185 lines
7.1 KiB
Python
185 lines
7.1 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 neutron_lib.api.definitions import portbindings
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from neutron_lib import constants
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from oslo_log import log as logging
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from neutron._i18n import _LW
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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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LOG = logging.getLogger(__name__)
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DEVICE_OWNER_NETWORK_PROBE = constants.DEVICE_OWNER_NETWORK_PREFIX + 'probe'
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DEVICE_OWNER_COMPUTE_PROBE = constants.DEVICE_OWNER_COMPUTE_PREFIX + 'probe'
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class NeutronDebugAgent(object):
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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 = 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 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.warning(_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 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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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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portbindings.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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