Comment 16 for bug 1512984

Code snippet:

def create_role(name, user=None, tenant=None):
    """Creates a role if it doesn't already exist. grants role to user"""
    import manager
    manager = manager.KeystoneManager(endpoint=get_local_endpoint(),
                                      token=get_admin_token())
    roles = [r._info for r in manager.api.roles.list()]
    if not roles or name not in [r['name'] for r in roles]:
        manager.api.roles.create(name=name)
        log("Created new role '%s'" % name, level=DEBUG)
    else:
        log("A role named '%s' already exists" % name, level=DEBUG)

Keystoneclient returns role names as created = however it will throw a conflict if you try to create a role with different capitalization:

admin
Admin

will conflict by the looks of things.