mysql-8.0.16-linux-glibc2.12-x86_64

MySQL8数据库安装部署

1. 准备
   卸载之前安装过的版本
   确保之前安装过的版本完全卸载，包括老版本使用的数据文件。检查“/etc/my.cnf”，“/etc/mysql”，删除。
   依赖库 - libaio
   影响到数据目录初始化、服务启动。
2. 安装
   启动MySQL的最简单方法：

   groupadd mysql
   useradd -r -g mysql -s /bin/false mysql
   # jeecg项目需要忽略掉数据库大小写
   bin/mysqld --initialize --user=mysql --lower-case-table-names=1
   bin/mysqld_safe --user=mysql &
   # Next command is optional
   cp support-files/mysql.server /etc/init.d/mysql.server
   # reset password
   mysql -uroot -p
   alter user root@localhost identified by '';

   为启动脚本添加配置选项/etc/my.cnf：

   [mysqld]
   datadir=/usr/local/mysql/var
   socket=/var/tmp/mysql.sock
   port=3306
   user=mysql
   
   [mysql.server]
   basedir=/usr/local/mysql

3. 创建对象

   创建数据库、创建用户并授权

   create database if not exists db_name character set = utf8;
   create user user_name@'host_name' identified by 'user_pass';
   grant all privileges on db_name.* to 'user_name'@host_name;
   show grants for 'user_name'@host_name;

   解决mysql2058

   alter user 'user_name'@'host_name' identified with mysql_native_password by 'user_pass';

4. 多实例运行
   选项：

   # Must have different values for each server instance.
   port=port_num
   socket={file_name|pipe_name}
   bind_address=0.0.0.0
   datadir=dir_name
   pid-file=file_name
   
   # log file options
   general_log_file=file_name
   log-bin[=file_name]
   slow_query_log_file=file_name
   log-error[=file_name]
   
   # To achieve better performance.
   tmpdir=dir_name

MySQL5