623 lines
26 KiB
Python
623 lines
26 KiB
Python
# Copyright (c) 2015 Red Hat, 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 collections
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from operator import attrgetter
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from neutron_lib.api.definitions import provider_net as providernet
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from neutron_lib import constants
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from neutron_lib import context
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from oslo_utils import uuidutils
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import testscenarios
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from neutron.db import agents_db
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from neutron.db import agentschedulers_db
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from neutron.db import common_db_mixin
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from neutron.objects import network
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from neutron.scheduler import dhcp_agent_scheduler
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from neutron.tests.common import helpers
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from neutron.tests.unit.plugins.ml2 import test_plugin
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from neutron.tests.unit.scheduler import (test_dhcp_agent_scheduler as
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test_dhcp_sch)
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# Required to generate tests from scenarios. Not compatible with nose.
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load_tests = testscenarios.load_tests_apply_scenarios
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class BaseTestScheduleNetwork(object):
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"""Base class which defines scenarios for schedulers.
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agent_count
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Number of dhcp agents (also number of hosts).
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max_agents_per_network
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Maximum DHCP Agents that can be scheduled for a network.
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scheduled_agent_count
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Number of agents the network has previously scheduled
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down_agent_count
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Number of dhcp agents which are down
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expected_scheduled_agent_count
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Number of scheduled agents the schedule() should return
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or 'None' if the schedule() cannot schedule the network.
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"""
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scenarios = [
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('No agents scheduled if no agents are present',
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dict(agent_count=0,
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max_agents_per_network=1,
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scheduled_agent_count=0,
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down_agent_count=0,
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expected_scheduled_agent_count=None)),
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('No agents scheduled if network already hosted and'
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' max_agents_per_network reached',
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dict(agent_count=1,
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max_agents_per_network=1,
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scheduled_agent_count=1,
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down_agent_count=0,
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expected_scheduled_agent_count=None)),
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('No agents scheduled if all agents are down',
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dict(agent_count=2,
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max_agents_per_network=1,
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scheduled_agent_count=0,
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down_agent_count=2,
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expected_scheduled_agent_count=None)),
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('Agent scheduled to the network if network is not yet hosted',
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dict(agent_count=1,
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max_agents_per_network=1,
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scheduled_agent_count=0,
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down_agent_count=0,
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expected_scheduled_agent_count=1)),
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('Additional Agents scheduled to the network if max_agents_per_network'
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' is not yet reached',
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dict(agent_count=3,
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max_agents_per_network=3,
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scheduled_agent_count=1,
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down_agent_count=0,
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expected_scheduled_agent_count=2)),
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('No agent scheduled if agent is dead',
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dict(agent_count=3,
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max_agents_per_network=3,
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scheduled_agent_count=1,
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down_agent_count=1,
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expected_scheduled_agent_count=1)),
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]
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class TestChanceScheduleNetwork(test_dhcp_sch.TestDhcpSchedulerBaseTestCase,
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agentschedulers_db.DhcpAgentSchedulerDbMixin,
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agents_db.AgentDbMixin,
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common_db_mixin.CommonDbMixin,
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BaseTestScheduleNetwork):
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"""Test various scenarios for ChanceScheduler.schedule."""
