[Bug 955785] Re: dnsmasq and resolvconf

[Thomas Hood]

Marco in #1> don't use base, that as far as I've understand is used only
if nothing else is available.

Asmo in #2> thank you... tail is the file for added info about dns
servers

It sounds as if both of you are a little bit confused about the use of
these files.  Please read resolvconf(8).

Addresses from "base" don't appear in resolv.conf if one of the
available nameservers is at 127.0.0.1.  It's the presence of address
127.0.0.1 that explains why 8.8.8.8 and 8.8.4.4 were not listed in
/etc/resolv.conf.

For interfaces brought up with ifup(8), /etc/network/interfaces is the
right place for nameserver information, not the "base" or "tail" files.

The configuration originally posted by Asmo was only incorrect insofar
as nameserver addresses were unnecessarily present in "base".  It would
have sufficed to put those addresses only in /etc/network/interfaces.

The presence of 127.0.0.1 in Asmo's resolv.conf indicates that dnsmasq
had been started and had registered its address with resolvconf.
Resolvconf should have sent the addresses 8.8.8.8 and 8.8.4.4 to dnsmasq
so that dnsmasq could use them as the addresses to forward queries to.

That this did not occur indicates that either dnsmasq was not running or
that some other abnormal condition existed.

Asmo: Can you reproduce the problem?  Please delete the base and tail
files, restore the dns-nameservers line in /etc/network/interfaces to
how it was when you submitted this report, see if name resolution works
(yay -- report this) or is broken, in which case please send the
contents of /etc/resolv.conf and /var/run/dnsmasq/resolv.conf and the
output from "ps -elf | grep dnsmasq".

I am assuming that you are not using NetworkManager.  Please send the
output of "dpkg -l network-manager" and "ps -elf | grep -i
networkmanager" so we can be sure.

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https://bugs.launchpad.net/bugs/955785

Title:
  dnsmasq and resolvconf

Status in “ltsp” package in Ubuntu:
  Incomplete

Bug description:
  This is updated Ubuntu 12.04.

  I use ltsp-server-package, not ltsp-server-standalone.

  I have installed dnsmasq and followed this howtos:

  https://help.ubuntu.com/community/UbuntuLTSP/ProxyDHCP
  http://www.stgraber.org/2012/02/24/dns-in-ubuntu-12-04/
  http://wiki.debian.org/NetworkConfiguration#The_resolvconf_program

  
  Thin client boots very nicely, but there are no dns services:

  root at lubuntu:~# 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
  nameserver 127.0.0.1

  
  I use one nic:

  root at lubuntu:~# cat /etc/network/interfaces
  # This file describes the network interfaces available on your system
  # and how to activate them. For more information, see interfaces(5).

  # The loopback network interface
  auto lo
  iface lo inet loopback

  # The primary network interface
  auto eth0
  iface eth0 inet static
  	address 192.168.100.10
  	netmask 255.255.255.0
  	network 192.168.100.0
  	broadcast 192.168.100.255
  	gateway 192.168.100.1
  	dns-nameservers 8.8.8.8 8.8.4.4

  
  I can ping, but not with domain names:

  root at lubuntu:~# ping 8.8.8.8
  PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
  64 bytes from 8.8.8.8: icmp_req=1 ttl=43 time=51.2 ms

  root at lubuntu:~# ping google.com
  ping: unknown host google.com

  
  My base is filled:

  root at lubuntu:~# cat /etc/resolvconf/resolv.conf.d/base
  nameserver 8.8.8.8
  nameserver 8.8.4.4

  
  How I make dns works in ltsp server with dnsmasq? I do not want go back 
  to use two nics and ltsp-server-standalone.

  root at lubuntu:~# dpkg -l | grep dnsmasq
  ii  dnsmasq                            2.59-4 
               Small caching DNS proxy and DHCP/TFTP server
  ii  dnsmasq-base                       2.59-4 
               Small caching DNS proxy and DHCP/TFTP server
  root at lubuntu:~# dpkg -l | grep resolvconf
  ii  resolvconf                         1.63ubuntu9 
               name server information handler

  
  Best Regards Asmo Koskinen.

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