[libvirt-users] Traffic mirroring
by Renich Bon Ciric
Hello,
We're interested in mirroring traffic from a host's guests to another
host's guest. We've been able to achieve that on the same host;
redirecting traffic from the host's bridge interface (VLAN) to one of
the guest's in the same host by using the tc command.
But, when it comes to traffic from one host to the other, we haven't
been able to pull it through. Please, check out this image:
http://ctrlv.in/720433
In this case, we are able to mirror the traffic from host11 into the
Ubuntu guest; but not the traffic from host10 or host9 into the Ubuntu
guest on host11.
Any help regarding this is appreciated. Thank you.
--
Renich Bon Ciric
Operations | CloudSigma
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8 years, 7 months
[libvirt-users] Convincing libvirt to create a bridge device?
by Lars Kellogg-Stedman
I was hoping that I could delegate creation of bridge devices to
libvirt for address-less bridges, in order to not have to deal with
the various ways distributions handle persistent network
configuration, but while this creates a libvirt network...
<network>
<name>provision</name>
<forward mode='bridge'/>
<bridge name='brprov'/>
</network>
...it doesn't actually create the bridge. Configuring the bridge
using either <forward mode="route"/> or <forward mode="nat"/> *will*
create the bridge device, but both of these require assigning an
address to the bridge which means I have to suddenly worry about
IPAM and conflicts with local networks.
I look at the various interface-related commands, and there is an
"iface-bridge" command but this requires a physical interface.
Is there any way to convince libvirt to create the bridge device for a
<forward mode='bridge'/> network?
--
Lars Kellogg-Stedman <lars(a)redhat.com> | larsks @ {freenode,twitter,github}
Cloud Engineering / OpenStack | http://blog.oddbit.com/
8 years, 7 months
[libvirt-users] [libvirt-1.3.2]'Disconnected from qemu:///session due to I/O error'
by Predrag Ivanovic
Hi.
Since the update to libvirt-1.3.2, virsh keeps disconnecting from qemu:///session.
Weirdly enough, qemu:///session works fine for root, and qemu:///system works for both the user and the root.
With the same configuration(tarball with files from /etc/libvirt attached), libvirt-1.3.1 works without problems.
From the virsh debug log(attached):
---
grep error virsh.log.1.3.2
2016-03-03 19:19:20.338+0000: 5589: error : virNetSocketReadWire:1613 : End of file while reading data: Input/output error
2016-03-03 19:19:46.261+0000: 5578: error : virConnectUnregisterCloseCallback:1282 : Requested operation is not valid: A different callback was requested
2016-03-03 19:22:59.308+0000: 14487: error : virNetSocketReadWire:1613 : End of file while reading data: Input/output error
2016-03-03 19:23:29.247+0000: 14486: error : virConnectUnregisterCloseCallback:1282 : Requested operation is not valid: A different callback was requested
2016-03-03 19:24:49.521+0000: 14487: error : virKeepAliveTimerInternal:143 : internal error: connection closed due to keepalive timeout
2016-03-03 19:25:17.043+0000: 14486: error : virConnectUnregisterCloseCallback:1282 : Requested operation is not valid: A different callback was requested
2016-03-03 19:25:47.110+0000: 14487: error : virNetSocketReadWire:1613 : End of file while reading data: Input/output error
2016-03-03 19:26:18.573+0000: 14486: error : virConnectUnregisterCloseCallback:1282 : Requested operation is not valid: A different callback was requested
2016-03-03 19:28:24.142+0000: 14665: error : virNetSocketReadWire:1613 : End of file while reading data: Input/output error
2016-03-03 19:28:55.091+0000: 14664: error : virConnectUnregisterCloseCallback:1282 : Requested operation is not valid: A different callback was requested
---
From the virt-manager.log (attached):
---
[Thu, 03 Mar 2016 18:39:38 virt-manager 24388] DEBUG (connection:1310) Error polling connection qemu:///session
if ret is None: raise libvirtError ('virNodeGetInfo() failed', conn=self)
libvirtError: internal error: client socket is closed
if ret == -1: raise libvirtError ('virConnectDomainEventDeregisterAny() failed', conn=self)
libvirtError: internal error: client socket is closed
[Thu, 03 Mar 2016 19:07:14 virt-manager 5191] ERROR (create:667) Error setting create wizard conn state.
