def test_upgrade_oplog_progress(self):
first_oplog_ts1 = self.opman1.oplog.find_one()['ts']
first_oplog_ts2 = self.opman2.oplog.find_one()['ts']
# Old format oplog progress file:
progress = {
str(self.opman1.oplog): bson_ts_to_long(first_oplog_ts1),
str(self.opman2.oplog): bson_ts_to_long(first_oplog_ts2)
}
# Set up oplog managers to use the old format.
oplog_progress = LockingDict()
oplog_progress.dict = progress
self.opman1.oplog_progress = oplog_progress
self.opman2.oplog_progress = oplog_progress
# Cause the oplog managers to update their checkpoints.
self.opman1.update_checkpoint(first_oplog_ts1)
self.opman2.update_checkpoint(first_oplog_ts2)
# New format should be in place now.
new_format = {
self.opman1.replset_name: first_oplog_ts1,
self.opman2.replset_name: first_oplog_ts2
}
self.assertEqual(
new_format,
self.opman1.oplog_progress.get_dict()
)
self.assertEqual(
new_format,
self.opman2.oplog_progress.get_dict()
)
def test_upgrade_oplog_progress(self):
first_oplog_ts1 = self.opman1.oplog.find_one()['ts']
first_oplog_ts2 = self.opman2.oplog.find_one()['ts']
# Old format oplog progress file:
progress = {
str(self.opman1.oplog): bson_ts_to_long(first_oplog_ts1),
str(self.opman2.oplog): bson_ts_to_long(first_oplog_ts2)
}
# Set up oplog managers to use the old format.
oplog_progress = LockingDict()
oplog_progress.dict = progress
self.opman1.oplog_progress = oplog_progress
self.opman2.oplog_progress = oplog_progress
# Cause the oplog managers to update their checkpoints.
self.opman1.update_checkpoint(first_oplog_ts1)
self.opman2.update_checkpoint(first_oplog_ts2)
# New format should be in place now.
new_format = {
self.opman1.replset_name: first_oplog_ts1,
self.opman2.replset_name: first_oplog_ts2
}
self.assertEqual(
new_format,
self.opman1.oplog_progress.get_dict()
)
self.assertEqual(
new_format,
self.opman2.oplog_progress.get_dict()
)
def test_init_cursor(self):
"""Test init_cursor in oplog_manager. Assertion failure if it
doesn't pass
"""
test_oplog, primary_conn, search_ts = self.get_oplog_thread()
test_oplog.checkpoint = None # needed for these tests
# initial tests with no config file and empty oplog
self.assertEqual(test_oplog.init_cursor(), None)
# no config, single oplog entry
primary_conn['test']['test'].insert({'name': 'paulie'})
search_ts = test_oplog.get_last_oplog_timestamp()
cursor = test_oplog.init_cursor()
self.assertEqual(cursor.count(), 1)
self.assertEqual(test_oplog.checkpoint, search_ts)
# with config file, assert that size != 0
os.system('touch temp_config.txt')
cursor = test_oplog.init_cursor()
oplog_dict = test_oplog.oplog_progress.get_dict()
self.assertEqual(cursor.count(), 1)
self.assertTrue(str(test_oplog.oplog) in oplog_dict)
self.assertTrue(
oplog_dict[str(test_oplog.oplog)] == test_oplog.checkpoint)
os.system('rm temp_config.txt')
# test init_cursor when OplogThread created with/without no-dump option
# insert some documents (will need to be dumped)
primary_conn['test']['test'].remove()
primary_conn['test']['test'].insert(({"_id": i} for i in range(100)))
# test no-dump option
docman = test_oplog.doc_managers[0]
docman._delete()
test_oplog.collection_dump = False
test_oplog.oplog_progress = LockingDict()
# init_cursor has the side-effect of causing a collection dump
test_oplog.init_cursor()
self.assertEqual(len(docman._search()), 0)
# test w/o no-dump option
docman._delete()
test_oplog.collection_dump = True
test_oplog.oplog_progress = LockingDict()
test_oplog.init_cursor()
self.assertEqual(len(docman._search()), 100)
def get_oplog_thread(cls):
""" Set up connection with mongo. Returns oplog, the connection and
oplog collection
This function clears the oplog
"""
is_sharded = True
primary_conn = Connection(HOSTNAME, int(PORTS_ONE["PRIMARY"]))
if primary_conn['admin'].command("isMaster")['ismaster'] is False:
primary_conn = Connection(HOSTNAME, int(PORTS_ONE["SECONDARY"]))
primary_conn['test']['test'].drop()
mongos_addr = "%s:%s" % (HOSTNAME, PORTS_ONE['MAIN'])
if PORTS_ONE["MAIN"] == PORTS_ONE["PRIMARY"]:
mongos_addr = "%s:%s" % (HOSTNAME, PORTS_ONE['MAIN'])
is_sharded = False
oplog_coll = primary_conn['local']['oplog.rs']
oplog_coll.drop() # reset the oplog
primary_conn['local'].create_collection('oplog.rs', capped=True,
size=1000000)
namespace_set = ['test.test']
doc_manager = DocManager()
oplog = OplogThread(primary_conn, mongos_addr, oplog_coll, is_sharded,
doc_manager, LockingDict(),
namespace_set, cls.AUTH_KEY, AUTH_USERNAME,
repl_set="demo-repl")
return(oplog, primary_conn, oplog_coll)
def setUp(self):
# Create a new oplog progress file
try:
os.unlink("oplog.timestamp")
except OSError:
pass
open("oplog.timestamp", "w").close()
# Start a replica set
self.repl_set = ReplicaSet().start()
# Connection to the replica set as a whole
self.main_conn = self.repl_set.client()
# Connection to the primary specifically
self.primary_conn = self.repl_set.primary.client()
# Connection to the secondary specifically
self.secondary_conn = self.repl_set.secondary.client(
read_preference=ReadPreference.SECONDARY_PREFERRED)
# Wipe any test data
self.main_conn["test"]["mc"].drop()
# Oplog thread
doc_manager = DocManager()
oplog_progress = LockingDict()
self.opman = OplogThread(primary_client=self.main_conn,
doc_managers=(doc_manager, ),
oplog_progress_dict=oplog_progress,
ns_set=["test.mc"])
def get_oplog_thread(cls):
""" Set up connection with mongo.
Returns oplog, the connection and oplog collection.
This function clears the oplog.
"""
primary_conn = Connection(HOSTNAME, int(PORTS_ONE["PRIMARY"]))
if primary_conn['admin'].command("isMaster")['ismaster'] is False:
primary_conn = Connection(HOSTNAME, int(PORTS_ONE["SECONDARY"]))
mongos_addr = "%s:%s" % (HOSTNAME, PORTS_ONE["MONGOS"])
mongos = Connection(mongos_addr)
mongos['alpha']['foo'].drop()
oplog_coll = primary_conn['local']['oplog.rs']
oplog_coll.drop() # reset the oplog
primary_conn['local'].create_collection('oplog.rs',
capped=True,
size=1000000)
namespace_set = ['test.test', 'alpha.foo']
doc_manager = DocManager()
oplog = OplogThread(primary_conn,
mongos_addr, oplog_coll, True, doc_manager,
LockingDict(), namespace_set, cls.AUTH_KEY,
AUTH_USERNAME)
return (oplog, primary_conn, oplog_coll, mongos)
def get_new_oplog(cls):
""" Set up connection with mongo. Returns oplog, the connection and
oplog collection
This function does not clear the oplog
"""
is_sharded = True
primary_conn = Connection(HOSTNAME, int(PORTS_ONE["PRIMARY"]))
if primary_conn['admin'].command("isMaster")['ismaster'] is False:
primary_conn = Connection(HOSTNAME, int(PORTS_ONE["SECONDARY"]))
mongos_addr = "%s:%s" % (HOSTNAME, PORTS_ONE['MAIN'])
if PORTS_ONE["MAIN"] == PORTS_ONE["PRIMARY"]:
mongos_addr = "%s:%s" % (HOSTNAME, PORTS_ONE['MAIN'])
is_sharded = False
oplog_coll = primary_conn['local']['oplog.rs']
namespace_set = ['test.test']
doc_manager = DocManager()
oplog = OplogThread(primary_conn=primary_conn,
main_address=mongos_addr,
oplog_coll=oplog_coll,
is_sharded=is_sharded,
doc_manager=doc_manager,
oplog_progress_dict=LockingDict(),
namespace_set=namespace_set,
auth_key=cls.AUTH_KEY,
auth_username=AUTH_USERNAME,
repl_set="demo-repl")
return (oplog, primary_conn, oplog.main_connection, oplog_coll)
def test_skipped_oplog_entry_updates_checkpoint(self):
repl_set = ReplicaSetSingle().start()
conn = repl_set.client()
opman = OplogThread(
primary_client=conn,
doc_managers=(DocManager(),),
oplog_progress_dict=LockingDict(),
namespace_config=NamespaceConfig(namespace_set=["test.test"]),
)
opman.start()
# Insert a document into an included collection
conn["test"]["test"].insert_one({"test": 1})
last_ts = opman.get_last_oplog_timestamp()
assert_soon(
lambda: last_ts == opman.checkpoint,
"OplogThread never updated checkpoint to non-skipped " "entry.",
)
self.assertEqual(len(opman.doc_managers[0]._search()), 1)
