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executable file
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#!/usr/bin/env python
# -*- coding: utf-8 -*-
import sys
import datetime
import pymysql
from pymysqlreplication import BinLogStreamReader
from pymysqlreplication.event import QueryEvent, RotateEvent, FormatDescriptionEvent
from binlog2sql_util import command_line_args, concat_sql_from_binlog_event, create_unique_file, temp_open, \
reversed_lines, is_dml_event, event_type, is_bulkable_event, generate_bulk_insert_sql
class Binlog2sql(object):
def __init__(self, connection_settings, start_file=None, start_pos=None, end_file=None, end_pos=None,
start_time=None, stop_time=None, only_schemas=None, only_tables=None, no_pk=False,
flashback=False, stop_never=False, back_interval=1.0, only_dml=True, sql_type=None,
debug_mode=False, keep_tmp_file=False, try_bulk_insert=False, reverse_lines=False):
"""
conn_setting: {'host': 127.0.0.1, 'port': 3306, 'user': user, 'passwd': passwd, 'charset': 'utf8'}
"""
if not start_file:
raise ValueError('Lack of parameter: start_file')
self.conn_setting = connection_settings
self.start_file = start_file
self.start_pos = start_pos if start_pos else 4 # use binlog v4
self.end_file = end_file if end_file else start_file
self.end_pos = end_pos
if start_time:
self.start_time = datetime.datetime.strptime(start_time, "%Y-%m-%d %H:%M:%S")
else:
self.start_time = datetime.datetime.strptime('1980-01-01 00:00:00', "%Y-%m-%d %H:%M:%S")
if stop_time:
self.stop_time = datetime.datetime.strptime(stop_time, "%Y-%m-%d %H:%M:%S")
else:
self.stop_time = datetime.datetime.strptime('2999-12-31 00:00:00', "%Y-%m-%d %H:%M:%S")
self.only_schemas = only_schemas if only_schemas else None
self.only_tables = only_tables if only_tables else None
self.no_pk, self.flashback, self.stop_never, self.back_interval = (no_pk, flashback, stop_never, back_interval)
self.only_dml = only_dml
self.sql_type = set([t.upper() for t in sql_type] if sql_type else [])
self.debug_mode = debug_mode
self.keep_tmp_file = keep_tmp_file
self.try_bulk_insert = try_bulk_insert
self.reverse_lines = reverse_lines
self.binlog_list = set()
self.connection = pymysql.connect(**self.conn_setting)
with self.connection.cursor() as cursor:
cursor.execute("SHOW MASTER STATUS")
self.eof_file, self.eof_pos = cursor.fetchone()[:2]
cursor.execute("SHOW MASTER LOGS")
bin_index = [row[0] for row in cursor.fetchall()]
if self.start_file not in bin_index:
raise ValueError('parameter error: start_file %s not in mysql server' % self.start_file)
binlog2i = lambda x: x.split('.')[1]
for binary in bin_index:
if binlog2i(self.start_file) <= binlog2i(binary) <= binlog2i(self.end_file):
self.binlog_list.add(binary)
cursor.execute("SELECT @@server_id")
self.server_id = cursor.fetchone()[0]
if not self.server_id:
raise ValueError('missing server_id in %s:%s' % (self.conn_setting['host'], self.conn_setting['port']))
def process_binlog(self):
# ignored_events
stream = BinLogStreamReader(connection_settings=self.conn_setting, server_id=self.server_id,
log_file=self.start_file, log_pos=self.start_pos, only_schemas=self.only_schemas,
only_tables=self.only_tables, resume_stream=True, blocking=True)
