Mysql 主主复制失败故障描述架构信息节点信息故障分析同步AipPRD2的从环境同步AIPPRD1的从环境
故障描述
| 原因描述 | 因为机柜PDU老化, 导致整个机柜掉电. |
| 故障时间 | 20160923-10:09 |
| 发现时间 | 20160929-13:56 |
架构信息
| Tomcat | Memcache | Keepalive | Mysql主主复制 |
节点信息
| 序号 | 节点名称 | IP地址 | 报错信息 |
| 1 | aipprd1 | 10.66.1.52 | Got fatal error 1236 from master when reading data from binary log: ‘binlog truncated in the middle of event; consider out of disk space on master; the first event ‘mysql-bin.000084’ at 91941417, the last event read from ‘/aip/mysql/data/log/mysql-bin.000084’ at 91941783, the last byte read from ‘/aip/mysql/data/log/mysql-bin.000084’ at 91942912.’ |
| 2 | aipprd2 | 10.66.1.51 | Got fatal error 1236 from master when reading data from binary log: ‘binlog truncated in the middle of event; consider out of disk space on master; the first event ‘mysql-bin.000082’ at 6369026, the last event read from ‘/aip/mysql/data/log/mysql-bin.000082’ at 6369026, the last byte read from ‘/aip/mysql/data/log/mysql-bin.000082’ at 6369280.’ |
故障分析
由于Zabbix的Mysql监控脚本的缘故, 没有触发事件, 所以直至20160929检查Zabbix日志的时候, 才发现该故障, 当时Keepalive的VIP在aipprd1上, 这个节点上, 数据库是对外服务的;那么首先以aipprd1为主, 先将aipprd2的从环境同步起来;待aipprd2从环境同步完成后, 再将aipprd1的从环境同步起来.
同步AIPPRD2的从环境
检查aipprd2的Slave状态 根据代码区的描述, Last_Errno的错误代码为1062, 需要手动修改Position.
[root@aipprd2 ~]# mysql -uzabbixmoniter -ppassw0rd -hlocalhost -e "show slave status/G;"*************************** 1. row *************************** Slave_IO_State: Master_Host: 10.66.1.52 Master_User: root Master_Port: 3388 Connect_Retry: 60 Master_Log_File: mysql-bin.000082 Read_Master_Log_Pos: 6369026 Relay_Log_File: mysql-relay-bin.000257 Relay_Log_Pos: 8999 Relay_Master_Log_File: mysql-bin.000082 Slave_IO_Running: No 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: 1062 Last_Error: Error 'Duplicate entry '93FF91EF92866D23E80E4A57D55ED538-n1.tomcat604' for key 'PRIMARY'' on query. Default database: 'aipprd'. Query: 'INSERT INTO eahttpsession ( sessionid, username, account, createtime, loginip,userid,explorer,userDomain,computerName,computerUserName) VALUES ('93FF91EF92866D23E80E4A57D55ED538-n1.tomcat604', '李花', 'XS003_4200', '2016-09-23 12:10:33', , '10752920','MSIE 7.0','','','')' Skip_Counter: 0 Exec_Master_Log_Pos: 6367510 Relay_Log_Space: 11099 Until_Condition: None 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: NULLMaster_SSL_Verify_Server_Cert: No Last_IO_Errno: 1236 Last_IO_Error: Got fatal error 1236 from master when reading data from binary log: 'binlog truncated in the middle of event; consider out of disk space on master; the first event 'mysql-bin.000082' at 6369026, the last event read from '/aip/mysql/data/log/mysql-bin.000082' at 6369026, the last byte read from '/aip/mysql/data/log/mysql-bin.000082' at 6369280.' Last_SQL_Errno: 1062 Last_SQL_Error: Error 'Duplicate entry '93FF91EF92866D23E80E4A57D55ED538-n1.tomcat604' for key 'PRIMARY'' on query. Default database: 'aipprd'. Query: 'INSERT INTO eahttpsession ( sessionid, username, account, createtime, loginip,userid,explorer,userDomain,computerName,computerUserName) VALUES ('93FF91EF92866D23E80E4A57D55ED538-n1.tomcat604', '李花', 'XS003_4200', '2016-09-23 12:10:33', , '10752920','MSIE 7.0','','','')'Replicate_Ignore_Server_Ids: Master_Server_Id: 1在aipprd2上按照Last_IO_Error中的Posfile和Pos修改. 按照报错给出的提示Posfile和Pos修改后, 报错依旧.
