[libvirt-users] some problem with snapshot by libvirt
by xingxing gao
Hi,all,i am using libvirt to manage my vm,in these days i am testing
the libvirt snapshot ,but meet some problem:
the snapshot was created from this command:
snapshot-create-as win7 --disk-only --diskspec
vda,snapshot=external --diskspec hda,snapshot=no
but when i tried to revert from the snapshot which created from the
above command ,i got error below:
virsh # snapshot-revert win7 1338041515 --force
error: unsupported configuration: revert to external disk snapshot not
supported yet
version:
virsh # version
Compiled against library: libvir 0.9.4
Using library: libvir 0.9.4
Using API: QEMU 0.9.4
Running hypervisor: QEMU 1.0.93
10 years, 1 month
Re: [libvirt-users] virsh net-start default fails
by Michal Privoznik
On 22.10.2014 00:03, David Roundy wrote:
> Hi Michal,
>
> I am attaching debug logs.
>
> David
Well, I can see the error message there, but not the reason. Does the
/etc/libvirt/qemu/networks/default.xml file exist?
Michal
10 years, 1 month
[libvirt-users] The USB passthrough that refuses to die
by Mauricio Tavares
In trying to find out why my usb passthrough is not working, I decided
to edit (virsh edit) the config file for the vm client, removing the
following lines
<hostdev mode='subsystem' type='usb' managed='yes'>
<source>
<vendor id='0x051d'/>
<product id='0x0002'/>
</source>
</hostdev>
checking with "virsh dumpxml" that the lines went away, and then restarting
[root@vmhost ~]# virsh start nagios
error: Failed to start domain nagios
error: internal error Did not find USB device 51d:2 bus:2 device:3
[root@vmhost ~]#
As you can see, it is still acting like the usb device is defined.
What am I missing here?
10 years, 1 month
[libvirt-users] KVM incremental backup using CBT
by Jd
Hi
Looking in to implementing (CBT like) delta backup for KVM.
The following looks promising..(last paragraph)
http://wiki.qemu.org/Features/Snapshots2
* In the last para, there is a mention of copy the blocks from the
disk using dirty-bitmap as reference. How to accomplish this ?
block-mirror with bitmap or is there a qemu-img command ? some details
would be appreciated.
// backup software now reads foo.img using t0_dirty.dbmp to perform incremental backup, when finished
* The backup after few runs in the backup store would be base
image + bunch of delta blocks ? Will this be same as base disk and bunch
of deltas ? or there is some special way to merge these ?
* I am assuming this scheme (snapshot, bitmap, block merge etc.)
should work with base disk in raw (non-qcow) format as well ? Right ?
i.e. will it work when the storage disk is iscsi, lvm, fc ? std linux
block device?
* Are there libvirt-api/verbs for doing some of this or we will
have to sue the qemu-monitor-command ?
* What version of qemu/kvm will have the core capabilities and
which min libvirt version would be sufficient ?
Is there a better way to do incremental backup / CBT like backup
than one mentioned here ?
Thanks
/Jd
10 years, 1 month
[libvirt-users] reboot problem with libxl
by Alvin Starr
If I reboot a single vm through libvirt/libxl the system reboots normally.
If I have several vm's reboot at the same time then The systems go into
a paused state and do not reboot.
I then have to kill them via xl and restart them.
--
Alvin Starr || voice: (905)513-7688
Netvel Inc. || Cell: (416)806-0133
alvin(a)netvel.net ||
10 years, 1 month
[libvirt-users] VNC display size
by Aaron Bruelisauer
Hi
I would like to set the resolution of the video device of my domain. So
if I connect with via vnc I see more.
That is the part of the .xml file:
"...
<graphics type='vnc' port='-1' autoport='yes'/>
<video>
<model type='cirrus' vram='9216' heads='1'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02'
function='0x0'/>
</video>
..."
How can I change it?
Salutations
Aaron
10 years, 1 month
[libvirt-users] problem with libvirt and ovs
by Anna Giannakou
Hello,
I have defined an ovs network with libvirt (virsh net-define ovs.xml) and created a vm that will connect to that network with virt-install. Although the vm port appears normally if i do an ovs-vsctl show, when i try to set this port as a mirror port for all the traffic in the bridge, the command is executed normaly, but then i cannot see any traffic on the interface.
Could you give me some hints for that?
The ovs.xml:
<network>
<name>ovs-network</name>
<forward mode='bridge'/>
<bridge name='br-tun'/>
<virtualport type='openvswitch'/>
</network>
the virt-install command:
virt-install --connect qemu:///system --name snort3 --ram 2048 --disk path=/tmp/snort.qcow2,device=disk,format=qcow2 --graphics vnc --vcpus 2 --hvm --network network=ovs-network --import
the ovs command for mirroring
ovs-vsctl -- set interface vnet0 type=internal -- --id=@p get port vnet0 -- --id=@m create mirror name=m0 select-all=true output-port=@p -- set bridge br-tun mirrors=@m
if i execute the same command with another interface then i see the traffic normally.
Thank you
Anna
10 years, 1 month
[libvirt-users] Revert to internal snapshot - XML error: Non-empty feature list specified without CPU model
by Kashyap Chamarthy
Versions:
$ rpm -q libvirt-daemon-kvm qemu-system-x86
libvirt-daemon-kvm-1.2.9-3.fc21.x86_64
qemu-system-x86-2.1.2-4.fc21.x86_64
When I attempt to revert to an internal snapshot:
$ virsh snapshot-list node1
Name Creation Time State
------------------------------------------------------------
snap1 2014-06-03 14:07:28 -0400 running
$ virsh snapshot-revert node1 snap1
error: XML error: Non-empty feature list specified without CPU model
Contextual guest XML:
$ virsh dumpxml node1 | grep features -A3
<features>
<acpi/>
<apic/>
<pae/>
</features>
<cpu mode='host-passthrough'>
</cpu>
<clock offset='utc'>
I see it's thrown from here, src/conf/cpu_conf.c, from function:
virCPUDefParseXML:371
[. . .]
367 if (n > 0) {
368 if (!def->model && def->mode != VIR_CPU_MODE_HOST_MODEL) {
369 virReportError(VIR_ERR_XML_ERROR, "%s",
370 _("Non-empty feature list specified without "
371 "CPU model"));
372 goto error;
373 }
[. . .]
I can manually revert this snapshot via `qemu-img`, but wondering if
this error from libvirt expected in this case?
--
/kashyap
10 years, 1 month
[libvirt-users] libvirt with VirtualBox - possible to specify path to snapshot folder in domain.xml?
by fdytr ytruy
Hi!
I'm using libvirt withVirtual Box. I have installed libvirt 0.10.2 and Virtual Box 4.1.Is possible to spesify the pat to the folder I want my differencing image created in in my domain.xml file? When I define my vm (virsh domain.xml) with my domain.xml and use the readonly tag, Virual Box creates a differencing image (default in users Vitual Box VMs folder). I want to specify in my domain.xml file what folder this differencing image should be created in (not the default folder). Is this possible?
LL
10 years, 1 month
