7cefc360c5
H302 violation is reported by flake8 when importing separated objects from
modules instead of importing the whole module.
e.g. from package.module import function
function()
is changed to
from package import module
module.function()
Change-Id: Ifbf31b52316d3cade40743752a49ce700f384a21
Closes-Bug: #1291032
199 lines
7.6 KiB
Python
199 lines
7.6 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# 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 neutron.agent.common import config
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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.openstack.common import log as logging
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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():
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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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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.root_helper = config.get_root_helper(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, self.root_helper, 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_probe(self):
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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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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(self.root_helper)
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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(_('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(self.root_helper)
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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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