CentOS启动MySQL服务失败

 :: mysqld_safe Starting mysqld daemon with databases from /data/mysql
 :: [Warning] Can't create test file /data/mysql/localhost.lower-test
 :: [Warning] Can't create test file /data/mysql/localhost.lower-test
^G/usr/libexec/mysqld: Can't find file: './mysql/plugin.frm' (errno: 13)
 :: [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.
 ::  InnoDB: Initializing buffer pool, size = 8.0M
 ::  InnoDB: Completed initialization of buffer pool
 ::  InnoDB: Operating system error number  in a file operation.
InnoDB: The error means mysqld does not have the access rights to
InnoDB: the directory.
InnoDB: File name ./ibdata1
InnoDB: File operation call: 'open'.
InnoDB: Cannot continue operation.
 :: mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended

貌似是SELinux的问题，做了以下两步可以了

1. 修改配置文件修改配置文件/etc/selinux/config（未验证不修改是否可以）

　　修改SELINUX=enforcing为SELINUX=permissive

2. chcon -R -t mysqld_db_t /data/mysql