經過全備+binlog_server同步恢復被drop的庫或表
MySQL 中drop 等高危誤操做後恢復方法
實驗目的:html
- 本次實驗以恢復drop操做爲例,使用不一樣方法進行誤操做的數據恢復.
方法:mysql
- 利用master同步
- :僞master+Binlog+同步(本文)
- 利用binlog改成realy-log在臨時slave更新
- 沒有備份怎麼恢復被drop的表(利用undrop-for-innodb)
1.環境sql
- mysql 5.7.23-log
- master db210(192.168.99.210)
- slave db212(192.168.99.212)
- 假裝master db210:3507
- 臨時slave:db211(192.168.99.211)
- 壓力:在作本次實驗過程用,使用sysbench同時作讀寫模擬壓力(28thread+10*100000行)
2.本實驗的前置條件:bash
- 在drop前至少有一次全量備份
- 從全備到drop操做時間點有全程binlog,而且binlog format='row'
若是沒有以上兩個備份怎麼辦?見《無備份的誤操做恢復方法》
3.模擬誤操做服務器
root@localhost [wenyz]>select count(*) from t2; +----------+ | count(*) | +----------+ | 163818 | +----------+ 1 row in set (0.12 sec) root@localhost [wenyz]>drop table t2; Query OK, 0 rows affected (0.02 sec) root@localhost [wenyz]>show master status; +------------------+-----------+--------------+------------------+------------------------------------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set | +------------------+-----------+--------------+------------------+------------------------------------------------+ | mysql-bin.000020 | 136445791 | | | 9e912d2b-92f6-11e8-9747-0050568be82c:1-9872111 | +------------------+-----------+--------------+------------------+------------------------------------------------+ 1 row in set (0.00 sec) root@localhost [wenyz]>flush logs; Query OK, 0 rows affected (1.41 sec)
4.在實驗不一樣方法以前先完成如下步驟:session
- 複製全備份和全部binlog文件到空閒服務器:db211上
- 以全備恢復到一個臨時新實例(臨時slave).
5.找到誤操做的位置(GTID或binlog pos)ide
經過查找懷疑的binlog: [root@db210_19:11:07 /data/57mysql/mysql3506/logs] #ll total 75564544 -rw-r----- 1 mysql mysql 177 Jul 29 14:14 mysql-bin.000001 ... -rw-r----- 1 mysql mysql 39336996 Jul 29 19:12 mysql-bin.000020 -rw-r----- 1 mysql mysql 13340 Jul 29 19:12 mysql-bin.index [root@db210_19:12:48 /data/57mysql/mysql3506/logs] binlog文件導出命令: #mysqlbinlog -v --base64-output=auto /data/57mysql/mysql3506/logs/mysql-bin.000020 >/data/backup/20.sql binlog文件導出後查找:DROP TABLE `t2`: 在mysql-bin.000020中找到對應位置: # at 97871478 #180731 19:33:29 server id 1853506 end_log_pos 97871543 CRC32 0x8cd4354d GTID last_committed=205567 sequence_number=205570 rbr_only=no original_committed_timestamp=0 immediate_commit_timestamp=0 transaction_length=0 # original_commit_timestamp=0 (1970-01-01 08:00:00.000000 CST) # immediate_commit_timestamp=0 (1970-01-01 08:00:00.000000 CST) /*!80001 SET @@session.original_commit_timestamp=0*//*!*/; SET @@SESSION.GTID_NEXT= '9e912d2b-92f6-11e8-9747-0050568be82c:9791090'/*!*/; # at 97871543 #180731 19:33:29 server id 1853506 end_log_pos 97871660 CRC32 0x974a86d8 Query thread_id=35 exec_time=0 error_code=0 use `wenyz`/*!*/; SET TIMESTAMP=1533036809/*!*/; /*!\C utf8 *//*!*/; SET @@session.character_set_client=33,@@session.collation_connection=33,@@session.collation_server=33/*!*/; DROP TABLE `t2` /* generated by server */ /*!*/; # at 97871660 #180731 19:33:29 server id 1853506 end_log_pos 97871725 CRC32 0xb85257d6 GTID last_committed=205567 sequence_number=205571 rbr_only=yes original_committed_timestamp=0 immediate_commit_timestamp=0 transaction_length=0 /*!50718 SET TRANSACTION ISOLATION LEVEL READ COMMITTED*//*!*/; # original_commit_timestamp=0 (1970-01-01 08:00:00.000000 CST) # immediate_commit_timestamp=0 (1970-01-01 08:00:00.000000 CST) /*!80001 SET @@session.original_commit_timestamp=0*//*!*/; SET @@SESSION.GTID_NEXT= '9e912d2b-92f6-11e8-9747-0050568be82c:9791091'/*!*/; # at 97871725
恢復方法二：code
- 初始化一個空實例(用於僞master),並配置同步帳號:
