inet 127.0.0.1

[edit service dns forwarding]
vyos@beijing# set domain test.lan server 8.8.8.8
[edit service dns forwarding]
vyos@beijing# commit
[ service dns forwarding ]
> /usr/libexec/vyos/conf_mode/dns_forwarding.py(110)get_config()
-> return None
(Pdb) dir(conf)
['_Config__session_env', '__class__', '__delattr__', '__dict__', '__dir__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__gt__', '__hash__', '__init__', '__le__', '__lt__', '__module__', '__ne__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__', '__weakref__', '_cli_shell_api', '_level', '_make_command', '_make_path', '_run', '_running_config', '_session_config', 'exists', 'exists_effective', 'get_config_dict', 'get_level', 'in_session', 'is_leaf', 'is_multi', 'is_tag', 'list_effective_nodes', 'list_nodes', 'return_effective_value', 'return_effective_values', 'return_value', 'return_values', 'session_changed', 'set_level', 'show_config']
(Pdb) conf.get_level()
[]
(Pdb) conf.show_config()
' allow-from 10.33.0.0/16\n allow-from 10.0.0.0/24\n domain 1e100.net {\n     server 10.0.0.254\n }\n domain amazonaws.com {\n     server 10.0.0.254\n }\n domain amazon.com {\n     server 10.0.0.254\n }\n domain blogspot.com {\n     server 10.0.0.254\n }\n domain blogspot.it {\n     server 10.0.0.254\n }\n domain box.com {\n     server 10.0.0.254\n }\n domain cloudfront.com {\n     server 10.0.0.254\n }\n domain coggle.it {\n     server 10.0.0.254\n }\n domain c.android.clients.google.com {\n     server 10.0.0.254\n }\n domain dn.rawgit.com {\n     server 10.0.0.254\n }\n domain docker.com {\n     server 10.0.0.254\n }\n domain dropbox.com {\n     server 10.0.0.254\n }\n domain duckduckgo.com {\n     server 10.0.0.254\n }\n domain facebook.com {\n     server 10.0.0.254\n }\n domain facebook.net {\n     server 10.0.0.254\n }\n domain ggpht.com {\n     server 10.0.0.254\n }\n domain gist.github.com {\n     server 10.0.0.254\n }\n domain git-scm.com {\n     server 10.0.0.254\n }\n domain github.com {\n     server 10.0.0.254\n }\n domain github.io {\n     server 10.0.0.254\n }\n domain gmail.com {\n     server 10.0.0.254\n }\n domain golang.org {\n     server 10.0.0.254\n }\n domain google-analytics {\n     server 10.0.0.254\n }\n domain googleapis.com {\n     server 10.0.0.254\n }\n domain googlesource.com {\n     server 10.0.0.254\n }\n domain googlevideo.com {\n     server 10.0.0.254\n }\n domain google.com {\n     server 10.0.0.254\n }\n domain google.com.hk {\n     server 10.0.0.254\n }\n domain google.co.jp {\n     server 10.0.0.254\n }\n domain gopkg.in {\n     server 10.0.0.254\n }\n domain greatfire.org {\n     server 10.0.0.254\n }\n domain gstatic.com {\n     server 10.0.0.254\n }\n domain g.doubleclick.net {\n     server 10.0.0.254\n }\n domain h.m.wikipedia.org {\n     server 10.0.0.254\n }\n domain h.wikipedia.org {\n     server 10.0.0.254\n }\n domain jenkins-ci.org {\n     server 10.0.0.254\n }\n domain jetbrains.com {\n     server 10.0.0.254\n }\n domain lcw.ff.avast.com {\n     server 10.0.0.254\n }\n domain lithium.com {\n     server 10.0.0.254\n }\n domain medium.com {\n     server 10.0.0.254\n }\n domain n.wikipedia.org {\n     server 10.0.0.254\n }\n domain opendaylight.org {\n     server 10.0.0.254\n }\n domain openvpn.net {\n     server 10.0.0.254\n }\n domain pge.com {\n     server 10.0.0.254\n }\n domain pinimg.com {\n     server 10.0.0.254\n }\n domain pinterest.com {\n     server 10.0.0.254\n }\n domain quoracdn.net {\n     server 10.0.0.254\n }\n domain quora.com {\n     server 10.0.0.254\n }\n domain reddit.com {\n     server 10.0.0.254\n }\n domain steamcommunity.com {\n     server 10.0.0.254\n }\n domain storify.com {\n     server 10.0.0.254\n }\n+domain test.lan {\n+    server 8.8.8.8\n+}\n domain thefacebook.com {\n     server 10.0.0.254\n }\n domain twimg.com {\n     server 10.0.0.254\n }\n domain twitter.com {\n     server 10.0.0.254\n }\n domain w3schools.com {\n     server 10.0.0.254\n }\n domain w.org {\n     server 10.0.0.254\n }\n domain x.lan {\n     server 10.30.0.1\n }\n domain ycombinator.com {\n     server 10.0.0.254\n }\n domain youtube.com {\n     server 10.0.0.254\n }\n listen-address 10.33.0.1\n listen-address 10.0.0.2\n system\n'

vyos@beijing:~$ config
[edit]
vyos@beijing# set service dns forwarding domain test.lan server 8.8.8.8
[edit]
vyos@beijing# commit
[edit]
vyos@beijing# exit
Warning: configuration changes have not been saved.
exit
vyos@beijing:~$ file /etc/powerdns/recursor.conf
/etc/powerdns/recursor.conf: ASCII text, with very long lines
vyos@beijing:~$ config
e[edit]
vyos@beijing# edit service dns forwarding
[edit service dns forwarding]
vyos@beijing# delet domain test.lan
[edit service dns forwarding]
vyos@beijing# commit
[ service dns forwarding ]
not exists

vyos@vyos:~$ show version
Version:          VyOS 1.2-rolling-201912080217
Built by:         autobuild@vyos.net
Built on:         Sun 08 Dec 2019 02:17 UTC
Build UUID:       b998c0a6-ccf9-47ca-a8f8-7cc561bc5528
Build Commit ID:  7b47b452ce86a9