def test_auth_during_failover(self, done):
loop = IOLoop.instance()
c = motor.MotorReplicaSetClient(self.seed, replicaSet=self.name)
c.open_sync()
db = c.pymongo_ha_auth
res = yield motor.Op(db.authenticate, 'user', 'userpass')
self.assertTrue(res)
yield motor.Op(db.foo.insert,
{'foo': 'bar'},
w=3, wtimeout=1000)
yield motor.Op(db.logout)
yield AssertRaises(OperationFailure, db.foo.find_one)
primary = '%s:%d' % self.c.primary
ha_tools.kill_members([primary], 2)
# Let monitor notice primary's gone
yield gen.Task(loop.add_timeout, time.time() + 2 * MONITOR_INTERVAL)
# Make sure we can still authenticate
res = yield motor.Op(db.authenticate, 'user', 'userpass')
self.assertTrue(res)
# And still query.
db.read_preference = PRIMARY_PREFERRED
res = yield motor.Op(db.foo.find_one)
self.assertEqual('bar', res['foo'])
c.close()
done()
def test_alive(self, done):
primary = ha_tools.get_primary()
secondary = ha_tools.get_random_secondary()
primary_cx = motor.MotorClient(primary).open_sync()
secondary_cx = motor.MotorClient(secondary).open_sync()
rsc = motor.MotorReplicaSetClient(
self.seed, replicaSet=self.name).open_sync()
loop = IOLoop.instance()
try:
yield AssertTrue(primary_cx.alive)
yield AssertTrue(secondary_cx.alive)
yield AssertTrue(rsc.alive)
ha_tools.kill_primary()
yield gen.Task(loop.add_timeout, time.time() + 0.5)
yield AssertFalse(primary_cx.alive)
yield AssertTrue(secondary_cx.alive)
# Sometimes KeyError: https://jira.mongodb.org/browse/PYTHON-467
yield AssertFalse(rsc.alive)
ha_tools.kill_members([secondary], 2)
yield gen.Task(loop.add_timeout, time.time() + 0.5)
yield AssertFalse(primary_cx.alive)
yield AssertFalse(secondary_cx.alive)
yield AssertFalse(rsc.alive)
finally:
rsc.close()
done()
def test_passive_and_hidden(self):
self.c = ReplicaSetConnection(
self.seed, replicaSet=self.name, use_greenlets=use_greenlets)
db = self.c.pymongo_test
w = len(self.c.secondaries) + 1
db.test.remove({}, safe=True, w=w)
db.test.insert({'foo': 'bar'}, safe=True, w=w)
passives = ha_tools.get_passives()
passives = [_partition_node(member) for member in passives]
hidden = ha_tools.get_hidden_members()
hidden = [_partition_node(member) for member in hidden]
self.assertEqual(self.c.secondaries, set(passives))
for mode in (
ReadPreference.SECONDARY, ReadPreference.SECONDARY_PREFERRED
):
db.read_preference = mode
for _ in xrange(10):
cursor = db.test.find()
cursor.next()
self.assertTrue(cursor._Cursor__connection_id in passives)
self.assertTrue(cursor._Cursor__connection_id not in hidden)
ha_tools.kill_members(ha_tools.get_passives(), 2)
sleep(2 * MONITOR_INTERVAL)
db.read_preference = ReadPreference.SECONDARY_PREFERRED
for _ in xrange(10):
cursor = db.test.find()
cursor.next()
self.assertEqual(cursor._Cursor__connection_id, self.c.primary)
def test_alive(self):
primary = ha_tools.get_primary()
secondary = ha_tools.get_random_secondary()
primary_cx = yield motor.MotorClient(primary).open()
secondary_cx = yield motor.MotorClient(secondary).open()
rsc = motor.MotorReplicaSetClient(self.seed, replicaSet=self.name)
yield rsc.open()
try:
self.assertTrue((yield primary_cx.alive()))
self.assertTrue((yield secondary_cx.alive()))
self.assertTrue((yield rsc.alive()))
ha_tools.kill_primary()
yield self.pause(0.5)
self.assertFalse((yield primary_cx.alive()))
self.assertTrue((yield secondary_cx.alive()))
self.assertFalse((yield rsc.alive()))
ha_tools.kill_members([secondary], 2)
yield self.pause(0.5)
self.assertFalse((yield primary_cx.alive()))
self.assertFalse((yield secondary_cx.alive()))
self.assertFalse((yield rsc.alive()))
finally:
rsc.close()
def test_alive(self):
primary = ha_tools.get_primary()
secondary = ha_tools.get_random_secondary()
primary_cx = MongoClient(primary, use_greenlets=use_greenlets)
secondary_cx = MongoClient(secondary, use_greenlets=use_greenlets)
rsc = MongoReplicaSetClient(self.seed,
replicaSet=self.name,
use_greenlets=use_greenlets)
try:
self.assertTrue(primary_cx.alive())
self.assertTrue(secondary_cx.alive())
self.assertTrue(rsc.alive())
ha_tools.kill_primary()
time.sleep(0.5)
self.assertFalse(primary_cx.alive())
self.assertTrue(secondary_cx.alive())
self.assertFalse(rsc.alive())
ha_tools.kill_members([secondary], 2)
time.sleep(0.5)
self.assertFalse(primary_cx.alive())
self.assertFalse(secondary_cx.alive())
self.assertFalse(rsc.alive())
finally:
rsc.close()
def test_auth_during_failover(self):
c = motor.MotorReplicaSetClient(self.seed, replicaSet=self.name)
yield c.open()
db = c.pymongo_ha_auth
res = yield db.authenticate('user', 'userpass')
self.assertTrue(res)
yield db.foo.insert({'foo': 'bar'}, w=3, wtimeout=1000)
yield db.logout()
with assert_raises(OperationFailure):
yield db.foo.find_one()
primary = '%s:%d' % self.c.primary
ha_tools.kill_members([primary], 2)
# Let monitor notice primary's gone
yield self.pause(2 * MONITOR_INTERVAL)
# Make sure we can still authenticate
res = yield db.authenticate('user', 'userpass')
self.assertTrue(res)
# And still query.
db.read_preference = PRIMARY_PREFERRED
res = yield db.foo.find_one()
self.assertEqual('bar', res['foo'])
c.close()
def test_alive(self):
primary = ha_tools.get_primary()
secondary = ha_tools.get_random_secondary()
primary_cx = connected(
MongoClient(
primary,
serverSelectionTimeoutMS=self.server_selection_timeout)),
secondary_cx = connected(
MongoClient(
secondary,
serverSelectionTimeoutMS=self.server_selection_timeout))
rsc = connected(
MongoClient(
self.seed,
replicaSet=self.name,
serverSelectionTimeoutMS=self.server_selection_timeout))
self.assertTrue(primary_cx.alive())
self.assertTrue(secondary_cx.alive())
self.assertTrue(rsc.alive())
ha_tools.kill_primary()
time.sleep(0.5)
self.assertFalse(primary_cx.alive())
self.assertTrue(secondary_cx.alive())
self.assertFalse(rsc.alive())
ha_tools.kill_members([secondary], 2)
time.sleep(0.5)
self.assertFalse(primary_cx.alive())
self.assertFalse(secondary_cx.alive())
self.assertFalse(rsc.alive())
def test_alive(self):
primary = ha_tools.get_primary()
secondary = ha_tools.get_random_secondary()
primary_cx = yield motor.MotorClient(primary).open()
secondary_cx = yield motor.MotorClient(secondary).open()
rsc = motor.MotorReplicaSetClient(self.seed, replicaSet=self.name)
yield rsc.open()
try:
self.assertTrue((yield primary_cx.alive()))
self.assertTrue((yield secondary_cx.alive()))
self.assertTrue((yield rsc.alive()))
ha_tools.kill_primary()
yield self.pause(0.5)
self.assertFalse((yield primary_cx.alive()))
self.assertTrue((yield secondary_cx.alive()))
self.assertFalse((yield rsc.alive()))
ha_tools.kill_members([secondary], 2)
yield self.pause(0.5)
self.assertFalse((yield primary_cx.alive()))
self.assertFalse((yield secondary_cx.alive()))
self.assertFalse((yield rsc.alive()))
finally:
rsc.close()
def test_auth_during_failover(self):
c = motor.MotorReplicaSetClient(self.seed, replicaSet=self.name)
yield c.open()
db = c.pymongo_ha_auth
res = yield db.authenticate('user', 'userpass')
self.assertTrue(res)
yield db.foo.insert({'foo': 'bar'}, w=3, wtimeout=1000)
yield db.logout()
with assert_raises(OperationFailure):
yield db.foo.find_one()
primary = '%s:%d' % self.c.primary
ha_tools.kill_members([primary], 2)
# Let monitor notice primary's gone
yield self.pause(2 * MONITOR_INTERVAL)
# Make sure we can still authenticate
res = yield db.authenticate('user', 'userpass')
self.assertTrue(res)
# And still query.
db.read_preference = PRIMARY_PREFERRED
res = yield db.foo.find_one()
self.assertEqual('bar', res['foo'])
c.close()
def test_passive_and_hidden(self):
self.c = ReplicaSetConnection(self.seed,
replicaSet=self.name,
use_greenlets=use_greenlets)
db = self.c.pymongo_test
w = len(self.c.secondaries) + 1
db.test.remove({}, safe=True, w=w)
db.test.insert({'foo': 'bar'}, safe=True, w=w)
passives = ha_tools.get_passives()
passives = [_partition_node(member) for member in passives]
hidden = ha_tools.get_hidden_members()
hidden = [_partition_node(member) for member in hidden]
self.assertEqual(self.c.secondaries, set(passives))
for mode in (ReadPreference.SECONDARY,
ReadPreference.SECONDARY_PREFERRED):
db.read_preference = mode
for _ in xrange(10):
cursor = db.test.find()
cursor.next()
self.assertTrue(cursor._Cursor__connection_id in passives)
self.assertTrue(cursor._Cursor__connection_id not in hidden)
ha_tools.kill_members(ha_tools.get_passives(), 2)
sleep(2 * MONITOR_INTERVAL)
db.read_preference = ReadPreference.SECONDARY_PREFERRED
for _ in xrange(10):
cursor = db.test.find()
cursor.next()
self.assertEqual(cursor._Cursor__connection_id, self.c.primary)
def test_alive(self):
primary = ha_tools.get_primary()
secondary = ha_tools.get_random_secondary()
primary_cx = connected(
MongoClient(
primary,
serverSelectionTimeoutMS=self.server_selection_timeout)),
secondary_cx = connected(
MongoClient(
secondary,
serverSelectionTimeoutMS=self.server_selection_timeout))
rsc = connected(
MongoClient(
self.seed,
replicaSet=self.name,
serverSelectionTimeoutMS=self.server_selection_timeout))
self.assertTrue(primary_cx.alive())
self.assertTrue(secondary_cx.alive())
self.assertTrue(rsc.alive())
ha_tools.kill_primary()
time.sleep(0.5)
self.assertFalse(primary_cx.alive())
self.assertTrue(secondary_cx.alive())
self.assertFalse(rsc.alive())
ha_tools.kill_members([secondary], 2)
time.sleep(0.5)
self.assertFalse(primary_cx.alive())
self.assertFalse(secondary_cx.alive())
self.assertFalse(rsc.alive())
def test_alive(self):
primary = ha_tools.get_primary()
secondary = ha_tools.get_random_secondary()
primary_cx = MongoClient(primary, use_greenlets=use_greenlets)
secondary_cx = MongoClient(secondary, use_greenlets=use_greenlets)
rsc = MongoReplicaSetClient(
self.seed, replicaSet=self.name, use_greenlets=use_greenlets)
try:
self.assertTrue(primary_cx.alive())
self.assertTrue(secondary_cx.alive())
self.assertTrue(rsc.alive())
ha_tools.kill_primary()
time.sleep(0.5)
self.assertFalse(primary_cx.alive())
self.assertTrue(secondary_cx.alive())
self.assertFalse(rsc.alive())
ha_tools.kill_members([secondary], 2)
time.sleep(0.5)
self.assertFalse(primary_cx.alive())
self.assertFalse(secondary_cx.alive())
self.assertFalse(rsc.alive())
finally:
rsc.close()
def test_ship_of_theseus(self):
c = MongoReplicaSetClient(
self.seed, replicaSet=self.name, use_greenlets=use_greenlets)
db = c.pymongo_test
db.test.insert({}, w=len(c.secondaries) + 1)
find_one = db.test.find_one
primary = ha_tools.get_primary()
secondary1 = ha_tools.get_random_secondary()
new_hosts = [ha_tools.add_member() for _ in range(3)]