mysql> slave stop;mysql> CHANGE MASTER TO master_host='10.66.1.52', master_port=3388, master_user='root', master_passWord='passw0rd', master_log_file='mysql-bin.000082', master_log_pos=6369026;mysql> slave start;在aipprd2检查Mysql的日志 Mysql的日志中记录了Crash开始的时间, 并给出了建议, Fix the problem, and restart the slave SQL thread with "SLAVE START". We stopped at log 'mysql-bin.000082' position 6367510
160923 12:35:22 [Note] Starting crash recovery...160923 12:35:22 [Note] Crash recovery finished.160923 12:36:27 [ERROR] Error running query, slave SQL thread aborted. Fix the problem, and restart the slave SQL thread with "SLAVE START". We stopped at log 'mysql-bin.000082' position 6367510在aipprd2上按照日志中建议的Posfile和Pos修改. 按照日志中建议的Posfile和Pos修改后, 报错依旧.
mysql> slave stop;mysql> CHANGE MASTER TO master_host='10.66.1.52', master_port=3388, master_user='root', master_password='passw0rd', master_log_file='mysql-bin.000082', master_log_pos=6367510;mysql> slave start;在aipprd1上检查posfile 首先检查show slave status/G;中给出的pos, 发现日志中根本不存在.
[root@aipprd1 log]# mysqlbinlog --no-defaults --start-position=6369026 mysql-bin.000083 /*!40019 SET @@session.max_insert_delayed_threads=0*/;/*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/;DELIMITER /*!*/;# at 4#160923 12:38:59 server id 1 end_log_pos 107 Start: binlog v 4, server v 5.5.24-log created 160923 12:38:59 at startupROLLBACK/*!*/;BINLOG '47HkVw8BAAAAZwAAAGsAAAAAAAQANS41LjI0LWxvZwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAADjseRXEzgNAAgAEgAEBAQEEgAAVAAEGggAAAAICAgCAA=='/*!*/;ERROR: Error in Log_event::read_log_event(): 'read error', data_len: 912208946, event_type: 71ERROR: Could not read entry at offset 6369026: Error in log format or read error.DELIMITER # End of log fileROLLBACK /* added by mysqlbinlog */;/*!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/;此后检查Mysql日志中建议的pos, 发现posfile中是存在此记录的, 而此posfile的最后一个pos是6368660, 而show slave status/G;的pos是6369026, 显然不存在日志文件中.
[root@aipprd1 log]# mysqlbinlog --no-defaults --start-position=6367510 mysql-bin.000082 /*!40019 SET @@session.max_insert_delayed_threads=0*/;/*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/;DELIMITER /*!*/;# at 4#160923 10:39:15 server id 1 end_log_pos 107 Start: binlog v 4, server v 5.5.24-log created 160923 10:39:15 at startup# Warning: this binlog is either in use or was not closed properly.ROLLBACK/*!*/;BINLOG '05XkVw8BAAAAZwAAAGsAAAABAAQANS41LjI0LWxvZwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAADTleRXEzgNAAgAEgAEBAQEEgAAVAAEGggAAAAICAgCAA=='/*!*/; # at 6367510 # at 6367585 # at 6367963 # at 6367990 # at 6368073 # at 6368163 # at 6368275 # at 6368358 # at 6368558 # at 6368585 # at 6368660 # End of log fileROLLBACK /* added by mysqlbinlog */;/*!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/;最后在mysql-bin.000083中检查show slave status/G;提示pos:6369026, 也不存在.
