CentOS 7 系統安裝與遠端連線 MySQL 5.7
阿新 • • 發佈：2018-11-14
本文是滴滴雲開源框架教程系列文章的一篇。
CentOS 7 版本將MySQL資料庫軟體從預設的程式列表中移除，那麼CentOS 7版本如何安裝MySQL呢，本文將指導大傢俱體的方法。
以滴滴雲DC2雲主機上的操作為例，首先切換賬戶許可權到root許可權，登入CentOS 7 系統的雲主機後輸入：
[[email protected] dc2-user]# sudo su
切換成root許可權，然後執行下面的安裝方法：
官網安裝mysql-server方法：
[[email protected] dc2-user]# yum install -y wget
[[email protected] dc2-user]# wget http://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm
[[email protected] dc2-user]# rpm -ivh mysql57-community-release-el7-8.noarch.rpm
[[email protected] dc2-user]# yum install mysql-community-server -y
啟動MySQL
[[email protected] 驗證是否啟動
[[email protected] dc2-user]# systemctl status mysqld
MySQL安裝完成之後，在/var/log/mysqld.log檔案中給root生成了一個預設密碼。通過下面的方式找到root預設密碼，然後登入MySQL進行修改：
[[email protected] dc2-user]# grep 'temporary password' /var/log/mysqld.log
2018-05-23T09:24:03.800263Z 1 [Note] A temporary password is generated for 可以看到初始密碼為 p?iT>b?iv7st，登入資料庫：
[[email protected] dc2-user]# mysql -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.Your MySQL connection id is 2Server version: 5.7.22Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respectiveowners.Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql>
重新設定root密碼
mysql> set password for 'root'@'localhost'=password('[email protected]');
為資料庫設定遠端連線
首先在防火牆規則中開啟3306埠
設定MySQL
mysql> grant all privileges on *.* to [email protected]'%'identified by '123456';
如果是非root使用者（mysql的root使用者）遠端登入，則要先建立使用者
mysql>create user 'username'@'%' identified by 'password';
然後再進行連線
[[email protected] dc2-user]#mysql -h <IP地址> -uusername -p
Enter password: ******
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 11
Server version: 5.6.39 MySQL Community Server (GPL)
Copyright (c) 2000, 2017, 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>