Just a brief comment for who's going to read this discussion: this was
happening with bond interfaces as well, not only bridges. Everything
that's not physical seemed to be affected.
Cheers!
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This bug was fixed in the package libvirt - 0.7.5-5ubuntu27.11
---
libvirt (0.7.5-5ubuntu27.11) lucid-proposed; urgency=low
* add debian/patches/fix-tap-interfaces-mac-addrs.patch to prevent
network freezes due to badly chosen tap interface macaddrs.
(LP: #584048)
-- Serge
** Tags added: verification-done
** Tags removed: verification-needed
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https://bugs.launchpad.net/bugs/584048
Title:
kvm images losing connectivity w/bridged network
I've installed the libvirt package in lucid-proposed and this issue
hasn't reoccurred for me! Very happy user here. :)
Right after installation it did happen again though, but I forgot to do
'service libvirt-bin restart'. After that I've started/stopped VMs more
than 20 times, all running smooth.
Accepted libvirt into lucid-proposed, the package will build now and be
available in a few hours. Please test and give feedback here. See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to
enable and use -proposed. Thank you in advance!
** Changed in: libvirt (Ubuntu Lucid)
** Package changed: qemu-kvm (Ubuntu) => libvirt (Ubuntu)
** Changed in: libvirt (Ubuntu)
Status: Invalid => Fix Released
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Quoting Derek Simkowiak (ubu...@cool-st.com):
> I have the same 4-second bridge freeze when using LXC containers and
> lxc-start or lxc-stop. (I am using a custom script to create my LXC
> containers.) I saw the reference to this above:
>
> https://www.redhat.com/archives/libvir-list/2010-July/m
I have the same 4-second bridge freeze when using LXC containers and
lxc-start or lxc-stop. (I am using a custom script to create my LXC
containers.) I saw the reference to this above:
https://www.redhat.com/archives/libvir-list/2010-July/msg00450.html
I changed my custom script from this:
MAC
** Changed in: qemu-kvm (Ubuntu Lucid)
Status: Incomplete => In Progress
** Changed in: qemu-kvm (Ubuntu Lucid)
Importance: Undecided => High
** Changed in: qemu-kvm (Ubuntu Lucid)
Assignee: (unassigned) => Serge Hallyn (serge-hallyn)
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** Branch linked: lp:~serge-hallyn/ubuntu/lucid/libvirt/fix-macaddr
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https://bugs.launchpad.net/bugs/584048
Title:
kvm images losing connectivity w/bridged network
-
** Description changed:
Binary package hint: kvm
=
SRU justification:
1. Impact: Networking can freeze for a while when VMs are started or stopped.
- 2. How addressed: a patch was cherry-picked from upstream, which makes sure
to assign the libvirt br
** Description changed:
Binary package hint: kvm
+
+ =
+ SRU justification:
+ 1. Impact: Networking can freeze for a while when VMs are started or stopped.
+ 2. How addressed: a patch was cherry-picked from upstream, which makes sure
to assign the libvirt br
Hi Trevor,
thanks for commenting.
The package he was testing is at https://launchpad.net/~serge-
hallyn/+archive/libvirt-fix-macaddr.
This bug seems to have slipped through the cracks! I'm going to
reassign this bug to libvirt and proceed with the SRU.
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I know this is a old bug but I experiencing the same issue. I am running
Ubuntu 10.04.2 LTS 64 bit server and can't seem to find angriukas fix
for libvirt. Perhaps I am not looking hard enough any help would be
appreciated.
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@angriukas
thanks, could you please open a new bug against libvirt in lucid,
detailing your precise symptoms with a pointer back to this bug? Then I
can use that bug to request an SRU to get the fix into lucid.
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@Serge Hallyn
Sorry for big delay, just installed libvirt-fix-macaddr to our production
system.
No more network interrupts was observed on guest start/shutdown.
Thank you for fix.
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@Serge The outages appear random. I suspect the outage is related to bug
#633392, while the double broadcast packets must be a vlan bug. I'm
adding my findings to bug #633392.
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You received this bug notifica
I have not had the opportunity to test multiple guests on the Maverick
host since I've had quite a few problems with it.
Right now it seems like the problem I'm seeing is related to a vlan bug
very similar to the one reported in bug #658460. The outages appear
random but it looks like it occurs wh
Quoting Tais Plougmann Hansen (584...@bugs.launchpad.net):
> I've traced the double packets to be a vlan issue and as such is not
> related to this error.
