做mysql的slave監控的時候，需要check_mysql腳本，check的時候報錯：
error while loading shared libraries: libmysqlclient.so.18: cannot open shared object file: No such file or directory
1，錯誤資訊如下：
[[email protected] ~]# /usr/local/nagios/libexec/check_mysql -uadmin -P3306 -S /data/mbdata/open/mysql.sock -H127.0.0.1 -pxxxxx -d openshop -w 300 -c 360
/usr/local/nagios/libexec/check_mysql: error while loading shared libraries: libmysqlclient.so.18: cannot open shared object file: No such file or directory
[[email protected] ~]#
2，執行check_mysql --help看下指令，發現也不行。
[[email protected] ~]# /usr/local/nagios/libexec/check_mysql --help
/usr/local/nagios/libexec/check_mysql: error while loading shared libraries: libmysqlclient.so.18: cannot open shared object file: No such file or directory
[[email protected] ~]#
3，檢視一下報錯的libmysqlclient.so.18檔案是否存在：
[[email protected] ~]# find / -name libmysqlclient.so.18
/mysql-5.6.12/libmysql/libmysqlclient.so.18
/usr/local/mysql/lib/libmysqlclient.so.18
檔案存在，但是無法識别。
4，可能是libmysqlclient的問題
搜尋mysqlclient library linkage problem。
找到文章位址：http://stackoverflow.com/questions/2080679/mysqlclient-library-linkage-problem
發現有/etc/ld.so.conf.d/mysql-x86_64.conf這樣一個配置檔案，打開看看
cat /etc/ld.so.conf.d/mysql-x86_64.conf
[[email protected] ~]# cat /etc/ld.so.conf.d/mysql-x86_64.conf
/usr/lib64/mysql
進入目錄/usr/lib64/mysql檢視下有什麼檔案：
[[email protected] ~]# ll /usr/lib64/mysql
總用量 3108
lrwxrwxrwx. 1 root root 26 9月 29 2013 libmysqlclient_r.so.16 -> libmysqlclient_r.so.16.0.0
-rwxr-xr-x. 1 root root 1595176 12月 8 2012 libmysqlclient_r.so.16.0.0
lrwxrwxrwx. 1 root root 24 9月 29 2013 libmysqlclient.so.16 -> libmysqlclient.so.16.0.0
-rwxr-xr-x. 1 root root 1582952 12月 8 2012 libmysqlclient.so.16.0.0
有一些軟連接配接，而且帶了字尾表示so.16之類的，但是沒有so.18之類，看來是沒有連接配接到這裡，
可能是需要做一個軟連接配接把/usr/local/mysql/lib/libmysqlclient.so.18變成/usr/lib64/libmysqlclient.so.18，
馬上去做軟連接配接：ln -s /usr/local/mysql/lib/libmysqlclient.so.18 /usr/lib64/libmysqlclient.so.18，然後再check下。
[[email protected] ~]# ln -s /usr/local/mysql/lib/libmysqlclient.so.18 /usr/lib64/libmysqlclient.so.18
[[email protected] ~]#
[[email protected] ~]#
[[email protected] ~]# /usr/local/nagios/libexec/check_mysql --help
check_mysql v2.0 (nagios-plugins 2.0)
Copyright (c) 1999-2014 Nagios Plugin Development Team
This program tests connections to a MySQL server
Usage:
check_mysql [-d database] [-H host] [-P port] [-s socket]
[-u user] [-p password] [-S] [-l] [-a cert] [-k key]
[-C ca-cert] [-D ca-dir] [-L ciphers] [-f optfile] [-g group]
Options:
-h, --help
Print detailed help screen
-V, --version
Print version information
--extra-opts=[section][@file]
Read options from an ini file. See
https://www.nagios-plugins.org/doc/extra-opts.html
for usage and examples.
..................................
-l, --ssl
Use ssl encryptation
-C, --ca-cert=STRING
Path to CA signing the cert
-a, --cert=STRING
Path to SSL certificate
-k, --key=STRING
Path to private SSL key
-D, --ca-dir=STRING
Path to CA directory
-L, --ciphers=STRING
List of valid SSL ciphers
.................................................
