Answers for ""Host '172.22.0.2' is not allowed to connect to this MySQL server"

host is not allowed to connect to this mysql server

CREATE USER 'username'@'localhost' IDENTIFIED BY 'password';

GRANT ALL PRIVILEGES ON *.* TO 'username'@'localhost' WITH GRANT OPTION;

CREATE USER 'username'@'%' IDENTIFIED BY 'password';

GRANT ALL PRIVILEGES ON *.* TO 'username'@'%' WITH GRANT OPTION;

FLUSH PRIVILEGES;

Host '' is not allowed to connect to this MySQL server

GRANT ALL PRIVILEGES ON *.* TO root@my_ip IDENTIFIED BY ‘root_password‘ WITH GRANT OPTION;