Open Stack

Hello,

I am pretty new to OpenStack and trying to set up a lab as mentioned
in the "OpenStack Installation Guide for Ubuntu 14.04" (Kilo) document

On page 42 of the guide below command is mentioend to verify:

exxxx at controller:~$ openstack --os-auth-url http://controller:35357 \

--os-project-name admin --os-username admin --os-auth-type password \
token issue Password:*ERROR: openstack An unexpected error prevented
the server from fulfilling your request. (HTTP 500) (Request-ID:
req-191a210a-b8b0-458b-9831-d1686316b07e)*

[DEFAULT] admin_token = 2c3ca56faacec71498d4
verbose = true l
log_dir = /var/log/keystone
[database]
connection = mysql://keystone:Pass.2015@controller/keystone
[memcache] servers = localhost:11211
[revoke]
driver = keystone.contrib.revoke.backends.sql.Revoke
[token]
provider = keystone.token.providers.uuid.Provider
driver = keystone.token.persistence.backends.memcache.Token

Could anyone please help. Thanks in advance :)