5aab6a5779
This option provides another way to attach to a specific bridge that is not quite equivalent with how bridge_mappings work in the L2 agent. This creates inconsistencies between how the L3 agent behaves when configured with a bridge_mapping and provider properties of the Neutron network vs. when it just ignores all L2 stuff and plugs itself directly into the bridge. See the bug report for more info. Change-Id: I37de3cd6eaaf34856fa72753f471f4f0a9381836 Closes-Bug: #1491668
199 lines
7.5 KiB
Python
199 lines
7.5 KiB
Python
# Copyright 2012, Nachi Ueno, NTT MCL, 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 shlex
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import socket
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import netaddr
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from oslo_config import cfg
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from oslo_log import log as logging
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from neutron.agent.linux import dhcp
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from neutron.agent.linux import ip_lib
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from neutron.agent.linux import utils
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from neutron.i18n import _LW
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LOG = logging.getLogger(__name__)
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DEVICE_OWNER_NETWORK_PROBE = 'network:probe'
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DEVICE_OWNER_COMPUTE_PROBE = 'compute:probe'
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class NeutronDebugAgent(object):
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OPTS = [
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# Needed for drivers
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cfg.StrOpt('external_network_bridge', default='br-ex',
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deprecated_for_removal=True,
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help=_("Name of bridge used for external network "
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"traffic.")),
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]
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def __init__(self, conf, client, driver):
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self.conf = conf
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self.client = client
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self.driver = driver
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def _get_namespace(self, port):
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return "qprobe-%s" % port.id
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def create_probe(self, network_id, device_owner='network'):
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network = self._get_network(network_id)
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bridge = None
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if network.external:
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bridge = self.conf.external_network_bridge
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port = self._create_port(network, device_owner)
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interface_name = self.driver.get_device_name(port)
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namespace = None
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if self.conf.use_namespaces:
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namespace = self._get_namespace(port)
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if ip_lib.device_exists(interface_name, namespace=namespace):
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LOG.debug('Reusing existing device: %s.', interface_name)
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else:
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self.driver.plug(network.id,
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port.id,
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interface_name,
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port.mac_address,
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bridge=bridge,
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namespace=namespace)
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ip_cidrs = []
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for fixed_ip in port.fixed_ips:
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subnet = fixed_ip.subnet
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net = netaddr.IPNetwork(subnet.cidr)
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ip_cidr = '%s/%s' % (fixed_ip.ip_address, net.prefixlen)
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ip_cidrs.append(ip_cidr)
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self.driver.init_l3(interface_name, ip_cidrs, namespace=namespace)
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return port
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def _get_subnet(self, subnet_id):
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subnet_dict = self.client.show_subnet(subnet_id)['subnet']
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return dhcp.DictModel(subnet_dict)
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def _get_network(self, network_id):
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network_dict = self.client.show_network(network_id)['network']
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network = dhcp.DictModel(network_dict)
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network.external = network_dict.get('router:external')
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obj_subnet = [self._get_subnet(s_id) for s_id in network.subnets]
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network.subnets = obj_subnet
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return network
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def clear_probes(self):
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"""Returns number of deleted probes"""
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ports = self.client.list_ports(
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device_id=socket.gethostname(),
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device_owner=[DEVICE_OWNER_NETWORK_PROBE,
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DEVICE_OWNER_COMPUTE_PROBE])
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info = ports['ports']
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for port in info:
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self.delete_probe(port['id'])
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return len(info)
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def delete_probe(self, port_id):
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port = dhcp.DictModel(self.client.show_port(port_id)['port'])
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network = self._get_network(port.network_id)
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bridge = None
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if network.external:
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bridge = self.conf.external_network_bridge
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ip = ip_lib.IPWrapper()
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namespace = self._get_namespace(port)
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if self.conf.use_namespaces and ip.netns.exists(namespace):
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self.driver.unplug(self.driver.get_device_name(port),
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bridge=bridge,
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namespace=namespace)
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try:
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ip.netns.delete(namespace)
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except Exception:
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LOG.warn(_LW('Failed to delete namespace %s'), namespace)
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else:
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self.driver.unplug(self.driver.get_device_name(port),
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bridge=bridge)
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self.client.delete_port(port.id)
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def list_probes(self):
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ports = self.client.list_ports(
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device_owner=[DEVICE_OWNER_NETWORK_PROBE,
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DEVICE_OWNER_COMPUTE_PROBE])
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info = ports['ports']
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for port in info:
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port['device_name'] = self.driver.get_device_name(
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dhcp.DictModel(port))
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return info
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def exec_command(self, port_id, command=None):
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port = dhcp.DictModel(self.client.show_port(port_id)['port'])
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ip = ip_lib.IPWrapper()
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namespace = self._get_namespace(port)
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if self.conf.use_namespaces:
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if not command:
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return "sudo ip netns exec %s" % self._get_namespace(port)
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namespace = ip.ensure_namespace(namespace)
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return namespace.netns.execute(shlex.split(command))
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else:
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return utils.execute(shlex.split(command))
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def ensure_probe(self, network_id):
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ports = self.client.list_ports(network_id=network_id,
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device_id=socket.gethostname(),
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device_owner=DEVICE_OWNER_NETWORK_PROBE)
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info = ports.get('ports', [])
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if info:
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return dhcp.DictModel(info[0])
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else:
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return self.create_probe(network_id)
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def ping_all(self, network_id=None, timeout=1):
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if network_id:
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ports = self.client.list_ports(network_id=network_id)['ports']
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else:
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ports = self.client.list_ports()['ports']
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result = ""
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for port in ports:
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probe = self.ensure_probe(port['network_id'])
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if port['device_owner'] == DEVICE_OWNER_NETWORK_PROBE:
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continue
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for fixed_ip in port['fixed_ips']:
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address = fixed_ip['ip_address']
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subnet = self._get_subnet(fixed_ip['subnet_id'])
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if subnet.ip_version == 4:
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ping_command = 'ping'
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else:
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ping_command = 'ping6'
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result += self.exec_command(probe.id,
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'%s -c 1 -w %s %s' % (ping_command,
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timeout,
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address))
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return result
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def _create_port(self, network, device_owner):
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host = self.conf.host
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body = {'port': {'admin_state_up': True,
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'network_id': network.id,
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'device_id': '%s' % socket.gethostname(),
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'device_owner': '%s:probe' % device_owner,
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'tenant_id': network.tenant_id,
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'binding:host_id': host,
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'fixed_ips': [dict(subnet_id=s.id)
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for s in network.subnets]}}
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port_dict = self.client.create_port(body)['port']
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port = dhcp.DictModel(port_dict)
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port.network = network
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for fixed_ip in port.fixed_ips:
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fixed_ip.subnet = self._get_subnet(fixed_ip.subnet_id)
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return port
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