下面小編就為大家帶來一篇線上mysql同步報錯故障處理方法總結(必看篇)。小編覺得挺不錯的,現在就分享給大家,也給大家做個參考。一起跟隨小編過來看看吧
前言
在發生故障切換后,經常遇到的問題就是同步報錯,數據庫很小的時候,dump完再導入很簡單就處理好了,但線上的數據庫都150G-200G,如果用單純的這種方法,成本太高,故經過一段時間的摸索,總結了幾種處理方法。
生產環境架構圖
目前現網的架構,保存著兩份數據,通過異步復制做的高可用集群,兩臺機器提供對外服務。在發生故障時,切換到slave上,并將其變成master,壞掉的機器反向同步新的master,在處理故障時,遇到最多的就是主從報錯。下面是我收錄下來的報錯信息。
常見錯誤
最常見的3種情況
這3種情況是在HA切換時,由于是異步復制,且sync_binlog=0,會造成一小部分binlog沒接收完導致同步報錯。
第一種:在master上刪除一條記錄,而slave上找不到。
Last_SQL_Error:?Could?not?execute?Delete_rows?event?on?table?hcy.t1;? Can't?find?record?in?'t1',? Error_code:?1032;?handler?error?HA_ERR_KEY_NOT_FOUND;? the?event's?master?log?mysql-bin.000006,?end_log_pos?254
第二種:主鍵重復。在slave已經有該記錄,又在master上插入了同一條記錄。
Last_SQL_Error:?Could?not?execute?Write_rows?event?on?table?hcy.t1;? Duplicate?entry?'2'?for?key?'PRIMARY',? Error_code:?1062;? handler?error?HA_ERR_FOUND_DUPP_KEY;?the?event's?master?log?mysql-bin.000006,?end_log_pos?924
第三種:在master上mysql一條記錄,而slave上找不到,丟失了數據。
Last_SQL_Error:?Could?not?execute?Update_rows?event?on?table?hcy.t1; Can't?find?record?in?'t1',? Error_code:?1032;? handler?error?HA_ERR_KEY_NOT_FOUND;?the?event's?master?log?mysql-bin.000010,?end_log_pos?263
異步半同步區別
異步復制
簡單的說就是master把binlog發送過去,不管slave是否接收完,也不管是否執行完,這一動作就結束了.
半同步復制
簡單的說就是master把binlog發送過去,slave確認接收完,但不管它是否執行完,給master一個信號我這邊收到了,這一動作就結束了。(谷歌寫的代碼,5.5上正式應用。)
異步的劣勢
當master上寫操作繁忙時,當前POS點例如是10,而slave上IO_THREAD線程接收過來的是3,此時master宕機,會造成相差7個點未傳送到slave上而數據丟失。
特殊的情況
slave的中繼日志relay-bin損壞。
Last_SQL_Error:?Error?initializing?relay?log?position:?I/O?error?reading?the?header?from?the?binary?log Last_SQL_Error:?Error?initializing?relay?log?position:?Binlog?has?bad?magic?number;? It's?not?a?binary?log?file?that?can?be?used?by?this?version?of?MySQL
這種情況SLAVE在宕機,或者非法關機,例如電源故障、主板燒了等,造成中繼日志損壞,同步停掉。
人為失誤需謹慎:多臺slave存在重復server-id
這種情況同步會一直延時,永遠也同步不完,error錯誤日志里一直出現上面兩行信息。解決方法就是把server-id改成不一致即可。
Slave:?received?end?packet?from?server,?apparent?master?shutdown: Slave?I/O?thread:?Failed?reading?log?event,?reconnecting?to?retry,?log?'mysql-bin.000012'?at?postion?106
問題處理
刪除失敗
在master上刪除一條記錄,而slave上找不到。
Last_SQL_Error:?Could?not?execute?Delete_rows?event?on?table?hcy.t1;? Can't?find?record?in?'t1', Error_code:?1032;?handler?error?HA_ERR_KEY_NOT_FOUND;? the?event's?master?log?mysql-bin.000006,?end_log_pos?254
解決方法:
由于master要刪除一條記錄,而slave上找不到故報錯,這種情況主上都將其刪除了,那么從機可以直接跳過。可用命令:
stop?slave; set?global?sql_slave_skip_counter=1; start?slave;
如果這種情況很多,可用我寫的一個腳本skip_error_replcation.sh,默認跳過10個錯誤(只針對這種情況才跳,其他情況輸出錯誤結果,等待處理),這個腳本是參考maakit工具包的mk-slave-restart原理用shell寫的,功能上定義了一些自己的東西,不是無論什么錯誤都一律跳過。)
主鍵重復
在slave已經有該記錄,又在master上插入了同一條記錄。