flag_last_event = False
e_start_pos, last_pos = stream.log_pos, stream.log_pos
# to simplify code, we do not use flock for tmp_file.
tmp_file = create_unique_file('%s.%s' % (self.conn_setting['host'], self.conn_setting['port']))
with temp_open(tmp_file, "w", keep_tmp_file=self.keep_tmp_file, encoding='utf-8') as f_tmp, self.connection.cursor() as cursor:
for binlog_event in stream:
if not self.stop_never:
try:
event_time = datetime.datetime.fromtimestamp(binlog_event.timestamp)
except OSError:
event_time = datetime.datetime(1980, 1, 1, 0, 0)
if (stream.log_file == self.end_file and stream.log_pos == self.end_pos) or \
(stream.log_file == self.eof_file and stream.log_pos == self.eof_pos):
flag_last_event = True
elif event_time < self.start_time:
if not (isinstance(binlog_event, RotateEvent)
or isinstance(binlog_event, FormatDescriptionEvent)):
last_pos = binlog_event.packet.log_pos
continue
elif (stream.log_file not in self.binlog_list) or \
(self.end_pos and stream.log_file == self.end_file and stream.log_pos > self.end_pos) or \
(stream.log_file == self.eof_file and stream.log_pos > self.eof_pos) or \
(event_time >= self.stop_time):
break
# else:
# raise ValueError('unknown binlog file or position')
if isinstance(binlog_event, QueryEvent) and binlog_event.query == 'BEGIN':
e_start_pos = last_pos
if isinstance(binlog_event, QueryEvent) and not self.only_dml:
sql = concat_sql_from_binlog_event(cursor=cursor, binlog_event=binlog_event,
flashback=self.flashback, no_pk=self.no_pk)
if sql:
print(sql)
elif is_dml_event(binlog_event) and event_type(binlog_event) in self.sql_type:
if self.try_bulk_insert and len(binlog_event.rows) > 1 and is_bulkable_event(binlog_event, flashback=self.flashback):
sql = generate_bulk_insert_sql(cursor, binlog_event, binlog_event.rows, e_start_pos=e_start_pos)
if self.flashback:
f_tmp.write(sql + '\n')
else:
print(sql)
else:
for row in binlog_event.rows:
sql = concat_sql_from_binlog_event(cursor=cursor, binlog_event=binlog_event, no_pk=self.no_pk,
row=row, flashback=self.flashback, e_start_pos=e_start_pos)
if self.flashback:
f_tmp.write(sql + '\n')
else:
print(sql)
if not (isinstance(binlog_event, RotateEvent) or isinstance(binlog_event, FormatDescriptionEvent)):
last_pos = binlog_event.packet.log_pos
if flag_last_event:
break
stream.close()
f_tmp.close()
if self.flashback and self.reverse_lines:
self.print_rollback_sql(filename=tmp_file)
return True
def print_rollback_sql(self, filename):
"""
推荐自行reverse执行的语句，效率会更高
@see https://www.baeldung.com/linux/reverse-order-of-file-lines
print rollback sql from tmp_file
tail -r file //BSD NOT LINUX
tac file //reverse of cat
sed -i '1!G;h;$!d' file //may slowly than the others
"""
with open(filename, "rb") as f_tmp:
batch_size = 1000
i = 0
for line in reversed_lines(f_tmp):
print(line.rstrip())
if i >= batch_size:
i = 0
if self.back_interval:
print('SELECT SLEEP(%s);' % self.back_interval)
else:
i += 1
def __del__(self):
pass
if __name__ == '__main__':
args = command_line_args(sys.argv[1:])
conn_setting = {'host': args.host, 'port': args.port, 'user': args.user, 'passwd': args.password, 'charset': args.charset}
binlog2sql = Binlog2sql(connection_settings=conn_setting, start_file=args.start_file, start_pos=args.start_pos,
end_file=args.end_file, end_pos=args.end_pos, start_time=args.start_time,
stop_time=args.stop_time, only_schemas=args.databases, only_tables=args.tables,
no_pk=args.no_pk, flashback=args.flashback, stop_never=args.stop_never,
back_interval=args.back_interval, only_dml=args.only_dml, sql_type=args.sql_type,
debug_mode=args.debug_mode, keep_tmp_file=args.keep_tmp_file, try_bulk_insert=args.try_bulk_insert,
reverse_lines=args.reverse_lines)
binlog2sql.process_binlog()