gmane.comp.emulators.libvirt.user

Re: [virt-tools-list] How to use xl (in place of xm) with libvirt 1.0.2 and Xen 4.2.1 in Ubuntu 13.04?

Gizmo Chicken — 2013-05-19T05:47:02

Hi Jim,

Thanks much for suggestions.  And please accept my apologies for not
replying sooner.  Your reply got buried in lots of other list-serve
messages.

You asked:   "Ensure xend is *not* running and then restart libvirtd.  The
libvirt libxl driver will only load when xend is not running."

I'm a bit new at this, but I was under the impression that setting setting
toolstack=xl in /etc/default/xen would prevent xend from starting.  That
is, I thought that xend wouldn't start when xl was running.  Am I totally
wrong about that?

In any case, xl is running and if I try to send an xm command, I get the
following:  "A different toolstack (xl) has been selected!"  Is there
something else that I should try to insure that xend isn't running?

(As a reminder, if I set toolstack=xm in /etc/default/xen, virt-manager
works great.  But I'm hoping to use the xl toolstack.)

You asked:  "Did the libxl driver even load?  There should be some evidence
of that in libvirtd.log."

My libvirtd.log doesn't seem provide any ev

Re: Two VF cards

Dominik Mostowiec — 2013-05-17T15:53:15

Thanks for your response.

For two different mac addresses problem is the same.
"error: internal error process exited while connecting to monitor: kvm:
-device pci-assign,configfd=25,host=01:10.1,id=hostdev0,bus=pci.0,addr=0x4:
Duplicate ID 'hostdev0' for device"

domain:
<domain xmlns:qemu="http://libvirt.org/schemas/domain/qemu/1.0" type="kvm">
        <name>one-466</name>
        <vcpu>1</vcpu>
        <memory>1781760</memory>
        <os>
                <type arch="x86_64">hvm</type>
                <boot dev="hd"/>
        </os>
        <devices>
                <emulator>/usr/bin/kvm</emulator>
                <disk type="file" device="disk">
                        <source
file="/nebula/nebula/var//datastores/0/466/disk.0"/>
                        <target dev="hda" bus="virtio"/>
                        <driver name="qemu" type="raw" cache="default"/>
                </disk>
                <disk type="file" device="disk">
                        <source
file="/nebula/nebula/var//datastores/0/466/di

Re: Two VF cards

Michal Privoznik — 2013-05-17T08:15:32

This is not a good idea to have two NICs sharing the same MAC.



I guess nothing. Libvirt has generated the same IDs for two devices
which is obviously libvirt's faul even in case two NICs sharing the same
MAC. Can you post full domain XML (possibly with network XMLs)? I'll try
to reproduce and maybe I'll find what's wrong.

Michal

Two VF cards

Dominik Mostowiec — 2013-05-16T21:45:19

Hi,
I try to add 2 VF functions to VM via network.
Livirt networks:
vnet0:
<network>
  <name>vnet0</name>
  <forward mode='hostdev' managed='yes'>
    <pf dev='eth0'/>
  </forward>
</network>

vnet1:
<network>
  <name>vnet0</name>
  <forward mode='hostdev' managed='yes'>
    <pf dev='eth1'/>
  </forward>
</network>

In VM configuration:
 <interface type="network">
     <source network="vnet0"/>
     <mac address="52:54:0a:b1:48:07"/>
 </interface>
 <interface type="network">
     <source network="vnet1"/>
     <mac address="52:54:0a:b1:48:07"/>
 </interface>

VM can't start because:
 kvm: -device
pci-assign,configfd=24,host=01:10.1,id=hostdev0,bus=pci.0,addr=0x4:
Duplicate ID 'hostdev0' for device

libvirt version 1.0.5.

What i am doing wrong?

--
Regards
Dominik
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nova compute libvirt driver and libvirtcompatibility

arvind viswanathan — 2013-05-17T00:27:21

Hi,
libvirt driver module to communicate with host libvirt. I was wondering if
there are any compatibility matrix available between the nova libvirt
driver and the libvirt installed in the host ?
Thanks
Arvind
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Re: connect to esx: Could not find HostSystem with name '(null)'

Matthias Bolte — 2013-05-16T15:37:18

2013/5/16 Dimitri Nilsen <dimitri.nilsen-Qicz5VY8OY0< at >public.gmane.org>:

Is the host name in the URI referring to this vCenter? In this case
you need to use a vpx:// style URI:

virch -c vpx://vcenter-server/datacenter/esx-server?no_verify=1&auto_answer=1

See http://libvirt.org/drvesx.html#uriformat for more details.