# Wait for new members to join.
for _ in xrange(120):
if ha_tools.get_primary() and len(ha_tools.get_secondaries()) == 4:
break
sleep(1)
else:
self.fail("New secondaries didn't join")
ha_tools.kill_members([primary, secondary1], 9)
# Wait for primary.
for _ in xrange(30):
if ha_tools.get_primary() and len(ha_tools.get_secondaries()) == 2:
break
sleep(1)
else:
self.fail("No failover")
sleep(2 * MONITOR_INTERVAL)
# No error.
find_one()
find_one(read_preference=SECONDARY)
# All members down.
ha_tools.kill_members(new_hosts, 9)
self.assertRaises(
ConnectionFailure,
find_one, read_preference=SECONDARY)
ha_tools.restart_members(new_hosts)
# Should be able to reconnect to set even though original seed
# list is useless. Use SECONDARY so we don't have to wait for
# the election, merely for the client to detect members are up.
sleep(2 * MONITOR_INTERVAL)
find_one(read_preference=SECONDARY)
def test_passive_and_hidden(self):
self.c = MongoReplicaSetClient(
self.seed, replicaSet=self.name, use_greenlets=use_greenlets)
passives = ha_tools.get_passives()
passives = partition_nodes(passives)
self.assertEqual(self.c.secondaries, set(passives))
for mode in SECONDARY, SECONDARY_PREFERRED:
utils.assertReadFromAll(self, self.c, passives, mode)
ha_tools.kill_members(ha_tools.get_passives(), 2)
sleep(2 * MONITOR_INTERVAL)
utils.assertReadFrom(self, self.c, self.c.primary, SECONDARY_PREFERRED)
def test_passive_and_hidden(self):
self.c = MongoReplicaSetClient(
self.seed, replicaSet=self.name, use_greenlets=use_greenlets)
passives = ha_tools.get_passives()
passives = partition_nodes(passives)
self.assertEqual(self.c.secondaries, set(passives))
for mode in SECONDARY, SECONDARY_PREFERRED:
utils.assertReadFromAll(self, self.c, passives, mode)
ha_tools.kill_members(ha_tools.get_passives(), 2)
sleep(2 * MONITOR_INTERVAL)
utils.assertReadFrom(self, self.c, self.c.primary, SECONDARY_PREFERRED)
def test_ship_of_theseus(self, done):
loop = IOLoop.instance()
c = motor.MotorReplicaSetClient(self.seed, replicaSet=self.name)
c.open_sync()
db = c.pymongo_test
w = len(c.secondaries) + 1
db.test.insert({}, w=w)
primary = ha_tools.get_primary()
secondary1 = ha_tools.get_random_secondary()
ha_tools.add_member()
ha_tools.add_member()
ha_tools.add_member()
# Wait for new members to join
for _ in xrange(120):
if ha_tools.get_primary() and len(ha_tools.get_secondaries()) == 4:
break
yield gen.Task(loop.add_timeout, time.time() + 1)
else:
self.fail("New secondaries didn't join")
ha_tools.kill_members([primary, secondary1], 9)
# Wait for primary
for _ in xrange(30):
if ha_tools.get_primary() and len(ha_tools.get_secondaries()) == 2:
break
yield gen.Task(loop.add_timeout, time.time() + 1)
else:
self.fail("No failover")
# Ensure monitor picks up new members
yield gen.Task(loop.add_timeout, time.time() + 2 * MONITOR_INTERVAL)
try:
yield motor.Op(db.test.find_one)
except AutoReconnect:
# Might take one try to reconnect
yield gen.Task(loop.add_timeout, time.time() + 1)
# No error
yield motor.Op(db.test.find_one)
yield motor.Op(db.test.find_one, read_preference=SECONDARY)
done()
def test_passive_and_hidden(self):
self.c = motor.MotorReplicaSetClient(self.seed, replicaSet=self.name)
yield self.c.open()
passives = ha_tools.get_passives()
passives = [_partition_node(member) for member in passives]
self.assertEqual(self.c.secondaries, set(passives))
for mode in SECONDARY, SECONDARY_PREFERRED:
yield assert_read_from_all(self, self.c, passives, mode)
ha_tools.kill_members(ha_tools.get_passives(), 2)
yield self.pause(2 * MONITOR_INTERVAL)
yield assert_read_from(self, self.c, self.c.primary,
SECONDARY_PREFERRED)
def test_passive_and_hidden(self):
self.c = motor.MotorReplicaSetClient(self.seed, replicaSet=self.name)
yield self.c.open()
passives = ha_tools.get_passives()
passives = [_partition_node(member) for member in passives]
self.assertEqual(self.c.secondaries, set(passives))
for mode in SECONDARY, SECONDARY_PREFERRED:
yield assert_read_from_all(self, self.c, passives, mode)
ha_tools.kill_members(ha_tools.get_passives(), 2)
yield self.pause(2 * MONITOR_INTERVAL)
yield assert_read_from(
self, self.c, self.c.primary, SECONDARY_PREFERRED)
def test_passive_and_hidden(self):
self.c = MongoClient(
self.seed,
replicaSet=self.name,
serverSelectionTimeoutMS=self.server_selection_timeout)
passives = ha_tools.get_passives()
passives = partition_nodes(passives)
self.assertEqual(self.c.secondaries, set(passives))
for mode in SECONDARY, SECONDARY_PREFERRED:
utils.assertReadFromAll(self, self.c, passives, mode)
ha_tools.kill_members(ha_tools.get_passives(), 2)
time.sleep(2 * self.heartbeat_frequency)
utils.assertReadFrom(self, self.c, self.c.primary, SECONDARY_PREFERRED)
def test_passive_and_hidden(self):
self.c = MongoClient(
self.seed,
replicaSet=self.name,
serverSelectionTimeoutMS=self.server_selection_timeout)
passives = ha_tools.get_passives()
passives = partition_nodes(passives)
self.assertEqual(self.c.secondaries, set(passives))
for mode in SECONDARY, SECONDARY_PREFERRED:
utils.assertReadFromAll(self, self.c, passives, mode)
ha_tools.kill_members(ha_tools.get_passives(), 2)
time.sleep(2 * self.heartbeat_frequency)
utils.assertReadFrom(self, self.c, self.c.primary, SECONDARY_PREFERRED)
def test_passive_and_hidden(self):
loop = IOLoop.instance()
self.c = motor.MotorReplicaSetClient(self.seed, replicaSet=self.name)
self.c
passives = ha_tools.get_passives()
passives = [_partition_node(member) for member in passives]
self.assertEqual(self.c.secondaries, set(passives))
for mode in SECONDARY, SECONDARY_PREFERRED:
yield motor.Op(assertReadFromAll, self, self.c, passives, mode)
ha_tools.kill_members(ha_tools.get_passives(), 2)
yield gen.Task(loop.add_timeout, time.time() + 2 * MONITOR_INTERVAL)
yield motor.Op(assertReadFrom,
self, self.c, self.c.primary, SECONDARY_PREFERRED)
def test_auth_during_failover(self):
self.assertTrue(self.db.authenticate("user", "userpass"))
self.assertTrue(self.db.foo.insert({"foo": "bar"}, safe=True, w=3, wtimeout=1000))
self.db.logout()
self.assertRaises(OperationFailure, self.db.foo.find_one)
primary = "%s:%d" % self.c.primary
ha_tools.kill_members([primary], 2)
# Let monitor notice primary's gone
sleep(2 * MONITOR_INTERVAL)
# Make sure we can still authenticate
self.assertTrue(self.db.authenticate("user", "userpass"))
# And still query.
self.db.read_preference = ReadPreference.PRIMARY_PREFERRED
self.assertEqual("bar", self.db.foo.find_one()["foo"])
def test_ship_of_theseus(self):
c = motor.MotorReplicaSetClient(self.seed, replicaSet=self.name)
yield c.open()
db = c.motor_test
w = len(c.secondaries) + 1
db.test.insert({}, w=w)
primary = ha_tools.get_primary()
secondary1 = ha_tools.get_random_secondary()
ha_tools.add_member()
ha_tools.add_member()
ha_tools.add_member()
# Wait for new members to join
for _ in xrange(120):
if ha_tools.get_primary() and len(ha_tools.get_secondaries()) == 4:
break
yield self.pause(1)
else:
self.fail("New secondaries didn't join")
ha_tools.kill_members([primary, secondary1], 9)
# Wait for primary
for _ in xrange(30):
if ha_tools.get_primary() and len(ha_tools.get_secondaries()) == 2:
break
yield self.pause(1)
else:
self.fail("No failover")
# Ensure monitor picks up new members
yield self.pause(2 * MONITOR_INTERVAL)
try:
yield db.test.find_one()
except AutoReconnect:
# Might take one try to reconnect
yield self.pause(1)
# No error
yield db.test.find_one()
yield db.test.find_one(read_preference=SECONDARY)
def test_ship_of_theseus(self):
c = motor.MotorReplicaSetClient(self.seed, replicaSet=self.name)
yield c.open()
db = c.motor_test
w = len(c.secondaries) + 1
db.test.insert({}, w=w)
primary = ha_tools.get_primary()
secondary1 = ha_tools.get_random_secondary()
ha_tools.add_member()
ha_tools.add_member()
ha_tools.add_member()
# Wait for new members to join
for _ in xrange(120):
if ha_tools.get_primary() and len(ha_tools.get_secondaries()) == 4:
break
yield self.pause(1)
else:
self.fail("New secondaries didn't join")
ha_tools.kill_members([primary, secondary1], 9)
# Wait for primary
for _ in xrange(30):
if ha_tools.get_primary() and len(ha_tools.get_secondaries()) == 2:
break
yield self.pause(1)
else:
self.fail("No failover")
# Ensure monitor picks up new members
yield self.pause(2 * MONITOR_INTERVAL)
try:
yield db.test.find_one()
except AutoReconnect:
# Might take one try to reconnect
yield self.pause(1)
# No error
yield db.test.find_one()
yield db.test.find_one(read_preference=SECONDARY)
def test_auth_during_failover(self):
self.assertTrue(self.db.authenticate('user', 'userpass'))
self.assertTrue(
self.db.foo.insert({'foo': 'bar'}, safe=True, w=3, wtimeout=1000))
self.db.logout()
self.assertRaises(OperationFailure, self.db.foo.find_one)
primary = '%s:%d' % self.c.primary
ha_tools.kill_members([primary], 2)
# Let monitor notice primary's gone
sleep(2 * MONITOR_INTERVAL)
# Make sure we can still authenticate
self.assertTrue(self.db.authenticate('user', 'userpass'))
# And still query.
self.db.read_preference = PRIMARY_PREFERRED
self.assertEqual('bar', self.db.foo.find_one()['foo'])
def test_auth_during_failover(self):
self.assertTrue(self.db.authenticate('user', 'userpass'))
self.assertTrue(self.db.foo.insert({'foo': 'bar'},
safe=True, w=3, wtimeout=3000))
self.db.logout()
self.assertRaises(OperationFailure, self.db.foo.find_one)
primary = '%s:%d' % self.c.primary
ha_tools.kill_members([primary], 2)
# Let monitor notice primary's gone
sleep(2 * MONITOR_INTERVAL)
# Make sure we can still authenticate
self.assertTrue(self.db.authenticate('user', 'userpass'))