# Make sure that the oplog thread updates its checkpoint on every
# oplog entry.
conn["test"]["ignored"].insert_one({"test": 1})
last_ts = opman.get_last_oplog_timestamp()
assert_soon(
lambda: last_ts == opman.checkpoint,
"OplogThread never updated checkpoint to skipped entry.",
)
opman.join()
conn.close()
repl_set.stop()
def setUp(self):
self.repl_set = ReplicaSet().start()
self.primary_conn = self.repl_set.client()
self.oplog_coll = self.primary_conn.local['oplog.rs']
self.opman = OplogThread(primary_client=self.primary_conn,
doc_managers=(DocManager(), ),
oplog_progress_dict=LockingDict())
def setUp(self):
self.namespace_config = NamespaceConfig()
self.opman = OplogThread(
primary_client=self.primary_conn,
doc_managers=(DocManager(), ),
oplog_progress_dict=LockingDict(),
namespace_config=self.namespace_config,
)
def reset_opman(self, include_ns=None, exclude_ns=None, dest_mapping=None):
self.namespace_config = NamespaceConfig(namespace_set=include_ns,
ex_namespace_set=exclude_ns,
namespace_options=dest_mapping)
self.opman = OplogThread(primary_client=self.primary_conn,
doc_managers=(DocManager(), ),
oplog_progress_dict=LockingDict(),
namespace_config=self.namespace_config)
def test_fields_and_exclude(self):
fields = ['a', 'b', 'c', '_id']
exclude_fields = ['x', 'y', 'z']
# Test setting both to None in constructor
opman = OplogThread(primary_client=self.primary_conn,
doc_managers=(DocManager(), ),
oplog_progress_dict=LockingDict(),
dest_mapping_stru=self.dest_mapping_stru,
fields=None,
exclude_fields=None)
self._check_fields(opman, [], [], None)
opman = OplogThread(primary_client=self.primary_conn,
doc_managers=(DocManager(), ),
oplog_progress_dict=LockingDict(),
dest_mapping_stru=self.dest_mapping_stru,
fields=None,
exclude_fields=exclude_fields)
self._check_fields(opman, [], exclude_fields,
dict((f, 0) for f in exclude_fields))
# Test setting fields when exclude_fields is set
self.assertRaises(errors.InvalidConfiguration, setattr, opman,
"fields", fields)
self.assertRaises(errors.InvalidConfiguration, setattr, opman,
"fields", None)
opman = OplogThread(primary_client=self.primary_conn,
doc_managers=(DocManager(), ),
oplog_progress_dict=LockingDict(),
dest_mapping_stru=self.dest_mapping_stru,
exclude_fields=None,
fields=fields)
self._check_fields(opman, fields, [], dict((f, 1) for f in fields))
self.assertRaises(errors.InvalidConfiguration, setattr, opman,
"exclude_fields", exclude_fields)
self.assertRaises(errors.InvalidConfiguration, setattr, opman,
"exclude_fields", None)
self.assertRaises(errors.InvalidConfiguration,
OplogThread,
self.primary_conn, (DocManager(), ),
LockingDict(),
self.dest_mapping_stru,
fields=fields,
exclude_fields=exclude_fields)
def setUp(self):
self.repl_set = ReplicaSetSingle().start()
self.primary_conn = self.repl_set.client()
self.oplog_coll = self.primary_conn.local['oplog.rs']
self.dest_mapping_stru = DestMapping([], [], {})
self.opman = OplogThread(
primary_client=self.primary_conn,
doc_managers=(DocManager(),),
oplog_progress_dict=LockingDict(),
dest_mapping_stru=self.dest_mapping_stru,
)
def setUp(self):
self.repl_set = ReplicaSetSingle().start()
self.primary_conn = self.repl_set.client()
self.oplog_coll = self.primary_conn.local["oplog.rs"]
self.opman = OplogThread(
primary_client=self.primary_conn,
doc_managers=(DocManager(),),
oplog_progress_dict=LockingDict(),
namespace_config=NamespaceConfig(
namespace_options={"test.*": True, "gridfs.*": {"gridfs": True}}
),
)
def test_dump_collection(self):
"""Test the dump_collection method
Cases:
1. empty oplog
2. non-empty oplog, with gridfs collections
3. non-empty oplog, specified a namespace-set, none of the oplog
entries are for collections in the namespace-set
"""
# Test with empty oplog
self.opman.oplog = self.primary_conn["test"]["emptycollection"]
last_ts = self.opman.dump_collection()
self.assertEqual(last_ts, None)
# Test with non-empty oplog with gridfs collections
self.opman.oplog = self.primary_conn["local"]["oplog.rs"]
# Insert 10 gridfs files
for i in range(10):
fs = gridfs.GridFS(self.primary_conn["gridfs"],
collection="test" + str(i))
fs.put(b"hello world")
# Insert 1000 documents
for i in range(1000):
self.primary_conn["test"]["test"].insert_one({
"i": i + 500
})
last_ts = self.opman.get_last_oplog_timestamp()
self.assertEqual(last_ts, self.opman.dump_collection())
self.assertEqual(len(self.opman.doc_managers[0]._search()), 1010)
# Case 3
# 1MB oplog so that we can rollover quickly
repl_set = ReplicaSetSingle(oplogSize=1).start()
conn = repl_set.client()
opman = OplogThread(
primary_client=conn,
doc_managers=(DocManager(),),
oplog_progress_dict=LockingDict(),
namespace_config=NamespaceConfig(namespace_set=["test.test"]),
)
# Insert a document into an included collection
conn["test"]["test"].insert_one({"test": 1})
# Cause the oplog to rollover on a non-included collection
while conn["local"]["oplog.rs"].find_one({"ns": "test.test"}):
conn["test"]["ignored"].insert_many(
[{"test": "1" * 1024} for _ in range(1024)])
last_ts = opman.get_last_oplog_timestamp()
self.assertEqual(last_ts, opman.dump_collection())
self.assertEqual(len(opman.doc_managers[0]._search()), 1)
conn.close()
repl_set.stop()
def test_dump_collection(self):
"""Test the dump_collection method
Cases:
1. empty oplog
2. non-empty oplog
3. non-empty oplog, specified a namespace-set, none of the oplog
entries are for collections in the namespace-set
"""
# Test with empty oplog
self.opman.oplog = self.primary_conn["test"]["emptycollection"]
last_ts = self.opman.dump_collection()
self.assertEqual(last_ts, None)
# Test with non-empty oplog
self.opman.oplog = self.primary_conn["local"]["oplog.rs"]
for i in range(1000):
self.primary_conn["test"]["test"].insert_one({
"i": i + 500
})
last_ts = self.opman.get_last_oplog_timestamp()
self.assertEqual(last_ts, self.opman.dump_collection())
self.assertEqual(len(self.opman.doc_managers[0]._search()), 1000)
# Case 3
# 1MB oplog so that we can rollover quickly
repl_set = ReplicaSetSingle(oplogSize=1).start()
conn = repl_set.client()
dest_mapping_stru = DestMapping(["test.test"], [], {})
opman = OplogThread(
primary_client=conn,
doc_managers=(DocManager(),),
oplog_progress_dict=LockingDict(),
dest_mapping_stru=dest_mapping_stru,
ns_set=set(["test.test"])
)
# Insert a document into a ns_set collection
conn["test"]["test"].insert_one({"test": 1})
# Cause the oplog to rollover on a non-ns_set collection
while conn["local"]["oplog.rs"].find_one({"ns": "test.test"}):
conn["test"]["ignored"].insert_many(
[{"test": "1" * 1024} for _ in range(1024)])
last_ts = opman.get_last_oplog_timestamp()
self.assertEqual(last_ts, opman.dump_collection())
self.assertEqual(len(opman.doc_managers[0]._search()), 1)
conn.close()
repl_set.stop()
def setUp(self):
_, _, self.primary_p = start_replica_set('test-oplog-manager')
self.primary_conn = pymongo.MongoClient(mongo_host, self.primary_p)
self.oplog_coll = self.primary_conn.local['oplog.rs']
self.opman = OplogThread(primary_conn=self.primary_conn,
main_address='%s:%d' %
(mongo_host, self.primary_p),
oplog_coll=self.oplog_coll,
is_sharded=False,
doc_manager=DocManager(),
oplog_progress_dict=LockingDict(),
namespace_set=None,
auth_key=None,
auth_username=None,
repl_set='test-oplog-manager')
def reset_opman(self, include_ns=None, exclude_ns=None, dest_mapping=None):
if include_ns is None:
include_ns = []
if exclude_ns is None:
exclude_ns = []
if dest_mapping is None:
dest_mapping = {}
# include_ns must not exist together with exclude_ns
# dest_mapping must exist together with include_ns
# those checks have been tested in test_config.py so we skip that here.
self.dest_mapping_stru = DestMapping(include_ns, exclude_ns,
dest_mapping)
self.opman = OplogThread(primary_client=self.primary_conn,
doc_managers=(DocManager(), ),
oplog_progress_dict=LockingDict(),
dest_mapping_stru=self.dest_mapping_stru,
ns_set=include_ns,
ex_ns_set=exclude_ns)
def get_new_oplog(cls):
""" Set up connection with mongo.
Returns oplog, the connection and oplog collection
This function does not clear the oplog
"""
primary_conn = Connection(HOSTNAME, int(PORTS_ONE["PRIMARY"]))
if primary_conn['admin'].command("isMaster")['ismaster'] is False:
primary_conn = Connection(HOSTNAME, int(PORTS_ONE["SECONDARY"]))
mongos = "%s:%s" % (HOSTNAME, PORTS_ONE["MONGOS"])
oplog_coll = primary_conn['local']['oplog.rs']
namespace_set = ['test.test', 'alpha.foo']
doc_manager = DocManager()
oplog = OplogThread(primary_conn, mongos, oplog_coll, True,
doc_manager, LockingDict(), namespace_set,
cls.AUTH_KEY, AUTH_USERNAME)
return (oplog, primary_conn, oplog_coll, oplog.main_connection)
def setUp(self):
# Create a new oplog progress file
try:
os.unlink("config.txt")
except OSError:
pass
open("config.txt", "w").close()
# Start a replica set
_, self.secondary_p, self.primary_p = start_replica_set('rollbacks')
# Connection to the replica set as a whole
self.main_conn = MongoClient('%s:%d' % (mongo_host, self.primary_p),
replicaSet='rollbacks')
# Connection to the primary specifically
self.primary_conn = MongoClient('%s:%d' % (mongo_host, self.primary_p))
# Connection to the secondary specifically
self.secondary_conn = MongoClient(
'%s:%d' % (mongo_host, self.secondary_p),
read_preference=ReadPreference.SECONDARY_PREFERRED
)
# Wipe any test data
self.main_conn["test"]["mc"].drop()
# Oplog thread
doc_manager = DocManager()
oplog_progress = LockingDict()
self.opman = OplogThread(
primary_conn=self.main_conn,
main_address='%s:%d' % (mongo_host, self.primary_p),
oplog_coll=self.main_conn["local"]["oplog.rs"],
is_sharded=False,
doc_manager=doc_manager,
oplog_progress_dict=oplog_progress,
namespace_set=["test.mc"],
auth_key=None,
auth_username=None,
repl_set="rollbacks"
)
def setUp(self):
# Create a new oplog progress file
try:
os.unlink("config.txt")
except OSError:
pass
open("config.txt", "w").close()
# Start a replica set
start_cluster(sharded=False, use_mongos=False)
# Connection to the replica set as a whole
self.main_conn = Connection("localhost:%s" % PORTS_ONE["PRIMARY"],
replicaSet="demo-repl")
# Connection to the primary specifically
self.primary_conn = Connection("localhost:%s" % PORTS_ONE["PRIMARY"])
# Connection to the secondary specifically
self.secondary_conn = Connection(
"localhost:%s" % PORTS_ONE["SECONDARY"],
read_preference=ReadPreference.SECONDARY_PREFERRED)
# Wipe any test data
self.main_conn["test"]["mc"].drop()
# Oplog thread
doc_manager = DocManager()
oplog_progress = LockingDict()
self.opman = OplogThread(
primary_conn=self.main_conn,
main_address="localhost:%s" % PORTS_ONE["PRIMARY"],
oplog_coll=self.main_conn["local"]["oplog.rs"],
is_sharded=False,
doc_manager=doc_manager,
oplog_progress_dict=oplog_progress,
namespace_set=["test.mc"],
auth_key=None,
auth_username=None,
repl_set="demo-repl")
def setUp(self):
self.dest_mapping_stru = DestMapping([], [], {})
self.opman = OplogThread(primary_client=self.primary_conn,
doc_managers=(DocManager(), ),
oplog_progress_dict=LockingDict(),
dest_mapping_stru=self.dest_mapping_stru)
class Connector(threading.Thread):
"""Checks the cluster for shards to tail.
