- Users - libvirt List Archives

[libvirt-users] [virt-tools-list] How to solve the UID repeatetion problem of virt-clone one WINDOWS virtual machine
by cochen 14 Jun '13

14 Jun '13

Hi all: If I use "virt-clone" to clone a windows virtual machine , the new windows vm is sure be have a uid which the same with the source windows. How can I make them difference auto? Best regards; chencong

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[libvirt-users] can virsh set the cpuset attribute of <vcpu ..> (CPU Allocation) ?
by Edoardo Comar 14 Jun '13

14 Jun '13

Is it possible to use virsh to set the cpuset attribute of the CPU Allocation element in a domain ? <domain> ... <vcpu placement='static' cpuset="1-4,^3,6" current="1">2</vcpu> ... </domain> I have seen that virsh vcpupin and virsh emulatorpin can be used to query and set the cpusets of the <vcpupin> and <emulatorpin> children elements of <cputune> which override the cpuset of <vcpu>. If i did not have to pin to different PCPUs, I would execute just one command for the whole domain rather than one command per VCPU + one per the emulator threads. Thanks! -------------------------------------------------- regards, Edoardo Comar WebSphere Application Service Platform for Networks (ASPN) ecomar(a)uk.ibm.com IBM UK Ltd, Hursley Park, SO21 2JN Unless stated otherwise above: IBM United Kingdom Limited - Registered in England and Wales with number 741598. Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU

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Re: [libvirt-users] How to mount / use a hard disk partition for libvirt instead of created a new virtual disk
by Roland Giesler 13 Jun '13

13 Jun '13

I change the topic to be more descriptive. I hope this doesn't break the message threading of this list! On Thu, Jun 13, 2013 at 8:48 PM, Roland Giesler <roland(a)giesler.za.net> wrote: > Surely there must be someone here that knows how to do this? Maybe > someone that has used some other partition type in this way? > > On Mon, Jun 10, 2013 at 10:06 PM, Roland Giesler <roland(a)giesler.za.net> wrote: >> I'm running Ubuntu desktop 12.10 with libvirt and virt-manager (gui). >> >> I have been led to believe that it is possible to use and existing partition >> as the disk storage volume for a virtual machine. >> >> The windows partition is /dev/sda2, but if I use fs: Pre-formatted Block >> Device I can select the partion. What I can't figure out is how to tell the >> vitual machine to use this volume. >> >> I tried with virt-manager, but the only options I have are >> >> * Local media >> * Network install >> * Network Boot >> * Import Existing Disk Image >> >> How can I do this? >> >> regards >> >> Roland Giesler >>

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[libvirt-users] Starting libvirt management daemon: failed!
by Евгений Суворов 13 Jun '13

13 Jun '13

Hello all, I had Debian 6.0.6 and libvirt 0.8.3 but it is was default installed without ESXi support (sudo apt-get install libvirt-bin). And it was working. I downloaded libvirt 0.9.12 and and have result: $ ./configure --with-exsi $ make $ sudo make install oneadmin@debian:~$ virsh virsh: /usr/local/lib/libvirt.so.0: version `LIBVIRT_PRIVATE_0.9.12' not found (required by virsh) oneadmin@debian:~$ /etc/init.d/libvirt-bin start Starting libvirt management daemon: libvirtd/usr/sbin/libvirtd: /usr/local/lib/libvirt.so.0: version `LIBVIRT_PRIVATE_0.9.12' not found (required by /usr/sbin/libvirtd) failed! What me do? -- С уважением, Евгений. Тел: +79060665574 ICQ: 380264507

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[libvirt-users] virsh snapshot-create and blockcopy
by Thomas Stein 10 Jun '13

10 Jun '13

Hello. I just tried the following: virsh dumpxml --security-info gentoo-template > gentoo-template.xml virsh snapshot-create gentoo-template virsh undefine gentoo-template virsh blockcopy gentoo-template vda /opt/virt-backup-blockcopy/gentoo-template/gentoo-template.qcow2 --wait --verbose --finish virsh define gentoo-template.xml virsh snapshot-delete gentoo-template --current But if i restore the /opt/virt-backup-blockcopy/gentoo-template/gentoo-template.qcow2 the snapshot is gone. Someone has an idea what i'm missing? I suppose i'm just missunderstandig the snapshot mechanism. thanks an best regards t.