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def test_schedule_network(self):
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self.config(dhcp_agents_per_network=self.max_agents_per_network)
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scheduler = dhcp_agent_scheduler.ChanceScheduler()
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# create dhcp agents
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hosts = ['host-%s' % i for i in range(self.agent_count)]
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dhcp_agents = self._create_and_set_agents_down(
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hosts, down_agent_count=self.down_agent_count)
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active_agents = dhcp_agents[self.down_agent_count:]
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# schedule some agents before calling schedule
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if self.scheduled_agent_count:
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# schedule the network
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schedule_agents = active_agents[:self.scheduled_agent_count]
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scheduler.resource_filter.bind(self.ctx,
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schedule_agents, self.network_id)
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actual_scheduled_agents = scheduler.schedule(self, self.ctx,
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self.network)
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if self.expected_scheduled_agent_count:
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self.assertEqual(self.expected_scheduled_agent_count,
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len(actual_scheduled_agents))
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hosted_agents = self.list_dhcp_agents_hosting_network(
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self.ctx, self.network_id)
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self.assertEqual(self.scheduled_agent_count +
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len(actual_scheduled_agents),
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len(hosted_agents['agents']))
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else:
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self.assertEqual([], actual_scheduled_agents)
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class TestWeightScheduleNetwork(test_dhcp_sch.TestDhcpSchedulerBaseTestCase,
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agentschedulers_db.DhcpAgentSchedulerDbMixin,
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agents_db.AgentDbMixin,
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common_db_mixin.CommonDbMixin,
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BaseTestScheduleNetwork):
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"""Test various scenarios for WeightScheduler.schedule."""
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def test_weight_schedule_network(self):
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self.config(dhcp_agents_per_network=self.max_agents_per_network)
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scheduler = dhcp_agent_scheduler.WeightScheduler()
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# create dhcp agents
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hosts = ['host-%s' % i for i in range(self.agent_count)]
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dhcp_agents = self._create_and_set_agents_down(
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hosts, down_agent_count=self.down_agent_count)
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active_agents = dhcp_agents[self.down_agent_count:]
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unscheduled_active_agents = list(active_agents)
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# schedule some agents before calling schedule
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if self.scheduled_agent_count:
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# schedule the network
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schedule_agents = active_agents[:self.scheduled_agent_count]
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scheduler.resource_filter.bind(self.ctx,
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schedule_agents, self.network_id)
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for agent in schedule_agents:
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unscheduled_active_agents.remove(agent)
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actual_scheduled_agents = scheduler.schedule(self, self.ctx,
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self.network)
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if self.expected_scheduled_agent_count:
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sorted_unscheduled_active_agents = sorted(
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unscheduled_active_agents,
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key=attrgetter('load'))[0:self.expected_scheduled_agent_count]
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self.assertItemsEqual(
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(agent['id'] for agent in actual_scheduled_agents),
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(agent['id'] for agent in sorted_unscheduled_active_agents))
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self.assertEqual(self.expected_scheduled_agent_count,
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len(actual_scheduled_agents))
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hosted_agents = self.list_dhcp_agents_hosting_network(
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self.ctx, self.network_id)
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self.assertEqual(self.scheduled_agent_count +
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len(actual_scheduled_agents),
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len(hosted_agents['agents']))
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else:
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self.assertEqual([], actual_scheduled_agents)
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class TestAutoSchedule(test_dhcp_sch.TestDhcpSchedulerBaseTestCase,
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agentschedulers_db.DhcpAgentSchedulerDbMixin,
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agents_db.AgentDbMixin,
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common_db_mixin.CommonDbMixin):
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"""Test various scenarios for ChanceScheduler.auto_schedule_networks.
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Below is the brief description of the scenario variables
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--------------------------------------------------------
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agent_count
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number of DHCP agents (also number of hosts).
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max_agents_per_network
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Maximum DHCP Agents that can be scheduled for a network.
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network_count
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Number of networks.
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networks_with_dhcp_disabled
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List of networks with dhcp disabled
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hosted_networks
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A mapping of agent id to the ids of the networks that they
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should be initially hosting.
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expected_auto_schedule_return_value
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Expected return value of 'auto_schedule_networks'.
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expected_hosted_networks
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This stores the expected networks that should have been scheduled
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(or that could have already been scheduled) for each agent
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after the 'auto_schedule_networks' function is called.
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no_network_with_az_match
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If this parameter is True, there is no unscheduled network with
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availability_zone_hints matches to an availability_zone of agents
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to be scheduled. The default is False.