"""
def __init__(self, address, oplog_checkpoint, target_url, ns_set,
u_key, auth_key, doc_manager=None, auth_username=None):
if doc_manager is not None:
doc_manager = imp.load_source('DocManager', doc_manager)
else:
from mongo_connector.doc_manager import DocManager
time.sleep(1)
super(Connector, self).__init__()
#can_run is set to false when we join the thread
self.can_run = True
#The name of the file that stores the progress of the OplogThreads
self.oplog_checkpoint = oplog_checkpoint
#main address - either mongos for sharded setups or a primary otherwise
self.address = address
#The URL of the target system
self.target_url = target_url
#The set of relevant namespaces to consider
self.ns_set = ns_set
#The key that is a unique document identifier for the target system.
#Not necessarily the mongo unique key.
self.u_key = u_key
#Password for authentication
self.auth_key = auth_key
#Username for authentication
self.auth_username = auth_username
#The set of OplogThreads created
self.shard_set = {}
#Dict of OplogThread/timestamp pairs to record progress
self.oplog_progress = LockingDict()
try:
if target_url is None:
if doc_manager is None: # imported using from... import
self.doc_manager = DocManager(unique_key=u_key)
else: # imported using load source
self.doc_manager = doc_manager.DocManager(unique_key=u_key)
else:
if doc_manager is None:
self.doc_manager = DocManager(self.target_url,
unique_key=u_key)
else:
self.doc_manager = doc_manager.DocManager(self.target_url,
unique_key=u_key)
except errors.ConnectionFailed:
err_msg = "MongoConnector: Could not connect to target system"
logging.critical(err_msg)
self.can_run = False
return
if self.oplog_checkpoint is not None:
if not os.path.exists(self.oplog_checkpoint):
info_str = ("MongoConnector: Can't find %s, "
"attempting to create an empty progress log" %
self.oplog_checkpoint)
logging.info(info_str)
try:
# Create oplog progress file
open(self.oplog_checkpoint, "w").close()
except IOError as e:
logging.critical("MongoConnector: Could not "
"create a progress log: %s" %
str(e))
sys.exit(1)
else:
if (not os.access(self.oplog_checkpoint, os.W_OK)
and not os.access(self.oplog_checkpoint, os.R_OK )):
logging.critical("Invalid permissions on %s! Exiting" %
(self.oplog_checkpoint))
sys.exit(1)
def join(self):
""" Joins thread, stops it from running
"""
self.can_run = False
self.doc_manager.stop()
threading.Thread.join(self)
def write_oplog_progress(self):
""" Writes oplog progress to file provided by user
"""
if self.oplog_checkpoint is None:
return None
# write to temp file
backup_file = self.oplog_checkpoint + '.backup'
os.rename(self.oplog_checkpoint, backup_file)
# for each of the threads write to file
with open(self.oplog_checkpoint, 'w') as dest:
with self.oplog_progress as oplog_prog:
oplog_dict = oplog_prog.get_dict()
for oplog, time_stamp in oplog_dict.items():
oplog_str = str(oplog)
timestamp = util.bson_ts_to_long(time_stamp)
json_str = json.dumps([oplog_str, timestamp])
try:
dest.write(json_str)
except IOError:
# Basically wipe the file, copy from backup
dest.truncate()
with open(backup_file, 'r') as backup:
shutil.copyfile(backup, dest)
break
os.remove(self.oplog_checkpoint + '.backup')
def read_oplog_progress(self):
"""Reads oplog progress from file provided by user.
This method is only called once before any threads are spanwed.
"""
if self.oplog_checkpoint is None:
return None
# Check for empty file
try:
if os.stat(self.oplog_checkpoint).st_size == 0:
logging.info("MongoConnector: Empty oplog progress file.")
return None
except OSError:
return None
source = open(self.oplog_checkpoint, 'r')
try:
data = json.load(source)
except ValueError: # empty file
reason = "It may be empty or corrupt."
logging.info("MongoConnector: Can't read oplog progress file. %s" %
(reason))
source.close()
return None
source.close()
count = 0
oplog_dict = self.oplog_progress.get_dict()
for count in range(0, len(data), 2):
oplog_str = data[count]
time_stamp = data[count + 1]
oplog_dict[oplog_str] = util.long_to_bson_ts(time_stamp)
#stored as bson_ts
def run(self):
"""Discovers the mongo cluster and creates a thread for each primary.
"""
main_conn = Connection(self.address)
if self.auth_key is not None:
main_conn['admin'].authenticate(self.auth_username, self.auth_key)
self.read_oplog_progress()
conn_type = None
try:
main_conn.admin.command("isdbgrid")
except pymongo.errors.OperationFailure:
conn_type = "REPLSET"
if conn_type == "REPLSET":
#non sharded configuration
oplog_coll = main_conn['local']['oplog.rs']
prim_admin = main_conn.admin
repl_set = prim_admin.command("replSetGetStatus")['set']
oplog = oplog_manager.OplogThread(main_conn,
(main_conn.host + ":" + str(main_conn.port)),
oplog_coll,
False, self.doc_manager,
self.oplog_progress,
self.ns_set, self.auth_key,
self.auth_username,
repl_set=repl_set)
self.shard_set[0] = oplog
logging.info('MongoConnector: Starting connection thread %s' %
main_conn)
oplog.start()
while self.can_run:
if not self.shard_set[0].running:
logging.error("MongoConnector: OplogThread"
" %s unexpectedly stopped! Shutting down" %
(str(self.shard_set[0])))
self.oplog_thread_join()
self.doc_manager.stop()
return
self.write_oplog_progress()
time.sleep(1)
else: # sharded cluster
while self.can_run is True:
for shard_doc in main_conn['config']['shards'].find():
shard_id = shard_doc['_id']
if shard_id in self.shard_set:
if not self.shard_set[shard_id].running:
logging.error("MongoConnector: OplogThread"
" %s unexpectedly stopped! Shutting down" %
(str(self.shard_set[shard_id])))
self.oplog_thread_join()
self.doc_manager.stop()
return
self.write_oplog_progress()
time.sleep(1)
continue
try:
repl_set, hosts = shard_doc['host'].split('/')
except ValueError:
cause = "The system only uses replica sets!"
logging.error("MongoConnector: %s", cause)
self.oplog_thread_join()
self.doc_manager.stop()
return
shard_conn = Connection(hosts, replicaset=repl_set)
oplog_coll = shard_conn['local']['oplog.rs']
oplog = oplog_manager.OplogThread(shard_conn, self.address,
oplog_coll, True,
self.doc_manager,
self.oplog_progress,
self.ns_set,
self.auth_key,
self.auth_username)
self.shard_set[shard_id] = oplog
msg = "Starting connection thread"
logging.info("MongoConnector: %s %s" % (msg, shard_conn))
oplog.start()
self.oplog_thread_join()
self.write_oplog_progress()
def oplog_thread_join(self):
"""Stops all the OplogThreads
"""
logging.info('MongoConnector: Stopping all OplogThreads')
for thread in self.shard_set.values():
thread.join()
def test_exclude_fields_constructor(self):
# Test with the "_id" field in exclude_fields
exclude_fields = ["_id", "title", "content", "author"]
opman = OplogThread(primary_client=self.primary_conn,
doc_managers=(DocManager(), ),
oplog_progress_dict=LockingDict(),
dest_mapping_stru=self.dest_mapping_stru,
exclude_fields=exclude_fields)
exclude_fields.remove('_id')
self._check_fields(opman, [], exclude_fields,
dict((f, 0) for f in exclude_fields))
extra_fields = exclude_fields + ['extra1', 'extra2']
filtered = opman.filter_oplog_entry({
'op':
'i',
'o':
dict((f, 1) for f in extra_fields)
})['o']
self.assertEqual(dict((f, 1) for f in ['extra1', 'extra2']), filtered)
# Test without "_id" field included in exclude_fields
exclude_fields = ["title", "content", "author"]
opman = OplogThread(primary_client=self.primary_conn,
doc_managers=(DocManager(), ),
oplog_progress_dict=LockingDict(),
dest_mapping_stru=self.dest_mapping_stru,
exclude_fields=exclude_fields)
self._check_fields(opman, [], exclude_fields,
dict((f, 0) for f in exclude_fields))
extra_fields = extra_fields + ['extra1', 'extra2']
filtered = opman.filter_oplog_entry({
'op':
'i',
'o':
dict((f, 1) for f in extra_fields)
})['o']
self.assertEqual({'extra1': 1, 'extra2': 1}, filtered)
# Test with only "_id" field in exclude_fields
exclude_fields = ["_id"]
opman = OplogThread(primary_client=self.primary_conn,
doc_managers=(DocManager(), ),
oplog_progress_dict=LockingDict(),
dest_mapping_stru=self.dest_mapping_stru,
exclude_fields=exclude_fields)
self._check_fields(opman, [], [], None)
extra_fields = exclude_fields + ['extra1', 'extra2']
filtered = opman.filter_oplog_entry({
'op':
'i',
'o':
dict((f, 1) for f in extra_fields)
})['o']
self.assertEqual(dict((f, 1) for f in extra_fields), filtered)
# Test with nothing set for exclude_fields
opman = OplogThread(primary_client=self.primary_conn,
doc_managers=(DocManager(), ),
oplog_progress_dict=LockingDict(),
dest_mapping_stru=self.dest_mapping_stru,
exclude_fields=None)
self._check_fields(opman, [], [], None)
extra_fields = ['_id', 'extra1', 'extra2']
filtered = opman.filter_oplog_entry({
'op':
'i',
'o':
dict((f, 1) for f in extra_fields)
})['o']
self.assertEqual(dict((f, 1) for f in extra_fields), filtered)
def test_fields_constructor(self):
# Test with "_id" field in constructor
fields = ["_id", "title", "content", "author"]
opman = OplogThread(primary_client=self.primary_conn,
doc_managers=(DocManager(), ),
oplog_progress_dict=LockingDict(),
dest_mapping_stru=self.dest_mapping_stru,
fields=fields)
self._check_fields(opman, fields, [], dict((f, 1) for f in fields))
extra_fields = fields + ['extra1', 'extra2']
filtered = opman.filter_oplog_entry({
'op':
'i',
'o':
dict((f, 1) for f in extra_fields)
})['o']
self.assertEqual(dict((f, 1) for f in fields), filtered)
# Test without "_id" field in constructor
fields = ["title", "content", "author"]
opman = OplogThread(primary_client=self.primary_conn,
doc_managers=(DocManager(), ),
oplog_progress_dict=LockingDict(),
dest_mapping_stru=self.dest_mapping_stru,
fields=fields)
fields.append('_id')
self._check_fields(opman, fields, [], dict((f, 1) for f in fields))
extra_fields = fields + ['extra1', 'extra2']
filtered = opman.filter_oplog_entry({
'op':
'i',
'o':
dict((f, 1) for f in extra_fields)
})['o']
self.assertEqual(dict((f, 1) for f in fields), filtered)
# Test with only "_id" field
fields = ["_id"]
opman = OplogThread(primary_client=self.primary_conn,
doc_managers=(DocManager(), ),
oplog_progress_dict=LockingDict(),
dest_mapping_stru=self.dest_mapping_stru,
fields=fields)
self._check_fields(opman, fields, [], dict((f, 1) for f in fields))
extra_fields = fields + ['extra1', 'extra2']
filtered = opman.filter_oplog_entry({
'op':
'i',
'o':
dict((f, 1) for f in extra_fields)
})['o']
self.assertEqual({'_id': 1}, filtered)
# Test with no fields set
opman = OplogThread(primary_client=self.primary_conn,
doc_managers=(DocManager(), ),
oplog_progress_dict=LockingDict(),
dest_mapping_stru=self.dest_mapping_stru)
self._check_fields(opman, [], [], None)
extra_fields = ['_id', 'extra1', 'extra2']
filtered = opman.filter_oplog_entry({
'op':
'i',
'o':
dict((f, 1) for f in extra_fields)
})['o']
self.assertEqual(dict((f, 1) for f in extra_fields), filtered)
def setUp(self):
self.repl_set = ReplicaSet().start()
self.primary_conn = self.repl_set.client()
self.oplog_progress = LockingDict()
self.opman = None
def __init__(self, mongo_address, doc_managers=None, **kwargs):
super(Connector, self).__init__()
# can_run is set to false when we join the thread
self.can_run = True
# The signal that caused the connector to stop or None
self.signal = None
# main address - either mongos for sharded setups or a primary otherwise
self.address = mongo_address
# connection to the main address
self.main_conn = None
# List of DocManager instances
if doc_managers:
self.doc_managers = doc_managers
else:
LOG.warning('No doc managers specified, using simulator.')
