August 2011 - Users - libvirt List Archives

[libvirt-users] converting save/dump output into physical memory image
by Andrew Tappert 04 Jun '12

04 Jun '12

A lot of people in the security community, myself included, are interested in memory forensics these days. Virtualization is a natural fit with memory forensics because it allows one to get access to a guest's memory without having to introduce any extra software into the guest or otherwise interfere with it. Incident responders are particularly interested in getting memory dumps from systems they're investigating. Virsh has "save" and "dump" commands for storing the state of a guest to a file on disk, but memory of KVM guests doesn't get saved in the "standard" input format for memory forensics tools, which is a raw physical memory image. (This is what you'd get via the classical "dd /dev/mem" approach or the contemporary equivalent using the crash driver; and VMware Server and Workstation produce .vmem files, which are such raw physical memory images, when a guest is paused or snapshotted.) In order to analyze the memory of Libvirt/KVM guests with my Linux memory forensics software, Second Look, I've created a tool for converting Libvirt-QEMU-save files (output of virsh save command) or QEMU-savevm files (output of virsh dump command) to raw physical memory images. I've got a basic working capability, though I'm still tracking down some problems with a guest allocated 8GB RAM--not all the memory seems to be present in the save or dump file. And I haven't tested very extensively yet, version support is limited to what I myself am currently running, etc. I'd like to know if this is a capability that others are interested in. Is this something that would be of interest to the Libvirt project if I were to contribute the code, or to the KVM project, or do you think it best exists as a separate project? I've also got a proof-of-concept tool for converting hibernate images to raw physical memory images. Perhaps a collection of tools for converting various memory dump formats would be a good project. Anyone else interested in this kind of stuff? As an author of commercial memory forensics software I've got a vested interest in availability of good memory acquisition capabilities. But there are a number of people working on FOSS Linux memory analysis tools, too... Andrew

4 5

Re: [libvirt-users] ruby-libvirt 0.4.0
by Chris Lalancette 09 Nov '11

09 Nov '11

On 07/29/11 - 09:34:17AM, David M. Barlieb wrote: > Hi, I'm fairly new to using libvirt. I have RHEL6 servers running KVM > virtual environment. As I understand it, libvirt provides the tools to > the KVM environment so that I can create domains or virtual guests. So, > that being said, what does this ruby-libvirt provide me or enhance given > my current setup. > > > > I'll understabnd if this is a little rudimentary but I really do not > know who or where else to ask these types of question. I get quite a bit > of email from the libvirt-users groups about libvirt and really have no > idea if I can or should put any of these into my current setup, or if I > should be asking RedHat this. > > > > I certainly wouldn't mind testing and contributing to these effort to > enhance the libvirt tools and KVM hypervisor but think I need a better > understanding of exactly how libvirt and KVM interact and what the > enhancements bring to the table. In the future it is usually best to keep one of the lists on an email; that way, if I'm away or not responding, someone else can help you. I've added libvirt-users to this response. In any case, you have the right idea. Libvirt is a control plane for various different virtualization solutions. Arguably the most popular virtualization solution that libvirt can control is KVM, but it can also manage Xen, VMware ESX, LXC (linux containers), UML, etc. Libvirt provides both tools (like virsh and libvirtd) and APIs for interacting with virtual machines. The APIs are things like virDomainShutdown(), virDomainReboot(), etc. The ruby-libvirt package is a thin wrapper around these APIs, so that you can use this functionality from ruby programs. That is, you would be able to do something like: dom.reboot dom.shutdown from your ruby programs. There are also bindings for other languages such as python, php, and perl. There is a lot more information at http://libvirt.org, and there is more information specifically about the ruby bindings at http://libvirt.org/ruby -- Chris Lalancette

3 2

[libvirt-users] CPU Model detection with virsh capabilities
by Olivier BONHOMME 09 Sep '11