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"""
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scenarios = [
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('Agent scheduled to the network if network is not yet hosted',
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dict(agent_count=1,
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max_agents_per_network=1,
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network_count=1,
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networks_with_dhcp_disabled=[],
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hosted_networks={},
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expected_auto_schedule_return_value=True,
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expected_hosted_networks={'agent-0': ['network-0']})),
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('No agent scheduled if no networks are present',
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dict(agent_count=1,
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max_agents_per_network=1,
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network_count=0,
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networks_with_dhcp_disabled=[],
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hosted_networks={},
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expected_auto_schedule_return_value=False,
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expected_hosted_networks={'agent-0': []})),
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('Agents scheduled to the networks if networks are not yet hosted',
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dict(agent_count=2,
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max_agents_per_network=3,
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network_count=2,
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networks_with_dhcp_disabled=[],
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hosted_networks={},
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expected_auto_schedule_return_value=True,
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expected_hosted_networks={'agent-0': ['network-0',
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'network-1'],
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'agent-1': ['network-0',
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'network-1']})),
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('No new agents scheduled if networks are already hosted',
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dict(agent_count=2,
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max_agents_per_network=3,
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network_count=2,
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networks_with_dhcp_disabled=[],
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hosted_networks={'agent-0': ['network-0', 'network-1'],
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'agent-1': ['network-0', 'network-1']},
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expected_auto_schedule_return_value=True,
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expected_hosted_networks={'agent-0': ['network-0',
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'network-1'],
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'agent-1': ['network-0',
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'network-1']})),
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('Additional agents scheduled to the networks if'
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' max_agents_per_network is not yet reached',
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dict(agent_count=4,
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max_agents_per_network=3,
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network_count=4,
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networks_with_dhcp_disabled=[],
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hosted_networks={'agent-0': ['network-0', 'network-1'],
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'agent-1': ['network-0'],
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'agent-2': ['network-2'],
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'agent-3': ['network-0', 'network-2']},
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expected_auto_schedule_return_value=True,
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expected_hosted_networks={'agent-0': ['network-0',
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'network-1',
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'network-2',
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'network-3'],
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'agent-1': ['network-0',
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'network-1',
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'network-2',
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'network-3'],
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'agent-2': ['network-1',
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'network-2',
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'network-3'],
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'agent-3': ['network-0',
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'network-1',
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'network-2',
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'network-3']})),
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('No agents scheduled if networks already hosted and'
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' max_agents_per_network reached',
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dict(agent_count=4,
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max_agents_per_network=1,
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network_count=4,
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networks_with_dhcp_disabled=[],
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hosted_networks={'agent-0': ['network-0'],
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'agent-1': ['network-2'],
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'agent-2': ['network-1'],
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'agent-3': ['network-3']},
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expected_auto_schedule_return_value=True,
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expected_hosted_networks={'agent-0': ['network-0'],
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'agent-1': ['network-2'],
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'agent-2': ['network-1'],
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'agent-3': ['network-3']})),
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('No agents scheduled to the network with dhcp disabled',
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dict(agent_count=2,
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max_agents_per_network=3,
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network_count=2,
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networks_with_dhcp_disabled=['network-1'],
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hosted_networks={},
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expected_auto_schedule_return_value=True,
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expected_hosted_networks={'agent-0': ['network-0'],
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'agent-1': ['network-0']})),
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('No agents scheduled if all networks have dhcp disabled',
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dict(agent_count=2,
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max_agents_per_network=3,
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network_count=2,
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networks_with_dhcp_disabled=['network-0', 'network-1'],
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hosted_networks={},
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expected_auto_schedule_return_value=False,
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expected_hosted_networks={'agent-0': [],
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'agent-1': []})),
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('No agents scheduled if unscheduled network does not match AZ',
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dict(agent_count=1,
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max_agents_per_network=1,
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network_count=1,
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networks_with_dhcp_disabled=[],
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hosted_networks={},
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expected_auto_schedule_return_value=True,
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expected_hosted_networks={'agent-0': []},
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no_network_with_az_match=True)),
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]
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def _strip_host_index(self, name):
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"""Strips the host index.
