def __del_server(self, server_to_del):
# backup data
redis = redis_mgmt.Redis( server_to_del['id'] )
ret = redis.connect( server_to_del['ip'], server_to_del['redis_port'] )
self.assertEquals( ret, 0, 'failed : connect to smr%d(%s:%d)' % (server_to_del['id'], server_to_del['ip'], server_to_del['redis_port']) )
# bgsave
ret = util.bgsave(server_to_del)
self.assertTrue(ret, 'failed to bgsave. pgs%d' % server_to_del['id'])
# detach pgs from cluster
cmd = 'pgs_leave %s %d\r\n' % (server_to_del['cluster_name'], server_to_del['id'])
ret = util.cm_command( self.leader_cm['ip'], self.leader_cm['cm_port'], cmd )
jobj = json.loads(ret)
self.assertEqual( jobj['msg'], '+OK', 'failed : cmd="%s", reply="%s"' % (cmd[:-2], ret[:-2]) )
util.log( 'succeeded : cmd="%s", reply="%s"' % (cmd[:-2], ret[:-2]) )
# check if pgs is removed
success = False
for try_cnt in range( 10 ):
redis = redis_mgmt.Redis( server_to_del['id'] )
ret = redis.connect( server_to_del['ip'], server_to_del['redis_port'] )
self.assertEquals( ret, 0, 'failed : connect to smr%d(%s:%d)' % (server_to_del['id'], server_to_del['ip'], server_to_del['redis_port']) )
util.log( 'succeeded : connect to smr%d(%s:%d)' % (server_to_del['id'], server_to_del['ip'], server_to_del['redis_port']) )
redis.write( 'info stats\r\n' )
for i in range( 6 ):
redis.read_until( '\r\n' )
res = redis.read_until( '\r\n' )
self.assertNotEqual( res, '', 'failed : get reply of "info stats" from redis%d(%s:%d)' % (server_to_del['id'], server_to_del['ip'], server_to_del['redis_port']) )
util.log( 'succeeded : get reply of "info stats" from redis%d(%s:%d), reply="%s"' % (server_to_del['id'], server_to_del['ip'], server_to_del['redis_port'], res[:-2]) )
no = int( res.split(':')[1] )
if no <= 100:
success = True
break
time.sleep( 1 )
self.assertEquals( success, True, 'failed : pgs does not removed.' )
util.log( 'succeeded : pgs is removed' )
# change state of pgs to lconn
cmd = 'pgs_lconn %s %d\r\n' % (server_to_del['cluster_name'], server_to_del['id'])
ret = util.cm_command( self.leader_cm['ip'], self.leader_cm['cm_port'], cmd )
jobj = json.loads(ret)
self.assertEqual( jobj['msg'], '+OK', 'failed : cmd="%s", reply="%s"' % (cmd[:-2], ret[:-2]) )
util.log( 'succeeded : cmd="%s", reply="%s"' % (cmd[:-2], ret[:-2]) )
# shutdown
ret = testbase.request_to_shutdown_smr( server_to_del )
self.assertEqual( ret, 0, 'failed : shutdown smr. id:%d' % server_to_del['id'] )
ret = testbase.request_to_shutdown_redis( server_to_del )
self.assertEquals( ret, 0, 'failed : shutdown redis. id:%d' % server_to_del['id'] )
util.log('succeeded : shutdown pgs%d.' % server_to_del['id'] )
# delete pgs from cluster
cmd = 'pgs_del %s %d\r\n' % (server_to_del['cluster_name'], server_to_del['id'])
ret = util.cm_command( self.leader_cm['ip'], self.leader_cm['cm_port'], cmd )
jobj = json.loads(ret)
self.assertEqual( jobj['msg'], '+OK', 'failed : cmd="%s", reply="%s"' % (cmd[:-2], ret[:-2]) )
util.log( 'succeeded : cmd="%s", reply="%s"' % (cmd[:-2], ret[:-2]) )
def __del_server(self, server_to_del):
# backup data
redis = redis_mgmt.Redis(server_to_del['id'])
ret = redis.connect(server_to_del['ip'], server_to_del['redis_port'])
self.assertEquals(
ret, 0, 'failed : connect to smr%d(%s:%d)' %
(server_to_del['id'], server_to_del['ip'],
server_to_del['redis_port']))
# bgsave
ret = util.bgsave(server_to_del)
self.assertTrue(ret, 'failed to bgsave. pgs%d' % server_to_del['id'])
# detach pgs from cluster
cmd = 'pgs_leave %s %d\r\n' % (server_to_del['cluster_name'],
server_to_del['id'])
ret = util.cm_command(self.leader_cm['ip'], self.leader_cm['cm_port'],
cmd)
jobj = json.loads(ret)
self.assertEqual(
jobj['msg'], '+OK',
'failed : cmd="%s", reply="%s"' % (cmd[:-2], ret[:-2]))
util.log('succeeded : cmd="%s", reply="%s"' % (cmd[:-2], ret[:-2]))
r = util.get_role_of_server(server_to_del)
# If quorum of left master is larger than 1, info command will be blocked.
if r != c.ROLE_MASTER:
# check if pgs is removed
success = False
for try_cnt in range(10):
redis = redis_mgmt.Redis(server_to_del['id'])
ret = redis.connect(server_to_del['ip'],
server_to_del['redis_port'])
self.assertEquals(
ret, 0, 'failed : connect to smr%d(%s:%d)' %
(server_to_del['id'], server_to_del['ip'],
server_to_del['redis_port']))
util.log('succeeded : connect to smr%d(%s:%d)' %
(server_to_del['id'], server_to_del['ip'],
server_to_del['redis_port']))
redis.write('info stats\r\n')
for i in range(6):
redis.read_until('\r\n')
res = redis.read_until('\r\n')
self.assertNotEqual(
res, '',
'failed : get reply of "info stats" from redis%d(%s:%d)' %
(server_to_del['id'], server_to_del['ip'],
server_to_del['redis_port']))
util.log(
'succeeded : get reply of "info stats" from redis%d(%s:%d), reply="%s"'
% (server_to_del['id'], server_to_del['ip'],
server_to_del['redis_port'], res[:-2]))
no = int(res.split(':')[1])
if no <= 100:
success = True
break
time.sleep(1)
self.assertEquals(success, True, 'failed : pgs does not removed.')