self.doc_managers = (simulator.DocManager(),)
# Password for authentication
self.auth_key = kwargs.pop('auth_key', None)
# Username for authentication
self.auth_username = kwargs.pop('auth_username', None)
# The name of the file that stores the progress of the OplogThreads
self.oplog_checkpoint = kwargs.pop('oplog_checkpoint',
'oplog.timestamp')
# The set of OplogThreads created
self.shard_set = {}
# Dict of OplogThread/timestamp pairs to record progress
self.oplog_progress = LockingDict()
# Timezone awareness
self.tz_aware = kwargs.get('tz_aware', False)
# SSL keyword arguments to MongoClient.
ssl_certfile = kwargs.pop('ssl_certfile', None)
ssl_ca_certs = kwargs.pop('ssl_ca_certs', None)
ssl_keyfile = kwargs.pop('ssl_keyfile', None)
ssl_cert_reqs = kwargs.pop('ssl_cert_reqs', None)
self.ssl_kwargs = {}
if ssl_certfile:
self.ssl_kwargs['ssl_certfile'] = ssl_certfile
if ssl_ca_certs:
self.ssl_kwargs['ssl_ca_certs'] = ssl_ca_certs
if ssl_keyfile:
self.ssl_kwargs['ssl_keyfile'] = ssl_keyfile
if ssl_cert_reqs:
self.ssl_kwargs['ssl_cert_reqs'] = ssl_cert_reqs
# Save the rest of kwargs.
self.kwargs = kwargs
# Replace the origin dest_mapping
self.dest_mapping = DestMapping(kwargs.get('ns_set', []),
kwargs.get('ex_ns_set', []),
kwargs.get('dest_mapping', {}))
# Initialize and set the command helper
command_helper = CommandHelper(self.dest_mapping)
for dm in self.doc_managers:
dm.command_helper = command_helper
if self.oplog_checkpoint is not None:
if not os.path.exists(self.oplog_checkpoint):
info_str = ("MongoConnector: Can't find %s, "
"attempting to create an empty progress log" %
self.oplog_checkpoint)
LOG.warning(info_str)
try:
# Create oplog progress file
open(self.oplog_checkpoint, "w").close()
except IOError as e:
LOG.critical("MongoConnector: Could not "
"create a progress log: %s" %
str(e))
sys.exit(2)
else:
if (not os.access(self.oplog_checkpoint, os.W_OK)
and not os.access(self.oplog_checkpoint, os.R_OK)):
LOG.critical("Invalid permissions on %s! Exiting" %
(self.oplog_checkpoint))
sys.exit(2)
def test_init_cursor(self):
"""Test the init_cursor method
Cases:
1. no last checkpoint, no collection dump
2. no last checkpoint, collection dump ok and stuff to dump
3. no last checkpoint, nothing to dump, stuff in oplog
4. no last checkpoint, nothing to dump, nothing in oplog
5. no last checkpoint, no collection dump, stuff in oplog
6. last checkpoint exists
7. last checkpoint is behind
"""
# N.B. these sub-cases build off of each other and cannot be re-ordered
# without side-effects
# No last checkpoint, no collection dump, nothing in oplog
# "change oplog collection" to put nothing in oplog
self.opman1.oplog = self.shard1_conn["test"]["emptycollection"]
self.opman2.oplog = self.shard2_conn["test"]["emptycollection"]
self.opman1.collection_dump = False
self.opman2.collection_dump = False
self.assertTrue(
all(doc['op'] == 'n' for doc in self.opman1.init_cursor()[0]))
self.assertEqual(self.opman1.checkpoint, None)
self.assertTrue(
all(doc['op'] == 'n' for doc in self.opman2.init_cursor()[0]))
self.assertEqual(self.opman2.checkpoint, None)
# No last checkpoint, empty collections, nothing in oplog
self.opman1.collection_dump = self.opman2.collection_dump = True
cursor, cursor_len = self.opman1.init_cursor()
self.assertEqual(cursor, None)
self.assertEqual(cursor_len, 0)
self.assertEqual(self.opman1.checkpoint, None)
cursor, cursor_len = self.opman2.init_cursor()
self.assertEqual(cursor, None)
self.assertEqual(cursor_len, 0)
self.assertEqual(self.opman2.checkpoint, None)
# No last checkpoint, empty collections, something in oplog
self.opman1.oplog = self.shard1_conn["local"]["oplog.rs"]
self.opman2.oplog = self.shard2_conn["local"]["oplog.rs"]
oplog_startup_ts = self.opman2.get_last_oplog_timestamp()
collection = self.mongos_conn["test"]["mcsharded"]
collection.insert({"i": 1})
collection.remove({"i": 1})
time.sleep(3)
last_ts1 = self.opman1.get_last_oplog_timestamp()
cursor, cursor_len = self.opman1.init_cursor()
self.assertEqual(cursor_len, 0)
self.assertEqual(self.opman1.checkpoint, last_ts1)
with self.opman1.oplog_progress as prog:
self.assertEqual(prog.get_dict()[str(self.opman1.oplog)], last_ts1)
# init_cursor should point to startup message in shard2 oplog
cursor, cursor_len = self.opman2.init_cursor()
self.assertEqual(cursor_len, 0)
self.assertEqual(self.opman2.checkpoint, oplog_startup_ts)
# No last checkpoint, no collection dump, stuff in oplog
progress = LockingDict()
self.opman1.oplog_progress = self.opman2.oplog_progress = progress
self.opman1.collection_dump = self.opman2.collection_dump = False
collection.insert({"i": 1200})
last_ts2 = self.opman2.get_last_oplog_timestamp()
self.opman1.init_cursor()
self.assertEqual(self.opman1.checkpoint, last_ts1)
with self.opman1.oplog_progress as prog:
self.assertEqual(prog.get_dict()[str(self.opman1.oplog)], last_ts1)
cursor, cursor_len = self.opman2.init_cursor()
for i in range(cursor_len - 1):
next(cursor)
self.assertEqual(next(cursor)["o"]["i"], 1200)
self.assertEqual(self.opman2.checkpoint, last_ts2)
with self.opman2.oplog_progress as prog:
self.assertEqual(prog.get_dict()[str(self.opman2.oplog)], last_ts2)
# Last checkpoint exists
progress = LockingDict()
self.opman1.oplog_progress = self.opman2.oplog_progress = progress
for i in range(1000):
collection.insert({"i": i + 500})
entry1 = list(self.shard1_conn["local"]["oplog.rs"].find(skip=200,
limit=2))
entry2 = list(self.shard2_conn["local"]["oplog.rs"].find(skip=200,
limit=2))
progress.get_dict()[str(self.opman1.oplog)] = entry1[0]["ts"]
progress.get_dict()[str(self.opman2.oplog)] = entry2[0]["ts"]
self.opman1.oplog_progress = self.opman2.oplog_progress = progress
self.opman1.checkpoint = self.opman2.checkpoint = None
cursor1, cursor_len1 = self.opman1.init_cursor()
cursor2, cursor_len2 = self.opman2.init_cursor()
self.assertEqual(entry1[1]["ts"], next(cursor1)["ts"])
self.assertEqual(entry2[1]["ts"], next(cursor2)["ts"])
self.assertEqual(self.opman1.checkpoint, entry1[0]["ts"])
self.assertEqual(self.opman2.checkpoint, entry2[0]["ts"])
with self.opman1.oplog_progress as prog:
self.assertEqual(prog.get_dict()[str(self.opman1.oplog)],
entry1[0]["ts"])
with self.opman2.oplog_progress as prog:
self.assertEqual(prog.get_dict()[str(self.opman2.oplog)],
entry2[0]["ts"])
# Last checkpoint is behind
progress = LockingDict()
progress.get_dict()[str(self.opman1.oplog)] = bson.Timestamp(1, 0)
progress.get_dict()[str(self.opman2.oplog)] = bson.Timestamp(1, 0)
self.opman1.oplog_progress = self.opman2.oplog_progress = progress
self.opman1.checkpoint = self.opman2.checkpoint = None
cursor, cursor_len = self.opman1.init_cursor()
self.assertEqual(cursor_len, 0)
self.assertEqual(cursor, None)
self.assertIsNotNone(self.opman1.checkpoint)
cursor, cursor_len = self.opman2.init_cursor()
self.assertEqual(cursor_len, 0)
self.assertEqual(cursor, None)
self.assertIsNotNone(self.opman2.checkpoint)
def __init__(self, address, oplog_checkpoint, target_url, ns_set,
u_key, auth_key, doc_manager=None, auth_username=None,
collection_dump=True, batch_size=constants.DEFAULT_BATCH_SIZE,
fields=None, dest_mapping={},
auto_commit_interval=constants.DEFAULT_COMMIT_INTERVAL,
continue_on_error=False):
if target_url and not doc_manager:
raise errors.ConnectorError("Cannot create a Connector with a "
"target URL but no doc manager!")
def is_string(s):
try:
return isinstance(s, basestring)
except NameError:
return isinstance(s, str)
def load_doc_manager(path):
name, _ = os.path.splitext(os.path.basename(path))
try:
import importlib.machinery
loader = importlib.machinery.SourceFileLoader(name, path)
module = loader.load_module(name)
except ImportError:
module = imp.load_source(name, path)
return module
doc_manager_modules = None
if doc_manager is not None:
# backwards compatilibity: doc_manager may be a string
if is_string(doc_manager):
doc_manager_modules = [load_doc_manager(doc_manager)]
# doc_manager is a list
else:
doc_manager_modules = []
for dm in doc_manager:
doc_manager_modules.append(load_doc_manager(dm))
super(Connector, self).__init__()
#can_run is set to false when we join the thread
self.can_run = True
#The name of the file that stores the progress of the OplogThreads
self.oplog_checkpoint = oplog_checkpoint
#main address - either mongos for sharded setups or a primary otherwise
self.address = address
#The URLs of each target system, respectively
if is_string(target_url):
self.target_urls = [target_url]
elif target_url:
self.target_urls = list(target_url)
else:
self.target_urls = None
#The set of relevant namespaces to consider
self.ns_set = ns_set
#The dict of source namespace to destination namespace
self.dest_mapping = dest_mapping
#Whether the collection dump gracefully handles exceptions
self.continue_on_error = continue_on_error
#The key that is a unique document identifier for the target system.
