forked from thepaul/cassandra-dtest
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snapshot_test.py
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snapshot_test.py
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import distutils.dir_util
import glob
import os
import shutil
import subprocess
import time
from cassandra.concurrent import execute_concurrent_with_args
from dtest import Tester, debug
from tools import safe_mkdtemp, replace_in_file, since
class SnapshotTester(Tester):
def __init__(self, *args, **kwargs):
Tester.__init__(self, *args, **kwargs)
def insert_rows(self, session, start, end):
insert_statement = session.prepare("INSERT INTO ks.cf (key, val) VALUES (?, 'asdf')")
args = [(r,) for r in range(start, end)]
execute_concurrent_with_args(session, insert_statement, args, concurrency=20)
def make_snapshot(self, node, ks, cf, name):
debug("Making snapshot....")
node.flush()
snapshot_cmd = 'snapshot {ks} -cf {cf} -t {name}'.format(**locals())
debug("Running snapshot cmd: {snapshot_cmd}".format(snapshot_cmd=snapshot_cmd))
node.nodetool(snapshot_cmd)
tmpdir = safe_mkdtemp()
os.mkdir(os.path.join(tmpdir, ks))
os.mkdir(os.path.join(tmpdir, ks, cf))
node_dir = node.get_path()
# Find the snapshot dir, it's different in various C* versions:
snapshot_dir = "{node_dir}/data/{ks}/{cf}/snapshots/{name}".format(**locals())
if not os.path.isdir(snapshot_dir):
snapshot_dir = glob.glob("{node_dir}/data/{ks}/{cf}-*/snapshots/{name}".format(**locals()))[0]
debug("snapshot_dir is : " + snapshot_dir)
debug("snapshot copy is : " + tmpdir)
# Copy files from the snapshot dir to existing temp dir
distutils.dir_util.copy_tree(str(snapshot_dir), os.path.join(tmpdir, ks, cf))
return tmpdir
def restore_snapshot(self, snapshot_dir, node, ks, cf):
debug("Restoring snapshot....")
snapshot_dir = os.path.join(snapshot_dir, ks, cf)
ip = node.address()
args = [node.get_tool('sstableloader'), '-d', ip, snapshot_dir]
p = subprocess.Popen(args, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
stdout, stderr = p.communicate()
exit_status = p.wait()
if exit_status != 0:
raise Exception("sstableloader command '%s' failed; exit status: %d'; stdout: %s; stderr: %s" %
(" ".join(args), exit_status, stdout, stderr))
class TestSnapshot(SnapshotTester):
def __init__(self, *args, **kwargs):
SnapshotTester.__init__(self, *args, **kwargs)
def test_basic_snapshot_and_restore(self):
cluster = self.cluster
cluster.populate(1).start()
(node1,) = cluster.nodelist()
session = self.patient_cql_connection(node1)
self.create_ks(session, 'ks', 1)
session.execute('CREATE TABLE ks.cf ( key int PRIMARY KEY, val text);')
self.insert_rows(session, 0, 100)
snapshot_dir = self.make_snapshot(node1, 'ks', 'cf', 'basic')
# Write more data after the snapshot, this will get thrown
# away when we restore:
self.insert_rows(session, 100, 200)
rows = session.execute('SELECT count(*) from ks.cf')
self.assertEqual(rows[0][0], 200)
# Drop the keyspace, make sure we have no data:
session.execute('DROP KEYSPACE ks')
self.create_ks(session, 'ks', 1)
session.execute('CREATE TABLE ks.cf ( key int PRIMARY KEY, val text);')
rows = session.execute('SELECT count(*) from ks.cf')
self.assertEqual(rows[0][0], 0)
# Restore data from snapshot:
self.restore_snapshot(snapshot_dir, node1, 'ks', 'cf')
node1.nodetool('refresh ks cf')
rows = session.execute('SELECT count(*) from ks.cf')
# clean up
debug("removing snapshot_dir: " + snapshot_dir)
shutil.rmtree(snapshot_dir)
self.assertEqual(rows[0][0], 100)
class TestArchiveCommitlog(SnapshotTester):
def __init__(self, *args, **kwargs):
kwargs['cluster_options'] = {'commitlog_segment_size_in_mb': 1}
SnapshotTester.__init__(self, *args, **kwargs)
def make_snapshot(self, node, ks, cf, name):
debug("Making snapshot....")
node.flush()
snapshot_cmd = 'snapshot {ks} -cf {cf} -t {name}'.format(**locals())
debug("Running snapshot cmd: {snapshot_cmd}".format(snapshot_cmd=snapshot_cmd))
node.nodetool(snapshot_cmd)
tmpdir = safe_mkdtemp()
node_dir = node.get_path()
# Copy files from the snapshot dir to existing temp dir
distutils.dir_util.copy_tree(os.path.join(node.get_path(), 'data', ks), tmpdir)
return tmpdir
def restore_snapshot(self, snapshot_dir, node, ks, cf, name):
debug("Restoring snapshot for cf ....")