util.log('pgs is removed')
# change state of pgs to lconn
cmd = 'pgs_lconn %s %d\r\n' % (server_to_del['cluster_name'],
server_to_del['id'])
ret = util.cm_command(self.leader_cm['ip'], self.leader_cm['cm_port'],
cmd)
jobj = json.loads(ret)
self.assertEqual(
jobj['msg'], '+OK',
'failed : cmd="%s", reply="%s"' % (cmd[:-2], ret[:-2]))
util.log('succeeded : cmd="%s", reply="%s"' % (cmd[:-2], ret[:-2]))
# shutdown
ret = testbase.request_to_shutdown_smr(server_to_del)
self.assertEqual(ret, 0,
'failed : shutdown smr. id:%d' % server_to_del['id'])
ret = testbase.request_to_shutdown_redis(server_to_del)
self.assertEquals(
ret, 0, 'failed : shutdown redis. id:%d' % server_to_del['id'])
util.log('succeeded : shutdown pgs%d.' % server_to_del['id'])
# delete pgs from cluster
cmd = 'pgs_del %s %d\r\n' % (server_to_del['cluster_name'],
server_to_del['id'])
ret = util.cm_command(self.leader_cm['ip'], self.leader_cm['cm_port'],
cmd)
jobj = json.loads(ret)
self.assertEqual(
jobj['msg'], '+OK',
'failed : cmd="%s", reply="%s"' % (cmd[:-2], ret[:-2]))
util.log('succeeded : cmd="%s", reply="%s"' % (cmd[:-2], ret[:-2]))
def test_5_transfer_pgs_to_another_machine(self):
util.print_frame()
self.load_gen_list = {}
# get gateway info
ip, port = util.get_rand_gateway(self.cluster)
gw = gateway_mgmt.Gateway(self.cluster['servers'][0]['id'])
ret = gw.connect(ip, port)
self.assertEqual(ret, 0,
'failed to connect to gateway, %s:%d' % (ip, port))
# incrase master generation number
util.log('failover in order to increase master generation number.')
max = 0
for i in range(5):
key_base = 'key'
for i in range(max, max + 10000):
cmd = 'set %s%d %d\r\n' % (key_base, i, i)
gw.write(cmd)
res = gw.read_until('\r\n')
self.assertEquals(res, '+OK\r\n')
max = max + 10000
m = util.get_server_by_role(self.cluster['servers'], 'master')
util.log('failover pgs%d' % m['id'])
ret = util.failover(m, self.leader_cm)
self.assertTrue(ret, 'failed to failover pgs%d' % m['id'])
# start load generator
util.log("start load_generator")
for i in range(self.max_load_generator):
ip, port = util.get_rand_gateway(self.cluster)
self.load_gen_list[i] = load_generator.LoadGenerator(i, ip, port)
self.load_gen_list[i].start()
time.sleep(5) # generate load for 5 sec
util.log("started load_generator")
m, s1, s2 = util.get_mss(self.cluster)
servers = [m, s1, s2]
# bgsave
for s in servers:
ret = util.bgsave(s)
self.assertTrue(ret, 'failed to bgsave. pgs%d' % s['id'])
new_servers = [config.server4, config.server5]
# add new slaves
for s in new_servers:
util.log('delete pgs%d`s check point.' % s['id'])
util.del_dumprdb(s['id'])
ret = util.cluster_util_getdump(s['id'], m['ip'], m['redis_port'],
'dump.rdb', 0, 8191)
self.assertEqual(
True, ret,
'failed : util.cluster_util_getdump returns false, src=%s:%d dest_pgsid=%d'
% (m['ip'], m['redis_port'], s['id']))
ret = util.install_pgs(self.cluster,
s,
self.leader_cm,
0,
rm_ckpt=False)
self.assertEqual(
True, ret,
'failed : util.pgs_add returns false, pgsid=%d' % s['id'])
util.log('succeeeded : add a new slave, pgsid=%d' % s['id'])
# check consistency
ok = True
for j in range(self.max_load_generator):
if self.load_gen_list[j].isConsistent() == False:
ok = False
break
if not ok:
break
for server_to_del in servers:
for s in servers:
util.pingpong(s['ip'], s['smr_mgmt_port'])
for s in new_servers:
util.pingpong(s['ip'], s['smr_mgmt_port'])
self.__del_server(server_to_del)
util.log('succeeded : delete pgs%d' % server_to_del['id'])
new_m = util.get_server_by_role(new_servers, 'master')
new_s = util.get_server_by_role(new_servers, 'slave')
self.assertNotEqual(new_m, None, 'master is None.')
self.assertNotEqual(new_s, None, 'slave is None.')
for s in new_servers:
util.pingpong(s['ip'], s['smr_mgmt_port'])
time.sleep(5) # generate load for 5 sec
# check consistency of load_generator
for i in range(self.max_load_generator):
self.load_gen_list[i].quit()
for i in range(self.max_load_generator):
self.load_gen_list[i].join()
self.assertTrue(self.load_gen_list[i].isConsistent(),
'Inconsistent after migration')
self.load_gen_list.pop(i, None)
# Go back to initial configuration
# recover pgs
for s in servers:
self.assertTrue(
util.install_pgs(self.cluster,
s,
self.leader_cm,
rm_ckpt=False),
'failed to recover pgs. (install_pgs)')
# cleanup new slaves
for s in new_servers:
self.assertTrue(
util.uninstall_pgs(self.cluster, s, self.leader_cm),
'failed to cleanup pgs. (uninstall_pgs)')
def test_4_role_change_with_failover(self):
util.print_frame()
loop_cnt = 0
while loop_cnt < 5:
util.log('')
util.log('Loop:%d' % loop_cnt)
util.log("States (before role change)")
util.log_server_state(self.cluster)
target = random.choice(self.cluster['servers'])
# bgsave
ret = util.bgsave(target)
self.assertTrue(ret, 'failed to bgsave. pgs:%d' % target['id'])
# shutdown
util.log('shutdown pgs%d(%s:%d)' %
(target['id'], target['ip'], target['smr_base_port']))
ret = testbase.request_to_shutdown_smr(target)
self.assertEqual(ret, 0, 'failed to shutdown smr')
ret = testbase.request_to_shutdown_redis(target)
self.assertEquals(ret, 0, 'failed to shutdown redis')
r = ''
expected = 'N'
for fc_cnt in xrange(20):
r = util.get_smr_role_of_cm(target, self.leader_cm)
if r == expected:
break
time.sleep(0.5)
self.assertEquals(r, expected, 'failure detection error.')
running_servers = []
for s in self.cluster['servers']:
if s != target:
running_servers.append(s)
# Get old timestamp
old_timestamps = {}
for s in running_servers:
ts = util.get_timestamp_of_pgs(s)
old_timestamps[s['id']] = ts
# Start load generator
self.load_gen_list = {}
util.log('start load generator')
for i in range(self.max_load_generator):
ip, port = util.get_rand_gateway(self.cluster)
load_gen = load_generator.LoadGenerator(i, ip, port)
load_gen.start()
self.load_gen_list[i] = load_gen
m, s1, s2 = util.get_mss(self.cluster)
self.assertNotEqual(m, None, 'master is None.')
self.assertNotEqual(s1, None, 'slave1 is None.')
