Public bug reported:

I've got a netplan file:

# cat /etc/netplan/00-static-ip.yaml
# Let systemd-netword manage all devices on this system
network:
  version: 2
  renderer: networkd
  ethernets:
    enp3s0:
      dhcp4: no
      dhcp6: no
  bridges:
    br0:
      dhcp4: no
      dhcp6: no
      interfaces:
        - enp3s0
      addresses:
        - 192.168.1.122/24
      gateway4: 192.168.1.1
      nameservers:
        addresses:
          - 192.168.1.1

I can do a:

netplan generate
netplan apply

but this does not result in a configuration where my queries will be
resolved by my nameserver, which happens to be mikrotik router.
Instead, queries appear to be answered by the systemd-resolved on
localhost and it's unclear to me what nameserver that is using to
resolve queries, but I'm certain that it is not 192.168.1.1 because:

host mikrotik 192.168.1.1

will return:

Using domain server:
Name: 192.168.1.1
Address: 192.168.1.1#53
Aliases: 

mikrotik has address 192.168.1.1


while 

host mikrotik

will return

Host mikrotik not found: 2(SERVFAIL)

While I'm not 100% sure the root cause of this bug lies in the netplan
code-base vs. either systemd-resolved or one of the myriad other tools
which have complicated DNS resolution in recent years but, in practical
terms, the result is that netplan does not work like the documentation
suggests it should.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: netplan.io 0.36.3
ProcVersionSignature: Ubuntu 4.15.0-36.39-lowlatency 4.15.18
Uname: Linux 4.15.0-36-lowlatency x86_64
ApportVersion: 2.20.9-0ubuntu7.4
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Tue Oct 16 09:17:58 2018
InstallationDate: Installed on 2018-10-16 (0 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: netplan.io
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: netplan.io (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug bionic

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https://bugs.launchpad.net/bugs/1798107

Title:
  netplan render does not set DNS nameservers correctly

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