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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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