00ca87fec3
When clouds have a large number of hosts, the default size of the ARP cache is too small. The cache can overflow, which means that the system has no way to reach some ip addresses. Setting the threshold limits higher addresses the situation, in a reasonably safe way (the maximum impact is 5MB or so of additional RAM used). Docs on ARP at http://man7.org/linux/man-pages/man7/arp.7.html, and more discussion of the issue in the bug. Change-Id: I329ec51eff85a2a99a929c67ff0c68b3b36d7273 Closes-Bug: 1780348
254 lines
9.5 KiB
Python
254 lines
9.5 KiB
Python
# Copyright 2016 Canonical Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from mock import MagicMock, patch, mock_open
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from test_utils import CharmTestCase
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with patch('charmhelpers.core.hookenv.config') as config:
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config.return_value = 'neutron'
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import neutron_ovs_utils as utils
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_reg = utils.register_configs
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_map = utils.restart_map
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utils.register_configs = MagicMock()
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utils.restart_map = MagicMock()
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import neutron_ovs_hooks as hooks
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utils.register_configs = _reg
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utils.restart_map = _map
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TO_PATCH = [
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'create_sysctl',
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'config',
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'CONFIGS',
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'get_shared_secret',
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'log',
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'relation_ids',
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'relation_set',
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'configure_ovs',
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'configure_sriov',
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'use_dvr',
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'use_l3ha',
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'install_packages',
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'install_l3ha_packages',
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'purge_packages',
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'enable_nova_metadata',
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'enable_local_dhcp',
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'install_tmpfilesd',
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'purge_packages',
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'determine_purge_packages',
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]
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NEUTRON_CONF_DIR = "/etc/neutron"
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NEUTRON_CONF = '%s/neutron.conf' % NEUTRON_CONF_DIR
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class NeutronOVSHooksTests(CharmTestCase):
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def setUp(self):
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super(NeutronOVSHooksTests, self).setUp(hooks, TO_PATCH)
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self.config.side_effect = self.test_config.get
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hooks.hooks._config_save = False
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def _call_hook(self, hookname):
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hooks.hooks.execute([
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'hooks/{}'.format(hookname)])
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def test_install_hook(self):
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self._call_hook('install')
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self.install_packages.assert_called_with()
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@patch.object(hooks, 'restart_map')
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@patch.object(hooks, 'restart_on_change')
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def test_migrate_ovs_default_file(self, mock_restart, mock_restart_map):
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# Tests that the /etc/default/openvswitch-switch file is/isn't
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# migrated on the upgrade-charm hook and that no restarts are
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# attempted of the openvswitch-switch service.
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tests = [
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('package-provided-openvswitch-switch', True),
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('16.07-dpdk-openvswitch-switch', True),
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('16.10-openvswitch-switch', False),
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]
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for sample, should_migrate in tests:
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self.CONFIGS.write.reset_mock()
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with open('unit_tests/%s' % sample, 'r') as f:
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content = f.read()
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for ovs_default_exists in [False, True]:
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if ovs_default_exists:
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mock_restart_map.return_value = {utils.OVS_DEFAULT: {}}
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else:
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mock_restart_map.return_value = {}
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with patch('builtins.open', mock_open(read_data=content),
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create=True):
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self.CONFIGS.write.reset_mock()
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self._call_hook('upgrade-charm')
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if should_migrate and ovs_default_exists:
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self.CONFIGS.write.assert_called_with(
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utils.OVS_DEFAULT)
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else:
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self.CONFIGS.write.assert_not_called()
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self.assertEqual(0, mock_restart.call_count)
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def test_config_changed_dvr(self):
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self._call_hook('config-changed')
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self.install_packages.assert_called_with()
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self.assertTrue(self.CONFIGS.write_all.called)
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self.configure_ovs.assert_called_with()
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def test_config_changed_sysctl_overrides(self):
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self.test_config.set(
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'sysctl',
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'{foo : bar}'
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)
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self._call_hook('config-changed')
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self.create_sysctl.assert_called_with(
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'{foo : bar}',
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'/etc/sysctl.d/50-openvswitch.conf')
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@patch.object(hooks, 'neutron_plugin_joined')
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def test_config_changed_rocky_upgrade(self, _plugin_joined):
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self.determine_purge_packages.return_value = ['python-neutron']
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self.relation_ids.return_value = ['neutron-plugin:42']
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self._call_hook('config-changed')
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self.install_packages.assert_called_with()
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self.assertTrue(self.CONFIGS.write_all.called)
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self.configure_ovs.assert_called_with()
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self.purge_packages.assert_called_with(['python-neutron'])
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_plugin_joined.assert_called_with(
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relation_id='neutron-plugin:42',
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request_restart=True)
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@patch.object(hooks, 'os_release')
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@patch.object(hooks, 'neutron_plugin_joined')
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def test_neutron_plugin_api(self, _plugin_joined, _os_release):