[root@db210_00:22:09 /data/57mysql/mysql3507/data] #/usr/local/mysql57/bin/mysqld --defaults-file=/data/57mysql/mysql3507/my3506.cnf --initialize [root@db210_00:22:30 /data/57mysql/mysql3507/data] #cat error.log |grep pass 2018-07-31T16:22:28.157717Z 1 [Note] A temporary password is generated for root@localhost: ?NqFa+vJZ9U_ [root@db210_00:22:45 /data/57mysql/mysql3507/data] #/usr/local/mysql57/bin/mysqld --defaults-file=/data/57mysql/mysql3507/my3506.cnf& [2] 19851 [root@db210_00:22:59 /data/57mysql/mysql3507/data] #mysql -S /tmp/mysql3507.sock -p Enter password: Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. (unknown)@localhost [(none)]>alter user user() identified by 'xxxx'; Query OK, 0 rows affected (0.00 sec) root@localhost [(none)]>grant all on *.* to 'wyz'@'%' identified by 'xxxx'; Query OK, 0 rows affected, 1 warning (0.00 sec)
- 關閉僞master實例
root@localhost [(none)]>shutdown; Query OK, 0 rows affected (0.00 sec)
- 複製binlog並假裝binlog環境
- 刪除初始binlog,複製備份binlog文件
- 製做mysql-bin.index文件,並修改logs目錄下全部文件權限爲mysql:mysql
[root@db210_00:24:25 /data/57mysql/mysql3507/logs] #ll total 12 -rw-r----- 1 mysql mysql 177 Aug 1 00:22 mysql-bin.000001 -rw-r----- 1 mysql mysql 716 Aug 1 00:24 mysql-bin.000002 -rw-r----- 1 mysql mysql 92 Aug 1 00:23 mysql-bin.index [root@db210_00:24:26 /data/57mysql/mysql3507/logs] #rm -rf mysql-bin.0* #ls /data/57mysql/mysql3507/logs/mysql-bin.0* >mysql-bin.index #chown mysql:mysql * #cat mysql-bin.index /data/57mysql/mysql3507/logs/mysql-bin.000010 /data/57mysql/mysql3507/logs/mysql-bin.000011 /data/57mysql/mysql3507/logs/mysql-bin.000012 /data/57mysql/mysql3507/logs/mysql-bin.000013 /data/57mysql/mysql3507/logs/mysql-bin.000014 /data/57mysql/mysql3507/logs/mysql-bin.000015 /data/57mysql/mysql3507/logs/mysql-bin.000016 /data/57mysql/mysql3507/logs/mysql-bin.000017 /data/57mysql/mysql3507/logs/mysql-bin.000018 /data/57mysql/mysql3507/logs/mysql-bin.000019 /data/57mysql/mysql3507/logs/mysql-bin.000020 [root@db210_00:29:28 /data/57mysql/mysql3507/logs] #ll total 2874136 -rw-r----- 1 mysql mysql 268435555 Aug 1 00:25 mysql-bin.000010 -rw-r----- 1 mysql mysql 268442595 Aug 1 00:25 mysql-bin.000011 -rw-r----- 1 mysql mysql 268442419 Aug 1 00:25 mysql-bin.000012 -rw-r----- 1 mysql mysql 268437857 Aug 1 00:25 mysql-bin.000013 -rw-r----- 1 mysql mysql 268438414 Aug 1 00:25 mysql-bin.000014 -rw-r----- 1 mysql mysql 268437131 Aug 1 00:25 mysql-bin.000015 -rw-r----- 1 mysql mysql 268436889 Aug 1 00:25 mysql-bin.000016 -rw-r----- 1 mysql mysql 268437011 Aug 1 00:25 mysql-bin.000017 -rw-r----- 1 mysql mysql 268441823 Aug 1 00:25 mysql-bin.000018 -rw-r----- 1 mysql mysql 268439288 Aug 1 00:25 mysql-bin.000019 -rw-r----- 1 mysql mysql 258700685 Aug 1 00:25 mysql-bin.000020 -rw-r----- 1 mysql mysql 506 Aug 1 00:25 mysql-bin.index
- 啓動假裝master實例,確認相關信息
-注意show master status中有一個增長了eaba29d3-94dd-11e8-91bf-0050568be82c:1-2,須要在slave 中gtid purged掉,不然會報1236錯誤(由於剛纔新建帳號產生的log已經被刪除了)
[root@db210_00:29:29 /data/57mysql/mysql3507/logs] #/usr/local/mysql57/bin/mysqld --defaults-file=/data/57mysql/mysql3507/my3506.cnf& [2] 19942 [root@db210_00:29:35 /data/57mysql/mysql3507/logs] #mysql -S /tmp/mysql3507.sock -pxxxx mysql: [Warning] Using a password on the command line interface can be insecure. Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 2 Server version: 5.7.23-log MySQL Community Server (GPL) Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. root@localhost [(none)]>show master logs; +------------------+-----------+ | Log_name | File_size | +------------------+-----------+ | mysql-bin.000010 | 268435555 | | mysql-bin.000011 | 268442595 | | mysql-bin.000012 | 268442419 | | mysql-bin.000013 | 268437857 | | mysql-bin.000014 | 268438414 | | mysql-bin.000015 | 268437131 | | mysql-bin.000016 | 268436889 | | mysql-bin.000017 | 268437011 | | mysql-bin.000018 | 268441823 | | mysql-bin.000019 | 268439288 | | mysql-bin.000020 | 258700685 | | mysql-bin.000021 | 194 | +------------------+-----------+ 12 rows in set (0.00 sec) root@localhost [(none)]>show master status; +------------------+----------+--------------+------------------+-------------------------------------------------------------------------------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set | +------------------+----------+--------------+------------------+-------------------------------------------------------------------------------------------+ | mysql-bin.000021 | 194 | | | 9e912d2b-92f6-11e8-9747-0050568be82c:1-10128895, eaba29d3-94dd-11e8-91bf-0050568be82c:1-2 | +------------------+----------+--------------+------------------+-------------------------------------------------------------------------------------------+ 1 row in set (0.00 sec)
- 在臨時slave(db211)上change master to 到僞master上.
gtid purged設置.9e912d2b-92f6-11e8-9747-0050568be82c:1-6730273爲xtrabackup_info中備份時記錄的,eaba29d3-94dd-11e8-91bf-0050568be82c:1-2爲搭建僞master過程當中創建帳號產生的.
root@localhost [(none)]>set global gtid_purged='9e912d2b-92f6-11e8-9747-0050568be82c:1-6730273,eaba29d3-94dd-11e8-91bf-0050568be82c:1-2';
root@localhost [(none)]>start slave io_thread;
root@localhost [(none)]>start slave sql_thread until sql_before_gtids='9e912d2b-92f6-11e8-9747-0050568be82c:9791090';
root@localhost [(none)]>show slave status\G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: db210
Master_User: wyz
Master_Port: 3507
Connect_Retry: 60
Master_Log_File: mysql-bin.000021
Read_Master_Log_Pos: 194
Relay_Log_File: relay-bin.000024
Relay_Log_Pos: 97871691
Relay_Master_Log_File: mysql-bin.000020
Slave_IO_Running: Yes
Slave_SQL_Running: No
Replicate_Do_DB:
Replicate_Ignore_DB:
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table:
Replicate_Wild_Ignore_Table:
Last_Errno: 0
Last_Error:
Skip_Counter: 0
Exec_Master_Log_Pos: 97871478
Relay_Log_Space: 258702241
Until_Condition: SQL_BEFORE_GTIDS
Until_Log_File:
Until_Log_Pos: 0
Master_SSL_Allowed: No
Master_SSL_CA_File:
Master_SSL_CA_Path:
Master_SSL_Cert:
Master_SSL_Cipher:
Master_SSL_Key:
Seconds_Behind_Master: NULL
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno: 0
Last_IO_Error:
Last_SQL_Errno: 0
Last_SQL_Error:
Replicate_Ignore_Server_Ids:
Master_Server_Id: 2103507
Master_UUID: eaba29d3-94dd-11e8-91bf-0050568be82c
Master_Info_File: /data/57mysql/mysql3506/data/master.info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State:
Master_Retry_Count: 86400
Master_Bind:
Last_IO_Error_Timestamp:
Last_SQL_Error_Timestamp:
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set: 9e912d2b-92f6-11e8-9747-0050568be82c:6730274-10128895
Executed_Gtid_Set: 9e912d2b-92f6-11e8-9747-0050568be82c:1-9791089,
eaba29d3-94dd-11e8-91bf-0050568be82c:1-2
Auto_Position: 1
Replicate_Rewrite_DB:
Channel_Name:
Master_TLS_Version:
1 row in set (0.00 sec)
ERROR:
No query specified
root@localhost [(none)]>select count(*) from wenyz.t2;
+----------+
| count(*) |
+----------+
| 163818 |
+----------+
1 row in set (0.11 sec)
- 至此數據已經回來了.導入master的工做就不在重複,參照方法一中.
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