if ret is None: raise libvirtError ('virConnectGetCapabilities() failed', conn=self)
libvirtError: internal error: client socket is closed
[Thu, 03 Mar 2016 19:07:15 virt-manager 5191] DEBUG (connection:1310) Error polling connection qemu:///session
if ret is None: raise libvirtError ('virNodeGetInfo() failed', conn=self)
libvirtError: internal error: client socket is closed
if ret == -1: raise libvirtError ('virConnectDomainEventDeregisterAny() failed', conn=self)
libvirtError: internal error: client socket is closed
[Thu, 03 Mar 2016 19:08:19 virt-manager 5191] DEBUG (connection:1310) Error polling connection qemu:///session
if ret is None: raise libvirtError ('virNodeGetInfo() failed', conn=self)
libvirtError: internal error: client socket is closed
if ret == -1: raise libvirtError ('virConnectDomainEventDeregisterAny() failed', conn=self)
libvirtError: internal error: client socket is closed
[Thu, 03 Mar 2016 19:11:19 virt-manager 5191] DEBUG (connection:1310) Error polling connection qemu:///system
if ret is None: raise libvirtError ('virNodeGetInfo() failed', conn=self)
libvirtError: internal error: client socket is closed
if ret == -1: raise libvirtError ('virConnectDomainEventDeregisterAny() failed', conn=self)
libvirtError: internal error: client socket is closed
---
qemu:///system errors above are due to restarting libvirtd, once virt-manager connected to it, it stayed connected.
This is with qemu-2.5.0.
I could try libvirt master from git, but will it break libvirt-python/virt-manager?
Btw, is building libvirt with '--enable-debug' sufficient for useful gdb debug report, or do you need anything else?
Thank you.
Pedja
8 years, 7 months
[libvirt-users] network checksum offloading broken using virtio
by Dennis Jacobfeuerborn
Hi,
with recent guest installs (both centos 5 and 7) on centos 7 hosts I
seem to have to disable checksum offloading using "ethtool -K eth0 tx
off" in order to allow traffic to flow a specific route.
Basically the guest is installed with IP 192.168.21.10 and a default
gateway of 192.168.21.254. Up until that point I can ssh into the system
normally.
There exists an OpenVPN System with the IP 192.168.21.1 that choses
client IP's for the vpn connections from the pool 192.168.20.0/24.
In order to pass the reponses back to the OpenVPN system I installed the
route "192.168.20.0/24 via 192.168.21.1 dev eth0".
When I now ping the IP 192.168.21.10 through the VPN connection this
works fine but when I try to ssh into that system the connection just
hangs. Looking at a tcpdump I noticed that the checksum for the packets
weren't quite right so I issued a "ethtool -K eth0 tx off" and suddenly
everything worked as expected.
What is strange here is that I'm seeing this with both CentOS 5 and
CentOS 7 guests and only when dealing with th routed traffic and not the
regular one.
Does anyone have an idea what is going on here? Could this be an issue
with the virtio driver?
Regards,
Dennis
8 years, 7 months
[libvirt-users] Why are virsh vol-upload/vol-download so slow?
by Lars Kellogg-Stedman
I was interested in using 'virsh vol-upload' and 'virsh vol-download',
rather than mucking about directly with the filesystem. But while
simply copying the image is relatively quick:
# ls -l /var/lib/libvirt/images/centos-7-cloud.qcow2
-rw-r--r--. 1 qemu qemu 1004994560 Apr 15 2015 centos-7-cloud.qcow2
# time cp /var/lib/libvirt/images/centos-7-cloud.qcow2 /tmp/myimage.qcow2
real 0m10.829s
user 0m0.024s
sys 0m1.668s
Trying to do the same thing with `virsh vol-download` is glacial:
# time virsh vol-download --pool default centos-7-cloud.qcow2 /tmp/myimage.qcow2
I killed it after 10 minutes:
real 10m20.775s
user 10m19.451s
sys 0m1.887s
After which is was about halfway through:
# ls -l /tmp/myimage.qcow2
-rw-r--r--. 1 root root 564920248 Mar 4 11:11 /tmp/myimage.qcow2
What is up with that?
