MySQL 8 安装-CentOS 7

先下载https://cdn.mysql.com//Downloads/MySQL-8.0/mysql-8.0.18-1.el7.x86_64.rpm-bundle.tar。并上传到CentOS处。

mkdir mysql
cd mysql

#将下载的文件上传此目录

tar xvf mysql-8.0.18-1.el7.x86_64.rpm-bundle.tar
mysql-community-libs-8.0.18-1.el7.x86_64.rpm
mysql-community-devel-8.0.18-1.el7.x86_64.rpm
mysql-community-embedded-compat-8.0.18-1.el7.x86_64.rpm
mysql-community-libs-compat-8.0.18-1.el7.x86_64.rpm
mysql-community-common-8.0.18-1.el7.x86_64.rpm
mysql-community-test-8.0.18-1.el7.x86_64.rpm
mysql-community-server-8.0.18-1.el7.x86_64.rpm
mysql-community-client-8.0.18-1.el7.x86_64.rpm

先卸载MariaDB。

#查询
rpm -pa | grep mariadb
mariadb-libs-5.5.60-1.el7_5.x86_64

#卸载
rpm -e mariadb-libs-5.5.60-1.el7_5.x86_64

安装。

yum install -y net-tools
rpm -ivh mysql-community-common-8.0.18-1.el7.x86_64.rpm
rpm -ivh mysql-community-libs-8.0.18-1.el7.x86_64.rpm
rpm -ivh mysql-community-client-8.0.18-1.el7.x86_64.rpm
rpm -ivh mysql-community-server-8.0.18-1.el7.x86_64.rpm
rpm -ivh mysql-community-libs-compat-8.0.18-1.el7.x86_64.rpm

初始化mysql，并启动mysqld服务。

mysqld initialize --console

systemctl start mysqld

查找临时密码，并登陆mysql。

grep "temporary password" /var/log/mysqld.log
2019-12-13T14:26:42.238771Z 5 [Note] [MY-010454] [Server] A temporary password is generated for root@localhost: D/-A9bpU6)+!

#此处输入密码：D/-A9bpU6)+!
mysql -uroot -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 8
Server version: 8.0.18

Copyright (c) 2000, 2019, 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>

#修改临时密码
mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'MySQL8--';
Query OK, 0 rows affected (0.03 sec)

mysql> exit

#重新登陆
mysql -uroot -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 8
Server version: 8.0.18

Copyright (c) 2000, 2019, 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>

因为安全原因，MySQL安装完成后初始只能本地登陆，不能远程登陆。

#在另一台CentOS上可以在安装一个MySQL客户端测试。
mysql -h192.168.1.11 -uroot -p
Enter password:
ERROR 1130 (HY000): Host '192.168.1.30' is not allowed to connect to this MySQL server

需要修改配置支持远程登陆。

use mysql;

select user, authentication_string, host from user;
+------------------+------------------------------------------------------------------------+-----------+
| user             | authentication_string                                                  | host      |
+------------------+------------------------------------------------------------------------+-----------+
| mysql.infoschema | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED | localhost |
| mysql.session    | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED | localhost |
| mysql.sys        | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED | localhost |
| root             | $A$005$5K,]b.7CQUC5wInjKCpCJF6qGgp4yhtsL4NJD7DupqgXTdPBB1zk2 | localhost |
+------------------+------------------------------------------------------------------------+-----------+
4 rows in set (0.00 sec)

update user set host='%' where user='root';

mysql> select user, authentication_string, host from user;
+------------------+------------------------------------------------------------------------+-----------+
| user             | authentication_string                                                  | host      |
+------------------+------------------------------------------------------------------------+-----------+
| root             | $A$005$5K,]b.7CQUC5wInjKCpCJF6qGgp4yhtsL4NJD7DupqgXTdPBB1zk2 | %         |
| mysql.infoschema | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED | localhost |
| mysql.session    | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED | localhost |
| mysql.sys        | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED | localhost |
+------------------+------------------------------------------------------------------------+-----------+
4 rows in set (0.00 sec)

FLUSH PRIVILEGES;

在另一台CentOS的MySQL客户端重新登录一次。

mysql -h192.168.1.11 -uroot -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 12
Server version: 8.0.18 MySQL Community Server - GPL

Copyright (c) 2000, 2019, 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>