09 Sep '11

Hello everybody, I am a new user discovering libvirt with KVM software. During my first VM creation, I saw an issue with virsh that I can't understand. I wanted to emulate another CPU than the classical qemu32 using virsh. So I used the virsh capabilites command to detect how is detected my CPU host which is an Intel Xeon E5410 and my problem is that this CPU is detected only with the cpumodel "pentium3". But if use the kvm -cpu ? command, it returns me the following capabilities : $ kvm -cpu ? x86 qemu64 x86 phenom x86 core2duo x86 kvm64 x86 qemu32 x86 coreduo x86 486 x86 pentium x86 pentium2 x86 pentium3 x86 athlon x86 n270 Moreover, if i decide to use the pentium3 cpumodel for my KVM VM, the CentOS freeze during its loading. My libvirt and kvm are the following on a Debian Squeeeze : $ virsh version Compiled against library: libvir 0.8.3 Using library: libvir 0.8.3 Using API: QEMU 0.8.3 Running hypervisor: QEMU 0.12.5 Does anybody already had the same issue or am I doing anything wrong ? Thanks for your answers Regards, Olivier BONHOMME

2 2

[libvirt-users] RAID1 over IP?
by David Ehle 05 Sep '11

05 Sep '11

I asksed about this in November last year but got on response. Anyone have any ideas now? Does anyone here have any experience with using KVM/libvirt with RAID1 over IP/DRBD or other HA solution? I'm trying to figure out the hardware configuration I would need to be able to survive a failure or planned shutdown of any one unit in a virtualization cluster. KVM/libvirt makes moving running VM's from one host to another a no brainer, but I'm trying to figure out the right way to be able to take a the storage backend for maintenance without disrupting the VMs. Right now I'm thinking something like KVM + libvirt + heartbeat/corosync + pacemaker + DBRM on Ubuntu 10.04 with 3 or 4 nodes - 2 hosts, 2 storage, or 1 host, 1 host + storage, 1 storage. Any thoughts? Thanks!

3 5

[libvirt-users] New with Libvirt and having problems.
by Kevins Thoughts 30 Aug '11

30 Aug '11

Hi all. I've been playing around with KVM for a bit now and have several virtual machines up and running. Having passed what I considered "first look" stage, I'm ready to start using libvirt as a manager. For reference, pre-libvirt, I have started this VM with: /kvm -net nic,model=virtio -net tap,ifname=tap5,script=no -drive file=test1.img,if=virtio,boot=on -curses -no-reboot -m 1g -smp 2/ I have a test environment I like to play with, and created the initial domain XML using virt-install: /virt-install --name "Test" --ram 1024 --vcpus=2 --cpu host --description "Test VM" --import --file test1.img --os-type=linux --os-variant=virtio26 --network bridge=br0,model=virtio --graphics=none --autostart --prompt/ When I look in /var/log/libvirt/qemu/Test.log I see the VM is started with the command (edited down to the relevant parts): //usr/bin/qemu-kvm -S -m 1024 -smp 2 -name Test,process=qemu:Test -nographics -boot c -drive file=/kvms/test1.img,if=none,boot=on /This has two problems: 1) The "-S" is keeping the system from booting 2) the "if=none" needs to be "if=virtio" I've confirmed both by changing -nographics to -curses and watching what happens. For #1, its a big fat nothing (no surprise since -S turns off the CPUs), for #2 grub loads and the kernel boots, but my /dev/vda3 isn't found so "init" can't start. I'm anticipating a 3rd problem: I don't see where to specify that I want the VM to use "tap5" of my bridged network. Can some kind soul please let me know what I need to change in the domain XML file to fix these issues? Thanks, Kevin ps. I've post this to my blog at http://www.kevinsthoughts.com/2011/08/kvm-management-libvirt/ if anyone would prefer to answer there.