[root@aipprd1 log]# mysqlbinlog --no-defaults --start-position=6369026 mysql-bin.000083 在aipprd2上重新发起修改posfile和pos操作 检查aipprd1上的日志, 既然mysql-bin.000082日志末不存在pos:6369026, 且mysql-bin.000083为下一个日志, 那么重新发起修改posfile和pos的操作.
[root@aipprd1 log]# lltotal 526908-rw-rw---- 1 mysql mysql 104858346 Sep 19 23:04 mysql-bin.000079-rw-rw---- 1 mysql mysql 104859112 Sep 22 13:01 mysql-bin.000080-rw-rw---- 1 mysql mysql 42558345 Sep 23 10:23 mysql-bin.000081-rw-rw---- 1 mysql mysql 6369280 Sep 23 12:13 mysql-bin.000082-rw-rw---- 1 mysql mysql 104857953 Sep 26 15:02 mysql-bin.000083-rw-rw---- 1 mysql mysql 70844542 Sep 27 17:42 mysql-bin.000084-rw-rw---- 1 mysql mysql 104858026 Sep 29 15:48 mysql-bin.000085-rw-rw---- 1 mysql mysql 297019 Sep 29 15:54 mysql-bin.000086-rw-rw---- 1 mysql mysql 296 Sep 29 15:48 mysql-bin.log.index-rw-rw---- 1 mysql mysql 107 Sep 27 18:05 mysql-relay-bin.000182-rw-rw---- 1 mysql mysql 43 Sep 27 18:05 mysql-relay-bin.index重新修改posfile为mysql-bin.000083, pos为0, 启动Slave后, 现在同步正常.
mysql> slave stop;mysql> CHANGE MASTER TO master_host='10.66.1.52', master_port=3388, master_user='root', master_password='passw0rd', master_log_file='mysql-bin.000083', master_log_pos=0;mysql> slave start;mysql> show slave status/G;*************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 10.66.1.52 Master_User: root Master_Port: 3388 Connect_Retry: 60 Master_Log_File: mysql-bin.000086 Read_Master_Log_Pos: 18585 Relay_Log_File: mysql-relay-bin.000002 Relay_Log_Pos: 8119286 Relay_Master_Log_File: mysql-bin.000083 Slave_IO_Running: Yes Slave_SQL_Running: Yes 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: 8119140 Relay_Log_Space: 280580804 Until_Condition: None 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: 521370Master_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: 11 row in set (0.00 sec)在同步的过程中, 发现有几个Last_SQL_Error: Error ‘Duplicate entry 1026的SQL Error, 这个是因为重复主键导致Slave停止工作, 执行以下操作解决(如果有多条重复的主键, 需要执行多次):
mysql> slave stop;mysql> set GLOBAL SQL_SLAVE_SKIP_COUNTER=1;mysql> slave start;还有另一种办法就是修改mysql配置文件/etc/my.cnf在[mysqld]下加一行slave_skip_errors = 1062 ,保存后重启mysql, mysql slave可以正常同步了.
同步AIPPRD1的从环境
检查aipprd1的Slave状态
mysql> show slave status/G;*************************** 1. row *************************** Slave_IO_State: Master_Host: 10.66.1.51 Master_User: root Master_Port: 3388 Connect_Retry: 60 Master_Log_File: mysql-bin.000084 Read_Master_Log_Pos: 91941783 Relay_Log_File: mysql-relay-bin.000002 Relay_Log_Pos: 296 Relay_Master_Log_File: mysql-bin.000084 Slave_IO_Running: No Slave_SQL_Running: Yes 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: 91941783 Relay_Log_Space: 452 Until_Condition: None 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: NULLMaster_SSL_Verify_Server_Cert: No Last_IO_Errno: 1236 Last_IO_Error: Got fatal error 1236 from master when reading data from binary log: 'binlog truncated in the middle of event; consider out of disk space on master; the first event 'mysql-bin.000084' at 91941417, the last event read from '/aip/mysql/data/log/mysql-bin.000084' at 91941783, the last byte read from '/aip/mysql/data/log/mysql-bin.000084' at 91942912.' Last_SQL_Errno: 0 Last_SQL_Error: Replicate_Ignore_Server_Ids: Master_Server_Id: 21 row in set (0.00 sec)在aipprd2上检查日志文件 在aipprd1上检查show slave status/G;后, 提示需要修改posfile为mysql-bin.000084和pos91942912, 因为在aipprd2同步完成后, 实际同步的数据是从aipprd1过来的, 这些数据在aipprd1上本身就存在的.
