7811e2a7c3
This plugin supports multiple plugins at same time. This plugin is for L3 connectivility between networks which are realized by different plugins. This plugin add new attribute 'flavor:id'. flavor:id correspond to specific plugin. flavor-plugin mapping could be configureable by plugin_list config. This plugin also support extensions. We can map extension to plugin by using extension_map config. Implements blueprint metaplugin Change-Id: Ia94d2349fb3ce9f121bbd2505324ae6f0c34247a
277 lines
10 KiB
Python
277 lines
10 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2012 OpenStack LLC
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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 abc
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import logging
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import netaddr
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from quantum.agent.linux import ip_lib
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from quantum.agent.linux import ovs_lib
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from quantum.agent.linux import utils
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from quantum.openstack.common import cfg
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from quantum.openstack.common import importutils
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LOG = logging.getLogger(__name__)
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OPTS = [
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cfg.StrOpt('ovs_integration_bridge',
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default='br-int',
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help='Name of Open vSwitch bridge to use'),
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cfg.StrOpt('network_device_mtu',
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help='MTU setting for device.'),
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cfg.StrOpt('ryu_api_host',
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default='127.0.0.1:8080',
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help='Openflow Ryu REST API host:port'),
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cfg.StrOpt('meta_flavor_driver_mappings',
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help='Mapping between flavor and LinuxInterfaceDriver')
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]
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class LinuxInterfaceDriver(object):
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__metaclass__ = abc.ABCMeta
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# from linux IF_NAMESIZE
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DEV_NAME_LEN = 14
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DEV_NAME_PREFIX = 'tap'
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def __init__(self, conf):
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self.conf = conf
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def init_l3(self, device_name, ip_cidrs, namespace=None):
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"""Set the L3 settings for the interface using data from the port.
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ip_cidrs: list of 'X.X.X.X/YY' strings
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"""
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device = ip_lib.IPDevice(device_name, self.conf.root_helper,
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namespace=namespace)
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previous = {}
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for address in device.addr.list(scope='global', filters=['permanent']):
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previous[address['cidr']] = address['ip_version']
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# add new addresses
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for ip_cidr in ip_cidrs:
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net = netaddr.IPNetwork(ip_cidr)
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if ip_cidr in previous:
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del previous[ip_cidr]
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continue
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device.addr.add(net.version, ip_cidr, str(net.broadcast))
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# clean up any old addresses
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for ip_cidr, ip_version in previous.items():
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device.addr.delete(ip_version, ip_cidr)
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def check_bridge_exists(self, bridge):
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if not ip_lib.device_exists(bridge):
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raise exceptions.BridgeDoesNotExist(bridge=bridge)
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def get_device_name(self, port):
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return (self.DEV_NAME_PREFIX + port.id)[:self.DEV_NAME_LEN]
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@abc.abstractmethod
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def plug(self, network_id, port_id, device_name, mac_address,
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bridge=None, namespace=None):
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"""Plug in the interface."""
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@abc.abstractmethod
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def unplug(self, device_name, bridge=None):
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"""Unplug the interface."""
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class NullDriver(LinuxInterfaceDriver):
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def plug(self, network_id, port_id, device_name, mac_address,
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bridge=None, namespace=None):
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pass
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def unplug(self, device_name, bridge=None):
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pass
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class OVSInterfaceDriver(LinuxInterfaceDriver):
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"""Driver for creating an internal interface on an OVS bridge."""
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def plug(self, network_id, port_id, device_name, mac_address,
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bridge=None, namespace=None):
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"""Plug in the interface."""
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if not bridge:
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bridge = self.conf.ovs_integration_bridge
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self.check_bridge_exists(bridge)
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if not ip_lib.device_exists(device_name,
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self.conf.root_helper,
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namespace=namespace):
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utils.execute(['ovs-vsctl',
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'--', '--may-exist', 'add-port', bridge,
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device_name,
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'--', 'set', 'Interface', device_name,
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'type=internal',
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'--', 'set', 'Interface', device_name,
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'external-ids:iface-id=%s' % port_id,
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'--', 'set', 'Interface', device_name,
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'external-ids:iface-status=active',
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'--', 'set', 'Interface', device_name,
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'external-ids:attached-mac=%s' %
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mac_address],
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self.conf.root_helper)
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ip = ip_lib.IPWrapper(self.conf.root_helper)
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device = ip.device(device_name)
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device.link.set_address(mac_address)
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if self.conf.network_device_mtu:
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device.link.set_mtu(self.conf.network_device_mtu)
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if namespace:
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namespace_obj = ip.ensure_namespace(namespace)
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namespace_obj.add_device_to_namespace(device)
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device.link.set_up()
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def unplug(self, device_name, bridge=None):
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"""Unplug the interface."""