2 2

[libvirt-users] conflict disk error
by Paras pradhan 30 Aug '11

30 Aug '11

Hi, In one of my nodes I am getting libvirt error. -- ERROR Unknown failure Traceback (most recent call last): File "/usr/sbin/virt-install", line 895, in ? main() File "/usr/sbin/virt-install", line 677, in main options.sparse, options.nodisks, guest, ishvm, conn) File "/usr/sbin/virt-install", line 239, in get_disks is_file_path), disk, size) File "/usr/sbin/virt-install", line 239, in <lambda> is_file_path), disk, size) File "/usr/sbin/virt-install", line 202, in get_disk d = cli.disk_prompt(None, kwargs) File "/usr/lib/python2.4/site-packages/virtinst/cli.py", line 277, in disk_prompt if dev.is_conflict_disk(conn) is True: File "/usr/lib/python2.4/site-packages/virtinst/VirtualDisk.py", line 890, in is_conflict_disk xml = vm.XMLDesc(0) File "/usr/lib64/python2.4/site-packages/libvirt.py", line 247, in XMLDesc if ret is None: raise libvirtError ('virDomainGetXMLDesc() failed', dom=self) libvirtError: Unknown failure -- command used: virt-install --nographics --paravirt --name dora --ram 2048 --file /dora.img --file-size 153 --location nfs://mydom:/distributions/redhat60/x86_64/ -x "ks=http://mydom/ks/redhat60-dora.ks ip=x.x.x.x netmask=255.255.255.0 dns=x.x.x.x gateway=x.x.x.x" -b xenbr0 Ideas? Thanks Paras.

1 0

Re: [libvirt-users] New with Libvirt and having problems.
by Kevins Thoughts 30 Aug '11

30 Aug '11

> > Ah I never gave KVM or virtualization a try in Gentoo. None of my > servers have X though using X11 forwarding still works. In CentOS the > package is xorg-x11-xauth , looks like it may be x11-apps/xauth in > Gentoo. No X anywhere in my environment <smile>. Somehow I normally manage! > > Does "virsh iface-list" show tap5? Actually that command errors out: /virsh # iface-list error: Failed to list active interfaces error: this function is not supported by the connection driver: virConnectNumOfInterfaces/ > > For the disk, this is what I have for my virtio disks... > > <disk type='file' device='disk'> > <driver name='qemu' type='qcow2'/> > <source file='/vmstore/images/domain0001.qcow2'/> > *<target dev='vdb' bus='virtio'/>* > <address type='pci' domain='0x0000' bus='0x00' slot='0x06' > function='0x0'/> > </disk> My XML had the type wrong, setting it to raw. Alas, I still see the invoked KVM being passed: /-drive file=/kvms/test1.img,if=none,id=drive-virtio-disk0,boot=on,format=qcow2 / The "if=none" is the problem, it needs to be "if=virtio". KVM is also still being passed the "-S" flag as its first parameter, so the CPUs are not starting. > > Also maybe add something like this to your virt-install line... > > "--disk path=test1.img,device=disk,bus=virtio" At this point, I'm just editing the XML, its easier. Once I get one working, I can tweak for the others. Virt-install at least got me started. Kevin

1 0

[libvirt-users] Fwd: Re: New with Libvirt and having problems.
by Kevins Thoughts 30 Aug '11

30 Aug '11

On 8/29/2011 10:29 PM, Trey Dockendorf wrote: > Have you looked into using virt-manager? When I started using KVM I > found that new VM provisioning was much simpler with that interface. Alas, Virtmanager doesn't seem to be a supported program under Gentoo - the distribution I use. If its X-based, it wouldn't work anyhow - I'm strictly a command line shop. > > Once you've created your domain with "virt-install" you can make > changes using virsh. > > virsh -c qemu:///system edit Test > > That will allow you to directly edit the domain. > > In the virt-install line you used "bridge=br0" , maybe replace that > with "bridge=tap5". If that doesn't do it, once your editing the XML > you can try something like the following... I'm familiar with virsh edit and have used it to probe around a bit. Actually tried the "bridge=tap5" a few days ago and get the message: /ERROR internal error Failed to add tap interface to bridge. tap5 is not a bridge device/ > > <interface type='bridge'> > <mac address='52:54:00:4d:74:c7'/> > <source bridge='tap5'/> > <model type='virtio'/> > <address type='pci' domain='0x0000' bus='0x00' slot='0x03' > function='0x0'/> > </interface> > > That was created using virt-manager, so you probably need to use what > virt-install created for your mac address and address. Gave that a shot, attempting to create a new domain with "br0" replaced by "tap5" and got the same error message: /error: internal error Failed to add tap interface to bridge. tap5 is not a bridge device/ > > Is your init failing on /dev/vda3 and then kernel panic? If so it's > likely your guest OS doesn't have the necessary kernel modules loaded. > Depending on your distro it will vary, but using CentOS 6 I've found > they are automatically loaded. This is what's loaded in CentOS 6 Well, yes and no. Its failing with a kernel panic because KVM is being started with if=none instead of if=virtio. If I manually change it, it works fine. Just need to know where to update that in the domain XML file. For what its worth, the image runs 100% fine with started manually with: /kvm -net nic,model=virtio -net tap,ifname=tap5,script=no -drive file=test1.img,if=virtio,boot=on -curses -no-reboot -m 2g -smp 2/ So I know the image is good. > > # lsmod | grep virtio > virtio_blk 5087 5 > virtio_pci 6733 0 > virtio_ring 7169 2 virtio_blk,virtio_pci > virtio 4824 2 virtio_blk,virtio_pci > > Try changing the disk to ide , and then verifying your system is able > to load the virtio modules. > > Also , once you have your XML the way you like, if your going to stick > with command line look at using virsh though I highly recommend > virt-manager. > > I'm still very new to KVM myself, so hopefully that was of some use > > - Trey Thanks!