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[libvirt-users] Pools are not persistent
by Daniel Bareiro 10 Jun '13

10 Jun '13

Hi all! I'm trying virt-manager on Debian Wheezy and I noticed that it has already defined a "default" pool. But if I run: # /etc/init.d/libvirt-bin restart I lose the definition of the pools. Actually, there are the definitions of the pools; but these are not read after restarting libvirt. ss01:/etc/libvirt/storage# ls -l total 8 drwxr-xr-x 2 root root 4096 jun 1 09:36 autostart -rw------- 1 root root 664 jun 1 13:46 default.xml ss01:/etc/libvirt/storage/autostart# ls -l total 0 lrwxrwxrwx 1 root root 32 may 24 07:24 default.xml -> /etc/libvirt/storage/default.xml After restart libvirt: virsh # pool-list Name State Autostart ----------------------------------------- This is what I see in libvirtd.log: 2013-06-02 01:05:29.709+0000: 19289: info : libvirt version: 0.9.12 2013-06-02 01:05:29.709+0000: 19289: error : virStorageDefParsePerms:613 : XML error: malformed owner element 2013-06-02 01:05:30.210+0000: 19289: error : virExecWithHook:424 : Cannot find 'pm-is-supported' in path: No existe el fichero o el directorio 2013-06-02 01:05:30.211+0000: 19289: warning : qemuCapsInit:949 : Failed to get host power management capabilities 2013-06-02 01:05:33.014+0000: 19289: error : virExecWithHook:424 : Cannot find 'pm-is-supported' in path: No existe el fichero o el directorio 2013-06-02 01:05:33.014+0000: 19289: warning : lxcCapsInit:77 : Failed to get host power management capabilities 2013-06-02 01:05:33.025+0000: 19289: error : virExecWithHook:424 : Cannot find 'pm-is-supported' in path: No existe el fichero o el directorio 2013-06-02 01:05:33.025+0000: 19289: warning : umlCapsInit:87 : Failed to get host power management capabilities could this be due to some type of error in the XML file that defines the pool? ss01:/etc/libvirt/storage# cat default.xml  <pool type='dir'> <name>default</name> <uuid>3174232f-3d63-3167-aa25-3949671bf4c2</uuid> <capacity unit='bytes'>0</capacity> <allocation unit='bytes'>0</allocation> <available unit='bytes'>0</available> <source> </source> <target> <path>/var/lib/libvirt/images</path> <permissions> <mode>0700</mode> <owner>4294967295</owner> <group>4294967295</group> </permissions> </target> </pool> These are the versions of the packages I'm using: libvirt-bin: 0.9.12-11 (Architecture: i386) virt-manager: 0.9.1-4 (Architecture: all) Thanks in advance for your reply. Regards, Daniel -- Daniel Bareiro - GNU/Linux registered user #188.598 Proudly running Debian GNU/Linux with uptime: 21:50:39 up 17 days, 8:14, 12 users, load average: 0.00, 0.04, 0.00

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[libvirt-users] libvirt_lxc and sysfs
by pr.G 10 Jun '13

10 Jun '13

Hello. Is it possible to start container via libvirt_lxc without mounting /sys inside container? When I start container via lxc-start and do not add mount point to config, then /sys inside container is empty. When I do it via virsh -c lxc:// container.xml, then /sys contains sysfs of the host and /sys on host becomes remounting read-only. Am I doing something wrong or is this feature of libvirt_lxc? Thanks. root@host:~# uname -a Linux host 3.2.0-4-amd64 #1 SMP Debian 3.2.41-2+deb7u2 x86_64 GNU/Linux root@host:~# cat /etc/os-release PRETTY_NAME="Debian GNU/Linux 7.0 (wheezy)" ... root@host:~# dpkg -l | grep libvirt ii libvirt-bin 0.9.12-11 amd64 programs for the libvirt library ii libvirt0 0.9.12-11 amd64 library for interfacing with different virtualization systems container.xml: <domain type='lxc'> <name>ns1</name> <memory>524288</memory> <os> <type>exe</type> <init>/sbin/init</init> </os> <vcpu>1</vcpu> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/lib/libvirt/libvirt_lxc</emulator> <filesystem type='mount'> <source dir='/var/lxc/ns1/rootfs'/> <target dir='/'/> </filesystem> <interface type='bridge'> <source bridge='br0'/> <mac address='52:54:00:de:74:06'/> </interface> <console type='pty' /> </devices> </domain>

