
|
(learned_flow, self.patch_int_ofport))
|
|
# Egress unicast will be handled in table UCAST_TO_TUN, where remote
|
|
# mac addresses will be learned. For now, just add a default flow that
|
|
# will resubmit unknown unicasts to table FLOOD_TO_TUN to treat them
|
|
# as broadcasts/multicasts
|
|
self.tun_br.add_flow(table=constants.UCAST_TO_TUN,
|
|
priority=0,
|
|
actions="resubmit(,%s)" %
|
|
constants.FLOOD_TO_TUN)
|
|
if self.arp_responder_enabled:
|
|
# If none of the ARP entries correspond to the requested IP, the
|
|
# broadcast-ed packet is resubmitted to the flooding table
|
|
self.tun_br.add_flow(table=constants.ARP_RESPONDER,
|
|
priority=0,
|
|
actions="resubmit(,%s)" %
|
|
constants.FLOOD_TO_TUN)
|
|
# FLOOD_TO_TUN will handle flooding in tunnels based on lvid,
|
|
# for now, add a default drop action
|
|
self.tun_br.add_flow(table=constants.FLOOD_TO_TUN,
|
|
priority=0,
|
|
actions="drop")
|
|
|
|
def get_veth_name(self, prefix, name):
|
|
"""Construct a veth name based on the prefix and name that does not
|
|
exceed the maximum length allowed for a linux device. Longer names
|
|
are hashed to help ensure uniqueness.
|
|
"""
|
|
if len(prefix + name) <= q_const.DEVICE_NAME_MAX_LEN:
|
|
return prefix + name
|
|
# We can't just truncate because bridges may be distinguished
|
|
# by an ident at the end. A hash over the name should be unique.
|
|
# Leave part of the bridge name on for easier identification
|
|
hashlen = 6
|
|
namelen = q_const.DEVICE_NAME_MAX_LEN - len(prefix) - hashlen
|
|
new_name = ('%(prefix)s%(truncated)s%(hash)s' %
|
|
{'prefix': prefix, 'truncated': name[0:namelen],
|
|
'hash': hashlib.sha1(name).hexdigest()[0:hashlen]})
|
|
LOG.warning(_("Creating an interface named %(name)s exceeds the "
|
|
"%(limit)d character limitation. It was shortened to "
|
|
"%(new_name)s to fit."),
|
|
{'name': name, 'limit': q_const.DEVICE_NAME_MAX_LEN,
|
|
'new_name': new_name})
|
|
return new_name
|
|
|
|
def setup_physical_bridges(self, bridge_mappings):
|
|
'''Setup the physical network bridges.
|
|
|
|
Creates physical network bridges and links them to the
|
|
integration bridge using veths.
|
|
|
|
:param bridge_mappings: map physical network names to bridge names.
|
|
'''
|
|
self.phys_brs = {}
|
|
self.int_ofports = {}
|
|
self.phys_ofports = {}
|
|
ip_wrapper = ip_lib.IPWrapper(self.root_helper)
|
|
for physical_network, bridge in bridge_mappings.iteritems():
|
|
LOG.info(_("Mapping physical network %(physical_network)s to "
|
|
"bridge %(bridge)s"),
|
|
{'physical_network': physical_network,
|
|
'bridge': bridge})
|
|
# setup physical bridge
|
|
if not ip_lib.device_exists(bridge, self.root_helper):
|
|
LOG.error(_("Bridge %(bridge)s for physical network "
|
|
"%(physical_network)s does not exist. Agent "
|
|
"terminated!"),
|
|
{'physical_network': physical_network,
|
|
'bridge': bridge})
|
|
sys.exit(1)
|
|
br = ovs_lib.OVSBridge(bridge, self.root_helper)
|
|
br.remove_all_flows()
|
|
br.add_flow(priority=1, actions="normal")
|
|
self.phys_brs[physical_network] = br
|
|
|
|
# create veth to patch physical bridge with integration bridge
|
|
int_veth_name = self.get_veth_name(
|
|