#Not necessarily the mongo unique key.
self.u_key = u_key
#Password for authentication
self.auth_key = auth_key
#Username for authentication
self.auth_username = auth_username
#The set of OplogThreads created
self.shard_set = {}
#Boolean chooses whether to dump the entire collection if no timestamp
# is present in the config file
self.collection_dump = collection_dump
#Num entries to process before updating config file with current pos
self.batch_size = batch_size
#Dict of OplogThread/timestamp pairs to record progress
self.oplog_progress = LockingDict()
# List of fields to export
self.fields = fields
try:
docman_kwargs = {"unique_key": u_key,
"namespace_set": ns_set,
"auto_commit_interval": auto_commit_interval}
# No doc managers specified, using simulator
if doc_manager is None:
self.doc_managers = [simulator.DocManager(**docman_kwargs)]
else:
self.doc_managers = []
for i, d in enumerate(doc_manager_modules):
# self.target_urls may be shorter than
# self.doc_managers, or left as None
if self.target_urls and i < len(self.target_urls):
target_url = self.target_urls[i]
else:
target_url = None
if target_url:
self.doc_managers.append(
d.DocManager(self.target_urls[i],
**docman_kwargs))
else:
self.doc_managers.append(
d.DocManager(**docman_kwargs))
# If more target URLs were given than doc managers, may need
# to create additional doc managers
for url in self.target_urls[i + 1:]:
self.doc_managers.append(
doc_manager_modules[-1].DocManager(url,
**docman_kwargs))
except errors.ConnectionFailed:
err_msg = "MongoConnector: Could not connect to target system"
logging.critical(err_msg)
self.can_run = False
return
if self.oplog_checkpoint is not None:
if not os.path.exists(self.oplog_checkpoint):
info_str = ("MongoConnector: Can't find %s, "
"attempting to create an empty progress log" %
self.oplog_checkpoint)
logging.info(info_str)
try:
# Create oplog progress file
open(self.oplog_checkpoint, "w").close()
except IOError as e:
logging.critical("MongoConnector: Could not "
"create a progress log: %s" %
str(e))
sys.exit(2)
else:
if (not os.access(self.oplog_checkpoint, os.W_OK)
and not os.access(self.oplog_checkpoint, os.R_OK)):
logging.critical("Invalid permissions on %s! Exiting" %
(self.oplog_checkpoint))
sys.exit(2)
def test_init_cursor(self):
"""Test the init_cursor method
Cases:
1. no last checkpoint, no collection dump
2. no last checkpoint, collection dump ok and stuff to dump
3. no last checkpoint, nothing to dump, stuff in oplog
4. no last checkpoint, nothing to dump, nothing in oplog
5. last checkpoint exists
"""
# N.B. these sub-cases build off of each other and cannot be re-ordered
# without side-effects
# No last checkpoint, no collection dump, nothing in oplog
# "change oplog collection" to put nothing in oplog
self.opman1.oplog = self.shard1_conn["test"]["emptycollection"]
self.opman2.oplog = self.shard2_conn["test"]["emptycollection"]
self.opman1.collection_dump = False
self.opman2.collection_dump = False
self.assertEqual(self.opman1.init_cursor(), None)
self.assertEqual(self.opman1.checkpoint, None)
self.assertEqual(self.opman2.init_cursor(), None)
self.assertEqual(self.opman2.checkpoint, None)
# No last checkpoint, empty collections, nothing in oplog
self.opman1.collection_dump = True
self.opman2.collection_dump = True
self.assertEqual(self.opman1.init_cursor(), None)
self.assertEqual(self.opman1.checkpoint, None)
self.assertEqual(self.opman2.init_cursor(), None)
self.assertEqual(self.opman2.checkpoint, None)
# No last checkpoint, empty collections, something in oplog
self.opman1.oplog = self.shard1_conn["local"]["oplog.rs"]
self.opman2.oplog = self.shard2_conn["local"]["oplog.rs"]
oplog_startup_ts = self.opman2.get_last_oplog_timestamp()
collection = self.mongos_conn["test"]["mcsharded"]
collection.insert({"i": 1})
collection.remove({"i": 1})
time.sleep(3)
last_ts1 = self.opman1.get_last_oplog_timestamp()
self.assertEqual(next(self.opman1.init_cursor())["ts"], last_ts1)
self.assertEqual(self.opman1.checkpoint, last_ts1)
with self.opman1.oplog_progress as prog:
self.assertEqual(prog.get_dict()[str(self.opman1.oplog)], last_ts1)
# init_cursor should point to startup message in shard2 oplog
cursor = self.opman2.init_cursor()
self.assertEqual(next(cursor)["ts"], oplog_startup_ts)
self.assertEqual(self.opman2.checkpoint, oplog_startup_ts)
# No last checkpoint, non-empty collections, stuff in oplog
progress = LockingDict()
self.opman1.oplog_progress = self.opman2.oplog_progress = progress
collection.insert({"i": 1200})
last_ts2 = self.opman2.get_last_oplog_timestamp()
self.assertEqual(next(self.opman1.init_cursor())["ts"], last_ts1)
self.assertEqual(self.opman1.checkpoint, last_ts1)
with self.opman1.oplog_progress as prog:
self.assertEqual(prog.get_dict()[str(self.opman1.oplog)], last_ts1)
self.assertEqual(next(self.opman2.init_cursor())["ts"], last_ts2)
self.assertEqual(self.opman2.checkpoint, last_ts2)
with self.opman2.oplog_progress as prog:
self.assertEqual(prog.get_dict()[str(self.opman2.oplog)], last_ts2)
# Last checkpoint exists
progress = LockingDict()
self.opman1.oplog_progress = self.opman2.oplog_progress = progress
for i in range(1000):
collection.insert({"i": i + 500})
entry1 = list(
self.shard1_conn["local"]["oplog.rs"].find(skip=200, limit=2))
entry2 = list(
self.shard2_conn["local"]["oplog.rs"].find(skip=200, limit=2))
progress.get_dict()[str(self.opman1.oplog)] = entry1[0]["ts"]
progress.get_dict()[str(self.opman2.oplog)] = entry2[0]["ts"]
self.opman1.oplog_progress = self.opman2.oplog_progress = progress
self.opman1.checkpoint = self.opman2.checkpoint = None
cursor1 = self.opman1.init_cursor()
cursor2 = self.opman2.init_cursor()
self.assertEqual(entry1[1]["ts"], next(cursor1)["ts"])
self.assertEqual(entry2[1]["ts"], next(cursor2)["ts"])
self.assertEqual(self.opman1.checkpoint, entry1[0]["ts"])
self.assertEqual(self.opman2.checkpoint, entry2[0]["ts"])
with self.opman1.oplog_progress as prog:
self.assertEqual(prog.get_dict()[str(self.opman1.oplog)],
entry1[0]["ts"])
with self.opman2.oplog_progress as prog:
self.assertEqual(prog.get_dict()[str(self.opman2.oplog)],
entry2[0]["ts"])
def test_init_cursor(self):
"""Test the init_cursor method
Cases:
1. no last checkpoint, no collection dump
2. no last checkpoint, collection dump ok and stuff to dump
3. no last checkpoint, nothing to dump, stuff in oplog
4. no last checkpoint, nothing to dump, nothing in oplog
5. no last checkpoint, no collection dump, stuff in oplog
6. last checkpoint exists
7. last checkpoint is behind
"""
# N.B. these sub-cases build off of each other and cannot be re-ordered
# without side-effects
# No last checkpoint, no collection dump, nothing in oplog
# "change oplog collection" to put nothing in oplog
self.opman1.oplog = self.shard1_conn["test"]["emptycollection"]
self.opman2.oplog = self.shard2_conn["test"]["emptycollection"]
self.opman1.collection_dump = False
self.opman2.collection_dump = False
self.assertTrue(all(doc['op'] == 'n'
for doc in self.opman1.init_cursor()[0]))
self.assertEqual(self.opman1.checkpoint, None)
self.assertTrue(all(doc['op'] == 'n'
for doc in self.opman2.init_cursor()[0]))
self.assertEqual(self.opman2.checkpoint, None)
# No last checkpoint, empty collections, nothing in oplog
self.opman1.collection_dump = self.opman2.collection_dump = True
cursor, cursor_len = self.opman1.init_cursor()
self.assertEqual(cursor, None)
self.assertEqual(cursor_len, 0)
self.assertEqual(self.opman1.checkpoint, None)
cursor, cursor_len = self.opman2.init_cursor()
self.assertEqual(cursor, None)
self.assertEqual(cursor_len, 0)
self.assertEqual(self.opman2.checkpoint, None)
# No last checkpoint, empty collections, something in oplog
self.opman1.oplog = self.shard1_conn["local"]["oplog.rs"]
self.opman2.oplog = self.shard2_conn["local"]["oplog.rs"]
oplog_startup_ts = self.opman2.get_last_oplog_timestamp()
collection = self.mongos_conn["test"]["mcsharded"]
collection.insert_one({"i": 1})
collection.delete_one({"i": 1})
time.sleep(3)
last_ts1 = self.opman1.get_last_oplog_timestamp()
cursor, cursor_len = self.opman1.init_cursor()
self.assertEqual(cursor_len, 0)
self.assertEqual(self.opman1.checkpoint, last_ts1)
with self.opman1.oplog_progress as prog:
self.assertEqual(prog.get_dict()[str(self.opman1.oplog)], last_ts1)
# init_cursor should point to startup message in shard2 oplog
cursor, cursor_len = self.opman2.init_cursor()
self.assertEqual(cursor_len, 0)
self.assertEqual(self.opman2.checkpoint, oplog_startup_ts)
# No last checkpoint, no collection dump, stuff in oplog
progress = LockingDict()
self.opman1.oplog_progress = self.opman2.oplog_progress = progress
self.opman1.collection_dump = self.opman2.collection_dump = False
collection.insert_one({"i": 1200})
last_ts2 = self.opman2.get_last_oplog_timestamp()
