step 1 : =>

sudo service stop mysql 
sudo mkdir /var/run/mysqld
sudo chown mysql:mysql /var/run/mysqld
sudo mysqld_safe --skip-grant-tables

step 2 : =>

mysql -uroot
select User, host, authentication_string,plugin from mysql.user;
update mysql.user set authentication_string=PASSWORD('123456YOURPASSWORD') where user='root';
update mysql.user set plugin='mysql_native_password' where user='root'; 
FLUSH PRIVILEGES;
exit; 


step 3 : =>
#kill pod


step 4 : =>
sudo service start mysql