I believe this must have been from yuvi experimenting but that it is now totally stale and cruft.
labservices1001:~# cat /var/zones/tools.eqiad.wmflabs # tools-docker-registry 300 IN CNAME tools-docker-registry-01.tools.eqiad.wmflabs.
tools-bastion-03:~# host tools-docker-registry.tools.eqiad.wmflabs Host tools-docker-registry.tools.eqiad.wmflabs not found: 3(NXDOMAIN)
labservices1002:~# ls /var/zones/ labsdb
If it ever did work, it doesn't now, and if it ever did work it wasn't puppetized or duplicated to labservices1002.