constants.VETH_INTEGRATION_PREFIX, bridge)
|
|
self.int_br.delete_port(int_veth_name)
|
|
phys_veth_name = self.get_veth_name(
|
|
constants.VETH_PHYSICAL_PREFIX, bridge)
|
|
br.delete_port(phys_veth_name)
|
|
if ip_lib.device_exists(int_veth_name, self.root_helper):
|
|
ip_lib.IPDevice(int_veth_name, self.root_helper).link.delete()
|
|
# Give udev a chance to process its rules here, to avoid
|
|
# race conditions between commands launched by udev rules
|
|
# and the subsequent call to ip_wrapper.add_veth
|
|
utils.execute(['/sbin/udevadm', 'settle', '--timeout=10'])
|
|
int_veth, phys_veth = ip_wrapper.add_veth(int_veth_name,
|
|
phys_veth_name)
|
|
self.int_ofports[physical_network] = self.int_br.add_port(int_veth)
|
|
self.phys_ofports[physical_network] = br.add_port(phys_veth)
|
|
|
|
# block all untranslated traffic over veth between bridges
|
|
self.int_br.add_flow(priority=2,
|
|
in_port=self.int_ofports[physical_network],
|
|
actions="drop")
|
|
br.add_flow(priority=2,
|
|
in_port=self.phys_ofports[physical_network],
|
|
actions="drop")
|
|
|
|
# enable veth to pass traffic
|
|
int_veth.link.set_up()
|
|
phys_veth.link.set_up()
|
|
|
|
if self.veth_mtu:
|
|
# set up mtu size for veth interfaces
|
|
int_veth.link.set_mtu(self.veth_mtu)
|
|
phys_veth.link.set_mtu(self.veth_mtu)
|
|
|
|
def scan_ports(self, registered_ports, updated_ports=None):
|
|
cur_ports = self.int_br.get_vif_port_set()
|
|
self.int_br_device_count = len(cur_ports)
|
|
port_info = {'current': cur_ports}
|
|
if updated_ports is None:
|
|
updated_ports = set()
|
|
updated_ports.update(self.check_changed_vlans(registered_ports))
|
|
if updated_ports:
|
|
# Some updated ports might have been removed in the
|
|
# meanwhile, and therefore should not be processed.
|
|
# In this case the updated port won't be found among
|
|
# current ports.
|
|
updated_ports &= cur_ports
|
|
if updated_ports:
|
|
port_info['updated'] = updated_ports
|
|
|
|
# FIXME(salv-orlando): It's not really necessary to return early
|
|
# if nothing has changed.
|
|
if cur_ports == registered_ports:
|
|
# No added or removed ports to set, just return here
|
|
return port_info
|
|
|
|
port_info['added'] = cur_ports - registered_ports
|
|
# Remove all the known ports not found on the integration bridge
|
|
port_info['removed'] = registered_ports - cur_ports
|
|
return port_info
|
|
|
|
def check_changed_vlans(self, registered_ports):
|
|
"""Return ports which have lost their vlan tag.
|
|
|
|
The returned value is a set of port ids of the ports concerned by a
|
|
vlan tag loss.
|
|
"""
|
|
port_tags = self.int_br.get_port_tag_dict()
|
|
changed_ports = set()
|
|
for lvm in self.local_vlan_map.values():
|
|
for port in registered_ports:
|
|
if (
|
|
port in lvm.vif_ports
|
|
and lvm.vif_ports[port].port_name in port_tags
|
|
and port_tags[lvm.vif_ports[port].port_name] != lvm.vlan
|
|
):
|
|
LOG.info(
|
|
_("Port '%(port_name)s' has lost "
|
|
"its vlan tag '%(vlan_tag)d'!"),
|
|
{'port_name': lvm.vif_ports[port].port_name,
|
|
'vlan_tag': lvm.vlan}
|
|
)
|
|
changed_ports.add(port)
|
|
return changed_ports
|
|
|
|
def update_ancillary_ports(self, registered_ports):
|
|
ports = set()
