-
Notifications
You must be signed in to change notification settings - Fork 7
/
Copy pathmtRplGurad.py
258 lines (213 loc) · 8.21 KB
/
mtRplGurad.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
#/usr/bin/python
#coding：utf8
#作者：吴炳锡 知数堂MySQL课程中复制故障自动化处理Demo
import sys
import os
import re
import optparse
import pymysql
from pymysql.constants import CLIENT
MYSQL_SHOW_SLAVE_STATUS = 'SHOW SLAVE STATUS;'
GTID_MODE = "select @@gtid_mode"
com_mysqlbinlog = "/usr/local/mysql/bin/mysqlbinlog"
GET_FROM_LOG="%s -v --base64-output=decode-rows -R --host='%s' --port=%d --user='%s' --password='%s' --start-position=%d --stop-position=%d %s |grep @%s|head -n 1"
FLAGS = optparse.Values()
parser = optparse.OptionParser()
def DEFINE_string(name, default, description, short_name=None):
if default is not None and default != '':
description = "%s (default: %s)" % (description, default)
args = [ "--%s" % name ]
if short_name is not None:
args.insert(0, "-%s" % short_name)
parser.add_option(type="string", help=description, *args)
parser.set_default(name, default)
setattr(FLAGS, name, default)
def DEFINE_integer(name, default, description, short_name=None):
if default is not None and default != '':
description = "%s (default: %s)" % (description, default)
args = [ "--%s" % name ]
if short_name is not None:
args.insert(0, "-%s" % short_name)
parser.add_option(type="int", help=description, *args)
parser.set_default(name, default)
setattr(FLAGS, name, default)
DEFINE_integer('db_port', '3306', 'DB port : 3306')
DEFINE_string('db_user', 'wubx', 'DB user ')
DEFINE_string('db_password', '', 'DB password')
DEFINE_string('db_host', '127.0.0.1', 'DB Hostname')
def ShowUsage():
print("python RplGurad.py --db_host=192.168.11.111 --db_port=3310 --db_user='wubx' --db_password='wubxwubx'")
parser.print_help()
exit(1)
def ParseArgs(argv):
usage = sys.modules["__main__"].__doc__
parser.set_usage(usage)
unused_flags, new_argv = parser.parse_args(args=argv, values=FLAGS)
return new_argv
def get_conn():
return pymysql.connect(host=FLAGS.db_host, port=int(FLAGS.db_port), user=FLAGS.db_user,passwd=FLAGS.db_password,
client_flag=CLIENT.MULTI_STATEMENTS)
def start_slave():
cursor = conn.cursor()
cursor.execute("start slave")
cursor.close()
def get_tb_pk(db_table):
db, tb = db_table.split('.')
conn = get_conn()
sql = "select column_name,ordinal_position from information_schema.columns where table_schema='%s' and table_name='%s' and column_key='PRI';" % (db, tb)
cursor = conn.cursor()
cursor.execute(sql)
r = cursor.fetchone()
cursor.close()
conn.close()
return r
def get_rpl_worker(conn):
cursor = conn.cursor()
cursor.execute("select @@slave_parallel_workers")
r = cursor.fetchone()
cursor.close()
if r[0] >= 1:
return 1
else:
return 0
return 0
def get_rpl_mode(conn):
cursor = conn.cursor()
cursor.execute(GTID_MODE)
r = cursor.fetchone()
cursor.close()
if (r[0] == "ON"):
return 1
else:
return 0
def handler_multi_1062(r):
conn = get_conn()
cursor = conn.cursor()
cursor.execute("select LAST_ERROR_MESSAGE from performance_schema.replication_applier_status_by_worker where "
"LAST_ERROR_NUMBER=1062 limit 1")
emsg = cursor.fetchone()[0]
print(emsg)
pattern = r"Could not execute Write_rows event on table (?P<tb>\w+.\w+); Duplicate entry '(?P<pk>\d+)' for key"
regex = re.compile(pattern)
match = regex.search(emsg)
print(match.groupdict())
pk_col = get_tb_pk(match['tb'])[0]
baksql = "select * from %s where %s=%s" %(match['tb'], pk_col, match['pk'])
print(baksql)
delsql = "delete from %s where %s=%s" %(match['tb'], pk_col, match['pk'])
conn = get_conn()
cursor = conn.cursor()