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Eg. if name = '2-agent-3', then 'agent-3' is returned.
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"""
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return name[name.find('-') + 1:]
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def _extract_index(self, name):
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"""Extracts the index number and returns.
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Eg. if name = '2-agent-3', then 3 is returned
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"""
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return int(name.split('-')[-1])
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def get_subnets(self, context, fields=None):
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subnets = []
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for net in self._networks:
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enable_dhcp = (self._strip_host_index(net['name']) not in
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self.networks_with_dhcp_disabled)
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subnets.append({'network_id': net.id,
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'enable_dhcp': enable_dhcp,
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'segment_id': None})
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return subnets
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def get_network(self, context, net_id):
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az_hints = []
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if getattr(self, 'no_network_with_az_match', False):
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az_hints = ['not-match']
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return {'availability_zone_hints': az_hints}
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def _get_hosted_networks_on_dhcp_agent(self, agent_id):
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binding_objs = network.NetworkDhcpAgentBinding.get_objects(
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self.ctx, dhcp_agent_id=agent_id)
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return [item.network_id for item in binding_objs]
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def _test_auto_schedule(self, host_index):
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self.config(dhcp_agents_per_network=self.max_agents_per_network)
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scheduler = dhcp_agent_scheduler.ChanceScheduler()
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self.ctx = context.get_admin_context()
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msg = 'host_index = %s' % host_index
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# create dhcp agents
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hosts = ['%s-agent-%s' % (host_index, i)
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for i in range(self.agent_count)]
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dhcp_agents = self._create_and_set_agents_down(hosts)
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# create networks
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self._networks = [
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network.Network(
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self.ctx,
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id=uuidutils.generate_uuid(),
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name='%s-network-%s' % (host_index, i))
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for i in range(self.network_count)
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]
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for i in range(len(self._networks)):
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self._networks[i].create()
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network_ids = [net.id for net in self._networks]
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# pre schedule the networks to the agents defined in
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# self.hosted_networks before calling auto_schedule_network
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for agent, networks in self.hosted_networks.items():
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agent_index = self._extract_index(agent)
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for net in networks:
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net_index = self._extract_index(net)
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scheduler.resource_filter.bind(self.ctx,
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[dhcp_agents[agent_index]],
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network_ids[net_index])
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retval = scheduler.auto_schedule_networks(self, self.ctx,
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hosts[host_index])
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self.assertEqual(self.expected_auto_schedule_return_value, retval,
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message=msg)
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agent_id = dhcp_agents[host_index].id
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hosted_networks = self._get_hosted_networks_on_dhcp_agent(agent_id)
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hosted_net_names = [
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self._strip_host_index(net['name'])
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for net in network.Network.get_objects(
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self.ctx, id=hosted_networks)
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]
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expected_hosted_networks = self.expected_hosted_networks['agent-%s' %
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host_index]
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self.assertItemsEqual(hosted_net_names, expected_hosted_networks, msg)
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def test_auto_schedule(self):
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for i in range(self.agent_count):
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self._test_auto_schedule(i)
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class TestAZAwareWeightScheduler(test_dhcp_sch.TestDhcpSchedulerBaseTestCase,
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agentschedulers_db.DhcpAgentSchedulerDbMixin,
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agents_db.AgentDbMixin,
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common_db_mixin.CommonDbMixin):
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"""Test various scenarios for AZAwareWeightScheduler.schedule.
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az_count
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Number of AZs.
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network_az_hints
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Number of AZs in availability_zone_hints of the network.
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agent_count[each az]
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Number of dhcp agents (also number of hosts).
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max_agents_per_network
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Maximum DHCP Agents that can be scheduled for a network.