# And still query.
self.db.read_preference = PRIMARY_PREFERRED
self.assertEqual('bar', self.db.foo.find_one()['foo'])
def test_auth_during_failover(self):
self.assertTrue(self.db.authenticate('user', 'userpass'))
db = self.db.client.get_database(
self.db.name, write_concern=WriteConcern(w=3, wtimeout=3000))
self.assertTrue(db.foo.insert_one({'foo': 'bar'}))
self.db.logout()
self.assertRaises(OperationFailure, self.db.foo.find_one)
primary = self.c.primary
ha_tools.kill_members(['%s:%d' % primary], 2)
# Let monitor notice primary's gone
time.sleep(2 * self.heartbeat_frequency)
self.assertFalse(primary == self.c.primary)
# Make sure we can still authenticate
self.assertTrue(self.db.authenticate('user', 'userpass'))
# And still query.
self.db.read_preference = PRIMARY_PREFERRED
self.assertEqual('bar', self.db.foo.find_one()['foo'])
def test_auth_during_failover(self):
self.assertTrue(self.db.authenticate('user', 'userpass'))
db = self.db.client.get_database(
self.db.name, write_concern=WriteConcern(w=3, wtimeout=3000))
self.assertTrue(db.foo.insert_one({'foo': 'bar'}))
self.db.logout()
self.assertRaises(OperationFailure, self.db.foo.find_one)
primary = self.c.primary
ha_tools.kill_members(['%s:%d' % primary], 2)
# Let monitor notice primary's gone
time.sleep(2 * self.heartbeat_frequency)
self.assertFalse(primary == self.c.primary)
# Make sure we can still authenticate
self.assertTrue(self.db.authenticate('user', 'userpass'))
# And still query.
self.db.read_preference = PRIMARY_PREFERRED
self.assertEqual('bar', self.db.foo.find_one()['foo'])
def test_read_preference(self):
# This is long, but we put all the tests in one function to save time
# on setUp, which takes about 30 seconds to bring up a replica set.
# We pass through four states:
#
# 1. A primary and two secondaries
# 2. Primary down
# 3. Primary up, one secondary down
# 4. Primary up, all secondaries down
#
# For each state, we verify the behavior of PRIMARY,
# PRIMARY_PREFERRED, SECONDARY, SECONDARY_PREFERRED, and NEAREST
c = motor.MotorReplicaSetClient(self.seed, replicaSet=self.name)
yield c.open()
@gen.coroutine
def read_from_which_host(
rsc,
mode,
tag_sets=None,
latency=15,
):
db = rsc.motor_test
db.read_preference = mode
if isinstance(tag_sets, dict):
tag_sets = [tag_sets]
db.tag_sets = tag_sets or [{}]
db.secondary_acceptable_latency_ms = latency
cursor = db.test.find()
try:
yield cursor.fetch_next
raise gen.Return(cursor.delegate._Cursor__connection_id)
except AutoReconnect:
raise gen.Return(None)
@gen.coroutine
def assert_read_from(member, *args, **kwargs):
for _ in range(10):
used = yield read_from_which_host(c, *args, **kwargs)
self.assertEqual(member, used)
@gen.coroutine
def assert_read_from_all(members, *args, **kwargs):
members = set(members)
all_used = set()
for _ in range(100):
used = yield read_from_which_host(c, *args, **kwargs)
all_used.add(used)
if members == all_used:
raise gen.Return() # Success
# This will fail
self.assertEqual(members, all_used)
def unpartition_node(node):
host, port = node
return '%s:%s' % (host, port)
primary = self.primary
secondary = self.secondary
other_secondary = self.other_secondary
bad_tag = {'bad': 'tag'}
# 1. THREE MEMBERS UP -------------------------------------------------
# PRIMARY
yield assert_read_from(primary, PRIMARY)
# PRIMARY_PREFERRED
# Trivial: mode and tags both match
yield assert_read_from(primary, PRIMARY_PREFERRED, self.primary_dc)
# Secondary matches but not primary, choose primary
yield assert_read_from(primary, PRIMARY_PREFERRED, self.secondary_dc)
# Chooses primary, ignoring tag sets
yield assert_read_from(primary, PRIMARY_PREFERRED, self.primary_dc)
# Chooses primary, ignoring tag sets
yield assert_read_from(primary, PRIMARY_PREFERRED, bad_tag)
yield assert_read_from(primary, PRIMARY_PREFERRED, [bad_tag, {}])
# SECONDARY
yield assert_read_from_all(
[secondary, other_secondary], SECONDARY, latency=9999999)
# SECONDARY_PREFERRED
yield assert_read_from_all(
[secondary, other_secondary], SECONDARY_PREFERRED, latency=9999999)
# Multiple tags
yield assert_read_from(
secondary, SECONDARY_PREFERRED, self.secondary_tags)
# Fall back to primary if it's the only one matching the tags
yield assert_read_from(
primary, SECONDARY_PREFERRED, {'name': 'primary'})
# No matching secondaries
yield assert_read_from(primary, SECONDARY_PREFERRED, bad_tag)
# Fall back from non-matching tag set to matching set
yield assert_read_from_all(
[secondary, other_secondary],
SECONDARY_PREFERRED, [bad_tag, {}], latency=9999999)
yield assert_read_from(
other_secondary,
SECONDARY_PREFERRED, [bad_tag, {'dc': 'ny'}])
# NEAREST
self.clear_ping_times()
yield assert_read_from_all(
[primary, secondary, other_secondary], NEAREST, latency=9999999)
yield assert_read_from_all(
[primary, other_secondary],
NEAREST, [bad_tag, {'dc': 'ny'}], latency=9999999)
self.set_ping_time(primary, 0)
self.set_ping_time(secondary, .03) # 30 milliseconds.
self.set_ping_time(other_secondary, 10)
# Nearest member, no tags
yield assert_read_from(primary, NEAREST)
# Tags override nearness
yield assert_read_from(primary, NEAREST, {'name': 'primary'})
yield assert_read_from(secondary, NEAREST, self.secondary_dc)
# Make secondary fast
self.set_ping_time(primary, .03) # 30 milliseconds.
self.set_ping_time(secondary, 0)
yield assert_read_from(secondary, NEAREST)
# Other secondary fast
self.set_ping_time(secondary, 10)
self.set_ping_time(other_secondary, 0)
yield assert_read_from(other_secondary, NEAREST)
# High secondaryAcceptableLatencyMS, should read from all members
yield assert_read_from_all(
[primary, secondary, other_secondary],
NEAREST, latency=9999999)
self.clear_ping_times()
yield assert_read_from_all(
[primary, other_secondary], NEAREST, [{'dc': 'ny'}],
latency=9999999)
# 2. PRIMARY DOWN -----------------------------------------------------
killed = ha_tools.kill_primary()
# Let monitor notice primary's gone
yield self.pause(2 * MONITOR_INTERVAL)
# PRIMARY
yield assert_read_from(None, PRIMARY)
# PRIMARY_PREFERRED
# No primary, choose matching secondary
yield assert_read_from_all(
[secondary, other_secondary], PRIMARY_PREFERRED, latency=9999999)
yield assert_read_from(
secondary, PRIMARY_PREFERRED, {'name': 'secondary'})
# No primary or matching secondary
yield assert_read_from(None, PRIMARY_PREFERRED, bad_tag)
# SECONDARY
yield assert_read_from_all(
[secondary, other_secondary], SECONDARY, latency=9999999)
# Only primary matches
yield assert_read_from(None, SECONDARY, {'name': 'primary'})
# No matching secondaries
yield assert_read_from(None, SECONDARY, bad_tag)
# SECONDARY_PREFERRED
yield assert_read_from_all(
[secondary, other_secondary], SECONDARY_PREFERRED, latency=9999999)
# Mode and tags both match
yield assert_read_from(
secondary, SECONDARY_PREFERRED, {'name': 'secondary'})
# NEAREST
self.clear_ping_times()
yield assert_read_from_all(
[secondary, other_secondary], NEAREST, latency=9999999)
# 3. PRIMARY UP, ONE SECONDARY DOWN -----------------------------------
ha_tools.restart_members([killed])
for _ in range(30):
if ha_tools.get_primary():
break
yield self.pause(1)
else:
self.fail("Primary didn't come back up")
ha_tools.kill_members([unpartition_node(secondary)], 2)
self.assertTrue(pymongo.MongoClient(
unpartition_node(primary),
slave_okay=True
).admin.command('ismaster')['ismaster'])
yield self.pause(2 * MONITOR_INTERVAL)
# PRIMARY
yield assert_read_from(primary, PRIMARY)
# PRIMARY_PREFERRED
yield assert_read_from(primary, PRIMARY_PREFERRED)
# SECONDARY
yield assert_read_from(other_secondary, SECONDARY)
yield assert_read_from(
other_secondary, SECONDARY, self.other_secondary_dc)
# Only the down secondary matches
yield assert_read_from(None, SECONDARY, {'name': 'secondary'})
# SECONDARY_PREFERRED
yield assert_read_from(other_secondary, SECONDARY_PREFERRED)
yield assert_read_from(
other_secondary, SECONDARY_PREFERRED, self.other_secondary_dc)
# The secondary matching the tag is down, use primary
yield assert_read_from(
primary, SECONDARY_PREFERRED, {'name': 'secondary'})
# NEAREST
yield assert_read_from_all(
[primary, other_secondary], NEAREST, latency=9999999)
yield assert_read_from(
other_secondary, NEAREST, {'name': 'other_secondary'})
yield assert_read_from(primary, NEAREST, {'name': 'primary'})
# 4. PRIMARY UP, ALL SECONDARIES DOWN ---------------------------------
ha_tools.kill_members([unpartition_node(other_secondary)], 2)
self.assertTrue(pymongo.MongoClient(
unpartition_node(primary),
slave_okay=True
).admin.command('ismaster')['ismaster'])
# PRIMARY
yield assert_read_from(primary, PRIMARY)
# PRIMARY_PREFERRED
yield assert_read_from(primary, PRIMARY_PREFERRED)
yield assert_read_from(primary, PRIMARY_PREFERRED, self.secondary_dc)
# SECONDARY
yield assert_read_from(None, SECONDARY)
yield assert_read_from(None, SECONDARY, self.other_secondary_dc)
yield assert_read_from(None, SECONDARY, {'dc': 'ny'})
# SECONDARY_PREFERRED
yield assert_read_from(primary, SECONDARY_PREFERRED)
yield assert_read_from(primary, SECONDARY_PREFERRED, self.secondary_dc)
yield assert_read_from(
primary, SECONDARY_PREFERRED, {'name': 'secondary'})
yield assert_read_from(primary, SECONDARY_PREFERRED, {'dc': 'ny'})
# NEAREST
yield assert_read_from(primary, NEAREST)
yield assert_read_from(None, NEAREST, self.secondary_dc)
yield assert_read_from(None, NEAREST, {'name': 'secondary'})
# Even if primary's slow, still read from it
self.set_ping_time(primary, 100)
yield assert_read_from(primary, NEAREST)
yield assert_read_from(None, NEAREST, self.secondary_dc)
self.clear_ping_times()
def test_ship_of_theseus(self):
c = MongoClient(
self.seed,
replicaSet=self.name,
serverSelectionTimeoutMS=self.server_selection_timeout)
db = c.get_database(
"pymongo_test",
write_concern=WriteConcern(w=len(c.secondaries) + 1))
db.test.insert_one({})
find_one = db.test.find_one
primary = ha_tools.get_primary()
secondary1 = ha_tools.get_random_secondary()
new_hosts = []
for i in range(3):
new_hosts.append(ha_tools.add_member())