cursor.execute(baksql)
print(cursor.fetchone())
conn.commit()
print(delsql)
cursor.execute("set session sql_log_bin=0;")
cursor.execute(delsql)
#cursor.execute("set session sql_log_bin=1")
cursor.execute("start slave sql_thread")
cursor.close()
conn.commit()
conn.close()
return 0
def handler_multi_1032(r):
conn = get_conn()
cursor = conn.cursor()
cursor.execute("select LAST_ERROR_MESSAGE from performance_schema.replication_applier_status_by_worker where "
"LAST_ERROR_NUMBER=1032 limit 1")
emsg = cursor.fetchone()[0]
print(emsg)
patterns = [
r'(?P<uuid>[0-9a-f]{8}(-[0-9a-f]{4}){3}-[0-9a-f]{12})\:(?P<gtid>\d+)',
r'(?P<binlog>(\w+\-\w+\.\d+)), end_log_pos (?P<pos>(\d+));',
r'Could not execute (?P<event>\w+)_rows event on table (?P<db>\w+).(?P<tb>\w+)',
]
d = {}
for pattern in patterns:
regex = re.compile(pattern)
match = regex.search(emsg)
d.update(match.groupdict())
#print(d)
if (d['event'].upper() == 'DELETE'):
sql = "stop slave sql_thread; set gtid_next='%s:%s'; begin;commit; set gtid_next=AUTOMATIC;start slave " \
"sql_thread;" % (d['uuid'], d['gtid'])
print(sql)
cursor.execute(sql)
if (d['event'].upper() == 'UPDATE' ):
dbtable="%s.%s"%(d['db'], d['tb'])
pk_seq = get_tb_pk(dbtable)[1]
do_getlog = GET_FROM_LOG % (
com_mysqlbinlog, r['Master_Host'], int(r['Master_Port']), FLAGS.db_user, FLAGS.db_password,
int(r['Exec_Master_Log_Pos']), int(d['pos']), d['binlog'], pk_seq)
print(do_getlog)
pk_value = os.popen(do_getlog).readlines()[0].split("=", 2)[1].rstrip()
print(pk_value)
sql = mk_tb_replace(dbtable, pk_value, pk_seq)
cursor.execute("set session sql_log_bin=0;")
cursor.execute(sql)
# cursor.execute("set session sql_log_bin=1")
cursor.execute("start slave sql_thread")
conn.commit()
cursor.close()
conn.close()
return 0
def mk_tb_replace(db_table, pk_value, pk_seq):
db, tb_name = db_table.split(".")
r = "replace into %s.%s "%(db,tb_name)
sql = "select column_name, ORDINAL_POSITION from information_schema.columns where table_schema='%s' and table_name='%s' and IS_NULLABLE='NO';" % (db, tb_name)
#print sql
col_list=''
value_list=''
conn = get_conn()
cusror = conn.cursor()
cusror.execute(sql)
result = cusror.fetchall()
for col in result:
if (col[1] == pk_seq):
col_list = col_list +"%s," % (col[0])
value_list = value_list + "'%s'," % (pk_value)
else:
col_list = col_list +"%s," % (col[0])
value_list = value_list + "'%s'," % ('1')
print(value_list)
r = r+"(%s) values(%s)" % ( col_list.rstrip(','), value_list.rstrip(','))
cusror.close()
conn.close()
return r.rstrip(',')
def get_slave_status(conn):
cursor = conn.cursor(pymysql.cursors.DictCursor)
cursor.execute(MYSQL_SHOW_SLAVE_STATUS)
result = cursor.fetchone()
return result
cursor.close()
if __name__ == '__main__':
ParseArgs(sys.argv[1:])
conn = get_conn()
rpl_mode = get_rpl_mode(conn)
slave_parallel = get_rpl_worker(conn)
if (rpl_mode == 0 ):
print("只支持GTID模式的复制故障修复")
exit(1)
if (slave_parallel == 0 ):
print("只支持slave_parallel_workers大于0的复制模式修复")
r = get_slave_status(conn)
#print(r)
if (r['Slave_IO_Running'].upper() == "YES" and r['Slave_SQL_Running'].upper() == "YES"):
print("Replication OK")
if (r['Seconds_Behind_Master'] > 0):
print(r['Seconds_Behind_Master'])
conn.close()
exit(0)
while( 1 ):
r = get_slave_status(conn)
if (r['Slave_IO_Running'] == "Yes" and r['Slave_SQL_Running'] == "No"):
if (r['Last_Errno'] == 1032 ):
r1032 = handler_multi_1032(r)
if (r['Last_Errno'] == 1062):
r1062 = handler_multi_1062(r)
elif (r['Slave_IO_Running'] == "No" and r['Slave_SQL_Running'] == "Yes"):
print("Replication slave： IO_thread no running ; do start slave")
start_slave(conn)
exit(1)
else:
exit(0)
conn.close()