1 0

[libvirt-users] VMs do not start randomically during host boot
by Josir Cardoso Gomes 30 Aug '11

30 Aug '11

Hi Folks, Host: Ubuntu 10.04 64bits 3 Guests with Ubuntu 10.04 64bits Every monday, when I turn the host on, some guests starts automatically and others don´t. Every week libvirt "elects" a different guest and don´t start it. If I start it manually, it boot fine. Looking at /var/log/libvirtd, it only show the log of the guests that boot. Not a tip of the sleepy guests servers. Could somebody give me a glue on how to find the problem ? Thanks in advance, Josir.

2 1

[libvirt-users] hello, I 've deployed libvirt, and it is OK to use kvm.But when I use virtualbox, I can not attach a device to a domain
by bin liu 30 Aug '11

30 Aug '11

hello,I 've deployed libvirt, and it is OK to use kvm.But when I use virtualbox,I can not attach a device to a domain. It reports the error that can't get device from device.xml here is my xml file for device(device.xml): <disk type='block'> <driver name='phy'/> <source dev="/home/lb/iscsitest/vdisk.img"/> <target dev='sdb' bus='usb'/> </disk> and the xml file for the vm: <domain type='vbox'> <name>winxp_3D</name> <uuid>d2542bf2-3d56-41fa-a048-4f9a7ed3cf4a</uuid> <memory>787456</memory> <currentMemory>787456</currentMemory> <vcpu>1</vcpu> <os> <type arch='x86_64'>hvm</type> <boot dev='fd'/> <boot dev='cdrom'/> <boot dev='hd'/> </os> <features> <acpi/> </features> <clock offset='localtime'/> <on_poweroff>destroy</on_poweroff> <on_reboot>destroy</on_reboot> <on_crash>destroy</on_crash> <devices> <disk type='file' device='disk'> <source file='/root/VirtualBox VMs/winxp_3D/winxp_3D.vdi'/> <target dev='hda' bus='ide'/> </disk> <interface type='bridge'> <mac address='08:00:27:6f:c6:4f'/> <source bridge='tap0'/> <model type='Am79C973'/> </interface> <input type='mouse' bus='ps2'/> <graphics type='desktop' display=':0.0'/> <sound model='ac97'/> <video> <model type='vbox' vram='32768' heads='1'> <acceleration accel3d='yes' accel2d='yes'/> </model> </video> </devices> </domain>