# RS closes all connections after reconfig.
for j in xrange(30):
try:
if ha_tools.get_primary():
break
except (ConnectionFailure, OperationFailure):
pass
time.sleep(1)
else:
self.fail("Couldn't recover from reconfig")
# Wait for new members to join.
for _ in xrange(120):
if ha_tools.get_primary() and len(ha_tools.get_secondaries()) == 4:
break
time.sleep(1)
else:
self.fail("New secondaries didn't join")
ha_tools.kill_members([primary, secondary1], 9)
time.sleep(5)
wait_until(lambda: (ha_tools.get_primary()
and len(ha_tools.get_secondaries()) == 2),
"fail over",
timeout=30)
time.sleep(2 * self.heartbeat_frequency)
# No error.
find_one()
find_one(read_preference=SECONDARY)
# All members down.
ha_tools.kill_members(new_hosts, 9)
self.assertRaises(
ConnectionFailure,
find_one, read_preference=SECONDARY)
ha_tools.restart_members(new_hosts)
# Should be able to reconnect to set even though original seed
# list is useless. Use SECONDARY so we don't have to wait for
# the election, merely for the client to detect members are up.
time.sleep(2 * self.heartbeat_frequency)
find_one(read_preference=SECONDARY)
# Kill new members and switch back to original two members.
ha_tools.kill_members(new_hosts, 9)
self.assertRaises(
ConnectionFailure,
find_one, read_preference=SECONDARY)
ha_tools.restart_members([primary, secondary1])
# Wait for members to figure out they're secondaries.
wait_until(lambda: len(ha_tools.get_secondaries()) == 2,
"detect two secondaries",
timeout=30)
# Should be able to reconnect to set again.
time.sleep(2 * self.heartbeat_frequency)
find_one(read_preference=SECONDARY)
def test_read_preference(self):
# We pass through four states:
#
# 1. A primary and two secondaries
# 2. Primary down
# 3. Primary up, one secondary down
# 4. Primary up, all secondaries down
#
# For each state, we verify the behavior of PRIMARY,
# PRIMARY_PREFERRED, SECONDARY, SECONDARY_PREFERRED, and NEAREST
c = MongoClient(
self.seed,
replicaSet=self.name,
serverSelectionTimeoutMS=self.server_selection_timeout)
wait_until(lambda: c.primary, "discover primary")
wait_until(lambda: len(c.secondaries) == 2, "discover secondaries")
def assertReadFrom(member, *args, **kwargs):
utils.assertReadFrom(self, c, member, *args, **kwargs)
def assertReadFromAll(members, *args, **kwargs):
utils.assertReadFromAll(self, c, members, *args, **kwargs)
def unpartition_node(node):
host, port = node
return '%s:%s' % (host, port)
# To make the code terser, copy hosts into local scope
primary = self.primary
secondary = self.secondary
other_secondary = self.other_secondary
bad_tag = {'bad': 'tag'}
# 1. THREE MEMBERS UP -------------------------------------------------
# PRIMARY
assertReadFrom(primary, PRIMARY)
# PRIMARY_PREFERRED
# Trivial: mode and tags both match
assertReadFrom(primary, PRIMARY_PREFERRED, self.primary_dc)
# Secondary matches but not primary, choose primary
assertReadFrom(primary, PRIMARY_PREFERRED, self.secondary_dc)
# Chooses primary, ignoring tag sets
assertReadFrom(primary, PRIMARY_PREFERRED, self.primary_dc)
# Chooses primary, ignoring tag sets
assertReadFrom(primary, PRIMARY_PREFERRED, bad_tag)
assertReadFrom(primary, PRIMARY_PREFERRED, [bad_tag, {}])
# SECONDARY
assertReadFromAll([secondary, other_secondary], SECONDARY)
# SECONDARY_PREFERRED
assertReadFromAll([secondary, other_secondary], SECONDARY_PREFERRED)
# Multiple tags
assertReadFrom(secondary, SECONDARY_PREFERRED, self.secondary_tags)
# Fall back to primary if it's the only one matching the tags
assertReadFrom(primary, SECONDARY_PREFERRED, {'name': 'primary'})
# No matching secondaries
assertReadFrom(primary, SECONDARY_PREFERRED, bad_tag)
# Fall back from non-matching tag set to matching set
assertReadFromAll([secondary, other_secondary],
SECONDARY_PREFERRED, [bad_tag, {}])
assertReadFrom(other_secondary,
SECONDARY_PREFERRED, [bad_tag, {'dc': 'ny'}])
# NEAREST
self.clear_ping_times()
assertReadFromAll([primary, secondary, other_secondary], NEAREST)
assertReadFromAll([primary, other_secondary],
NEAREST, [bad_tag, {'dc': 'ny'}])
self.set_ping_time(primary, 0)
self.set_ping_time(secondary, .03) # 30 ms
self.set_ping_time(other_secondary, 10)
# Nearest member, no tags
assertReadFrom(primary, NEAREST)
# Tags override nearness
assertReadFrom(primary, NEAREST, {'name': 'primary'})
assertReadFrom(secondary, NEAREST, self.secondary_dc)
# Make secondary fast
self.set_ping_time(primary, .03) # 30 ms
self.set_ping_time(secondary, 0)
assertReadFrom(secondary, NEAREST)
# Other secondary fast
self.set_ping_time(secondary, 10)
self.set_ping_time(other_secondary, 0)
assertReadFrom(other_secondary, NEAREST)
self.clear_ping_times()
assertReadFromAll([primary, other_secondary], NEAREST, [{'dc': 'ny'}])
# 2. PRIMARY DOWN -----------------------------------------------------
killed = ha_tools.kill_primary()
# Let monitor notice primary's gone
time.sleep(2 * self.heartbeat_frequency)
# PRIMARY
assertReadFrom(None, PRIMARY)
# PRIMARY_PREFERRED
# No primary, choose matching secondary
assertReadFromAll([secondary, other_secondary], PRIMARY_PREFERRED)
assertReadFrom(secondary, PRIMARY_PREFERRED, {'name': 'secondary'})
# No primary or matching secondary
assertReadFrom(None, PRIMARY_PREFERRED, bad_tag)
# SECONDARY
assertReadFromAll([secondary, other_secondary], SECONDARY)
# Only primary matches
assertReadFrom(None, SECONDARY, {'name': 'primary'})
# No matching secondaries
assertReadFrom(None, SECONDARY, bad_tag)
# SECONDARY_PREFERRED
assertReadFromAll([secondary, other_secondary], SECONDARY_PREFERRED)
# Mode and tags both match
assertReadFrom(secondary, SECONDARY_PREFERRED, {'name': 'secondary'})
# NEAREST
self.clear_ping_times()
assertReadFromAll([secondary, other_secondary], NEAREST)
# 3. PRIMARY UP, ONE SECONDARY DOWN -----------------------------------
ha_tools.restart_members([killed])
ha_tools.wait_for_primary()
ha_tools.kill_members([unpartition_node(secondary)], 2)
time.sleep(5)
ha_tools.wait_for_primary()
time.sleep(2 * self.heartbeat_frequency)
# PRIMARY
assertReadFrom(primary, PRIMARY)
# PRIMARY_PREFERRED
assertReadFrom(primary, PRIMARY_PREFERRED)
# SECONDARY
assertReadFrom(other_secondary, SECONDARY)
assertReadFrom(other_secondary, SECONDARY, self.other_secondary_dc)
# Only the down secondary matches
assertReadFrom(None, SECONDARY, {'name': 'secondary'})
# SECONDARY_PREFERRED
assertReadFrom(other_secondary, SECONDARY_PREFERRED)
assertReadFrom(
other_secondary, SECONDARY_PREFERRED, self.other_secondary_dc)
# The secondary matching the tag is down, use primary
assertReadFrom(primary, SECONDARY_PREFERRED, {'name': 'secondary'})
# NEAREST
assertReadFromAll([primary, other_secondary], NEAREST)
assertReadFrom(other_secondary, NEAREST, {'name': 'other_secondary'})
assertReadFrom(primary, NEAREST, {'name': 'primary'})
# 4. PRIMARY UP, ALL SECONDARIES DOWN ---------------------------------
ha_tools.kill_members([unpartition_node(other_secondary)], 2)
# PRIMARY
assertReadFrom(primary, PRIMARY)
# PRIMARY_PREFERRED
assertReadFrom(primary, PRIMARY_PREFERRED)
assertReadFrom(primary, PRIMARY_PREFERRED, self.secondary_dc)
# SECONDARY
assertReadFrom(None, SECONDARY)
assertReadFrom(None, SECONDARY, self.other_secondary_dc)
assertReadFrom(None, SECONDARY, {'dc': 'ny'})
# SECONDARY_PREFERRED
assertReadFrom(primary, SECONDARY_PREFERRED)
assertReadFrom(primary, SECONDARY_PREFERRED, self.secondary_dc)
assertReadFrom(primary, SECONDARY_PREFERRED, {'name': 'secondary'})
assertReadFrom(primary, SECONDARY_PREFERRED, {'dc': 'ny'})
# NEAREST
assertReadFrom(primary, NEAREST)
assertReadFrom(None, NEAREST, self.secondary_dc)
assertReadFrom(None, NEAREST, {'name': 'secondary'})
# Even if primary's slow, still read from it
self.set_ping_time(primary, 100)
assertReadFrom(primary, NEAREST)
assertReadFrom(None, NEAREST, self.secondary_dc)
self.clear_ping_times()
def test_ship_of_theseus(self):
c = MongoReplicaSetClient(
self.seed, replicaSet=self.name, use_greenlets=use_greenlets)
db = c.pymongo_test
db.test.insert({}, w=len(c.secondaries) + 1)
find_one = db.test.find_one
primary = ha_tools.get_primary()
secondary1 = ha_tools.get_random_secondary()
new_hosts = [ha_tools.add_member() for _ in range(3)]
# Wait for new members to join.
for _ in xrange(120):
if ha_tools.get_primary() and len(ha_tools.get_secondaries()) == 4:
break
sleep(1)
else:
self.fail("New secondaries didn't join")
ha_tools.kill_members([primary, secondary1], 9)
# Wait for primary.
for _ in xrange(30):
if ha_tools.get_primary() and len(ha_tools.get_secondaries()) == 2:
break
sleep(1)
else:
self.fail("No failover")
sleep(2 * MONITOR_INTERVAL)
# No error.
find_one()
find_one(read_preference=SECONDARY)
# All members down.
ha_tools.kill_members(new_hosts, 9)
self.assertRaises(
ConnectionFailure,
find_one, read_preference=SECONDARY)
ha_tools.restart_members(new_hosts)
# Should be able to reconnect to set even though original seed
# list is useless. Use SECONDARY so we don't have to wait for
# the election, merely for the client to detect members are up.
sleep(2 * MONITOR_INTERVAL)
find_one(read_preference=SECONDARY)
# Kill new members and switch back to original two members.
ha_tools.kill_members(new_hosts, 9)
self.assertRaises(
ConnectionFailure,
find_one, read_preference=SECONDARY)
ha_tools.restart_members([primary, secondary1])
# Should be able to reconnect to set again.
sleep(2 * MONITOR_INTERVAL)
find_one(read_preference=SECONDARY)
def test_read_preference(self):