Last_SQL_Error:?Could?not?execute?Write_rows?event?on?table?hcy.t1;? Duplicate?entry?'2'?for?key?'PRIMARY',? Error_code:?1062;? handler?error?HA_ERR_FOUND_DUPP_KEY;?the?event's?master?log?mysql-bin.000006,?end_log_pos?924
解決方法:
在slave上用desc hcy.t1; 先看下表結構:
mysql>?desc?hcy.t1; +-------+---------+------+-----+---------+-------+ |?Field?|?Type??|?Null?|?Key?|?Default?|?Extra?| +-------+---------+------+-----+---------+-------+ |?id??|?int(11)?|?NO??|?PRI?|?0????|????|? |?name?|?char(4)?|?YES?|???|?NULL??|????|? +-------+---------+------+-----+---------+-------+
刪除重復的主鍵
mysql>?delete?from?t1?where?id=2; Query?OK,?1?row?affected?(0.00?sec) mysql>?start?slave; Query?OK,?0?rows?affected?(0.00?sec) mysql>?show?slave?statusG; …… Slave_IO_Running:?Yes Slave_SQL_Running:?Yes …… mysql>?select?*?from?t1?where?id=2;
在master上和slave上再分別確認一下。
更新丟失
在master上更新一條記錄,而slave上找不到,丟失了數據。
Last_SQL_Error:?Could?not?execute?Update_rows?event?on?table?hcy.t1;? Can't?find?record?in?'t1',? Error_code:?1032;? handler?error?HA_ERR_KEY_NOT_FOUND;? the?event's?master?log?mysql-bin.000010,?end_log_pos?794
解決方法:
在master上,用mysqlbinlog 分析下出錯的binlog日志在干什么。
/usr/local/mysql/bin/mysqlbinlog?--no-defaults?-v?-v?--base64-output=DECODE-ROWS?mysql-bin.000010?|?grep?-A?'10'?794 #120302?12:08:36?server?id?22?end_log_pos?794?Update_rows:?table?id?33?flags:?STMT_END_F ###?UPDATE?hcy.t1 ###?WHERE ###??@1=2?/*?INT?meta=0?nullable=0?is_null=0?*/ ###??@2='bbc'?/*?STRING(4)?meta=65028?nullable=1?is_null=0?*/ ###?SET ###??@1=2?/*?INT?meta=0?nullable=0?is_null=0?*/ ###??@2='BTV'?/*?STRING(4)?meta=65028?nullable=1?is_null=0?*/ #?at?794 #120302?12:08:36?server?id?22?end_log_pos?821?Xid?=?60 COMMIT/*!*/; DELIMITER?; #?End?of?log?file ROLLBACK?/*?added?by?mysqlbinlog?*/; /*!50003?SET?COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/;
在slave上,查找下更新后的那條記錄,應該是不存在的。
mysql>?select?*?from?t1?where?id=2; Empty?set?(0.00?sec)
然后再到master查看
mysql>?select?*?from?t1?where?id=2; +----+------+ |?id?|?name?| +----+------+ |?2?|?BTV?|? +----+------+ 1?row?in?set?(0.00?sec)
把丟失的數據在slave上填補,然后跳過報錯即可。
mysql>?insert?into?t1?values?(2,'BTV'); Query?OK,?1?row?affected?(0.00?sec) mysql>?select?*?from?t1?where?id=2;?? +----+------+ |?id?|?name?| +----+------+ |?2?|?BTV?|? +----+------+ 1?row?in?set?(0.00?sec) mysql>?stop?slave?;set?global?sql_slave_skip_counter=1;start?slave; Query?OK,?0?rows?affected?(0.01?sec) Query?OK,?0?rows?affected?(0.00?sec) Query?OK,?0?rows?affected?(0.00?sec) mysql>?show?slave?statusG; …… ?Slave_IO_Running:?Yes ?Slave_SQL_Running:?Yes ……
中繼日志損壞
slave的中繼日志relay-bin損壞。
