yum 源安装MySQL

执行命令：yum install –y mysql-server
执行完成之后，启动 service mysqld start
[root@node1 ~]# mysql
mysql> use mysql;
mysql> select user,password from user;
mysql> delete from user;
mysql> GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '123456' WITH GRANT OPTION;
mysql> flush privileges;
执行如下命令，将 mysql 设置成开机启动，如果不设置开机启动，后期每次启动 ClouderaManager 时，需要手动启动 MySQL。
chkconfig mysqld on
最后登录MySQL：mysql -uroot -p123456