x/vmware-nsx
Code Issues Proposed changes
Files
39b74e42ecdc0ea6aaeaed88c33f6be9070b35ab
vmware-nsx/quantum/plugins/linuxbridge/agent/linuxbridge_quantum_agent.py
Bob Kukura 88cd4f8504 add local network type and use by default for tenant networks 
Fixes bug 1045142.

This patch adds 'local' as a new value for provider:network_type,
supported by the openvswitch and linuxbridge plugins. Networks of this
type provide connectivity through a bridge for VMs and agents local to
the host, but no external connectivity. They do not require
provider:physical_network or provider:segmentation_id values. These
local networks are intended mainly to support single-box
zero-configuration testing (including quantum gating), but may have
other uses as well.

For openvswitch, the new OVS.tenant_network_type configuration
variable selects what type of networks are allocated as tenant
(i.e. non-provider) networks. It defaults to 'local', but must be
changed to 'vlan' or 'gre' for openvswitch tenant networks to have
external connectivity. The default value is intended to support
single-box zero-configuration testing without any need to allocate
physical network resources or configure bridges, and without requiring
the operating system to support OVS GRE tunneling. It can also be set
to 'none' to completely disable creation of tenant networks.

For linuxbridge, the new VLANS.tenant_network_type configuration
variable works similarly, with a value of 'vlan' supporting tenant
networks with external connectivity.

With either plugin, administrators can create provider local networks
by specifying "--provider:network_type local". Additionally, with
openvswitch, provider GRE networks can now be created by specifying
"--provider:network_type gre --provider:segmentation_id <tunnel-id>".

A corresponding devstack patch is available at
https://review.openstack.org/#/c/12456/. With this patch, the
openvswitch and linuxbridge plugins are by default configured to
support only local networks. A set of shell variables, documented in
stack.sh, can be set in localrc to configure remote connectivity,
including bridges/interfaces available for provider networks.

Change-Id: I2812548326141d2212d04f34d5448fb974d298e0
2012-09-07 21:42:01 -04:00

828 lines
33 KiB
Python
Executable File
Raw Blame History

#!/usr/bin/env python
# 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 Quantum.
# Based on the structure of the OpenVSwitch agent in the
# Quantum OpenVSwitch Plugin.
# @author: Sumit Naiksatam, Cisco Systems, Inc.
import logging
import os
import shlex
import signal
import subprocess
import sys
import time
import eventlet
import pyudev
from sqlalchemy.ext.sqlsoup import SqlSoup
from quantum.agent.linux import ip_lib
from quantum.agent.linux import utils
from quantum.agent import rpc as agent_rpc
from quantum.common import config as logging_config
from quantum.common import constants
from quantum.common import topics
from quantum.openstack.common import cfg
from quantum.openstack.common import context
from quantum.openstack.common import rpc
from quantum.openstack.common.rpc import dispatcher
from quantum.plugins.linuxbridge.common import config
from quantum.plugins.linuxbridge.common import constants as lconst
logging.basicConfig()
LOG = logging.getLogger(__name__)
BRIDGE_NAME_PREFIX = "brq"
GATEWAY_INTERFACE_PREFIX = "gw-"
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"
VLAN_BINDINGS = "vlan_bindings"
PORT_BINDINGS = "port_bindings"
class LinuxBridge:
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)
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
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
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
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
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
def get_all_quantum_bridges(self):
quantum_bridge_list = []
bridge_list = os.listdir(BRIDGE_FS)
for bridge in bridge_list:
if bridge.startswith(BRIDGE_NAME_PREFIX):
quantum_bridge_list.append(bridge)
return quantum_bridge_list
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)
def _get_prefixed_ip_link_devices(self, prefix):
prefixed_devices = []
retval = utils.execute(['ip', 'link'], root_helper=self.root_helper)
rows = retval.split('\n')
for row in rows:
values = row.split(':')
if (len(values) > 2):
value = values[1].strip(' ')
if (value.startswith(prefix)):
prefixed_devices.append(value)
return prefixed_devices
def _get_prefixed_tap_devices(self, prefix):
prefixed_devices = []
retval = utils.execute(['ip', 'tuntap'], root_helper=self.root_helper)
rows = retval.split('\n')
for row in rows:
split_row = row.split(':')
if split_row[0].startswith(prefix):
