Fix reverse DNS for GCP IPs
Noted in the 2018-06-21 failover
Various IPs on the GCP side are missing appropriate reverse DNS.
For instance, gprd.gitlab.com
resolves to 35.231.145.151
, which has reverse DNS of 151.145.231.35.bc.googleusercontent.com
Since post-failover, we want gitlab.com
to point to this IP, we should ensure the reverse DNS is set to gitlab.com
We don't send email via these IPs, so it's not super-important, but I do think it's desirable.
Other IPs that matter will include the ones that registry.gprd.gitlab.com
, gprd.gitlab.io
and altssh.gprd.gitlab.com
(doesn't exist yet) will resolve to. Perhaps I'm missing others as well.
We should consider setting appropriate rDNS for IPs in gstg as well