--
Lars Kellogg-Stedman <lars(a)redhat.com> | larsks @ {freenode,twitter,github}
Cloud Engineering / OpenStack | http://blog.oddbit.com/
8 years, 7 months
[libvirt-users] control virtualbox from virsh
by jeremy.huylebroeck＠orange.com
Hi.
I am running virtualbox 4.3 on Mac OS X 10.11.12 and libvirtd 1.3.1 (installed with brew).
I want to control the virtual machines via virsh.
On libvirtd, I enabled tcp mode, removed all the authentication etc.. It's a development environment, so no worries here.
It allows me to make a call such as:
virsh –c vbox+tcp://172.30.5.51/session list —all
172.30.5.51 being my Mac IP address.
Virsh connects successfully to libvirtd (I see my request in the log) but the "list —all" returns an error.
virsh -c vbox+tcp://172.30.5.51/session list --all
error: Failed to list domains
error: invalid connection pointer in virGetDomain
Based on the debug logs, it appears the vbox driver is properly used
2016-03-03 22:27:44.415+0000: 18446744073709551615: debug : do_open:1003 : name "vbox:///session" to URI components:
scheme vbox
server <null>
user <null>
port -1
path /session
(…)
2016-03-03 22:27:44.416+0000: 18446744073709551615: debug : do_open:1050 : trying driver 4 (VBOX) ...
2016-03-03 22:27:44.416+0000: 18446744073709551615: debug : virArchFromHost:181 : Mapped x86_64 to 32 (x86_64)
2016-03-03 22:27:44.416+0000: 18446744073709551615: info : virObjectNew:202 : OBJECT_NEW: obj=0x7fa41950b2c0 classname=virCaps
2016-03-03 22:27:44.416+0000: 18446744073709551615: debug : virArchFromHost:181 : Mapped x86_64 to 32 (x86_64)
2016-03-03 22:27:44.416+0000: 18446744073709551615: info : virObjectNew:202 : OBJECT_NEW: obj=0x7fa41a208da0 classname=virDomainXMLOption
2016-03-03 22:27:44.416+0000: 18446744073709551615: debug : vboxConnectOpen:460 : in vboxOpen
2016-03-03 22:27:44.416+0000: 18446744073709551615: debug : do_open:1065 : driver 4 VBOX returned SUCCESS
But later there is this error:
2016-03-03 22:27:44.420+0000: 18446744073709551615: debug : virThreadJobSet:96 : Thread 18446744073709551615 (virNetServerHandleJob) is now running job remoteDispatchConnectListAllDomains
2016-03-03 22:27:44.420+0000: 18446744073709551615: debug : virEventPollCleanupTimeouts:526 : Cleanup 2
2016-03-03 22:27:44.420+0000: 18446744073709551615: debug : remoteDispatchConnectListAllDomainsHelper:1219 : server=0x7fa419700040 client=0x7fa4196037c0 msg=0x7fa41a201280 rerr=0x700000415d40 args=0x7fa419602c90 ret=0x7fa419600ad0
2016-03-03 22:27:44.420+0000: 18446744073709551615: debug : virEventPollCleanupHandles:575 : Cleanup 5
2016-03-03 22:27:44.420+0000: 18446744073709551615: debug : virConnectListAllDomains:6701 : conn=0x7fa41950afe0, domains=0x700000415c40, flags=3
2016-03-03 22:27:44.420+0000: 18446744073709551615: debug : virEventPollMakePollFDs:401 : Prepare n=0 w=1, f=5 e=1 d=0
2016-03-03 22:27:44.420+0000: 18446744073709551615: debug : virEventPollMakePollFDs:401 : Prepare n=1 w=2, f=7 e=1 d=0
2016-03-03 22:27:44.420+0000: 18446744073709551615: debug : virEventPollMakePollFDs:401 : Prepare n=2 w=3, f=9 e=1 d=0
2016-03-03 22:27:44.420+0000: 18446744073709551615: debug : virEventPollMakePollFDs:401 : Prepare n=3 w=4, f=11 e=1 d=0
2016-03-03 22:27:44.420+0000: 18446744073709551615: debug : virEventPollMakePollFDs:401 : Prepare n=4 w=8, f=12 e=1 d=0
2016-03-03 22:27:44.420+0000: 18446744073709551615: debug : virEventPollCalculateTimeout:338 : Calculate expiry of 2 timers
2016-03-03 22:27:44.420+0000: 18446744073709551615: debug : virEventPollCalculateTimeout:346 : Got a timeout scheduled for 1457044069419
