- Users - libvirt List Archives

[libvirt-users] libvirt-java: generate Java code from rng schema
by Celsina Bignoli 05 Jan '12

05 Jan '12

Hi, I am a quite new to libvirt, and need to use it from within Java code. I was wondering if anyone has been able to generate Java classes from the publisher rng schema. I also wonder why rng format was used over more common formats, which would make things easier since there are a number of code generators for it which are well established, at least in the Java world... Any suggestion would be greatly appreciated. Thank you, elsa

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[libvirt-users] Feasibility of iscsi storage pool
by Dennis Jacobfeuerborn 05 Jan '12

05 Jan '12

Hi, I want to start using iscsi storage but ran into a problem. I defined a storage pool and this contains my first LUN which is mounted on a hypervisor. When I now add a second LUN on a target and do a tgt-admin --update --force to reload the target the i/o to the first LUN seems to freeze for a few seconds. Now I'm wondering if I'm doing anything wrong? It's not really tolerable to have all guests using this target freeze simply because I want to add another LUN. The alternative is to use one LUN per target and define lots of targets on the server but then the whole pool configuration no longer makes sense as I would essentially end up with one pool per guest volume. Does anyone have experience with this kind of setup? Regards, Dennis

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[libvirt-users] [LIBVIRT] Xen issue.
by Armand Leclercq 05 Jan '12

05 Jan '12

Hi everybody, I'ld to use virsh over ssh in order to connect to my xen hypervisor from one of my DomU. I tried: virsh -c xen+ssh://root@192.168.0.67:22 list --all And it correctly listed the started virtual computers. And when I tried virsh connect xen+ssh://root@192.168.0.67:22 And I got. error: no connection driver available for xen:/// error: failed to connect to the hypervisor Does that mean I wrongly configured my computers or that libvirt does not support such connection from a DomU. -- Armand Leclercq EPITA 2013 06 71 57 90 73 armand.leclercq(a)gmail.com. /Computer Science is embarrassed by the computer./ _Alan Perlis_

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[libvirt-users] Hotplug/hotadd functionality of libvirt?
by Kees van Reeuwijk 04 Jan '12

04 Jan '12

Hello, First of all, happy new year! I am interested in the hot plugging facilities of libvirt, in particular in what qemu calls 'hot add' of network interface cards. (And also the reverse: hot unplugging/removing of NICs.) I think I am overlooking something, but so far the best I have been able to find is: http://libvirt.org/sources/virshcmdref/html/ and it is not entirely clear to me what the relevant virsh commands are. The most obvious choice seems to be the iface-* commands such as http://libvirt.org/sources/virshcmdref/html/sect-iface-define.html but these seem to be about physical rather than virtual network interfaces, and the documentation `needs to be written' anyway, and from the copyright notice the manual seems to be somewhat outdated by now. Can you give me a little help with this? Is such hot plug/add functionality supported by libvirt in the first place? Is there some kind of overview document about this? What is the most authoritative documentation of this functionality? Is there a Java or C API to access this functionality? Thank you for any help you can give me, -- Kees van Reeuwijk

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[libvirt-users] How to connect to a remote VM ESXi server with Python language?
by ice 30 Dec '11

30 Dec '11

Hi, Dear Mr/Mrs. I have trouble in connecting to a VM ESXi server with python. I am a developer using libvirt to control remote VM ESXi with python language. But I am not able to connect to a remote VM ESXi server. I make my try to solve this issue: 1: I use the function libvirt.Open() to open the remote VM ESXi Server, but I don't know how to input the password. It seems that there is no parameter for password input. 2: I use "virsh connect ---". It is succeed when it is executed on locale machine manual, but failed when I invoke this command in python environment. I use "subprocess.Popen" to execute the command "virsh", but this function would be hung on after command "communicate" executed. -bash-4.1# python Python 2.6.6 (r266:84292, May 20 2011, 16:42:11) [GCC 4.4.5 20110214 (Red Hat 4.4.5-6)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> from subprocess import Popen,PIPE,STDOUT >>> command=['virsh', '-c', 'esx://192.168.58.144/?no_verify=1','list', '--all'] >>> p=Popen(command, stdin=PIPE,stdout=PIPE, stderr=STDOUT) >>> output = p.communicate()[0] How to fix it? Thanks for help! Best regards!