data_dir = os.path.join(node.get_path(), 'data')
cf_id = [s for s in os.listdir(snapshot_dir) if s.startswith(cf + "-")][0]
snapshot_dir = glob.glob("{snapshot_dir}/{cf_id}/snapshots/{name}".format(**locals()))[0]
if not os.path.exists(os.path.join(data_dir, ks)):
os.mkdir(os.path.join(data_dir, ks))
os.mkdir(os.path.join(data_dir, ks, cf_id))
debug("snapshot_dir is : " + snapshot_dir)
distutils.dir_util.copy_tree(snapshot_dir, os.path.join(data_dir, ks, cf_id))
@since('2.1')
def test_archive_commitlog(self):
self.run_archive_commitlog(restore_point_in_time=False)
def test_archive_commitlog_with_active_commitlog(self):
"""Copy the active commitlogs to the archive directory before restoration"""
self.run_archive_commitlog(restore_point_in_time=False, archive_active_commitlogs=True)
def dont_test_archive_commitlog(self):
"""Run the archive commitlog test, but forget to add the restore commands:"""
self.run_archive_commitlog(restore_point_in_time=False, restore_archived_commitlog=False)
def test_archive_commitlog_point_in_time(self):
"""Test archive commit log with restore_point_in_time setting"""
self.run_archive_commitlog(restore_point_in_time=True)
def test_archive_commitlog_point_in_time_with_active_commitlog(self):
"""Test archive commit log with restore_point_in_time setting"""
self.run_archive_commitlog(restore_point_in_time=True, archive_active_commitlogs=True)
def run_archive_commitlog(self, restore_point_in_time=False, restore_archived_commitlog=True, archive_active_commitlogs=False):
"""Run archive commit log restoration test"""
cluster = self.cluster
cluster.populate(1)
(node1,) = cluster.nodelist()
# Create a temp directory for storing commitlog archives:
tmp_commitlog = safe_mkdtemp()
debug("tmp_commitlog: " + tmp_commitlog)
# Edit commitlog_archiving.properties and set an archive
# command:
replace_in_file(os.path.join(node1.get_path(), 'conf', 'commitlog_archiving.properties'),
[(r'^archive_command=.*$', 'archive_command=cp %path {tmp_commitlog}/%name'.format(
tmp_commitlog=tmp_commitlog))])
cluster.start()
session = self.patient_cql_connection(node1)
self.create_ks(session, 'ks', 1)
session.execute('CREATE TABLE ks.cf ( key bigint PRIMARY KEY, val text);')
debug("Writing first 30,000 rows...")
self.insert_rows(session, 0, 30000)
# Record when this first set of inserts finished:
insert_cutoff_times = [time.gmtime()]
# Delete all commitlog backups so far:
for f in glob.glob(tmp_commitlog + "/*"):
os.remove(f)
snapshot_dir = self.make_snapshot(node1, 'ks', 'cf', 'basic')
if self.cluster.version() >= '3.0':
system_ks_snapshot_dir = self.make_snapshot(node1, 'system_schema', 'keyspaces', 'keyspaces')
else:
system_ks_snapshot_dir = self.make_snapshot(node1, 'system', 'schema_keyspaces', 'keyspaces')
if self.cluster.version() >= '3.0':
system_col_snapshot_dir = self.make_snapshot(node1, 'system_schema', 'columns', 'columns')
else:
system_col_snapshot_dir = self.make_snapshot(node1, 'system', 'schema_columns', 'columns')
if self.cluster.version() >= '3.0':
system_ut_snapshot_dir = self.make_snapshot(node1, 'system_schema', 'types', 'usertypes')
elif self.cluster.version() >= '2.1':
system_ut_snapshot_dir = self.make_snapshot(node1, 'system', 'schema_usertypes', 'usertypes')
if self.cluster.version() >= '3.0':
system_cfs_snapshot_dir = self.make_snapshot(node1, 'system_schema', 'tables', 'cfs')
else:
system_cfs_snapshot_dir = self.make_snapshot(node1, 'system', 'schema_columnfamilies', 'cfs')
try:
# Write more data:
debug("Writing second 30,000 rows...")
self.insert_rows(session, 30000, 60000)
node1.flush()
time.sleep(10)
# Record when this second set of inserts finished:
insert_cutoff_times.append(time.gmtime())
debug("Writing final 5,000 rows...")
