[Bug 1000244] Re: Symlink /etc/resolv.conf does not exist after installation or upgrade of resolvconf -- various causes

Thu Jan 3 01:53:58 UTC 2013

Could you please add some quick clarifications for this Thomas? Might be
good for all users.

1) The message (as of today’s dist-upgrade) still shows critical error -
while I understand it is an warning. Many threads discuss this problem.
Is this correct, is dist-upgrade related problems in this case a
Critical Error or is it a Warning?

2) On ubuntu cloud clones (e.g., amazon elastic builds) will this break
any resolvconf functionality not intended by the clone
administrator/creator. I.e., the person(s) hard-coding the
/etc/resolv.conf file (not symlink) with information, or will it
continue to work without properly (defaulting to prior 12.04 config
files etc).

3) The resolveconf system is often bundled with kernel updates. If I
accept this Error as a Warning and see broken updates in apt, will I
then be able to update to later kernels?

4) added as "fix released" in some related bugs (incomplete here) while
upgrade process from version x to y (distributions) are likely to
produce these errors - this is incorrect.

Note: I specifically need kernel updates to nfs servers and it has
dependencies on resolvconf in the update packages (from what I can
understand from apt-get -s).

INFO:

1) uname -a
Linux ip-10-39-8-203 3.2.0-35-virtual #55-Ubuntu SMP Wed Dec 5 18:02:05 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

2) sudo dpkg-reconfigure DOES NOT WORK or chattr (all with many reboots)

3) cannot set immutable bit easily (standard amazon elastic clone).
However, with hacks from https://bugs.launchpad.net/ubuntu/+bug/1003595
I can make it use a symlink. Still dist-upgrade and dpkg reconf. process
fails with error.

4) nr 3 hacks works despite output (symlink present after reboot with
same info as before adding symling):

# 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
nameserver 172.16.0.23
search eu-west-1.compute.internal

5) ls -l /etc/resolv.conf
lrwxrwxrwx 1 root root 29 Jun 16  2012 /etc/resolv.conf -> ../run/resolvconf/resolv.conf

related:

https://bugs.launchpad.net/ubuntu/+source/resolvconf/+bug/1000244
https://bugs.launchpad.net/ubuntu/+bug/1003595

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https://bugs.launchpad.net/bugs/1000244

Title:
  Symlink /etc/resolv.conf does not exist after installation or upgrade
  of resolvconf -- various causes

Status in “resolvconf” package in Ubuntu:
  Incomplete

Bug description:
  I upgraded an 11.10 install to 12.04, and now I'm unable to resolve
  domain names because Network Manager does not populate my
  /etc/resolv.conf file.

  For example, my local wireless router uses the domain "mylocaldomain"
  and nameservers 10.157.10.12 and 10.157.10.14, so in 11.10, after
  connecting to the router I would see this in my /etc/resolv.conf:

  domain mylocaldomain
  search mylocaldomain
  nameserver 10.157.10.12
  nameserver 10.157.10.14

  Now /etc/resolv.conf contains the settings last set before I upgraded
  to 12.04, and doesn't update them for whatever network I'm currently
  on. I have to manually guess the settings and modify /etc/resolv.conf
  in order to resolve domain names.

  I believe this may be related to
  https://bugs.launchpad.net/ubuntu/+source/resolvconf/+bug/922677 and
  how the "resolvconf" program has been introduce to manage this. I
  believe this is a new bug with how prior installs are improperly
  upgraded.

  I tried removing the line "dns=dnsmasq" from
  /etc/NetworkManager/NetworkManager.conf and then running `sudo restart
  network-manager`, but that had no effect.

  I tried running `resolvconf --enable-updates` but I get the error
  "resolvconf: Error: /etc/resolv.conf isn't a symlink, not doing
  anything."

  Based on https://help.ubuntu.com/12.04/serverguide/network-
  configuration.html#name-resolution, I tried establishing this symlink
  myself, but the file /run/resolvconf/resolv.conf does not exist on my
  system.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: network-manager 0.9.4.0-0ubuntu4
  ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14
  Uname: Linux 3.2.0-24-generic x86_64
  NonfreeKernelModules: nvidia wl
  ApportVersion: 2.0.1-0ubuntu7
  Architecture: amd64
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
  Date: Wed May 16 09:57:25 2012
  IfupdownConfig:
   auto lo
   iface lo inet loopback
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64+mac (20111012)
  IpRoute:
   default via 192.168.1.1 dev eth2  proto static 
   169.254.0.0/16 dev eth2  scope link  metric 1000 
   192.168.1.0/24 dev eth2  proto kernel  scope link  src 192.168.1.205  metric 2 
   192.168.122.0/24 dev virbr0  proto kernel  scope link  src 192.168.122.1
  NetworkManager.state:
   [main]
   NetworkingEnabled=true
   WirelessEnabled=true
   WWANEnabled=true
   WimaxEnabled=true
  SourcePackage: network-manager
  UpgradeStatus: Upgraded to precise on 2012-05-10 (5 days ago)
  nmcli-dev:
   DEVICE     TYPE              STATE         DBUS-PATH                                  
   eth2       802-11-wireless   connected     /org/freedesktop/NetworkManager/Devices/1  
   eth0       802-3-ethernet    unavailable   /org/freedesktop/NetworkManager/Devices/0
  nmcli-nm:
   RUNNING         VERSION    STATE           NET-ENABLED   WIFI-HARDWARE   WIFI       WWAN-HARDWARE   WWAN      
   running         0.9.4.0    connected       enabled       enabled         enabled    enabled         enabled

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