b428b6cf15
It has been superseded by HaclusterScaleBackAndForthTest and was used in the following charm gates: hacluster and mysql-router.
197 lines
8.0 KiB
Python
197 lines
8.0 KiB
Python
#!/usr/bin/env python3
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# Copyright 2019 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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"""HACluster testing."""
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import logging
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import os
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import zaza.openstack.charm_tests.test_utils as test_utils
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import zaza.openstack.configure.hacluster
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import zaza.utilities.juju as juju_utils
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class HaclusterBaseTest(test_utils.OpenStackBaseTest):
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"""Base class for hacluster tests."""
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@classmethod
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def setUpClass(cls):
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"""Run class setup for running hacluster tests."""
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super(HaclusterBaseTest, cls).setUpClass()
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cls.vip = os.environ.get("TEST_VIP00")
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class HaclusterTest(HaclusterBaseTest):
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"""hacluster tests."""
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def test_900_action_cleanup(self):
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"""The services can be cleaned up."""
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zaza.model.run_action_on_leader(
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self.application_name,
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'cleanup',
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raise_on_failure=True)
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def test_910_pause_and_resume(self):
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"""The services can be paused and resumed."""
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with self.pause_resume([]):
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logging.info("Testing pause resume")
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def _toggle_maintenance_and_wait(self, expected):
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"""Configure cluster maintenance-mode.
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:param expected: expected value to set maintenance-mode
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"""
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config = {"maintenance-mode": expected}
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logging.info("Setting config to {}".format(config))
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zaza.model.set_application_config(self.application_name, config)
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if expected == 'true':
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_states = {"hacluster": {
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"workload-status": "maintenance",
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"workload-status-message": "Pacemaker in maintenance mode"}}
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else:
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_states = {"hacluster": {
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"workload-status": "active",
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"workload-status-message": "Unit is ready and clustered"}}
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zaza.model.wait_for_application_states(states=_states)
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logging.debug('OK')
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def test_920_put_in_maintenance(self):
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"""Put pacemaker in maintenance mode."""
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logging.debug('Setting cluster in maintenance mode')
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self._toggle_maintenance_and_wait('true')
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self._toggle_maintenance_and_wait('false')
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class HaclusterScaleBackAndForthTest(HaclusterBaseTest):
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"""hacluster tests scaling back and forth."""
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@classmethod
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def setUpClass(cls):
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"""Run class setup for running hacluster tests."""
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super(HaclusterScaleBackAndForthTest, cls).setUpClass()
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test_config = cls.test_config['tests_options']['hacluster']
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cls._principle_app_name = test_config['principle-app-name']
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cls._hacluster_charm_name = test_config['hacluster-charm-name']
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def test_930_scaleback(self):
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"""Remove one unit, recalculate quorum and re-add one unit.
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NOTE(lourot): before lp:1400481 was fixed, the corosync ring wasn't
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recalculated when removing units. So within a cluster of 3 units,
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removing a unit and re-adding one led to a situation where corosync
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considers having 3 nodes online out of 4, instead of just 3 out of 3.
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This test covers this scenario.
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"""
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principle_units = sorted(zaza.model.get_status().applications[
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self._principle_app_name]['units'].keys())
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self.assertEqual(len(principle_units), 3)
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surviving_principle_unit = principle_units[0]
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doomed_principle_unit = principle_units[1]
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surviving_hacluster_unit = juju_utils.get_subordinate_units(
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[surviving_principle_unit],
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charm_name=self._hacluster_charm_name)[0]
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doomed_hacluster_unit = juju_utils.get_subordinate_units(
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[doomed_principle_unit],
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charm_name=self._hacluster_charm_name)[0]
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logging.info('Pausing unit {}'.format(doomed_hacluster_unit))
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zaza.model.run_action(
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doomed_hacluster_unit,
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'pause',
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raise_on_failure=True)
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logging.info('Removing {}'.format(doomed_principle_unit))
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zaza.model.destroy_unit(
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self._principle_app_name,
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doomed_principle_unit,
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wait_disappear=True)
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logging.info('Waiting for model to settle')
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zaza.model.block_until_unit_wl_status(surviving_hacluster_unit,
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'blocked')
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# NOTE(lourot): the surviving principle units (usually keystone units)
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# aren't guaranteed to be blocked, so we don't validate that here.
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zaza.model.block_until_all_units_idle()
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# At this point the corosync ring hasn't been updated yet, so it should
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# still remember the deleted unit:
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self.__assert_some_corosync_nodes_are_offline(surviving_hacluster_unit)
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logging.info('Updating corosync ring')
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hacluster_app_name = zaza.model.get_unit_from_name(
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surviving_hacluster_unit).application
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zaza.model.run_action_on_leader(
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hacluster_app_name,
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'update-ring',
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action_params={'i-really-mean-it': True},
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raise_on_failure=True)
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# At this point if the corosync ring has been properly updated, there
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# shouldn't be any trace of the deleted unit anymore:
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self.__assert_all_corosync_nodes_are_online(surviving_hacluster_unit)
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logging.info('Re-adding an hacluster unit')
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zaza.model.add_unit(self._principle_app_name, wait_appear=True)
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logging.info('Waiting for model to settle')
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# NOTE(lourot): the principle charm may remain blocked here. This seems
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# to happen often when it is keystone and has a mysql-router as other
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# subordinate charm. The keystone units seems to often remain blocked
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# with 'Database not initialised'. This is not the hacluster charm's
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# fault and this is why we don't validate here that the entire model
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# goes back to active/idle.
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zaza.model.block_until_unit_wl_status(surviving_hacluster_unit,
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'active')
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zaza.model.block_until_all_units_idle()
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# Because of lp:1874719 the corosync ring may show a mysterious offline
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# 'node1' node. We clean up the ring by re-running the 'update-ring'
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# action:
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logging.info('Updating corosync ring - workaround for lp:1874719')
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zaza.model.run_action_on_leader(
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hacluster_app_name,
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'update-ring',
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action_params={'i-really-mean-it': True},
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raise_on_failure=True)
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# At this point the corosync ring should not contain any offline node:
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self.__assert_all_corosync_nodes_are_online(surviving_hacluster_unit)
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def __assert_some_corosync_nodes_are_offline(self, hacluster_unit):
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logging.info('Checking that corosync considers at least one node to '
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'be offline')
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output = self._get_crm_status(hacluster_unit)
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self.assertIn('OFFLINE', output,
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"corosync should list at least one offline node")
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def __assert_all_corosync_nodes_are_online(self, hacluster_unit):
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logging.info('Checking that corosync considers all nodes to be online')
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output = self._get_crm_status(hacluster_unit)
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self.assertNotIn('OFFLINE', output,
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"corosync shouldn't list any offline node")
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@staticmethod
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def _get_crm_status(hacluster_unit):
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cmd = 'sudo crm status'
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result = zaza.model.run_on_unit(hacluster_unit, cmd)
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code = result.get('Code')
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if code != '0':
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raise zaza.model.CommandRunFailed(cmd, result)
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output = result.get('Stdout').strip()
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logging.debug('crm output received: {}'.format(output))
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return output
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