self.insert_rows(session, 60000, 65000)
# Record when the third set of inserts finished:
insert_cutoff_times.append(time.gmtime())
rows = session.execute('SELECT count(*) from ks.cf')
# Make sure we have the same amount of rows as when we snapshotted:
self.assertEqual(rows[0][0], 65000)
# Check that there are at least one commit log backed up that
# is not one of the active commit logs:
commitlog_dir = os.path.join(node1.get_path(), 'commitlogs')
debug("node1 commitlog dir: " + commitlog_dir)
self.assertTrue(len(set(os.listdir(tmp_commitlog)) - set(os.listdir(commitlog_dir))) > 0)
cluster.flush()
cluster.compact()
node1.drain()
if archive_active_commitlogs:
# restart the node which causes the active commitlogs to be archived
node1.stop()
node1.start(wait_for_binary_proto=True)
# Destroy the cluster
cluster.stop()
self.copy_logs(name=self.id().split(".")[0] + "_pre-restore")
self._cleanup_cluster()
cluster = self.cluster = self._get_cluster()
cluster.populate(1)
node1, = cluster.nodelist()
# Restore schema from snapshots:
if self.cluster.version() >= '3.0':
self.restore_snapshot(system_ks_snapshot_dir, node1, 'system_schema', 'keyspaces', 'keyspaces')
else:
self.restore_snapshot(system_ks_snapshot_dir, node1, 'system', 'schema_keyspaces', 'keyspaces')
if self.cluster.version() >= '3.0':
self.restore_snapshot(system_col_snapshot_dir, node1, 'system_schema', 'columns', 'columns')
else:
self.restore_snapshot(system_col_snapshot_dir, node1, 'system', 'schema_columns', 'columns')
if self.cluster.version() >= '3.0':
self.restore_snapshot(system_ut_snapshot_dir, node1, 'system_schema', 'types', 'usertypes')
elif self.cluster.version() >= '2.1':
self.restore_snapshot(system_ut_snapshot_dir, node1, 'system', 'schema_usertypes', 'usertypes')
if self.cluster.version() >= '3.0':
self.restore_snapshot(system_cfs_snapshot_dir, node1, 'system_schema', 'tables', 'cfs')
else:
self.restore_snapshot(system_cfs_snapshot_dir, node1, 'system', 'schema_columnfamilies', 'cfs')
self.restore_snapshot(snapshot_dir, node1, 'ks', 'cf', 'basic')
cluster.start(wait_for_binary_proto=True)
session = self.patient_cql_connection(node1)
node1.nodetool('refresh ks cf')
rows = session.execute('SELECT count(*) from ks.cf')
# Make sure we have the same amount of rows as when we snapshotted:
self.assertEqual(rows[0][0], 30000)
# Edit commitlog_archiving.properties. Remove the archive
# command and set a restore command and restore_directories:
if restore_archived_commitlog:
replace_in_file(os.path.join(node1.get_path(), 'conf', 'commitlog_archiving.properties'),
[(r'^archive_command=.*$', 'archive_command='),
(r'^restore_command=.*$', 'restore_command=cp -f %from %to'),
(r'^restore_directories=.*$', 'restore_directories={tmp_commitlog}'.format(
tmp_commitlog=tmp_commitlog))])
if restore_point_in_time:
restore_time = time.strftime("%Y:%m:%d %H:%M:%S", insert_cutoff_times[1])
replace_in_file(os.path.join(node1.get_path(), 'conf', 'commitlog_archiving.properties'),
[(r'^restore_point_in_time=.*$', 'restore_point_in_time={restore_time}'.format(**locals()))])
debug("Restarting node1..")
node1.stop()
node1.start(wait_for_binary_proto=True)
node1.nodetool('flush')
node1.nodetool('compact')
session = self.patient_cql_connection(node1)
rows = session.execute('SELECT count(*) from ks.cf')
# Now we should have 30000 rows from the snapshot + 30000 rows
# from the commitlog backups:
if not restore_archived_commitlog:
self.assertEqual(rows[0][0], 30000)
elif restore_point_in_time:
self.assertEqual(rows[0][0], 60000)
else:
self.assertEqual(rows[0][0], 65000)
finally:
# clean up
debug("removing snapshot_dir: " + snapshot_dir)
shutil.rmtree(snapshot_dir)
debug("removing snapshot_dir: " + system_ks_snapshot_dir)
shutil.rmtree(system_ks_snapshot_dir)
debug("removing snapshot_dir: " + system_cfs_snapshot_dir)
shutil.rmtree(system_cfs_snapshot_dir)
if self.cluster.version() >= '2.1':
debug("removing snapshot_dir: " + system_ut_snapshot_dir)
shutil.rmtree(system_ut_snapshot_dir)
debug("removing snapshot_dir: " + system_col_snapshot_dir)
shutil.rmtree(system_col_snapshot_dir)
debug("removing tmp_commitlog: " + tmp_commitlog)
shutil.rmtree(tmp_commitlog)