Public bug reported:
This is similar to #961089 and may well be a duplicate, but I believe
that there's a distinction since NM is disabling a bridge that's been
created automatically by virt-manager, and so the explanation that it's
not a normal way of configuring bridges doesn't (or at least shouldn't)
apply.
Basically, what I've done is:
1) Install virt-manager
2) Create some VMs
3) Leave my machine on for a while
4) Notice that the bridge disappears and none of the machines can speak to the
host (or get DHCP leases).
I noticed this earlier today, and so added the mac address of the bridge
to Network Manager's config, but it appears to have ignored this, too:
root@amazing:/home/avi# tail -n1 /etc/NetworkManager/NetworkManager.conf
unmanaged-devices=mac:fe:54:00:43:19:37
root@amazing:/home/avi# ifconfig virbr0
virbr0 Link encap:Ethernet HWaddr fe:54:00:43:19:37
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1723 errors:0 dropped:0 overruns:0 frame:0
TX packets:2140 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:200990 (200.9 KB) TX bytes:1822872 (1.8 MB)
root@amazing:/home/avi#
I see this in syslog at about the same time (grepping for virbr0):
Jan 15 17:50:13 amazing NetworkManager[1261]: <info> (virbr0): now managed
Jan 15 17:50:13 amazing NetworkManager[1261]: <info> (virbr0): device state
change: unmanaged -> unavailable (reason 'managed') [10 20 2]
Jan 15 17:50:13 amazing NetworkManager[1261]: <info> (virbr0): bringing up
device.
Jan 15 17:50:13 amazing avahi-daemon[652]: Joining mDNS multicast group on
interface virbr0.IPv4 with address 192.168.122.1.
Jan 15 17:50:13 amazing avahi-daemon[652]: New relevant interface virbr0.IPv4
for mDNS.
Jan 15 17:50:13 amazing avahi-daemon[652]: Registering new address record for
192.168.122.1 on virbr0.IPv4.
Jan 15 17:50:13 amazing NetworkManager[1261]: <info> (virbr0): carrier now ON
(device state 20)
Jan 15 17:50:13 amazing NetworkManager[1261]: <info> (virbr0): deactivating
device (reason 'managed') [2]
Jan 15 17:50:13 amazing avahi-daemon[652]: Withdrawing address record for
192.168.122.1 on virbr0.
Jan 15 17:50:13 amazing avahi-daemon[652]: Leaving mDNS multicast group on
interface virbr0.IPv4 with address 192.168.122.1.
Jan 15 17:50:13 amazing avahi-daemon[652]: Interface virbr0.IPv4 no longer
relevant for mDNS.
Jan 15 17:50:13 amazing NetworkManager[1261]: <info> (virbr0): device state
change: unavailable -> disconnected (reason 'none') [20 30 0]
Jan 15 17:50:17 amazing dnsmasq-dhcp[1932]: DHCP packet received on virbr0
which has no address
Jan 15 17:50:19 amazing dnsmasq-dhcp[1932]: DHCP packet received on virbr0
which has no address
Jan 15 17:50:26 amazing dnsmasq-dhcp[1932]: DHCP packet received on virbr0
which has no address
Jan 15 17:50:27 amazing dnsmasq-dhcp[1932]: DHCP packet received on virbr0
which has no address
ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: network-manager 0.9.6.0+git201301021750.e78c3e8-0ubuntu1
ProcVersionSignature: Ubuntu 3.7.0-7.15-generic 3.7.0
Uname: Linux 3.7.0-7-generic x86_64
ApportVersion: 2.7-0ubuntu2
Architecture: amd64
Date: Tue Jan 15 17:57:47 2013
EcryptfsInUse: Yes
IfupdownConfig:
auto lo
iface lo inet loopback
InstallationDate: Installed on 2012-09-10 (127 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120910)
IpRoute:
default via 192.168.1.254 dev wlan0 proto static
169.254.0.0/16 dev wlan0 scope link metric 1000
192.168.1.0/24 dev wlan0 proto kernel scope link src 192.168.1.67 metric 9
MarkForUpload: True
NetworkManager.state:
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
WimaxEnabled=true
SourcePackage: network-manager
UpgradeStatus: Upgraded to raring on 2012-11-26 (50 days ago)
mtime.conffile..etc.NetworkManager.NetworkManager.conf:
2013-01-15T16:36:47.133697
nmcli-dev:
DEVICE TYPE STATE DBUS-PATH
virbr0 bridge disconnected
/org/freedesktop/NetworkManager/Devices/2
wlan0 802-11-wireless connected
/org/freedesktop/NetworkManager/Devices/1
eth0 802-3-ethernet unavailable
/org/freedesktop/NetworkManager/Devices/0
nmcli-nm:
RUNNING VERSION STATE NET-ENABLED WIFI-HARDWARE WIFI
WWAN-HARDWARE WWAN
running 0.9.7.0 connected enabled enabled
enabled enabled enabled
** Affects: network-manager (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug raring running-unity
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https://bugs.launchpad.net/bugs/1099949
Title:
Disables virtual machine manager's virbr0
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