小記一次mysql啟動失敗沒有日志的處理

本來mysql好的，之前清理了一次tmp下的東西，mysql在查詢的時候提示：

Can't create/write to file '/tmp/ib0n3frL

然后停止啟動：

[root@sevck_linux mysql]# service mysqld start
MySQL Daemon failed to start.
Starting mysqld: [FAILED]

啟動失敗了，看一下日志，發現配置的時候沒添加日志配置

查找my.cnf,在[mysqld]下添加log-error=/var/log/mysql/mysql-error.log

配置mysql的錯誤日志，mysql目錄自行設置，其中記住一點，chown -R mysql:mysql /tmp/mysql

賦予mysql目錄權限，因為我是root, mysql運行權限為mysql，沒有權限

再啟動mysql嘗試：

180222 10:45:28 InnoDB: Mutexes and rw_locks use GCC atomic builtins
180222 10:45:28 InnoDB: Compressed tables use zlib 1.2.3
180222 10:45:28 InnoDB: Using Linux native AIO
^G/usr/libexec/mysqld: Can't create/write to file '/tmp/mysql_data/ibAGn543' (Errcode: 13)
180222 10:45:28  InnoDB: Error: unable to create temporary file; errno: 13
180222 10:45:28 [ERROR] Plugin 'InnoDB' init function returned error.
180222 10:45:28 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
180222 10:45:28 [ERROR] Unknown/unsupported storage engine: InnoDB
180222 10:45:28 [ERROR] Aborting

180222 10:45:28 [Note] /usr/libexec/mysqld: Shutdown complete

原來是Can't create/write to file，那么就好解決了，看看mysql_data目錄是否存在。

chmod  -R 777 /tmp

賦予寫的權限，啟動mysql:

root@sevck_linux mysql]# service mysqld start
Starting mysqld:                                           [  OK  ]

 

just do it.