mysql数据库安装过程中遇见的问题及解决办法

问题1：

Starting MySQL...Manager of pid-file quit without updating[failue]

解决办法：

修改启动脚本文件：/etc/init.d/mysqld 

conf=/usr/local/mysql/etc/my.cnf

问题2：

[root@localhost scripts]# ./mysql_install_db --user=mysql --datadir=/database/mydata

FATAL ERROR: please install the following Perl modules before executing ./mysql_install_db:

Data::Dumper

解决办法：

[root@localhost scripts]# rpm -ivh /mnt/Packages/perl-Data-Dumper-2.145-3.el7.x86_64.rpm 

warning: /mnt/Packages/perl-Data-Dumper-2.145-3.el7.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID fd431d51: NOKEY

Preparing...                          ################################# [100%]

Updating / installing...

   1:perl-Data-Dumper-2.145-3.el7     ################################# [100%]

问题3：

linux启动mysql报Fatal error:Can't change to run as user 'mysql' Please check that the user exists

解决办法：    

1、创建mysql用户

useradd mysql

2、mysql目录改为mysql读写权限

chown -R mysql:mysql /var/lib/mysql 
chown -R mysql:mysql /usr/local/mysql

问题4

[root@localhost mysql]# ./scripts/mysql_install_db --user=mysql --datadir=/database/mydata

Installing MySQL system tables...2015-10-30 14:18:43 5981 [Note] InnoDB: Using atomics to ref count buffer pool pages

2015-10-30 14:18:43 5981 [Note] InnoDB: The InnoDB memory heap is disabled

2015-10-30 14:18:43 5981 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins

2015-10-30 14:18:43 5981 [Note] InnoDB: Memory barrier is not used

2015-10-30 14:18:43 5981 [Note] InnoDB: Compressed tables use zlib 1.2.3

2015-10-30 14:18:43 5981 [Note] InnoDB: Using CPU crc32 instructions

2015-10-30 14:18:43 5981 [Note] InnoDB: Initializing buffer pool, size = 128.0M

2015-10-30 14:18:43 5981 [Note] InnoDB: Completed initialization of buffer pool

2015-10-30 14:18:43 5981 [Note] InnoDB: Restoring page 0 of tablespace 0

2015-10-30 14:18:43 5981 [Warning] InnoDB: Doublewrite does not have page_no=0 of space: 0

2015-10-30 14:18:43 5981 [ERROR] InnoDB: space header page consists of zero bytes in data file ./ibdata1

2015-10-30 14:18:43 5981 [ERROR] InnoDB: Could not open or create the system tablespace. If you tried to add new data files to the system tablespace, and it failed here, you should now edit innodb_data_file_path in my.cnf back to what it was, and remove the
new ibdata files InnoDB created in this failed attempt. InnoDB only wrote those files full of zeros, but did not yet use them in any way. But be careful: do not remove old data files which contain your precious data!

2015-10-30 14:18:43 5981 [ERROR] Plugin 'InnoDB' init function returned error.

2015-10-30 14:18:43 5981 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.

2015-10-30 14:18:43 5981 [ERROR] Unknown/unsupported storage engine: InnoDB

2015-10-30 14:18:43 5981 [ERROR] Aborting

2015-10-30 14:18:43 5981 [Note] Binlog end

2015-10-30 14:18:43 5981 [Note] ./bin/mysqld: Shutdown complete

解决办法： 

1.删除数据库目录下的文件ib_logfile0和ib_logfile1,我在安装时定义的数据库目录是/database/mydata

rm  -rf /database/mydata/l   

2.再次执行脚本

   [root@localhost mysql]# ./scripts/mysql_install_db --user=mysql --datadir=/database/mydata