>
> That leaves me with a kvm guest experiencing periodical outages on a
> Maverick host with no apparent differences compared to a Lucid host.
I've traced the double packets to be a vlan issue and as such is not
related to this error.
That leaves me with a kvm guest experiencing periodical outages on a
Maverick host with no apparent differences compared to a Lucid host.
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kvm images losing connectivity w/bridged network
https://bugs.l
Hi Tais,
could you take a look at bug #673705? I think that one is the same problem
you are having. I don't want to connect it to this bug because this one got too
mired down in similar-but-not-identical bugs.
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kvm images losing connectivity w/bridged network
https://bugs.launchpad.net/bugs/
I think I have this problem (or the problem at #633392) with a guest
running on a Maverick kvm host. But only on Maverick. I'm not seeing it
on any of the Lucid hosts.
The only peculiar difference I've found between the two hosts is that
tcpdumping the bridge shows double externally broadcasted pa
Traced the problem to mal-functioning server motherboard. Replacement of
motherboard fixed several errors reported in the logs. Yet monitoring
closely.
** Changed in: opensuse
Status: New => Invalid
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Serge: I opened the new bug report as you requested, here:
https://bugs.launchpad.net/ubuntu/+source/qemu-kvm/+bug/633392
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Yup, thanks for the link, Sergey. I don't know that this is a dup of that, but
I
suspect that it is likewise a kernel bug and not a kvm one.
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You received this bug notification because you are a member of
(Marking this invalid for Maverick until someone can confirm that they have the
same problem as Billy has on Maverick)
** Changed in: qemu-kvm (Ubuntu Lucid)
Status: New => Incomplete
** Changed in: qemu-kvm (Ubuntu Maverick)
Status: Fix Committed => Invalid
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kvm images losing
FYI, there is yet another way (or two) to lose connectivity to KVM VM --
bug 579276
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** Also affects: qemu-kvm (Ubuntu Lucid)
Importance: Undecided
Status: New
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I'm looking over the history of this particular bug, and there at least
3 or 4 different bugs represented here. We should have been stricter
from the start about filing separate bugs.
@Billy Charlton
Can you tell us whether you are still having a problem? Yours appears
likely to be a bug in the
Serge,
No dice; the same problem occurs.
Curiously, running the /etc/netstart script in OpenBSD works to restore
connectivity, which fails again after a bit.
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Serge,
I'm testing the new packages now, I'll let you know what I find.
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(ok, i give - can't seem to find a way to track this separately for Lucid and
older
versus maverick)
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The patch which I'm waiting on Santi or Andrew to test is in the
libvirt package in Maverick, so setting the status appropriately
(I hope) there to 'Fix Released'.
** Changed in: qemu-kvm (Ubuntu Maverick)
Status: Triaged => Fix Released
** Changed in: qemu-kvm (Ubuntu Maverick)
Sta
** Tags added: server-mrs
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** Also affects: opensuse
Importance: Undecided
Status: New
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@Serge: I reported the bug, you can find it in: #626662
Frank
2010/8/27 Serge Hallyn <584...@bugs.launchpad.net>:
> Thanks, Frank. Would you mind opening a separate bug about your issue,
> summarizing your network topology, how you start the VMs (the libvirt xml
> or kvm command line or both),
I'll go ahead and test the package when I have a minute here; I've
multiple other servers that need attention.
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Thanks, Frank. Would you mind opening a separate bug about your issue,
summarizing your network topology, how you start the VMs (the libvirt xml
or kvm command line or both), and at what point you lose connectivity?
Can Santi or Andrew (or Billy, the original poster) test the proposed
package?
-
Hi Serge,
Thanks for your time!
The problem is not with the mac addresses (at least not for me). As I reported
earlier:
> For me, these are not related, because I'm not modifying the bridge
> when the connectivity is lost. As long as there is steady network
> trafic (for example a ping every min
I'm still waiting for the build system to get around to building these, but I've
uploaded packages with the proposed fix to ppa:serge-hallyn/libvirt-fix-macaddr
for lucid and hardy. Santi, Frank, or Andrew, can any of you test with this
package and see if it solves the problem for you?