prefixed_devices.append(split_row[0])
return prefixed_devices
def get_all_tap_devices(self):
try:
return self._get_prefixed_tap_devices(TAP_INTERFACE_PREFIX)
except RuntimeError:
return self._get_prefixed_ip_link_devices(TAP_INTERFACE_PREFIX)
def get_all_gateway_devices(self):
try:
return self._get_prefixed_tap_devices(GATEWAY_INTERFACE_PREFIX)
except RuntimeError:
return self._get_prefixed_ip_link_devices(GATEWAY_INTERFACE_PREFIX)
def get_bridge_for_tap_device(self, tap_device_name):
bridges = self.get_all_quantum_bridges()
for bridge in bridges:
interfaces = self.get_interfaces_on_bridge(bridge)
if tap_device_name in interfaces:
return bridge
return None
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)
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)
self.ensure_bridge(bridge_name, interface)
return interface
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
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)
self.ensure_bridge(bridge_name, physical_interface, ips, gateway)
return physical_interface
def ensure_local_bridge(self, network_id):
"""Create a local bridge unless it already exists."""
bridge_name = self.get_bridge_name(network_id)
self.ensure_bridge(bridge_name)
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 %s for VLAN %s on interface %s" %
(interface, vlan_id, 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
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'])
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 %s for subinterface %s" % (bridge_name,
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 %s for subinterface %s" %
(bridge_name, interface))
if not interface:
return
# 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:
utils.execute(['brctl', 'addif', bridge_name, interface],
root_helper=self.root_helper)
except Exception as e:
LOG.error("Unable to add %s to %s! Exception: %s", interface,
bridge_name, e)
return
def add_tap_interface(self, network_id, physical_network, vlan_id,
tap_device_name):
"""
If a VIF has been plugged into a network, this function will
add the corresponding tap device to the relevant bridge
"""
if not tap_device_name:
return False
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
current_bridge_name = self.get_bridge_for_tap_device(tap_device_name)
bridge_name = self.get_bridge_name(network_id)
if bridge_name == current_bridge_name:
return False
LOG.debug("Adding device %s to bridge %s" % (tap_device_name,
bridge_name))
if current_bridge_name:
if utils.execute(['brctl', 'delif', current_bridge_name,
tap_device_name], root_helper=self.root_helper):
return False
if int(vlan_id) == lconst.LOCAL_VLAN_ID:
self.ensure_local_bridge(network_id)
else:
physical_interface = self.interface_mappings.get(physical_network)
if not physical_interface:
LOG.error("No mapping for physical network %s" %
physical_network)
return False
if int(vlan_id) == lconst.FLAT_VLAN_ID:
self.ensure_flat_bridge(network_id, physical_interface)
else:
self.ensure_vlan_bridge(network_id, physical_interface,
vlan_id)
if utils.execute(['brctl', 'addif', bridge_name, tap_device_name],
root_helper=self.root_helper):
return False
LOG.debug("Done adding device %s to bridge %s" % (tap_device_name,
bridge_name))
return True
def add_interface(self, network_id, physical_network, vlan_id,
interface_id):
if not interface_id:
"""
Since the VIF id is null, no VIF is plugged into this port
no more processing is required
"""
return False
if interface_id.startswith(GATEWAY_INTERFACE_PREFIX):
return self.add_tap_interface(network_id,
physical_network, vlan_id,
interface_id)
else:
tap_device_name = self.get_tap_device_name(interface_id)
return self.add_tap_interface(network_id,
physical_network, vlan_id,
tap_device_name)
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)
for physical_interface in self.interface_mappings.itervalues():
if physical_interface == interface:
# This is a flat network => return IP's from bridge to
# interface
ips, gateway = self.get_interface_details(bridge_name)
self.update_interface_ip_details(interface,
bridge_name,
ips, gateway)
else:
if interface.startswith(physical_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)
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 %s from bridge %s" %
(interface_name, bridge_name))
if utils.execute(['brctl', 'delif', bridge_name, interface_name],
root_helper=self.root_helper):
return False
LOG.debug("Done removing device %s from bridge %s" %
(interface_name, bridge_name))
return True
else:
LOG.debug("Cannot remove device %s, bridge %s does not exist" %
(interface_name, bridge_name))
return False
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)
class LinuxBridgeRpcCallbacks():