2 1

[libvirt-users] Help!
by huachao yao 30 Aug '11

30 Aug '11

Buddy, I am a noob in libvirt develop. When I want to create a domain by using virDomainDefineXML and displays a window on the host desktop. But when I add the line " <graphics type='sdl' display=':0.0'/>" into the config xml file, the error as below will happen. libvir: QEMU error : internal error process exited while connecting to monitor: Could not initialize SDL(No available video device) - exiting when I delete " <graphics type='sdl' display=':0.0'/>",I can create the domain normally. Who can help me?! The config xml file is as below: <domain type='qemu'> <name>qemu_ubuntu_01</name> <memory>219200</memory> <currentMemory>219200</currentMemory> <vcpu>2</vcpu> <os> <type arch='x86_64' machine='pc'>hvm</type> <boot dev='hd'/> <boot dev='cdrom'/> </os> <devices> <emulator>/usr/bin/qemu</emulator> <disk type='file' device='cdrom'> <source file='/root/Downloads/ubuntu-11.04-desktop-amd64.iso'/> <target dev='hdc' bus='ide'/> <readonly/> </disk> <disk type='file' device='disk'> <source file='/var/lib/libvirt/images/winXP.img'/> <driver name='qemu' type='raw'/> <target dev='hda'/> </disk> <video> <model type='cirrus' vram='9216' heads='1'> <acceleration accel3d='yes'/> </model> </video> <interface type='bridge'> <mac address='52:54:00:d8:65:c9'/> <source bridge='virbr0'/> </interface> <input type='mouse' bus='ps2'/> <graphics type='vnc' port='10' listen='127.0.0.1'/> <graphics type='sdl' display=':0.0'/> </devices> </domain>

2 1

[libvirt-users] Xenapi - Domain Console opening & System info
by sharmila radha krishnan 29 Aug '11

29 Aug '11

Hi All,   I would like to know how to open a console of a running domain using libvirt. Looking at the code, seems that there is no support available currently. Any workarounds for this? Also how do I get the System info(Like system tot memory use/Disk info/cpu info,network info etc through libvirt. Are there any palns to support this in the future release?   Also, how to I add a new API to libvirt?   Thanks, Sharmila

1 0

[libvirt-users] Reg: Workaround to use pivot_root while using "rootfs" for "/" ?
by Alphonse Hansel Anthony 26 Aug '11

26 Aug '11

Hi All, I am trying to start a lxc container using libvirt and I am facing an issue due to pivot_root. The return code from the system call “pivot_root” is EINVAL (Invalid arguments). I isolated the issue to this specific condition check within the system call. This is an code snippet from fs/namespace.c::pivot_root * error = -EINVAL; if (root.mnt->mnt_root != root.dentry) goto out2; /* not a mountpoint */ if (root.mnt->mnt_parent == root.mnt) << this represents a circular mount reference goto out2; /* not attached */ if (new.mnt->mnt_root != new.dentry) goto out2; /* not a mountpoint */ if (new.mnt->mnt_parent == new.mnt) goto out2; /* not attached */ * This issue occurs for me, since I am using fstype "rootfs" as "/" and all binaries are mounted ISO's for execution within "/". Based on information from the below links, I have realized, that pivot_root is not possible for the above case.* **https://lkml.org/lkml/2005/10/8/17 https://bugzilla.kernel.org/show_bug.cgi?id=4857 * I would like to know , if my observations are correct and is there any workaround to overcome this issue? Any help in this regard would be useful. -Alphonse

1 1

[libvirt-users] (no subject)
by lingjiao.lc 26 Aug '11

26 Aug '11

Hi, I’ve used the libvirt and sheepdog, they are so great! But I have one question about libvirt and sheepdog. As we know, I can use this command to create a sheepdog image, #qemu-img create –f raw sheepdog:fedora15.img 40G but how can I create a pool and volume for sheepdog with the xml of libvirt ? ________________________________ This email (including any attachments) is confidential and may be legally privileged. If you received this email in error, please delete it immediately and do not copy it or use it for any purpose or disclose its contents to any other person. Thank you. 本电邮(包括任何附件)可能含有机密资料并受法律保护。如您不是正确的收件人，请您立即删除本邮件。请不要将本电邮进行复制并用作任何其他用途、或透露本邮件之内容。谢谢。

3 2

[libvirt-users] libvirt ruby binding with vmware
by Ohad Levy 24 Aug '11

24 Aug '11

Hi, I've been trying to use the ruby libvirt binding with vmware esx on F15, however it doesnt seems to work, I get: Libvirt::ConnectionError: Call to virConnectOpen failed: Cannot access CA certificate '/etc/pki/CA/cacert.pem': No such file or directory I've using the same uri with virsh and it works. it seems like somehow the no_verify is not passed, or we are back to old libvirt error messages :) any idea? thanks, Ohad

