利用binlog2sql快速閃回誤刪除數據

下面進行實戰演練：
binlog2sql工具的下載地址： https://github.com/danfengcao/binlog2sql
第一步：環境準備安裝各類依賴的工具包列表

python-pip ，
PyMySQL ，
python-mysql-replication，
wheel argparse
第二步：解壓binlog2sql軟件，命令以下

unzip  binlog2sql-master.zip
cd binlog2sql-master
pip install –r requirements.txt

第三步：經過python binlog2sql.py --help命令，來查看重要參數的使用;

-B, --flashback 生成回滾語句
--start-file 須要解析的binlog文件
--start-position 解析binlog的起始位置
--stop-position解析binlog的結束位置
--start-datetime 從哪一個時間點的binlog開始解析，格式必須爲datetime
--stop-datetime 到哪一個時間點的binlog中止解析，格式必須爲datetime
-d, --databases 只輸出目標db的sql
-t, --tables 只輸出目標tables的sql
第四步：開始模擬數據刪除
首先刪除掉zs庫下，t表中的數據

root@db 14:26:  [zs]> select * from t;
+----+------+---------+
| id | name | address |
+----+------+---------+
|  1 | aaa  | bj      |
|  2 | bbb  | sh      |
|  3 | ccc  | gz      |
|  4 | ddd  | sy      |
|  5 | eee  | fj      |
+----+------+---------+
5 rows in set (0.00 sec)

root@db 14:26:  [zs]> delete from t;
Query OK, 5 rows affected (0.04 sec)

root@db 14:27:  [zs]> select * from t;
Empty set (0.00 sec)

第五步：須要建立一個閃回用戶

create user 'zs_test'@'%' identified by '123456';
grant select,replication slave,replication client on *.* to 'zs_test'@'%' ;
flush privileges;

第六步：肯定當前binlog文件和position位置

root@db 14:41:  [zs]> show master status;
+---------------------+----------+--------------+------------------+------------------------------------------+
| File                | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set                        |
+---------------------+----------+--------------+------------------+------------------------------------------+
| mysql-binlog.000002 |     2091 |              |                  | e10f0ead-d595-11e7-82cb-080027cd683a:1-8 |
+---------------------+----------+--------------+------------------+------------------------------------------+

能夠看到當前binlog是：mysql-binlog.000002
位置偏移量：2091

第七步：須要預估下時間，誤操做的時間範圍應該在下午2點20分到2點30分之間。命令以下：

python binlog2sql.py -h192.168.56.102 -P3306 -uzs_test -p123456 -dzs -tt --start-file='mysql-binlog.000002' --start-datetime='2017-11-30 14:20:00' --stop-datetime='2017-11-30 14:30:00'
輸出結果：
DELETE FROM zs.t WHERE address='bj' AND id=1 AND name='aaa' LIMIT 1; #start 1214 end 1427 time 2017-11-30 14:27:46
DELETE FROM zs.t WHERE address='sh' AND id=2 AND name='bbb' LIMIT 1; #start 1214 end 1427 time 2017-11-30 14:27:46
DELETE FROM zs.t WHERE address='gz' AND id=3 AND name='ccc' LIMIT 1; #start 1214 end 1427 time 2017-11-30 14:27:46
DELETE FROM zs.t WHERE address='sy' AND id=4 AND name='ddd' LIMIT 1; #start 1214 end 1427 time 2017-11-30 14:27:46
DELETE FROM zs.t WHERE address='fj' AND id=5 AND name='eee' LIMIT 1; #start 1214 end 1427 time 2017-11-30 14:27:46

從解析結果中咱們瞭解到，誤操做sql的位置是在1214~1427之間;這樣就能夠進一步過濾，使用flashback模式生成回滾sql；
命令以下：
python binlog2sql.py -h192.168.56.102 -P3306 -uzs_test -p123456 -dzs -tt --start-file='mysql-binlog.000002' --start-position=1214 --stop-position=1427 -B >t_rollback.sql

查看閃回導出文件：

[root@node3 binlog2sql]# cat t_rollback.sql
INSERT INTO zs.t(address, id, name) VALUES ('fj', 5, 'eee'); #start 1214 end 1427 time 2017-11-30 14:27:46
INSERT INTO zs.t(address, id, name) VALUES ('sy', 4, 'ddd'); #start 1214 end 1427 time 2017-11-30 14:27:46
INSERT INTO zs.t(address, id, name) VALUES ('gz', 3, 'ccc'); #start 1214 end 1427 time 2017-11-30 14:27:46
INSERT INTO zs.t(address, id, name) VALUES ('sh', 2, 'bbb'); #start 1214 end 1427 time 2017-11-30 14:27:46
INSERT INTO zs.t(address, id, name) VALUES ('bj', 1, 'aaa'); #start 1214 end 1427 time 2017-11

第八步：應用回滾文件，恢復數據。命令以下：
/usr/local/mysql/bin/mysql -uroot -proot123 zs < t_rollback.sql

第九步：檢驗恢復數據是否成功

root@db 15:09: [zs]> select * from t;+----+------+---------+| id | name | address |+----+------+---------+| 1 | aaa | bj || 2 | bbb | sh || 3 | ccc | gz || 4 | ddd | sy || 5 | eee | fj |+----+------+---------+5 rows in set (0.00 sec)驗證恢復數據成功！