# This is long, but we put all the tests in one function to save time
# on setUp, which takes about 30 seconds to bring up a replica set.
# We pass through four states:
#
# 1. A primary and two secondaries
# 2. Primary down
# 3. Primary up, one secondary down
# 4. Primary up, all secondaries down
#
# For each state, we verify the behavior of PRIMARY,
# PRIMARY_PREFERRED, SECONDARY, SECONDARY_PREFERRED, and NEAREST
c = motor.MotorReplicaSetClient(self.seed, replicaSet=self.name)
yield c.open()
@gen.coroutine
def read_from_which_host(
rsc,
mode,
tag_sets=None,
latency=15,
):
db = rsc.motor_test
db.read_preference = mode
if isinstance(tag_sets, dict):
tag_sets = [tag_sets]
db.tag_sets = tag_sets or [{}]
db.secondary_acceptable_latency_ms = latency
cursor = db.test.find()
try:
yield cursor.fetch_next
raise gen.Return(cursor.delegate._Cursor__connection_id)
except AutoReconnect:
raise gen.Return(None)
@gen.coroutine
def assert_read_from(member, *args, **kwargs):
for _ in range(10):
used = yield read_from_which_host(c, *args, **kwargs)
self.assertEqual(member, used)
@gen.coroutine
def assert_read_from_all(members, *args, **kwargs):
members = set(members)
all_used = set()
for _ in range(100):
used = yield read_from_which_host(c, *args, **kwargs)
all_used.add(used)
if members == all_used:
raise gen.Return() # Success
# This will fail
self.assertEqual(members, all_used)
def unpartition_node(node):
host, port = node
return '%s:%s' % (host, port)
primary = self.primary
secondary = self.secondary
other_secondary = self.other_secondary
bad_tag = {'bad': 'tag'}
# 1. THREE MEMBERS UP -------------------------------------------------
# PRIMARY
yield assert_read_from(primary, PRIMARY)
# PRIMARY_PREFERRED
# Trivial: mode and tags both match
yield assert_read_from(primary, PRIMARY_PREFERRED, self.primary_dc)
# Secondary matches but not primary, choose primary
yield assert_read_from(primary, PRIMARY_PREFERRED, self.secondary_dc)
# Chooses primary, ignoring tag sets
yield assert_read_from(primary, PRIMARY_PREFERRED, self.primary_dc)
# Chooses primary, ignoring tag sets
yield assert_read_from(primary, PRIMARY_PREFERRED, bad_tag)
yield assert_read_from(primary, PRIMARY_PREFERRED, [bad_tag, {}])
# SECONDARY
yield assert_read_from_all([secondary, other_secondary],
SECONDARY,
latency=9999999)
# SECONDARY_PREFERRED
yield assert_read_from_all([secondary, other_secondary],
SECONDARY_PREFERRED,
latency=9999999)
# Multiple tags
yield assert_read_from(secondary, SECONDARY_PREFERRED,
self.secondary_tags)
# Fall back to primary if it's the only one matching the tags
yield assert_read_from(primary, SECONDARY_PREFERRED,
{'name': 'primary'})
# No matching secondaries
yield assert_read_from(primary, SECONDARY_PREFERRED, bad_tag)
# Fall back from non-matching tag set to matching set
yield assert_read_from_all([secondary, other_secondary],
SECONDARY_PREFERRED, [bad_tag, {}],
latency=9999999)
yield assert_read_from(other_secondary, SECONDARY_PREFERRED,
[bad_tag, {
'dc': 'ny'
}])
# NEAREST
self.clear_ping_times()
yield assert_read_from_all([primary, secondary, other_secondary],
NEAREST,
latency=9999999)
yield assert_read_from_all([primary, other_secondary],
NEAREST, [bad_tag, {
'dc': 'ny'
}],
latency=9999999)
self.set_ping_time(primary, 0)
self.set_ping_time(secondary, .03) # 30 milliseconds.
self.set_ping_time(other_secondary, 10)
# Nearest member, no tags
yield assert_read_from(primary, NEAREST)
# Tags override nearness
yield assert_read_from(primary, NEAREST, {'name': 'primary'})
yield assert_read_from(secondary, NEAREST, self.secondary_dc)
# Make secondary fast
self.set_ping_time(primary, .03) # 30 milliseconds.
self.set_ping_time(secondary, 0)
yield assert_read_from(secondary, NEAREST)
# Other secondary fast
self.set_ping_time(secondary, 10)
self.set_ping_time(other_secondary, 0)
yield assert_read_from(other_secondary, NEAREST)
# High secondaryAcceptableLatencyMS, should read from all members
yield assert_read_from_all([primary, secondary, other_secondary],
NEAREST,
latency=9999999)
self.clear_ping_times()
yield assert_read_from_all([primary, other_secondary],
NEAREST, [{
'dc': 'ny'
}],
latency=9999999)
# 2. PRIMARY DOWN -----------------------------------------------------
killed = ha_tools.kill_primary()
# Let monitor notice primary's gone
yield self.pause(2 * MONITOR_INTERVAL)
# PRIMARY
yield assert_read_from(None, PRIMARY)
# PRIMARY_PREFERRED
# No primary, choose matching secondary
yield assert_read_from_all([secondary, other_secondary],
PRIMARY_PREFERRED,
latency=9999999)
yield assert_read_from(secondary, PRIMARY_PREFERRED,
{'name': 'secondary'})
# No primary or matching secondary
yield assert_read_from(None, PRIMARY_PREFERRED, bad_tag)
# SECONDARY
yield assert_read_from_all([secondary, other_secondary],
SECONDARY,
latency=9999999)
# Only primary matches
yield assert_read_from(None, SECONDARY, {'name': 'primary'})
# No matching secondaries
yield assert_read_from(None, SECONDARY, bad_tag)
# SECONDARY_PREFERRED
yield assert_read_from_all([secondary, other_secondary],
SECONDARY_PREFERRED,
latency=9999999)
# Mode and tags both match
yield assert_read_from(secondary, SECONDARY_PREFERRED,
{'name': 'secondary'})
# NEAREST
self.clear_ping_times()
yield assert_read_from_all([secondary, other_secondary],
NEAREST,
latency=9999999)
# 3. PRIMARY UP, ONE SECONDARY DOWN -----------------------------------
ha_tools.restart_members([killed])
for _ in range(30):
if ha_tools.get_primary():
break
yield self.pause(1)
else:
self.fail("Primary didn't come back up")
ha_tools.kill_members([unpartition_node(secondary)], 2)
self.assertTrue(
pymongo.MongoClient(
unpartition_node(primary),
slave_okay=True).admin.command('ismaster')['ismaster'])
yield self.pause(2 * MONITOR_INTERVAL)
# PRIMARY
yield assert_read_from(primary, PRIMARY)
# PRIMARY_PREFERRED
yield assert_read_from(primary, PRIMARY_PREFERRED)
# SECONDARY
yield assert_read_from(other_secondary, SECONDARY)
yield assert_read_from(other_secondary, SECONDARY,
self.other_secondary_dc)
# Only the down secondary matches
yield assert_read_from(None, SECONDARY, {'name': 'secondary'})
# SECONDARY_PREFERRED
yield assert_read_from(other_secondary, SECONDARY_PREFERRED)
yield assert_read_from(other_secondary, SECONDARY_PREFERRED,
self.other_secondary_dc)
# The secondary matching the tag is down, use primary
yield assert_read_from(primary, SECONDARY_PREFERRED,
{'name': 'secondary'})
# NEAREST
yield assert_read_from_all([primary, other_secondary],
NEAREST,
latency=9999999)
yield assert_read_from(other_secondary, NEAREST,
{'name': 'other_secondary'})
yield assert_read_from(primary, NEAREST, {'name': 'primary'})
# 4. PRIMARY UP, ALL SECONDARIES DOWN ---------------------------------
ha_tools.kill_members([unpartition_node(other_secondary)], 2)
self.assertTrue(
pymongo.MongoClient(
unpartition_node(primary),
slave_okay=True).admin.command('ismaster')['ismaster'])
# PRIMARY
yield assert_read_from(primary, PRIMARY)
# PRIMARY_PREFERRED
yield assert_read_from(primary, PRIMARY_PREFERRED)
yield assert_read_from(primary, PRIMARY_PREFERRED, self.secondary_dc)
# SECONDARY
yield assert_read_from(None, SECONDARY)
yield assert_read_from(None, SECONDARY, self.other_secondary_dc)
yield assert_read_from(None, SECONDARY, {'dc': 'ny'})
# SECONDARY_PREFERRED
yield assert_read_from(primary, SECONDARY_PREFERRED)
yield assert_read_from(primary, SECONDARY_PREFERRED, self.secondary_dc)
yield assert_read_from(primary, SECONDARY_PREFERRED,
{'name': 'secondary'})
yield assert_read_from(primary, SECONDARY_PREFERRED, {'dc': 'ny'})
# NEAREST
yield assert_read_from(primary, NEAREST)
yield assert_read_from(None, NEAREST, self.secondary_dc)
yield assert_read_from(None, NEAREST, {'name': 'secondary'})
# Even if primary's slow, still read from it
self.set_ping_time(primary, 100)
yield assert_read_from(primary, NEAREST)
yield assert_read_from(None, NEAREST, self.secondary_dc)
self.clear_ping_times()
def post(self, op):
""" Respond to a POST
"""
# Start RS
if op == 'start':
request = self._parse_json(self.request.body)
members = request['members']
rs_id = uuid.uuid4()
rs_name = 'repl' + str(get_new_repl_id())
try:
# start RS and get its' params
res = ha_tools.start_replica_set(members, rs_name=rs_name)
except:
self.error("Couldn't start RS!")
# Let's gather all the info about RS and save it
rs_uri, rs_name, nodes, arbiters = res
# Try to connect to new RS
try:
for _ in range(1 * 60 / 2):
time.sleep(2)
try:
c = ReplicaSetConnection(rs_uri, replicaSet=rs_name)
except:
pass
except:
self.error("Couldn't connect to the new RS: " + rs_uri + ", " + rs_name)
secondaries_uris = []
for secondary in c.secondaries:
secondaries_uris.append('%s:%d' % (secondary))
rs_t = {}
rs_t['id'] = str(rs_id)
rs_t['name'] = rs_name
rs_t['primary'] = rs_uri
rs_t['secondaries'] = secondaries_uris
rs_t['nodes'] = nodes
rs_t['arbiters'] = arbiters
rs.append(rs_t)
self.write(self._template.load(op + self._ext).generate(rs_id=rs_id, rs_uri=rs_uri, rs_name=rs_name))
# FIXME: Some checks should be implemented
# Stop rs
elif op == 'stop':
request = self._parse_json(self.request.body)
rs_id = request['rs']['id']
found_index = self._get_index(rs, 'id', rs_id)
try:
ha_tools.kill_members(rs[found_index]['nodes'].keys(), 2, rs[found_index]['nodes'])
rs_t = rs.pop(found_index)
except:
self.error("Couldn't stop RS!")
rs_id = rs_t['id']
self.write(self._template.load(op + self._ext).generate(rs_id=rs_id))
# Get primary
elif op == 'get_primary':
request = self._parse_json(self.request.body)
rs_id = request['rs']['id']
found_index = self._get_index(rs, 'id', rs_id)
rs_primary_uri = rs[found_index]['primary']
self.write(self._template.load(op + self._ext).generate(rs_id=rs_id, rs_primary_uri=rs_primary_uri))
# Get secondaries
elif op == 'get_secondaries':
request = self._parse_json(self.request.body)
rs_id = request['rs']['id']
found_index = self._get_index(rs, 'id', rs_id)
rs_secondaries_uris = rs[found_index]['secondaries']
self.write(self._template.load(op + self._ext).generate(rs_id=rs_id, rs_secondaries_uris=rs_secondaries_uris))
# Get the arbiters
elif op == 'get_arbiters':
request = self._parse_json(self.request.body)
rs_id = request['rs']['id']
found_index = self._get_index(rs, 'id', rs_id)
rs_arbiters_uris = rs[found_index]['arbiters']
self.write(self._template.load(op + self._ext).generate(rs_id=rs_id, rs_arbiters_uris=rs_arbiters_uris))
# Kill the primary
elif op == 'kill_primary':
request = self._parse_json(self.request.body)
rs_id = request['rs']['id']
found_index = self._get_index(rs, 'id', rs_id)
try:
rs_primary_uri = rs[found_index]['primary']
ha_tools.kill_members([rs_primary_uri], 2, rs[found_index]['nodes'])
del rs[found_index]['primary']
except:
self.error("No primary found for this RS!")
