OpenStack Networking (Neutron)
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# Copyright 2015 Red Hat, Inc.
#
# 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.
import datetime
from distutils import version
import functools
import os
import random
from neutron_lib.agent import topics
from neutron_lib import constants
from neutron_lib import context
from oslo_utils import timeutils
import neutron
from neutron.agent.common import ovs_lib
from neutron.db import agents_db
HOST = 'localhost'
DEFAULT_AZ = 'nova'
def find_file(filename, path):
"""Find a file with name 'filename' located in 'path'."""
for root, _, files in os.walk(path):
if filename in files:
return os.path.abspath(os.path.join(root, filename))
def find_sample_file(filename):
"""Find a file with name 'filename' located in the sample directory."""
return find_file(
filename,
path=os.path.join(neutron.__path__[0], '..', 'etc'))
def get_test_log_path():
return os.environ.get('OS_LOG_PATH', '/tmp')
class FakePlugin(agents_db.AgentDbMixin):
pass
def _get_l3_agent_dict(host, agent_mode, internal_only=True,
az=DEFAULT_AZ):
return {
'agent_type': constants.AGENT_TYPE_L3,
'binary': 'neutron-l3-agent',
'host': host,
'topic': topics.L3_AGENT,
'availability_zone': az,
'configurations': {'agent_mode': agent_mode,
'handle_internal_only_routers': internal_only}}
def _register_agent(agent, plugin=None):
if not plugin:
plugin = FakePlugin()
admin_context = context.get_admin_context()
plugin.create_or_update_agent(admin_context, agent, timeutils.utcnow())
return plugin._get_agent_by_type_and_host(
admin_context, agent['agent_type'], agent['host'])
def register_l3_agent(host=HOST, agent_mode=constants.L3_AGENT_MODE_LEGACY,
internal_only=True, az=DEFAULT_AZ):
agent = _get_l3_agent_dict(host, agent_mode, internal_only, az)
return _register_agent(agent)
def _get_dhcp_agent_dict(host, networks=0, az=DEFAULT_AZ):
agent = {
'binary': 'neutron-dhcp-agent',
'host': host,
'topic': topics.DHCP_AGENT,
'agent_type': constants.AGENT_TYPE_DHCP,
'availability_zone': az,
'configurations': {'dhcp_driver': 'dhcp_driver',
'networks': networks}}
return agent
def register_dhcp_agent(host=HOST, networks=0, admin_state_up=True,
alive=True, az=DEFAULT_AZ):
agent = _register_agent(
_get_dhcp_agent_dict(host, networks, az=az))
if not admin_state_up:
set_agent_admin_state(agent['id'])
if not alive:
kill_agent(agent['id'])
return FakePlugin()._get_agent_by_type_and_host(
context.get_admin_context(), agent['agent_type'], agent['host'])
def kill_agent(agent_id):
hour_ago = timeutils.utcnow() - datetime.timedelta(hours=1)
FakePlugin().update_agent(
context.get_admin_context(),
agent_id,
{'agent': {
'started_at': hour_ago,
'heartbeat_timestamp': hour_ago}})
def revive_agent(agent_id):
now = timeutils.utcnow()
FakePlugin().update_agent(
context.get_admin_context(), agent_id,
{'agent': {'started_at': now, 'heartbeat_timestamp': now}})
def set_agent_admin_state(agent_id, admin_state_up=False):
FakePlugin().update_agent(
context.get_admin_context(),
agent_id,
{'agent': {'admin_state_up': admin_state_up}})
def _get_l2_agent_dict(host, agent_type, binary, tunnel_types=None,
tunneling_ip='20.0.0.1', interface_mappings=None,
bridge_mappings=None, l2pop_network_types=None,
device_mappings=None, start_flag=True,
integration_bridge=None):
agent = {
'binary': binary,
'host': host,
'topic': constants.L2_AGENT_TOPIC,
'configurations': {},
'agent_type': agent_type,
'tunnel_type': [],
'start_flag': start_flag}
if tunnel_types is not None:
agent['configurations']['tunneling_ip'] = tunneling_ip
agent['configurations']['tunnel_types'] = tunnel_types
if bridge_mappings is not None:
agent['configurations']['bridge_mappings'] = bridge_mappings
if interface_mappings is not None:
agent['configurations']['interface_mappings'] = interface_mappings
if l2pop_network_types is not None:
agent['configurations']['l2pop_network_types'] = l2pop_network_types
if device_mappings is not None:
agent['configurations']['device_mappings'] = device_mappings
if integration_bridge is not None:
agent['configurations']['integration_bridge'] = integration_bridge
return agent
def register_ovs_agent(host=HOST, agent_type=constants.AGENT_TYPE_OVS,
binary='neutron-openvswitch-agent',
tunnel_types=['vxlan'], tunneling_ip='20.0.0.1',
interface_mappings=None, bridge_mappings=None,
l2pop_network_types=None, plugin=None, start_flag=True,
integration_bridge=None):
agent = _get_l2_agent_dict(host, agent_type, binary, tunnel_types,
tunneling_ip, interface_mappings,
bridge_mappings, l2pop_network_types,
start_flag=start_flag,
integration_bridge=integration_bridge)
return _register_agent(agent, plugin)
def register_linuxbridge_agent(host=HOST,
agent_type=constants.AGENT_TYPE_LINUXBRIDGE,
binary='neutron-linuxbridge-agent',
tunnel_types=['vxlan'], tunneling_ip='20.0.0.1',
interface_mappings=None, bridge_mappings=None,
plugin=None):
agent = _get_l2_agent_dict(host, agent_type, binary, tunnel_types,
tunneling_ip=tunneling_ip,
interface_mappings=interface_mappings,
bridge_mappings=bridge_mappings)
return _register_agent(agent, plugin)
def register_macvtap_agent(host=HOST,
agent_type=constants.AGENT_TYPE_MACVTAP,
binary='neutron-macvtap-agent',
interface_mappings=None, plugin=None):
agent = _get_l2_agent_dict(host, agent_type, binary,
interface_mappings=interface_mappings)
return _register_agent(agent, plugin)
def register_sriovnicswitch_agent(host=HOST,
agent_type=constants.AGENT_TYPE_NIC_SWITCH,
binary='neutron-sriov-nic-agent',
device_mappings=None, plugin=None):
agent = _get_l2_agent_dict(host, agent_type, binary,
device_mappings=device_mappings)
return _register_agent(agent, plugin)
def get_not_used_vlan(bridge, vlan_range):
port_vlans = bridge.ovsdb.db_find(
'Port', ('tag', '!=', []), columns=['tag']).execute()
used_vlan_tags = {val['tag'] for val in port_vlans}
available_vlans = vlan_range - used_vlan_tags
return random.choice(list(available_vlans))
def skip_if_ovs_older_than(ovs_version):
"""Decorator for test method to skip if OVS version doesn't meet
minimal requirement.
"""
def skip_if_bad_ovs(f):
@functools.wraps(f)
def check_ovs_and_skip(test):
ovs = ovs_lib.BaseOVS()
current_ovs_version = version.StrictVersion(
ovs.config['ovs_version'])
if current_ovs_version < version.StrictVersion(ovs_version):
test.skipTest("This test requires OVS version %s or higher." %
ovs_version)
return f(test)
return check_ovs_and_skip
return skip_if_bad_ovs