Comment 1 for bug 1865050

It doesn't look like tripleo-heat-templates is detecting the certificate and populating it here [0], but it does when generating the stackrc file in post-deployment steps [1].

[0] https://opendev.org/openstack/tripleo-heat-templates/src/commit/b5ef03c9c939db551b03e9490edc6981ff582035/deployment/keystone/keystone-container-puppet.yaml#L711-L720
[1] https://opendev.org/openstack/tripleo-heat-templates/src/commit/b5ef03c9c939db551b03e9490edc6981ff582035/extraconfig/post_deploy/undercloud_post.yaml#L121