[Bug 928524] Re: lxcbr0 fails to come up when dnsmasq is installed

[Serge Hallyn]

** Description changed:

  ============ SRU justification ===========
  Impact: lxc (by way of lxc-net) fails to start when dnsmasq is installed
  Development fix: install a dnsmasq.d file to prevent the system-wide dnsmasq
  from binding to lxcbr0
  Stable fix: same as Development fix
  Test case:
- 	sudo apt-get purge lxc
- 	sudo apt-get -y install dnsmasq
- 	sudo apt-get -y install lxc
+  sudo apt-get purge lxc
+  sudo apt-get -y install dnsmasq
+  sudo apt-get -y install lxc
  Regression potential: There should be none, since we are simply telling the
  system-wide dnsmasq (if any) not to bind to the lxcbr0 which our own dnsmasq
  instance will bind to.
  ==========================================
  
  If dnsmasq is installed and running as default, it will bind all
  interfaces.  As a result lxc can't run dnsmasq against lxcbr0 (and same
  with libvirt and virbr0).
  
  At the least this should be documented in lxc.  Preferably we'd find a
  way to have dnsmasq be less of a bully.

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https://bugs.launchpad.net/bugs/928524

Title:
  lxcbr0 fails to come up when dnsmasq is installed

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