更换yum源地址(阿里云不需要更换源)
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备份
mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
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更换源
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
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生成缓存
yum makecache
安装Mysql8
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在centos启用Mysql yum存储库
rpm -Uvh https://repo.mysql.com/mysql80-community-release-el7-3.noarch.rpm
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安装mysql8社区服务器(由于mysql yum存储库具有用于多个版本的mysql存储库配置,因此需要禁用mysql repo文件中的所有存储库)
sed -i 's/enabled=1/enabled=0/' /etc/yum.repos.d/mysql-community.repo
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安装mysql80
yum --enablerepo=mysql80-community install mysql-community-server
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查看mysql的状态
service mysqld status
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启动mysql服务
service mysqld start
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查询mysql的默认密码(安装的过程中,会给root账号授予一个临时密码,该密码用于修改真实的密码)
grep "A temporary password" /var/log/mysqld.log
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mysql安全安装
mysql_secure_installation
提示输入当前的密码
Enter password for user root:
在上方输入临时密码,安装Enter。将提示一下信息
The existing password for the user account root has expired. Please set a new password. New password: Re-enter new password:
需要为root账户输入两次新的密码。默认输入yes(y)
Remove anonymous users? (Press y|Y for Yes, any other key for No) : y Disallow root login remotely? (Press y|Y for Yes, any other key for No) : y Remove test database and access to it? (Press y|Y for Yes, any other key for No) : y Reload privilege tables now? (Press y|Y for Yes, any other key for No) : y
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重启mysql服务
service mysqld restart
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设置开机自启动
chkconfig mysqld on
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设置远程访问
mysql> use mysql;
查看user用户
mysql> select user,host from user; +------------------+-----------+ | user | host | +------------------+-----------+ | mysql.infoschema | localhost | | mysql.session | localhost | | mysql.sys | localhost | | root | localhost | +------------------+-----------+
创建root远程用户(输入你的password)
mysql> create user 'root'@'%' identified by 'yourpassword';
授权用户可以远程登陆
mysql> grant all on *.* to 'root'@'%';
修改加密方式(输入你的password)
mysql> alter user 'root'@'%' identified with mysql_native_password by 'yourpassword';
刷新权限
mysql> flush privileges;
查看防火墙状态
systemctl status firewalld
开启防火墙
systemctl start firewalld
添加端口号
firewall-cmd --zone=public --add-port=3306/tcp --permanent
刷新重置
firewall-cmd --reload
阿里云服务器需要进入到网页系统中,开启安全组中的端口3306