297 lines
8.7 KiB
Python
297 lines
8.7 KiB
Python
# Copyright 2013-2015 DataStax, Inc.
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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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import time
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import traceback
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try:
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import unittest2 as unittest
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except ImportError:
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import unittest # noqa
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import logging
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log = logging.getLogger(__name__)
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import os
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from threading import Event
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import six
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from subprocess import call
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from itertools import groupby
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from cassandra.cluster import Cluster
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try:
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from ccmlib.cluster import Cluster as CCMCluster
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from ccmlib.cluster_factory import ClusterFactory as CCMClusterFactory
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from ccmlib import common
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except ImportError as e:
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CCMClusterFactory = None
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CLUSTER_NAME = 'test_cluster'
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SINGLE_NODE_CLUSTER_NAME = 'single_node'
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MULTIDC_CLUSTER_NAME = 'multidc_test_cluster'
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CCM_CLUSTER = None
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path = os.path.join(os.path.abspath(os.path.dirname(__file__)), 'ccm')
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if not os.path.exists(path):
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os.mkdir(path)
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cass_version = None
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cql_version = None
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def get_server_versions():
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"""
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Probe system.local table to determine Cassandra and CQL version.
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Returns a tuple of (cassandra_version, cql_version).
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"""
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global cass_version, cql_version
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if cass_version is not None:
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return (cass_version, cql_version)
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c = Cluster(protocol_version=1)
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s = c.connect()
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row = s.execute('SELECT cql_version, release_version FROM system.local')[0]
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cass_version = _tuple_version(row.release_version)
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cql_version = _tuple_version(row.cql_version)
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c.shutdown()
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return (cass_version, cql_version)
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def _tuple_version(version_string):
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if '-' in version_string:
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version_string = version_string[:version_string.index('-')]
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return tuple([int(p) for p in version_string.split('.')])
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USE_CASS_EXTERNAL = bool(os.getenv('USE_CASS_EXTERNAL', False))
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default_cassandra_version = '2.1.3'
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if USE_CASS_EXTERNAL:
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if CCMClusterFactory:
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# see if the external instance is running in ccm
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path = common.get_default_path()
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name = common.current_cluster_name(path)
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CCM_CLUSTER = CCMClusterFactory.load(common.get_default_path(), name)
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CCM_CLUSTER.start(wait_for_binary_proto=True, wait_other_notice=True)
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# Not sure what's going on, but the server version query
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# hangs in python3. This appears to be related to running inside of
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# nosetests, and only for this query that would run while loading the
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# module.
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# This is a hack to make it run with default cassandra version for PY3.
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# Not happy with it, but need to move on for now.
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if not six.PY3:
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cass_ver, _ = get_server_versions()
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default_cassandra_version = '.'.join('%d' % i for i in cass_ver)
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else:
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if not os.getenv('CASSANDRA_VERSION'):
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log.warning("Using default C* version %s because external server cannot be queried" % default_cassandra_version)
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CASSANDRA_DIR = os.getenv('CASSANDRA_DIR', None)
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CASSANDRA_VERSION = os.getenv('CASSANDRA_VERSION', default_cassandra_version)
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CCM_KWARGS = {}
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if CASSANDRA_DIR:
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log.info("Using Cassandra dir: %s", CASSANDRA_DIR)
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CCM_KWARGS['install_dir'] = CASSANDRA_DIR
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else:
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log.info('Using Cassandra version: %s', CASSANDRA_VERSION)
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CCM_KWARGS['version'] = CASSANDRA_VERSION
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if CASSANDRA_VERSION > '2.1':
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default_protocol_version = 3
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elif CASSANDRA_VERSION > '2.0':
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default_protocol_version = 2
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else:
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default_protocol_version = 1
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PROTOCOL_VERSION = int(os.getenv('PROTOCOL_VERSION', default_protocol_version))
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def get_cluster():
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return CCM_CLUSTER
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def get_node(node_id):
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return CCM_CLUSTER.nodes['node%s' % node_id]
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def use_multidc(dc_list):
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use_cluster(MULTIDC_CLUSTER_NAME, dc_list, start=True)
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def use_singledc(start=True):
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use_cluster(CLUSTER_NAME, [3], start=start)
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def use_single_node(start=True):
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use_cluster(SINGLE_NODE_CLUSTER_NAME, [1], start=start)
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def remove_cluster():
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if USE_CASS_EXTERNAL:
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return
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global CCM_CLUSTER
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if CCM_CLUSTER:
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log.debug("removing cluster %s", CCM_CLUSTER.name)
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CCM_CLUSTER.remove()
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CCM_CLUSTER = None