# Role change
master_id = util.role_change(self.leader_cm,
self.cluster['cluster_name'],
s1['id'])
self.assertNotEqual(master_id, -1, 'role_change failed')
util.log("States (after role change)")
util.log_server_state(self.cluster)
# Check - get new timestamp
new_timestamps = {}
for s in running_servers:
ts = util.get_timestamp_of_pgs(s)
new_timestamps[s['id']] = ts
# Check - compare old timestamps and new timestamps
for s in running_servers:
old_ts = old_timestamps[s['id']]
new_ts = new_timestamps[s['id']]
self.assertNotEqual(
old_ts, new_ts,
'Timestamp of a running server has not changed. %d->%d' %
(old_ts, new_ts))
# Check quorum
m = self.cluster['servers'][master_id]
expected = 1
ok = self.__check_quorum(m, expected)
self.assertTrue(
ok, 'unexpected quorum(after role change). expected:%s' %
(expected))
# recovery
util.log('recovery pgs%d(%s:%d)' %
(target['id'], target['ip'], target['smr_base_port']))
ret = testbase.request_to_start_smr(target)
self.assertEqual(ret, 0, 'failed to start smr')
util.log('start smr-replicator done')
ret = testbase.request_to_start_redis(target, 60)
self.assertEqual(ret, 0, 'failed to start redis')
util.log('start redis-arc done')
ret = testbase.wait_until_finished_to_set_up_role(target,
max_try=300)
self.assertEquals(
ret, 0, 'failed to role change. smr_id:%d' % (target['id']))
util.log("States (after recovery)")
util.log_server_state(self.cluster)
# Check cluster state
normal_state = False
for i in xrange(20):
normal_state = util.check_cluster(self.cluster['cluster_name'],
self.leader_cm['ip'],
self.leader_cm['cm_port'],
check_quorum=True)
if normal_state:
break
time.sleep(0.5)
self.assertTrue(normal_state, "Unstable cluster state")
# Check quorum
expected = 2
ok = self.__check_quorum(m, expected)
self.assertTrue(
ok,
'unexpected quorum(after recovery). expected:%s' % (expected))
# Cheeck Consistency
util.log('stop load generator')
for i in range(self.max_load_generator):
self.load_gen_list[i].quit()
for i in range(self.max_load_generator):
self.load_gen_list[i].join()
self.assertTrue(self.load_gen_list[i].isConsistent(),
'Inconsistent after migration')
self.load_gen_list.pop(i, None)
loop_cnt += 1
return 0
def test_delete_smrlog_after_scaleout(self):
util.print_frame()
# start load generator
util.log("start load_generator")
for i in range(self.max_load_generator):
ip, port = util.get_rand_gateway(self.cluster)
self.load_gen_thrd_list[i] = load_generator.LoadGenerator(i, ip, port)
self.load_gen_thrd_list[i].start()
time.sleep(5) # generate load for 5 sec
util.log("started load_generator")
# servers for scale out
servers = [config.server4, config.server5, config.server6]
leader_cm = self.cluster['servers'][0]
# Scale out
cluster = config.clusters[0]
ret = util.pg_add(cluster, servers, leader_cm)
self.assertEqual(True, ret, 'Scale out fail. util.pg_add returns false')
time.sleep(5)
# pg0 -> pg1
cluster = config.clusters[1]
ret = util.migration(cluster, 0, 1, 8000, 8191, 40000)
self.assertEqual(True, ret, 'Migration Fail 0 -> 1')
# get log file
old_logs = {}
for s in config.clusters[0]['servers']:
parent_dir, log_dir = util.smr_log_dir(s['id'])
path = '%s/%s' % (parent_dir, log_dir)
old_logs[s['id']] = util.ls(path)
# bgsave in order to make smrlogs deleted.
for s in config.clusters[0]['servers']:
bgsave_ret = util.bgsave(s)
self.assertTrue(bgsave_ret, 'failed to bgsave. pgs%d' % s['id'])
util.log('bgsave pgs%d is done.')
# check consistency
ok = True
for j in range(len(self.load_gen_thrd_list)):
self.assertTrue(self.load_gen_thrd_list[j].isConsistent(),
'Inconsistent after migration')
# is smr-replicator delete smrlogs?
i = 0
while i < 20:
i += 1
# get current log files
cur_logs = {}
for s in config.clusters[0]['servers']:
parent_dir, log_dir = util.smr_log_dir(s['id'])
path = '%s/%s' % (parent_dir, log_dir)
cur_logs[s['id']] = util.ls(path)
# compare old and new
temp_old_logs = copy.deepcopy(old_logs)
for id, nl in cur_logs.items():
ol = temp_old_logs.get(id)
self.assertNotEqual(ol, None, "failed to check logfiles. old logs for smr-replicator '%d' is not exist." % id)
for log in nl:
if log in ol:
ol.remove(log)
ok = True
for id, ol in temp_old_logs.items():
if len(ol) == 0:
ok = False
util.log('Loop %d ---------------------------------------------------------' % i)
util.log('deleted smrlog files: %s' % util.json_to_str(temp_old_logs))
if ok:
break
time.sleep(10)
self.assertTrue(ok, 'smr-replicator does not delete smrlogs.')
util.log('smr-replicator deletes smrlogs.')
