- Users - libvirt List Archives

[libvirt-users] the naming convention libvirt names a block based storage volume
by Yih-Herng Chuang 10 Aug '11

10 Aug '11

Seems like different libvirt versions generate a storage volume name in different format. We would like to learn how libvirt names a storage volume under a block based storage pool. So that we may properly extract the LUN identifier out of the volume name for now and in the future. On host A loaded with libvirt 0.8.7 # virsh vol-list SanPool1 Name Path ----------------------------------------- unit:0:0:11 /dev/disk/by-id/wwn-0x600a0b800013071a000035ec4e32b832 On host B loaded with libvirt 0.8.1 # virsh vol-list SanPool1 Name Path ----------------------------------------- 1.0.0.0 /dev/disk/by-id/wwn-0x60080e500017e1d40000d0b74d873b13 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

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[libvirt-users] virt-manager - how to add /dev/mapper as a storage pool
by Marc Haber 09 Aug '11

09 Aug '11

Hi, I would like to be able to configure VMs running off dm-crypt devices that were unlocked in the host. Unlocked dm-crypt devices show up in /dev/mapper/devicename, with devicename being the second parameter given to cryptsetup luksOpen. The LVM storage pool type insists on searching in /dev/vgname and cannot be tricked into reading /dev/mapper by giving it a fake VG named mapper; the LVM storage pool type "dir" mishandles /dev/mapper/control ("illegal seek"). Is there a workaround to be able to use such devices in virt-manager without having to define a single storage pool for every device used? 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] XML file location
by Jeff 08 Aug '11

08 Aug '11

Can anyone tell me how to change the default directory which stores the guest XML files? I want to keep them with the guest image files on a shared NFS filesystem. Thanks, Jeff

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[libvirt-users] Create volume wit libvirt API for Python
by Anatoliy Guskov 06 Aug '11

06 Aug '11

Please help! How create volume with libvirt API for python? conn = libvirt.open(qemu:///system) vol = libvirt.virStoragePool(conn) conf_file = 'disk.xml' f = open(conf_file) xml = f.read() pool = "default" vol.createXML(pool,xml) xml file disk.xml: <volume> <name>name.img</name> <key>/var/lib/libvirt/images/name.img</key> <source> </source> <capacity>21474836480</capacity> <allocation>21474840576</allocation> <target> <path>/var/lib/libvirt/images/name.img</path> <format type='raw'/> </target> </volume> This script not work :-( Thanks for help!

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[libvirt-users] Reg: Packaging format for LIBIVRT
by Alphonse Hansel Anthony 04 Aug '11

04 Aug '11

Hi, I am looking for an available Open Source Packaging model for Libvirt, similar to OVF/OVA supported by Vmware. The OVA model uses the manifest to define the resource requirements for the virtual appliance and the XML schema follows OVF. Are there similar specification to include libvirt XML in a package along with disk images/ISO... etc? Any pointers in this regard would be useful. Thanks, Alphonse

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[libvirt-users] Using libvirt with a preexisting network infrastructure
by Vegard Vesterheim 04 Aug '11

04 Aug '11

I have a server running Ubuntu natty (libvirt 0.8.8) with separate ethernet interfaces. I have created an unnumbered bridge for each interface, these are connected to an already established network infrastructure, with preexisting DHCP and DNS services. I would like to handle *establishment* of these bridges outside libvirt (via /etc/network/interfaces), but still have them defined as networks within libvirt. So, libvirt shall not *configure* the bridges, just be aware of their existence and connect each VM to its configured bridge. This way I can use virt-manager/libvirt to connect my virtual hosts to the correct network. The libvirt commands net-start, net-destroy would become no-ops. It seems that libvirt is geared towards handling all network configuration itself, but I do not need help from libvirt for establishing the bridges, DHCP and DNS. I know that I can edit the <interface> element in the VM XML-files after creation, to assign a virtual host to a bridge, like this: <interface type='bridge'> <source bridge='br22'/> .... </interface> This works, but I would like to do this with libvirt mechanisms. Is this possible? - Vegard V -

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[libvirt-users] Custom storage pools/volumes
by Mohammed Naser 04 Aug '11

