Linux 通过 Docker 安装 MySQL8

版本声明

名称	版本
系统	CentOS 8
MySQL	8.0.27

卸载MySQL

如果已安装了MySQL需要先卸载

rpm -qa | grep -i mysql

# 逐一卸载已安装的包
yum remove -y mysql-commutity-conmmon-8.0.27-1.e18.x86_64
# 删除MySQL文件
find / -name mysql -type f -print -exec rm -rf {} \;
...

安装MySQL8

1. 安装yum源

访问 MySQL官方下载地址，获取yum源地址

# 下载yum源，wget后面的地址就是上图获取的yum源地址
wget https://repo.mysql.com//mysql80-community-release-el8-1.noarch.rpm
# 安装yum源
yum -y localinstall mysql80-community-release-el8-1.noarch.rpm

2. 禁用CentOS8自带的MySQL模块

yum module disable mysql

3. 安装MySQL服务

yum install -y mysql-community-server

4. 启动MySQL

systemctl start mysqld

5. 查看MySQL状态

systemctl status mysqld

6. 设置MySQL开机自启

systemctl enable mysqld
systemctl daemon-reload

设置密码

1. 获取临时密码

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

2. 登录 MySQL

mysql -uroot -pqvysykoyf4=R

3. 修改 MySQL 新密码 123456

ALTER USER 'root' @'localhost' IDENTIFIED BY '123456';

4. 密码简单不满足密码策略

可以提高密码复杂度，也可以降低密码策略设置简单好记的密码。

ERROR 1819 (HY000): Your password does not satisfy the current policy requirements

查看当前密码策略

SHOW VARIABLES LIKE 'validate_password%';

降低密码策略

set global validate_password.length=4;
set global validate_password.special_char_count=0;
set global validate_password.policy =LOW;

开放远程连接

use mysql;
update user set host = '%' where user ='root';
alter user 'root'@'%' identified by '123456' password expire never;
alter user 'root'@'%' identified with mysql_native_password by '123456';
flush privileges;

连接OK