CentOS7下安装MySQL5.7安装与配置(YUM)

时间:2022-03-12 21:08:22

首先附上官方手册:https://dev.mysql.com/doc/mysql-yum-repo-quick-guide/en/#repo-qg-yum-fresh-install

# 下载mysql源安装包

wget http://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm
# 安装mysql源

yum -y localinstall mysql57-community-release-el7-8.noarch.rpm

# 检查mysql源是否安装成功

yum -y repolist enabled | grep "mysql.*-community.*"

CentOS7下安装MySQL5.7安装与配置(YUM)

看到上图所示表示安装成功

安装MySQL

yum -y install mysql-community-server

启动MySQL服务

systemctl start mysqld

检查MySQL状态

systemctl status mysqld

开机启动

systemctl enable mysqld
systemctl daemon-reload

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:
grep'temporary password' /var/log/mysqld.log

CentOS7下安装MySQL5.7安装与配置(YUM)

mysql-uroot-p

密码输入上面的默认密码

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:

CentOS7下安装MySQL5.7安装与配置(YUM)

通过msyql环境变量可以查看密码策略的相关信息:

mysql> show variables like '%password%';
CentOS7下安装MySQL5.7安装与配置(YUM)

MySQL官网密码策略详细说明:http://dev.mysql.com/doc/refman/5.7/en/validate-password-options-variables.html#sysvar_validate_password_policy

修改密码策略

在/etc/my.cnf文件添加validate_password_policy配置,指定密码策略

# 选择0(LOW),1(MEDIUM),2(STRONG)其中一种,选择2需要提供密码字典文件
validate_password_policy=0

如果不需要密码策略,添加my.cnf文件中添加如下配置禁用即可:

validate_password = off

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:

mysql> GRANT ALL PRIVILEGES ON *.* TO 'yangxin'@'%' IDENTIFIED BY 'Yangxin0917!' 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,查看数据库默认编码如下所示:

CentOS7下安装MySQL5.7安装与配置(YUM)

默认配置文件路径: 

配置文件:/etc/my.cnf 

日志文件:/var/log//var/log/mysqld.log 

服务启动脚本:/usr/lib/systemd/system/mysqld.service 

socket文件:/var/run/mysqld/mysqld.pid