From init.sls in /srv/pillar/agn_openstack/agn_keystone/init.sls

# first include parameterized values
#
include:
   - agn_openstack.agn_keystone.agn_keystone_jinja_params
   - agn_openstack.agn_keystone.agn_keystone_yaml_params


from /srv/salt/pillar/agn_openstack/agn_keystone/agn_keystone_yaml_params
# set the passwords for the services and their users
AGN_GLANCE_PASSWD: &glance_passwd 'glance'
~
~
Back in /srv/pillar/agn_openstack/agn_keystone/init.sls  after the include

       PASSWD: *glance_passwd


error message

  Rendering SLS 'agn_openstack.agn_keystone' failed, render error:
found undefined alias 'glance_passwd'
  in "<unicode string>", line 79, column 16:
           PASSWD: *glance_passwd