on point 1, I've not seen local authoritative DNS take that long to resolve a local address. If the local DNS has to recurse out to find an address, then yes.

on point 1, I've not seen local authoritative DNS take that long to resolve a local address. If the local DNS has to recurse out to find an address, then yes. But if thats the case, then something has gone wrong with the setup. (this is local service discovery after all.) on point 2: Yes, long running processes cache DNS. so does SSSD and nslcd. However in the world of containers, the first point of call for debugging appears to redeploy, so this goes away, by accident. (and not entirely convincingly) on point 3, yes, yes very much.