安裝mysql 8.0.17並配置遠程訪問

1、安裝前準備

查看數據庫版本命令： mysql --version

mysql-community-common-8.0.17-1.el7.x86_64.rpm

mysql-community-libs-8.0.17-1.el7.x86_64.rpm

mysql-community-client-8.0.17-1.el7.x86_64.rpm

mysql-community-server-8.0.17-1.el7.x86_64.rpm

2、安裝RPM包

依次安裝上述RPM包，先後安裝包爲依賴關係。

# rpm -ivh mysql-community-common-8.0.17-1.el7.x86_64.rpm
# rpm -ivh mysql-community-libs-8.0.17-1.el7.x86_64.rpm
# rpm -ivh mysql-community-client-8.0.17-1.el7.x86_64.rpm
# rpm -ivh mysql-community-server-8.0.17-1.el7.x86_64.rpm

3、 查詢root帳戶初始密碼

mysql 8.0版本的初始密碼默認非空，安裝時自動生成，存儲在/var/log/mysqld.logzhon中。

# grep 'temporary password' /var/log/mysqld.log
2019-09-25T06:52:32.788931Z 5 [Note] [MY-010454] [Server] A temporary password is generated for root@localhost:~~ aVcrv:9nEnsd~~

4、修改root密碼

修改密碼默認有安全性要求，對密碼複雜度有控制。

mysql> alter user 'root'@'localhost' identified by 'redhat';
ERROR 1819 (HY000): Your password does not satisfy the current policy requirements
mysql> alter user 'root'@'localhost' identified by '1qaz!QAZ';
Query OK, 0 rows affected (0.15 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.01 sec)

5、查看當前用戶配置信息

mysql> show databases;
mysql> use mysql;
mysql> select user,host,plugin from user;

6、新建一用戶用於遠程訪問

mysql> create user 'wangwang'@'%' identified by '1qaz!QAZ';
Query OK, 0 rows affected (0.08 sec)
mysql> grant all on *.* to 'wangwang'@'%';
Query OK, 0 rows affected (0.12 sec)
mysql> select user,host,plugin from user;

該帳戶的plugin加密方式爲caching_sha2_password， MySQL 8.0前的客戶端在鏈接 MySQL 8.0服務器時會出現 Authentication plugin 'caching_sha2_password' cannot be loaded 的錯誤（須要更該爲mysql_native_password）。

7、修改加密方式

修改加密規則

mysql> alter user 'wangwang'@'%' identified by '1qaz!QAZ' password expire never; 
Query OK, 0 rows affected (0.17 sec)

更新用戶密碼

mysql> alter user 'wangwang'@'%' identified with mysql_native_password by '1qaz!QAZ';
Query OK, 0 rows affected (0.04 sec)

保存更改

mysql> flush privileges;
Query OK, 0 rows affected (0.05 sec)

查詢信息

mysql> select user,host,plugin from user;

8、測試鏈接

能夠使用Navicat進行測試。