# Set RPC API version to 1.0 by default.
RPC_API_VERSION = '1.0'
def __init__(self, context, linux_br):
self.context = context
self.linux_br = linux_br
def network_delete(self, context, **kwargs):
LOG.debug("network_delete received")
network_id = kwargs.get('network_id')
bridge_name = self.linux_br.get_bridge_name(network_id)
LOG.debug("Delete %s", bridge_name)
self.linux_br.delete_vlan_bridge(bridge_name)
def port_update(self, context, **kwargs):
LOG.debug("port_update received")
port = kwargs.get('port')
if port['admin_state_up']:
vlan_id = kwargs.get('vlan_id')
# create the networking for the port
self.linux_br.add_interface(port['network_id'],
vlan_id,
port['id'])
else:
bridge_name = self.linux_br.get_bridge_name(port['network_id'])
tap_device_name = self.linux_br.get_tap_device_name(port['id'])
self.linux_br.remove_interface(bridge_name, tap_device_name)
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])
class LinuxBridgeQuantumAgentDB:
def __init__(self, interface_mappings, polling_interval,
reconnect_interval, root_helper, db_connection_url):
self.polling_interval = polling_interval
self.root_helper = root_helper
self.setup_linux_bridge(interface_mappings)
self.reconnect_interval = reconnect_interval
self.db_connected = False
self.db_connection_url = db_connection_url
def setup_linux_bridge(self, interface_mappings):
self.linux_br = LinuxBridge(interface_mappings, self.root_helper)
def process_port_binding(self, network_id, interface_id,
physical_network, vlan_id):
return self.linux_br.add_interface(network_id,
physical_network, vlan_id,
interface_id)
def remove_port_binding(self, network_id, interface_id):
bridge_name = self.linux_br.get_bridge_name(network_id)
tap_device_name = self.linux_br.get_tap_device_name(interface_id)
return self.linux_br.remove_interface(bridge_name, tap_device_name)
def process_unplugged_interfaces(self, plugged_interfaces):
"""
If there are any tap devices that are not corresponding to the
list of attached VIFs, then those are corresponding to recently
unplugged VIFs, so we need to remove those tap devices from their
current bridge association
"""
plugged_tap_device_names = []
plugged_gateway_device_names = []
for interface in plugged_interfaces:
if interface.startswith(GATEWAY_INTERFACE_PREFIX):
"""
The name for the gateway devices is set by the linux net
driver, hence we use the name as is
"""
plugged_gateway_device_names.append(interface)
else:
tap_device_name = self.linux_br.get_tap_device_name(interface)
plugged_tap_device_names.append(tap_device_name)
LOG.debug("plugged tap device names %s" % plugged_tap_device_names)
for tap_device in self.linux_br.get_all_tap_devices():
if tap_device not in plugged_tap_device_names:
current_bridge_name = (
self.linux_br.get_bridge_for_tap_device(tap_device))
if current_bridge_name:
self.linux_br.remove_interface(current_bridge_name,
tap_device)
for gw_device in self.linux_br.get_all_gateway_devices():
if gw_device not in plugged_gateway_device_names:
current_bridge_name = (
self.linux_br.get_bridge_for_tap_device(gw_device))
if current_bridge_name:
self.linux_br.remove_interface(current_bridge_name,
gw_device)
def process_deleted_networks(self, vlan_bindings):
current_quantum_networks = vlan_bindings.keys()
current_quantum_bridge_names = []
for network in current_quantum_networks:
bridge_name = self.linux_br.get_bridge_name(network)
current_quantum_bridge_names.append(bridge_name)
quantum_bridges_on_this_host = self.linux_br.get_all_quantum_bridges()
