巧用python-mysql-replication寻找pos点

!/usr/bin/python # -*- coding:utf-8 -*- import sys import datetime from pymysqlreplication import BinLogStreamReader from pymysqlreplication.row_event import DeleteRowsEvent, UpdateRowsEvent, WriteRowsEvent from pymysqlreplication.event import RotateEvent,QueryEvent reload(sys) sys.setdefaultencoding(‘utf8‘) conn_setting = { "host": "127.0.0.1", "port": 3306, "user": "xx", "passwd": "xx" } stream = BinLogStreamReader( connection_settings=conn_setting, server_id=9999, log_file="mysql-bin.000009", log_pos=4, resume_stream=True, blocking=True ) for binlogevent in stream: if isinstance(binlogevent, RotateEvent): current_master_log_file=binlogevent.next_binlog print "Next binlog file: %s" % (current_master_log_file) if isinstance(binlogevent, WriteRowsEvent) or isinstance(binlogevent, DeleteRowsEvent) or isinstance(binlogevent, UpdateRowsEvent) or isinstance(binlogevent, QueryEvent): if binlogevent.packet.server_id == 123: current_datetime=datetime.datetime.fromtimestamp(binlogevent.packet.timestamp) print "数据写入时间: %s" % (current_datetime) start_binlog_file=current_master_log_file start_binlog_pos=binlogevent.packet.log_pos print "开始的binlog文件: %s" % (start_binlog_file) print "开始的binlog pos点: %s" % (start_binlog_pos) exit(1)

输出结果如下：

Next binlog file: mysql-bin.000001
数据写入时间: 2020-05-11 11:56:09
开始的binlog文件: mysql-bin.000001
开始的binlog pos点: 146147

我们自己动手来解析binlog看看输出的pos点是否准确：

 

 可以看见是准确无误的。

总结：

线上一般会开启gtid或者使用其他高可用组件进行切换。python-mysql-replication是个好东西，建议同学们都学习使用一下。

 

巧用python-mysql-replication寻找pos点

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