Last_SQL_Error:?Error?initializing?relay?log?position:?I/O?error?reading?the?header?from?the?binary?log Last_SQL_Error:?Error?initializing?relay?log?position:?Binlog?has?bad?magic?number;? It's?not?a?binary?log?file?that?can?be?used?by?this?version?of?MySQL
手工修復
解決方法:找到同步的binlog和POS點,然后重新做同步,這樣就可以有新的中繼日值了。
例子:
mysql>?show?slave?statusG; ***************************?1.?row?*************************** ???????Master_Log_File:?mysql-bin.000010 ?????Read_Master_Log_Pos:?1191 ????????Relay_Log_File:?vm02-relay-bin.000005 ????????Relay_Log_Pos:?253 ????Relay_Master_Log_File:?mysql-bin.000010 ???????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:?1593 ??????????Last_Error:?Error?initializing?relay?log?position:?I/O?error?reading?the?header?from?the?binary?log ?????????Skip_Counter:?1 ?????Exec_Master_Log_Pos:?821
Slave_IO_Running :接收master的binlog信息???????
Master_Log_File
?????????????????? Read_Master_Log_Pos
Slave_SQL_Running:執行寫操作
?????????????????? Relay_Master_Log_File
?????????????????? Exec_Master_Log_Pos
以執行寫的binlog和POS點為準。
Relay_Master_Log_File:?mysql-bin.000010 Exec_Master_Log_Pos:?821 mysql>?stop?slave; Query?OK,?0?rows?affected?(0.01?sec) mysql>?CHANGE?MASTER?TO?MASTER_LOG_FILE='mysql-bin.000010',MASTER_LOG_POS=821; Query?OK,?0?rows?affected?(0.01?sec) mysql>?start?slave; Query?OK,?0?rows?affected?(0.00?sec) mysql>?show?slave?statusG; ***************************?1.?row?*************************** ????????Slave_IO_State:?Waiting?for?master?to?send?event ?????????Master_Host:?192.168.8.22 ?????????Master_User:?repl ?????????Master_Port:?3306 ????????Connect_Retry:?10 ???????Master_Log_File:?mysql-bin.000010 ?????Read_Master_Log_Pos:?1191 ????????Relay_Log_File:?vm02-relay-bin.000002 ????????Relay_Log_Pos:?623 ????Relay_Master_Log_File:?mysql-bin.000010 ???????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:?1191 ???????Relay_Log_Space:?778 ???????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:?0 Master_SSL_Verify_Server_Cert:?No ????????Last_IO_Errno:?0 ????????Last_IO_Error:? ????????Last_SQL_Errno:?0 ????????Last_SQL_Error:? Ibbackup
各種大招都用上了,無奈slave數據丟失過多,ibbackup(需要銀子)該你登場了。
Ibbackup熱備份工具,是付費的。xtrabackup是免費的,功能上一樣。
Ibbackup備份期間不鎖表,備份時開啟一個事務(相當于做一個快照),然后會記錄一個點,之后數據的更改保存在ibbackup_logfile文件里,恢復時把ibbackup_logfile 變化的數據再寫入到ibdata里。
Ibbackup 只備份數據( ibdata、.ibd ),表結構.frm不備份。
下面一個演示例子:
備份:ibbackup /bak/etc/my_local.cnf /bak/etc/my_bak.cnf
恢復:ibbackup –apply-log /bak/etc/my_bak.cnf