# check consistency of load_generator
for i in range(len(self.load_gen_thrd_list)):
self.load_gen_thrd_list[i].quit()
for i in range(len(self.load_gen_thrd_list)):
self.load_gen_thrd_list[i].join()
self.assertTrue(self.load_gen_thrd_list[i].isConsistent(), 'Inconsistent after migration')
def test_delete_smrlog_after_scaleout(self):
util.print_frame()
# start load generator
util.log("start load_generator")
for i in range(self.max_load_generator):
ip, port = util.get_rand_gateway(self.cluster)
self.load_gen_thrd_list[i] = load_generator.LoadGenerator(
i, ip, port)
self.load_gen_thrd_list[i].start()
time.sleep(5) # generate load for 5 sec
util.log("started load_generator")
# servers for scale out
servers = [config.server4, config.server5, config.server6]
leader_cm = self.cluster['servers'][0]
# Scale out
cluster = config.clusters[0]
ret = util.pg_add(cluster, servers, leader_cm)
self.assertEqual(True, ret,
'Scale out fail. util.pg_add returns false')
time.sleep(5)
# pg0 -> pg1
cluster = config.clusters[1]
ret = util.migration(cluster, 0, 1, 8000, 8191, 40000)
self.assertEqual(True, ret, 'Migration Fail 0 -> 1')
# get log file
old_logs = {}
for s in config.clusters[0]['servers']:
parent_dir, log_dir = util.smr_log_dir(s['id'])
path = '%s/%s' % (parent_dir, log_dir)
old_logs[s['id']] = util.ls(path)
# bgsave in order to make smrlogs deleted.
for s in config.clusters[0]['servers']:
bgsave_ret = util.bgsave(s)
self.assertTrue(bgsave_ret, 'failed to bgsave. pgs%d' % s['id'])
util.log('bgsave pgs%d is done.')
# check consistency
ok = True
for j in range(len(self.load_gen_thrd_list)):
self.assertTrue(self.load_gen_thrd_list[j].isConsistent(),
'Inconsistent after migration')
# is smr-replicator delete smrlogs?
i = 0
while i < 20:
i += 1
# get current log files
cur_logs = {}
for s in config.clusters[0]['servers']:
parent_dir, log_dir = util.smr_log_dir(s['id'])
path = '%s/%s' % (parent_dir, log_dir)
cur_logs[s['id']] = util.ls(path)
# compare old and new
temp_old_logs = copy.deepcopy(old_logs)
for id, nl in cur_logs.items():
ol = temp_old_logs.get(id)
self.assertNotEqual(
ol, None,
"failed to check logfiles. old logs for smr-replicator '%d' is not exist."
% id)
for log in nl:
if log in ol:
ol.remove(log)
ok = True
for id, ol in temp_old_logs.items():
if len(ol) == 0:
ok = False
util.log(
'Loop %d ---------------------------------------------------------'
% i)
util.log('deleted smrlog files: %s' %
util.json_to_str(temp_old_logs))
if ok:
break
time.sleep(10)
self.assertTrue(ok, 'smr-replicator does not delete smrlogs.')
util.log('smr-replicator deletes smrlogs.')
# check consistency of load_generator
for i in range(len(self.load_gen_thrd_list)):
self.load_gen_thrd_list[i].quit()
for i in range(len(self.load_gen_thrd_list)):
self.load_gen_thrd_list[i].join()
self.assertTrue(self.load_gen_thrd_list[i].isConsistent(),
'Inconsistent after migration')
def test_5_transfer_pgs_to_another_machine(self):
util.print_frame()
self.load_gen_list = {}
# get gateway info
ip, port = util.get_rand_gateway( self.cluster )
gw = gateway_mgmt.Gateway( self.cluster['servers'][0]['id'] )
ret = gw.connect( ip, port )
self.assertEqual( ret, 0, 'failed to connect to gateway, %s:%d' % (ip, port) )
# incrase master generation number
util.log('failover in order to increase master generation number.')
max = 0
for i in range(5):
key_base = 'key'
for i in range(max, max+10000):
cmd = 'set %s%d %d\r\n' % (key_base, i, i)
gw.write( cmd )
res = gw.read_until( '\r\n' )
self.assertEquals( res, '+OK\r\n' )
max = max + 10000
m = util.get_server_by_role(self.cluster['servers'], 'master')
util.log('failover pgs%d' % m['id'])
ret = util.failover(m, self.leader_cm)
self.assertTrue(ret, 'failed to failover pgs%d' % m['id'])
# start load generator
util.log("start load_generator")
for i in range(self.max_load_generator):
ip, port = util.get_rand_gateway(self.cluster)
self.load_gen_list[i] = load_generator.LoadGenerator(i, ip, port)
self.load_gen_list[i].start()
time.sleep(5) # generate load for 5 sec
util.log("started load_generator")
m, s1, s2 = util.get_mss(self.cluster)
servers = [m, s1, s2]
# bgsave
for s in servers:
ret = util.bgsave(s)
self.assertTrue(ret, 'failed to bgsave. pgs%d' % s['id'])
new_servers = [config.server4, config.server5]
# add new slaves
for s in new_servers:
util.log('delete pgs%d`s check point.' % s['id'])
util.del_dumprdb(s['id'])
ret = util.cluster_util_getdump(s['id'], m['ip'], m['redis_port'], 'dump.rdb', 0, 8191)
self.assertEqual(True, ret,
'failed : util.cluster_util_getdump returns false, src=%s:%d dest_pgsid=%d' % (
m['ip'], m['redis_port'], s['id']))
ret = util.pgs_add(self.cluster, s, self.leader_cm, 0, rm_ckpt=False)
self.assertEqual(True, ret, 'failed : util.pgs_add returns false, pgsid=%d' % s['id'])
util.log('succeeeded : add a new slave, pgsid=%d' % s['id'])
# check consistency
ok = True
for j in range(self.max_load_generator):
if self.load_gen_list[j].isConsistent() == False:
ok = False
break
if not ok:
break;
for server_to_del in servers:
for s in servers:
util.pingpong( s['ip'], s['smr_mgmt_port'] )
for s in new_servers:
util.pingpong( s['ip'], s['smr_mgmt_port'] )
self.__del_server(server_to_del)
util.log('succeeded : delete pgs%d' % server_to_del['id'])
new_m = util.get_server_by_role(new_servers, 'master')
new_s = util.get_server_by_role(new_servers, 'slave')
self.assertNotEqual( new_m, None, 'master is None.' )
self.assertNotEqual( new_s, None, 'slave is None.' )
for s in new_servers:
util.pingpong( s['ip'], s['smr_mgmt_port'] )
time.sleep(5) # generate load for 5 sec
# check consistency of load_generator
for i in range(self.max_load_generator):
self.load_gen_list[i].quit()
for i in range(self.max_load_generator):
self.load_gen_list[i].join()