self.write(self._template.load(op + self._ext).generate(rs_id=rs_id, rs_killed_primary_uri=rs_primary_uri))
# Kill the secondary
elif op == 'kill_secondary':
request = self._parse_json(self.request.body)
rs_id = request['rs']['id']
try:
found_index = self._get_index(rs, 'id', rs_id)
except:
self.error("No secondaries found for this RS!")
rs_secondaries_uris = rs[found_index]['secondaries']
try:
# Get a random secondary for this RS
# Get a random index first
rs_secondary_uri_index = random.randrange( len(rs_secondaries_uris) )
# Pop out the element by this random index
rs_secondary_uri = rs[found_index]['secondaries'].pop(rs_secondary_uri_index)
ha_tools.kill_members([rs_secondary_uri], 2, rs[found_index]['nodes'])
del rs[found_index]['nodes'][rs_secondary_uri]
except:
self.error("No secondaries found for this RS!")
self.write(self._template.load(op + self._ext).generate(rs_id=rs_id, rs_killed_secondary_uri=rs_secondary_uri))
# Kill all the secondaries
elif op == 'kill_all_secondaries':
request = self._parse_json(self.request.body)
rs_id = request['rs']['id']
found_index = self._get_index(rs, 'id', rs_id)
try:
rs_secondaries_uris = rs[found_index]['secondaries']
ha_tools.kill_members(rs_secondaries_uris, 2, rs[found_index]['nodes'])
del rs[found_index]['secondaries']
except:
self.error("No secondaries found for this RS!")
self.write(self._template.load(op + self._ext).generate(rs_id=rs_id, rs_killed_secondaries_uris=rs_secondaries_uris))
def post(self, op):
""" Respond to a POST
"""
# Start RS
if op == 'start':
request = self._parse_json(self.request.body)
members = request['members']
rs_id = uuid.uuid4()
rs_name = 'repl' + str(get_new_repl_id())
try:
# start RS and get its' params
res = ha_tools.start_replica_set(members, rs_name=rs_name)
except:
self.error("Couldn't start RS!")
# Let's gather all the info about RS and save it
rs_uri, rs_name, nodes, arbiters = res
# Try to connect to new RS
try:
for _ in range(1 * 60 / 2):
time.sleep(2)
try:
c = ReplicaSetConnection(rs_uri, replicaSet=rs_name)
except:
pass
except:
self.error("Couldn't connect to the new RS: " + rs_uri + ", " +
rs_name)
secondaries_uris = []
for secondary in c.secondaries:
secondaries_uris.append('%s:%d' % (secondary))
rs_t = {}
rs_t['id'] = str(rs_id)
rs_t['name'] = rs_name
rs_t['primary'] = rs_uri
rs_t['secondaries'] = secondaries_uris
rs_t['nodes'] = nodes
rs_t['arbiters'] = arbiters
rs.append(rs_t)
self.write(
self._template.load(op + self._ext).generate(rs_id=rs_id,
rs_uri=rs_uri,
rs_name=rs_name))
# FIXME: Some checks should be implemented
# Stop rs
elif op == 'stop':
request = self._parse_json(self.request.body)
rs_id = request['rs']['id']
found_index = self._get_index(rs, 'id', rs_id)
try:
ha_tools.kill_members(rs[found_index]['nodes'].keys(), 2,
rs[found_index]['nodes'])
rs_t = rs.pop(found_index)
except:
self.error("Couldn't stop RS!")
rs_id = rs_t['id']
self.write(
self._template.load(op + self._ext).generate(rs_id=rs_id))
# Get primary
elif op == 'get_primary':
request = self._parse_json(self.request.body)
rs_id = request['rs']['id']
found_index = self._get_index(rs, 'id', rs_id)
rs_primary_uri = rs[found_index]['primary']
self.write(
self._template.load(op + self._ext).generate(
rs_id=rs_id, rs_primary_uri=rs_primary_uri))
# Get secondaries
elif op == 'get_secondaries':
request = self._parse_json(self.request.body)
rs_id = request['rs']['id']
found_index = self._get_index(rs, 'id', rs_id)
rs_secondaries_uris = rs[found_index]['secondaries']
self.write(
self._template.load(op + self._ext).generate(
rs_id=rs_id, rs_secondaries_uris=rs_secondaries_uris))
# Get the arbiters
elif op == 'get_arbiters':
request = self._parse_json(self.request.body)
rs_id = request['rs']['id']
found_index = self._get_index(rs, 'id', rs_id)
rs_arbiters_uris = rs[found_index]['arbiters']
self.write(
self._template.load(op + self._ext).generate(
rs_id=rs_id, rs_arbiters_uris=rs_arbiters_uris))
# Kill the primary
elif op == 'kill_primary':
request = self._parse_json(self.request.body)
rs_id = request['rs']['id']
found_index = self._get_index(rs, 'id', rs_id)
try:
rs_primary_uri = rs[found_index]['primary']
ha_tools.kill_members([rs_primary_uri], 2,
rs[found_index]['nodes'])
del rs[found_index]['primary']
except:
self.error("No primary found for this RS!")
self.write(
self._template.load(op + self._ext).generate(
rs_id=rs_id, rs_killed_primary_uri=rs_primary_uri))
# Kill the secondary
elif op == 'kill_secondary':
request = self._parse_json(self.request.body)
rs_id = request['rs']['id']
try:
found_index = self._get_index(rs, 'id', rs_id)
except:
self.error("No secondaries found for this RS!")
rs_secondaries_uris = rs[found_index]['secondaries']
try:
# Get a random secondary for this RS
# Get a random index first
rs_secondary_uri_index = random.randrange(
len(rs_secondaries_uris))
# Pop out the element by this random index
rs_secondary_uri = rs[found_index]['secondaries'].pop(
rs_secondary_uri_index)
ha_tools.kill_members([rs_secondary_uri], 2,
rs[found_index]['nodes'])
del rs[found_index]['nodes'][rs_secondary_uri]
except:
self.error("No secondaries found for this RS!")
self.write(
self._template.load(op + self._ext).generate(
rs_id=rs_id, rs_killed_secondary_uri=rs_secondary_uri))
# Kill all the secondaries
elif op == 'kill_all_secondaries':
request = self._parse_json(self.request.body)
rs_id = request['rs']['id']
found_index = self._get_index(rs, 'id', rs_id)
try:
rs_secondaries_uris = rs[found_index]['secondaries']
ha_tools.kill_members(rs_secondaries_uris, 2,
rs[found_index]['nodes'])
del rs[found_index]['secondaries']
except:
self.error("No secondaries found for this RS!")
self.write(
self._template.load(op + self._ext).generate(
rs_id=rs_id,
rs_killed_secondaries_uris=rs_secondaries_uris))
def test_ship_of_theseus(self):
c = MongoReplicaSetClient(
self.seed, replicaSet=self.name, use_greenlets=use_greenlets)
db = c.pymongo_test
db.test.insert({}, w=len(c.secondaries) + 1)
find_one = db.test.find_one
primary = ha_tools.get_primary()
secondary1 = ha_tools.get_random_secondary()
new_hosts = []
for i in range(3):
new_hosts.append(ha_tools.add_member())
# RS closes all connections after reconfig.
for j in xrange(30):
try:
if ha_tools.get_primary():
break
except (ConnectionFailure, OperationFailure):
pass
sleep(1)
else:
self.fail("Couldn't recover from reconfig")
# Wait for new members to join.
for _ in xrange(120):
if ha_tools.get_primary() and len(ha_tools.get_secondaries()) == 4:
break
sleep(1)
else:
self.fail("New secondaries didn't join")
ha_tools.kill_members([primary, secondary1], 9)
sleep(5)
# Wait for primary.
for _ in xrange(30):
if ha_tools.get_primary() and len(ha_tools.get_secondaries()) == 2:
break
sleep(1)
else:
self.fail("No failover")
sleep(2 * MONITOR_INTERVAL)
# No error.
find_one()
find_one(read_preference=SECONDARY)
# All members down.
ha_tools.kill_members(new_hosts, 9)
self.assertRaises(
ConnectionFailure,
find_one, read_preference=SECONDARY)
ha_tools.restart_members(new_hosts)
# Should be able to reconnect to set even though original seed
# list is useless. Use SECONDARY so we don't have to wait for
# the election, merely for the client to detect members are up.
sleep(2 * MONITOR_INTERVAL)
find_one(read_preference=SECONDARY)
# Kill new members and switch back to original two members.
ha_tools.kill_members(new_hosts, 9)
self.assertRaises(
ConnectionFailure,
find_one, read_preference=SECONDARY)
ha_tools.restart_members([primary, secondary1])
# Wait for members to figure out they're secondaries.
for _ in xrange(30):
try:
if len(ha_tools.get_secondaries()) == 2:
break
except ConnectionFailure:
pass
sleep(1)
else:
self.fail("Original members didn't become secondaries")