[root@vm01?etc]#?more?my_local.cnf? datadir?=/usr/local/mysql/data innodb_data_home_dir?=?/usr/local/mysql/data innodb_data_file_path?=?ibdata1:10M:autoextend innodb_log_group_home_dir?=?/usr/local/mysql/data innodb_buffer_pool_size?=?100M innodb_log_file_size?=?5M innodb_log_files_in_group=2 [root@vm01?etc]#?ibbackup?/bak/etc/my_local.cnf?/bak/etc/my_bak.cnf? InnoDB?Hot?Backup?version?3.0.0;?Copyright?2002-2005?Innobase?Oy License?A21488?is?granted?to?vm01?(chunyang_he@126.com) (--apply-log?works?in?any?computer?regardless?of?the?hostname) Licensed?for?use?in?a?computer?whose?hostname?is?'vm01' Expires?2012-5-1?(year-month-day)?at?00:00 See?http://www.innodb.com?for?further?information Type?ibbackup?--license?for?detailed?license?terms,?--help?for?help Contents?of?/bak/etc/my_local.cnf: innodb_data_home_dir?got?value?/usr/local/mysql/data innodb_data_file_path?got?value?ibdata1:10M:autoextend datadir?got?value?/usr/local/mysql/data innodb_log_group_home_dir?got?value?/usr/local/mysql/data innodb_log_files_in_group?got?value?2 innodb_log_file_size?got?value?5242880 Contents?of?/bak/etc/my_bak.cnf: innodb_data_home_dir?got?value?/bak/data innodb_data_file_path?got?value?ibdata1:10M:autoextend datadir?got?value?/bak/data innodb_log_group_home_dir?got?value?/bak/data innodb_log_files_in_group?got?value?2 innodb_log_file_size?got?value?5242880 ibbackup:?Found?checkpoint?at?lsn?0?1636898 ibbackup:?Starting?log?scan?from?lsn?0?1636864 120302?16:47:43?ibbackup:?Copying?log... 120302?16:47:43?ibbackup:?Log?copied,?lsn?0?1636898 ibbackup:?We?wait?1?second?before?starting?copying?the?data?files... 120302?16:47:44?ibbackup:?Copying?/usr/local/mysql/data/ibdata1 ibbackup:?A?copied?database?page?was?modified?at?0?1636898 ibbackup:?Scanned?log?up?to?lsn?0?1636898 ibbackup:?Was?able?to?parse?the?log?up?to?lsn?0?1636898 ibbackup:?Maximum?page?number?for?a?log?record?0 120302?16:47:46?ibbackup:?Full?backup?completed! [root@vm01?etc]# [root@vm01?etc]#?cd?/bak/data/ [root@vm01?data]#?ls ibbackup_logfile?ibdata1 [root@vm01?data]#?ibbackup?--apply-log?/bak/etc/my_bak.cnf? InnoDB?Hot?Backup?version?3.0.0;?Copyright?2002-2005?Innobase?Oy License?A21488?is?granted?to?vm01?(chunyang_he@126.com) (--apply-log?works?in?any?computer?regardless?of?the?hostname) Licensed?for?use?in?a?computer?whose?hostname?is?'vm01' Expires?2012-5-1?(year-month-day)?at?00:00 See?http://www.innodb.com?for?further?information Type?ibbackup?--license?for?detailed?license?terms,?--help?for?help Contents?of?/bak/etc/my_bak.cnf: innodb_data_home_dir?got?value?/bak/data innodb_data_file_path?got?value?ibdata1:10M:autoextend datadir?got?value?/bak/data innodb_log_group_home_dir?got?value?