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[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

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[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

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[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

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[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

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[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

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[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

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[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

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[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

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[libvirt-users] build libvirt from source yourself and make sure to get the XenAPI driver enabled.
by Lovocas Mou 19 Aug '11

19 Aug '11

Hi, I want install libvirt on my ubuntu11.04, and I want to test using libvirt to manage a xenserver, after download the tar and extract them when in this step : ./configure --with-esx --with-xenapi --prefix=/opt/libvirt .... checking for xen_vm_start in -lxenserver... no configure: error: You must install the XenServer Library to compile XenAPI driver with -lxenserver ..... I get this error, but i get very few information about it from google. >>libvirt can use XenAPI via libxenserver [1]. That should allow you to >> use libvirt with a Citrix XenServer. You can use virsh like this >> assuming you have a libxenserver enabled libvirt: >> >> virsh -c xenapi://my-xen-server >> >> But it's true, there is no documentation about this on the libvirt website >> yet. >> >> [1] http://community.citrix.com/display/xs/Download+SDKs I download the libxenserver source and binary file from the above url, but I don't know how to install it and how to use -lxenserver, can anyone help me? thanks!

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[libvirt-users] Detecting the last user of a connection has closed.
by Andy Joslin 18 Aug '11

18 Aug '11

The documentation says something that concerns me: http://libvirt.org/html/libvirt-libvirt.html#virConnectClose "It is possible for the last virConnectClose<http://libvirt.org/html/libvirt-libvirt.html#virConnectClose>to return a positive value if some other object still has a temporary reference to the connection, but the application should not try to further use a connection after the virConnectClose<http://libvirt.org/html/libvirt-libvirt.html#virConnectClose>that matches the initial open." The application I am working on requires that I know when the last thread using this connection goes away, so I can properly cleanup some overhead. If I can't trust the return value of this call, how will I know that the connection is indeed torn down? Under what circumstances will the virConnectClose behave this way? Thanks, BTW, I am using 0.8.2

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