[Bug 1472369] [NEW] lxcbr0 missing after starting lxc-net.service

[Ryan Harper]

Public bug reported:

1. % lsb_release -rd 
Description:	Ubuntu Wily Werewolf (development branch)
Release:	15.10

2. % apt-cache policy lxc
lxc:
  Installed: 1.1.2-0ubuntu3
  Candidate: 1.1.2-0ubuntu3
  Version table:
 *** 1.1.2-0ubuntu3 0
        500 http://us.archive.ubuntu.com/ubuntu/ wily/main amd64 Packages
        100 /var/lib/dpkg/status

3.  sudo systemctl restart lxc-net.service should bring up lxcbr0 bridge
device

4. lxcbr0 device is not present after starting/restarting lxc-
net.service

(kriek) ~ % sudo systemctl restart lxc-net.service
(kriek) ~ % sudo systemctl status -l lxc-net.service
● lxc-net.service - LXC network bridge setup
   Loaded: loaded (/lib/systemd/system/lxc-net.service; enabled; vendor preset: enabled)
   Active: active (exited) since Tue 2015-07-07 13:33:15 CDT; 3s ago
  Process: 1764 ExecStop=/usr/lib/x86_64-linux-gnu/lxc/lxc-net stop (code=exited, status=0/SUCCESS)
  Process: 1769 ExecStart=/usr/lib/x86_64-linux-gnu/lxc/lxc-net start (code=exited, status=0/SUCCESS)
 Main PID: 1769 (code=exited, status=0/SUCCESS)

Jul 07 13:33:15 kriek systemd[1]: Starting LXC network bridge setup...
Jul 07 13:33:15 kriek lxc-net[1769]: dnsmasq: cannot read /etc/dnsmasq.conf: No such file or directory
Jul 07 13:33:15 kriek systemd[1]: Started LXC network bridge setup.
(kriek) ~ % brctl show
bridge name	bridge id		STP enabled	interfaces
virbr0		8000.5254005821b0	yes		virbr0-nic
(kriek) ~ % ifconfig lxcbr0
lxcbr0: error fetching interface information: Device not found

My wily system does not have a dnsmasq.conf  and without one which includes the conf-dir = /etc/dnsmasq.d
directive, then lxc-net does not come up.

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: lxc 1.1.2-0ubuntu3
ProcVersionSignature: Ubuntu 4.0.0-4.6-generic 4.0.7
Uname: Linux 4.0.0-4-generic x86_64
ApportVersion: 2.17.3-0ubuntu4
Architecture: amd64
Date: Tue Jul  7 13:35:41 2015
InstallationDate: Installed on 2015-05-10 (57 days ago)
InstallationMedia: Ubuntu-Server 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.3)
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: lxc
UpgradeStatus: No upgrade log present (probably fresh install)
defaults.conf:
 lxc.network.type = veth
 lxc.network.link = lxcbr0
 lxc.network.flags = up
 lxc.network.hwaddr = 00:16:3e:xx:xx:xx

** Affects: lxc (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug wily

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https://bugs.launchpad.net/bugs/1472369

Title:
  lxcbr0 missing after starting lxc-net.service

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