-
Notifications
You must be signed in to change notification settings - Fork 0
/
sync_db.py
261 lines (212 loc) · 9.87 KB
/
sync_db.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
#!/usr/bin/env python
# -*- coding:utf8 -*-
import os
import json
import time
import argparse
from slogging import slog
full_dump_return_code = {
'error': 0,
'success': 1,
'already_load': 2
}
class SyncDb(object):
def __init__(self, rsync_cmd, work_dir = '/tmp/syncdb', host = '127.0.0.1', port = 3306, password = 'smaug'):
self.host_ = host
self.port_ = port
self.password_ = password
self.load_cache_ = {}
self.init_lock_file_ = '/var/lib/.topargus_db_sync_lock'
self.work_dir_ = work_dir
self.rsync_cmd_ = rsync_cmd
self.work_dir_temp_ = os.path.join(self.work_dir_, 'temp') # /root/smaug/topargus-db-sync/temp
os.system('mkdir -p {0}'.format(self.work_dir_temp_))
return
def load_from_first_full_dump(self, full_sql_file):
if os.path.exists(self.init_lock_file_):
slog.warn('already load the full dump')
return full_dump_return_code.get('already_load')
binlog_index_file = os.path.join(self.work_dir_, 'mysql-bin.index')
if not os.path.exists(binlog_index_file):
slog.error('binlog_index file not found')
return full_dump_return_code.get('error')
first_full_cmd = 'mysql -u root -p{0} -h {1} -P {2} < {3}'.format(self.password_, self.host_, self.port_, full_sql_file)
last_binlog = None
last_binlog_sql = None
with open(binlog_index_file, 'r') as fin:
for line in fin:
line = line[:-1]
binlog = line.split('/')[-1]
abs_binlog = os.path.join(self.work_dir_, binlog)
last_binlog = abs_binlog
last_binlog_sql = '{0}.sql'.format(os.path.join(self.work_dir_temp_, binlog))
if first_full_cmd != None:
slog.debug(first_full_cmd)
os.popen(first_full_cmd)
slog.debug('cmd done')
first_full_cmd = None
cmd = 'mysqlbinlog {0} | mysql -u root -p{1} -h {2} -P {3}'.format(abs_binlog, self.password_, self.host_, self.port_)
slog.debug(cmd)
os.popen(cmd)
slog.debug('cmd done')
if not last_binlog or not last_binlog_sql:
slog.error('first load, make sure have at least one mysql-bin.00000x data, please run rsync command: {0} manual')
return full_dump_return_code.get('error')
cmd = 'mysqlbinlog {0} > {1}'.format(last_binlog, last_binlog_sql)
slog.debug(cmd)
os.popen(cmd)
slog.debug('cmd done')
cmd = 'tail -n 50 {0} |grep -a end_log_pos |tail -n 1'.format(last_binlog_sql)
r = os.popen(cmd).readlines()
if not r:
slog.error("error: can not grep end_log_pos of last_binlog_sql:{0}".format(last_binlog_sql))
return full_dump_return_code.get('error')
# ['#191231', '21:53:37', 'server', 'id', '321', 'end_log_pos', '2619792', 'Xid', '=', '469098']
rl = r[-1].split()
end_log_pos = ''
for i in range(0, len(rl)):
item = rl[i]
if item == 'end_log_pos':
end_log_pos = rl[i+1]
if not end_log_pos:
slog.error("error: can not grep end_log_pos of last_binlog_sql:{0}".format(last_binlog_sql))
return full_dump_return_code.get('error')
self.load_cache_ = {
'last_binlog':last_binlog,
'end_log_pos': end_log_pos
}
with open(self.init_lock_file_, 'w') as fout:
fout.write(json.dumps(self.load_cache_))
fout.close()
slog.info('dump load_cache:{0} to file:{1}'.format(json.dumps(self.load_cache_), self.init_lock_file_))
return full_dump_return_code.get('success')
def rsync_binlog(self):
cmd = self.rsync_cmd_
slog.debug(cmd)
result = os.popen(cmd).readlines()
if result:
slog.debug('rsync: {0}'.format(json.dumps(result)))
slog.debug('cmd done')
return
def update_load_cache(self):
try:
with open(self.init_lock_file_, 'r') as fin:
self.load_cache_ = json.loads(fin.read())
slog.debug('update load_cache:{0} from file:{1}'.format(json.dumps(self.load_cache_), self.init_lock_file_))
return True
except Exception as e:
slog.error('catch exception:{0}'.format(e))
return False
return False
def load_from_binlog(self):
if not self.update_load_cache():
return False
binlog_index_file = os.path.join(self.work_dir_, 'mysql-bin.index')
if not os.path.exists(binlog_index_file):
slog.error('binlog_index file not found')
return False
old_last_binlog = self.load_cache_.get('last_binlog')
old_end_log_pos = self.load_cache_.get('end_log_pos')
