How to get the systemd resolver to resolve local (i.e. unqalified) names?

[Tom H]

On Sat, Jun 3, 2017 at 9:30 AM, Chris Green <cl at isbd.net> wrote:
>
> Before the systemd-resolved came along my systems resolved local (i.e.
> unqualifed) names quite happily, e.g. on my older xubuntu 16.04
> systems I can do:-
>
>         chris at backup:~$ host esprimo
>         esprimo.zbmc.eu has address 192.168.1.3
>         chris at backup:~$ host esprimo.zbmc.eu
>         esprimo.zbmc.eu has address 192.168.1.3
>         chris at backup:~$ host pi
>         pi.zbmc.eu has address 192.168.1.2
>         chris at backup:~$
>
> ... but on a new 17.04 system running systemd-resolved:-
>
>         chris$ host esprimo
>         Host esprimo not found: 2(SERVFAIL)
>         chris$ host esprimo.zbmc.eu
>         esprimo.zbmc.eu has address 192.168.1.3
>         chris$ host pi
>         Host pi not found: 2(SERVFAIL)
>         chris$
>
> There is a local DNS server running on the LAN which provides DHCP and
> DNS to all systems. As can be seen from above the older systems (not
> using systemd-resolver) seem to send the unqualified name requests to
> the DNS system and get the right result. How can I configure
> systemd-resolved to do the same thing?

# mkdir -p /etc/systemd/resolved.conf.d

# vi /etc/systemd/resolved.conf.d/local-server.conf
[Resolve]
DNS=ip_address_of_local_dns_server other_dns_server_if_needed