The following file is empty: ceph-mon_at.service.conf The file is even used; systemd_install_serviced "${FILESDIR}/ceph-mon_at.service.conf" "ceph-mon@.service" However, I seriously doubt it's really productive to install an empty template. If you really insist on doing so, you can create the file locally: touch ceph-mon@.service.conf systemd_install_serviced ceph-mon@.service.conf
commit 4c55d60a47fc9a1a81e185850c042c00d6534e5e Author: Patrick McLean <chutzpah@gentoo.org> Date: Thu Jul 27 14:22:55 2017 -0700 sys-cluster/ceph: Remove empty files/ceph-mon_at.service.conf Gentoo-Bug: 622418 Package-Manager: Portage-2.3.6, Repoman-2.3.3