3 2

[libvirt-users] pool-refresh on iSCSI pools does not actually rescan the bus
by Guido Winkelmann 24 Aug '11

24 Aug '11

Hi, When I add a new LUN on an iscsi target and then issue a pool-refresh command on the respective storage pool in libvirt, libvirt will not find the new lun (or notice if luns have been removed). I'm using a Dell PowerVault MD3200i iSCSI Array to hold the volumes for virtual servers in libvirt. In libvirt, I have defined the storage pool as this: <pool type='iscsi'> <name>iscsi01</name> <uuid>52eb9c59-a7ac-a4e8-a26e-7ca112f0dd70</uuid> <capacity>85899345920</capacity> <allocation>85899345920</allocation> <available>0</available> <source> <host name='10.3.1.15'/> <device path='iqn.1984-05.com.dell:powervault.md3200i.6782bcb0000859f3000000004d3eec7d'/> </source> <target> <path>/dev/disk/by-id</path> <permissions> <mode>0700</mode> <owner>-1</owner> <group>-1</group> </permissions> </target> </pool> If I add a new LUN on the iSCSI array, and then issue the command "pool- refresh iscsi01", followed by "vol-list iscsi01" in virsh, the list does not contain the new volume. The only workaround I have found so far for this is to manually log in to the host server as root, do "iscsiadm -m discovery -t sendtargets -p 10.3.1.15" and then issue the pool-refresh command in libvirt. Libvirt is libvirt-0.8.3-4.fc14.x86_64 on Fedora 14. Is this supposed to work like this? If not, will a newer version fix that problem? Regards, Guido

1 0

[libvirt-users] Strange libvirt exit status 1 (LXC containers)
by Stephen Eilert 24 Aug '11

24 Aug '11

Hello, I've encountered the following error, trying to start a domain: error: internal error Child process (PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/X11R6/bin LIBVIRT_DEBUG=2 LIBVIRT_LOG_OUTPUTS=2:syslog:libvirtd /usr/libexec/libvirt_lxc --name vm_14 --console 18 --handshake 21 --background --veth veth1) status unexpected: exit status 1 I see nothing relevant in syslog, google searches have returned nothing. Starting libvirt_lxc manually seems to work (the process never returns), but of course the VMs do not start. I am at a loss on what to do next. I'm running Ubuntu 10.04, which is itself a guest system running under virtual box (host is OSX Lion). I've compiled libvirt from git (using /usr as the --prefix, after removing the OS package), LXC containers are installed from a PPA, as the default Ubuntu kernel doesn't enable network namespaces. LXC itself doesn't appear to be a problem, as I can start VMs with lxc-start. Since I required libvirt's API, using LXC directly is not desirable. Does anyone have any tips on what I should be looking for? Thanks. -- Stephen -- Domain definition follows: <domain type='lxc'> <name>vm_14</name> <uuid>9243fb5b-6b26-44af-7408-69c7f2d4ff03</uuid> <memory>262144</memory> <currentMemory>262144</currentMemory> <vcpu>1</vcpu> <os> <type arch='x86_64'>exe</type> <init>/sbin/init</init> </os> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>preserve</on_crash> <devices> <emulator>/usr/libexec/libvirt_lxc</emulator> <filesystem type='mount' accessmode='passthrough'> <source dir='/var/lib/lxc/vmpea/rootfs/'/> <target dir='/'/> <readonly/> </filesystem> <filesystem type='mount' accessmode='passthrough'> <source dir='/home/lxcadmin/repositories/14'/> <target dir='/home/lxcmaster'/> </filesystem> <interface type='network'> <mac address='52:54:00:10:7a:e7'/> <source network='default'/> <target dev='veth0'/> </interface> <console type='pty'> <target type='serial' port='0'/> </console> </devices> </domain>

1 2

[libvirt-users] migration in parallel
by Yih-Herng Chuang 23 Aug '11

23 Aug '11

Hi, We ran into various errors when tried to run migration in parallel. Does libvirt support migration in parallel? Regards, --Yih Yih-Herng Chuang IBM Center for Microsoft Technologies 3600 Carillon Point, Kirkland WA 98033 (DID) (425) 803-7285 (TIE) 977-7285 YihHerng(a)us.ibm.com

