[magnum] Is magnum support region_name in keystone auth config?

Hi magnum team.

It seems that a magnum does not support region_name which is in the keystone_auth and keystone_authtoken section in magnum conf.

The internal keystone client of keystoneauth1 only uses the lowest UUID of endpoints for keystone url. [1]

And also KeystoneClientV3 's get_auth[2] and get_legacy_auth[3] also don't support region_name as an argument.

So, My question is how can I make magnum only use the keystone URL written in the config?

Best regards Seongsoo Cho

[1] https://github.com/openstack/keystoneauth/blob/master/keystoneauth1/access/s... [2] https://github.com/openstack/magnum/blob/master/magnum/common/keystone.py#L7... [3] https://github.com/openstack/magnum/blob/master/magnum/common/keystone.py#L1...