1、資料初始化-主機名解析錯誤

系統-Red Hat Enterprise Linux Server release 6.6

軟體-原始碼安裝mysql-5.6.27.tar.gz

環境-Linux rhel6.myexample.com 2.6.32-504.el6.x86_64 #1 SMP Tue Sep 16 01:56:35 EDT 2014 x86_64 x86_64 x86_64 GNU/Linux

報錯：WARNING

[[email protected] mysql]# scripts/mysql_install_db --user=mysql
WARNING: The host 'rhel6.myexample.com' could not be looked up with ./bin/resolveip.
This probably means that your libc libraries are not 100 % compatible
with this binary MySQL version. The MySQL daemon, mysqld, should work
normally with the exception that host name resolving will not work.
This means that you should use IP addresses instead of hostnames
when specifying MySQL privileges !

原因：主機名解析錯誤。

解決：hosts檔案中新增如下內容，ok！

[[email protected] mysql]# vi /etc/hosts

192.168.56.20 rhel6.myexample.com

總結：

因為lib庫不是很相容當前MySQL版本。在主機名解析不起作用的情況下，會引起MySQL守護程序、mysqld工作異常，因此在MySQL中授權時需要使用IP地址，而不能使用主機名。

（不解決該問題，依然可以正確執行scripts/mysql_install_db資料庫初始化指令碼。）

2、資料初始化-時間戳問題

系統-Red Hat Enterprise Linux Server release 6.6

軟體-原始碼安裝mysql-5.6.27.tar.gz

環境-Linux rhel6.myexample.com 2.6.32-504.el6.x86_64 #1 SMP Tue Sep 16 01:56:35 EDT 2014 x86_64 x86_64 x86_64 GNU/Linux

報錯：Warning

[[email protected] mysql]# scripts/mysql_install_db --user=mysql
Installing MySQL system tables...2015-11-04 07:46:37 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2015-11-04 07:46:37 0 [Note] ./bin/mysqld (mysqld 5.6.27) starting as process 2867 ...

原因：機器的系統時間與TIMESTAMP時間戳不匹配。

解決：執行mysql_install_db資料初始化指令碼時新增explicit_defaults_for_timestamp選項。

[[email protected] mysql]# scripts/mysql_install_db --user=mysql --explicit_defaults_for_timestamp

3、資料初始化-重複安裝引起多個配置檔案，預設配置檔案

系統-Red Hat Enterprise Linux Server release 6.6

軟體-原始碼安裝mysql-5.6.27.tar.gz

環境-Linux rhel6.myexample.com 2.6.32-504.el6.x86_64 #1 SMP Tue Sep 16 01:56:35 EDT 2014 x86_64 x86_64 x86_64 GNU/Linux

報錯：Warning

WARNING: Found existing config file ./my.cnf on the system.
Because this file might be in use, it was not replaced,
but was used in bootstrap (unless you used --defaults-file)
and when you later start the server.
The new default config file was created as ./my-new.cnf,
please compare it with your file and take the changes you need.


WARNING: Default config file /etc/my.cnf exists on the system
This file will be read by default by the MySQL server
If you do not want to use this, either remove it, or use the
--defaults-file argument to mysqld_safe when starting the server

原因：

Warning1是因為重複安裝，導致在安裝目錄下已經存在my.cnf檔案。

Warning2是指預設的my.cnf配置檔案在/etc/目錄下。

啟動Mysql server時，可指定--default-file=/path/my.cnf引數來啟動mysql服務。

=============================================================================================================================

