[Bug 1714308] Re: dns does not work in initramfs after configure_networking

[Scott Moser]

** Merge proposal linked:
   https://code.launchpad.net/~smoser/ubuntu/+source/initramfs-tools/+git/initramfs-tools/+merge/341203

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https://bugs.launchpad.net/bugs/1714308

Title:
  dns does not work in initramfs after configure_networking

Status in initramfs-tools package in Ubuntu:
  Fix Released
Status in initramfs-tools source package in Xenial:
  Confirmed
Status in initramfs-tools source package in Zesty:
  Confirmed

Bug description:
  in an initramfs built with mkinitramfs-tools that has been booted with
  'ip=' and a dhcp server responded in the dhcp request, you would
  expect dns to work.

  currently it does not.
  at least part of the issue is that libnss_dns.so is missing.

  ProblemType: Bug
  DistroRelease: Ubuntu 17.10
  Package: initramfs-tools 0.125ubuntu9
  ProcVersionSignature: User Name 4.12.0-11.12-generic 4.12.5
  Uname: Linux 4.12.0-11-generic x86_64
  ApportVersion: 2.20.7-0ubuntu1
  Architecture: amd64
  Date: Thu Aug 31 16:43:05 2017
  Ec2AMI: ami-000000e4
  Ec2AMIManifest: FIXME
  Ec2AvailabilityZone: nova
  Ec2InstanceType: m1.small
  Ec2Kernel: unavailable
  Ec2Ramdisk: unavailable
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: initramfs-tools
  UpgradeStatus: No upgrade log present (probably fresh install)

  Related bugs:
   * bug 1698181: Switch to netplan renderer in Artful
   * bug 1714028: artful network vmtests fail now that ifdown command is removed

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