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[libvirt-users] transient domains with saved state of persistent doamin
by Alexandr 09 Jun '13

09 Jun '13

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Good day, i writing testing system and want to use libvirt for it, now i reading libvirt development guide and found info about transient domains which looks like what i need, but it's still unclear for me if it possible to implement what i want using libvirt. my idea is to make persistent domain, prepare it for testing (install os, needed software, drivers, e.t.c.), save it's state when system are running (for quick start later) and after this use this saved state with new transient domain which use new hard drive image with backing store instead of snapshot (qcow2 allow this) -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.20 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBAgAGBQJRtMPuAAoJEH3ap8veG8EH6B4IAKpRbXjphIYEhD5achPTyu/T vIN7SPV1NaYhZpdwmQmspcOLXgawHuCP2gMYgJkXhH+/p1d/MXQXXWX77a/8WS9t Lajuin3yG9F1Bq/1EoCNFZtARMtWvimAXeq4KMUKeNrVqrU+WPZ5/a0m6kN7xAOe wErFMnvpiefIysOb3Z0WWvwMuyPfjzZKehkYM03NyVec/1K//jXzNNvjBFUylvXX Sz5EcNGr6/SN23uS218GVPJzb+uM6ZlmIvxsxs30+AWK+r8DW/9imvhTXqnbLiJV TaTAwMekCwqs0xqRf9yk8mTI6dXt5nfnMAAUpMcinaIGMn9/oZFpDq0K2L6C5L8= =bWmZ -----END PGP SIGNATURE-----

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[libvirt-users] Setting RBD cache parameters for libvirt+qemu
by John Nielsen 08 Jun '13

08 Jun '13

I am running some qemu-kvm virtual machines via libvirt using Ceph RBD as the back-end storage. Today I was testing an update to libvirt-1.0.6 on one of my hosts and discovered that it includes this change: [libvirt] [PATCH] Forbid use of ':' in RBD pool names ...People are known to be abusing the lack of escaping in current libvirt to pass arbitrary args to QEMU. I am one of those people--I have been storing colon-separated arguments in my disk source 'name' attribute to control the RBD cache settings on a per-volume basis. Under libvirt-1.0.6 such VM's refuse to start: error: Failed to start domain foo error: unsupported configuration: ':' not allowed in RBD source volume name 'mypool/foo:rbd_cache_size=268435456:rbd_cache_max_dirty=134217728:rbd_cache_target_dirty=33554432:rbd_cache_max_dirty_age=5' So my question is how do I control the cache settings now? Thanks, JN

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[libvirt-users] [offtopic] OpenNebulaConf2013: Extended keynote lineup and deadline for talk proposals
by Javier Fontan 05 Jun '13

05 Jun '13

Hello, I hope you don't find this email too offtopic. We have just published an expanded keynote line-up for the OpenNebula Conference 2013 (http://blog.opennebula.org/?p=4707) that includes experts from leading institutions using OpenNebula. The first ever OpenNebula Conference will be held on Sept. 24-26 in Berlin and is intended to serve as a meeting point for OpenNebula cloud users, developers, administrators, builders, integrators and researchers. As you may know OpenNebula uses libvirt to manage KVM and VMware VMs and some of you may be using it in production. I think your experiences will be very valuable. There are only 10 days left to submit talk proposals (the deadline is June 15th). We are looking forward to welcoming you personally in Berlin!. Cheers -- Join us at OpenNebulaConf2013 in Berlin from the 24th to the 26th of September 2013! Javier Fontán Muiños Project Engineer OpenNebula - The Open Source Toolkit for Data Center Virtualization www.OpenNebula.org | jfontan(a)opennebula.org | @OpenNebula

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[libvirt-users] a problem about nested vm
by denghuancong 05 Jun '13

