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# Copyright DataStax, Inc.
#
# 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 tests.integration import CCM_KWARGS, use_cluster, remove_cluster, MockLoggingHandler
from tests.integration import setup_keyspace
from cassandra.cluster import Cluster
from cassandra import cluster
from collections import namedtuple
from functools import wraps
import logging
from threading import Thread, Event
try:
from ccmlib.node import TimeoutError
except ImportError:
TimeoutError = Exception
import time
import logging
import unittest
def setup_module():
remove_cluster()
UPGRADE_CLUSTER_NAME = "upgrade_cluster"
UpgradePath = namedtuple('UpgradePath', ('name', 'starting_version', 'upgrade_version', 'configuration_options'))
log = logging.getLogger(__name__)
class upgrade_paths(object):
"""
Decorator used to specify the upgrade paths for a particular method
"""
def __init__(self, paths):
self.paths = paths
def __call__(self, method):
@wraps(method)
def wrapper(*args, **kwargs):
for path in self.paths:
self_from_decorated = args[0]
log.debug('setting up {path}'.format(path=path))
self_from_decorated.UPGRADE_PATH = path
self_from_decorated._upgrade_step_setup()
method(*args, **kwargs)
log.debug('tearing down {path}'.format(path=path))
self_from_decorated._upgrade_step_teardown()
return wrapper
class UpgradeBase(unittest.TestCase):
"""
Base class for the upgrade tests. The _setup method
will clean the environment and start the appropriate C* version according
to the upgrade path. The upgrade can be done in a different thread using the
start_upgrade upgrade_method (this would be the most realistic scenario)
or node by node, waiting for the upgrade to happen, using _upgrade_one_node method
"""
UPGRADE_PATH = None
start_cluster = True
set_keyspace = True
@classmethod
def setUpClass(cls):
cls.logger_handler = MockLoggingHandler()
logger = logging.getLogger(cluster.__name__)
logger.addHandler(cls.logger_handler)
def _upgrade_step_setup(self):
"""
This is not the regular _setUp method because it will be called from
the decorator instead of letting nose handle it.
This setup method will start a cluster with the right version according
to the variable UPGRADE_PATH.
"""
remove_cluster()
self.cluster = use_cluster(UPGRADE_CLUSTER_NAME + self.UPGRADE_PATH.name, [3],
ccm_options=self.UPGRADE_PATH.starting_version, set_keyspace=self.set_keyspace,
configuration_options=self.UPGRADE_PATH.configuration_options)
self.nodes = self.cluster.nodelist()
self.last_node_upgraded = None
self.upgrade_done = Event()
self.upgrade_thread = None
if self.start_cluster:
setup_keyspace()
self.cluster_driver = Cluster()
self.session = self.cluster_driver.connect()
self.logger_handler.reset()
def _upgrade_step_teardown(self):
"""
special tearDown method called by the decorator after the method has ended
"""
if self.upgrade_thread:
self.upgrade_thread.join(timeout=5)
self.upgrade_thread = None
if self.start_cluster:
self.cluster_driver.shutdown()
def start_upgrade(self, time_node_upgrade):
"""
Starts the upgrade in a different thread
"""
log.debug('Starting upgrade in new thread')
self.upgrade_thread = Thread(target=self._upgrade, args=(time_node_upgrade,))
self.upgrade_thread.start()
def _upgrade(self, time_node_upgrade):
"""
Starts the upgrade in the same thread
"""
start_time = time.time()
for node in self.nodes:
self.upgrade_node(node)
end_time = time.time()
time_to_upgrade = end_time - start_time
if time_node_upgrade > time_to_upgrade:
time.sleep(time_node_upgrade - time_to_upgrade)
self.upgrade_done.set()
def is_upgraded(self):
"""
Returns True if the upgrade has finished and False otherwise
"""
return self.upgrade_done.is_set()
def wait_for_upgrade(self, timeout=None):
"""
Waits until the upgrade has completed
"""
self.upgrade_done.wait(timeout=timeout)
def upgrade_node(self, node):
"""
Upgrades only one node. Return True if the upgrade
has finished and False otherwise
"""
node.drain()
node.stop(gently=True)
node.set_install_dir(**self.UPGRADE_PATH.upgrade_version)
# There must be a cleaner way of doing this, but it's necessary here
# to call the private method from cluster __update_topology_files
self.cluster._Cluster__update_topology_files()
try:
node.start(wait_for_binary_proto=True, wait_other_notice=True)
except TimeoutError:
self.fail("Error starting C* node while upgrading")
return True
class UpgradeBaseAuth(UpgradeBase):
"""
Base class of authentication test, the authentication parameters for
C* still have to be specified within the upgrade path variable
"""
start_cluster = False
set_keyspace = False
def _upgrade_step_setup(self):
"""
We sleep here for the same reason as we do in test_authentication.py:
there seems to be some race, with some versions of C* taking longer to
get the auth (and default user) setup. Sleep here to give it a chance
"""
super(UpgradeBaseAuth, self)._upgrade_step_setup()
time.sleep(10)
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