正確執行的顯示：

[[email protected] mysql]# scripts/mysql_install_db --user=mysql --explicit_defaults_for_timestamp
Installing MySQL system tables...2015-11-04 08:48:03 0 [Note] ./bin/mysqld (mysqld 5.6.27) starting as process 3147 ...
2015-11-04 08:48:03 3147 [Note] InnoDB: Using atomics to ref count buffer pool pages
2015-11-04 08:48:03 3147 [Note] InnoDB: The InnoDB memory heap is disabled
2015-11-04 08:48:03 3147 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2015-11-04 08:48:03 3147 [Note] InnoDB: Memory barrier is not used
2015-11-04 08:48:03 3147 [Note] InnoDB: Compressed tables use zlib 1.2.3
2015-11-04 08:48:03 3147 [Note] InnoDB: Using CPU crc32 instructions
2015-11-04 08:48:03 3147 [Note] InnoDB: Initializing buffer pool, size = 128.0M
2015-11-04 08:48:03 3147 [Note] InnoDB: Completed initialization of buffer pool
2015-11-04 08:48:03 3147 [Note] InnoDB: Highest supported file format is Barracuda.
2015-11-04 08:48:03 3147 [Note] InnoDB: 128 rollback segment(s) are active.
2015-11-04 08:48:03 3147 [Note] InnoDB: Waiting for purge to start
2015-11-04 08:48:03 3147 [Note] InnoDB: 5.6.27 started; log sequence number 1626007
2015-11-04 08:48:11 3147 [Note] Binlog end
2015-11-04 08:48:11 3147 [Note] InnoDB: FTS optimize thread exiting.
2015-11-04 08:48:11 3147 [Note] InnoDB: Starting shutdown...
2015-11-04 08:48:12 3147 [Note] InnoDB: Shutdown completed; log sequence number 1626017
OK


Filling help tables...2015-11-04 08:48:12 0 [Note] ./bin/mysqld (mysqld 5.6.27) starting as process 3171 ...
2015-11-04 08:48:12 3171 [Note] InnoDB: Using atomics to ref count buffer pool pages
2015-11-04 08:48:12 3171 [Note] InnoDB: The InnoDB memory heap is disabled
2015-11-04 08:48:12 3171 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2015-11-04 08:48:12 3171 [Note] InnoDB: Memory barrier is not used
2015-11-04 08:48:12 3171 [Note] InnoDB: Compressed tables use zlib 1.2.3
2015-11-04 08:48:12 3171 [Note] InnoDB: Using CPU crc32 instructions
2015-11-04 08:48:12 3171 [Note] InnoDB: Initializing buffer pool, size = 128.0M
2015-11-04 08:48:12 3171 [Note] InnoDB: Completed initialization of buffer pool
2015-11-04 08:48:12 3171 [Note] InnoDB: Highest supported file format is Barracuda.
2015-11-04 08:48:12 3171 [Note] InnoDB: 128 rollback segment(s) are active.
2015-11-04 08:48:12 3171 [Note] InnoDB: Waiting for purge to start
2015-11-04 08:48:12 3171 [Note] InnoDB: 5.6.27 started; log sequence number 1626017
2015-11-04 08:48:12 3171 [Note] Binlog end
2015-11-04 08:48:12 3171 [Note] InnoDB: FTS optimize thread exiting.
2015-11-04 08:48:12 3171 [Note] InnoDB: Starting shutdown...
2015-11-04 08:48:14 3171 [Note] InnoDB: Shutdown completed; log sequence number 1626027
OK


To start mysqld at boot time you have to copy
support-files/mysql.server to the right place for your system


PLEASE REMEMBER TO SET A PASSWORD FOR THE MySQL root USER !
To do so, start the server, then issue the following commands:


  ./bin/mysqladmin -u root password 'new-password'
  ./bin/mysqladmin -u root -h rhel6.myexample.com password 'new-password'


Alternatively you can run:


  ./bin/mysql_secure_installation


which will also give you the option of removing the test
databases and anonymous user created by default.  This is
strongly recommended for production servers.


See the manual for more instructions.


You can start the MySQL daemon with:


  cd . ; ./bin/mysqld_safe &


You can test the MySQL daemon with mysql-test-run.pl


  cd mysql-test ; perl mysql-test-run.pl


Please report any problems at http://bugs.mysql.com/


The latest information about MySQL is available on the web at


  http://www.mysql.com


Support MySQL by buying support/licenses at http://shop.mysql.com


New default config file was created as ./my.cnf and
will be used by default by the server when you start it.
You may edit this file to change server settings


WARNING: Default config file /etc/my.cnf exists on the system
This file will be read by default by the MySQL server
If you do not want to use this, either remove it, or use the
--defaults-file argument to mysqld_safe when starting the server


[[email protected] mysql]#