touch-packages team mailing list archive

[Stéphane Graber <stgraber@xxxxxxxxxxxx>]

Not sure I like this approach. An init script should never change a
system config, so this is a packaging policy violation...

To be fair, anything we come up with which picks a random/unused subnet
will still break users who may have this subnet in use behind a router,
so that's not really an option either.

For wily, I'd say we simply turn lxc-net off completely. That will add
an extra step for any user who wants to use LXD, but it will also
guarantee we don't regress anyone in the process.

Doing so would require the CPC team to update /etc/default/lxc-net,
setting USE_LXC_BRIDGE to false.

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https://bugs.launchpad.net/bugs/1509414

Title:
  lxc postinst script checks available interfaces, can choose

Status in lxc package in Ubuntu:
  Confirmed

Bug description:
  [Problem]
  The released wily image preinstalls lxc, which breaks the assumption that lxc's preinst packaging script makes:

  It inspects the network to try to pick a 10.0.N.0 network that isn't
  being used, with N starting at 3, so this appears to have picked
  10.0.3.0 when it was installed on whatever system was generating the
  image. This conflicts with the network that eth0 gets attached to when
  the image is brought up in a container, because it gets attached to
  the host's lxcbr0, which is using 10.0.3.x.

  This affects LXC, and should affect LXD but doesn't currently, as the metadata used for lxd images is still pointing to a beta2 release.
  The easiest way to reproduce this is to use the ubuntu-cloud lxc template on a wily host:

  [Test Case]

  sudo lxc-create -t ubuntu-cloud -n wily
  sudo lxc-start -n wily
  sudo lxc-attach -n wily
  # inside container, test connectivity, eg:
  apt-get update

  [Regression Potentional]
  Currently none as networking didn't work initially.

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