If you are moving from Keystone v2 to v3 call, you need more variables in your environment. Here is a template for an update keystone.rc for V3, in jinja format:

export OS_AUTH_URL=http://{{ keystone_hostname }}:5000/v3
export OS_USERNAME={{ username }}
export OS_PASSWORD={{ password }}
export OS_USER_DOMAIN_NAME=Default
export OS_PROJECT_DOMAIN_NAME=Default
export OS_PROJECT_NAME={{ project_name }}
export OS_IDENTITY_API_VERSION=3