# add EPEL 
rpm -Uvh http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
 
# update 
yum -y update

# install 
yum install vim openstack-utils openstack-keystone python-keystoneclient mysql mysql-server MySQL-python
 
# auto start mysql
chkconfig --level 2345 mysqld on
service mysqld start
 
#init MySQL 
/usr/bin/mysql_secure_installation
 
#init openstack-db
openstack-db --init --service keystone --password //yourpassword//
 
# edit keystone config file
vim /etc/keystone/keystone.conf 
 
# change the following lines
#   admin_token = tokentoken

The packages might have to be installed one by one separately.

service openstack-keystone start
 
chkconfig openstack-keystone on

init the db

keystone-manage db_sync