centos7安装MySQL

centos7 aarch64安装MySQL5.7.27

mysql-5.7.27-aarch64.tar.gz

1. 安装依赖
   sudo yum install -y libatomic

2. 解压mysql

   tar xvf mysql-5.7.27-aarch64.tar.gz -C /user/local
   mv /usr/local/mysql-5.7.27-aarch64 /usr/local/mysql
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3. 替换老版本gcc

   cp /usr/local/mysql/extra/libstdc++.so.6.0.24 /usr/lib64
   cd /usr/lib64
   rm libstdc++.so.6
   ln -s libstdc++.so.6.0.24 libstdc++.so.6
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4. 配置

   • Mysql配置

   mkdir -p /usr/local/mysql/logs
   chown -R mysql:mysql /usr/local/mysql 
   ln -sf /usr/local/mysql/my.cnf /etc/my.cnf
   cp -rf /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld
   chmod +x /etc/init.d/mysqld
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   • 环境变量

   vim /etc/profile.d/my_env.sh
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   # MYSQL_HOME
   export MYSQL_HOME=/usr/local/mysql
   export PATH=$PATH:$MYSQL_HOME/bin
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   source /etc/profile
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5. 启动MySQL

   systemctl enable mysqld
   sudo mysqld --initialize --user=mysql --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data
   systemctl start mysqld
   systemctl status mysqld
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error

ERROR 1045 (28000): Access denied for user ‘root’@‘localhost’ (using password: NO)

解决：
1. 设置无密码登陆：

`sudo vim /etc/my.cnf `
添加：`skip-grant-tables`
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保存后重启服务:    `systemctl restart mysql`
1. 登陆mysql后，先把密码设置为空

    `mysql -uroot -p` 
    ```
    use mysql;
    update user set authentication_string='' where user='root';
    quit;
    ```
    
2. 重新使用密码登陆

    `sudo vim /etc/my.cnf `
    注释或删除：`#skip-grant-tables`
    `systemctl restart mysql`

    登陆root账号，由于设置了密码，可以直接敲回车进入mysql
    ```
    ALTER USER 'root'@'localhost' IDENTIFIED BY '您的密码';
    quit;
    ```
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yum安装mysql8

1. 下载yum repository
   页面：https://dev.mysql.com/downloads/repo/yum/
   

或者
wget https://dev.mysql.com/get/mysql84-community-release-el7-1.noarch.rpm

 `# wget http://dev.mysql.com/get/mysql57-community-release-el6-8.noarch.rpm #安装会报错,8以下版本没有aarch64版本的`
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2. 安装repo
   sudo yum -y localinstall mysql84-community-release-el7-1.noarch.rpm
   

3. 安装工具
   sudo yum -y install yum-utils
   

4. 安装mysql
   sudo yum -y install mysql-community-server mysql

运行

初始化

1. 运行
   systemctl start mysqld

2. 查看初始密码
   sudo cat /var/log/mysqld.log
   

3. 登陆root账户
   mysql -uroot -p
   

4. 修改root密码
   必须要先修改初始密码，才能进行后续的操作，mysql的密码要求比较高，目前知道 大写字母+小写字母+特殊字符可以过

   USE mysql;
   ALTER USER 'root'@'localhost' IDENTIFIED BY 'MyNewPass4!';
   FLUSH PRIVILEGES;
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   error

   DBMS: MySQL (版本 8.4.0) 区分大小写: 普通形式=mixed，分隔形式=exact NotBefore: Wed May 29 13:09:17 UTC 2024.

   解决：
   在连接地址后面加上：?useSSL=false&serverTimezone=UTC

   

   DBMS: MySQL (无版本) 区分大小写: 普通形式=mixed，分隔形式=exact [08001] Public Key Retrieval is not allowed.

   解决：
   在连接地址后面加上：allowPublicKeyRetrieval=true

   

   备用方案：

   ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'Hlgj832411.';
   ## 刷新权限
   FLUSH PRIVILEGES;
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   ERROR 1193 (HY000): Unknown system variable ‘validate_password_policy’

   解决： mysql8改变量名称了,使用validate_password.policy去设置
   set global validate_password.policy=0;

    *查看变量名称*
    `SHOW VARIABLES LIKE 'validate_password%';`
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删除mysql

1. 停止服务
   sudo systemctl stop mysqld
2. 卸载mysql
   sudo yum remove mysql mysql-server
3. 清理残留文件

   sudo rm -rf /var/lib/mysql/
   sudo rm /etc/my.cnf
   sudo find / -name 'mysql*' -exec rm -rf {} \;
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