# Should be able to reconnect to set again.
sleep(2 * MONITOR_INTERVAL)
find_one(read_preference=SECONDARY)
def test_read_preference(self):
# We pass through four states:
#
# 1. A primary and two secondaries
# 2. Primary down
# 3. Primary up, one secondary down
# 4. Primary up, all secondaries down
#
# For each state, we verify the behavior of PRIMARY,
# PRIMARY_PREFERRED, SECONDARY, SECONDARY_PREFERRED, and NEAREST
c = MongoClient(
self.seed,
replicaSet=self.name,
serverSelectionTimeoutMS=self.server_selection_timeout)
wait_until(lambda: c.primary, "discover primary")
wait_until(lambda: len(c.secondaries) == 2, "discover secondaries")
def assertReadFrom(member, *args, **kwargs):
utils.assertReadFrom(self, c, member, *args, **kwargs)
def assertReadFromAll(members, *args, **kwargs):
utils.assertReadFromAll(self, c, members, *args, **kwargs)
def unpartition_node(node):
host, port = node
return '%s:%s' % (host, port)
# To make the code terser, copy hosts into local scope
primary = self.primary
secondary = self.secondary
other_secondary = self.other_secondary
bad_tag = {'bad': 'tag'}
# 1. THREE MEMBERS UP -------------------------------------------------
# PRIMARY
assertReadFrom(primary, PRIMARY)
# PRIMARY_PREFERRED
# Trivial: mode and tags both match
assertReadFrom(primary, PRIMARY_PREFERRED, self.primary_dc)
# Secondary matches but not primary, choose primary
assertReadFrom(primary, PRIMARY_PREFERRED, self.secondary_dc)
# Chooses primary, ignoring tag sets
assertReadFrom(primary, PRIMARY_PREFERRED, self.primary_dc)
# Chooses primary, ignoring tag sets
assertReadFrom(primary, PRIMARY_PREFERRED, bad_tag)
assertReadFrom(primary, PRIMARY_PREFERRED, [bad_tag, {}])
# SECONDARY
assertReadFromAll([secondary, other_secondary], SECONDARY)
# SECONDARY_PREFERRED
assertReadFromAll([secondary, other_secondary], SECONDARY_PREFERRED)
# Multiple tags
assertReadFrom(secondary, SECONDARY_PREFERRED, self.secondary_tags)
# Fall back to primary if it's the only one matching the tags
assertReadFrom(primary, SECONDARY_PREFERRED, {'name': 'primary'})
# No matching secondaries
assertReadFrom(primary, SECONDARY_PREFERRED, bad_tag)
# Fall back from non-matching tag set to matching set
assertReadFromAll([secondary, other_secondary],
SECONDARY_PREFERRED, [bad_tag, {}])
assertReadFrom(other_secondary,
SECONDARY_PREFERRED, [bad_tag, {'dc': 'ny'}])
# NEAREST
self.clear_ping_times()
assertReadFromAll([primary, secondary, other_secondary], NEAREST)
assertReadFromAll([primary, other_secondary],
NEAREST, [bad_tag, {'dc': 'ny'}])
self.set_ping_time(primary, 0)
self.set_ping_time(secondary, .03) # 30 ms
self.set_ping_time(other_secondary, 10)
# Nearest member, no tags
assertReadFrom(primary, NEAREST)
# Tags override nearness
assertReadFrom(primary, NEAREST, {'name': 'primary'})
assertReadFrom(secondary, NEAREST, self.secondary_dc)
# Make secondary fast
self.set_ping_time(primary, .03) # 30 ms
self.set_ping_time(secondary, 0)
assertReadFrom(secondary, NEAREST)
# Other secondary fast
self.set_ping_time(secondary, 10)
self.set_ping_time(other_secondary, 0)
assertReadFrom(other_secondary, NEAREST)
self.clear_ping_times()
assertReadFromAll([primary, other_secondary], NEAREST, [{'dc': 'ny'}])
# 2. PRIMARY DOWN -----------------------------------------------------
killed = ha_tools.kill_primary()
# Let monitor notice primary's gone
time.sleep(2 * self.heartbeat_frequency)
# PRIMARY
assertReadFrom(None, PRIMARY)
# PRIMARY_PREFERRED
# No primary, choose matching secondary
assertReadFromAll([secondary, other_secondary], PRIMARY_PREFERRED)
assertReadFrom(secondary, PRIMARY_PREFERRED, {'name': 'secondary'})
# No primary or matching secondary
assertReadFrom(None, PRIMARY_PREFERRED, bad_tag)
# SECONDARY
assertReadFromAll([secondary, other_secondary], SECONDARY)
# Only primary matches
assertReadFrom(None, SECONDARY, {'name': 'primary'})
# No matching secondaries
assertReadFrom(None, SECONDARY, bad_tag)
# SECONDARY_PREFERRED
assertReadFromAll([secondary, other_secondary], SECONDARY_PREFERRED)
# Mode and tags both match
assertReadFrom(secondary, SECONDARY_PREFERRED, {'name': 'secondary'})
# NEAREST
self.clear_ping_times()
assertReadFromAll([secondary, other_secondary], NEAREST)
# 3. PRIMARY UP, ONE SECONDARY DOWN -----------------------------------
ha_tools.restart_members([killed])
ha_tools.wait_for_primary()
ha_tools.kill_members([unpartition_node(secondary)], 2)
time.sleep(5)
ha_tools.wait_for_primary()
time.sleep(2 * self.heartbeat_frequency)
# PRIMARY
assertReadFrom(primary, PRIMARY)
# PRIMARY_PREFERRED
assertReadFrom(primary, PRIMARY_PREFERRED)
# SECONDARY
assertReadFrom(other_secondary, SECONDARY)
assertReadFrom(other_secondary, SECONDARY, self.other_secondary_dc)
# Only the down secondary matches
assertReadFrom(None, SECONDARY, {'name': 'secondary'})
# SECONDARY_PREFERRED
assertReadFrom(other_secondary, SECONDARY_PREFERRED)
assertReadFrom(
other_secondary, SECONDARY_PREFERRED, self.other_secondary_dc)
# The secondary matching the tag is down, use primary
assertReadFrom(primary, SECONDARY_PREFERRED, {'name': 'secondary'})
# NEAREST
assertReadFromAll([primary, other_secondary], NEAREST)
assertReadFrom(other_secondary, NEAREST, {'name': 'other_secondary'})
assertReadFrom(primary, NEAREST, {'name': 'primary'})
# 4. PRIMARY UP, ALL SECONDARIES DOWN ---------------------------------
ha_tools.kill_members([unpartition_node(other_secondary)], 2)
# PRIMARY
assertReadFrom(primary, PRIMARY)
# PRIMARY_PREFERRED
assertReadFrom(primary, PRIMARY_PREFERRED)
assertReadFrom(primary, PRIMARY_PREFERRED, self.secondary_dc)
# SECONDARY
assertReadFrom(None, SECONDARY)
assertReadFrom(None, SECONDARY, self.other_secondary_dc)
assertReadFrom(None, SECONDARY, {'dc': 'ny'})
# SECONDARY_PREFERRED
assertReadFrom(primary, SECONDARY_PREFERRED)
assertReadFrom(primary, SECONDARY_PREFERRED, self.secondary_dc)
assertReadFrom(primary, SECONDARY_PREFERRED, {'name': 'secondary'})
assertReadFrom(primary, SECONDARY_PREFERRED, {'dc': 'ny'})
# NEAREST
assertReadFrom(primary, NEAREST)
assertReadFrom(None, NEAREST, self.secondary_dc)
assertReadFrom(None, NEAREST, {'name': 'secondary'})
# Even if primary's slow, still read from it
self.set_ping_time(primary, 100)
assertReadFrom(primary, NEAREST)
assertReadFrom(None, NEAREST, self.secondary_dc)
self.clear_ping_times()
def test_ship_of_theseus(self):
c = MongoClient(
self.seed,
replicaSet=self.name,
serverSelectionTimeoutMS=self.server_selection_timeout)
db = c.get_database(
"pymongo_test",
write_concern=WriteConcern(w=len(c.secondaries) + 1))
db.test.insert_one({})
find_one = db.test.find_one
primary = ha_tools.get_primary()
secondary1 = ha_tools.get_random_secondary()
new_hosts = []
for i in range(3):
new_hosts.append(ha_tools.add_member())
# RS closes all connections after reconfig.
for j in xrange(30):
try:
if ha_tools.get_primary():
break
except (ConnectionFailure, OperationFailure):
pass
time.sleep(1)
else:
self.fail("Couldn't recover from reconfig")
# Wait for new members to join.
for _ in xrange(120):
if ha_tools.get_primary() and len(ha_tools.get_secondaries()) == 4:
break
time.sleep(1)
else:
self.fail("New secondaries didn't join")
ha_tools.kill_members([primary, secondary1], 9)
time.sleep(5)
wait_until(lambda: (ha_tools.get_primary()
and len(ha_tools.get_secondaries()) == 2),
"fail over",
timeout=30)
time.sleep(2 * self.heartbeat_frequency)
# No error.
find_one()
find_one(read_preference=SECONDARY)
# All members down.
ha_tools.kill_members(new_hosts, 9)
self.assertRaises(
ConnectionFailure,
find_one, read_preference=SECONDARY)
ha_tools.restart_members(new_hosts)
# Should be able to reconnect to set even though original seed
# list is useless. Use SECONDARY so we don't have to wait for
# the election, merely for the client to detect members are up.
time.sleep(2 * self.heartbeat_frequency)
find_one(read_preference=SECONDARY)
# Kill new members and switch back to original two members.
ha_tools.kill_members(new_hosts, 9)
self.assertRaises(
ConnectionFailure,
find_one, read_preference=SECONDARY)
ha_tools.restart_members([primary, secondary1])
# Wait for members to figure out they're secondaries.
wait_until(lambda: len(ha_tools.get_secondaries()) == 2,
"detect two secondaries",
timeout=30)
# Should be able to reconnect to set again.
time.sleep(2 * self.heartbeat_frequency)
find_one(read_preference=SECONDARY)
def test_read_preference(self):
# This is long, but we put all the tests in one function to save time
# on setUp, which takes about 30 seconds to bring up a replica set.
# We pass through four states:
#
# 1. A primary and two secondaries
# 2. Primary down
# 3. Primary up, one secondary down
# 4. Primary up, all secondaries down
#
# For each state, we verify the behavior of PRIMARY,
# PRIMARY_PREFERRED, SECONDARY, SECONDARY_PREFERRED, and NEAREST
c = ReplicaSetConnection(
self.seed, replicaSet=self.name, use_greenlets=use_greenlets,
auto_start_request=False)
def assertReadFrom(member, *args, **kwargs):
utils.assertReadFrom(self, c, member, *args, **kwargs)
def assertReadFromAll(members, *args, **kwargs):
utils.assertReadFromAll(self, c, members, *args, **kwargs)
def unpartition_node(node):
host, port = node
return '%s:%s' % (host, port)
# To make the code terser, copy modes and hosts into local scope
PRIMARY = ReadPreference.PRIMARY
PRIMARY_PREFERRED = ReadPreference.PRIMARY_PREFERRED
SECONDARY = ReadPreference.SECONDARY
SECONDARY_PREFERRED = ReadPreference.SECONDARY_PREFERRED
NEAREST = ReadPreference.NEAREST
primary = self.primary
secondary = self.secondary
other_secondary = self.other_secondary
bad_tag = {'bad': 'tag'}
# 1. THREE MEMBERS UP -------------------------------------------------
# PRIMARY
assertReadFrom(primary, PRIMARY)
# PRIMARY_PREFERRED
# Trivial: mode and tags both match
assertReadFrom(primary, PRIMARY_PREFERRED, self.primary_dc)
# Secondary matches but not primary, choose primary
assertReadFrom(primary, PRIMARY_PREFERRED, self.secondary_dc)
# Chooses primary, ignoring tag sets
assertReadFrom(primary, PRIMARY_PREFERRED, self.primary_dc)
# Chooses primary, ignoring tag sets
assertReadFrom(primary, PRIMARY_PREFERRED, bad_tag)
assertReadFrom(primary, PRIMARY_PREFERRED, [bad_tag, {}])
# SECONDARY
assertReadFromAll([secondary, other_secondary], SECONDARY)
# SECONDARY_PREFERRED
assertReadFromAll([secondary, other_secondary], SECONDARY_PREFERRED)
# Multiple tags
assertReadFrom(secondary, SECONDARY_PREFERRED, self.secondary_tags)
# Fall back to primary if it's the only one matching the tags
assertReadFrom(primary, SECONDARY_PREFERRED, {'name': 'primary'})
# No matching secondaries
assertReadFrom(primary, SECONDARY_PREFERRED, bad_tag)
# Fall back from non-matching tag set to matching set
assertReadFromAll([secondary, other_secondary],
SECONDARY_PREFERRED, [bad_tag, {}])
assertReadFrom(other_secondary,
SECONDARY_PREFERRED, [bad_tag, {'dc': 'ny'}])
# NEAREST
self.clear_ping_times()
assertReadFromAll([primary, secondary, other_secondary], NEAREST)
