On Wed, Feb 15, 2023, at 05:31, Aditya Sharma wrote: > We were thinking of an approach where we keep on serving the last known good > FQDNs even after the TTL has expired (only when we are unable to communicate > with the resolvers). For that, we need to intercept the DNS calls and > maintain some kind of local cache. So, wanted to understand how we can extend > systemd-resolved service to serve the purpose.
systemd-resolved already has a cache, so the only thing you'd need to add is the ability to control whether records expire from the cache or continue to be served.
