-
安装环境准备
- 操作系统： Oracle Linux Server 6.5
- IP 地址： 192.168.6.176
- 版本信息： MySQL Community Server 5.7.18
-
下载MySQL数据库
-
访问MySQL网站
MySQL官网下载 -
根据操作系统类型和版本下载相应的安装包
注：此处下载的是RPM格式的安装包，通过RPM方式进行安装。
需要下载的安装包：
- mysql-community-server-5.7.18-1.el6.x86_64.rpm
- mysql-community-common-5.7.18-1.el6.x86_64.rpm
- mysql-community-client-5.7.18-1.el6.x86_64.rpm
- mysql-community-libs-5.7.18-1.el6.x86_64.rpm
下载安装包
-
-
安装MySQL数据库
在Linux操作系统下执行命令进行安装。
[root@DB-Server-Node1 ~]# rpm -ivh mysql-community-server-5.7.18-1.el6.x86_64.rpm mysql-community-common-5.7.18-1.el6.x86_64.rpm mysql-community-client-5.7.18-1.el6.x86_64.rpm mysql-community-libs-5.7.18-1.el6.x86_64.rpm warning: mysql-community-client-5.7.18-1.el6.x86_64.rpm: Header V3 DSA/SHA1 Signature, key ID 5072e1f5: NOKEY Preparing... ########################################### [100%] 1:mysql-community-common ########################################### [ 25%] 2:mysql-community-libs ########################################### [ 50%] 3:mysql-community-client ########################################### [ 75%] 4:mysql-community-server ########################################### [100%] -
配置MySQL数据库
-
修改/etc/my.cnf配置文件， 指定数据存放位置
注： 修改MySQL数据库的默认数据存储路径， 需要关闭SELinux， 否则会出现服务启动不了，并出现
Can't create directory的错误信息。[root@DB-Server-Node1 ~]# vi /etc/my.cnf [mysqld] datadir=/data/mysql socket=/var/lib/mysql/mysql.sock # Disabling symbolic-links is recommended to prevent assorted security risks symbolic-links=0 log-error=/var/log/mysqld.log pid-file=/var/run/mysqld/mysqld.pid -
创建数据目录，并修改目录所有者
[root@DB-Server-Node1 ~]# mkdir -p /data/mysql [root@DB-Server-Node1 data]# cd /data [root@DB-Server-Node1 data]# chown -R mysql.mysql mysql [root@DB-Server-Node1 data]# ll total 20 drwx------. 2 root root 16384 Jul 14 10:46 lost+found drwxr-xr-x. 2 mysql mysql 4096 Jul 14 14:43 mysql -
启动MySQL服务
[root@DB-Server-Node1 mysql]# service mysqld start Initializing MySQL database: [ OK ] Installing validate password plugin: [ OK ] Starting mysqld: [ OK ]注意： 在初次启动mysql服务时， 请先确保是否已经关闭selinux， 否则在服务启动时会出现
Can’t create test file xxx-lower-test的错误信息， 可以通过临时关闭selinux命令setenforce 0或永久关闭selinux（修改/etc/sysconfig/selinux配置文件）来禁用selinux。
-
-
修改数据库默认密码
(1). 通过MySQL生成的临时密码来修改
MySQL 5.7在启动时会生成一个初始化密码，而在之前的版本首次登陆不需要登录。可以通过生成的默认密码登录数据库，然后再修改root的密码；
方法 1：
[root@DB-Server-Node1 mysql]# cat /root/.mysql_secret # Password set for user 'root@localhost' at 2015-04-22 22:13:23 ?G5W&tz1z.cN注： 在Linux操作系统下有可能没有.mysql_secret文件， 可以采用以下的方法来查询MySQL的临时密码。
方法2：
[root@DB-Server-Node1 mysql]# grep 'temporary password' /var/log/mysqld.log 2015-04-23T03:04:55.113219Z 1 [Note] A temporary password is generated for root@localhost: kqiffRrpa2,:(2). 通过MySQL安全模式来修改密码
另外还可以通过以下的步骤来修改root用户的密码。
- 先停止MySQL服务
```
[root@DB-Server-Node1 data]# service mysqld stop
Stopping mysqld: [ OK ]
```
- 使用安全模式进入MySQL
```
[root@DB-Server-Node1 data]# mysqld_safe --skip-grant-tables
2017-06-14T07:06:38.506327Z mysqld_safe Logging to '/var/log/mysqld.log'.
2017-06-14T07:06:38.548109Z mysqld_safe Starting mysqld daemon with databases from /data/mysql
```
此处，需要新打开一个SSH连接
```
[root@DB-Server-Node1 ~]# mysql
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.7.18 MySQL Community Server (GPL)
Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql>use mysql
Database Changed
mysql>update user set authentication_string=password("123456") where user='root' and host='localhost';
Query OK, 1 row affected, 1 warning (0.00 sec)
Rows matched: 1 Changed: 1 Warnings: 1
mysql>flush privileges;
Query OK, 0 rows affected (0.00 sec)
mysql>exit
```
修改完后， 退出安全模式， 并重启服务
-
测试MySQL数据库访问
[root@DB-Server-Node1 mysql]# mysql -u root -p Enter password: Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 4 Server version: 5.7.18 Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql>登录成功， 修改用户密码成功。
注： MySQL 5.7版本在用户首次登录时提示用户修改密码， 需要通过
set PASSWORD=PASSWORD("新密码");语句来设置新密码， 如果不修改则无法对数据库进行操作。mysql> GRANT ALL PRIVILEGES ON *.* TO root@'%' IDENTIFIED BY 'Sczq@db123' WITH GRANT OPTION; ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement. mysql> set PASSWORD=PASSWORD("123456"); Query OK, 0 rows affected, 1 warning (0.00 sec) mysql> grant all privileges on *.* to root@'%' identified by '123456' with grant option; Query OK, 0 rows affected, 1 warning (0.00 sec)