|
|
for bridge in self.ancillary_brs:
|
|
ports |= bridge.get_vif_port_set()
|
|
|
|
if ports == registered_ports:
|
|
return
|
|
added = ports - registered_ports
|
|
removed = registered_ports - ports
|
|
return {'current': ports,
|
|
'added': added,
|
|
'removed': removed}
|
|
|
|
def treat_vif_port(self, vif_port, port_id, network_id, network_type,
|
|
physical_network, segmentation_id, admin_state_up,
|
|
ovs_restarted):
|
|
# When this function is called for a port, the port should have
|
|
# an OVS ofport configured, as only these ports were considered
|
|
# for being treated. If that does not happen, it is a potential
|
|
# error condition of which operators should be aware
|
|
if not vif_port.ofport:
|
|
LOG.warn(_("VIF port: %s has no ofport configured, and might not "
|
|
"be able to transmit"), vif_port.vif_id)
|
|
if vif_port:
|
|
if admin_state_up:
|
|
self.port_bound(vif_port, network_id, network_type,
|
|
physical_network, segmentation_id,
|
|
ovs_restarted)
|
|
else:
|
|
self.port_dead(vif_port)
|
|
else:
|
|
LOG.debug(_("No VIF port for port %s defined on agent."), port_id)
|
|
|
|
def setup_tunnel_port(self, port_name, remote_ip, tunnel_type):
|
|
ofport = self.tun_br.add_tunnel_port(port_name,
|
|
remote_ip,
|
|
self.local_ip,
|
|
tunnel_type,
|
|
self.vxlan_udp_port,
|
|
self.dont_fragment)
|
|
ofport_int = -1
|
|
try:
|
|
ofport_int = int(ofport)
|
|
except (TypeError, ValueError):
|
|
LOG.exception(_("ofport should have a value that can be "
|
|
"interpreted as an integer"))
|
|
if ofport_int < 0:
|
|
LOG.error(_("Failed to set-up %(type)s tunnel port to %(ip)s"),
|
|
{'type': tunnel_type, 'ip': remote_ip})
|
|
return 0
|
|
|
|
self.tun_br_ofports[tunnel_type][remote_ip] = ofport
|
|
# Add flow in default table to resubmit to the right
|
|
# tunnelling table (lvid will be set in the latter)
|
|
self.tun_br.add_flow(priority=1,
|
|
in_port=ofport,
|
|
actions="resubmit(,%s)" %
|
|
constants.TUN_TABLE[tunnel_type])
|
|
|
|
ofports = ','.join(self.tun_br_ofports[tunnel_type].values())
|
|
if ofports and not self.l2_pop:
|
|
# Update flooding flows to include the new tunnel
|
|
for network_id, vlan_mapping in self.local_vlan_map.iteritems():
|
|
if vlan_mapping.network_type == tunnel_type:
|
|
self.tun_br.mod_flow(table=constants.FLOOD_TO_TUN,
|
|
dl_vlan=vlan_mapping.vlan,
|
|
actions="strip_vlan,"
|
|
"set_tunnel:%s,output:%s" %
|
|
(vlan_mapping.segmentation_id,
|
|
ofports))
|
|
return ofport
|
|
|
|
def cleanup_tunnel_port(self, tun_ofport, tunnel_type):
|
|
# Check if this tunnel port is still used
|
|
for lvm in self.local_vlan_map.values():
|
|
if tun_ofport in lvm.tun_ofports:
|
|
break
|
|
# If not, remove it
|
|
else:
|
|
for remote_ip, ofport in self.tun_br_ofports[tunnel_type].items():
|
|
if ofport == tun_ofport:
|
|
port_name = '%s-%s' % (tunnel_type,
|
|
self.get_ip_in_hex(remote_ip))
|
|
self.tun_br.delete_port(port_name)
|
|
self.tun_br.delete_flows(in_port=ofport)
|
|
self.tun_br_ofports[tunnel_type].pop(remote_ip, None)
|
|
|
|
def treat_devices_added_or_updated(self, devices, ovs_restarted):
|
|
resync = False
|
|
for device in devices:
|
|
LOG.debug(_("Processing port %s"), device)
