Keystone is now hosted on apache server and works as a WSGI....but as per the repo and packages keystone also comes with the rest of the stuff so you need to disable keystone :-

Disable the keystone service from starting automatically after installation:

echo "manual" > /etc/init/keystone.override

If you still find issues then you need to configure apache server and also check the endpoints. The endpoints decide where the URL's land to. Follow this page:-

http://docs.openstack.org/kilo/install-guide/install/apt/content/keystone-install.html