[Bug 1013843] Re: resolv.conf empty when doing PXE installations

Daniel Manrique daniel.manrique at canonical.com
Mon Jun 18 14:33:48 UTC 2012


Hi Thomas,

A few of the files you requested weren't in /run, here's the output of
the commands you requested (I put them all in one script):

# bash script.sh 
total 4
-rw-r--r-- 1 root root   0 Jun 18 09:53 enable-updates
drwxr-xr-x 2 root root  40 Jun 18 09:53 interface
-rw-r--r-- 1 root root 151 Jun 18 09:53 resolv.conf
total 0
=== /run/resolvconf/interface/* ===
cat: /run/resolvconf/interface/*: No such file or directory
=== /etc/resolvconf/resolv.conf.d/base ===
=== /etc/resolvconf/resolv.conf.d/head ===
# 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
[main]
plugins=ifupdown,keyfile
dns=dnsmasq

[ifupdown]
managed=false
cat: /run/nm-dns-dnsmasq.conf: No such file or directory

The remaining file you requested /etc/resolv.conf has nothing but the
comment as seen in the original report:

# 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

Please let me know if you need more information about this problem.
Thanks!

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to resolvconf in Ubuntu.
https://bugs.launchpad.net/bugs/1013843

Title:
  resolv.conf empty when doing PXE installations

Status in “resolvconf” package in Ubuntu:
  New

Bug description:
  Quantal daily image as of 20110615.
  resolvconf 1.65ubuntu4.

  In our environment we do network installs via PXE booting. We noticed
  that name resolution wasn't working during the late_command phase
  (e.g. any apt-get install operations in the ubiquity/late_command
  fail).

  PXE passes IP information (including DNS) to the kernel, and in this
  case, the entry in /etc/network/interfaces is:

  auto eth0
  iface eth0 inet manual

  What we found is that, with this configuration, /etc/resolv.conf will
  be unconfigured (even though DHCP *did* send DNS information):

  # 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

  if I change the /etc/network/interfaces entry  to

  auto eth0
  iface eth0 inet dhcp

  then I run:

  sudo ifup --force eth0

  then /etc/resolv.conf is populated correctly and DNS resolution starts
  working.

  This would be a regression from Precise, where the resolv.conf file
  gets correctly populated even if the interface is set as manual.

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