run = False
last_binlog = None
last_binlog_sql = None
ready_binlog_list = []
with open(binlog_index_file, 'r') as fin:
for line in fin:
line = line[:-1]
binlog = line.split('/')[-1]
abs_binlog = os.path.join(self.work_dir_, binlog)
if abs_binlog == old_last_binlog:
run = True
if not run:
continue
ready_binlog_list.append(abs_binlog)
last_binlog = abs_binlog
last_binlog_sql = '{0}.sql'.format(os.path.join(self.work_dir_temp_, binlog))
fin.close()
if not last_binlog or not last_binlog_sql:
return False
# first rm temp/*.sql
rm_tmp_sql_cmd = 'rm {0}/*.sql'.format(self.work_dir_temp_)
os.popen(rm_tmp_sql_cmd)
slog.info("excute cmd:{0}".format(rm_tmp_sql_cmd))
cmd = 'mysqlbinlog {0} > {1}'.format(last_binlog, last_binlog_sql)
slog.debug(cmd)
os.popen(cmd)
slog.debug('cmd done')
cmd = 'tail -n 50 {0} |grep -a end_log_pos |tail -n 1'.format(last_binlog_sql)
r = os.popen(cmd).readlines()
if not r:
slog.error("error: can not grep end_log_pos of last_binlog_sql:{0}".format(last_binlog_sql))
return False
# ['#191231', '21:53:37', 'server', 'id', '321', 'end_log_pos', '2619792', 'Xid', '=', '469098']
rl = r[-1].split()
end_log_pos = ''
for i in range(0, len(rl)):
item = rl[i]
if item == 'end_log_pos':
end_log_pos = rl[i+1]
if not end_log_pos:
slog.error("error: can not grep end_log_pos of last_binlog_sql:{0}".format(last_binlog_sql))
return False
self.load_cache_ = {
'last_binlog':last_binlog,
'end_log_pos': end_log_pos
}
with open(self.init_lock_file_, 'w') as fout:
fout.write(json.dumps(self.load_cache_))
fout.close()
slog.debug('dump load_cache:{0} to file:{1}'.format(json.dumps(self.load_cache_), self.init_lock_file_))
if last_binlog == old_last_binlog and end_log_pos == old_end_log_pos:
slog.info('binlog and end_log_pos both same with last time, no need load')
return True
if last_binlog == old_last_binlog and end_log_pos != old_end_log_pos:
start_position = old_end_log_pos # TODO(smaug)
cmd = 'mysqlbinlog {0} --start-position {1} | mysql -u root -p{2} -h {3} -P {4}'.format(abs_binlog, start_position, self.password_, self.host_, self.port_)
slog.info(cmd)
os.popen(cmd)
slog.debug('cmd done')
return True
# new binlog sync, start from the second item, index is 1
for i in range(1, len(ready_binlog_list)):
abs_binlog = ready_binlog_list[i]
cmd = 'mysqlbinlog {0} | mysql -u root -p{1} -h {2} -P {3}'.format(abs_binlog, self.password_, self.host_, self.port_)
slog.debug(cmd)
os.popen(cmd)
slog.debug('cmd done')
return True
def run(self, full_sql_file = ''):
result = self.load_from_first_full_dump(full_sql_file)
if result == full_dump_return_code.get('error'):
slog.error('error, error, please make sure then run again')
return False
slog.debug('first load finished, will run rsync forever')
time.sleep(2)
while True:
slog.debug('wait 20 s, then rsync...')
time.sleep(20)
try:
self.rsync_binlog()
self.load_from_binlog()
except Exception as e:
slog.error('catch exception:{0}'.format(e))
return
if __name__ == '__main__':
parser = argparse.ArgumentParser()
parser.description='sync_db ，using rsync to sync binlog'
parser.add_argument('-H', '--host', help='client mysql host', default='127.0.0.1')
parser.add_argument('-P', '--port', help='client mysql port', default= 3306)
parser.add_argument('-a', '--password', help='client mysql password', default='smaug')
parser.add_argument('-d', '--dir', help='work dir, put rsync files into this dir', default='/root/smaug/topargus-db-sync')
parser.add_argument('-f', '--file', help="the first time full_dump sql file", default='/root/smaug/topargus-db-sync/topargus_201912311800.sql')
parser.add_argument('-r', '--rsync', help="rsync command", required=True)
args = parser.parse_args()
host = args.host
port = args.port
password = args.password
work_dir = args.dir
#rsync_cmd = 'rsync -avHe "ssh -p 1022 -i /root/.ssh/top-digital-ocean.pem" root@192.168.1.1::dashdb /root/smaug/topargus-db-sync/'
rsync_cmd = args.rsync
full_sql_file = args.file
sync = SyncDb(rsync_cmd = rsync_cmd, work_dir = work_dir, host = host, port = port, password = password)
sync.run(full_sql_file = full_sql_file)