self.opman1.init_cursor()
self.assertEqual(self.opman1.checkpoint, last_ts1)
with self.opman1.oplog_progress as prog:
self.assertEqual(prog.get_dict()[str(self.opman1.oplog)], last_ts1)
cursor, cursor_len = self.opman2.init_cursor()
for i in range(cursor_len - 1):
next(cursor)
self.assertEqual(next(cursor)["o"]["i"], 1200)
self.assertEqual(self.opman2.checkpoint, last_ts2)
with self.opman2.oplog_progress as prog:
self.assertEqual(prog.get_dict()[str(self.opman2.oplog)], last_ts2)
# Last checkpoint exists
progress = LockingDict()
self.opman1.oplog_progress = self.opman2.oplog_progress = progress
for i in range(1000):
collection.insert_one({"i": i + 500})
entry1 = list(
self.shard1_conn["local"]["oplog.rs"].find(skip=200, limit=-2))
entry2 = list(
self.shard2_conn["local"]["oplog.rs"].find(skip=200, limit=-2))
progress.get_dict()[str(self.opman1.oplog)] = entry1[0]["ts"]
progress.get_dict()[str(self.opman2.oplog)] = entry2[0]["ts"]
self.opman1.oplog_progress = self.opman2.oplog_progress = progress
self.opman1.checkpoint = self.opman2.checkpoint = None
cursor1, cursor_len1 = self.opman1.init_cursor()
cursor2, cursor_len2 = self.opman2.init_cursor()
self.assertEqual(entry1[1]["ts"], next(cursor1)["ts"])
self.assertEqual(entry2[1]["ts"], next(cursor2)["ts"])
self.assertEqual(self.opman1.checkpoint, entry1[0]["ts"])
self.assertEqual(self.opman2.checkpoint, entry2[0]["ts"])
with self.opman1.oplog_progress as prog:
self.assertEqual(prog.get_dict()[str(self.opman1.oplog)],
entry1[0]["ts"])
with self.opman2.oplog_progress as prog:
self.assertEqual(prog.get_dict()[str(self.opman2.oplog)],
entry2[0]["ts"])
# Last checkpoint is behind
progress = LockingDict()
progress.get_dict()[str(self.opman1.oplog)] = bson.Timestamp(1, 0)
progress.get_dict()[str(self.opman2.oplog)] = bson.Timestamp(1, 0)
self.opman1.oplog_progress = self.opman2.oplog_progress = progress
self.opman1.checkpoint = self.opman2.checkpoint = None
cursor, cursor_len = self.opman1.init_cursor()
self.assertEqual(cursor_len, 0)
self.assertEqual(cursor, None)
self.assertIsNotNone(self.opman1.checkpoint)
cursor, cursor_len = self.opman2.init_cursor()
self.assertEqual(cursor_len, 0)
self.assertEqual(cursor, None)
self.assertIsNotNone(self.opman2.checkpoint)
def test_init_cursor(self):
"""Test the init_cursor method
Cases:
1. no last checkpoint, no collection dump
2. no last checkpoint, collection dump ok and stuff to dump
3. no last checkpoint, nothing to dump, stuff in oplog
4. no last checkpoint, nothing to dump, nothing in oplog
5. no last checkpoint, no collection dump, stuff in oplog
6. last checkpoint exists
7. last checkpoint is behind
"""
# N.B. these sub-cases build off of each other and cannot be re-ordered
# without side-effects
# No last checkpoint, no collection dump, nothing in oplog
# "change oplog collection" to put nothing in oplog
self.opman.oplog = self.primary_conn["test"]["emptycollection"]
self.opman.collection_dump = False
self.assertTrue(all(doc["op"] == "n" for doc in self.opman.init_cursor()[0]))
self.assertEqual(self.opman.checkpoint, None)
# No last checkpoint, empty collections, nothing in oplog
self.opman.collection_dump = True
cursor, cursor_len = self.opman.init_cursor()
self.assertEqual(cursor, None)
self.assertEqual(cursor_len, 0)
self.assertEqual(self.opman.checkpoint, None)
# No last checkpoint, empty collections, something in oplog
self.opman.oplog = self.primary_conn["local"]["oplog.rs"]
collection = self.primary_conn["test"]["test"]
collection.insert({"i": 1})
collection.remove({"i": 1})
time.sleep(3)
last_ts = self.opman.get_last_oplog_timestamp()
cursor, cursor_len = self.opman.init_cursor()
self.assertEqual(cursor_len, 0)
self.assertEqual(self.opman.checkpoint, last_ts)
with self.opman.oplog_progress as prog:
self.assertEqual(prog.get_dict()[str(self.opman.oplog)], last_ts)
# No last checkpoint, no collection dump, something in oplog
self.opman.oplog_progress = LockingDict()
self.opman.collection_dump = False
collection.insert({"i": 2})
last_ts = self.opman.get_last_oplog_timestamp()
cursor, cursor_len = self.opman.init_cursor()
for i in range(cursor_len - 1):
next(cursor)
self.assertEqual(next(cursor)["o"]["i"], 2)
self.assertEqual(self.opman.checkpoint, last_ts)
# Last checkpoint exists
progress = LockingDict()
self.opman.oplog_progress = progress
for i in range(1000):
collection.insert({"i": i + 500})
entry = list(self.primary_conn["local"]["oplog.rs"].find(skip=200, limit=2))
progress.get_dict()[str(self.opman.oplog)] = entry[0]["ts"]
self.opman.oplog_progress = progress
self.opman.checkpoint = None
cursor, cursor_len = self.opman.init_cursor()
self.assertEqual(next(cursor)["ts"], entry[1]["ts"])
self.assertEqual(self.opman.checkpoint, entry[0]["ts"])
with self.opman.oplog_progress as prog:
self.assertEqual(prog.get_dict()[str(self.opman.oplog)], entry[0]["ts"])
# Last checkpoint is behind
progress = LockingDict()
progress.get_dict()[str(self.opman.oplog)] = bson.Timestamp(1, 0)
self.opman.oplog_progress = progress
self.opman.checkpoint = None
cursor, cursor_len = self.opman.init_cursor()
self.assertEqual(cursor_len, 0)
self.assertEqual(cursor, None)
self.assertIsNotNone(self.opman.checkpoint)
def test_init_cursor(self):
"""Test the init_cursor method
Cases:
1. no last checkpoint, no collection dump
2. no last checkpoint, collection dump ok and stuff to dump
3. no last checkpoint, nothing to dump, stuff in oplog
4. no last checkpoint, nothing to dump, nothing in oplog
5. no last checkpoint, no collection dump, stuff in oplog
6. last checkpoint exists
7. last checkpoint is behind
"""
# N.B. these sub-cases build off of each other and cannot be re-ordered
# without side-effects
self.reset_opman(["includedb1.*", "includedb2.includecol1"], [], {})
# No last checkpoint, no collection dump, nothing in oplog
# "change oplog collection" to put nothing in oplog
self.opman.oplog = self.primary_conn["includedb1"]["emptycollection"]
self.opman.collection_dump = False
self.assertTrue(
all(doc['op'] == 'n' for doc in self.opman.init_cursor()[0]))
self.assertEqual(self.opman.checkpoint, None)
# No last checkpoint, empty collections, nothing in oplog
self.opman.collection_dump = True
cursor, cursor_empty = self.opman.init_cursor()
self.assertEqual(cursor, None)
self.assertTrue(cursor_empty)
self.assertEqual(self.opman.checkpoint, None)
# No last checkpoint, empty collections, something in oplog
self.opman.oplog = self.primary_conn['local']['oplog.rs']
collection = self.primary_conn["includedb1"]["includecol1"]
collection.insert_one({"idb1col1": 1})
collection.delete_one({"idb1col1": 1})
time.sleep(3)
last_ts = self.opman.get_last_oplog_timestamp()
cursor, cursor_empty = self.opman.init_cursor()
self.assertFalse(cursor_empty)
self.assertEqual(self.opman.checkpoint, last_ts)
self.assertEqual(self.opman.read_last_checkpoint(), last_ts)
# No last checkpoint, no collection dump, something in oplog
# If collection dump is false the checkpoint should not be set
self.opman.checkpoint = None
self.opman.oplog_progress = LockingDict()
self.opman.collection_dump = False
collection.insert_one({"idb1col1": 2})
cursor, cursor_empty = self.opman.init_cursor()
for doc in cursor:
last_doc = doc
self.assertEqual(last_doc['o']['idb1col1'], 2)
self.assertIsNone(self.opman.checkpoint)
# Last checkpoint exists
collection.insert_many([{"idb1col1": i + 500} for i in range(1000)])
entry = list(self.primary_conn["local"]["oplog.rs"].find(skip=200,
limit=-2))
self.opman.update_checkpoint(entry[0]["ts"])
cursor, cursor_empty = self.opman.init_cursor()
self.assertEqual(next(cursor)["ts"], entry[1]["ts"])
self.assertEqual(self.opman.checkpoint, entry[0]["ts"])
self.assertEqual(self.opman.read_last_checkpoint(), entry[0]["ts"])
# Last checkpoint is behind
self.opman.update_checkpoint(bson.Timestamp(1, 0))
cursor, cursor_empty = self.opman.init_cursor()
self.assertTrue(cursor_empty)
self.assertEqual(cursor, None)
self.assertEqual(self.opman.checkpoint, bson.Timestamp(1, 0))
def __init__(self, address, oplog_checkpoint, target_url, ns_set,
u_key, auth_key, doc_manager=None, auth_username=None):
if doc_manager is not None:
doc_manager = imp.load_source('DocManager', doc_manager)
else:
from mongo_connector.doc_manager import DocManager
time.sleep(1)
super(Connector, self).__init__()
#can_run is set to false when we join the thread
self.can_run = True
#The name of the file that stores the progress of the OplogThreads
self.oplog_checkpoint = oplog_checkpoint
#main address - either mongos for sharded setups or a primary otherwise
self.address = address
#The URL of the target system
self.target_url = target_url
#The set of relevant namespaces to consider
self.ns_set = ns_set
#The key that is a unique document identifier for the target system.