/bak/data innodb_log_files_in_group?got?value?2 innodb_log_file_size?got?value?5242880 120302?16:48:38?ibbackup:?ibbackup_logfile's?creation?parameters: ibbackup:?start?lsn?0?1636864,?end?lsn?0?1636898, ibbackup:?start?checkpoint?0?1636898 ibbackup:?start?checkpoint?0?1636898 InnoDB:?Doing?recovery:?scanned?up?to?log?sequence?number?0?1636898 InnoDB:?Starting?an?apply?batch?of?log?records?to?the?database... InnoDB:?Progress?in?percents:?0?1?2?3?4?5?6?7?8?9?10?11?12?13?14?15?.....99 Setting?log?file?size?to?0?5242880 ibbackup:?We?were?able?to?parse?ibbackup_logfile?up?to ibbackup:?lsn?0?1636898 ibbackup:?Last?MySQL?binlog?file?position?0?1191,?file?name?./mysql-bin.000010 ibbackup:?The?first?data?file?is?'/bak/data/ibdata1' ibbackup:?and?the?new?created?log?files?are?at?'/bak/data/' 120302?16:48:38?ibbackup:?Full?backup?prepared?for?recovery?successfully! [root@vm01?data]#?ls ibbackup_logfile?ibdata1?ib_logfile0?ib_logfile1
把ibdata1 ib_logfile0 ib_logfile1拷貝到從,把.frm也拷貝過去,啟動MySQL后,做同步,那個點就是上面輸出的:
ibbackup:?Last?MySQL?binlog?file?position?0?1191,?file?name?./mysql-bin.000010 CHANGE?MASTER?TO?MASTER_LOG_FILE='mysql-bin.000010',MASTER_LOG_POS=1191;
Maatkit工具包
簡介
maatkit是一個開源的工具包,為mysql日常管理提供了幫助。目前,已被Percona公司收購并維護。其中:
mk-table-checksum是用來檢測master和slave上的表結構和數據是否一致。
mk-table-sync是發生主從數據不一致時,來修復的。
這兩個工具包,沒有在現網實際操作的經驗,這里僅僅是新技術探討和學術交流,下面展示下如何使用。
[root@vm02]#?mk-table-checksum?h=vm01,u=admin,p=123456?h=vm02,u=admin,p=123456?-d?hcy?-t?t1 Cannot?connect?to?MySQL?because?the?Perl?DBI?module?is?not?installed?or?not?found.? Run?'perl?-MDBI'?to?see?the?directories?that?Perl?searches?for?DBI. If?DBI?is?not?installed,?try: ?Debian/Ubuntu?apt-get?install?libdbi-perl ?RHEL/CentOS??yum?install?perl-DBI ?OpenSolaris??pgk?install?pkg:/SUNWpmdbi
提示缺少perl-DBI模塊,那么直接 yum install perl-DBI。
[root@vm02?bin]#?mk-table-checksum?h=vm01,u=admin,p=123456?h=vm02,u=admin,p=123456?-d?hcy?-t?t1 DATABASE?TABLE?CHUNK?HOST?ENGINE???COUNT?????CHECKSUM?TIME?WAIT?STAT?LAG hcy???t1????0?vm02?InnoDB????NULL????1957752020??0??0?NULL?NULL hcy???t1????0?vm01?InnoDB????NULL????1957752020??0??0?NULL?NULL
如果表數據不一致,CHECKSUM的值是不相等的。
解釋下輸出的意思:
DATABASE:數據庫名
TABLE:表名
CHUNK:checksum時的近似數值
HOST:MYSQL的地址
ENGINE:mysql
COUNT:表的行數
CHECKSUM:校驗值
TIME:所用時間
WAIT:等待時間
STAT:MASTER_POS_WAIT()返回值
LAG:slave的延時時間
如果你想過濾出不相等的都有哪些表,可以用mk-checksum-filter這個工具,只要在后面加個管道符就行了。
[root@vm02?~]#?mk-table-checksum?h=vm01,u=admin,p=123456?h=vm02,u=admin,p=123456?-d?hcy?|?mk-checksum-filter???? hcy???t2????0?vm01?InnoDB????NULL????1957752020??0??0?NULL?NULL hcy???t2????0?vm02?InnoDB????NULL????1068689114??0??0?NULL?NULL
