Add faults test which destroys and creates physical bridges

Test is destroying physical bridges on the node where router is
hosted so that floating IP shouldn't work at all.
Then it creates bridges again and checks if neutron-ovs-agent
was able to properly recover from that and FIP will work again.

Unfortunatelly this test can't work in e.g. devstack based u/s jobs
as there is additional bridge br-infra which provides connection between
nodes and this br-infra bridge is connected with br-ex by patch port.
When tobiko deletes br-ex and creates it again, there is this patch port
to br-infra missing and test is failing alwasy.

Test should works fine on deployments based on TripleO.

Change-Id: I125285f5f8abd2b2a285a7e46c954d6180d3ec32
This commit is contained in:
Slawek Kaplonski 2020-09-25 15:49:57 +02:00 committed by Federico Ressi
parent 0c2560f0fa
commit 3247000865
5 changed files with 98 additions and 6 deletions

View File

@ -45,6 +45,7 @@ NoSuchNetwork = _client.NoSuchNetwork
NoSuchPort = _client.NoSuchPort
NoSuchRouter = _client.NoSuchRouter
NoSuchSubnet = _client.NoSuchSubnet
AgentNotFoundOnHost = _agent.AgentNotFoundOnHost
new_ipv4_cidr = _cidr.new_ipv4_cidr
new_ipv6_cidr = _cidr.new_ipv6_cidr

View File

@ -17,6 +17,10 @@ import tobiko
from tobiko.openstack.neutron import _client
class AgentNotFoundOnHost(tobiko.TobikoException):
message = ("Agent {agent_type!s} not found on the host {host!s}")
class NetworkingAgentFixture(tobiko.SharedFixture):
client = None

View File

@ -31,10 +31,6 @@ from tobiko.shell import sh
LOG = log.getLogger(__name__)
class AgentNotFoundOnHost(tobiko.TobikoException):
message = ("Agent {agent_type!s} not found on the host {host!s}")
class AgentTestMixin(object):
def stop_service_on_agents(self, service_name, agents):
@ -350,8 +346,8 @@ class OvsAgentTest(testtools.TestCase, AgentTestMixin):
for agent in self.ovs_agents:
if host_shortname == tobiko.get_short_hostname(agent['host']):
return agent
raise AgentNotFoundOnHost(agent_type="neutron-ovs-agent",
host=host.name)
raise neutron.AgentNotFoundOnHost(agent_type="neutron-ovs-agent",
host=host.name)
def test_vm_reachability_during_stop_ovs_agent(self):
# Check if vm is reachable before test

View File

View File

@ -0,0 +1,91 @@
# Copyright (c) 2020 Red Hat
# All Rights Reserved.
#
# 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.
from __future__ import absolute_import
import collections
import testtools
import tobiko
from tobiko.openstack import neutron
from tobiko.openstack import stacks
from tobiko.openstack import topology
from tobiko.shell import ping
from tobiko.shell import sh
from tobiko.tripleo import undercloud
@neutron.skip_if_missing_networking_agents(binary='neutron-openvswitch-agent')
@neutron.skip_if_missing_networking_agents(binary='neutron-l3-agent')
class OpenvswitchTest(testtools.TestCase):
stack = tobiko.required_setup_fixture(stacks.CirrosServerStackFixture)
def setUp(self):
super(OpenvswitchTest, self).setUp()
self.ovs_agents = neutron.list_agents(agent_type="Open vSwitch agent")
self.router_id = self.stack.network_stack.gateway_id
self.deleted_bridges = collections.defaultdict(set)
def tearDown(self):
super(OpenvswitchTest, self).tearDown()
# Try to create all bridges which were deleted during the tests
self._create_bridges()
def _create_bridges(self):
for host, bridges in self.deleted_bridges.items():
self._create_bridge(host, bridges)
def _create_bridge(self, hostname, bridges):
for br_name in bridges:
agent_host = topology.get_openstack_node(hostname=hostname)
sh.execute(
"sudo ovs-vsctl --may-exist add-br %s" % br_name,
ssh_client=agent_host.ssh_client)
def _delete_bridges(self, hostname, bridges):
for br_name in bridges:
agent_host = topology.get_openstack_node(hostname=hostname)
sh.execute(
"sudo ovs-vsctl del-br %s" % br_name,
ssh_client=agent_host.ssh_client)
self.deleted_bridges[hostname].add(br_name)
def _get_agent_from_host(self, hostname):
host_shortname = tobiko.get_short_hostname(hostname)
for agent in self.ovs_agents:
if host_shortname == tobiko.get_short_hostname(agent['host']):
return agent
raise neutron.AgentNotFoundOnHost(agent_type="neutron-ovs-agent",
host=hostname)
@undercloud.skip_if_missing_undercloud
def test_recreate_physical_bridge(self):
# Check if vm is reachable before test
ping.ping_until_received(self.stack.ip_address).assert_replied()
network_l3_agents = neutron.list_l3_agent_hosting_routers(
self.router_id)
for agent in network_l3_agents:
# Get neutron-ovs-agent bridge mappings
ovs_agent = self._get_agent_from_host(agent['host'])
self._delete_bridges(
agent['host'],
ovs_agent['configurations']['bridge_mappings'].values())
ping.ping_until_unreceived(self.stack.ip_address).assert_not_replied()
self._create_bridges()
ping.ping_until_received(self.stack.ip_address).assert_replied()