题
Irceevered Nagios的停机警报是MySQL在主机上倒下。我登录到主机,并在mySQL error.log文件中找到以下错误。解决此问题的正确步骤是什么?
root@ubuntu:/var/log# tail -f mysql/error.log
101202 11:09:21 [ERROR] Can't open the mysql.plugin table. Please run
mysql_upgrade to create it.
101202 11:09:21 InnoDB: Started; log sequence number 0 44233
101202 11:09:21 [ERROR] /usr/sbin/mysqld: Can't find file: './mysql/host.frm'
(errno: 13)
101202 11:09:21 [ERROR] Fatal error: Can't open and lock privilege tables:
Can't find file: './mysql/host.frm' (errno: 13)
101202 11:09:51 [Note] Plugin 'FEDERATED' is disabled.
/usr/sbin/mysqld: Can't find file: './mysql/plugin.frm'
(errno: 13)
101202 11:09:51 [ERROR] Can't open the mysql.plugin table. Please run
mysql_upgrade to create it.
101202 11:09:52 InnoDB: Started; log sequence number 0 44233
101202 11:09:52 [ERROR] /usr/sbin/mysqld: Can't find file: './mysql/host.frm'
(errno: 13)
101202 11:09:52 [ERROR] Fatal error: Can't open and lock privilege tables:
Can't find file: './mysql/host.frm' (errno: 13)
101202 11:10:22 [Note] Plugin 'FEDERATED' is disabled.
/usr/sbin/mysqld: Can't find file: './mysql/plugin.frm'
(errno: 13)
101202 11:10:22 [ERROR] Can't open the mysql.plugin table. Please run
mysql_upgrade to create it.
101202 11:10:22 InnoDB: Started; log sequence number 0 44233
101202 11:10:22 [ERROR] /usr/sbin/mysqld: Can't find file: './mysql/host.frm'
(errno: 13)
101202 11:10:22 [ERROR] Fatal error: Can't open and lock privilege tables:
Can't find file: './mysql/host.frm' (errno: 13)
解决方案
弄清楚为什么MySQL找不到表。转到MySQL数据目录并查找MySQL子目录(对应于 mysql
包含用户,PROC,特权等诸如)的数据库。也许有人删除了 mysql
数据库。也许有人覆盖您的my.cnf配置文件,其中一个指向错误的数据目录。
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