for bridge in quantum_bridges_on_this_host:
if bridge not in current_quantum_bridge_names:
self.linux_br.delete_vlan_bridge(bridge)
def manage_networks_on_host(self, db,
old_vlan_bindings,
old_port_bindings):
vlan_bindings = {}
try:
network_binds = db.network_bindings.all()
except Exception as e:
LOG.info("Unable to get network bindings! Exception: %s" % e)
self.db_connected = False
return {VLAN_BINDINGS: {},
PORT_BINDINGS: []}
vlans_string = ""
for bind in network_binds:
entry = {'network_id': bind.network_id,
'physical_network': bind.physical_network,
'vlan_id': bind.vlan_id}
vlan_bindings[bind.network_id] = entry
vlans_string = "%s %s" % (vlans_string, entry)
port_bindings = []
try:
port_binds = db.ports.all()
except Exception as e:
LOG.info("Unable to get port bindings! Exception: %s" % e)
self.db_connected = False
return {VLAN_BINDINGS: {},
PORT_BINDINGS: []}
all_bindings = {}
for bind in port_binds:
append_entry = False
all_bindings[bind.id] = bind
entry = {'network_id': bind.network_id,
'uuid': bind.id,
'status': bind.status,
'interface_id': bind.id}
append_entry = bind.admin_state_up
if append_entry:
port_bindings.append(entry)
plugged_interfaces = []
ports_string = ""
for pb in port_bindings:
ports_string = "%s %s" % (ports_string, pb)
port_id = pb['uuid']
interface_id = pb['interface_id']
network_id = pb['network_id']
physical_network = vlan_bindings[network_id]['physical_network']
vlan_id = str(vlan_bindings[network_id]['vlan_id'])
if self.process_port_binding(network_id,
interface_id,
physical_network,
vlan_id):
all_bindings[port_id].status = constants.PORT_STATUS_ACTIVE
plugged_interfaces.append(interface_id)
if old_port_bindings != port_bindings:
LOG.debug("Port-bindings: %s" % ports_string)
self.process_unplugged_interfaces(plugged_interfaces)
if old_vlan_bindings != vlan_bindings:
LOG.debug("VLAN-bindings: %s" % vlans_string)
self.process_deleted_networks(vlan_bindings)
try:
db.commit()
except Exception as e:
LOG.info("Unable to update database! Exception: %s" % e)
db.rollback()
vlan_bindings = {}
port_bindings = []
return {VLAN_BINDINGS: vlan_bindings,
PORT_BINDINGS: port_bindings}
def daemon_loop(self):
old_vlan_bindings = {}
old_port_bindings = []
self.db_connected = False
while True:
if not self.db_connected:
time.sleep(self.reconnect_interval)
db = SqlSoup(self.db_connection_url)
self.db_connected = True
LOG.info("Connecting to database \"%s\" on %s" %
(db.engine.url.database, db.engine.url.host))
bindings = self.manage_networks_on_host(db,
old_vlan_bindings,
old_port_bindings)
old_vlan_bindings = bindings[VLAN_BINDINGS]
old_port_bindings = bindings[PORT_BINDINGS]
time.sleep(self.polling_interval)
class LinuxBridgeQuantumAgentRPC:
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)
self.setup_rpc(interface_mappings.values())
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 of any device for agent_id")
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 = agent_rpc.PluginApi(topics.PLUGIN)
# RPC network init
self.context = context.RequestContext('quantum', 'quantum',
is_admin=False)
# Handle updates from service
self.callbacks = LinuxBridgeRpcCallbacks(self.context,
self.linux_br)
self.dispatcher = self.callbacks.create_rpc_dispatcher()
# Define the listening consumers for the agent
consumers = [[topics.PORT, topics.UPDATE],
[topics.NETWORK, topics.DELETE]]
self.connection = agent_rpc.create_consumers(self.dispatcher,
self.topic,
consumers)
self.udev = pyudev.Context()
monitor = pyudev.Monitor.from_netlink(self.udev)