05 Jun '13

hi, I have a problem that confuse me so long. I run a guest os(VM1) on a physical machine(PM1) that had enabled virtualization . Now, I also want to run a guest os (VM2) under VM1,but VM1 print the following message to me: [2013-06-05 10:43:04,379][ERROR] machine:init_vm(57271)|state:init_vm|Create domain failed, unsupported configuration: Domain requires KVM, but it is not available. Check that virtualization is enabled in the host BIOS, and host configuration is setup to load the kvm modules.[2013-06-05 10:43:04,382][ERROR] machine:init_vm(57271)|state:init_vm|Create domain failed, unsupported configuration: Domain requires KVM, but it is not available. Check that virtualization is enabled in the host BIOS, and host configuration is setup to load the kvm modules.[2013-06-05 10:43:04,409][ERROR] machine:init_vm(57271)|state:init_vm|Create domain failed, unsupported configuration: Domain requires KVM, but it is not available. Check that virtualization is enabled in the host BIOS, and host configuration is setup to load the kvm modules.[2013-06-05 10:43:04,412][ERROR] machine:init_vm(57271)|state:init_vm|Create domain failed, unsupported configuration: Domain requires KVM, but it is not available. Check that virtualization is enabled in the host BIOS, and host configuration is setup to load the kvm modules.[2013-06-05 10:43:04,414][ERROR] machine:init_vm(57271)|state:init_vm|Create domain failed, unsupported configuration: Domain requires KVM, but it is not available. Check that virtualization is enabled in the host BIOS, and host configuration is setup to load the kvm modules.[2013-06-05 10:43:04,418][ERROR] machine:init_vm(57271)|state:init_vm|Create domain failed, unsupported configuration: Domain requires KVM, but it is not available. Check that virtualization is enabled in the host BIOS, and host configuration is setup to load the kvm modules.[2013-06-05 10:43:04,421][ERROR] machine:init_vm(57271)|state:init_vm|Create domain failed, unsupported configuration: Domain requires KVM, but it is not available. Check that virtualization is enabled in the host BIOS, and host configuration is setup to load the kvm modules.[2013-06-05 10:43:04,426][ERROR] machine:init_vm(57271)|state:init_vm|Create domain failed, unsupported configuration: Domain requires KVM, but it is not available. Check that virtualization is enabled in the host BIOS, and host configuration is setup to load the kvm modules.[2013-06-05 10:43:04,428][ERROR] machine:init_vm(57271)|state:init_vm|Create domain failed, unsupported configuration: Domain requires KVM, but it is not available. Check that virtualization is enabled in the host BIOS, and host configuration is setup to load the kvm modules.[2013-06-05 10:43:04,432][ERROR] machine:init_vm(57271)|state:init_vm|Create domain failed, unsupported configuration: Domain requires KVM, but it is not available. Check that virtualization is enabled in the host BIOS, and host configuration is setup to load the kvm modules. so, how can i enable the virtualization option in vm1??? thanks a lot. :)

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[libvirt-users] libvirt tls error
by yue 03 Jun '13

03 Jun '13

centos6.3,libvirt 0.9.10. [root@ovirtdev private]# virsh -c qemu+tls://ovirtdev.localhost/system list 2013-04-22 03:37:09.362+0000: 9898: info : libvirt version: 0.9.10, package: 21.el6_3.8 (CentOS BuildSystem <http://bugs.centos.org>, 2013-01-28-19:24:16, c6b10.bsys.dev.centos.org) 2013-04-22 03:37:09.362+0000: 9898: warning : virNetClientIncomingEvent:1665 : Something went wrong during async message processing error: Unable to read TLS confirmation: Input/output error error: failed to connect to the hypervisor thanks

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[libvirt-users] About the change of a VM's vcpu count in runtime?
by Dennis Chen 02 Jun '13

02 Jun '13

Hi, We know that there is a command "setvcpus" in virsh used to "change number of virtual CPUs", now we just have the need to change vcpu count dynamically for a running VM, so I tried this command (the vcpu count is 2 in the VM xml file), below is the result: virsh # setvcpus 3 --count 4 error: invalid argument: requested vcpus is greater than max allowable vcpus for the domain: 4 > 2 virsh # setvcpus 3 --count 1 error: Operation not supported: qemu didn't unplug the vCPUs properly So I tried another way: log into the running VM, and "echo 0 > /sys/devices/system/cpu/cpu1/online", after that I can find only one processor in the vm through '/proc/cpuinfo', but in virsh, the vcpuinfo still shows: virsh # vcpuinfo 3 VCPU: 0 CPU: 0 State: running CPU time: 13.5s CPU Affinity: yyyy VCPU: 1 CPU: 1 State: running CPU time: 6.9s CPU Affinity: yyyy So the question is: is there any method I can't find yet to change the vcpu count of a running vm dynamically? BRs, Dennis

