Functionality should be implemented via the new style vyos-1x interface.

Agree,
@c-po what will be best way to start with that,
i can collect vyos settings a map them to pdns config options, not that much there actually

That would be great!
In parallel the XML file for the config nodes can be created. I‘d keep the nodes as they are right now to kot break running setups.

This is a first configuration file generated from the vyos-1x python scripts:

### Autogenerated by vyos-config-dns-forwarding.py on Fri, 13 Apr 2018 20:31:09 ###
daemon=yes
threads=1
allow-from=0.0.0.0/0
log-common-errors=yes
local-address=172.16.37.240, 127.0.0.1, 172.16.254.35, 172.16.77.1, fe80::250:56ff:feaa:8b61%eth0, ::1
max-cache-entries=1000
forward-zones=bar.net=1.1.1.1, moo.com=2.2.2.2;9.9.9.9;2001:DB8::1:25

# statically configured: 1.1.1.1, 9.9.9.9
# system: 172.16.100.20, 172.16.100.10
forward-zones-recurse=.=1.1.1.1, 9.9.9.9; 172.16.100.20, 172.16.100.10

Please note, I have not found any replacement which implements the following command: set service dns forwarding query-all-servers which set the `all-servers' option in dnsmasq (http://www.thekelleys.org.uk/dnsmasq/docs/dnsmasq-man.html). For me this command looks deprecated.

@dmbaturin How are such commands removed?

As set service dns forwarding query-all-server was introduced in VyOS 1.2.x some time ago I decided to drop it as it was not yet released. I hope this is ok.

PowerDNS recursor also supports multiple IPV4 and IPv6 nameservers when using a DNS zone forwarding

set service dns forwarding domain foo.com server 2001:DB8::1
set service dns forwarding domain foo.com server 2001:DB8::2
set service dns forwarding domain foo.com server 1.1.1.1
set service dns forwarding domain foo.com server 9.9.9.9

dnsmasq is now replaced in favour of pdns recursor.