MySQL服务器间迁移数据目录问题

1. 拷贝数据目录 /var/lib/mysql到新服务器

1)scp拷贝数据目录，文件属性会改变，修改: /var/lib # chown mysql:mysql -R mysql

2)压缩后scp拷贝，会保留原文件属性权限

3)rsync拷贝数据目录，会保留原文件属性权限

2. 在新服务器使用拷贝的数据目录启动mysql

错误日志:

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160315 14:46:39 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql

160315 14:46:39 [Note] Plugin 'FEDERATED' is disabled.

/usr/sbin/mysqld: Can't find file: './mysql/plugin.frm' (errno: 13)

160315 14:46:39 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.

160315 14:46:39 InnoDB: The InnoDB memory heap is disabled

160315 14:46:39 InnoDB: Mutexes and rw_locks use GCC atomic builtins

160315 14:46:39 InnoDB: Compressed tables use zlib 1.2.3

160315 14:46:39 InnoDB: Using Linux native AIO

160315 14:46:39 InnoDB: Initializing buffer pool, size = 128.0M

160315 14:46:39 InnoDB: Completed initialization of buffer pool

160315 14:46:39 InnoDB: Operating system error number 13 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.

160315 14:46:39 mysqld_safe mysqld from pid file /var/lib/mysql/srv200.pid ended

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1) 尝试删除数据目录下日志文件：

mysql # rm ib_logfile* -f

2) 确认数据目录chown,chmod权限没问题；

3) selinux问题检查

# vim /etc/selinux/config # 尝试修改

SELINUX=enforcing to SELINUX=permissive

/var/lib # ls -Z mysql_bak_0 # 原数据目录

drwx--x--x. mysql mysql unconfined_u:object_r:mysqld_db_t:s0 mysql

drwx------. mysql mysql unconfined_u:object_r:mysqld_db_t:s0 performance_schema

-rw-r--r--. root root unconfined_u:object_r:mysqld_db_t:s0 RPM_UPGRADE_HISTORY

-rw-r--r--. mysql mysql unconfined_u:object_r:mysqld_db_t:s0 RPM_UPGRADE_MARKER-LAST

drwxr-xr-x. mysql mysql unconfined_u:object_r:mysqld_db_t:s0 test

/var/lib # ls -Z mysql # 拷贝的数据目录

-rw-rw----. mysql mysql unconfined_u:object_r:var_lib_t:s0 ibdata1

drwx--x--x. mysql mysql unconfined_u:object_r:var_lib_t:s0 mysql

drwx------. mysql mysql unconfined_u:object_r:var_lib_t:s0 performance_schema

-rw-r--r--. root root unconfined_u:object_r:var_lib_t:s0 RPM_UPGRADE_HISTORY

-rw-r--r--. mysql mysql unconfined_u:object_r:var_lib_t:s0 RPM_UPGRADE_MARKER-LAST

drwxr-xr-x. mysql mysql unconfined_u:object_r:var_lib_t:s0 test

/var/lib # chcon -R -t mysqld_db_t mysql # 修改

再次启动mysql，成功。