[Bug 1003656] Re: bridge-utils/vlan udev hooks prevent execution of upstart hook, slowing down boot

Launchpad Bug Tracker 1003656 at bugs.launchpad.net
Tue Sep 11 20:00:08 UTC 2012

This bug was fixed in the package bridge-utils - 1.5-4ubuntu2

bridge-utils (1.5-4ubuntu2) quantal; urgency=low

  * Revert last chance as udev doesn't accept that syntax.
  * Set BRIDGE_HOTPLUG=yes as that's the behaviour we had in the past and
    need for the event based networking. Reverting change from 1.5-4.
  * Don't call ifup from bridge-network-interface, instead just call brctl
    and let udev/upstart bring the interface up (LP: #1003656)
 -- Stephane Graber <stgraber at ubuntu.com>   Tue, 11 Sep 2012 10:45:45 -0400

** Changed in: bridge-utils (Ubuntu Quantal)
       Status: Triaged => Fix Released

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  bridge-utils/vlan udev hooks prevent execution of upstart hook,
  slowing down boot

Status in “bridge-utils” package in Ubuntu:
  Fix Released
Status in “vlan” package in Ubuntu:
Status in “bridge-utils” source package in Precise:
Status in “bridge-utils” source package in Quantal:
  Fix Released
Status in “vlan” source package in Quantal:

Bug description:
  we're trying to migrate our network configuration from lucid to
  precise.  in 10.04 we tied eth0+eth1 together into bond0, then set br0
  up on top of that and assigned an address via dhcp.  in 12.04 this
  only works if br0 is configured with a static ip address.  it fails
  when trying to use dhcp.  to simplify testing i've removed eth1 from
  the configuration (sanity checked against
  http://www.stgraber.org/2012/01/04/networking-in-ubuntu-12-04-lts/ ):

  auto lo
  iface lo inet loopback

  auto eth0
  iface eth0 inet manual
    bond-master bond0

  auto bond0
  iface bond0 inet manual
    bond-slaves none
    bond-mode 802.3ad
    bond-miimon 100

  auto br0
  iface br0 inet dhcp
    bridge_ports bond0 
    bridge_stp off

  the above results in a system w/o network connectivity.  the dhcp
  server reports requests from an unexpected mac addr (different each
  boot).  udevd logs "timeout 'bridge-network-interface'".  poking
  around a little before the timeout shows the following 2 groups of

    |-ifup,1361 --allow auto eth0
    |   `-sh,1363 -c run-parts  /etc/network/if-pre-up.d
    |       `-run-parts,1364 /etc/network/if-pre-up.d
    |           `-ifenslave,1392 /etc/network/if-pre-up.d/ifenslave
    |               `-sleep,2380 0.1

    |   |-udevd,599 --daemon
    |   |   `-bridge-network-,1429 /lib/udev/bridge-network-interface
    |   |       `-ifup,1457 --allow auto br0
    |   |           `-sh,1540 -c dhclient3 -e IF_METRIC=100 -pf /var/run/dhclient.br0.pid -lf /var/lib/dhcp/dhclient.br0.leases -1 br0
    |   |               `-dhclient3,1541 -e IF_METRIC=100 -pf /var/run/dhclient.br0.pid -lf /var/lib/dhcp/dhclient.br0.leases -1 br0

  the ifenslave appears to be looping over that `sleep` (testing for
  /run/network/ifenslave.bond0) until it is killed and the dhclient is
  making its request w/the unexpected mac addr (also reported in `ip
  link show br0`).  interestingly br0's mac addr matches that of eth0
  (as expected) once bridge-network-interface has timed out and been

  a workaround appears to be adding the line:
    pre-up /sbin/ifup --allow auto bond0
  to the "auto br0" stanza.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: bridge-utils 1.5-2ubuntu6
  ProcVersionSignature: Ubuntu 3.2.0-24.38-generic 3.2.16
  Uname: Linux 3.2.0-24-generic x86_64
  ApportVersion: 2.0.1-0ubuntu7
  Architecture: amd64
  Date: Wed May 23 13:44:43 2012
   PATH=(custom, user)
  SourcePackage: bridge-utils
  UpgradeStatus: No upgrade log present (probably fresh install)

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