On Thu, Sep 28, 2017 at 4:04 AM, Jaime Crespo &lt;jcrespo(a)wikimedia.org&gt; wrote: In theory this would work. It looks like in practice however it currently will not work. The process I used to make the *.{analytics,web}.db.svc.eqiad.wmflabs service name aliases is based on the production dblist files. Specifically the script makes CNAME DNS records for each host listed in s[1-7].dblist as read from https://noc.wikimedia.org/conf/ which point to the correct s[1-7].{analytics,web}.db.svc.eqiad.wmflabs A record. The centralauth database isn't a wikidb properly so it is not listed in the dblist files. I opened a bug about this (<https://phabricator.wikimedia.org/T176978>). I'll find a way to create additional aliases for the handful of special databases that are in the cluster.