self.assertTrue(self.load_gen_list[i].isConsistent(), 'Inconsistent after migration')
self.load_gen_list.pop(i, None)
def deprecated_test_5_PGS_commit_is_greater_than_PG_commit( self ):
util.print_frame()
# get gateway info
ip, port = util.get_rand_gateway( self.cluster )
gw = gateway_mgmt.Gateway( self.cluster['servers'][0]['id'] )
ret = gw.connect( ip, port )
self.assertEqual( ret, 0, 'failed to connect to gateway, %s:%d' % (ip, port) )
# initial data
util.put_some_data(self.cluster)
master, s1, s2 = util.get_mss(self.cluster)
server_to_join = [s1, s2]
# shutdown slaves
for i in range(0, 2):
ret = testbase.request_to_shutdown_smr( server_to_join[i] )
self.assertEqual( ret, 0, 'failed to shutdown smr%d' % server_to_join[i]['id'])
util.log('succeeded to shutdown smr%d' % server_to_join[i]['id'])
ret = testbase.request_to_shutdown_redis( server_to_join[i] )
self.assertEquals( ret, 0, 'failed to shutdown redis' )
util.log('succeeded to shutdown redis%d' % server_to_join[i]['id'])
# check state F
max_try = 20
expected = 'F'
for j in range( 0, max_try):
state = util.get_smr_state( server_to_join[i], self.leader_cm )
if expected == state:
break;
time.sleep( 1 )
self.assertEquals( expected , state,
'server%d - state:%s, expected:%s' % (server_to_join[i]['id'], state, expected) )
# put more data
util.put_some_data(self.cluster, 10, 256)
# bgsave
ret = util.bgsave(master)
self.assertTrue(ret, 'failed to bgsave. pgs%d' % master['id'])
# shutdown master
ret = testbase.request_to_shutdown_smr( master )
self.assertEqual( ret, 0, 'failed to shutdown smr' )
util.log('succeeded to shutdown master smr, id=%d' % master['id'])
ret = testbase.request_to_shutdown_redis( master )
self.assertEquals( ret, 0, 'failed to shutdown redis' )
util.log('succeeded to shutdown master redis, id=%d' % master['id'])
# check state F
max_try = 20
expected = 'F'
for i in range( 0, max_try):
state = util.get_smr_state( master, self.leader_cm )
if expected == state:
break;
time.sleep( 1 )
self.assertEquals( expected , state,
'server%d - state:%s, expected:%s' % (master['id'], state, expected) )
# recovery slaves
for i in range(0, 2):
ret = testbase.request_to_start_smr( server_to_join[i] )
self.assertEqual( ret, 0, 'failed to start smr' )
ret = testbase.request_to_start_redis( server_to_join[i] )
self.assertEqual( ret, 0, 'failed to start redis' )
ret = testbase.wait_until_finished_to_set_up_role( server_to_join[i], 10 )
self.assertEquals( ret, 0, 'failed to role change. smr_id:%d' % (server_to_join[i]['id']) )
# check state N
max_try = 20
expected = 'N'
for j in range( 0, max_try):
state = util.get_smr_state( server_to_join[i], self.leader_cm )
if expected == state:
break;
time.sleep( 1 )
role = util.get_role_of_server( server_to_join[i] )
self.assertEquals( expected , state,
'server%d - state:%s, expected:%s, role:%s' % (server_to_join[i]['id'], state, expected, role) )
# set value
s = random.choice(server_to_join)
redis = redis_mgmt.Redis( ['id'] )
ret = redis.connect( s['ip'], s['redis_port'] )
self.assertEquals( ret, 0, 'failed to connect to redis' )
key_base = 'key_test'
for i in range(0, 10000):
cmd = 'set %s%d %d\r\n' % (key_base, i, i)
redis.write( cmd )
res = redis.read_until( '\r\n' )
self.assertEquals( res, '+OK\r\n' )
redis.disconnect()
for i in range(0, 2):
redis = redis_mgmt.Redis( server_to_join[i]['id'] )
ret = redis.connect( server_to_join[i]['ip'], server_to_join[i]['redis_port'] )
self.assertEquals( ret, 0, 'failed to connect to redis' )
# check value
for j in range(0, 10000):
cmd = 'get %s%d\r\n' % (key_base, j)
redis.write( cmd )
redis.read_until( '\r\n' )
response = redis.read_until( '\r\n' )
self.assertEqual( response, '%d\r\n' % (j), 'inconsistent %s, %d' % (response[:-2], j) )
# try to recover master, but failed
ret = testbase.request_to_start_smr( master )
self.assertEqual( ret, 0, 'failed to start smr' )
ret = testbase.request_to_start_redis( master, False )
self.assertEqual( ret, 0, 'failed to start redis' )
max_try = 3
expected = 'N'
for i in range( 0, max_try):
state = util.get_smr_state( master, self.leader_cm )
if expected == state:
break;
time.sleep( 1 )
role = util.get_role_of_server( master )
self.assertNotEqual( expected, state,
'server%d - state:%s, expected:not %s, role:%s' % (master['id'], state, expected, role) )
util.log('success : the old master that has a greater commit-seq than the current master tried to join as a slave, but it is blocked successfully.')
gw.disconnect()
return 0
def test_4_role_change_with_failover(self):
util.print_frame()
loop_cnt = 0
while loop_cnt < 5:
util.log('')
util.log('Loop:%d' % loop_cnt)
util.log("States (before role change)")
util.log_server_state(self.cluster)
target = random.choice(self.cluster['servers'])
# bgsave
ret = util.bgsave(target)
self.assertTrue(ret, 'failed to bgsave. pgs:%d' % target['id'])
# shutdown
util.log('shutdown pgs%d(%s:%d)' % (target['id'], target['ip'], target['smr_base_port']))
ret = testbase.request_to_shutdown_smr( target )
self.assertEqual( ret, 0, 'failed to shutdown smr' )
ret = testbase.request_to_shutdown_redis( target )
self.assertEquals( ret, 0, 'failed to shutdown redis' )
running_servers = []
for s in self.cluster['servers']:
if s != target:
running_servers.append(s)
# Get old timestamp
old_timestamps = {}
for s in running_servers:
ts = util.get_timestamp_of_pgs(s)
old_timestamps[s['id']] = ts
# Start load generator
self.load_gen_list = {}
util.log('start load generator')
for i in range(self.max_load_generator):
ip, port = util.get_rand_gateway(self.cluster)
load_gen = load_generator.LoadGenerator(i, ip, port)
load_gen.start()
self.load_gen_list[i] = load_gen
m, s1, s2 = util.get_mss(self.cluster)
self.assertNotEqual(m, None, 'master is None.')
self.assertNotEqual(s1, None, 'slave1 is None.')