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[libvirt-users] Using source installed open vswitch with libvirt(or virsh).
by 황진환 31 May '13

31 May '13

P{font-size:10pt; line-height:16; margin-left:0; margin-top:0; margin-right:0; margin-bottom:0; font-family:gulim;} (English is not my first language Sorry for my poor English )   OS :  Linux nc233 2632-220171el6x86_64 #1 SMP Tue May 15 17:16:46 CDT 2012 x86_64 x86_64 x86_64 GNU/Linux CentOS release 63 (Final) open vswitch : 11190 virsh : 100 ibvirtd (libvirt) : 100   I have tried to see what the virsh setting can do to open vswitch(ovs) until now I had installed open vswitch from a source, not by using rpm or rpm build of the source (I had tried to do 'ovs rpm build' described at INSTALLRHEL included in ovs, But i failed to do it)   What i tried is this(http://blogscottloweorg/2012/11/07/using-vlans-with-ovs-and-libvirt/)  I installed and started up ovs and it looked like properly working I could create and delete bridges and ports with 'ovs-vsctl'    1 what i created before running 'virsh net-define'  -------------------------------------------- # ovs-vsctl show 76d9d6aa-cfce-4868-bf99-7d16bcfe38eb     Bridge "br0"         Port "br0"             Interface "br0"                 type: internal         Port "eth1"             Interface "eth1" --------------------------------------------     2 And then runned 'virsh net-define netxml' 'netxml' i used -------------------------------------------- <network>     <name>ovs-network</name>     <forward mode='bridge'/>     <bridge name='br0'/>     <virtualport type='openvswitch'/>     <portgroup name='vlan-01' default='yes'>     </portgroup>     <portgroup name='vlan-02'>         <vlan>         <tag id='2'/>         </vlan>     </portgroup>     <portgroup name='vlan-03'>         <vlan>         <tag id='3'/>         </vlan>     </portgroup>     <portgroup name='vlan-all'>         <vlan trunk='yes'>         <tag id='2'/>         <tag id='3'/>         </vlan>     </portgroup> </network> --------------------------------------------     3 vmxml which was used for 'virsh define vmxml' -------------------------------------------- <domain type="kvm">     <name>vm</name>     <memory>1048576</memory>     <vcpu>1</vcpu>     <os>         <type arch="x86_64" machine="pc">hvm</type>                 <boot dev="hd"/>     </os>     <features>         <acpi/>         <apic/>         <pae/>     </features>     <clock mode="localtime">         <timer name="rtc" tickpolicy="catchup" wallclock="guest"/>         <timer name="hpet" present="no"/>     </clock>     <devices>                  <emulator>/usr/bin/qemu-system-x86_64</emulator>                  <disk device="disk" type="file">                          <driver cache="writeback" io="threads" name="qemu" type="qcow2"/>             <source file="/root/img/vmimg"/>             <target bus="virtio" dev="vda"/>         </disk>         <interface type="network">             <mac address="d2:0d:45:a3:92:ea"/>             <source network='ovs-network' portgroup='vlan-02'/>         </interface>         <console type="pty">             <target port="0"/>         </console>         <input bus="usb" type="tablet"/>         <input bus="ps2" type="mouse"/>         <graphics autoport="yes" keymap="en-us" listen="0000"             port="-1" type="vnc"/>     </devices> </domain> --------------------------------------------     4 runned 'virsh start vm', and failed (messages had not been printed in english at my server, so i googled and tried to choose simillar sentecne which were shown in libvirt related threads please consider it) ----------------------------------------- #virsh start vm error : Failled to start domain vm error : Unable to add port vnet0 to OVS bridge br0 -----------------------------------------     At that time, /var/log/libvirt/libvirtdlog  (these are also translated) ----------------------------------------- 2013-05-23 04:32:14588+0000: 11455: error : virNetDevGetMTU:343 : Cannot get interface MTU on 'ovsbr0': No such device  2013-05-23 04:32:14678+0000: 11455: error : virExecWithHook:419 : Cannot find 'ovs-vsctl' in path: No such file or directory 2013-05-23 04:32:14679+0000: 11455: error : virNetDevOpenvswitchRemovePort:173 : Unable to delete port (null) from OVS: command does not allowed -----------------------------------------     I think above errors comes from install location of OVS as written in libvirtdlog How can i solve that by hands? (I'm also trying to solve the problem by installing ovs, using rpm build) There are not only fedora or ubuntu linux, so the solution may exist Are there a way to get libvirt to recognize ovs-vsctl? (As i mentioned above, ovs-vsctl and ovs are properly working)   Thank you for reading

