mysqdump+binlog恢复数据

1. 备份全库

[root@db01 b]# mysqldump -uroot -poldboy123 -A > /b/full.sql

Warning: Using a password on the command line interface can be insecure.

[root@db01 b]#ll

total 656

-rw-r--r-- 1 root root 667860 Mar 11 15:39 full.sql

打开看下都是一些插入类的语句比较容易读懂,可以用awk.sed,等命令过滤需要的内容

[root@db01 b]#vim full.sql

CREATE DATABASE /*!32312 IF NOT EXISTS*/ `mysql` /*!40100 DEFAULT CHARACTER SET utf8 */;

USE `mysql`;

-- Table structure for table `columns_priv`

DROP TABLE IF EXISTS `columns_priv`;

/*!40101 SET @saved_cs_client = @@character_set_client */;

/*!40101 SET character_set_client = utf8 */;

CREATE TABLE `columns_priv` (

`Host` char(60) COLLATE utf8_bin NOT NULL DEFAULT '',

`Db` char(64) COLLATE utf8_bin NOT NULL DEFAULT '',

1. 对单库进行备份

[root@db01 b]#mysqldump -uroot -poldboy123 -B test test1 test2 > /b/test_jt.sql

mysql> show master status;

+------------------+----------+--------------+------------------+-------------------+

| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |

+------------------+----------+--------------+------------------+-------------------+

| mysql-bin.000029 | 120 | | | |

+------------------+----------+--------------+------------------+-------------------+

1. -F flush-logs刷新binlog 有几个库生成几个binlog

[root@db01 b]#mysqldump -uroot -poldboy123 -A -R --triggers --flush-logs > /b/flush.sql

mysql> show master status;

+------------------+----------+--------------+------------------+-------------------+

| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |

+------------------+----------+--------------+------------------+-------------------+

| mysql-bin.000032 | 120 | | | |

+------------------+----------+--------------+------------------+-------------------+

1. 模拟删库

2. 周日23:00全备此命令就是定时任务里的命令

[root@db01 b]#mysqldump -uroot -poldboy123 -A -R --triggers --master-data=2 --single-transaction | gzip > /b/all_`date +%F-%H-%M-S`.sql.gz

1. 模拟数据变化查,看插入的数据

mysql> create table ttt.nnn(id int primary key auto_increment not null, name char(20) not null);

mysql> insert into nnn values(1,'aa');

Query OK, 1 row affected (0.00 sec)

 

mysql> insert into nnn values(2,'bb');

Query OK, 1 row affected (0.00 sec)

 

mysql> insert into nnn values(3,'cc');

Query OK, 1 row affected (0.00 sec)

 

mysql> insert into nnn values(4,'dd');

Query OK, 1 row affected (0.00 sec)

mysql> select * from ttt.nnn;

+----+------+

| id | name |

+----+------+

| 1 | aa |

| 2 | bb |

| 3 | cc |

| 4 | dd |

+----+------+

mysql> show master status;

+------------------+----------+--------------+------------------+-------------------+

| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |

+------------------+----------+--------------+------------------+-------------------+

| mysql-bin.000028 | 850 | | | |

+------------------+----------+--------------+------------------+-------------------+

1. 模拟删库

mysql> drop databases ttt;

1. 查看起始点

这个就是全备时候加了 master-data=2 ,生成的备份文件,22行有恢复数据的起点,120

[root@db01 ~]#sed -n '22p' /b/all_2019-03-11-19-03-55.sql

-- CHANGE MASTER TO MASTER_LOG_FILE='mysql-bin.000028', MASTER_LOG_POS=120;

查看当前binlog是000028

mysql> show master status;

+------------------+----------+--------------+------------------+-------------------+

| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |

+------------------+----------+--------------+------------------+-------------------+

| mysql-bin.000028 | 939 | | | |

+------------------+----------+--------------+------------------+-------------------+

1. 查看结束点

结束点位置 ,就是drop pos的位置

mysql> show binlog events in "mysql-bin.000028";

+------------------+-----+-------------+-----------+-------------+-----------------------------------------------------------------------------------------------------+

| Log_name | Pos | Event_type | Server_id | End_log_pos | Info |

+------------------+-----+-------------+-----------+-------------+-----------------------------------------------------------------------------------------------------+

| mysql-bin.000028 | 4 | Format_desc | 6 | 120 | Server ver: 5.6.40-log, Binlog ver: 4

| mysql-bin.000028 | 120 | Query | 6 | 224 | create database ttt charset utf8

| mysql-bin.000028 | 224 | Query | 6 | 384 | use `ttt`; create table ttt.nnn(id int primary key auto_increment not null, name char(20) not null) |

| mysql-bin.000028 | 384 | Query | 6 | 455 | BEGIN

| mysql-bin.000028 | 455 | Table_map | 6 | 503 | table_id: 323 (ttt.nnn)

| mysql-bin.000028 | 503 | Write_rows | 6 | 546 | table_id: 323 flags: STMT_END_F

| mysql-bin.000028 | 546 | Table_map | 6 | 594 | table_id: 323 (ttt.nnn)

| mysql-bin.000028 | 594 | Write_rows | 6 | 637 | table_id: 323 flags: STMT_END_F

| mysql-bin.000028 | 637 | Table_map | 6 | 685 | table_id: 323 (ttt.nnn) |

| mysql-bin.000028 | 685 | Write_rows | 6 | 728 | table_id: 323 flags: STMT_END_F

| mysql-bin.000028 | 728 | Table_map | 6 | 776 | table_id: 323 (ttt.nnn)

| mysql-bin.000028 | 776 | Write_rows | 6 | 819 | table_id: 323 flags: STMT_END_F

| mysql-bin.000028 | 819 | Xid | 6 | 850 | COMMIT /* xid=3690 */

| mysql-bin.000028 | 850 | Query | 6 | 939 | drop database ttt

+------------------+-----+-------------+-----------+-------------+-------------------------------------------------------------------------

1. 导出截取的binlog起始点和结束点,这些数据就是删库,的数据

[root@db01 ~]#mysqlbinlog -uroot -poldboy123 --start-position=120 --stop-position=850 /data/mysql/mysql-bin.000028 > /b/delttt_binlog.sql

1. 停止binlog写入

mysql> set sql_log_bin=1

1. 恢复全备及 恢复截取的binlog

mysql> source /b/all_2019-03-11-19-03-55.sql;

mysql> source /b/delttt_binlog.sql;

1. 数据恢复了

mysql> select * from ttt.nnn;

+----+------+

| id | name |

+----+------+

| 1 | aa |

| 2 | bb |

| 3 | cc |

| 4 | dd |

+----+------+