--
kvm im
** Also affects: qemu-kvm (Fedora) via
https://bugzilla.redhat.com/show_bug.cgi?id=571991
Importance: Unknown
Status: Unknown
** Changed in: qemu-kvm (Ubuntu)
Status: Confirmed => Triaged
** Also affects: qemu-kvm (Ubuntu Maverick)
Importance: High
Assignee: Serge Hall
I think I'm having the same debilitating problem. Especially after
adding a fourth and fifth VM, packet loss would increase over time,
until the host and guests would become completely unreachable. I've
added keep-alive pings to all guests and the host, which seems to be
helping. Still, hasn't got
Oh, btw, Serge: I'm not using anything like wicd or networkmanager, this
is on a server.
** Changed in: qemu-kvm (Ubuntu)
Status: Incomplete => Confirmed
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You received this bug notification because y
Any updates on this? I still have this problem, running 2 LTS releases,
Hardy as host and Lucid as guest, both simple server installs, with KVM,
virtio, tap devices and a bridge...
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You received this bug not
Quoting Paolo Maero (fabric...@gmail.com):
> I verified that my problem is the same of RedHat bug 571991 and I am
> losing connectivity because of the bridge change its MAC address.
Thanks, Paolo, so then launchpad bug # 579892 is the one you want.
It looks like a fix was *just* sent upstream. Sh
I verified that my problem is the same of RedHat bug 571991 and I am
losing connectivity because of the bridge change its MAC address.
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S
I am also not modifying the bridge at all.
Where my problem differs from Frank's, however, is my connectivity is
lost even if there is steady network traffic to or from the guest.
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You received this bug not
For me, these are not related, because I'm not modifying the bridge
when the connectivity is lost. As long as there is steady network
trafic (for example a ping every minute), the connectivity is not
lost. As soon as I stop this, the connectivity will be lost within a
few hours.
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kvm images los
These may be related:
https://bugzilla.redhat.com/show_bug.cgi?id=571991 " libvirt should not
use the MAC address assigned to tap devices/vnet interfaces by the
TAP/TUN driver."
https://www.redhat.com/archives/libvir-list/2010-July/msg00450.html
"[libvirt] [PATCH] Set a stable & high MAC addr for
> If you don't mind, once you verify the host's /proc/net/arp entries
> before and after it goes bad, I'm going to whip up a recipe for trying
> to reproduce this without kvm, so we can reclassify it approrpriately.
I don't see the ARP entry for the guest at all on the host machine
before the net
Quoting Andrew Klettke (584...@bugs.launchpad.net):
> > So now is this going through the firewall?
> This is from the firewall.
>
> > What kind of firewall? Do other hosts inside the firewall have the
> > right ARP entry for the guest? What about the host itself?
> It's a simple i386 OpenBSD 4.7 b
> So now is this going through the firewall?
This is from the firewall.
> What kind of firewall? Do other hosts inside the firewall have the
> right ARP entry for the guest? What about the host itself?
It's a simple i386 OpenBSD 4.7 box with PF enabled. All traffic to and from the
Host and the VM
Quoting Andrew Klettke (584...@bugs.launchpad.net):
> General instability exists with this bug as well. For example, SSHing to
> the VM:
>
> $ ssh r...@192.168.8.166
> r...@192.168.8.166's password:
> Linux deb64 2.6.26-2-amd64 #1 SMP Sun Jun 20 20:16:30 UTC 2010 x86_64
>
> The programs include
General instability exists with this bug as well. For example, SSHing to
the VM:
$ ssh r...@192.168.8.166
r...@192.168.8.166's password:
Linux deb64 2.6.26-2-amd64 #1 SMP Sun Jun 20 20:16:30 UTC 2010 x86_64
The programs included with the Debian GNU/Linux system are free software;
the exact dist
I'm also having this problem. Running 10.04 with KVM and Libvirt,
starting VMs with "virsh start "
I've tested with OpenBSD 4.7 and Debian Lenny 5.0.5, both of them are
having this issue.
I notice that networking with the bridge works fine at first for my
guests, but after a while, the bridge sto
I can't reproduce this on my lucid testbox. Do you have networkmanager
or wicd installed? Leaving wicd installed, for instance, caused my
box to frequently add a duplicate default route, which stopped my
network.
Can you gather the output, both when network is up, and while it is
paused, of:
This is my /etc/network/interfaces
eth0 is connected to the local network, eth3 is reserved for the cluster
(it's a redhat cluster), domain.it is not the real domain...
I have no autostart network in libvirtd, the
/etc/libvirtd/qemu/networks/default.xml is the standard one as installed
by lucid l
Could someone experiencing this bug with a lucid or maverick host please
post your /etc/network/interfaces (or the equivalent info) and the contents
of your /etc/libvirt/qemu/network/autostart/default.xml (or whichever network
your guests are attached to)?