# Role change
master_id = util.role_change(self.leader_cm, self.cluster['cluster_name'], s1['id'])
self.assertNotEqual(master_id, -1, 'role_change failed')
util.log("States (after role change)")
util.log_server_state(self.cluster)
# Check - get new timestamp
new_timestamps= {}
for s in running_servers:
ts = util.get_timestamp_of_pgs( s )
new_timestamps[s['id']] = ts
# Check - compare old timestamps and new timestamps
for s in running_servers:
old_ts = old_timestamps[s['id']]
new_ts = new_timestamps[s['id']]
self.assertNotEqual(old_ts, new_ts, 'Timestamp of a running server has not changed. %d->%d' % (old_ts, new_ts))
# Check quorum
m = self.cluster['servers'][master_id]
expected = 1
ok = self.__check_quorum(m, expected)
self.assertTrue(ok, 'unexpected quorum(after role change). expected:%s' % (expected))
# recovery
util.log('recovery pgs%d(%s:%d)' % (target['id'], target['ip'], target['smr_base_port']))
ret = testbase.request_to_start_smr( target )
self.assertEqual( ret, 0, 'failed to start smr' )
util.log('start smr-replicator done')
ret = testbase.request_to_start_redis( target, 60 )
self.assertEqual( ret, 0, 'failed to start redis' )
util.log('start redis-arc done')
ret = testbase.wait_until_finished_to_set_up_role( target, max_try=300)
self.assertEquals( ret, 0, 'failed to role change. smr_id:%d' % (target['id']) )
util.log("States (after recovery)")
util.log_server_state(self.cluster)
# Check quorum
expected = 1
ok = self.__check_quorum(m, expected)
self.assertTrue(ok, 'unexpected quorum(after recovery). expected:%s' % (expected))
# Cheeck Consistency
util.log('stop load generator')
for i in range(self.max_load_generator):
self.load_gen_list[i].quit()
for i in range(self.max_load_generator):
self.load_gen_list[i].join()
self.assertTrue(self.load_gen_list[i].isConsistent(), 'Inconsistent after migration')
self.load_gen_list.pop(i, None)
loop_cnt += 1
return 0
def recovery_with_local_checkpoint_and_remote_log(self, role):
server = util.get_server_by_role(self.cluster['servers'], role)
# set initial data in order to make an elapsed time for bgsave longer
self.put_some_data()
# set value
ip, port = util.get_rand_gateway(self.cluster)
gw = gateway_mgmt.Gateway(server['id'])
ret = gw.connect(ip, port)
self.assertEqual(ret, 0,
'failed to connect to gateway, id:%d' % server['id'])
timestamp = {}
key_base = 'key0000000000111111111122222222223333333333444444444455555555556666666666777777777788888888889999999999'
for i in range(0, 50000):
timestamp[i] = time.time()
k = '%s_%d' % (key_base, i)
cmd = 'set %s %f\r\n' % (k, timestamp[i])
gw.write(cmd)
response = gw.read_until('\r\n')
self.assertNotEqual(response.find('+OK'), -1,
'failed to set key value through gateway')
# generate a check point
bgsave_ret = util.bgsave(server)
self.assertTrue(bgsave_ret, 'failed to bgsave. pgs%d' % server['id'])
# shutdown
ret = testbase.request_to_shutdown_smr(server)
self.assertEqual(ret, 0, 'failed to shutdown smr')
ret = testbase.request_to_shutdown_redis(server)
self.assertEqual(ret, 0, 'failed to shutdown redis')
util.log('succeeded : shutdown pgs%d' % (server['id']))
# delete smr_logs
ret = util.delete_smr_logs(server['id'])
self.assertEqual(ret, 0,
'failed to delete smr log, id:%d' % server['id'])
util.log('succeeded : delete replication logs')
time.sleep(5)
# set value
ret = gw.connect(ip, port)
self.assertEqual(ret, 0, 'failed to connect to gateway')
for i in range(50000, 100000):
timestamp[i] = time.time()
k = '%s_%d' % (key_base, i)
cmd = 'set %s %f\r\n' % (k, timestamp[i])
gw.write(cmd)
response = gw.read_until('\r\n')
self.assertNotEqual(response.find('+OK'), -1,
'failed to set key value through gateway')
# recovery
ret = testbase.request_to_start_smr(server)
self.assertEqual(ret, 0, 'failed to start smr')
ret = testbase.request_to_start_redis(server)
self.assertEqual(ret, 0, 'failed to start redis')
time.sleep(5)
ret = testbase.wait_until_finished_to_set_up_role(server)
self.assertEquals(ret, 0,
'failed to role change. smr_id:%d' % (server['id']))
util.log('succeeded : recover pgs%d' % server['id'])
# check value
recovered_redis = redis_mgmt.Redis(server['id'])
ret = recovered_redis.connect(server['ip'], server['redis_port'])
self.assertEquals(ret, 0, 'failed to connect to redis')
for i in range(0, 100000):
k = '%s_%d' % (key_base, i)
cmd = 'get %s\r\n' % (k)
recovered_redis.write(cmd)
recovered_redis.read_until('\r\n')
response = recovered_redis.read_until('\r\n')
self.assertEqual(response, '%f\r\n' % (timestamp[i]),
'inconsistent %s, %f' % (response, timestamp[i]))
def test_restart_recovery_with_remote_checkpoint_and_remote_log(self):
util.print_frame()
key_base = 'key'
target = util.get_server_by_role(self.cluster['servers'], 'slave')
master = util.get_server_by_role(self.cluster['servers'], 'master')
ip, port = util.get_rand_gateway(self.cluster)
gw = gateway_mgmt.Gateway(master['id'])
ret = gw.connect(ip, port)
self.assertEqual(ret, 0, 'failed to connect to gateway')
# set initial data in order to make an elapsed time for bgsave longer
self.put_some_data()
# generate some data
for i in range(0, 100):
key = '%s%d' % (key_base, i)
cmd = 'set %s %d\r\n' % (key, i)
gw.write(cmd)
res = gw.read_until('\r\n')
self.assertEquals(res, '+OK\r\n')
gw.disconnect()
# delete a local checkpoint
util.log('delete pgs%d`s check point.' % target['id'])
util.del_dumprdb(target['id'])