04 Aug '11

Hello everyone, We're currently working with using libvirt as an abstract API to make our dealings with other hypervisors far easier and faster, however, we have our own storage API that connects/disconnects and makes LUNs available over iSCSI with iSER. We would have loved to use a storage pool however our system implements a one target per LUN/VDI, therefore, we'd have to create a pool for each server. We really would like to utilize the virStorageVolDownload / virStorageVolUpload API calls, however, it seems that those would only work if the storage volume is within a pool. Is there a way we could possibly define a storage volume without a pool or will we have to create a storage pool for each individual volume? Thank you, Mohammed Naser http://vexxhost.com

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[libvirt-users] ANNOUNCE: libvirt Perl bindings Sys::Virt 0.9.4 release
by Daniel P. Berrange 04 Aug '11

04 Aug '11

I am happy to announce a new release[1] of the libvirt Perl bindings, Sys::Virt 0.9.4 is available for download: http://search.cpan.org/CPAN/authors/id/D/DA/DANBERR/Sys-Virt-0.9.4.tar.gz Changes in this release - Add all new APIs in libvirt 0.9.4 - Requires libvirt >= 0.9.4 - Add missing VIR_DUMP_* and VIR_MIGRATE_* constants from previous releases The permanent link for the Sys::Virt package, where all historic releases can be found, is http://search.cpan.org/dist/Sys-Virt/ Thanks to everyone who contributed to this release through testing, bug reporting, patch submission, etc. Regards, Daniel -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| |: http://libvirt.org -o- http://virt-manager.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :|

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Re: [libvirt-users] Associating a statefile with an image
by Eric Blake 03 Aug '11

03 Aug '11

[re-adding the list] On 08/02/2011 03:18 PM, sethuraman subbiah wrote: >> Libvirt shoots for monthly releases; the current schedule is feature freeze this weekend, then a release around the first of August. >> >> The new API will allow you do to either: >> >> virsh dumpxml --inactive --dom> file.xml >> edit file.xml >> virsh save dom dom.save --xml file.xml >> virsh restore file.save >> >> or: >> >> virsh dumpxml --inactive --dom> file.xml Using --inactive here only works if you haven't made any changes to the inactive configuration that differs from the currently running domain. I'd amend this step to 'virsh dumpxml dom > file.xml' for both of these examples. >> virsh save dom dom.save >> edit file.xml >> virsh restore file.save --xml file.xml These two examples will be supported in 0.9.4. Additionally, I added: virsh save-file-dumpxml dom.save > file.xml virsh save-file-define dom.save file.xml virsh save-file-edit dom.save to do things inline, and to make it so you don't have to remember to 'virsh dumpxml dom' prior to 'virsh save'. > > I found that the latest libvirt (libvirt 0.9.4) is out. That's amazing, considering it hasn't been released yet :) Maybe you are referring to 0.9.4-rc2 instead? But at any rate, the official 0.9.4 will probably be released tomorrow with even more bug fixes above 0.9.4-rc2. > I tried installing in my Centos 5.6 machine. After a successful installation, when I start virsh , I get : > > virsh: /lib/libvirt.so.0: version `LIBVIRT_PRIVATE_0.8.2' not found (required by virsh) > > Is it possible to get the latest version of libvirt 0.9.4 work on Centos 5.6 ? Thanks a lot for your help. Yes, it should be possible, although I haven't tried it myself on centos (but I have tried on RHEL 5.7). Are you sure you installed your self-built libvirt.so correctly? We take great pains to ensure that libvirt.so is backwards compatible (no symbols are ever removed). -- Eric Blake eblake(a)redhat.com +1-801-349-2682 Libvirt virtualization library http://libvirt.org

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Re: [libvirt-users] centos6.0 unable to install guests w/ kickstart via virt-install
by JDF. Franklin 02 Aug '11

02 Aug '11

Looks like you're missing some backslashes toward the bottom, so virt-install wouldn't see anything past "os-variant". Here's mine (adding the ttyS0 allows looking at it on the cli with "virsh console" as well): virt-install \ --name=myhost \ --connect qemu:///system \ --disk path=/data/virt/guest$$,size=20,bus=virtio \ --vcpus=2 --ram=1024 \ --graphics vnc,keymap=en-us \ --autostart \ --location=http://example.org/ks/el6/x86_64/ \ -x "console=ttyS0,115200 ks=http://example.org/ks/myhost.cfg" \ --network bridge=br0 \ --os-type=linux \ --os-variant=virtio26

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