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kvm images losing connectivity w/brid
I have this problem with a Linux guest (Lucid) on a Linux host (Hardy)
that uses the backports KVM.
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It is not a KVM bug, it is a bridge bug, affecting adding and removing
interfaces from the bridge. qemu-ifup and qemu-ifdown do so, and
generates the bug, but it is not Windows or Linux VM related, not either
KVM related...
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kvm images losing connectivity w/bridged network
https://bugs.launchpa
Also, we don't really have access to Windows guests. Can anyone
reproduce this bug with a Linux guest, or is it affecting Windows guests
only?
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Can anyone reproduce this on Maverick at this point? We'd need to
reproduce and fix it there before getting a fix out to Lucid. And if it
is fixed there, then we can try to zero into a fix for Lucid.
** Changed in: qemu-kvm (Ubuntu)
Assignee: (unassigned) => Serge Hallyn (serge-hallyn)
**
The problem is also occouring, if the bridged devices are not touched in any
case.
Nothing was happening on the host side - all though the problem occours
somewhat sometimes randomally.
That is a ver, very, very nasty DOS bug - makes lucid complete unusable
as virtual hosting plattform.
CRITICA
None of the wor around ways are working, neither apparmor disable nor
making it manual
Critical DOS
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Alert! Occoured again $#!³!!!
OUCH OUCH OUCH
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This morning I had an freeze also.
The virtualized Hardy was freezed. (Host is Lucid-AMD64 on Xenons)
The virtualized Lucid was running fine. (on same Host)
The virtualized Dapper was running fine also (same Host).
The Hardy is on-production Server Ouch! Ouch! Ouch!
"I hate mondays"
--
kvm imag
Yesterday I saw another strange behavior.
I shutdown VM once a day to make a backup and I adjusted my scripts for
the 1-10 min network freeze, but yesterday the network did not unfreeze
at all. I restarted the machine and the network continued to be frozen!
I had to physically power off the machin
Here is a Log excerpt:
[ 1927.794336] br0: starting userspace STP failed, starting kernel STP
[ 8145.487525] type=1505 audit(1279203091.030:18): operation="profile_remove"
pid=7165 name="libvirt-d9018107-db16-f1f1-e1b9-b8ec787282aa" namespace="root"
[ 8145.585758] br0: port 5(vnet3) entering disa
Also here, it is a huge problem, which costs much money. such a nasty bug!
If in virtual servers are the network interfaces freezing - this is not amusing.
This bus stale a whole production server range!
Any ideas further ?
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kvm images losing connectivity w/bridged network
https://bugs.launchp
It is a bridge problem. I get the same freeze if I delete a tap interface from
the bridge. I was trying to use a "static" tap interface and use it from the
virtual machine, then I executed the command:
# brctl delif br0 tap0
and suddenly the network frozen in the same exact way, so I suppose that
@Thierry, I'm running the latest kvm version from the hardy ppa (it's newer
than the original hardy I believe):
Version: 1:84+dfsg-0ubuntu12.1~rc5ppa1
This is the line I use to start the VM:
screen -t development kvm -m 1024m -nographic -drive
file=development.raw,if=virtio,boot=on -net
nic,mac
I'm seeing this issue as well. I have a Hardy host system, with bridged
network. I start a lucid 64 bit kvm with virtio and a tap device (which
is in a bridge already) and after a while, the network seems down (from
outside, no ssh access etc). However, when I run a ping from within the
kvm instanc
Probably network freeze occur because of adding (on guest start-up) created
tun/tap interface to the bridge.
On guest shutdown tun/tap interface are removed from bridge. This add/remove
operation to/from bridge of tap interface causes network freeze in my case. I
have play around by replacing '-
I am also observed network freeze.
Used virtio drivers for network and for disk too (for WinXP/Win7 x86 guests),
On every guest shutdown and sometimes on guest start-up network connection (to
host and to guests) is interrupted from 2 seconds up to 10 seconds (sometimes
more, it vary).
My case:
L
Could you give us the version of the kvm package used, and the kvm
command line you use to start your VM ?
** Changed in: kvm (Ubuntu)
Importance: Undecided => High
** Changed in: kvm (Ubuntu)
Status: New => Incomplete
** Package changed: kvm (Ubuntu) => qemu-kvm (Ubuntu)
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