运行官方mysql 镜像

//目前最新的为mysql  8 
 sudo docker run -itd  --restart unless-stopped  --net=host  --name mysql -p3306:3306 -e MYSQL_ROOT_PASSWORD=root  mysql

 mysql 官方docker 需要重新设置密码，否则无法远程连接
step 1 : docker exec -it  [容器id] /bin/bash
step 2 : 登陆mysql  ==>  mysql -uroot -h localhost -proot
  >use mysql;
  mysql>
  ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY 'newpassword'

常用的mysql5.7：

sudo docker run -it -d --restart unless-stopped -p 13306:3306 -h mysql --name mysql -e MYSQL_ROOT_PASSWORD=root 　alanpeng/mysql5.7-replication-docker

sudo docker run -itd  --restart unless-stopped -p 3306:3306 --net=host -h mysql --name mysql -e MYSQL_ROOT_PASSWORD=root alanpeng/mysql5.7-replication-docker

修改：

（如果不是在docker中 vi /etc/mysql/my.cnf） 

   vi   /etc/mysql/mysql.conf.d/mysqld.cnf

cd    /etc/mysql/mysql.conf.d

echo 'sql_mode=STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION' >> mysqld.cnf

echo 'explicit_defaults_for_timestamp = 1' >> mysqld.cnf 

 echo 'max_allowed_packet= 500M' >> mysqld.cnf 

 mysql -uroot -p000000

1）展示user表的结构

mysql>desc user;

2）查询user表

mysql>select User, Host, Password from user;

3）修改user表，把Host表内容修改为%

mysql>update user set host='%' where user='root' and host='localhost';

4）删除root用户的其他host

mysql>delete from user where User='root'and Host='hadoop001 ';

mysql>delete from user where User='root'and Host='127.0.0.1';

mysql>delete from user where User='root'and Host='::1';

6）刷新

mysql>flush privileges;