因为根目录磁盘满了，我移动数据和软件造成mysql启动不了，查原因mysql.sock不在了...

今天刚接手新项目的服务器，不知道以前谁搭建的

因为要备份数据库，但是发现空间不足

/根目录满的，然后我移动软件和文件

造成 mysql启动不了

1 2	root@localhost ~]# /data/mysql/bin/mysqldump  --databases star -uroot -p123456 > /home/star.sql mysqldump: Couldn't execute 'show fields from `c_help`': Got error 28 from storage engine (1030)

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[root@localhost ~]# df -lh Filesystem            Size  Used Avail Use% Mounted on /dev/sda3             2.0G  2.0G     0 100% / /dev/sda5             246G   29G  205G  13% /data /dev/sda1              99M   12M   82M  13% /boot tmpfs                 7.9G     0  7.9G   0% /dev/shm

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发现空间不足，也不知道谁搭建的服务器，坑死我了 root@localhost share]# mv * /data/ceshi/share/ [root@localhost share]# df -Th Filesystem    Type    Size  Used Avail Use% Mounted on /dev/sda3     ext3    2.0G  1.5G  382M  80% / /dev/sda5     ext3    246G   24G  209G  11% /data /dev/sda1     ext3     99M   12M   82M  13% /boot tmpfs        tmpfs    7.9G     0  7.9G   0% /dev/shm

mysql.sock不在了

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[root@localhost tmp]# locate mysql.sock [root@localhost tmp]# /data/mysql/ bin/        data/       include/    lib/        libexec/    log/        mysql-test/ share/      sql-bench/ [root@localhost tmp]# /data/mysql/bin/mysql start ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)

没有进程

1 2	[root@localhost tmp]# killall mysqld mysqld: no process killed

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[root@localhost tmp]# ps -aux | grep mysqld Warning: bad syntax, perhaps a bogus '-'? See /usr/share/doc/procps-3.2.7/FAQ root     22246  0.0  0.0  61196   720 pts/2    S+   13:14   0:00 grep mysqld

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[root@localhost tmp]# more /etc/my.cnf|grep sock socket=/var/lib/mysql/mysql.sock [root@localhost tmp]# cd /var/lib/mysql/mysql.s

太奇葩了这问题

查看报错日志

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140104  3:00:02 [ERROR] /data/mysql/libexec/mysqld: Sort aborted 140105  3:00:02 [ERROR] /data/mysql/libexec/mysqld: Sort aborted 140106  3:00:01 [ERROR] /data/mysql/libexec/mysqld: Sort aborted 140107  3:00:01 [ERROR] /data/mysql/libexec/mysqld: Sort aborted 140324 12:09:26 [Note] /data/mysql/libexec/mysqld: Normal shutdown 140324 12:09:26 [Note] Slave I/O thread killed while reading event 140324 12:09:26 [Note] Slave I/O thread exiting, read up to log 'mysql-bin.000013', position 54495054 140324 12:09:26 [Note] Error reading relay log event: slave SQL thread was killed 140324 12:09:44  InnoDB: Starting shutdown... 140324 12:09:46  InnoDB: Shutdown completed; log sequence number 0 1573472989 140324 12:09:46 [Note] /data/mysql/libexec/mysqld: Shutdown complete

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[root@localhost tmp]# ps -ef | grep mysqld root     22330 20131  0 13:24 pts/2    00:00:00 grep mysqld [root@localhost tmp]# ps -ef | grep mysql root     22332 20131  0 13:24 pts/2    00:00:00 grep mysql

发现

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[root@localhost mysql]# ./ bin/        data/       include/    lib/        libexec/    log/        mysql-test/ share/      sql-bench/ [root@localhost mysql]# ./bin/ comp_err                    mysqlbinlog                 mysql_find_rows             mysqltestmanagerc innochecksum                mysqlbug                    mysql_fix_extensions        mysqltestmanager-pwgen msql2mysql                  mysqlcheck                  mysql_fix_privilege_tables  mysql_tzinfo_to_sql myisamchk                   mysql_client_test           mysqlhotcopy                mysql_upgrade myisam_ftdump               mysql_config                mysqlimport                 mysql_upgrade_shell myisamlog                   mysql_convert_table_format  mysql_install_db            mysql_waitpid myisampack                  mysqld_multi                mysql_secure_installation   mysql_zap my_print_defaults           mysqld_safe                 mysql_setpermission         perror mysql                       mysqldump                   mysqlshow                   replace mysqlaccess                 mysqldumpslow               mysql_tableinfo             resolveip mysqladmin                  mysql_explain_log           mysqltest                   resolve_stack_dump [root@localhost mysql]# ./bin/mysqld_safe & [1] 22367 [root@localhost mysql]# Starting mysqld daemon with databases from /data/mysql/data [root@localhost mysql]# /data/mysql/bin/mysql -uroot -p123456 Welcome to the MySQL monitor.  Commands end with ; or \g. Your MySQL connection id is 15 Server version: 5.0.88-log Source distribution No entry for terminal type "xterm"; using dumb terminal settings. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql> Ctrl-C -- exit! Aborted [root@localhost mysql]# cd /tmp/ .ICE-unix/  mysql.sock [root@localhost mysql]# cd /tmp/

终于进去了

终于备份好了，为了以后不必要的麻烦，添加service管理

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[root@localhost data]# cp /data/mysql/share/mysql/mysql.server /etc/init.d/mysql [root@localhost data]# cd /etc/init.d/ [root@localhost init.d]# chkconfig --add mysql [root@localhost init.d]# chkconfig mysql on

这样方便多了

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[root@localhost init.d]# service mysql stop MySQL manager or server PID file could not be found!       [FAILED] [root@localhost init.d]# service mysql start Starting MySQL.                                            [  OK  ] [root@localhost init.d]# /data/mysql/bin/mysql -uroot -p Welcome to the MySQL monitor.  Commands end with ; or \g. Your MySQL connection id is 21 Server version: 5.0.88-log Source distribution No entry for terminal type "xterm"; using dumb terminal settings. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

终于解决了！

本文转自 cs312779641 51CTO博客，原文链接:http://blog.51cto.com/chenhao6/1382231