But actually libvirt should complain if you use a esx:// URI to
connect to a vCenter server.

--
Matthias Bolte
http://photron.blogspot.com

Re: connect to esx: Could not find HostSystem with name '(null)'

Dimitri Nilsen — 2013-05-16T08:21:04

Hi,

its vCenter, Version 4.1 Update 3.

I am trying to connect from Centos6,
libvirt-0.10.2-18.el6_4.4.x86_64
libvirt-client-0.10.2-18.el6_4.4.x86_64

Regards

Re: snapshot create error,unable to find cgroup for vm

Gao Yongwei — 2013-05-16T04:32:35

2013/5/16 Gao Yongwei <itxx00-Re5JQEeQqe8AvxtiuMwx3w< at >public.gmane.org>

Hello Blake ,here are some debug log info : http://paste.ubuntu.com/5669714/
thanks.
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Does Set Block IO tune take effect in the samesession.

vikrant verma — 2013-05-16T03:59:44

Hello All,

I am using virDomainSetBlockIoTune() API to set the IO tune parameter for a
running guest VM.

I observed that after setting the value succesfully i ned to Shutdown and
start the VM inorder to take the set value in effect.

Is there any way with which these values come in effect in the same session
of the VM without Shutting down and starting the VM.

Please help

regards,
Vikrant
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Re: Getting libvirt Error when setting IO tune read_bytes_sec value using libvirt API virDomainSetBlockIotune

vikrant verma — 2013-05-16T03:55:12

Hello All,

The problem got solved after adding the repo

apt-add-repository ppa:dnjl/virtualization

this provides newer version of qemu, with which i am able to get the
desired result

thanks to all

regards,
vikrant

On Mon, May 13, 2013 at 9:24 PM, Eric Blake <eblake-H+wXaHxf7aLQT0dZR+AlfA< at >public.gmane.org> wrote:

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Re: snapshot create error,unable to find cgroup for vm

Gao Yongwei — 2013-05-16T03:20:25

2013/5/16 Gao Yongwei <itxx00-Re5JQEeQqe8AvxtiuMwx3w< at >public.gmane.org>

https://bugzilla.redhat.com/show_bug.cgi?id=963514
thanks.
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Re: snapshot create error,unable to find cgroup for vm

Gao Yongwei — 2013-05-16T02:08:24

Are you using RHEL? If so, please open a support incident with Red Hat.
my production environment .
I will test 1.0.5 later ,now I am  very worried ;(
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Re: snapshot create error, unable to find cgroup for vm

Eric Blake — 2013-05-16T01:55:06

Red herring.  This is a warning, and has nothing to do with the actual
error (it has since been patched in upstream libvirt).


Are you using RHEL? If so, please open a support incident with Red Hat.
 If not, can you reproduce the problem when you upgrade to libvirt 1.0.5?

snapshot create error, unable to find cgroup for vm

Gao Yongwei — 2013-05-16T01:32:10

Hello:
Yesterday I yum update libvirt from 0.9.10 to 0.10.2 ,after update I got
some error in libvirtd.log
 like this:
2013-05-10 07:39:09.440+0000: 18824: warning : virCgroupMoveTask:885 : no
vm cgroup in controller 3
2013-05-10 07:39:09.440+0000: 18824: warning : virCgroupMoveTask:885 : no
vm cgroup in controller 4
2013-05-10 07:39:09.440+0000: 18824: warning : virCgroupMoveTask:885 : no
vm cgroup in controller 6
so,I restarted cgconfig and libvirtd daemon :

service cgconfig restart ;
service libvirtd restart

after that ,I cannot create snapshot for vm anymore.and error log message
below:
2013-05-16 01:13:23.638+0000: 28848: error :
qemuDomainSnapshotCreateDiskActive:11299 : internal error Unable to find
cgroup for vm1

my version info :
# rpm -q libvirt
libvirt-0.10.2-18.el6_4.4.x86_64
# rpm -q qemu-kvm
qemu-kvm-0.12.1.2-2.295.el6_3.1.x86_64

in /cgroup dir I cannot find anything about vm1.how can I recover the
missing cgroup for vm ?
thanks !
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Re: connect to esx: Could not find HostSystem with name '(null)'

Matthias Bolte — 2013-05-15T21:18:30

2013/5/15 Dimitri Nilsen <dimitri.nilsen-Qicz5VY8OY0< at >public.gmane.org>:

According to line number for esxVI_LookupManagedObjectHelper in the
debug log this looks like libvirt 0.10.2.1 actually.


