wget http://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.17-1.el6.x86_64.rpm-bundle.tar
tar xf mysql-5.7.17-1.el6.x86_64.rpm-bundle.tar
yum install -y mysql-*

service mysqld start
sleep 1
defaultmysqlpwd=`grep 'A temporary password' /var/log/mysqld.log | awk -F"root@localhost: " '{ print $2}' `
/usr/bin/mysql -uroot -p${defaultmysqlpwd} <<EOF
set global validate_password_policy = 0;
SET PASSWORD = PASSWORD('shanghai2017');
grant all privileges on *.* to root@'%' identified by 'shanghai2017';
EOF
sleep 1
service mysqld restart