Send email to [email protected] if you have questions regarding use
of this software. To submit patches or suggest improvements, send email to
[email protected]
[[email protected] ~]#
5，繼續執行check_mysql來check一下
[[email protected] ~]# /usr/local/nagios/libexec/check_mysql -unagios -P3306 -S -H127.0.0.1 --password='[email protected]' /usr/local/mysql/mysql.sock -d test -w 60 -c 100
slave query error: Access denied; you need (at least one of) the SUPER, REPLICATION CLIENT privilege(s) for this operation
[[email protected] ~]#
報賬号錯誤，
check
slave query error: Access denied; you need (at least one of) the SUPER, REPLICATION CLIENT privilege(s) for this operation
賬号錯誤，進入mysql界面賦予nagios賬号權限
mysql> GRANT PROCESS, SUPER, REPLICATION CLIENT ON *.* TO [email protected]'%' identified by '[email protected]';
6，再check
[[email protected] ~]# /usr/local/nagios/libexec/check_mysql -unagios -P3306 -S -Hlocalhost --password='[email protected]' -s /usr/local/mysql/mysql.sock -d test -w 60 -c 100
Slave IO: Yes Slave SQL: No Seconds Behind Master: (null)
mysql slave 檢測失敗，有錯誤資訊：Slave IO: Yes Slave SQL: No Seconds Behind Master: (null)
進mysql視窗去看詳細資訊:
[[email protected] ~]# mysql
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 23
Server version: 5.6.12-log Source distribution
Copyright (c) 2000, 2013, 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.
mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 10.xx.3.xx
Master_User: repl
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.010294
Read_Master_Log_Pos: 21764
Relay_Log_File: mysql-relay-bin.003125
Relay_Log_Pos: 91805
Relay_Master_Log_File: mysql-bin.010275
Slave_IO_Running: Yes
Slave_SQL_Running: No
Replicate_Do_DB: xx,xx_db,xxsystem
Replicate_Ignore_DB:
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table:
Replicate_Wild_Ignore_Table:
Last_Errno: 1590
Last_Error: The incident LOST_EVENTS occured on the master. Message: error writing to the binary log
Skip_Counter: 0
Exec_Master_Log_Pos: 91642
Relay_Log_Space: 1780004
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: NULL
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno: 0
Last_IO_Error:
Last_SQL_Errno: 1590
Last_SQL_Error: The incident LOST_EVENTS occured on the master. Message: error writing to the binary log
Replicate_Ignore_Server_Ids:
Master_Server_Id: 71
Master_UUID: 9b0dcf62-29f4-11e3-9471-677b33903869
Master_Info_File: mysql.slave_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: 140512 11:29:54
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set:
Executed_Gtid_Set:
Auto_Position: 0
1 row in set (0.00 sec)
mysql>
關于Slave IO: Yes Slave SQL: No Seconds Behind Master: (null)，參考blog： http://blog.csdn.net/mchdba/article/details/25738991
7，slave重做之後，再check，slave狀态是正常的。
# /usr/local/nagios/libexec/check_mysql -unagios -P3306 -S -s /usr/local/mysql/mysql.sock -Hlocalhost --password='[email protected]' -d test -w 60 -c 100
[[email protected] ~]# /usr/local/nagios/libexec/check_mysql -unagios -P3306 -S -s /usr/local/mysql/mysql.sock -Hlocalhost --password='[email protected]' -d test -w 60 -c 100
Uptime: 18431321 Threads: 3 Questions: 1447646 Slow queries: 735 Opens: 18605 Flush tables: 1 Open tables: 214 Queries per second avg: 0.078 Slave IO: Yes Slave SQL: Yes Seconds Behind Master: 0|Connections=1380c;;; Open_files=32;;; Open_tables=214;;; Qcache_free_memory=66980240;;; Qcache_hits=778c;;; Qcache_inserts=5338c;;; Qcache_lowmem_prunes=0c;;; Qcache_not_cached=12516c;;; Qcache_queries_in_cache=34;;; Queries=1447647c;;; Questions=99727c;;; Table_locks_waited=0c;;; Threads_connected=1;;; Threads_running=1;;; Uptime=18431321c;;; 'seconds behind master'=0.000000s;60.000000;100.000000;
[[email protected] ~]#