First of all you found an error in the bug reporting here. The error
message should read just 'Could not find HostSystem'.

Anyway, the error says that libvirt couldn't find the HostSystem
object for that ESX server. This is quite unexpected.

What ESX server version are you using? Is this a standalone server? Or
is it managed by a vCenter server? Is it part of a cluster?

--
Matthias Bolte
http://photron.blogspot.com

libvir: QEMU Driver error : internal error Cannotfind suitable emulator for armv7l

Clark Laughlin — 2013-05-15T17:21:12

Hello,

I am trying to run OpenStack (via devstack) on an Arndale board using Linaro's 13.04 release.  I am getting a libvirt error that I was hoping someone could provide some more detail about:


libvir: QEMU Driver error : internal error Cannot find suitable emulator for armv7l


If this is coming from libvirt, what is it looking for for a suitable emulator?  Or, is this something I need to search starting with QEMU?

Thank you in advance,
Clark L

Re: Pre-requisites to use Java bindings with QEMU

Eric Blake — 2013-05-15T16:10:56

[Please don't top-post on technical lists]


Correct.


No need to do this manually; connecting to a qemu:///session URI will do
it automatically under the hood on your behalf.


Correct.


Nope, it sounds like you got it.

Re: Pre-requisites to use Java bindings with QEMU

Lior Vernia — 2013-05-15T15:57:15

Hello Eric,

Thank you for your thorough answer. Of course if I don't have to run
libvirtd as a privileged user, then I don't have any problem with
interacting with QEMU through the standard mechanism.

So just to summarize, this is what I understand would suffice for my Java
program to be able to manage VMs through the bindings:
1. Install QEMU, libvirt daemon and libvirt QEMU driver (no worries about
the distribution-specific package names).
2. Run libvirtd (probably with the -d flag?).
3. Run Java program with same user that ran libvirtd, using the QEMU
session (as opposed to system) URI.

Please correct me if I got anything wrong or if I'm missing another
dependency.

Thanks again, Lior.


On Mon, May 13, 2013 at 6:40 PM, Eric Blake <eblake-H+wXaHxf7aLQT0dZR+AlfA< at >public.gmane.org> wrote:

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connect to esx: Could not find HostSystem with name'(null)'

Dimitri Nilsen — 2013-05-15T07:24:54

Hi all,

I am trying to connect to esx vi libvirt 0.10.2.

virsh # connect esx://hostname?no_verify=1&auto_answer=1
error: Failed to connect to the hypervisor
error: internal error Could not find HostSystem with name '(null)'

could you give me a hint, what could be a reason for that problem

in a debug log of libvirt I see:
14447: debug : virAuthGetConfigFilePath:77 : Checking for readability of 
'/root/.libvirt/auth.conf'
14447: debug : virAuthGetConfigFilePath:86 : Checking for readability of 
'/etc/libvirt/auth.conf'
14447: debug : virAuthGetConfigFilePath:95 : Using auth file '(null)'
14447: error : esxVI_LookupManagedObjectHelper:4854 : internal error 
Could not find HostSystem with name '(null)'
14447: debug : do_open:1180 : driver 1 ESX returned ERROR

Regards
Dimitri

Re: Designing libvirt client

Daniel P. Berrange — 2013-05-15T08:54:15

The libvirt client & server are both multi-thread safe - you can have
multiple threads using the same virConnectPtr object & it'll do the
right thing with locking. So, yes, our recommendation is to use threads
in applications which need non-blocking behaviour


The only callbacks we have are for receiving event notifications. We
don't have any async methods in the libvirt core API


Yes, libvirtd is fully multi-threaded and thus will process requests
in parallel, even requests from the same client.


Depending your application, there is also the possibility of using the
slightly higher level   libvirt-gobject library (part of the libvirt-glib
codebase).  This library integrates with GObject and GIO to provide
async methods with callbacks on completion as you describe. The main
limitation of this library is that it doesn't have 100% coverage of the
current main libvirt APIs. It is being developed mostly to serve features
required by the GNOME boxes application, since that's the main user of
it currently. Of

convert only partition instead of whole disk(virt-p2v)

2013-05-15T06:35:26

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