知道有哪些表不一致,可以用mk-table-sync這個工具來處理。
注:在執行mk-table-checksum時會鎖表,表的大小取決于執行的快慢。
MASTER上的t2表數據:
SLAVE上的t2表數據:
mysql>?select?*?from?t2;?????????mysql>?select?*?from?t2;?? +----+------+???????????????+----+------+ |?id?|?name?|???????????????|?id?|?name?| +----+------+???????????????+----+------+ |?1?|?a??|???????????????|?1?|?a??|? |?2?|?b??|???????????????|?2?|?b??|? |?3?|?ss??|???????????????|?3?|?ss??|? |?4?|?asd?|???????????????|?4?|?asd?|? |?5?|?ss??|???????????????+----+------+ +----+------+???????????????4?rows?in?set?(0.00?sec) 5?rows?in?set?(0.00?sec)? ?????????????????????mysql>?!?hostname;? mysql>?!?hostname;????????????vm02???? vm01? [root@vm02?~]#?mk-table-sync?--execute?--print?--no-check-slave?--transaction?--databases?hcy?h=vm01,u=admin,p=123456?h=vm02,u=admin,p=123456? INSERT?INTO?`hcy`.`t2`(`id`,?`name`)?VALUES?('5',?'ss')?/*maatkit?src_db:hcy?src_tbl:t2?src_dsn:h=vm01,p=...,u=admin?dst_db:hcy?dst_tbl:t2? dst_dsn:h=vm02,p=...,u=admin?lock:0?transaction:1?changing_src:0?replicate:0?bidirectional:0?pid:3246?user:root?host:vm02*/;
它的工作原理是:先一行一行檢查主從庫的表是否一樣,如果哪里不一樣,就執行刪除,更新,插入等操作,使其達到一致。表的大小決定著執行的快慢。
If?C?is?specified,?C<lock>?is?not?used.?Instead,?lock and?unlock?are?implemented?by?beginning?and?committing?transactions. The?exception?is?if?L?is?3. If?C?is?specified,?then?C<lock>?is?used?for?any value?of?L.?See?L. When?enabled,?either?explicitly?or?implicitly,?the?transaction?isolation?level is?set?C<repeatable>?and?transactions?are?started?C<with snapshot></with></repeatable></lock></lock>
MySQL復制監控
MySQL常見錯誤類型
1005:創建表失敗
1006:mysql失敗
1007:數據庫已存在,創建數據庫失敗
1008:數據庫不存在,刪除數據庫失敗
1009:不能刪除數據庫文件導致刪除數據庫失敗
1010:不能刪除數據目錄導致刪除數據庫失敗
1011:刪除數據庫文件失敗
1012:不能讀取系統表中的記錄
1020:記錄已被其他用戶修改
1021:硬盤剩余空間不足,請加大硬盤可用空間
1022:關鍵字重復,更改記錄失敗
1023:關閉時發生錯誤
1024:讀文件錯誤
1025:更改名字時發生錯誤
1026:寫文件錯誤
1032:記錄不存在
1036:數據表是只讀的,不能對它進行修改
1037:系統內存不足,請重啟數據庫或重啟服務器
1038:用于排序的內存不足,請增大排序緩沖區
1040:已到達數據庫的最大連接數,請加大數據庫可用連接數
1041:系統內存不足
1042:無效的主機名
1043:無效連接
1044:當前用戶沒有訪問數據庫的權限
1045:不能mysql,用戶名或密碼錯誤
1048:字段不能為空
1049:數據庫不存在
1050:數據表已存在
1051:數據表不存在
1054:字段不存在
1065:無效的SQL語句,SQL語句為空
1081:不能建立Socket連接
1114:數據表已滿,不能容納任何記錄
1116:打開的數據表太多
1129:數據庫出現異常,請重啟數據庫
1130:連接數據庫失敗,沒有連接數據庫的權限
1133:數據庫用戶不存在
1141:當前用戶無權訪問數據庫
1142:當前用戶無權訪問數據表
1143:當前用戶無權訪問數據表中的字段
1146:數據表不存在
1147:未定義用戶對數據表的訪問權限
1149:SQL語句mysql
1158:網絡錯誤,出現讀錯誤,請檢查網絡連接狀況
1159:網絡錯誤,讀超時,請檢查網絡連接狀況
1160:網絡錯誤,出現寫錯誤,請檢查網絡連接狀況
1161:網絡錯誤,寫超時,請檢查網絡連接狀況
1062:字段值重復,入庫失敗
1169:字段值重復,更新記錄失敗
1177:打開數據表失敗
1180:提交事務失敗
1181:回滾事務失敗
1203:當前用戶和數據庫建立的連接已到達數據庫的最大連接數,請增大可用的數據庫連接數或重啟數據庫
1205:加鎖超時
1211:當前用戶沒有創建用戶的權限
1216:外鍵mysql檢查失敗,更新子表記錄失敗
1217:外鍵約束檢查失敗,刪除或修改主表記錄失敗