2 3

[libvirt-users] Problem to migrate virtual machine between two hosts with same uuid
by info＠umbertocarrara.it 23 Aug '11

23 Aug '11

hi at all, i'm trying to migrate a vm between two host but fails, this is what I did: virsh # start win2008 Domain win2008 started virsh # list Id Name State ---------------------------------- 1 win2008 running virsh # migrate --live win2008 qemu+ssh://host2/system error: internal error Attempt to migrate guest to the same host 00010203-0405-0607-0809-0a0b0c0d0e0f if I type on both hosts: host1 virsh # sysinfo ....... <system> <entry name='manufacturer'>Supermicro</entry> <entry name='product'>X9SCL/X9SCM</entry> <entry name='version'>0123456789</entry> <entry name='serial'>0123456789</entry> <entry name='uuid'>00010203-0405-0607-0809-0A0B0C0D0E0F</entry> <entry name='sku'>To be filled by O.E.M.</entry> <entry name='family'>To be filled by O.E.M.</entry> </system> ........ host2 virsh # sysinfo ....... <system> <entry name='manufacturer'>Supermicro</entry> <entry name='product'>X9SCL/X9SCM</entry> <entry name='version'>0123456789</entry> <entry name='serial'>0123456789</entry> <entry name='uuid'>00010203-0405-0607-0809-0A0B0C0D0E0F</entry> <entry name='sku'>To be filled by O.E.M.</entry> <entry name='family'>To be filled by O.E.M.</entry> </system> ........ The problem seems to be the same uuid on both hosts, 1) is correct? 2) if is correct, how I can resolve? Thanks a lot in advance Umberto -- ------------------------------------------ mediaus around the web Via Romana, 2143 - 55100 Antraccoli - LUCCA Web: http://www.mediaus.it Tel.: +39 (0) 583 493745/464501 Mob. +39 349.5422881 Fax.: +39 (0) 583 471420 Mailto:info@mediaus.it

4 4

[libvirt-users] pool assumed to have 512B sector
by David Cohen 23 Aug '11

23 Aug '11

Hi, When creating a dedicated storage pool on a FC attached storage with sector size of 4096B and size of 2TB, the storage pool is created but reported as 1/8 of it's size, the same follows for any volume created in the same storage pool: # virsh pool-info guest_images_disk Name: guest_images_disk UUID: 30247222-c1fb-8749-b833-a73782198d26 State: running Persistent: yes Autostart: yes Capacity: 256.00 GB Allocation: 122.07 MB Available: 255.88 GB -- David Cohen Grid Computing Physics Department Technion - Israel Institute of Technology Phone: 972-4-8293668 Fax: 972-4-8295755 Cellular: 972-54-5385664

2 3

[libvirt-users] ANNOUNCE: oz0.6.0 release
by Chris Lalancette 22 Aug '11

22 Aug '11

All, I'm pleased to announce release 0.6.0 of Oz. Oz is a program for doing automated installation of guest operating systems with limited input from the user. Release 0.6.0 is a bugfix and feature release for Oz. Some of the highlights between Oz 0.5.0 and 0.6.0 are: - The ability to specify the destination for the ICICLE output from oz-install and oz-generate-icicle - pydoc class documentation for all internal Oz classes - Automatic detection of KVM or QEMU at runtime (this allows oz to be used within virtual machines, although with a large performance hit) - Less scary warning messages in the debug output - Printing of the screenshot path when a build fails - Ability to run multiple Oz installs of the same OS at the same time - Support for OEL and ScientificLinux - Support for RHEL-5.7 - Support for CentOS 6 - Support for OpenSUSE arbitrary file injection and command execution - Ability to make the TDL (template) parsing enforce a root password - Rejection of localhost URLs for repositories (since they must be reachable from the guest operating system, localhost URLs make no sense) Fedora-14, Fedora-15, and RHEL-6 packages are available for this release. Note that to install the RHEL-6 packages, you must be running RHEL-6.1 or later. Instructions on how to get and use Oz are available at http://aeolusproject.org/oz.html If you have any questions or comments about Oz, please feel free to contact aeolus-devel(a)lists.fedorahosted.org or me (clalance(a)redhat.com) directly. Thanks to everyone who contributed to this release through bug reports, patches, and suggestions for improvement. -- Chris Lalancette