2016-03-03 22:27:44.420+0000: 18446744073709551615: debug : virEventPollCalculateTimeout:359 : Schedule timeout then=1457044069419 now=1457044064420
2016-03-03 22:27:44.420+0000: 18446744073709551615: debug : virEventPollCalculateTimeout:369 : Timeout at 1457044069419 due in 4999 ms
2016-03-03 22:27:44.420+0000: 18446744073709551615: info : virEventPollRunOnce:641 : EVENT_POLL_RUN: nhandles=5 timeout=4999
2016-03-03 22:27:44.421+0000: 18446744073709551615: error : virGetDomain:203 : invalid connection pointer in virGetDomain
2016-03-03 22:27:44.422+0000: 18446744073709551615: debug : virThreadJobClear:121 : Thread 18446744073709551615 (virNetServerHandleJob) finished job remoteDispatchConnectListAllDomains with ret=-1
The full log is here http://pastebin.com/raw/83Fgs5MZ
I've been digging around but can't find anything I should change in my configuration or in virtualbox.
I poked in the libvirt code, but I am not a C developer, so can't really figure it out.
Any chance somebody sees a solution to this?
There must be something obvious that I don't see…
Thanks!
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Thank you.
8 years, 7 months
[libvirt-users] Configuring default network/storage for qemu:///session
by catern＠catern.com
Hi libvirt-user,
If I run (as a normal user):
virsh -c qemu:///session net-list --all
virsh -c qemu:///session pool-list --all
I see a default network and a default pool. And indeed, these appear in
the persistent configuration. It seems these are created the first time
libvirtd is (auto)started in qemu:///session mode. Is it possible to
configure the attributes of the default network and default pool that
are created?
This is to provide configuration for newly created users. Normally I
would just put some default configuration in /etc/skel.
But it seems that a UUID element needs to be present in the network and
pool configuration. And so for my configuration to be correct I either
need to wrap add some special sauce to adduser that generates several
UUIDs and puts them in the configuration, or just generate the UUIDs in
advance and let them be copied to all users. Currently I'm taking the
second option, so all users have the same UUID for their default network
and pool. I don't know if that might hurt me in the future, but it
certainly seems distasteful.
Thanks!
8 years, 7 months
[libvirt-users] libvirt_driver_storage.so /usr/lib64/../lib64/libfl.so.2: undefined symbol: yylex
by Matthew Schumacher
Hello List,
I'm trying to get libvirt to work on slackware64-current
(slackware64-14.2 beta) and while it compiles just fine, it refuses to
run because of an undefined symbol:
2016-03-01 20:09:26.822+0000: 27849: error : virDriverLoadModule:73 :
failed to load module
/usr/lib64/libvirt/connection-driver/libvirt_driver_storage.so
/usr/lib64/../lib64/libfl.so.2: undefined symbol: yylex
I'm not really doing anything odd, here is my configure options in my
package building script:
./configure \
--prefix=/usr \
--libdir=/usr/lib64 \
--bindir=/usr/sbin \
--sbindir=/usr/sbin \
--sysconfdir=/etc \
--localstatedir=/var \
--mandir=/usr/man \
--docdir=/usr/doc/libvirt-1.3.3 \
--enable-static=no \
--enable-shared=yes \
--with-yajl \
--with-python=/usr \
--with-qemu-group=users \
--with-init-script=none \
--with-storage-iscsi
Looks like the old slackware64-14.1 had flex compiled statically and the
new version is an SO, so I figure that's why this didn't happen on the
older slackware.
Any thoughts on how to fix this?
8 years, 7 months
[libvirt-users] Live migration - backing file
by Marc-Aurèle Brothier - Exoscale
Hi!
