[Bug 1751797] Re: dns resolution only works for domains in 'search'.

[Scott Moser]

$ systemd-resolve --status enp0s25
Link 2 (enp0s25)
      Current Scopes: DNS
       LLMNR setting: yes
MulticastDNS setting: no
      DNSSEC setting: no
    DNSSEC supported: no
         DNS Servers: 10.7.0.1
                      fdfd:dddd:dddd::1
          DNS Domain: ~mydomain.com

$ cat /var/lib/NetworkManager/dhclient-72c7fac3-c017-4b76-9954-b4fb08262376-enp0s25.lease 
lease {
  interface "enp0s25";
  fixed-address 10.7.2.103;
  filename "pxelinux.0";
  option subnet-mask 255.255.0.0;
  option dhcp-lease-time 43200;
  option routers 10.7.0.1;
  option dhcp-message-type 5;
  option dhcp-server-identifier 10.7.0.1;
  option domain-name-servers 10.7.0.1;
  option dhcp-renewal-time 21600;
  option dhcp-rebinding-time 37800;
  option broadcast-address 10.7.255.255;
  option host-name "milhouse-eth0";
  option domain-name "mydomain.com";
  renew 4 2018/03/15 18:51:36;
  rebind 4 2018/03/15 23:41:37;
  expire 5 2018/03/16 01:11:37;
}
lease {
  interface "enp0s25";
  fixed-address 10.7.2.103;
  filename "pxelinux.0";
  option subnet-mask 255.255.0.0;
  option routers 10.7.0.1;
  option dhcp-lease-time 43200;
  option dhcp-message-type 5;
  option domain-name-servers 10.7.0.1;
  option dhcp-server-identifier 10.7.0.1;
  option dhcp-renewal-time 21600;
  option broadcast-address 10.7.255.255;
  option dhcp-rebinding-time 37800;
  option host-name "milhouse-eth0";
  option domain-name "mydomain.com";
  renew 4 2018/03/15 18:19:57;
  rebind 4 2018/03/15 23:48:56;
  expire 5 2018/03/16 01:18:56;
}

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https://bugs.launchpad.net/bugs/1751797

Title:
  dns resolution only works for domains in 'search'.

Status in network-manager package in Ubuntu:
  New
Status in systemd package in Ubuntu:
  Confirmed

Bug description:
  After reboot, dns was broken.
  This is a very simple Network Manager managed interface that has dhcp.

  $ nmcli device show enp0s25  | pastebinit
  http://paste.ubuntu.com/p/sMVTdrMBxJ/

  
  I've attached systemd-resolve --status output.

  In order to file the bug I just modified /etc/resolv.conf to put the
  dns server in directly.

  Other information, it seems like it just will only look for dns under
  my search domains from the dhcp server:

  $ systemd-resolve home.mosers.us
  home.mosers.us: 23.28.108.176

  -- Information acquired via protocol DNS in 1.5ms.
  -- Data is authenticated: no

  $ systemd-resolve google.com
  google.com: resolve call failed: No appropriate name servers or networks for name found

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: systemd 237-3ubuntu3
  ProcVersionSignature: Ubuntu 4.13.0-32.35-generic 4.13.13
  Uname: Linux 4.13.0-32-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
  ApportVersion: 2.20.8-0ubuntu10
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Mon Feb 26 09:35:32 2018
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2015-07-23 (949 days ago)
  InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20150722.1)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-32-generic root=UUID=f897b32a-eacf-4191-9717-844918947069 ro quiet splash vt.handoff=1
  SourcePackage: systemd
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.vendor: Intel Corporation

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