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tests.py
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#!/usr/bin/env python3
#
# Copyright 2019 Canonical Ltd
#
# 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.
"""Encapsulate cinder-backup testing."""
import copy
import logging
import tenacity
import zaza.model
import zaza.openstack.charm_tests.test_utils as test_utils
from zaza.openstack.utilities import retry_on_connect_failure
import zaza.openstack.utilities.ceph as ceph_utils
import zaza.openstack.utilities.openstack as openstack_utils
class CinderBackupTest(test_utils.OpenStackBaseTest):
"""Encapsulate Cinder Backup tests."""
RESOURCE_PREFIX = 'zaza-cinderbackuptests'
@classmethod
def setUpClass(cls):
"""Run class setup for running Cinder Backup tests."""
super(CinderBackupTest, cls).setUpClass()
cls.cinder_client = retry_on_connect_failure(
openstack_utils.get_cinder_session_client(cls.keystone_session),
log=logging.warn)
@property
def services(self):
"""Return a list services for the selected OpenStack release."""
current_release = openstack_utils.get_os_release()
services = ['cinder-scheduler', 'cinder-volume']
if (current_release >=
openstack_utils.get_os_release('xenial_ocata')):
services.append('apache2')
else:
services.append('cinder-api')
return services
def test_100_volume_create_extend_delete(self):
"""Test creating, extending a volume."""
vol_new = openstack_utils.create_volume(
self.cinder_client,
name='{}-100-vol'.format(self.RESOURCE_PREFIX),
size=1)
self.cinder_client.volumes.extend(
vol_new.id,
'2')
openstack_utils.resource_reaches_status(
self.cinder_client.volumes,
vol_new.id,
expected_status="available",
msg="Extended volume")
def test_410_cinder_vol_create_backup_delete_restore_pool_inspect(self):
"""Create, backup, delete, restore a ceph-backed cinder volume.
Create, backup, delete, restore a ceph-backed cinder volume, and
inspect ceph cinder pool object count as the volume is created
and deleted.
"""
unit_name = zaza.model.get_lead_unit_name('ceph-mon')
obj_count_samples = []
pool_size_samples = []
pools = ceph_utils.get_ceph_pools(unit_name)
expected_pool = 'cinder-ceph'
cinder_ceph_pool = pools[expected_pool]
# Check ceph cinder pool object count, disk space usage and pool name
logging.info('Checking ceph cinder pool original samples...')
pool_name, obj_count, kb_used = ceph_utils.get_ceph_pool_sample(
unit_name, cinder_ceph_pool)
obj_count_samples.append(obj_count)
pool_size_samples.append(kb_used)
self.assertEqual(pool_name, expected_pool)
for attempt in tenacity.Retrying(
stop=tenacity.stop_after_attempt(3)):
with attempt:
# Create ceph-backed cinder volume
cinder_vol_name = '{}-410-{}-vol'.format(
self.RESOURCE_PREFIX, attempt.retry_state.attempt_number)
cinder_vol = self.cinder_client.volumes.create(
name=cinder_vol_name, size=1)
openstack_utils.resource_reaches_status(
self.cinder_client.volumes,
cinder_vol.id,
wait_iteration_max_time=180,
stop_after_attempt=30,
expected_status='available',
msg='ceph-backed cinder volume')
