[Bug 1331276] [NEW] Starting lxc container from libvirt disconnects host network

[Mark Kirkwood]

Public bug reported:

Starting an lxc container, defined via the XML below, results in the
host's eth0 getting disconnected. I see DHCP messages beng generated and
notice this process:

root      5640  0.0  0.0  10232  2416 ?        Ss   13:05   0:00
dhclient -1 -v -pf /run/dhclient.eth0.pid -lf
/var/lib/dhcp/dhclient.eth0.leases eth0

is created - in addition to the usual network manager one. When I try to
stop the container from virsh I get permission denied killing process
5640 (if I kill it myself, then I can stop the container).

Starting and stopping the container via lxc-start|stop does not
produceany unusual symptoms.

=== container definition ===
(root) $ cat lxc1.xml
<domain type='lxc'>
    <name>lxc1</name>
    <memory>327680</memory>
    <os>
        <type>exe</type>
        <init>/sbin/init</init>
    </os>
    <vcpu>1</vcpu>
    <clock offset='utc'/>
    <on_poweroff>destroy</on_poweroff>
    <on_reboot>restart</on_reboot>
    <on_crash>destroy</on_crash>
    <devices>
        <emulator>/usr/lib/libvirt/libvirt_lxc</emulator>
        <filesystem type='mount'>
            <source dir='/var/lib/lxc/lxc1/rootfs'/>
            <target dir='/'/>
        </filesystem>
        <interface type='network'>
            <source network='default'/>
        </interface>
     <console type='pty'/>
    </devices>
</domain>

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: libvirt-bin 1.2.2-0ubuntu13.1
ProcVersionSignature: Ubuntu 3.13.0-29.53-generic 3.13.11.2
Uname: Linux 3.13.0-29-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
Date: Wed Jun 18 13:43:01 2014
InstallationDate: Installed on 2014-03-17 (92 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140314)
ProcEnviron:
 LANGUAGE=en_NZ:en
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_NZ.UTF-8
 SHELL=/bin/bash
SourcePackage: libvirt
UpgradeStatus: No upgrade log present (probably fresh install)
modified.conffile..etc.libvirt.libvirtd.conf: [modified]
modified.conffile..etc.libvirt.qemu.conf: [modified]
modified.conffile..etc.libvirt.qemu.networks.default.xml: [modified]
mtime.conffile..etc.libvirt.libvirtd.conf: 2014-04-30T14:46:35.465205
mtime.conffile..etc.libvirt.qemu.conf: 2014-04-30T14:36:31.125221
mtime.conffile..etc.libvirt.qemu.networks.default.xml: 2014-06-18T12:59:02.877673

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


** Tags: amd64 apport-bug trusty

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https://bugs.launchpad.net/bugs/1331276

Title:
  Starting lxc container from libvirt disconnects host network

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