數據庫開啟遠程訪問

先開放3306端口
#開放3306
firewall-cmd --permanent --add-port=3306/tcp systemctl restart firewalld.service #查看端口是否開放 firewall-cmd --query-port=3306/tcp 
查看所有開放端口 #list firewall-cmd --list-all

最后修改數據庫遠程訪問權限

mysql>use mysql
mysql>grant all privileges on *.* to 'root'@'%' identified by 'xxxxx(密碼)'; mysql>flush privileges;