monitor.filter_by('net')
def setup_linux_bridge(self, interface_mappings):
self.linux_br = LinuxBridge(interface_mappings, self.root_helper)
def process_port_binding(self, network_id, interface_id,
physical_network, vlan_id):
return self.linux_br.add_interface(network_id,
physical_network, vlan_id,
interface_id)
def remove_port_binding(self, network_id, interface_id):
bridge_name = self.linux_br.get_bridge_name(network_id)
tap_device_name = self.linux_br.get_tap_device_name(interface_id)
return self.linux_br.remove_interface(bridge_name, tap_device_name)
def update_devices(self, registered_devices):
devices = self.udev_get_all_tap_devices()
if devices == registered_devices:
return
added = devices - registered_devices
removed = registered_devices - devices
return {'current': devices,
'added': added,
'removed': removed}
def udev_get_all_tap_devices(self):
devices = set()
for device in self.udev.list_devices(subsystem='net'):
name = self.udev_get_name(device)
if self.is_tap_device(name):
devices.add(name)
return devices
def is_tap_device(self, name):
return name.startswith(TAP_INTERFACE_PREFIX)
def udev_get_name(self, device):
return device.sys_name
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)
def treat_devices_added(self, devices):
resync = False
for device in devices:
LOG.info("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 %s: %s", device, e)
resync = True
continue
if 'port_id' in details:
LOG.info("Port %s updated. Details: %s", device, details)
if details['admin_state_up']:
# create the networking for the port
self.process_port_binding(details['network_id'],
details['port_id'],
details['physical_network'],
details['vlan_id'])
else:
self.remove_port_binding(details['network_id'],
details['port_id'])
else:
LOG.debug("Device %s not defined on plugin", device)
return resync
def treat_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)
except Exception as e:
LOG.debug("port_removed failed for %s: %s", device, e)
resync = True
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 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 = self.update_devices(devices)
# 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']
# 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 (%s vs. %s)!",
self.polling_interval, elapsed)
def main():
eventlet.monkey_patch()
cfg.CONF(args=sys.argv, project='quantum')
# (TODO) gary - swap with common logging
logging_config.setup_logging(cfg.CONF)
interface_mappings = {}
for mapping in cfg.CONF.LINUX_BRIDGE.physical_interface_mappings:
try:
physical_network, physical_interface = mapping.split(':')
interface_mappings[physical_network] = physical_interface
LOG.debug("physical network %s mapped to physical interface %s" %
(physical_network, physical_interface))
except ValueError as ex:
LOG.error("Invalid physical interface mapping: \'%s\' - %s" %
(mapping, ex))
sys.exit(1)
polling_interval = cfg.CONF.AGENT.polling_interval
reconnect_interval = cfg.CONF.DATABASE.reconnect_interval
root_helper = cfg.CONF.AGENT.root_helper
rpc = cfg.CONF.AGENT.rpc
if rpc:
plugin = LinuxBridgeQuantumAgentRPC(interface_mappings,
polling_interval,
root_helper)
else:
db_connection_url = cfg.CONF.DATABASE.sql_connection
plugin = LinuxBridgeQuantumAgentDB(interface_mappings,
polling_interval,
reconnect_interval,
root_helper,
db_connection_url)
LOG.info("Agent initialized successfully, now running... ")
plugin.daemon_loop()
sys.exit(0)
if __name__ == "__main__":
main()
View Git Blame Copy Permalink