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[libvirt-users] redirect ports from user network
by Алексей Беляев 30 Dec '11

30 Dec '11

Hello. I would like to redirect some ports from user network to host system. In console i can do it: /usr/libexec/qemu-kvm -drive file=/home/libvirt/qemu-fedora.img -vnc 10.200.1.1:1 -net user -redir tcp:22000::49999 -redir tcp:22001::22 How can i do it with libvirt? I make users network in XML config VM: <interface type='user'> <mac address='52:54:00:48:3f:f5'/> <alias name='net0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> But i don't know - how to make redirecting ports and i cann't fint it in documentation. Is it possible? -- Thanks for your feedback. Best regards, Alex

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[libvirt-users] cannot find -lportablexdr
by Juliano Souza 28 Dec '11

28 Dec '11

When I try to compile libvirt: checking for xdrmem_create in -lportablexdr... no checking for library containing xdrmem_create... no configure: error: Cannot find a XDR library Where have that libxdr source? Thanks. -- Juliano Souza

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[libvirt-users] Libvirt java from Windows
by Sergey Sudakovich (ssudakov) 24 Dec '11

24 Dec '11

I am writing a java based client that would be executed from windows that will use libvirt. 1. Got libvirt-java ( http://libvirt.org/sources/java/libvirt-java-0.4.7.tar.gz) and build a jar out it (ant with no params) 2. Then, according to http://libvirt.org/windows.html, built a dll using the "MSYS build script" 3. Got 2 files libvirt-0.dll and libqemu-0.dll When I run the sample example(from Eclipse) from http://libvirt.org/java.html I get the following error: Exception in thread "main" java.lang.UnsatisfiedLinkError: Unable to load library 'virt': %1 is not a valid Win32 application. at com.sun.jna.NativeLibrary.loadLibrary(NativeLibrary.java:169) at com.sun.jna.NativeLibrary.getInstance(NativeLibrary.java:242) at com.sun.jna.Library$Handler.<init>(Library.java:140) at com.sun.jna.Native.loadLibrary(Native.java:368) at com.sun.jna.Native.loadLibrary(Native.java:353) at org.libvirt.jna.Libvirt.<clinit>(Unknown Source) at org.libvirt.Connect.<clinit>(Unknown Source) at Main.main(Main.java:26) Also tried instead of step 2 cross compile in Fedora - same error message when I use new dll's. Does anybody have any idea where do I start fixing the issue?? -- Thank you, Sergey Sudakovich

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[libvirt-users] for a guest accessing host "full disk", how to prevent host vgscan
by David Mansfield 24 Dec '11

24 Dec '11

Hi All. I have a dell system with a H700 raid. Within the hardware RAID config I've created a "virtual disk" which I have assigned to one of my guests. On the host the device is "/dev/sdb", on the guest it's "/dev/vdb". This works fine. Within the guest, we have created lvm PV on /dev/vdb (using the whole disk - no partitions) and created a volume group. The guest's hostname is "argo" and the vg is called "vg_argo_bkup". When I reboot the host, it does a vgscan and finds the volume group and activates it in the _host_, which I need to prevent (I think??). I have successfully done this by filtering "/dev/sdb" in /etc/lvm/lvm.conf (which does NOT work as advertised BTW), but referencing the extremely volatile SCSI "sd*" names seems a terrible way to do this. If I fiddle around in the HW raid config, the /dev/sd? may change. I plan on creating about 10 more VM's spread over a number of machines over the next weeks with a very similar setup, and the admin overhead seems like it'll be onerous and error-prone. I'd love to be able to filter the volume groups by VG name instead of pv device node. The host's hostname is "narnia" and I'd love to say, 'vgscan --include-regex "vg_narnia.*"' or something similar, if you get my drift. Does anyone have a best practice for this? I'm sure iSCSI enthusiasts must have the exact same issue all the time. Oh... I'm using centos 6.2 on host and guest, libvirt-0.9.4-23.el6_2.1.x86_64, although it hardly seems a libvirt issue at all, it seems to be a lvm host issue mainly. Thanks, David Mansfield

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Re: [libvirt-users] [virt-tools-list] error creating NFS storage pool
by Cole Robinson 23 Dec '11

23 Dec '11

On 12/16/2011 05:32 PM, Grant Siebrecht wrote: > Virtual Machine Manager 0.9.0 > OS = Ubuntu 11.10 > I've tried changing permissions on my_nfs_server to 777 with still no luck. > > > > Error creating pool: Could not start storage pool: cannot open volume > '/var/lib/libvirt/images/my_nfs_server/.$EXTEND': Permission denied > > Traceback (most recent call last): > File "/usr/share/virt-manager/virtManager/asyncjob.py", line 44, in cb_wrapper > callback(asyncjob, *args, **kwargs) > File "/usr/share/virt-manager/virtManager/createpool.py", line 480, in > _async_pool_create > poolobj = self._pool.install(create=True, meter=meter, build=build) > File "/usr/lib/pymodules/python2.7/virtinst/Storage.py", line 489, in install > raise RuntimeError(errmsg) > RuntimeError: Could not start storage pool: cannot open volume > '/var/lib/libvirt/images/my_nfs_server/.$EXTEND': Permission denied > moving to libvirt-users What is the .$EXTEND file? Is it a socket or something strange like that? - Cole

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