密码模式
PDO::__construct(): The server requested authentication method unknown to the client [caching_sha2_password]
mysql8 之后，默认的密码模式改为 caching_sha2_password，新的模式需要新的驱动，至少现在 pdo / navicat 还没给出，所以我们还是得切换成老的 mysql_native_password 模式。
`mysql_native_password`：7.0 以下 `caching_sha2_password`：8.0 以上
1、my.cnf 配置默认的密码模式
[mysqld] default_authentication_plugin=mysql_native_password
2、更新账号的密码模式
# 创建新的账号 create user 'root'@'%' identified with mysql_native_password by '123456'; # 已存在的账号 alter user 'root'@'%' identified with mysql_native_password by '123456';
3、如果你需要授权
# 授权也不能兼并创建账号了，只能授权 grant all privileges on *.* to 'root'@'%' with grant option; flush privileges;
密码复杂度策略
ERROR 1819 (HY000): Your password does not satisfy the current policy requirements
密码复杂度验证策略导致的，关闭后设定即可
set global validate_password.policy=0; set global validate_password.length=6;
默认编码
PDO::__construct(): Server sent charset (255) unknown to the client. Please, report to the developers
设定 mysql 服务的默认编码
# Default Homebrew MySQL server config [client] default_character_set=utf8mb4 [mysql] default_character_set=utf8mb4 [mysqld] default_authentication_plugin=mysql_native_password character_set_server=utf8mb4 collation_server=utf8mb4_general_ci
远程访问
1、my.conf 注释掉本地监听
[mysqld] #bind_address=127.0.0.1
2、更新账号的 host
update mysql.user set host='%' where user='root';