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if not bridge:
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bridge = self.conf.ovs_integration_bridge
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self.check_bridge_exists(bridge)
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bridge = ovs_lib.OVSBridge(bridge, self.conf.root_helper)
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bridge.delete_port(device_name)
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class BridgeInterfaceDriver(LinuxInterfaceDriver):
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"""Driver for creating bridge interfaces."""
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DEV_NAME_PREFIX = 'dhc'
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def plug(self, network_id, port_id, device_name, mac_address,
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bridge=None, namespace=None):
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"""Plugin the interface."""
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if not ip_lib.device_exists(device_name,
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self.conf.root_helper,
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namespace=namespace):
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ip = ip_lib.IPWrapper(self.conf.root_helper)
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tap_name = device_name.replace(self.DEV_NAME_PREFIX, 'tap')
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root_veth, dhcp_veth = ip.add_veth(tap_name, device_name)
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root_veth.link.set_address(mac_address)
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if namespace:
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namespace_obj = ip.ensure_namespace(namespace)
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namespace_obj.add_device_to_namespace(dhcp_veth)
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root_veth.link.set_up()
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dhcp_veth.link.set_up()
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else:
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LOG.warn(_("Device %s already exists") % device_name)
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def unplug(self, device_name, bridge=None):
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"""Unplug the interface."""
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device = ip_lib.IPDevice(device_name, self.conf.root_helper)
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try:
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device.link.delete()
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LOG.debug(_("Unplugged interface '%s'") % device_name)
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except RuntimeError:
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LOG.error(_("Failed unplugging interface '%s'") %
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device_name)
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class RyuInterfaceDriver(OVSInterfaceDriver):
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"""Driver for creating a Ryu OVS interface."""
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def __init__(self, conf):
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super(RyuInterfaceDriver, self).__init__(conf)
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from ryu.app.client import OFPClient
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LOG.debug('ryu rest host %s', self.conf.ryu_api_host)
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self.ryu_client = OFPClient(self.conf.ryu_api_host)
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def plug(self, network_id, port_id, device_name, mac_address,
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bridge=None, namespace=None):
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"""Plug in the interface."""
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super(RyuInterfaceDriver, self).plug(network_id, port_id, device_name,
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mac_address, bridge=bridge,
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namespace=namespace)
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if not bridge:
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bridge = self.conf.ovs_integration_bridge
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self.check_bridge_exists(bridge)
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ovs_br = ovs_lib.OVSBridge(bridge, self.conf.root_helper)
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datapath_id = ovs_br.get_datapath_id()
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port_no = ovs_br.get_port_ofport(device_name)
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self.ryu_client.create_port(network_id, datapath_id, port_no)
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class MetaInterfaceDriver(LinuxInterfaceDriver):
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def __init__(self, conf):
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super(MetaInterfaceDriver, self).__init__(conf)
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from quantumclient.v2_0 import client
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self.quantum = client.Client(
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username=self.conf.admin_user,
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password=self.conf.admin_password,
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tenant_name=self.conf.admin_tenant_name,
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auth_url=self.conf.auth_url,
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auth_strategy=self.conf.auth_strategy,
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auth_region=self.conf.auth_region
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)
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self.flavor_driver_map = {}
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for flavor, driver_name in [
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driver_set.split(':')
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for driver_set in
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self.conf.meta_flavor_driver_mappings.split(',')]:
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self.flavor_driver_map[flavor] =\
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self._load_driver(driver_name)
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def _get_driver_by_network_id(self, network_id):
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network = self.quantum.show_network(network_id)
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flavor = network['network']['flavor:id']
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return self.flavor_driver_map[flavor]
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def _get_driver_by_device_name(self, device_name):
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device = ip_lib.IPDevice(device_name, self.conf.root_helper)
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mac_address = device.link.address
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ports = self.quantum.list_ports(mac_address=mac_address)
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if not 'ports' in ports or len(ports['ports']) < 1:
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raise Exception('No port for this device %s' % device_name)
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return self._get_driver_by_network_id(ports['ports'][0]['network_id'])
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def get_device_name(self, port):
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driver = self._get_driver_by_network_id(port.network_id)
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return driver.get_device_name(port)
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def plug(self, network_id, port_id, device_name, mac_address):
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driver = self._get_driver_by_network_id(network_id)
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return driver.plug(network_id, port_id, device_name, mac_address)
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def unplug(self, device_name):
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driver = self._get_driver_by_device_name(device_name)
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return driver.unplug(device_name)
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def _load_driver(self, driver_provider):
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LOG.debug("Driver location:%s", driver_provider)
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# If the plugin can't be found let them know gracefully
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try:
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LOG.info("Loading Driver: %s" % driver_provider)
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plugin_klass = importutils.import_class(driver_provider)
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except ClassNotFound:
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LOG.exception("Error loading driver")
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raise Exception("driver_provider not found. You can install a "
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"Driver with: pip install <plugin-name>\n"
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"Example: pip install quantum-sample-driver")
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return plugin_klass(self.conf)
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