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_os_release.return_value = 'newton'
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self.use_dvr.return_value = True
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self.use_l3ha.return_value = False
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self.relation_ids.return_value = ['rid']
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self._call_hook('neutron-plugin-api-relation-changed')
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self.configure_ovs.assert_called_with()
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self.assertTrue(self.CONFIGS.write_all.called)
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_plugin_joined.assert_called_with(relation_id='rid')
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self.install_packages.assert_called_with()
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@patch.object(hooks, 'neutron_plugin_joined')
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def test_neutron_plugin_api_nodvr(self, _plugin_joined):
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self.use_dvr.return_value = False
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self.use_l3ha.return_value = False
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self.relation_ids.return_value = ['rid']
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self._call_hook('neutron-plugin-api-relation-changed')
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self.configure_ovs.assert_called_with()
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self.assertTrue(self.CONFIGS.write_all.called)
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_plugin_joined.assert_called_with(relation_id='rid')
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self.purge_packages.assert_called_with(['neutron-l3-agent',
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'keepalived'])
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def test_neutron_plugin_joined_dvr_dhcp(self):
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self.enable_nova_metadata.return_value = True
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self.enable_local_dhcp.return_value = True
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self.use_dvr.return_value = True
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self.get_shared_secret.return_value = 'secret'
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self._call_hook('neutron-plugin-relation-joined')
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rel_data = {
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'metadata-shared-secret': 'secret',
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}
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self.relation_set.assert_called_with(
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relation_id=None,
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**rel_data
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)
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self.assertTrue(self.install_packages.called)
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def test_neutron_plugin_joined_dvr_nodhcp(self):
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self.enable_nova_metadata.return_value = True
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self.enable_local_dhcp.return_value = False
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self.use_dvr.return_value = True
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self.get_shared_secret.return_value = 'secret'
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self._call_hook('neutron-plugin-relation-joined')
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rel_data = {
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'metadata-shared-secret': 'secret',
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}
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self.relation_set.assert_called_with(
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relation_id=None,
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**rel_data
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)
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self.purge_packages.assert_called_with(['neutron-dhcp-agent'])
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self.assertFalse(self.install_packages.called)
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def test_neutron_plugin_joined_nodvr_nodhcp(self):
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self.enable_nova_metadata.return_value = False
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self.enable_local_dhcp.return_value = False
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self.use_dvr.return_value = False
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self.get_shared_secret.return_value = 'secret'
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self._call_hook('neutron-plugin-relation-joined')
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rel_data = {
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'metadata-shared-secret': None,
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}
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self.relation_set.assert_called_with(
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relation_id=None,
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**rel_data
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)
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self.purge_packages.assert_called_with(['neutron-dhcp-agent',
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'neutron-metadata-agent'])
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self.assertFalse(self.install_packages.called)
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@patch.object(hooks, 'os_release')
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@patch.object(hooks, 'neutron_plugin_joined')
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def test_neutron_plugin_api_dvr_no_l3ha(self, _plugin_joined, _os_release):
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_os_release.return_value = 'newton'
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self.use_dvr.return_value = True
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self.use_l3ha.return_value = False
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self.relation_ids.return_value = ['rid']
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self._call_hook('neutron-plugin-api-relation-changed')
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self.configure_ovs.assert_called_with()
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self.assertTrue(self.CONFIGS.write_all.called)
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_plugin_joined.assert_called_with(relation_id='rid')
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self.purge_packages.assert_called_with(['keepalived'])
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@patch.object(hooks, 'os_release')
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@patch.object(hooks, 'neutron_plugin_joined')
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def test_neutron_plugin_api_dvr_l3ha(self, _plugin_joined, _os_release):
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_os_release.return_value = 'newton'
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self.use_dvr.return_value = True
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self.use_l3ha.return_value = True
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self.relation_ids.return_value = ['rid']
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self._call_hook('neutron-plugin-api-relation-changed')
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self.configure_ovs.assert_called_with()
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self.assertTrue(self.CONFIGS.write_all.called)
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_plugin_joined.assert_called_with(relation_id='rid')
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self.install_packages.assert_called_with()
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self.install_l3ha_packages.assert_called_with()
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def test_amqp_joined(self):
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self._call_hook('amqp-relation-joined')
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self.relation_set.assert_called_with(
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username='neutron',
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vhost='openstack',
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relation_id=None
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)
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def test_amqp_changed(self):
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self.CONFIGS.complete_contexts.return_value = ['amqp']
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self._call_hook('amqp-relation-changed')
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self.assertTrue(self.CONFIGS.write.called_with(NEUTRON_CONF))
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def test_amqp_departed(self):
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self._call_hook('amqp-relation-departed')
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self.assertTrue(self.CONFIGS.write.called_with(NEUTRON_CONF))
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