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scheduled_agent_count[each az]
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Number of agents the network has previously scheduled
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down_agent_count[each az]
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Number of dhcp agents which are down
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expected_scheduled_agent_count[each az]
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Number of scheduled agents the schedule() should return
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or 'None' if the schedule() cannot schedule the network.
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"""
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scenarios = [
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('Single hint, Single agent, Scheduled an agent of the specified AZ',
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dict(az_count=2,
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network_az_hints=1,
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agent_count=[1, 1],
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max_agents_per_network=1,
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scheduled_agent_count=[0, 0],
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down_agent_count=[0, 0],
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expected_scheduled_agent_count=[1, 0])),
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('Multi hints, Multi agents Scheduled agents of the specified AZs',
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dict(az_count=3,
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network_az_hints=2,
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agent_count=[1, 1, 1],
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max_agents_per_network=2,
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scheduled_agent_count=[0, 0, 0],
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down_agent_count=[0, 0, 0],
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expected_scheduled_agent_count=[1, 1, 0])),
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('Single hint, Multi agents, Scheduled agents of the specified AZ',
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dict(az_count=2,
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network_az_hints=1,
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agent_count=[2, 1],
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max_agents_per_network=2,
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scheduled_agent_count=[0, 0],
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down_agent_count=[0, 0],
|
|
expected_scheduled_agent_count=[2, 0])),
|
|
|
|
('Multi hints, Multi agents, Only single AZ available',
|
|
dict(az_count=2,
|
|
network_az_hints=2,
|
|
agent_count=[2, 1],
|
|
max_agents_per_network=2,
|
|
scheduled_agent_count=[0, 0],
|
|
down_agent_count=[0, 1],
|
|
expected_scheduled_agent_count=[2, 0])),
|
|
|
|
('Multi hints, Multi agents, Not enough agents',
|
|
dict(az_count=3,
|
|
network_az_hints=3,
|
|
agent_count=[1, 1, 1],
|
|
max_agents_per_network=3,
|
|
scheduled_agent_count=[0, 0, 0],
|
|
down_agent_count=[0, 1, 0],
|
|
expected_scheduled_agent_count=[1, 0, 1])),
|
|
|
|
('Multi hints, Multi agents, Partially scheduled, Another AZ selected',
|
|
dict(az_count=3,
|
|
network_az_hints=2,
|
|
agent_count=[1, 1, 1],
|
|
max_agents_per_network=2,
|
|
scheduled_agent_count=[1, 0, 0],
|
|
down_agent_count=[0, 0, 0],
|
|
expected_scheduled_agent_count=[0, 1, 0])),
|
|
|
|
('No hint, Scheduled independent to AZ',
|
|
dict(az_count=3,