1226:當前用戶使用的資源已超過所允許的資源,請重啟數據庫或重啟服務器
1227:權限不足,您無權進行此操作
1235:MySQL版本過低,不具有本功能
復制監控腳本
參考原文修改。
原腳本
#!/bin/bash # #check_mysql_slave_replication_status # # # parasum=2 help_msg(){ ? cat??$SlaveStatusFile echo?""?>> ?$SlaveStatusFile ? #get ?slave?status ${MYSQL_CMD} ?-e?"show ?slave?statusG"?>> ?$SlaveStatusFile?#取得salve進程的狀態 ? #get ?io_thread_status,sql_thread_status,last_errno??取得以下狀態值 ? IOStatus=$(cat?$SlaveStatusFile|grep?Slave_IO_Running|awk?'{print ?$2}') SQLStatus=$(cat?$SlaveStatusFile|grep?Slave_SQL_Running ?|awk?'{print ?$2}') ??Errno=$(cat?$SlaveStatusFile|grep?Last_Errno ?|?awk?'{print ?$2}') ??Behind=$(cat?$SlaveStatusFile|grep?Seconds_Behind_Master ?|?awk?'{print ?$2}') ? echo?""?>> ?$SlaveStatusFile ? if?[ "$IOStatus"?== "No"?] ?||?[?"$SQLStatus"?== "No"?];then??#判斷錯誤類型 ????if?[ "$Errno"?-eq?0 ?];then??#可能是salve線程未啟動 ??????$MYSQL_CMD ?-e?"start ?slave?io_thread;start?slave?sql_thread;" ??????echo?"Cause ?slave?threads?doesnot's?running,trying?start?slsave?io_thread;start?slave?sql_thread;"?>> ?$SlaveStatusFile ??????MailTitle="[Warning] ?Slave?threads?stoped?on?$HOST_IP?$HOST_PORT" ????elif?[ "$Errno"?-eq?1007 ?]?||?[?"$Errno"?-eq?1053 ?]?||?[?"$Errno"?-eq?1062 ?]?||?[?"$Errno"?-eq?1213 ?]?||?[?"$Errno"?-eq?1032 ?] ??????|| ?[?"Errno"?-eq?1158 ?]?||?[?"$Errno"?-eq?1159 ?]?||?[?"$Errno"?-eq?1008 ?];then?#忽略此些錯誤 ??????$MYSQL_CMD ?-e?"stop ?slave;set?global?sql_slave_skip_counter=1;start?slave;" ??????echo?"Cause ?slave?replication?catch?errors,trying?skip?counter?and?restart?slave;stop?slave?;set?global?sql_slave_skip_counter=1;slave?start;"?>> ?$SlaveStatusFile ??????MailTitle="[Warning] ?Slave?error?on?$HOST_IP?$HOST_PORT!?ErrNum:?$Errno" ????else ??????echo?"Slave ?$HOST_IP?$HOST_PORT?is?down!"?>> ?$SlaveStatusFile ??????MailTitle="[ERROR]Slave ?replication?is?down?on?$HOST_IP?$HOST_PORT?!?ErrNum:$Errno" ????fi fi if?[ ?-n?"$Behind"?];then ????Behind=0 fi echo?"$Behind"?>> ?$SlaveStatusFile ? #delay ?behind?master?判斷延時時間 if?[ ?$Behind?-gt?300?];then ??echo?`date?+"%Y-%m%d ?%H:%M:%S"` "slave ?is?behind?master?$Bebind?seconds!"?>> ?$SlaveStatusFile ??MailTitle="[Warning]Slave ?delay?$Behind?seconds,from?$HOST_IP?$HOST_PORT" fi ? if?[ ?-n?"$MailTitle"?];then?#若出錯或者延時時間大于300s則發送郵件 ????cat?${SlaveStatusFile} ?|?/bin/mail?-s "$MailTitle"?$Mail_Address_MysqlStatus fi ? #del ?tmpfile:SlaveStatusFile > ?$SlaveStatusFile
修改后腳本
只做了簡單的整理,修正了Behind為NULL的判斷,但均未測試;
應可考慮增加:
對修復執行結果的判斷;多條錯誤的mysql修復、檢測、再修復?
取消SlaveStatusFile臨時文件。
Errno、Behind兩種告警分別發郵件,告警正文增加show slave結果原文。
增加PATH,以便加到crontab中。
考慮crontab中周期執行(加鎖避免執行沖突、執行周期選擇)
增加執行日志?