# generate a remote check point
bgsave_ret = util.bgsave(master)
self.assertTrue(bgsave_ret, 'failed to bgsave. pgs%d' % master['id'])
# shutdown
util.log('shutdown target')
ret = testbase.request_to_shutdown_smr(target)
self.assertEqual(ret, 0, 'failed to shutdown smr')
time.sleep(10)
# generate some data
ret = gw.connect(ip, port)
self.assertEqual(ret, 0, 'failed to connect to gateway')
for i in range(100, 200):
key = '%s%d' % (key_base, i)
cmd = 'set %s %d\r\n' % (key, i)
gw.write(cmd)
res = gw.read_until('\r\n')
self.assertEquals(res, '+OK\r\n')
gw.disconnect()
# recovery
util.log('recovery target')
ret = testbase.request_to_start_smr(target)
self.assertEqual(ret, 0, 'failed to start smr')
ret = testbase.request_to_start_redis(target)
self.assertEqual(ret, 0, 'failed to start redis')
time.sleep(5)
ret = testbase.wait_until_finished_to_set_up_role(target)
self.assertEquals(ret, 0,
'failed to role change. smr_id:%d' % (target['id']))
# check value
recovered_redis = redis_mgmt.Redis(target['id'])
ret = recovered_redis.connect(target['ip'], target['redis_port'])
self.assertEquals(ret, 0, 'failed to connect to redis')
for i in range(0, 200):
key = '%s%d' % (key_base, i)
cmd = 'get %s\r\n' % (key)
recovered_redis.write(cmd)
recovered_redis.read_until('\r\n')
response = recovered_redis.read_until('\r\n')
self.assertEqual(response, '%d\r\n' % i,
'inconsistent %s, %d' % (response, i))
def recovery_with_local_checkpoint_and_remote_log( self, role ):
server = util.get_server_by_role( self.cluster['servers'], role )
# set initial data in order to make an elapsed time for bgsave longer
self.put_some_data()
# set value
ip, port = util.get_rand_gateway( self.cluster )
gw = gateway_mgmt.Gateway( server['id'] )
ret = gw.connect( ip, port )
self.assertEqual( ret, 0, 'failed to connect to gateway, id:%d' % server['id'] )
timestamp = {}
key_base = 'key0000000000111111111122222222223333333333444444444455555555556666666666777777777788888888889999999999'
for i in range (0, 50000):
timestamp[i] = time.time()
k = '%s_%d' % (key_base, i)
cmd = 'set %s %f\r\n' % (k, timestamp[i])
gw.write( cmd )
response = gw.read_until( '\r\n' )
self.assertNotEqual( response.find( '+OK' ), -1, 'failed to set key value through gateway' )
# generate a check point
bgsave_ret = util.bgsave( server )
self.assertTrue( bgsave_ret, 'failed to bgsave. pgs%d' % server['id'] )
# shutdown
ret = testbase.request_to_shutdown_smr( server )
self.assertEqual( ret, 0, 'failed to shutdown smr' )
ret = testbase.request_to_shutdown_redis( server )
self.assertEqual( ret, 0, 'failed to shutdown redis' )
util.log('succeeded : shutdown pgs%d' % (server['id']))
# delete smr_logs
ret = util.delete_smr_logs( server['id'] )
self.assertEqual( ret, 0, 'failed to delete smr log, id:%d' % server['id'] )
util.log('succeeded : delete replication logs')
time.sleep( 5 )
# set value
ret = gw.connect( ip, port )
self.assertEqual( ret, 0, 'failed to connect to gateway' )
for i in range (50000, 100000):
timestamp[i] = time.time()
k = '%s_%d' % (key_base, i)
cmd = 'set %s %f\r\n' % (k, timestamp[i])
gw.write( cmd )
response = gw.read_until( '\r\n' )
self.assertNotEqual( response.find( '+OK' ), -1, 'failed to set key value through gateway' )
# recovery
ret = testbase.request_to_start_smr( server )
self.assertEqual( ret, 0, 'failed to start smr' )
ret = testbase.request_to_start_redis( server )
self.assertEqual( ret, 0, 'failed to start redis' )
time.sleep( 5 )
ret = testbase.wait_until_finished_to_set_up_role( server )
self.assertEquals( ret, 0, 'failed to role change. smr_id:%d' % (server['id']) )
util.log('succeeded : recover pgs%d' % server['id'])
# check value
recovered_redis = redis_mgmt.Redis( server['id'] )
ret = recovered_redis .connect( server['ip'], server['redis_port'] )
self.assertEquals( ret, 0, 'failed to connect to redis' )
for i in range (0, 100000):
k = '%s_%d' % (key_base, i)
cmd = 'get %s\r\n' % (k)
recovered_redis .write( cmd )
recovered_redis.read_until( '\r\n' )
response = recovered_redis.read_until( '\r\n' )
self.assertEqual( response, '%f\r\n' % (timestamp[i]), 'inconsistent %s, %f' % (response, timestamp[i]) )
def test_restart_recovery_with_remote_checkpoint_and_remote_log( self ):
util.print_frame()
key_base = 'key'
target = util.get_server_by_role( self.cluster['servers'], 'slave' )
master = util.get_server_by_role( self.cluster['servers'], 'master' )
ip, port = util.get_rand_gateway( self.cluster )
gw = gateway_mgmt.Gateway( master['id'] )
ret = gw.connect( ip, port )
self.assertEqual( ret, 0, 'failed to connect to gateway' )
# set initial data in order to make an elapsed time for bgsave longer
self.put_some_data()
# generate some data
for i in range( 0, 100 ):
key = '%s%d' % (key_base, i)
cmd = 'set %s %d\r\n' % (key, i)
gw.write( cmd )
res = gw.read_until( '\r\n' )
self.assertEquals( res, '+OK\r\n' )
gw.disconnect()
# delete a local checkpoint
util.log('delete pgs%d`s check point.' % target['id'])
util.del_dumprdb( target['id'] )
# generate a remote check point
bgsave_ret = util.bgsave( master )
self.assertTrue( bgsave_ret, 'failed to bgsave. pgs%d' % master['id'] )
# shutdown
util.log('shutdown target')
ret = testbase.request_to_shutdown_smr( target )
self.assertEqual( ret, 0, 'failed to shutdown smr' )
time.sleep( 10 )
# generate some data
ret = gw.connect( ip, port )
