[Bug 1685628] Re: DNS domain search no longer works

[chrisisbd]

Yes, I have this problem in xubuntu 17.04.

getent hosts <name> works with unqualified names
systemd-resolve <name> works with unqualified names
host <name> doesn't work
dig <name> doesn't work

Adding 'search <domain>' to /etc/resolv.conf fixes the problem, so as a
workaround I have added this to /etc/resolvconf/resolv.conf.d/head.

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Title:
  DNS domain search no longer works

Status in systemd package in Ubuntu:
  Confirmed

Bug description:
  $ lsb_release -rd
  Description:	Ubuntu 17.04
  Release:	17.04
  $ apt-cache policy systemd
  systemd:
    Installed: 232-21ubuntu3
    Candidate: 232-21ubuntu3
    Version table:
   *** 232-21ubuntu3 500
          500 http://gb.archive.ubuntu.com/ubuntu zesty-updates/main amd64 Packages
          100 /var/lib/dpkg/status
       232-21ubuntu2 500
          500 http://gb.archive.ubuntu.com/ubuntu zesty/main amd64 Packages

  
  In network connections, I have manual IPv4 configuration as follows:

    DNS servers 172.17.207.1,172.17.207.18
    Search domains: anjou.terraraq.org.uk

  This seems to be reflect in systemd's configuration:

  $ systemd-resolve --status
  Global
            DNSSEC NTA: 10.in-addr.arpa
                        16.172.in-addr.arpa
                        168.192.in-addr.arpa
                        17.172.in-addr.arpa
                        18.172.in-addr.arpa
                        19.172.in-addr.arpa
                        20.172.in-addr.arpa
                        21.172.in-addr.arpa
                        22.172.in-addr.arpa
                        23.172.in-addr.arpa
                        24.172.in-addr.arpa
                        25.172.in-addr.arpa
                        26.172.in-addr.arpa
                        27.172.in-addr.arpa
                        28.172.in-addr.arpa
                        29.172.in-addr.arpa
                        30.172.in-addr.arpa
                        31.172.in-addr.arpa
                        corp
                        d.f.ip6.arpa
                        home
                        internal
                        intranet
                        lan
                        local
                        private
                        test

  Link 2 (eth0)
        Current Scopes: DNS LLMNR/IPv4 LLMNR/IPv6
         LLMNR setting: yes
  MulticastDNS setting: no
        DNSSEC setting: no
      DNSSEC supported: no
           DNS Servers: 172.17.207.1
                        172.17.207.18
            DNS Domain: anjou.terraraq.org.uk
  $ cat /etc/resolv.conf 
  # Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
  #     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
  # 127.0.0.53 is the systemd-resolved stub resolver.
  # run "systemd-resolve --status" to see details about the actual nameservers.

  nameserver 127.0.0.53

  However, lookups no longer honor the search domain:

  $ ping araminta
  ping: araminta: Name or service not known
  $ host araminta
  Host araminta not found: 2(SERVFAIL)

  $ ping -c1 araminta.anjou.terraraq.org.uk
  PING araminta.anjou.terraraq.org.uk (172.17.207.18) 56(84) bytes of data.
  64 bytes from araminta.anjou.terraraq.org.uk (172.17.207.18): icmp_seq=1 ttl=64 time=0.201 ms

  --- araminta.anjou.terraraq.org.uk ping statistics ---
  1 packets transmitted, 1 received, 0% packet loss, time 0ms
  rtt min/avg/max/mdev = 0.201/0.201/0.201/0.000 ms

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