|
|
port = self.int_br.get_vif_port_by_id(device)
|
|
if not port:
|
|
# The port has disappeared and should not be processed
|
|
# There is no need to put the port DOWN in the plugin as
|
|
# it never went up in the first place
|
|
LOG.info(_("Port %s was not found on the integration bridge "
|
|
"and will therefore not be processed"), device)
|
|
continue
|
|
try:
|
|
# TODO(salv-orlando): Provide bulk API for retrieving
|
|
# details for all devices in one call
|
|
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})
|
|
self.treat_vif_port(port, details['port_id'],
|
|
details['network_id'],
|
|
details['network_type'],
|
|
details['physical_network'],
|
|
details['segmentation_id'],
|
|
details['admin_state_up'],
|
|
ovs_restarted)
|
|
# update plugin about port status
|
|
if details.get('admin_state_up'):
|
|
LOG.debug(_("Setting status for %s to UP"), device)
|
|
self.plugin_rpc.update_device_up(
|
|
self.context, device, self.agent_id, cfg.CONF.host)
|
|
else:
|
|
LOG.debug(_("Setting status for %s to DOWN"), device)
|
|
self.plugin_rpc.update_device_down(
|
|
self.context, device, self.agent_id, cfg.CONF.host)
|
|
LOG.info(_("Configuration for device %s completed."), device)
|
|
else:
|
|
LOG.warn(_("Device %s not defined on plugin"), device)
|
|
if (port and port.ofport != -1):
|
|
self.port_dead(port)
|
|
return resync
|
|
|
|
def treat_ancillary_devices_added(self, devices):
|
|
resync = False
|
|
for device in devices:
|
|
LOG.info(_("Ancillary Port %s added"), device)
|
|
try:
|
|
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
|
|
|
|
# update plugin about port status
|
|
self.plugin_rpc.update_device_up(self.context,
|
|
device,
|
|
self.agent_id,
|
|
cfg.CONF.host)
|
|
return resync
|
|
|
|
def treat_devices_removed(self, devices):
|
|
resync = False
|
|
self.sg_agent.remove_devices_filter(devices)
|
|
for device in devices:
|
|
LOG.info(_("Attachment %s removed"), device)
|
|
try:
|
|
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
|
|
continue
|
|
self.port_unbound(device)
|
|
return resync
|
|
|
|
def treat_ancillary_devices_removed(self, devices):
|
|
resync = False
|
|
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
|
|
continue
|
|
if details['exists']:
|
|
LOG.info(_("Port %s updated."), device)
|
|
# Nothing to do regarding local networking
|
|
else:
|
|
LOG.debug(_("Device %s not defined on plugin"), device)
|
|
return resync
|
|
|
|
def process_network_ports(self, port_info, ovs_restarted):
|
|
resync_a = False
|
|
resync_b = False
|
|
# TODO(salv-orlando): consider a solution for ensuring notifications
|
|
# are processed exactly in the same order in which they were
|
|
# received. This is tricky because there are two notification
|
|
# sources: the neutron server, and the ovs db monitor process
|
|
# If there is an exception while processing security groups ports
|
|
# will not be wired anyway, and a resync will be triggered
|
|
# TODO(salv-orlando): Optimize avoiding applying filters unnecessarily
|
|
# (eg: when there are no IP address changes)
|
|
self.sg_agent.setup_port_filters(port_info.get('added', set()),
|
|
port_info.get('updated', set()))