I'm testing the live migration on libvirt + KVM, the VMs are using non-shared local storage only. If I run a live migration with --copy-storage-full, the final disk file on the remote host after the migration has a full blown size of the specified value (10G) in my case, instead of the few MB on the source host before the migration. Running qemu-img I can see that the ref for the backing file is gone.
on source host:
$ ls -lh 3129b8a8-eca4-4b05-878a-66c2771b501f gives me 18MB
$ qemu-img info 3129b8a8-eca4-4b05-878a-66c2771b501f
image: 3129b8a8-eca4-4b05-878a-66c2771b501f
file format: qcow2
virtual size: 10G (10737418240 bytes)
disk size: 17M
cluster_size: 65536
backing file: /var/lib/libvirt/images/34fa65ce-483b-4ffa-88f8-75f6ebf670c1
Format specific information:
compat: 1.1
lazy refcounts: false
refcount bits: 16
corrupt: false
>> I run a migration with --live --copy-storage-all
on destination host:
$ ls -lh 3129b8a8-eca4-4b05-878a-66c2771b501f gives me 11GB
$ qemu-img info 3129b8a8-eca4-4b05-878a-66c2771b501f
image: 3129b8a8-eca4-4b05-878a-66c2771b501f
file format: qcow2
virtual size: 10G (10737418240 bytes)
disk size: 817M
cluster_size: 65536
Format specific information:
compat: 0.10
refcount bits: 16
Is there a way to keep the backing file reference for live migration or planned development (if this file is also available on the destination host)?
I also tried with --copy-storage-inc but the disk image on the destination is invalid as it lost the backing file and only copied the diff, so the base image files are gonne. Moreover, the file size on the disk is also of 10GB with that parameter.
Regards,
Marc-Aurèle Brothier
Exoscale
8 years, 7 months
[libvirt-users] ceph and libxl errors attaching device
by Iban Cabrillo
Dear,
I need to attach some ceph (0.94.6) block devices to our openstack
(kilo) running instances (xen 4.4) .
Nova is able to create volumes, attach a detach (alt least there are no
errors)
The hypervisor can see the blockdevice:
# rbd -p volumes ls
volume-xxxxxxxx-7342-434b-9xx1-d046bcxxxxfd
And the instance xml seems to be ok:
.................
<disk type='network' device='disk'>
<driver name='qemu' type='raw' cache='none'/>
<auth username='cinder'>
<secret type='ceph' uuid='xxxxxxxx-e53a-4xx7-9bc9-9bcc41xxxxe4'/>
</auth>
<source protocol='rbd'
name='volumes/volume-xxxxxxxx-7342-434b-9xx1-d046bcxxxxfd'>
<host name='10.10.3.1' port='6789'/>
<host name='10.10.3.2' port='6789'/>
<host name='10.10.3.3' port='6789'/>
</source>
<target dev='xvdd' bus='xen'/>
<serial>xxxxxxxx-7342-434b-9xx1-d046bcxxxxfd</serial>
</disk>
But there is no way to attach the device to running machine, I only
see this error on libxl :
libxl: debug: libxl.c:3538:libxl_device_disk_add: ao 0x7fe248006080:
create: how=(nil) callback=(nil) poller=0x7fe24000ce20
libxl: debug: libxl_device.c:251:libxl__device_disk_set_backend: Disk
vdev=xvdd spec.backend=qdisk
libxl: debug: libxl_event.c:618:libxl__ev_xswatch_deregister: watch
w=0x7fe248001780: deregister unregistered
libxl: debug: libxl_event.c:1591:libxl__ao_complete: ao 0x7fe248006080:
complete, rc=0
libxl: debug: libxl.c:3538:libxl_device_disk_add: ao 0x7fe248006080:
inprogress: poller=0x7fe24000ce20, flags=ic
libxl: debug: libxl_event.c:1563:libxl__ao__destroy: ao 0x7fe248006080:
destroy
Seems like qdisk backend is not able to manage the volume
Any idea?
--
############################################################################
Iban Cabrillo Bartolome
Instituto de Fisica de Cantabria (IFCA)
Santander, Spain
Tel: +34942200969
PGP PUBLIC KEY:
http://pgp.mit.edu/pks/lookup?op=get&search=0xD9DF0B3D6C8C08AC
############################################################################
Bertrand Russell:
*"El problema con el mundo es que los estúpidos están seguros de todo y los
inteligentes están llenos de dudas*"
8 years, 7 months