[root@aipprd2 log]# lltotal 653832-rw-rw---- 1 mysql mysql 104857774 Sep 21 13:12 mysql-bin.000083-rw-rw---- 1 mysql mysql 91942912 Sep 23 10:21 mysql-bin.000084-rw-rw---- 1 mysql mysql 6295552 Sep 23 12:10 mysql-bin.000085-rw-rw---- 1 mysql mysql 8250 Sep 27 17:39 mysql-bin.000086-rw-rw---- 1 mysql mysql 104858014 Sep 29 17:20 mysql-bin.000087-rw-rw---- 1 mysql mysql 104857971 Sep 29 19:18 mysql-bin.000088-rw-rw---- 1 mysql mysql 55744926 Sep 29 20:23 mysql-bin.000089-rw-rw---- 1 mysql mysql 259 Sep 29 19:18 mysql-bin.log.index-rw-rw---- 1 mysql mysql 70844718 Sep 29 15:35 mysql-relay-bin.000005-rw-rw---- 1 mysql mysql 104857729 Sep 29 15:44 mysql-relay-bin.000006-rw-rw---- 1 mysql mysql 708 Sep 29 15:44 mysql-relay-bin.000007-rw-rw---- 1 mysql mysql 199 Sep 29 15:44 mysql-relay-bin.000008-rw-rw---- 1 mysql mysql 25188420 Sep 30 08:40 mysql-relay-bin.000009-rw-rw---- 1 mysql mysql 215 Sep 29 18:42 mysql-relay-bin.index在aipprd2上检查show master status;后, 记录Posfile为mysql-bin.000089, 既然aipprd1的数据为最新的, 且aipprd2已经从aipprd1后同步完成了(通过检查show slave status/G;中的Seconds_Behind_Master:, 如果此项值很小, 应该是同步完成了.), 那么两边的数据应该差不多的.
mysql> show master status;+------------------+-----------+--------------+------------------+| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |+------------------+-----------+--------------+------------------+| mysql-bin.000089 | 104341982 | | |+------------------+-----------+--------------+------------------+1 row in set (0.00 sec)在aipprd1上发起修改posfile和pos操作 所以在此用posfile的mysql-bin.000089和pos的0来修改, 启动Slave后, 开始同步.
mysql> slave stop;Query OK, 0 rows affected (0.11 sec)mysql> CHANGE MASTER TO master_host='10.66.1.51', master_port=3388, master_user='root', master_password='passw0rd', master_log_file='mysql-bin.000089', master_log_pos=0;Query OK, 0 rows affected (0.06 sec)mysql> slave start;Query OK, 0 rows affected (0.00 sec)mysql> show slave status/G;*************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 10.66.1.51 Master_User: root Master_Port: 3388 Connect_Retry: 60 Master_Log_File: mysql-bin.000089 Read_Master_Log_Pos: 55744926 Relay_Log_File: mysql-relay-bin.000002 Relay_Log_Pos: 253 Relay_Master_Log_File: mysql-bin.000089 Slave_IO_Running: Yes Slave_SQL_Running: Yes 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: 55744926 Relay_Log_Space: 409 Until_Condition: None 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: 0Master_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: 21 row in set (0.00 sec)