|
|
# VIF wiring needs to be performed always for 'new' devices.
|
|
# For updated ports, re-wiring is not needed in most cases, but needs
|
|
# to be performed anyway when the admin state of a device is changed.
|
|
# A device might be both in the 'added' and 'updated'
|
|
# list at the same time; avoid processing it twice.
|
|
devices_added_updated = (port_info.get('added', set()) |
|
|
port_info.get('updated', set()))
|
|
if devices_added_updated:
|
|
start = time.time()
|
|
resync_a = self.treat_devices_added_or_updated(
|
|
devices_added_updated, ovs_restarted)
|
|
LOG.debug(_("process_network_ports - iteration:%(iter_num)d -"
|
|
"treat_devices_added_or_updated completed "
|
|
"in %(elapsed).3f"),
|
|
{'iter_num': self.iter_num,
|
|
'elapsed': time.time() - start})
|
|
if 'removed' in port_info:
|
|
start = time.time()
|
|
resync_b = self.treat_devices_removed(port_info['removed'])
|
|
LOG.debug(_("process_network_ports - iteration:%(iter_num)d -"
|
|
"treat_devices_removed completed in %(elapsed).3f"),
|
|
{'iter_num': self.iter_num,
|
|
'elapsed': time.time() - start})
|
|
# If one of the above operations fails => resync with plugin
|
|
return (resync_a | resync_b)
|
|
|
|
def process_ancillary_network_ports(self, port_info):
|
|
resync_a = False
|
|
resync_b = False
|
|
if 'added' in port_info:
|
|
start = time.time()
|
|
resync_a = self.treat_ancillary_devices_added(port_info['added'])
|
|
LOG.debug(_("process_ancillary_network_ports - iteration: "
|
|
"%(iter_num)d - treat_ancillary_devices_added "
|
|
"completed in %(elapsed).3f"),
|
|
{'iter_num': self.iter_num,
|
|
'elapsed': time.time() - start})
|
|
if 'removed' in port_info:
|
|
start = time.time()
|
|
resync_b = self.treat_ancillary_devices_removed(
|
|
port_info['removed'])
|
|
LOG.debug(_("process_ancillary_network_ports - iteration: "
|
|
"%(iter_num)d - treat_ancillary_devices_removed "
|
|
"completed in %(elapsed).3f"),
|
|
{'iter_num': self.iter_num,
|
|
'elapsed': time.time() - start})
|
|
|
|
# If one of the above operations fails => resync with plugin
|
|
return (resync_a | resync_b)
|
|
|
|
def get_ip_in_hex(self, ip_address):
|
|
try:
|
|
return '%08x' % netaddr.IPAddress(ip_address, version=4)
|
|
except Exception:
|
|
LOG.warn(_("Unable to create tunnel port. Invalid remote IP: %s"),
|
|
ip_address)
|
|
return
|
|
|
|
def tunnel_sync(self):
|
|
resync = False
|
|
try:
|
|
for tunnel_type in self.tunnel_types:
|
|
details = self.plugin_rpc.tunnel_sync(self.context,
|
|
self.local_ip,
|
|
tunnel_type)
|
|
if not self.l2_pop:
|
|
tunnels = details['tunnels']
|
|
for tunnel in tunnels:
|
|
if self.local_ip != tunnel['ip_address']:
|
|
tunnel_id = tunnel.get('id')
|
|
# Unlike the OVS plugin, ML2 doesn't return an id
|
|
# key. So use ip_address to form port name instead.
|
|
# Port name must be <=15 chars, so use shorter hex.
|
|
remote_ip = tunnel['ip_address']
|
|
remote_ip_hex = self.get_ip_in_hex(remote_ip)
|
|
if not tunnel_id and not remote_ip_hex:
|
|
continue
|
|
tun_name = '%s-%s' % (tunnel_type,
|
|
tunnel_id or remote_ip_hex)
|
|
self.setup_tunnel_port(tun_name,
|
|
tunnel['ip_address'],
|
|
tunnel_type)
|
|
except Exception as e:
|
|
LOG.debug(_("Unable to sync tunnel IP %(local_ip)s: %(e)s"),
|
|
{'local_ip': self.local_ip, 'e': e})
|
|
resync = True
|
|
return resync
|
|
|
|
def _agent_has_updates(self, polling_manager):
|
|
return (polling_manager.is_polling_required or
|
|
self.updated_ports or
|
|
self.sg_agent.firewall_refresh_needed())
|
|
|
|
def _port_info_has_changes(self, port_info):
|
|
return (port_info.get('added') or
|
|
port_info.get('removed') or
|
|
port_info.get('updated'))
|
|
|
|
def check_ovs_restart(self):
|
|
# Check for the canary flow
|
|
canary_flow = self.int_br.dump_flows_for_table(constants.CANARY_TABLE)
|
|
return not canary_flow
|
|
|
|
def rpc_loop(self, polling_manager=None):
|
|
if not polling_manager:
|
|
polling_manager = polling.AlwaysPoll()
|
|
|
|
sync = True
|
|
ports = set()
|
|
updated_ports_copy = set()
|
|
ancillary_ports = set()
|
|
tunnel_sync = True
|
|
ovs_restarted = False
|
|
while True:
|
|
start = time.time()
|
|
port_stats = {'regular': {'added': 0,
|
|
'updated': 0,
|
|
'removed': 0},
|
|
'ancillary': {'added': 0,
|
|
'removed': 0}}
|
|
LOG.debug(_("Agent rpc_loop - iteration:%d started"),
|
|
self.iter_num)
|
|
if sync:
|
|
LOG.info(_("Agent out of sync with plugin!"))
