CentOS7下安装MySQL的安装与配置(yum) (转)

原文链接:http://www.centoscn.com/mysql/2016/0626/7537.html

1、配置YUM源

MySQL官网中下载YUM源rpm安装包:http://dev.mysql.com/downloads/repo/yum/

# 下载mysql源安装包
shell> wget http://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm
# 安装mysql源
shell> yum localinstall mysql57-community-release-el7-8.noarch.rpm

检查mysql源是否安装成功

shell> yum repolist enabled | grep "mysql.*-community.*"
[root@VM_92_239_centos ~]# yum repolist enabled | grep "mysql.*-community.*"
mysql-connectors-community/x86_64 MySQL Connectors Community 3
mysql-tools-community/x86_64 MySQL Tools Community 4
mysql57-community/x86_64 MySQL 5.7 Community Server 18

看到上面信息所示表示安装成功!

2、安装MySQL

shell> yum install mysql-community-server

3、启动MySQL服务

shell> systemctl start mysqld

查看MySQL的启动状态:

shell> systemctl status mysqld
● mysqld.service - MySQL Server
Loaded: loaded (/usr/lib/systemd/system/mysqld.service; disabled; vendor preset: disabled)
Active: active (running) since 五 2016-06-24 04:37:37 CST; 35min ago
Main PID: 2888 (mysqld)
CGroup: /system.slice/mysqld.service
└─2888 /usr/sbin/mysqld --daemonize --pid-file=/var/run/mysqld/mysqld.pid 6月 24 04:37:36 localhost.localdomain systemd[1]: Starting MySQL Server...
6月 24 04:37:37 localhost.localdomain systemd[1]: Started MySQL Server.

4、开机启动

shell> systemctl enable mysqld
shell> systemctl daemon-reload

5、修改root默认密码

mysql安装完成之后,在/var/log/mysqld.log文件中给root生成了一个默认密码。通过下面的方式找到root默认密码,然后登录mysql进行修改:

获取默认密码:

  shell> grep 'temporary password' /var/log/mysqld.log
shell> mysql -uroot -p
mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'MyNewPass4!';

或者

mysql> set password for 'root'@'localhost'=password('MyNewPass4!');

注意:mysql5.7默认安装了密码安全检查插件(validate_password),默认密码检查策略要求密码必须包含:大小写字母、数字和特殊符号,并且长度不能少于8位。否则会提示ERROR 1819 (HY000): Your password does not satisfy the current policy requirements错误,如下图所示:

通过msyql环境变量可以查看密码策略的相关信息:(密码策略这一块我没有做)

mysql> show variables like '%password%';

重新启动mysql服务使配置生效:

systemctl restart mysqld

6、添加远程登录用户

默认只允许root帐户在本地登录,如果要在其它机器上连接mysql,必须修改root允许远程连接,或者添加一个允许远程连接的帐户,为了安全起见,我添加一个新的帐户:

GRANT ALL PRIVILEGES ON *.* TO 'admin'@'%' IDENTIFIED BY 'Zengjiqiang123!' WITH GRANT OPTION;

7、配置默认编码为utf8

修改/etc/my.cnf配置文件,在[mysqld]下添加编码配置,如下所示:

[mysqld]
character_set_server=utf8
init_connect='SET NAMES utf8'

重新启动mysql服务,完成!

systemctl restart mysqld
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