[MySQL 8] Problems encountered in MySQL 8

Install MySQL8

installation steps

http://dev.mysql.com/get/mysql-apt-config_0.8.16-1_all.deb
dpkg -i mysql-apt-config_0.8.16-1_all.deb

Create users, grant permissions, change and delete user information

MySQL5.7.25

 # 新建、赋予权限
 grant all privileges on *.* to admin@'localhost' identified by 'admins_password' with grant option;
 flush privileges;

# 更改用户 
 ALTER USER 'root'@'localhost' IDENTIFIED BY '你的密码'; 

MySQL 8

# 删除、
drop user admin@localhost;
flush privileges;

# 新建、赋予权限（必须分开进行）
create user admin@localhost identified by 'admins_password';
grant all privileges on *.* to admin@'localhost' with grant option;

# 更改用户
ALTER USER 'root'@'localhost' IDENTIFIED  BY '你的密码';

Laravel connect to MySQL8 configure mysql

SQLSTATE[HY000] [2054] The server requested authentication method unknown to the client
The reason is: the
user’s Authentication type defaults to caching_sha2_password, which leads to a database connection error and throws the following exception:
Illuminate\Database\QueryException : SQLSTATE[HY000] [2054] The server requested authentication method unknown to the client
So the solution is as follows:

Method 1: Modify the MySQL configuration

# /etc/mysql/my.cnf
[mysqld]
default_authentication_plugin = mysql_native_password

systemctl restart mysql

# 重新创建用户（使用  mysql_native_password  模式）
mysql -u root -p
drop user admin@localhost;
flush privileges;
create user admin@localhost identified with mysql_native_password by 'admins_password'；
grant all privileges on *.* to admin@'localhost' with grant option;

Method 2: Modify the laravel configuration (this method is not tested)

Reference: https://github.com/laravel/framework/pull/23948

docker mysql8 installation

Dockerfile：https://github.com/docker-library/mysql/tree/master/8.0

[ERROR] [MY-010187] [Server] Could not open file ‘/var/log/mysql/error.log’ for error logging: Permission denied

chown 999:999 /var/log/mysql/error.log

mysqld: Error on realpath() on ‘/var/lib/mysql-files’ (Error 2 - No such file or directory)

# Dockerfile
RUN mkdir /var/lib/mysql-files