简介

博主最近在研究mysql的读写分离和主从复制，一台master和两台slave,三台机器在同一个局域网中，首先就就要在centos6.5中安装mysql5.7。好了，废话不多说，接下来进入正题。

一、解压缩到/usr/local/下面，mysql的主目录命名为mysql

[root@localhost local]# cd /usr/local/soft/[root@localhost soft]# tar zvxf mysql-5.7.10-linux-glibc2.5-i686.tar.gz -C /usr/local[root@localhost soft]# cd ..[root@localhost local]# mv mysql-5.7.10-linux-glibc2.5-i686/ mysql

二、在mysql下面创建data数据库文件目录

[root@localhost local]# mkdir mysql/data

三、创建mysql的用户组和用户，并对mysql目录设置用户组和用户

[root@localhost local]# groupadd mysql[root@localhost local]# useradd mysql -g mysql[root@localhost local]# cd mysql[root@localhost mysql]# pwd/usr/local/mysql[root@localhost mysql]# chown -R mysql . #给名称为mysql的用户授权[root@localhost mysql]# chgrp -R mysql .

四、初始化mysql并启动mysql服务

[root@localhost mysql]# cd /usr/local/mysql/bin[root@localhost bin]# yum install libaio[root@localhost bin]# ./mysql_install_db --user=mysql --basedir=/usr/local/mysql/ --datadir=/usr/local/mysql/data2016-01-09 12:00:28 [WARNING] mysql_install_db is deprecated. Please consider switching to mysqld --initialize2016-01-09 12:00:33 [WARNING] The bootstrap log isn't empty:2016-01-09 12:00:33 [WARNING] 2016-01-09T04:00:29.262989Z 0 [Warning] --bootstrap is deprecated. Please consider using --initialize instead2016-01-09T04:00:29.264643Z 0 [Warning] Changed limits: max_open_files: 1024 (requested 5000)2016-01-09T04:00:29.264653Z 0 [Warning] Changed limits: table_open_cache: 431 (requested 2000)[root@localhost bin]# cd /usr/local/mysql/support-files[root@localhost support-files]# ./mysql.server startStarting MySQL. SUCCESS!

五、登录mysql，此版本最新版不许空密码登录，实际上有个初始化密码保存在/root/.mysql_secret这个文件里面，用这个密码第一次登录后，再修改密码。因此先cat查看下初始化密码（随机的，每次安装看到的密码都不一样）：

[root@localhost ~]# cat /root/.mysql_secret# Password set for user 'root@localhost' at 2016-11-10 20:19:352t:tRP01UZ16#利用初始化密码:2t:tRP01UZ16 开始登录mysql：[root@localhost ~]# cd /usr/local/mysql/bin[root@localhost bin]# ./mysql -uroot -p:2t:tRP01UZ16mysql: [Warning] Using a password on the command line interface can be insecure.Welcome to the MySQL monitor.  Commands end with ; or \g.Your MySQL connection id is 5Server version: 5.7.10Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respectiveowners.Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.mysql>

显示登录成功，可以执行mysql命令操作了！

六、改mysql的root密码，新密码在此为'admin'

mysql> set password=password('admin');Query OK, 0 rows affected, 1 warning (0.00 sec)

七、设定远程登录mysql。在Linux下为了安全，默认是不允许mysql本机以外的机器访问mysql数据库服务，因此需要重新授权root。方便远程访问。

mysql> use mysql;Reading table information for completion of table and column namesYou can turn off this feature to get a quicker startup with -ADatabase changedmysql> select Host,User from user;+-----------+-----------+| Host      | User      |+-----------+-----------+| %         | root      || localhost | mysql.sys || localhost | root      |+-----------+-----------+3 rows in set (0.00 sec)mysql> GRANT ALL PRIVILEGES ON *.* TO root@'%' identified by 'admin';Query OK, 0 rows affected, 1 warning (0.00 sec)mysql> flush privileges;Query OK, 0 rows affected (0.00 sec)

授权语句最后的‘admin’是mysql数据库root用户的新密码。

八、非必要的步骤，如果远程连不上，估计是防火墙的问题，关闭试试：

[root@localhost mysql]# service iptables stopsetenforce 0iptables：将链设置为政策 ACCEPT：filter        [确定]iptables：清除防火墙规则：                                 [确定]iptables：正在卸载模块：                                   [确定][root@localhost mysql]# setenforce 0setenforce: SELinux is disabled

九、将mysql设置为开机自启动，并添加软连接

[root@localhost mysql]# cd /usr/local/mysql/support-files/[root@localhost support-files]# cp mysql.server /etc/init.d[root@localhost support-files]# cd /etc/init.d[root@localhost init.d]# mv mysql.server mysqld[root@localhost init.d]# cd /usr/bin[root@jacky bin]# ln -s /usr/local/mysql/bin/mysql mysql

注意问题：存放mysql解压文件路径/usr/local/mysql和存放mysql数据路径/usrl/local/mysql/data ，博主刚开始以为这个路径是自定义的，就命名为/usr/local/mysql5.7和/usrl/local/mysql5.7/data结果没安装成功了，但是启动不了，最后只能卸载了重新安装