1 0

[libvirt-users] issue with virErrorInitialize
by Sharad Mishra 22 Aug '11

22 Aug '11

One of my team mate investigated the issue where libvirt-cim was segfaulting when unloading providers. More info on this issue is at https://www.redhat.com/archives/libvirt-users/2011-August/msg00069.html Here is the gist of his investigation - I've looked into the libvirt source code and the reason for issues with the unload of libvirt-cim providers is there (and cimprovider -r forces an unload, just as cimserver shutdown does). virConnectOpen() does call virInitialize() which then will initialize the gcrypt library after initializes the thread setup ->virThreadInitialize(), creates the error reporting structure ->virErrorInitialize() and initialize a random number generator ->virRandomInitialize(). The issue is hidden in virErrorInitialize(). It calls virErrorInitialize() which uses the wrapper function virThreadLocalInit(&virLastErr, virLastErrFreeData);. virThreadLocalInit() calls pthread_create() with a destructor function (virLastErrFreeData()) which will be called on thread exits. Trouble here is that pthread_key_delete() is never called in libvirt, but next time the system runs through the key list and libvirt has been unloaded the system will jump to an already unloaded function (the pointer were virLastErrFreeData() was loaded formerly) and consequently crash the process. Fixing this will not be easy, but a start would be a libvirt function on its externalize interface that allows cleanup short before library unload, or alternatively libvirt does the thread key delete on library unload. Thanks Sharad Mishra Open Virtualization Linux Technology Center IBM

1 0

[libvirt-users] How to Connect a new CD via virt-manager
by Marc Haber 22 Aug '11

22 Aug '11

Hi, I have virt-manager 0.9 connecting to a libvirtd 0.9.3 on Debian unstable. Hypervisor being used is KVM. In a VM, I can select the "IDE CDROM 1" and click on "disonnect" which makes the virtual disk disappear from the virtual drive and the former disconnect button now reads "connect". Hence, when I click there, nothing happens. Currently, the only way I am aware to get a new CD in the virtual drive is to delete it and to add a new virtual CD drive. Is this a bug, or am I doing things wrong? Greetings Marc -- ----------------------------------------------------------------------------- Marc Haber | "I don't trust Computers. They | Mailadresse im Header Mannheim, Germany | lose things." Winona Ryder | Fon: *49 621 72739834 Nordisch by Nature | How to make an American Quilt | Fax: *49 3221 2323190

1 0

[libvirt-users] Invitation to connect on LinkedIn
by Hao Pan 22 Aug '11

22 Aug '11

LinkedIn ------------ I'd like to add you to my professional network on LinkedIn. - Hao Hao Pan Student at Peking University China Confirm that you know Hao Pan https://www.linkedin.com/e/qej7u0-grmy9fff-2v/isd/3931333441/YXbn8TLa/ -- (c) 2011, LinkedIn Corporation

1 0

[libvirt-users] Detaching LVM volume from Windows guest
by mkey 20 Aug '11

20 Aug '11

Hello, I have some difficulties regarding to above title. Windows as guest OS is running on KVM(Ubuntu natty). After attaching LVM volume to guest OS and did "safely remove device" in guest windows, detaching volume was failed. > root@localhost:/opt/win# virsh detach-disk testwin vdc > error: Failed to detach disk > errpr: operation failed: detaching virtio-disk2 device failed: Device 'virtio-disk2' not found But kvm(qemu?) seems like detaching device successfully. > root@localhost:/opt/win# virsh qemu-monitor-command testwin 'info block' > drive-virtio-disk0: type=hd removable=0 file=/opt/win/win2008server.virtio.img ro=0 drv=qcow2 encrypted=0 So, problem is, libvirt doesn't know detaching, but kvm(qemu) knows. Again, please let me know if anybody has workaround. P.S. at some website, I found "hotunplugging is not supported in current libvirt", is that related on this matter? Regards, mkey

1 0