On 2022-04-19 13:22:53 +0300, Michael Tokarev wrote:
> In my understanding over the years, I expected the nameservers
> received from/by DHCP should be used *first*. I did this with
> unbound or dnsmasq even before resolvconf has been written -
> using custom dhcp script to reconfigure local DNS resolver.
> 
> I don't even know unbund has a way to specify "fallback"
> nameservers. You either set forwarders for a zone or you don't,
> there's no _notion_ of fallback per se.

The fallback is what resolvconf expects and precisely why
bug 1003135 was reassigned from resolvconf to unbound:

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1003135#40

  "In fact, unbound comes with resolvconf integration, so it should
  know about other nameservers coming from DHCP. [...]"

Note: resolvconf filters out nameservers coming from DHCP only those
that are placed after 127.0.0.1, i.e. those that are normally used as
a fallback when resolvconf isn't installed, because it assumes that
this fallback is provided by the local nameserver (here, unbound).

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