First, you will need to install keystone, if you haven't done so already.
installing
Change driectory to your install path
Change directory to your install path.
Run the following to create the first tennant:
$> bin/keystone-manage tenant add "MyTenant"
Run the following to create the first tenant admin:
$> bin/keystone-manage user add MyAdmin P@ssw0rd MyTenant
Note
Some reserved roles are defined (and can be modified) through the keystone.conf in the /etc folder.
Associate your tenant admin with the Admin role:
$> bin/keystone-manage role grant Admin MyAdmin
adminAPI_curl_examples serviceAPI_curl_examples