|
|
ports.clear()
|
|
ancillary_ports.clear()
|
|
sync = False
|
|
polling_manager.force_polling()
|
|
# Notify the plugin of tunnel IP
|
|
if self.enable_tunneling and tunnel_sync:
|
|
LOG.info(_("Agent tunnel out of sync with plugin!"))
|
|
try:
|
|
tunnel_sync = self.tunnel_sync()
|
|
except Exception:
|
|
LOG.exception(_("Error while synchronizing tunnels"))
|
|
tunnel_sync = True
|
|
ovs_restarted = self.check_ovs_restart()
|
|
if ovs_restarted:
|
|
self.setup_integration_br()
|
|
self.setup_physical_bridges(self.bridge_mappings)
|
|
if self.enable_tunneling:
|
|
self.setup_tunnel_br()
|
|
if self._agent_has_updates(polling_manager) or ovs_restarted:
|
|
try:
|
|
LOG.debug(_("Agent rpc_loop - iteration:%(iter_num)d - "
|
|
"starting polling. Elapsed:%(elapsed).3f"),
|
|
{'iter_num': self.iter_num,
|
|
'elapsed': time.time() - start})
|
|
# Save updated ports dict to perform rollback in
|
|
# case resync would be needed, and then clear
|
|
# self.updated_ports. As the greenthread should not yield
|
|
# between these two statements, this will be thread-safe
|
|
updated_ports_copy = self.updated_ports
|
|
self.updated_ports = set()
|
|
reg_ports = (set() if ovs_restarted else ports)
|
|
port_info = self.scan_ports(reg_ports, updated_ports_copy)
|
|
ports = port_info['current']
|
|
LOG.debug(_("Agent rpc_loop - iteration:%(iter_num)d - "
|
|
"port information retrieved. "
|
|
"Elapsed:%(elapsed).3f"),
|
|
{'iter_num': self.iter_num,
|
|
'elapsed': time.time() - start})
|
|
# Secure and wire/unwire VIFs and update their status
|
|
# on Neutron server
|
|
if (self._port_info_has_changes(port_info) or
|
|
self.sg_agent.firewall_refresh_needed() or
|
|
ovs_restarted):
|
|
LOG.debug(_("Starting to process devices in:%s"),
|
|
port_info)
|
|
# If treat devices fails - must resync with plugin
|
|
sync = self.process_network_ports(port_info,
|
|
ovs_restarted)
|
|
LOG.debug(_("Agent rpc_loop - iteration:%(iter_num)d -"
|
|
"ports processed. Elapsed:%(elapsed).3f"),
|
|
{'iter_num': self.iter_num,
|
|
'elapsed': time.time() - start})
|
|
port_stats['regular']['added'] = (
|
|
len(port_info.get('added', [])))
|
|
port_stats['regular']['updated'] = (
|
|
len(port_info.get('updated', [])))
|
|
port_stats['regular']['removed'] = (
|
|
len(port_info.get('removed', [])))
|
|
# Treat ancillary devices if they exist
|
|
if self.ancillary_brs:
|
|
port_info = self.update_ancillary_ports(
|
|
ancillary_ports)
|
|
LOG.debug(_("Agent rpc_loop - iteration:%(iter_num)d -"
|
|
"ancillary port info retrieved. "
|
|
"Elapsed:%(elapsed).3f"),
|
|
{'iter_num': self.iter_num,
|
|
'elapsed': time.time() - start})
|
|
|
|
if port_info:
|
|
rc = self.process_ancillary_network_ports(
|
|
port_info)
|
|
LOG.debug(_("Agent rpc_loop - iteration:"
|
|
"%(iter_num)d - ancillary ports "
|
|
"processed. Elapsed:%(elapsed).3f"),
|
|
{'iter_num': self.iter_num,
|
|
'elapsed': time.time() - start})
|
|
ancillary_ports = port_info['current']
|
|
port_stats['ancillary']['added'] = (
|
|
len(port_info.get('added', [])))
|
|
port_stats['ancillary']['removed'] = (
|
|
len(port_info.get('removed', [])))
|
|
sync = sync | rc
|
|
|
|
polling_manager.polling_completed()
|
|
except Exception:
|
|
LOG.exception(_("Error while processing VIF ports"))
|
|
# Put the ports back in self.updated_port
|
|
self.updated_ports |= updated_ports_copy
|
|
sync = True
|
|
|
|
# sleep till end of polling interval
|
|
elapsed = (time.time() - start)
|
|
LOG.debug(_("Agent rpc_loop - iteration:%(iter_num)d "
|
|
"completed. Processed ports statistics: "
|
|
"%(port_stats)s. Elapsed:%(elapsed).3f"),
|
|
{'iter_num': self.iter_num,
|
|
'port_stats': port_stats,
|
|
'elapsed': elapsed})
|
|
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})
|
|
self.iter_num = self.iter_num + 1
|
|
|
|
def daemon_loop(self):
|
|
with polling.get_polling_manager(
|
|
self.minimize_polling,
|
|
self.root_helper,
|
|
self.ovsdb_monitor_respawn_interval) as pm:
|
|
|
|
self.rpc_loop(polling_manager=pm)
|
|
|
|
|
|
def handle_sigterm(signum, frame):
|
|
sys.exit(1)
|
|
|
|
|
|
def create_agent_config_map(config):
|
|
"""Create a map of agent config parameters.
