Comment 2 for bug 1975718

I believe this is relevant only for master?

Eventually, we've replaced SSH key-based auth with certificate based one, which should not require keys, and certificates are generated and distributed using ssh_keypairs role and this playbook:
https://opendev.org/openstack/openstack-ansible/src/branch/master/playbooks/certificate-ssh-authority.yml

So SSH keys are not supposed to work intentionally. But SSH auth between keystone containers is expected to work at the same time.