# Back up the volume
# NOTE(lourot): sometimes, especially on Mitaka, the backup
# remains stuck forever in 'creating' state and the volume in
# 'backing-up' state. See lp:1877076
# Attempting to create another volume and another backup
# usually then succeeds. Release notes and bug trackers show
# that many things have been fixed and are still left to be
# fixed in this area.
# When the backup creation succeeds, it usually does within
# 12 minutes.
vol_backup_name = '{}-410-{}-backup-vol'.format(
self.RESOURCE_PREFIX, attempt.retry_state.attempt_number)
vol_backup = self.cinder_client.backups.create(
cinder_vol.id, name=vol_backup_name)
openstack_utils.resource_reaches_status(
self.cinder_client.backups,
vol_backup.id,
wait_iteration_max_time=180,
stop_after_attempt=30,
expected_status='available',
msg='Backup volume')
# Delete the volume
openstack_utils.delete_volume(self.cinder_client, cinder_vol.id)
# Restore the volume
self.cinder_client.restores.restore(vol_backup.id)
openstack_utils.resource_reaches_status(
self.cinder_client.backups,
vol_backup.id,
wait_iteration_max_time=180,
stop_after_attempt=15,
expected_status='available',
msg='Restored backup volume')
# Delete the backup
openstack_utils.delete_volume_backup(
self.cinder_client,
vol_backup.id)
openstack_utils.resource_removed(
self.cinder_client.backups,
vol_backup.id,
wait_iteration_max_time=180,
stop_after_attempt=15,
msg="Backup volume")
# Re-check ceph cinder pool object count and disk usage
logging.info('Checking ceph cinder pool samples '
'after volume create...')
pool_name, obj_count, kb_used = ceph_utils.get_ceph_pool_sample(
unit_name, cinder_ceph_pool, self.model_name)
obj_count_samples.append(obj_count)
pool_size_samples.append(kb_used)
vols = self.cinder_client.volumes.list()
try:
cinder_vols = [v for v in vols if v.name == cinder_vol_name]
except AttributeError:
cinder_vols = [v for v in vols if
v.display_name == cinder_vol_name]
if not cinder_vols:
# NOTE(hopem): it appears that at some point cinder-backup stopped
# restoring volume metadata properly so revert to default name if
# original is not found
name = "restore_backup_{}".format(vol_backup.id)
try:
cinder_vols = [v for v in vols if v.name == name]
except AttributeError:
cinder_vols = [v for v in vols if v.display_name == name]
self.assertTrue(cinder_vols)
cinder_vol = cinder_vols[0]
# Delete restored cinder volume
openstack_utils.delete_volume(self.cinder_client, cinder_vol.id)
openstack_utils.resource_removed(
self.cinder_client.volumes,
cinder_vol.id,
wait_iteration_max_time=180,
stop_after_attempt=15,
msg="Volume")
@tenacity.retry(wait=tenacity.wait_exponential(multiplier=10, max=300),
reraise=True, stop=tenacity.stop_after_attempt(10),
retry=tenacity.retry_if_exception_type(AssertionError))
def _check_get_ceph_pool_sample(obj_count_samples, pool_size_samples):
pool_name, obj_count, kb_used = ceph_utils.get_ceph_pool_sample(
unit_name, cinder_ceph_pool, self.model_name)
_obj_count_samples = copy.deepcopy(obj_count_samples)
_pool_size_samples = copy.deepcopy(pool_size_samples)
_obj_count_samples.append(obj_count)
_pool_size_samples.append(kb_used)
# Validate ceph cinder pool object count samples over time
original, created, deleted = range(3)
self.assertFalse(_obj_count_samples[created] <=
_obj_count_samples[original])
self.assertFalse(_obj_count_samples[deleted] >=
_obj_count_samples[created])
# Luminous (pike) ceph seems more efficient at disk usage so we
# cannot guarantee the ordering of kb_used
if (openstack_utils.get_os_release() <
openstack_utils.get_os_release('xenial_mitaka')):
self.assertFalse(_pool_size_samples[created] <=
_pool_size_samples[original])
self.assertFalse(_pool_size_samples[deleted] >=
_pool_size_samples[created])
# Final check, ceph cinder pool object count and disk usage
logging.info('Checking ceph cinder pool after volume delete...')
# It sometime takes a short time for removal to be reflected in
# get_ceph_pool_sample so wrap check in tenacity decorator to retry.
_check_get_ceph_pool_sample(obj_count_samples, pool_size_samples)