|
|
|
|
:param config: an instance of cfg.CONF
|
|
:returns: a map of agent configuration parameters
|
|
"""
|
|
try:
|
|
bridge_mappings = q_utils.parse_mappings(config.OVS.bridge_mappings)
|
|
except ValueError as e:
|
|
raise ValueError(_("Parsing bridge_mappings failed: %s.") % e)
|
|
|
|
kwargs = dict(
|
|
integ_br=config.OVS.integration_bridge,
|
|
tun_br=config.OVS.tunnel_bridge,
|
|
local_ip=config.OVS.local_ip,
|
|
bridge_mappings=bridge_mappings,
|
|
root_helper=config.AGENT.root_helper,
|
|
polling_interval=config.AGENT.polling_interval,
|
|
minimize_polling=config.AGENT.minimize_polling,
|
|
tunnel_types=config.AGENT.tunnel_types,
|
|
veth_mtu=config.AGENT.veth_mtu,
|
|
l2_population=config.AGENT.l2_population,
|
|
arp_responder=config.AGENT.arp_responder,
|
|
)
|
|
|
|
# If enable_tunneling is TRUE, set tunnel_type to default to GRE
|
|
if config.OVS.enable_tunneling and not kwargs['tunnel_types']:
|
|
kwargs['tunnel_types'] = [p_const.TYPE_GRE]
|
|
|
|
# Verify the tunnel_types specified are valid
|
|
for tun in kwargs['tunnel_types']:
|
|
if tun not in constants.TUNNEL_NETWORK_TYPES:
|
|
msg = _('Invalid tunnel type specified: %s'), tun
|
|
raise ValueError(msg)
|
|
if not kwargs['local_ip']:
|
|
msg = _('Tunneling cannot be enabled without a valid local_ip.')
|
|
raise ValueError(msg)
|
|
|
|
return kwargs
|
|
|
|
|
|
def main():
|
|
cfg.CONF.register_opts(ip_lib.OPTS)
|
|
common_config.init(sys.argv[1:])
|
|
common_config.setup_logging(cfg.CONF)
|
|
q_utils.log_opt_values(LOG)
|
|
|
|
try:
|
|
agent_config = create_agent_config_map(cfg.CONF)
|
|
except ValueError as e:
|
|
LOG.error(_('%s Agent terminated!'), e)
|
|
sys.exit(1)
|
|
|
|
is_xen_compute_host = 'rootwrap-xen-dom0' in agent_config['root_helper']
|
|
if is_xen_compute_host:
|
|
# Force ip_lib to always use the root helper to ensure that ip
|
|
# commands target xen dom0 rather than domU.
|
|
cfg.CONF.set_default('ip_lib_force_root', True)
|
|
|
|
agent = OVSNeutronAgent(**agent_config)
|
|
signal.signal(signal.SIGTERM, handle_sigterm)
|
|
|
|
# Start everything.
|
|
LOG.info(_("Agent initialized successfully, now running... "))
|
|
agent.daemon_loop()
|
|
sys.exit(0)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
main()
|