[Bug 1628552] Re: on startup gateway & dns- options in /etc/network/interfaces are not always set

[just me]

yes i think all of them. the interface appears to always be configured
correctly. however, sometimes the default gateway is not set, other
times the dns- settings are not set, and still other times neither are
set.

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https://bugs.launchpad.net/bugs/1628552

Title:
  on startup gateway & dns- options in /etc/network/interfaces are not
  always set

Status in ifupdown package in Ubuntu:
  New
Status in resolvconf package in Ubuntu:
  New

Bug description:
  recently i have upgraded 4 VM-based systems to 16.04.1 LTS (Xenial
  Xerus). on startup, settings within /etc/network/interfaces do not
  appear to be taking effect reliably. specifically, the gateway and
  dns- settings have been problematic for me. on subsequent restarts,
  all or some of the settings take effect other times the gateway is set
  and the dns- options are not set. very problematic when the default
  gateway is not added to the routing table.

  the dns- settings were a bit easier to illustrate the issue. i added a
  comment to /etc/resolvconf/resolv.conf.d/base (# base) &
  etc/resolvconf/resolv.conf.d/tail (# tail).

  $ cat /etc/resolvconf/resolv.conf.d/*
  # base
  # 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
  # tail

  on startup on 1 of the systems showed this:
  $ 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
  # tail

  you can see the "# base" comment wasn't added.
  let me know if i can add anymore details or if this should be posted somewhere else.

  $ lsb_release -rd
  Description:    Ubuntu 16.04.1 LTS
  Release:        16.04

  $ apt-cache policy ifupdown
  ifupdown:
    Installed: 0.8.10ubuntu1.1
    Candidate: 0.8.10ubuntu1.1
    Version table:
   *** 0.8.10ubuntu1.1 500
          500 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages
          100 /var/lib/dpkg/status
       0.8.10ubuntu1 500
          500 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 Packages

  $ apt-cache policy resolvconf
  resolvconf:
    Installed: 1.78ubuntu2
    Candidate: 1.78ubuntu2
    Version table:
   *** 1.78ubuntu2 500
          500 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
          500 http://us.archive.ubuntu.com/ubuntu xenial/main i386 Packages
          100 /var/lib/dpkg/status

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