#Not necessarily the mongo unique key.
self.u_key = u_key
#Password for authentication
self.auth_key = auth_key
#Username for authentication
self.auth_username = auth_username
#The set of OplogThreads created
self.shard_set = {}
#Dict of OplogThread/timestamp pairs to record progress
self.oplog_progress = LockingDict()
try:
if target_url is None:
if doc_manager is None: # imported using from... import
self.doc_manager = DocManager(unique_key=u_key)
else: # imported using load source
self.doc_manager = doc_manager.DocManager(unique_key=u_key)
else:
if doc_manager is None:
self.doc_manager = DocManager(self.target_url,
unique_key=u_key)
else:
self.doc_manager = doc_manager.DocManager(self.target_url,
unique_key=u_key)
except errors.ConnectionFailed:
err_msg = "MongoConnector: Could not connect to target system"
logging.critical(err_msg)
self.can_run = False
return
if self.oplog_checkpoint is not None:
if not os.path.exists(self.oplog_checkpoint):
info_str = ("MongoConnector: Can't find %s, "
"attempting to create an empty progress log" %
self.oplog_checkpoint)
logging.info(info_str)
try:
# Create oplog progress file
open(self.oplog_checkpoint, "w").close()
except IOError as e:
logging.critical("MongoConnector: Could not "
"create a progress log: %s" %
str(e))
sys.exit(1)
else:
if (not os.access(self.oplog_checkpoint, os.W_OK)
and not os.access(self.oplog_checkpoint, os.R_OK )):
logging.critical("Invalid permissions on %s! Exiting" %
(self.oplog_checkpoint))
sys.exit(1)
def test_init_cursor(self):
"""Test the init_cursor method
Cases:
1. no last checkpoint, no collection dump
2. no last checkpoint, collection dump ok and stuff to dump
3. no last checkpoint, nothing to dump, stuff in oplog
4. no last checkpoint, nothing to dump, nothing in oplog
5. no last checkpoint, no collection dump, stuff in oplog
6. last checkpoint exists
7. last checkpoint is behind
"""
# N.B. these sub-cases build off of each other and cannot be re-ordered
# without side-effects
# No last checkpoint, no collection dump, nothing in oplog
# "change oplog collection" to put nothing in oplog
self.opman.oplog = self.primary_conn["test"]["emptycollection"]
self.opman.collection_dump = False
self.assertTrue(
all(doc['op'] == 'n' for doc in self.opman.init_cursor()[0]))
self.assertEqual(self.opman.checkpoint, None)
# No last checkpoint, empty collections, nothing in oplog
self.opman.collection_dump = True
cursor, cursor_len = self.opman.init_cursor()
self.assertEqual(cursor, None)
self.assertEqual(cursor_len, 0)
self.assertEqual(self.opman.checkpoint, None)
# No last checkpoint, empty collections, something in oplog
self.opman.oplog = self.primary_conn['local']['oplog.rs']
collection = self.primary_conn["test"]["test"]
collection.insert_one({"i": 1})
collection.delete_one({"i": 1})
time.sleep(3)
last_ts = self.opman.get_last_oplog_timestamp()
cursor, cursor_len = self.opman.init_cursor()
self.assertEqual(cursor_len, 0)
self.assertEqual(self.opman.checkpoint, last_ts)
with self.opman.oplog_progress as prog:
self.assertEqual(prog.get_dict()[str(self.opman.oplog)], last_ts)
# No last checkpoint, no collection dump, something in oplog
self.opman.oplog_progress = LockingDict()
self.opman.collection_dump = False
collection.insert_one({"i": 2})
last_ts = self.opman.get_last_oplog_timestamp()
cursor, cursor_len = self.opman.init_cursor()
for i in range(cursor_len - 1):
next(cursor)
self.assertEqual(next(cursor)['o']['i'], 2)
self.assertEqual(self.opman.checkpoint, last_ts)
# Last checkpoint exists
progress = LockingDict()
self.opman.oplog_progress = progress
for i in range(1000):
collection.insert_one({"i": i + 500})
entry = list(self.primary_conn["local"]["oplog.rs"].find(skip=200,
limit=-2))
progress.get_dict()[str(self.opman.oplog)] = entry[0]["ts"]
self.opman.oplog_progress = progress
self.opman.checkpoint = None
cursor, cursor_len = self.opman.init_cursor()
self.assertEqual(next(cursor)["ts"], entry[1]["ts"])
self.assertEqual(self.opman.checkpoint, entry[0]["ts"])
with self.opman.oplog_progress as prog:
self.assertEqual(prog.get_dict()[str(self.opman.oplog)],
entry[0]["ts"])
# Last checkpoint is behind
progress = LockingDict()
progress.get_dict()[str(self.opman.oplog)] = bson.Timestamp(1, 0)
self.opman.oplog_progress = progress
self.opman.checkpoint = None
cursor, cursor_len = self.opman.init_cursor()
self.assertEqual(cursor_len, 0)
self.assertEqual(cursor, None)
self.assertIsNotNone(self.opman.checkpoint)
def setUp(self):
""" Initialize the cluster:
Clean out the databases used by the tests
Make connections to mongos, mongods
Create and shard test collections
Create OplogThreads
"""
self.cluster = ShardedCluster().start()
# Connection to mongos
self.mongos_conn = self.cluster.client()
# Connections to the shards
self.shard1_conn = self.cluster.shards[0].client()
self.shard2_conn = self.cluster.shards[1].client()
self.shard1_secondary_conn = self.cluster.shards[0].secondary.client(
readPreference=ReadPreference.SECONDARY_PREFERRED)
self.shard2_secondary_conn = self.cluster.shards[1].secondary.client(
readPreference=ReadPreference.SECONDARY_PREFERRED)
# Wipe any test data
self.mongos_conn["test"]["mcsharded"].drop()
# Create and shard the collection test.mcsharded on the "i" field
self.mongos_conn["test"]["mcsharded"].ensure_index("i")
self.mongos_conn.admin.command("enableSharding", "test")
self.mongos_conn.admin.command("shardCollection",
"test.mcsharded",
key={"i": 1})
# Pre-split the collection so that:
# i < 1000 lives on shard1
# i >= 1000 lives on shard2
self.mongos_conn.admin.command(
bson.SON([("split", "test.mcsharded"), ("middle", {
"i": 1000
})]))
# disable the balancer
self.mongos_conn.config.settings.update({"_id": "balancer"},
{"$set": {
"stopped": True
}},
upsert=True)
# Move chunks to their proper places
try:
self.mongos_conn["admin"].command("moveChunk",
"test.mcsharded",
find={"i": 1},
to='demo-set-0')
except pymongo.errors.OperationFailure:
pass
try:
self.mongos_conn["admin"].command("moveChunk",
"test.mcsharded",
find={"i": 1000},
to='demo-set-1')
except pymongo.errors.OperationFailure:
pass
# Make sure chunks are distributed correctly
self.mongos_conn["test"]["mcsharded"].insert({"i": 1})
self.mongos_conn["test"]["mcsharded"].insert({"i": 1000})
def chunks_moved():
doc1 = self.shard1_conn.test.mcsharded.find_one()
doc2 = self.shard2_conn.test.mcsharded.find_one()
if None in (doc1, doc2):
return False
return doc1['i'] == 1 and doc2['i'] == 1000
assert_soon(chunks_moved,
max_tries=120,
message='chunks not moved? doc1=%r, doc2=%r' %
(self.shard1_conn.test.mcsharded.find_one(),
self.shard2_conn.test.mcsharded.find_one()))
self.mongos_conn.test.mcsharded.remove()
# create a new oplog progress file
try:
os.unlink("oplog.timestamp")
except OSError:
pass
open("oplog.timestamp", "w").close()
# Oplog threads (oplog manager) for each shard
doc_manager = DocManager()
oplog_progress = LockingDict()
self.opman1 = OplogThread(
primary_client=self.shard1_conn,
doc_managers=(doc_manager, ),
oplog_progress_dict=oplog_progress,
namespace_set=["test.mcsharded", "test.mcunsharded"],
mongos_client=self.mongos_conn)
self.opman2 = OplogThread(
primary_client=self.shard2_conn,
doc_managers=(doc_manager, ),
oplog_progress_dict=oplog_progress,
namespace_set=["test.mcsharded", "test.mcunsharded"],
mongos_client=self.mongos_conn)
def setUp(self):
""" Initialize the cluster:
Clean out the databases used by the tests
Make connections to mongos, mongods
Create and shard test collections
Create OplogThreads
"""
# Start the cluster with a mongos on port 27217
self.mongos_p = start_cluster()
# Connection to mongos
mongos_address = '%s:%d' % (mongo_host, self.mongos_p)
self.mongos_conn = MongoClient(mongos_address)
# Connections to the shards
shard1_ports = get_shard(self.mongos_p, 0)
shard2_ports = get_shard(self.mongos_p, 1)
self.shard1_prim_p = shard1_ports['primary']
self.shard1_scnd_p = shard1_ports['secondaries'][0]
self.shard2_prim_p = shard2_ports['primary']
self.shard2_scnd_p = shard2_ports['secondaries'][0]
self.shard1_conn = MongoClient('%s:%d'
% (mongo_host, self.shard1_prim_p),
replicaSet="demo-set-0")
self.shard2_conn = MongoClient('%s:%d'
% (mongo_host, self.shard2_prim_p),
replicaSet="demo-set-1")
self.shard1_secondary_conn = MongoClient(
'%s:%d' % (mongo_host, self.shard1_scnd_p),
read_preference=ReadPreference.SECONDARY_PREFERRED
)
self.shard2_secondary_conn = MongoClient(
'%s:%d' % (mongo_host, self.shard2_scnd_p),
read_preference=ReadPreference.SECONDARY_PREFERRED
)
# Wipe any test data
self.mongos_conn["test"]["mcsharded"].drop()
# Create and shard the collection test.mcsharded on the "i" field
self.mongos_conn["test"]["mcsharded"].ensure_index("i")
self.mongos_conn.admin.command("enableSharding", "test")
self.mongos_conn.admin.command("shardCollection",
"test.mcsharded",
key={"i": 1})
# Pre-split the collection so that:
# i < 1000 lives on shard1
# i >= 1000 lives on shard2
self.mongos_conn.admin.command(bson.SON([
("split", "test.mcsharded"),
("middle", {"i": 1000})
]))
# disable the balancer
self.mongos_conn.config.settings.update(
{"_id": "balancer"},
{"$set": {"stopped": True}},
upsert=True
)
# Move chunks to their proper places
try:
self.mongos_conn["admin"].command(
"moveChunk",
"test.mcsharded",
find={"i": 1},
to="demo-set-0"
)
except pymongo.errors.OperationFailure:
pass # chunk may already be on the correct shard
try:
self.mongos_conn["admin"].command(
"moveChunk",
"test.mcsharded",
find={"i": 1000},
to="demo-set-1"
)
except pymongo.errors.OperationFailure:
pass # chunk may already be on the correct shard
# Make sure chunks are distributed correctly
self.mongos_conn["test"]["mcsharded"].insert({"i": 1})
self.mongos_conn["test"]["mcsharded"].insert({"i": 1000})
def chunks_moved():
doc1 = self.shard1_conn.test.mcsharded.find_one()
doc2 = self.shard2_conn.test.mcsharded.find_one()
if None in (doc1, doc2):
return False
return doc1['i'] == 1 and doc2['i'] == 1000
assert_soon(chunks_moved)
self.mongos_conn.test.mcsharded.remove()
# create a new oplog progress file
try:
os.unlink("config.txt")
except OSError:
pass
open("config.txt", "w").close()
# Oplog threads (oplog manager) for each shard
doc_manager = DocManager()
oplog_progress = LockingDict()
self.opman1 = OplogThread(
primary_conn=self.shard1_conn,
main_address='%s:%d' % (mongo_host, self.mongos_p),
oplog_coll=self.shard1_conn["local"]["oplog.rs"],
is_sharded=True,
doc_manager=doc_manager,
oplog_progress_dict=oplog_progress,
namespace_set=["test.mcsharded", "test.mcunsharded"],
auth_key=None,
auth_username=None
)
self.opman2 = OplogThread(
primary_conn=self.shard2_conn,
main_address='%s:%d' % (mongo_host, self.mongos_p),
oplog_coll=self.shard2_conn["local"]["oplog.rs"],
is_sharded=True,
doc_manager=doc_manager,
oplog_progress_dict=oplog_progress,
namespace_set=["test.mcsharded", "test.mcunsharded"],
auth_key=None,
auth_username=None
)
class Connector(threading.Thread):
"""Checks the cluster for shards to tail.