self.assertEqual( ret, 0, 'failed to connect to gateway' )
for i in range( 100, 200 ):
key = '%s%d' % (key_base, i)
cmd = 'set %s %d\r\n' % (key, i)
gw.write( cmd )
res = gw.read_until( '\r\n' )
self.assertEquals( res, '+OK\r\n' )
gw.disconnect()
# recovery
util.log('recovery target')
ret = testbase.request_to_start_smr( target )
self.assertEqual( ret, 0, 'failed to start smr' )
ret = testbase.request_to_start_redis( target )
self.assertEqual( ret, 0, 'failed to start redis' )
time.sleep( 5 )
ret = testbase.wait_until_finished_to_set_up_role( target)
self.assertEquals( ret, 0, 'failed to role change. smr_id:%d' % (target['id']) )
# check value
recovered_redis = redis_mgmt.Redis( target['id'] )
ret = recovered_redis .connect( target['ip'], target['redis_port'] )
self.assertEquals( ret, 0, 'failed to connect to redis' )
for i in range (0, 200):
key = '%s%d' % (key_base, i)
cmd = 'get %s\r\n' % (key)
recovered_redis .write( cmd )
recovered_redis.read_until( '\r\n' )
response = recovered_redis.read_until( '\r\n' )
self.assertEqual( response, '%d\r\n' % i, 'inconsistent %s, %d' % (response, i) )
def deprecated_test_5_PGS_commit_is_greater_than_PG_commit(self):
util.print_frame()
# get gateway info
ip, port = util.get_rand_gateway(self.cluster)
gw = gateway_mgmt.Gateway(self.cluster['servers'][0]['id'])
ret = gw.connect(ip, port)
self.assertEqual(ret, 0,
'failed to connect to gateway, %s:%d' % (ip, port))
# initial data
util.put_some_data(self.cluster)
master, s1, s2 = util.get_mss(self.cluster)
server_to_join = [s1, s2]
# shutdown slaves
for i in range(0, 2):
ret = testbase.request_to_shutdown_smr(server_to_join[i])
self.assertEqual(
ret, 0, 'failed to shutdown smr%d' % server_to_join[i]['id'])
util.log('succeeded to shutdown smr%d' % server_to_join[i]['id'])
ret = testbase.request_to_shutdown_redis(server_to_join[i])
self.assertEquals(ret, 0, 'failed to shutdown redis')
util.log('succeeded to shutdown redis%d' % server_to_join[i]['id'])
# check state F
max_try = 20
expected = 'F'
for j in range(0, max_try):
state = util.get_smr_state(server_to_join[i], self.leader_cm)
if expected == state:
break
time.sleep(1)
self.assertEquals(
expected, state, 'server%d - state:%s, expected:%s' %
(server_to_join[i]['id'], state, expected))
# put more data
util.put_some_data(self.cluster, 10, 256)
# bgsave
ret = util.bgsave(master)
self.assertTrue(ret, 'failed to bgsave. pgs%d' % master['id'])
# shutdown master
ret = testbase.request_to_shutdown_smr(master)
self.assertEqual(ret, 0, 'failed to shutdown smr')
util.log('succeeded to shutdown master smr, id=%d' % master['id'])
ret = testbase.request_to_shutdown_redis(master)
self.assertEquals(ret, 0, 'failed to shutdown redis')
util.log('succeeded to shutdown master redis, id=%d' % master['id'])
# check state F
max_try = 20
expected = 'F'
for i in range(0, max_try):
state = util.get_smr_state(master, self.leader_cm)
if expected == state:
break
time.sleep(1)
self.assertEquals(
expected, state, 'server%d - state:%s, expected:%s' %
(master['id'], state, expected))
# recovery slaves
for i in range(0, 2):
ret = testbase.request_to_start_smr(server_to_join[i])
self.assertEqual(ret, 0, 'failed to start smr')
ret = testbase.request_to_start_redis(server_to_join[i])
self.assertEqual(ret, 0, 'failed to start redis')
ret = testbase.wait_until_finished_to_set_up_role(
server_to_join[i], 10)
self.assertEquals(
ret, 0,
'failed to role change. smr_id:%d' % (server_to_join[i]['id']))
# check state N
max_try = 20
expected = 'N'
for j in range(0, max_try):
state = util.get_smr_state(server_to_join[i], self.leader_cm)
if expected == state:
break
time.sleep(1)
role = util.get_role_of_server(server_to_join[i])
self.assertEquals(
expected, state, 'server%d - state:%s, expected:%s, role:%s' %
(server_to_join[i]['id'], state, expected, role))
# set value
s = random.choice(server_to_join)
redis = redis_mgmt.Redis(['id'])
ret = redis.connect(s['ip'], s['redis_port'])
self.assertEquals(ret, 0, 'failed to connect to redis')
key_base = 'key_test'
for i in range(0, 10000):
cmd = 'set %s%d %d\r\n' % (key_base, i, i)
redis.write(cmd)
res = redis.read_until('\r\n')
self.assertEquals(res, '+OK\r\n')
redis.disconnect()
for i in range(0, 2):
redis = redis_mgmt.Redis(server_to_join[i]['id'])
ret = redis.connect(server_to_join[i]['ip'],
server_to_join[i]['redis_port'])
self.assertEquals(ret, 0, 'failed to connect to redis')
# check value
for j in range(0, 10000):
cmd = 'get %s%d\r\n' % (key_base, j)
redis.write(cmd)
redis.read_until('\r\n')
response = redis.read_until('\r\n')
self.assertEqual(response, '%d\r\n' % (j),
'inconsistent %s, %d' % (response[:-2], j))
# try to recover master, but failed
ret = testbase.request_to_start_smr(master)
self.assertEqual(ret, 0, 'failed to start smr')
ret = testbase.request_to_start_redis(master, False)
self.assertEqual(ret, 0, 'failed to start redis')
max_try = 3
expected = 'N'
for i in range(0, max_try):
state = util.get_smr_state(master, self.leader_cm)
if expected == state:
break
time.sleep(1)
role = util.get_role_of_server(master)
self.assertNotEqual(
expected, state, 'server%d - state:%s, expected:not %s, role:%s' %
(master['id'], state, expected, role))
util.log(
'success : the old master that has a greater commit-seq than the current master tried to join as a slave, but it is blocked successfully.'
)
gw.disconnect()
return 0