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[libvirt-users] /dev/tty only on a new container
by Sebastien Douche 31 May '13

31 May '13

Hi folks :), I migrated the host from the Debian Squeeze to Ubuntu 12.10. Old containers work but I can't use the ssh command, /dev/tty is missing. On a new container, /dev/tty is here. The libvirt configuration is the same. Any ideas? Thanks. -- Sebastien Douche <sdouche(a)gmail.com> Twitter: @sdouche / G+: +sdouche

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[libvirt-users] iSCSI-based Storage Pool and virsh attach-device problems/questions
by Ken Stanley 31 May '13

31 May '13

Hello all, I am attempting to use the 'virsh attach-device' command to add storage to a guest from a pre-defined iSCSI-based storage pool. My desire is to attach a volume from the storage pool and have the storage pool recognize that the volume is in use and either flag it as such, or remove it from the pool so that subsequent queries to the pool will only return available storage volumes. The end goal is to have an automated system use the libvirt API assign storage volumes to new and existing guests on demand. I guess my first question is: Is this possible? Does libvirt give any indication that a storage volume within a pool is available or already in use? I would prefer to avoid having to externally manage this sort of thing if I can. I am using Debian Wheezy for the Dom0 and iSCSI SAN (identical setup), along with libvirt 1.0.5-2 from the experimental branch. I have Xen 4.1.4-3+deb7u1 installed, along with its accompanying packages. All of this is currently running under VirtualBox, but that is only for my testing/development purposes. I am able to get the Dom0 to recognize the SAN, and add the storage pool. When I attempt to use 'virsh attach-device', I get the following error: "error: Failed to attach device from device.xml \ error: POST operation failed: xend_post: error from xen daemon: (xend.err 'Block device must have physical details specified')". I have tracked this specific error down to the Xen python blkif.py, located under /usr/lib/xen-4.1/lib/python/xen/xend/server/blkif.py for my installation. After reading through the source, I found that under the getDeviceDetails def there is a non-existent configuration called 'uname' that is undefined. Looking deeper into the code, under the getDeviceConfiguration def, I see that the code is trying to read from the backend configuration, and expecting to see a 'type' and 'params' to use for setting the aforementioned 'uname' value. This is where I hit the wall, so to speak. After reading through the XML documentation for libvirt (http://libvirt.org/formatdomain.html#elementsDisks) I see nothing that I can further add to my XML description that would make sense for adding a volume from a storage pool. For kicks and giggles, I've tried using the disk type 'carom', which gets me past the failing python condition, but then gives me the following error when trying to do anything – in this case, just a simple dumpxml on the domain – with the guest through virsh: "error: internal error domain information incomplete, vbd has no src". Subsequently, if I try to call 'detach-device', I get the same error, leaving me with no other alternative but to destroy/undefine, and recreate the domain using define/start. I am able to ssh into the guest after the call to 'attach-device', but no device is present nor registered (as seen with dmesg). If I reboot the guest libvirt reports that the guest is "idle", but I cannot console into it due to the error mentioned in the previous paragraph. I can, however, use 'xm console <guest>' and gain access that way. Any and all advice that you can give would be greatly appreciated. I will do everything that I can to assist as far as trying all suggestions and following directions. :) Storage Pool XML: <pool type="iscsi"> <name>virtimages</name> <source> <host name="hv02.kstanley.vm"/> <device path="iqn.2013-05.vm.kstanley.hv02:vdisks"/> </source> <target> <path>/dev/disk/by-path</path> </target> </pool> Device XML: <disk type="volume" device="disk"> <source pool="virtimages" volume="unit:0:0:1"/> <target dev="xvdb" bus="virtio"/> </disk> Regards, Ken Stanley

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[libvirt-users] Does Set Block IO tune take effect in the same session.
by vikrant verma 31 May '13

31 May '13

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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[libvirt-users] Enable bios useserial=yes from command line
by Knightmare 31 May '13