|
|
network_az_hints=0,
|
|
agent_count=[1, 1, 1],
|
|
max_agents_per_network=3,
|
|
scheduled_agent_count=[0, 0, 0],
|
|
down_agent_count=[0, 0, 0],
|
|
expected_scheduled_agent_count=[1, 1, 1])),
|
|
]
|
|
|
|
def _set_network_az_hints(self):
|
|
self.network['availability_zone_hints'] = []
|
|
for i in range(self.network_az_hints):
|
|
self.network['availability_zone_hints'].append('az%s' % i)
|
|
|
|
def test_schedule_network(self):
|
|
self.config(dhcp_agents_per_network=self.max_agents_per_network)
|
|
scheduler = dhcp_agent_scheduler.AZAwareWeightScheduler()
|
|
self._set_network_az_hints()
|
|
|
|
# create dhcp agents
|
|
for i in range(self.az_count):
|
|
az = 'az%s' % i
|
|
hosts = ['%s-host-%s' % (az, j)
|
|
for j in range(self.agent_count[i])]
|
|
dhcp_agents = self._create_and_set_agents_down(
|
|
hosts, down_agent_count=self.down_agent_count[i], az=az)
|
|
|
|
active_agents = dhcp_agents[self.down_agent_count[i]:]
|
|
|
|
# schedule some agents before calling schedule
|
|
if self.scheduled_agent_count[i]:
|
|
# schedule the network
|
|
schedule_agents = active_agents[:self.scheduled_agent_count[i]]
|
|
scheduler.resource_filter.bind(
|
|
self.ctx, schedule_agents, self.network_id)
|
|
|
|
actual_scheduled_agents = scheduler.schedule(self, self.ctx,
|
|
self.network)
|
|
scheduled_azs = collections.defaultdict(int)
|
|
for agent in actual_scheduled_agents:
|
|
scheduled_azs[agent['availability_zone']] += 1
|
|
|
|
hosted_agents = self.list_dhcp_agents_hosting_network(
|
|
self.ctx, self.network_id)
|
|
hosted_azs = collections.defaultdict(int)
|
|
for agent in hosted_agents['agents']:
|
|
hosted_azs[agent['availability_zone']] += 1
|
|
|
|
for i in range(self.az_count):
|
|
self.assertEqual(self.expected_scheduled_agent_count[i],
|
|
scheduled_azs.get('az%s' % i, 0))
|
|
self.assertEqual(self.scheduled_agent_count[i] +
|
|
scheduled_azs.get('az%s' % i, 0),
|
|
hosted_azs.get('az%s' % i, 0))
|
|
|
|
|
|
class TestDHCPSchedulerWithNetworkAccessibility(
|
|
test_plugin.Ml2PluginV2TestCase):
|
|
|
|
_mechanism_drivers = ['openvswitch']
|
|
|
|
def test_dhcp_scheduler_filters_hosts_without_network_access(self):
|
|
dhcp_agent1 = helpers.register_dhcp_agent(host='host1')
|
|
dhcp_agent2 = helpers.register_dhcp_agent(host='host2')
|
|
dhcp_agent3 = helpers.register_dhcp_agent(host='host3')
|
|
dhcp_agents = [dhcp_agent1, dhcp_agent2, dhcp_agent3]
|
|
helpers.register_ovs_agent(
|
|
host='host1', bridge_mappings={'physnet1': 'br-eth-1'})
|
|
helpers.register_ovs_agent(
|
|
host='host2', bridge_mappings={'physnet2': 'br-eth-1'})
|
|
helpers.register_ovs_agent(
|
|
host='host3', bridge_mappings={'physnet2': 'br-eth-1'})
|
|
admin_context = context.get_admin_context()
|
|
net = self.driver.create_network(
|
|
admin_context,
|
|
{'network': {'name': 'net1',
|
|
providernet.NETWORK_TYPE: 'vlan',
|
|
providernet.PHYSICAL_NETWORK: 'physnet1',
|
|
providernet.SEGMENTATION_ID: 1,
|
|
'tenant_id': 'tenant_one',
|
|
'admin_state_up': True,
|
|
'shared': True}})
|
|
|
|
self.driver.create_subnet(
|
|
admin_context,
|
|
{'subnet':
|
|
{'name': 'name',
|
|
'ip_version': 4,
|
|
'network_id': net['id'],
|
|
'cidr': '10.0.0.0/24',
|
|
'gateway_ip': constants.ATTR_NOT_SPECIFIED,
|
|
'allocation_pools': constants.ATTR_NOT_SPECIFIED,
|
|
'dns_nameservers': constants.ATTR_NOT_SPECIFIED,
|
|
'host_routes': constants.ATTR_NOT_SPECIFIED,
|
|
'tenant_id': 'tenant_one',
|
|
'enable_dhcp': True}})
|
|
|
|
self.plugin.schedule_network(admin_context, net)
|
|
dhcp_agents = self.driver.get_dhcp_agents_hosting_networks(
|
|
admin_context, [net['id']])
|
|
self.assertEqual(1, len(dhcp_agents))
|
|
self.assertEqual('host1', dhcp_agents[0]['host'])
|