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def is_current_cluster(cluster_name, node_counts):
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global CCM_CLUSTER
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if CCM_CLUSTER and CCM_CLUSTER.name == cluster_name:
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if [len(list(nodes)) for dc, nodes in
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groupby(CCM_CLUSTER.nodelist(), lambda n: n.data_center)] == node_counts:
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return True
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return False
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def use_cluster(cluster_name, nodes, ipformat=None, start=True):
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global CCM_CLUSTER
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if USE_CASS_EXTERNAL:
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if CCM_CLUSTER:
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log.debug("Using external ccm cluster %s", CCM_CLUSTER.name)
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else:
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log.debug("Using unnamed external cluster")
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return
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if is_current_cluster(cluster_name, nodes):
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log.debug("Using existing cluster %s", cluster_name)
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return
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if CCM_CLUSTER:
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log.debug("Stopping cluster %s", CCM_CLUSTER.name)
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CCM_CLUSTER.stop()
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try:
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try:
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cluster = CCMClusterFactory.load(path, cluster_name)
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log.debug("Found existing ccm %s cluster; clearing", cluster_name)
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cluster.clear()
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cluster.set_install_dir(**CCM_KWARGS)
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except Exception:
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log.debug("Creating new ccm %s cluster with %s", cluster_name, CCM_KWARGS)
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cluster = CCMCluster(path, cluster_name, **CCM_KWARGS)
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cluster.set_configuration_options({'start_native_transport': True})
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common.switch_cluster(path, cluster_name)
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cluster.populate(nodes, ipformat=ipformat)
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if start:
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log.debug("Starting ccm %s cluster", cluster_name)
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cluster.start(wait_for_binary_proto=True, wait_other_notice=True)
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setup_test_keyspace(ipformat=ipformat)
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CCM_CLUSTER = cluster
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except Exception:
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log.exception("Failed to start ccm cluster. Removing cluster.")
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remove_cluster()
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call(["pkill", "-9", "-f", ".ccm"])
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raise
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def teardown_package():
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if USE_CASS_EXTERNAL:
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return
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# when multiple modules are run explicitly, this runs between them
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# need to make sure CCM_CLUSTER is properly cleared for that case
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remove_cluster()
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for cluster_name in [CLUSTER_NAME, MULTIDC_CLUSTER_NAME]:
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try:
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cluster = CCMClusterFactory.load(path, cluster_name)
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try:
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cluster.remove()
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log.info('Removed cluster: %s' % cluster_name)
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except Exception:
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log.exception('Failed to remove cluster: %s' % cluster_name)
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except Exception:
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log.warn('Did not find cluster: %s' % cluster_name)
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def setup_test_keyspace(ipformat=None):
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# wait for nodes to startup
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time.sleep(10)
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if not ipformat:
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cluster = Cluster(protocol_version=PROTOCOL_VERSION)
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else:
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cluster = Cluster(contact_points=["::1"], protocol_version=PROTOCOL_VERSION)
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session = cluster.connect()
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try:
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results = session.execute("SELECT keyspace_name FROM system.schema_keyspaces")
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existing_keyspaces = [row[0] for row in results]
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for ksname in ('test1rf', 'test2rf', 'test3rf'):
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if ksname in existing_keyspaces:
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session.execute("DROP KEYSPACE %s" % ksname)
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ddl = '''
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CREATE KEYSPACE test3rf
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WITH replication = {'class': 'SimpleStrategy', 'replication_factor': '3'}'''
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session.execute(ddl)
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ddl = '''
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CREATE KEYSPACE test2rf
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WITH replication = {'class': 'SimpleStrategy', 'replication_factor': '2'}'''
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session.execute(ddl)
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ddl = '''
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CREATE KEYSPACE test1rf
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WITH replication = {'class': 'SimpleStrategy', 'replication_factor': '1'}'''
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session.execute(ddl)
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ddl = '''
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CREATE TABLE test3rf.test (
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k int PRIMARY KEY,
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v int )'''
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session.execute(ddl)
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except Exception:
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traceback.print_exc()
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raise
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finally:
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cluster.shutdown()
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class UpDownWaiter(object):
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def __init__(self, host):
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self.down_event = Event()
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self.up_event = Event()
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host.monitor.register(self)
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def on_up(self, host):
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self.up_event.set()
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def on_down(self, host):
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self.down_event.set()
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def wait_for_down(self):
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self.down_event.wait()
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def wait_for_up(self):
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self.up_event.wait()
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