31 May '13

Hi Guys, I'm currently learning KVM and have set up an Ubuntu 12.04.2 VM running KVM. I am using the following command to provision a VM: virt-install --connect qemu:///system --ram "$ramsize" -n "$vmname" --boot network,hd,menu=on --os-variant="$variant" --disk path=/var/lib/libvirt/images/"$vmname".qcow2,device=disk,bus=virtio,format=qcow2 --mac= --cpu host --vcpus="$numcpus" --graphics none --noautoconsole --import But cannot seem to find a way to enable bios useserial=yes without issuing a virsh edit $vmname I've tried --extraargs= but that appears to be for kernel command lines, which is not what I want to achieve here. I'm looking for a way to enable serial BIOS from the point the VM is created. The current solution I am using is to do virsh destroy $vmname ; virsh edit $vm_name ; virsh start $vm_name which is not great, but gets the job done. My versions are as follows: Ubuntu 12.04.2 x86_64 kernel 3.2.0-39-generic libvirt 0.9.8-2ubuntu17.8 qemu-kvm 1.0+noroms-0ubuntu14.8 Thanks, Robert

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[libvirt-users] Question, how to coorelate snapshot ID's to the files that they represent?
by vonNieda, Adam (USMS) 30 May '13

30 May '13

Hi folks, first post :) I'm running Redhat 6 x64 with ibvirt-0.10.2-18 and qemu-img-rhev-0.12.1.2-2.355 My question is, if I do something like the following.. [root@testbox ~]# virsh snapshot-list STIGtest Name Creation Time State ------------------------------------------------------------ 1369421485 2013-05-24 13:51:25 -0500 disk-snapshot 1369768781 2013-05-28 14:19:41 -0500 disk-snapshot 1369920434 2013-05-30 08:27:14 -0500 disk-snapshot 1369920574 2013-05-30 08:29:34 -0500 disk-snapshot 1369920859 2013-05-30 08:34:19 -0500 disk-snapshot 1369920888 2013-05-30 08:34:48 -0500 disk-snapshot 1369921298 2013-05-30 08:41:38 -0500 disk-snapshot Is there another command I can issue to get the OS snapshot file that one of those snapshot names represents? Thanks very much! -Adam -- Adam vonNieda JMIS technical support Capgemini Government Solutions JPATS Kansas City Desk 816-467-1935

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[libvirt-users] Virsh with CPU features on XML file not working!
by Antonio Colín 30 May '13

30 May '13

Hello, Does anyone have masked their CPU flags with Libvirt?? It's because I have done so with Libvirt and Virsh compare / baseline. But when I boot the DomU I see the same flags as if I hadn't declare de <cpu> tag containing the features just as is described in: http://libvirt.org/formatdomain.html#elementsCPU I posted here my XML file definition: http://pastebin.com/ze5wvSZt I would be really grateful if someone shared your domain XML definition with me or tell me the syntax. I've been struggling for hours, just you know, following the documentation available but there is no functionality for me yet. Thank you a lot! Antonio Colín.

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[libvirt-users] “Unable to connect to libvirt” (xen, xl toolstack, and virt-manager)
by Gizmo Chicken 30 May '13

30 May '13

I get “Unable to connect to libvirt” when using virt-manager in combination with the XL toolstack and Xen 4.2.1. (No problems when using virt-manager in combination with the XM toolstack.) More details of the situation can be found in a bug-report that I filed on launchpad. Please see: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1180281 Judging from the information that I provided in the above referenced bug-report (some of which is copied below), does this appear to be an actual bug? Or have I failed to configure something properly? Thanks for any help with this! Best regards, GizmoChicken P.S. Here is more of the error that I get when attempting to start virt-manager: Unable to connect to libvirt. unable to connect to 'localhost:8000': Connection refused Verify that: - A Xen host kernel was booted - The Xen service has been started Libvirt URI is: xen:/// Traceback (most recent call last): File "/usr/share/virt-manager/virtManager/connection.py", line 1027, in _open_thread self.vmm = self._try_open() File "/usr/share/virt-manager/virtManager/connection.py", line 1009, in _try_open flags) File "/usr/lib/python2.7/dist-packages/libvirt.py", line 102, in openAuth if ret is None:raise libvirtError('virConnectOpenAuth() failed') libvirtError: unable to connect to 'localhost:8000': Connection refused And here the output from var/log/libvirt/libvirtd.log 2013-05-18 05:44:47.614+0000: 1304: info : libvirt version: 1.0.5 2013-05-18 05:44:47.614+0000: 1304: error : xenHypervisorDoV2Sys:1006 : Unable to issue hypervisor ioctl 3166208: Permission denied 2013-05-18 05:44:47.615+0000: 1304: error : xenHypervisorDoV2Sys:1006 : Unable to issue hypervisor ioctl 3166208: Permission denied 2013-05-18 05:44:47.617+0000: 1304: error : xenHypervisorDoV2Sys:1006 : Unable to issue hypervisor ioctl 3166208: Permission denied 2013-05-18 05:44:47.618+0000: 1304: error : xenHypervisorDoV2Sys:1006 : Unable to issue hypervisor ioctl 3166208: Permission denied 2013-05-18 05:44:47.618+0000: 1304: error : xenHypervisorDoV2Sys:1006 : Unable to issue hypervisor ioctl 3166208: Permission denied 2013-05-18 05:44:47.619+0000: 1304: error : xenHypervisorDoV2Sys:1006 : Unable to issue hypervisor ioctl 3166208: Permission denied 2013-05-18 05:44:47.635+0000: 1304: error : do_connect:103 : internal error failed to connect to xend 2013-05-18 05:44:47.636+0000: 1304: error : xenDaemonOpen_tcp:700 : unable to connect to 'localhost:8000': Connection refused 2013-05-18 05:45:13.647+0000: 1289: error : virNetSocketReadWire:1362 : Cannot recv data: Connection reset by peer

