There are a couple ways to achieve this on Fly short of Fly letting orgs muck with internal DNS zones.
- Pinning a VM to a host (by mounting a volume) so its
alloc-id
doesn’t change as often. - If
<appname>
only ever deploys one VM per region, then<region>.<appname>.internal
is as good as aCNAME
(alias) to that singular VM.