CentOS安装MySQL

1. 下载并安装MySQL官方的 Yum Repository

wget -i -c http://dev.mysql.com/get/mysql57-community-release-el7-10.noarch.rpm
yum -y install mysql57-community-release-el7-10.noarch.rpm
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2. 安装MySQL服务器

yum -y install mysql-community-server
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3. 首先启动MySQL

systemctl start  mysqld.service
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查看MySQL运行状态，运行状态如图：systemctl status mysqld.service

4. 修改密码

要修改密码要先通过默认的root密码进入
获取默认密码：grep "password" /var/log/mysqld.log
有密码之后进入数据库：mysql -uroot -p
进来之后必须修改密码，不然也操作不了数据库：

ALTER USER 'root'@'localhost' IDENTIFIED BY 'your password';
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5. 开启远程访问

grant all privileges on *.* to 'root'@'%' identified by 'password' with grant option;
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刷新 flush privileges;

6. 为firewalld添加开放端口

添加mysql端口3306和Tomcat端口8080

firewall-cmd --zone=public --add-port=3306/tcp --permanent
firewall-cmd --zone=public --add-port=8080/tcp --permanent
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重新载入

firewall-cmd --reload
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