#!/bin/sh # ?check_mysql_slave_replication_status # ?參考:http://www.tianfeiyu.com/?p=2062 ? Usage(){ ??echo?Usage: ??echo?"$0 ?HOST?PORT?USER?PASS" } ? [ ?-z?"$1"?-o ?-z?"$2"?-o ?-z?"$3"?-o ?-z?"$4"?] ?&&?Usage?&&?exit?1 HOST=$1 PORT=$2 USER=$3 PASS=$4 ? MYSQL_CMD="mysql ?-h$HOST?-P$PORT?-u$USER?-p$PASS" ? MailTitle=""????????#郵件主題 Mail_Address_MysqlStatus="root@localhost.localdomain"??#收件人郵箱?? ? time1=$(date?+"%Y%m%d%H%M%S") time2=$(date?+"%Y-%m-%d ?%H:%M:%S") ? SlaveStatusFile=/tmp/salve_status_${HOST_PORT}.${time1}? #郵件內容所在文件 echo?"--------------------Begin ?at:?"$time2 ?>?$SlaveStatusFile echo?""?>> ?$SlaveStatusFile ? #get ?slave?status ${MYSQL_CMD} ?-e?"show ?slave?statusG"?>> ?$SlaveStatusFile?#取得salve進程的狀態 ? #get ?io_thread_status,sql_thread_status,last_errno??取得以下狀態值 ? ?IOStatus=$(cat?$SlaveStatusFile|grep?Slave_IO_Running|awk?'{print ?$2}') SQLStatus=$(cat?$SlaveStatusFile|grep?Slave_SQL_Running ?|awk?'{print ?$2}') ??Errno=$(cat?$SlaveStatusFile|grep?Last_Errno ?|?awk?'{print ?$2}') ??Behind=$(cat?$SlaveStatusFile|grep?Seconds_Behind_Master ?|?awk?'{print ?$2}') ? echo?""?>> ?$SlaveStatusFile ? if?[ "$IOStatus"?= "No"?-o "$SQLStatus"?= "No"?];then ??case?"$Errno"?in ??0) ????# ?可能是slave未啟動 ????$MYSQL_CMD ?-e?"start ?slave?io_thread;start?slave?sql_thread;" ????echo?"Cause ?slave?threads?doesnot's?running,trying?start?slsave?io_thread;start?slave?sql_thread;"?>> ?$SlaveStatusFile ????;; ??1007|1053|1062|1213|1032|1158|1159|1008) ????# ?忽略這些錯誤 ????$MYSQL_CMD ?-e?"stop ?slave;set?global?sql_slave_skip_counter=1;start?slave;" ????echo?"Cause ?slave?replication?catch?errors,trying?skip?counter?and?restart?slave;stop?slave?;set?global?sql_slave_skip_counter=1;slave?start;"?>> ?$SlaveStatusFile ????MailTitle="[Warning] ?Slave?error?on?$HOST:$PORT!?ErrNum:?$Errno" ????;; ??*) ????echo?"Slave ?$HOST:$PORT?is?down!"?>> ?$SlaveStatusFile ????MailTitle="[ERROR]Slave ?replication?is?down?on?$HOST:$PORT!?Errno:$Errno" ????;; ??esac fi ? if?[ "$Behind"?= "NULL"?-o ?-z?"$Behind"?];then ??Behind=0 fi echo?"Behind:$Behind"?>> ?$SlaveStatusFile ? #delay ?behind?master?判斷延時時間 if?[ ?$Behind?-gt?300?];then ??echo?`date?+"%Y-%m%d ?%H:%M:%S"` "slave ?is?behind?master?$Bebind?seconds!"?>> ?$SlaveStatusFile ??MailTitle="[Warning]Slave ?delay?$Behind?seconds,from?$HOST?$PORT" fi ? if?[ ?-n?"$MailTitle"?];then?#若出錯或者延時時間大于300s則發送郵件 ??cat?${SlaveStatusFile} ?|?/bin/mail?-s "$MailTitle"?$Mail_Address_MysqlStatus fi ? #del ?tmpfile:SlaveStatusFile > ?$SlaveStatusFile