docker run --name mysql5.7 -p 3306:3306 -e MYSQL_ROOT_PASSWORD=root -d mysql:5.7
docker exec -it mysql5.7 /bin/bash
mysql -uroot -p
grant all privileges on *.* to root@'%' identified by 'root';、
flush privileges;
quit;
exit
docker run --restart=always -p 3306:3306 --name mysql5.7 -e MYSQL_ROOT_PASSWORD=root -d mysql:5.7 --character-set-server=utf8mb4 --collation-server=utf8mb4_unicode_ci