安装mysql5.7与创建用户和远程登录授权

环境:ubuntu18.04

参考文章:安装并远程登录授权:https://www.cnblogs.com/chancy/p/9444187.html

　　　　用户管理:https://www.cnblogs.com/wanghetao/p/3806888.html

　　　　添加docker用户:https://www.jb51.net/article/115422.htm

Ubuntu18.04安装mysql5.7

1.1安装

首先执行下面三条命令：

# 安装mysql服务
sudo apt-get install mysql-server
# 安装客户端
sudo apt install mysql-client
# 安装依赖
sudo apt install libmysqlclient-dev
# 检查状态
sudo netstat -tap | grep mysql

1.2设置root密码

mysql5.7安装完成后普通用户不能进mysql，原因：root的plugin被修改成了auth_socket，用密码登陆的plugin应该是mysql_native_password，直接用root权限登录就不用密码,修改root密码和登录验证方式：

$ sudo su
# mysql
mysql>
mysql> select user, plugin from mysql.user;
+------------------+-----------------------+
| user             | plugin                |
+------------------+-----------------------+
| root             | auth_socket           |
| mysql.session    | mysql_native_password |
| mysql.sys        | mysql_native_password |
| debian-sys-maint | mysql_native_password |
+------------------+-----------------------+
4 rows in set (0.00 sec)
mysql> update mysql.user set authentication_string=PASSWORD('123456'), plugin='mysql_native_password' where user='root';
mysql> flush privileges;
mysql> exit
Bye
# exit
$ sudo /etc/init.d/mysql restart
$ mysql -uroot -p

Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.7.22-0ubuntu18.04.1 (Ubuntu)

Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> 

1.3创建docker用户并把数据库docker_mysql授权给docker用户

1 2 3 4 5 6 7 8

use mysql; select host, user from user; -- 因为mysql版本是5.7，因此新建用户为如下命令： create user docker identified by '123456'; -- 将docker_mysql数据库的权限授权给创建的docker用户，密码为123456： grant all on docker_mysql.* to docker@'%' identified by '123456' with grant option; -- 这一条命令一定要有： flush privileges;

1.4配置mysql远程登录

# 修改配置文件，注释掉bind-address = 127.0.0.1
$ sudo vi /etc/mysql/mysql.conf.d/mysqld.cnf

# 保存退出，然后进入mysql服务，执行授权命令：
$ mysql -uroot -p

mysql> grant all on *.* to root@'%' identified by '123456' with grant option; 　　(授权可以用root用户远程登录并可以访问所有数据库)
Query OK, 0 rows affected, 1 warning (0.00 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

mysql> exit
Bye
$ sudo /etc/init.d/mysql restart