"""
def __init__(self, address, oplog_checkpoint, target_url, ns_set,
u_key, auth_key, doc_manager=None, auth_username=None,
collection_dump=True, batch_size=constants.DEFAULT_BATCH_SIZE,
fields=None, dest_mapping={},
auto_commit_interval=constants.DEFAULT_COMMIT_INTERVAL,
continue_on_error=False):
if target_url and not doc_manager:
raise errors.ConnectorError("Cannot create a Connector with a "
"target URL but no doc manager!")
def is_string(s):
try:
return isinstance(s, basestring)
except NameError:
return isinstance(s, str)
def load_doc_manager(path):
name, _ = os.path.splitext(os.path.basename(path))
try:
import importlib.machinery
loader = importlib.machinery.SourceFileLoader(name, path)
module = loader.load_module(name)
except ImportError:
module = imp.load_source(name, path)
return module
doc_manager_modules = None
if doc_manager is not None:
# backwards compatilibity: doc_manager may be a string
if is_string(doc_manager):
doc_manager_modules = [load_doc_manager(doc_manager)]
# doc_manager is a list
else:
doc_manager_modules = []
for dm in doc_manager:
doc_manager_modules.append(load_doc_manager(dm))
super(Connector, self).__init__()
#can_run is set to false when we join the thread
self.can_run = True
#The name of the file that stores the progress of the OplogThreads
self.oplog_checkpoint = oplog_checkpoint
#main address - either mongos for sharded setups or a primary otherwise
self.address = address
#The URLs of each target system, respectively
if is_string(target_url):
self.target_urls = [target_url]
elif target_url:
self.target_urls = list(target_url)
else:
self.target_urls = None
#The set of relevant namespaces to consider
self.ns_set = ns_set
#The dict of source namespace to destination namespace
self.dest_mapping = dest_mapping
#Whether the collection dump gracefully handles exceptions
self.continue_on_error = continue_on_error
#The key that is a unique document identifier for the target system.
#Not necessarily the mongo unique key.
self.u_key = u_key
#Password for authentication
self.auth_key = auth_key
#Username for authentication
self.auth_username = auth_username
#The set of OplogThreads created
self.shard_set = {}
#Boolean chooses whether to dump the entire collection if no timestamp
# is present in the config file
self.collection_dump = collection_dump
#Num entries to process before updating config file with current pos
self.batch_size = batch_size
#Dict of OplogThread/timestamp pairs to record progress
self.oplog_progress = LockingDict()
# List of fields to export
self.fields = fields
try:
docman_kwargs = {"unique_key": u_key,
"namespace_set": ns_set,
"auto_commit_interval": auto_commit_interval}
# No doc managers specified, using simulator
if doc_manager is None:
self.doc_managers = [simulator.DocManager(**docman_kwargs)]
else:
self.doc_managers = []
for i, d in enumerate(doc_manager_modules):
# self.target_urls may be shorter than
# self.doc_managers, or left as None
if self.target_urls and i < len(self.target_urls):
target_url = self.target_urls[i]
else:
target_url = None
if target_url:
self.doc_managers.append(
d.DocManager(self.target_urls[i],
**docman_kwargs))
else:
self.doc_managers.append(
d.DocManager(**docman_kwargs))
# If more target URLs were given than doc managers, may need
# to create additional doc managers
for url in self.target_urls[i + 1:]:
self.doc_managers.append(
doc_manager_modules[-1].DocManager(url,
**docman_kwargs))
except errors.ConnectionFailed:
err_msg = "MongoConnector: Could not connect to target system"
logging.critical(err_msg)
self.can_run = False
return
if self.oplog_checkpoint is not None:
if not os.path.exists(self.oplog_checkpoint):
info_str = ("MongoConnector: Can't find %s, "
"attempting to create an empty progress log" %
self.oplog_checkpoint)
logging.info(info_str)
try:
# Create oplog progress file
open(self.oplog_checkpoint, "w").close()
except IOError as e:
logging.critical("MongoConnector: Could not "
"create a progress log: %s" %
str(e))
sys.exit(2)
else:
if (not os.access(self.oplog_checkpoint, os.W_OK)
and not os.access(self.oplog_checkpoint, os.R_OK)):
logging.critical("Invalid permissions on %s! Exiting" %
(self.oplog_checkpoint))
sys.exit(2)
def join(self):
""" Joins thread, stops it from running
"""
self.can_run = False
for dm in self.doc_managers:
dm.stop()
threading.Thread.join(self)
def write_oplog_progress(self):
""" Writes oplog progress to file provided by user
"""
if self.oplog_checkpoint is None:
return None
# write to temp file
backup_file = self.oplog_checkpoint + '.backup'
os.rename(self.oplog_checkpoint, backup_file)
# for each of the threads write to file
with open(self.oplog_checkpoint, 'w') as dest:
with self.oplog_progress as oplog_prog:
oplog_dict = oplog_prog.get_dict()
for oplog, time_stamp in oplog_dict.items():
oplog_str = str(oplog)
timestamp = util.bson_ts_to_long(time_stamp)
json_str = json.dumps([oplog_str, timestamp])
try:
dest.write(json_str)
except IOError:
# Basically wipe the file, copy from backup
dest.truncate()
with open(backup_file, 'r') as backup:
shutil.copyfile(backup, dest)
break
os.remove(self.oplog_checkpoint + '.backup')
def read_oplog_progress(self):
"""Reads oplog progress from file provided by user.
This method is only called once before any threads are spanwed.
"""
if self.oplog_checkpoint is None:
return None
# Check for empty file
try:
if os.stat(self.oplog_checkpoint).st_size == 0:
logging.info("MongoConnector: Empty oplog progress file.")
return None
except OSError:
return None
source = open(self.oplog_checkpoint, 'r')
try:
data = json.load(source)
except ValueError: # empty file
reason = "It may be empty or corrupt."
logging.info("MongoConnector: Can't read oplog progress file. %s" %
(reason))
source.close()
return None
source.close()
count = 0
oplog_dict = self.oplog_progress.get_dict()
for count in range(0, len(data), 2):
oplog_str = data[count]
time_stamp = data[count + 1]
oplog_dict[oplog_str] = util.long_to_bson_ts(time_stamp)
#stored as bson_ts
def run(self):
"""Discovers the mongo cluster and creates a thread for each primary.
"""
main_conn = MongoClient(self.address)
if self.auth_key is not None:
main_conn['admin'].authenticate(self.auth_username, self.auth_key)
self.read_oplog_progress()
conn_type = None
try:
main_conn.admin.command("isdbgrid")
except pymongo.errors.OperationFailure:
conn_type = "REPLSET"
if conn_type == "REPLSET":
# Make sure we are connected to a replica set
is_master = main_conn.admin.command("isMaster")
if not "setName" in is_master:
logging.error(
'No replica set at "%s"! A replica set is required '
'to run mongo-connector. Shutting down...' % self.address
)
return
# Establish a connection to the replica set as a whole
main_conn.disconnect()
main_conn = MongoClient(self.address,
replicaSet=is_master['setName'])
if self.auth_key is not None:
main_conn.admin.authenticate(self.auth_username, self.auth_key)
#non sharded configuration
oplog_coll = main_conn['local']['oplog.rs']
oplog = OplogThread(
primary_conn=main_conn,
main_address=self.address,
oplog_coll=oplog_coll,
is_sharded=False,
doc_manager=self.doc_managers,
oplog_progress_dict=self.oplog_progress,
namespace_set=self.ns_set,
auth_key=self.auth_key,
auth_username=self.auth_username,
repl_set=is_master['setName'],
collection_dump=self.collection_dump,
batch_size=self.batch_size,
fields=self.fields,
dest_mapping=self.dest_mapping,
continue_on_error=self.continue_on_error
)
self.shard_set[0] = oplog
logging.info('MongoConnector: Starting connection thread %s' %
main_conn)
oplog.start()
while self.can_run:
if not self.shard_set[0].running:
logging.error("MongoConnector: OplogThread"
" %s unexpectedly stopped! Shutting down" %
(str(self.shard_set[0])))
self.oplog_thread_join()
for dm in self.doc_managers:
dm.stop()
return
self.write_oplog_progress()
time.sleep(1)
else: # sharded cluster
while self.can_run is True:
for shard_doc in main_conn['config']['shards'].find():
shard_id = shard_doc['_id']
if shard_id in self.shard_set:
if not self.shard_set[shard_id].running:
logging.error("MongoConnector: OplogThread "
"%s unexpectedly stopped! Shutting "
"down" %
(str(self.shard_set[shard_id])))
self.oplog_thread_join()
for dm in self.doc_managers:
dm.stop()
return
self.write_oplog_progress()
time.sleep(1)
continue
try:
repl_set, hosts = shard_doc['host'].split('/')
except ValueError:
cause = "The system only uses replica sets!"
logging.error("MongoConnector: %s", cause)
self.oplog_thread_join()
for dm in self.doc_managers:
dm.stop()
return
shard_conn = MongoClient(hosts, replicaSet=repl_set)
oplog_coll = shard_conn['local']['oplog.rs']
oplog = OplogThread(
primary_conn=shard_conn,
main_address=self.address,
oplog_coll=oplog_coll,
is_sharded=True,
doc_manager=self.doc_managers,
oplog_progress_dict=self.oplog_progress,
namespace_set=self.ns_set,
auth_key=self.auth_key,
auth_username=self.auth_username,
collection_dump=self.collection_dump,
batch_size=self.batch_size,
fields=self.fields,
dest_mapping=self.dest_mapping,
continue_on_error=self.continue_on_error
)
self.shard_set[shard_id] = oplog
msg = "Starting connection thread"
logging.info("MongoConnector: %s %s" % (msg, shard_conn))
oplog.start()
self.oplog_thread_join()
self.write_oplog_progress()
def oplog_thread_join(self):
"""Stops all the OplogThreads
"""
logging.info('MongoConnector: Stopping all OplogThreads')
for thread in self.shard_set.values():
thread.join()