assertReadFromAll([primary, other_secondary],
NEAREST, [bad_tag, {'dc': 'ny'}])
self.set_ping_time(primary, 0)
self.set_ping_time(secondary, .03) # 30 ms
self.set_ping_time(other_secondary, 10)
# Nearest member, no tags
assertReadFrom(primary, NEAREST)
# Tags override nearness
assertReadFrom(primary, NEAREST, {'name': 'primary'})
assertReadFrom(secondary, NEAREST, self.secondary_dc)
# Make secondary fast
self.set_ping_time(primary, .03) # 30 ms
self.set_ping_time(secondary, 0)
assertReadFrom(secondary, NEAREST)
# Other secondary fast
self.set_ping_time(secondary, 10)
self.set_ping_time(other_secondary, 0)
assertReadFrom(other_secondary, NEAREST)
# High secondaryAcceptableLatencyMS, should read from all members
assertReadFromAll(
[primary, secondary, other_secondary],
NEAREST, secondary_acceptable_latency_ms=1000*1000)
self.clear_ping_times()
assertReadFromAll([primary, other_secondary], NEAREST, [{'dc': 'ny'}])
# 2. PRIMARY DOWN -----------------------------------------------------
killed = ha_tools.kill_primary()
# Let monitor notice primary's gone
sleep(2 * MONITOR_INTERVAL)
# PRIMARY
assertReadFrom(None, PRIMARY)
# PRIMARY_PREFERRED
# No primary, choose matching secondary
assertReadFromAll([secondary, other_secondary], PRIMARY_PREFERRED)
assertReadFrom(secondary, PRIMARY_PREFERRED, {'name': 'secondary'})
# No primary or matching secondary
assertReadFrom(None, PRIMARY_PREFERRED, bad_tag)
# SECONDARY
assertReadFromAll([secondary, other_secondary], SECONDARY)
# Only primary matches
assertReadFrom(None, SECONDARY, {'name': 'primary'})
# No matching secondaries
assertReadFrom(None, SECONDARY, bad_tag)
# SECONDARY_PREFERRED
assertReadFromAll([secondary, other_secondary], SECONDARY_PREFERRED)
# Mode and tags both match
assertReadFrom(secondary, SECONDARY_PREFERRED, {'name': 'secondary'})
# NEAREST
self.clear_ping_times()
assertReadFromAll([secondary, other_secondary], NEAREST)
# 3. PRIMARY UP, ONE SECONDARY DOWN -----------------------------------
ha_tools.restart_members([killed])
for _ in range(30):
if ha_tools.get_primary():
break
sleep(1)
else:
self.fail("Primary didn't come back up")
ha_tools.kill_members([unpartition_node(secondary)], 2)
self.assertTrue(Connection(
unpartition_node(primary), use_greenlets=use_greenlets,
slave_okay=True
).admin.command('ismaster')['ismaster'])
sleep(2 * MONITOR_INTERVAL)
# PRIMARY
assertReadFrom(primary, PRIMARY)
# PRIMARY_PREFERRED
assertReadFrom(primary, PRIMARY_PREFERRED)
# SECONDARY
assertReadFrom(other_secondary, SECONDARY)
assertReadFrom(other_secondary, SECONDARY, self.other_secondary_dc)
# Only the down secondary matches
assertReadFrom(None, SECONDARY, {'name': 'secondary'})
# SECONDARY_PREFERRED
assertReadFrom(other_secondary, SECONDARY_PREFERRED)
assertReadFrom(
other_secondary, SECONDARY_PREFERRED, self.other_secondary_dc)
# The secondary matching the tag is down, use primary
assertReadFrom(primary, SECONDARY_PREFERRED, {'name': 'secondary'})
# NEAREST
assertReadFromAll([primary, other_secondary], NEAREST)
assertReadFrom(other_secondary, NEAREST, {'name': 'other_secondary'})
assertReadFrom(primary, NEAREST, {'name': 'primary'})
# 4. PRIMARY UP, ALL SECONDARIES DOWN ---------------------------------
ha_tools.kill_members([unpartition_node(other_secondary)], 2)
self.assertTrue(Connection(
unpartition_node(primary), use_greenlets=use_greenlets,
slave_okay=True
).admin.command('ismaster')['ismaster'])
# PRIMARY
assertReadFrom(primary, PRIMARY)
# PRIMARY_PREFERRED
assertReadFrom(primary, PRIMARY_PREFERRED)
assertReadFrom(primary, PRIMARY_PREFERRED, self.secondary_dc)
# SECONDARY
assertReadFrom(None, SECONDARY)
assertReadFrom(None, SECONDARY, self.other_secondary_dc)
assertReadFrom(None, SECONDARY, {'dc': 'ny'})
# SECONDARY_PREFERRED
assertReadFrom(primary, SECONDARY_PREFERRED)
assertReadFrom(primary, SECONDARY_PREFERRED, self.secondary_dc)
assertReadFrom(primary, SECONDARY_PREFERRED, {'name': 'secondary'})
assertReadFrom(primary, SECONDARY_PREFERRED, {'dc': 'ny'})
# NEAREST
assertReadFrom(primary, NEAREST)
assertReadFrom(None, NEAREST, self.secondary_dc)
assertReadFrom(None, NEAREST, {'name': 'secondary'})
# Even if primary's slow, still read from it
self.set_ping_time(primary, 100)
assertReadFrom(primary, NEAREST)
assertReadFrom(None, NEAREST, self.secondary_dc)
self.clear_ping_times()
def test_read_preference(self):
# We pass through four states:
#
# 1. A primary and two secondaries
# 2. Primary down
# 3. Primary up, one secondary down
# 4. Primary up, all secondaries down
#
# For each state, we verify the behavior of PRIMARY,
# PRIMARY_PREFERRED, SECONDARY, SECONDARY_PREFERRED, and NEAREST
c = MongoReplicaSetClient(self.seed,
replicaSet=self.name,
use_greenlets=use_greenlets)
def assertReadFrom(member, *args, **kwargs):
utils.assertReadFrom(self, c, member, *args, **kwargs)
def assertReadFromAll(members, *args, **kwargs):
utils.assertReadFromAll(self, c, members, *args, **kwargs)
def unpartition_node(node):
host, port = node
return '%s:%s' % (host, port)
# To make the code terser, copy hosts into local scope
primary = self.primary
secondary = self.secondary
other_secondary = self.other_secondary
bad_tag = {'bad': 'tag'}
# 1. THREE MEMBERS UP -------------------------------------------------
# PRIMARY
assertReadFrom(primary, PRIMARY)
# PRIMARY_PREFERRED
# Trivial: mode and tags both match
assertReadFrom(primary, PRIMARY_PREFERRED, self.primary_dc)
# Secondary matches but not primary, choose primary
assertReadFrom(primary, PRIMARY_PREFERRED, self.secondary_dc)
# Chooses primary, ignoring tag sets
assertReadFrom(primary, PRIMARY_PREFERRED, self.primary_dc)
# Chooses primary, ignoring tag sets
assertReadFrom(primary, PRIMARY_PREFERRED, bad_tag)
assertReadFrom(primary, PRIMARY_PREFERRED, [bad_tag, {}])
# SECONDARY
assertReadFromAll([secondary, other_secondary], SECONDARY)
# SECONDARY_PREFERRED
assertReadFromAll([secondary, other_secondary], SECONDARY_PREFERRED)
# Multiple tags
assertReadFrom(secondary, SECONDARY_PREFERRED, self.secondary_tags)
# Fall back to primary if it's the only one matching the tags
assertReadFrom(primary, SECONDARY_PREFERRED, {'name': 'primary'})
# No matching secondaries
assertReadFrom(primary, SECONDARY_PREFERRED, bad_tag)
# Fall back from non-matching tag set to matching set
assertReadFromAll([secondary, other_secondary], SECONDARY_PREFERRED,
[bad_tag, {}])
assertReadFrom(other_secondary, SECONDARY_PREFERRED,
[bad_tag, {
'dc': 'ny'
}])
# NEAREST
self.clear_ping_times()
assertReadFromAll([primary, secondary, other_secondary], NEAREST)
assertReadFromAll([primary, other_secondary], NEAREST,
[bad_tag, {
'dc': 'ny'
}])
self.set_ping_time(primary, 0)
self.set_ping_time(secondary, .03) # 30 ms
self.set_ping_time(other_secondary, 10)
# Nearest member, no tags
assertReadFrom(primary, NEAREST)
# Tags override nearness
assertReadFrom(primary, NEAREST, {'name': 'primary'})
assertReadFrom(secondary, NEAREST, self.secondary_dc)
# Make secondary fast
self.set_ping_time(primary, .03) # 30 ms
self.set_ping_time(secondary, 0)
assertReadFrom(secondary, NEAREST)
# Other secondary fast
self.set_ping_time(secondary, 10)
self.set_ping_time(other_secondary, 0)
assertReadFrom(other_secondary, NEAREST)
# High secondaryAcceptableLatencyMS, should read from all members
assertReadFromAll([primary, secondary, other_secondary],
NEAREST,
secondary_acceptable_latency_ms=1000 * 1000)
self.clear_ping_times()
assertReadFromAll([primary, other_secondary], NEAREST, [{'dc': 'ny'}])
# 2. PRIMARY DOWN -----------------------------------------------------
killed = ha_tools.kill_primary()
# Let monitor notice primary's gone
sleep(2 * MONITOR_INTERVAL)
# PRIMARY
assertReadFrom(None, PRIMARY)
# PRIMARY_PREFERRED
# No primary, choose matching secondary
assertReadFromAll([secondary, other_secondary], PRIMARY_PREFERRED)
assertReadFrom(secondary, PRIMARY_PREFERRED, {'name': 'secondary'})
# No primary or matching secondary
assertReadFrom(None, PRIMARY_PREFERRED, bad_tag)
# SECONDARY
assertReadFromAll([secondary, other_secondary], SECONDARY)
# Only primary matches
assertReadFrom(None, SECONDARY, {'name': 'primary'})
# No matching secondaries
assertReadFrom(None, SECONDARY, bad_tag)
# SECONDARY_PREFERRED
assertReadFromAll([secondary, other_secondary], SECONDARY_PREFERRED)
# Mode and tags both match
assertReadFrom(secondary, SECONDARY_PREFERRED, {'name': 'secondary'})
# NEAREST
self.clear_ping_times()
assertReadFromAll([secondary, other_secondary], NEAREST)
# 3. PRIMARY UP, ONE SECONDARY DOWN -----------------------------------
ha_tools.restart_members([killed])
for _ in range(30):
if ha_tools.get_primary():
break
sleep(1)
else:
self.fail("Primary didn't come back up")
ha_tools.kill_members([unpartition_node(secondary)], 2)
self.assertTrue(
MongoClient(unpartition_node(primary),
use_greenlets=use_greenlets,
read_preference=PRIMARY_PREFERRED).admin.command(
'ismaster')['ismaster'])
sleep(2 * MONITOR_INTERVAL)
# PRIMARY
assertReadFrom(primary, PRIMARY)
# PRIMARY_PREFERRED
assertReadFrom(primary, PRIMARY_PREFERRED)
# SECONDARY
assertReadFrom(other_secondary, SECONDARY)
assertReadFrom(other_secondary, SECONDARY, self.other_secondary_dc)
# Only the down secondary matches
assertReadFrom(None, SECONDARY, {'name': 'secondary'})
# SECONDARY_PREFERRED
assertReadFrom(other_secondary, SECONDARY_PREFERRED)
assertReadFrom(other_secondary, SECONDARY_PREFERRED,
self.other_secondary_dc)
# The secondary matching the tag is down, use primary
assertReadFrom(primary, SECONDARY_PREFERRED, {'name': 'secondary'})
# NEAREST
assertReadFromAll([primary, other_secondary], NEAREST)
assertReadFrom(other_secondary, NEAREST, {'name': 'other_secondary'})
assertReadFrom(primary, NEAREST, {'name': 'primary'})
# 4. PRIMARY UP, ALL SECONDARIES DOWN ---------------------------------
ha_tools.kill_members([unpartition_node(other_secondary)], 2)
self.assertTrue(
MongoClient(unpartition_node(primary),
use_greenlets=use_greenlets,
read_preference=PRIMARY_PREFERRED).admin.command(
'ismaster')['ismaster'])
# PRIMARY
assertReadFrom(primary, PRIMARY)
# PRIMARY_PREFERRED
assertReadFrom(primary, PRIMARY_PREFERRED)
assertReadFrom(primary, PRIMARY_PREFERRED, self.secondary_dc)
# SECONDARY
assertReadFrom(None, SECONDARY)
assertReadFrom(None, SECONDARY, self.other_secondary_dc)
assertReadFrom(None, SECONDARY, {'dc': 'ny'})
# SECONDARY_PREFERRED
assertReadFrom(primary, SECONDARY_PREFERRED)
assertReadFrom(primary, SECONDARY_PREFERRED, self.secondary_dc)
assertReadFrom(primary, SECONDARY_PREFERRED, {'name': 'secondary'})
assertReadFrom(primary, SECONDARY_PREFERRED, {'dc': 'ny'})
# NEAREST
assertReadFrom(primary, NEAREST)
assertReadFrom(None, NEAREST, self.secondary_dc)
assertReadFrom(None, NEAREST, {'name': 'secondary'})
# Even if primary's slow, still read from it
self.set_ping_time(primary, 100)
assertReadFrom(primary, NEAREST)
assertReadFrom(None, NEAREST, self.secondary_dc)
self.clear_ping_times()
