Plugin 'InnoDB' registration as a STORAGE ENGINE failed，从详细错误日志里面发现创建log file创建失败。详细日志如下：

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InnoDB: If this error appears when you are creating an InnoDB database,

InnoDB: the problem may be that during an earlier attempt you managed

InnoDB: to create the InnoDB data files, but log file creation failed.

InnoDB: If that is the case, please refer to

InnoDB: http://dev.mysql.com/doc/refman/5.1/en/error-creating-innodb.html

131017 0:45:52 [ERROR] Plugin 'InnoDB' init function returned error.

131017 0:45:52 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.

其实之前这台服务器有加载过innodb，后来卸掉了，但是logfile文件没有删除，导致从新加载的时候出现这个问题。解决方法很简单
进入mysql数据路径
/var/lib/mysql

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rm -rf ib_logfile*

mysql服务重启