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[libvirt-users] Trouble running LXC through libvirt
by Shashank Sahni 29 May '13

29 May '13

Hi everyone, I followed the instructions here to create ubuntu lxc containers. https://help.ubuntu.com/12.04/serverguide/lxc.html#lxc-admin I then copied the rootfs to /var/lib/libvirt/images/precise and booted it as an "operating system container" through virt-manager. Here are the incidents. - It immediately showed on console "init: unable to create /dev/kmsg" but after a while it booted. - I had modified the image to allow static password for user ubuntu and I logged in. But to my surprise I wasn't able to use sudo. The error was "sudo: setuid is not set" I've tried this image on lxc and it works like a charm. But there seems to be some issue with libvirt. Some help would be greatly appreciated. -- Shashank Sahni

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[libvirt-users] Help needed regarding "virsh cpu-stats test_vm"
by Anusha Rayani 29 May '13

29 May '13

Hi, We are implementing feature called CPU separation in the platform. So, guest VMs will have dedicated cores allocated using cgroups (cgroups hierachy related VMs managed by libvirt). virsh cpu-stats command is not working in our platform : virsh # cpu-stats test_vm error: Failed to virDomainGetCPUStats() error: Requested operation is not valid: cgroup CPUACCT controller is not mounted It should show info like this. $ virsh cpu-stats test_vm CPU0: cpu_time 0.025812184 seconds vcpu_time 0.025812184 seconds CPU1: cpu_time 4.893484927 seconds vcpu_time 4.893484927 seconds Total: cpu_time 4.924620941 seconds user_time 1.060000000 seconds system_time 3.050000000 seconds We are suspecting some issue in virsh when it is trying to find to where that cgroups is mounted in a system (default in ubuntu is /sys/fs/cgroup/cpuset/libvirt/, but in our platform uses /dev/cgroup_xxx). Find /proc/cgroups and /proc/mounts log below: ================================== # cat /proc/cgroups #subsys_name hierarchy num_cgroups enabled cpuset 0 1 1 ns 0 1 1 cpu 1 3 1 cpuacct 0 1 1 memory 2 1 1 freezer 0 1 1 net_cls 0 1 1 blkio 0 1 1 # cat /proc/mounts cpu /dev/cgroup_cpu cgroup rw,relatime,cpu 0 0 memory /dev/cgroup_mem cgroup rw,relatime,memory 0 0 Can you please help us in this regard to enable this command in our platform, Thanks in advance !!! Regards, Anusha

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[libvirt-users] Usual number of guests on a host
by Parakkal, Navin S 28 May '13

28 May '13

Hi, Can someone tell us what is the usual number of guests on a typical host in a production environment ? Has someone tested this ? What number does it scale to ? We have around 150 per host running fine. Regards, Navin

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[libvirt-users] libvirt for Citrix XenServer
by Parakkal, Navin S 28 May '13

28 May '13

Hi, Can someone send me the build steps how to build for Citrix XenServer ? I want to build a version of libvirt for Citrix XenServer. Regards, Navin

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