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[libvirt-users] Failed to connect to Xen 4.1 using virsh
by YAO 26 May '11

26 May '11

Hi, I installed xen 4.1 and libvirt 0.9.1 on ubuntu 10.04 x86 when I tried "*virsh -c xen:/// list*", the terminal give me error: *error: unable to connect to '/var/run/libvirt/libvirt-sock', libvirtd may need to be started: No such file or directory* *error: failed to connect to the hypervisor* But when I tried "*sudo virsh -c xen:/// list*", there's different error: *error: unable to connect to 'localhost:8000': Connection refused* *error: failed to connect to the hypervisor* That really confused me. Do I need to start libvirtd like "*sudo libvirtd*"? cause "*virsh -c test:///default list*" is OK without it. I have started xencommons and xend, so I really don't know what I missed... Thanks, Yao

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[libvirt-users] Replace library WinXPs by virtual WinXPs as on a linux Fedora system?
by Rob 25 May '11

25 May '11

Hi, The current situation: * About 500 university library PCs run WinXP as the main OS. I would like to achieve the following: * Replace the WinXP by a linux system (Fedora?) with virtualizationsoftware (KVM?) and have WinXP as a guest OS, in such a way that the users immediately boot into WinXP without noticing the virtualization. * Over the network I should still be able to access the host Fedora OS. Is this a feasible idea? If yes, can you give me some clues how to start? Thank you! Rob.

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[libvirt-users] Replace library WinXPs by virtual WinXPs as on a linux Fedora system?
by Rob 25 May '11

25 May '11

Hi, The current situation: * About 500 university library PCs run WinXP as the main OS. I would like to achieve the following: * Replace the WinXP by a linux system (Fedora?) with virtualizationsoftware (KVM?) and have WinXP as a guest OS, in such a way that the users immediately boot into WinXP without noticing the virtualization. * Over the network I should still be able to access the host Fedora OS. Is this a feasible idea? If yes, can you give me some clues how to start? Thank you! Rob.

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[libvirt-users] Xen and live migration with VIR_MIGRATE_PERSIST_DEST
by Thibault VINCENT 24 May '11

24 May '11

Hi, I'm having a hard time to figure how to perform Xen live migration using the python API with the same rate of success than virt-manager. # virsh version Compiled against library: libvir 0.8.3 Using library: libvir 0.8.3 Using API: Xen 3.0.1 Running hypervisor: Xen 3.2.0 The goal is to have the migration done in only one call, including a definition in the remote xend and undefinition from the source, which requires the VIR_MIGRATE_PERSIST_DEST and VIR_MIGRATE_UNDEFINE_SOURCE flags. Here's the code doing the migration: ---------- flags = (libvirt.VIR_MIGRATE_LIVE ^ libvirt.VIR_MIGRATE_PERSIST_DEST ^ libvirt.VIR_MIGRATE_UNDEFINE_SOURCE) uri = 'xenmigr://remote.host.com:8002' domain_obj.migrate(con_handle, flags, None, uri, 0) ---------- There are various problems that occur randomly, such as the VM completely disappearing 5 seconds after a succesful migration, but the main issue is with VIR_MIGRATE_PERSIST_DEST that doesn't seem to have any effect. The domU is not defined in xend and will vanish when destroyed or on hypervisor reboot. Could that be a known problem or related to a bug ? I'm really out of ideas. Any help appreciated, Thank you ! -- Thibault VINCENT - IT SmartJog S.A.S. - Groupe TDF - Pôle multimédia 27 Bd Hippolyte Marques, 94200 Ivry-sur-Seine, France Phone: +33.1.58.68.62.38 / Fax: +33.1.58.68.60.97

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[libvirt-users] Java Bindings for libvirt
by Atul Gosain 24 May '11

24 May '11

Hi I looked at the java bindings for libvirt at http://libvirt.org/sources/java/ . Latest version here is 0.4.7 whereas the latest version of libvirtd is 0.9.1 . Does the java binding use latest libvirtd ? If not, can it be created easily ? Also, is there any plan to support HyperV support in future ? Thanks Atul

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[libvirt-users] Live Migration UDP implementation
by prakash hr 23 May '11

23 May '11

Hi all, For my academic project to analyse the Performance of transport protocols in Live Migration of Virtual Machines.I have configured the live migration using tcp and I succeed the live migration. Now for my further remaining project work I need to do the same thing for the UDP implemataiton.When I changed the command in virsh, (My fianl command in TCP is virsh migrate --live ubuntu21 qemu+ssh://172.16.17.23/systemtcp:// 172.16.17.23:444) to udp it is not workng. It is given that qemu embeds user mode network stack which includes tcp,dhcp,udp.etc within the wemu process. Its giving the error no API found for UDP. ---Now i want to implement the patch file for migration using UDP if possible. ---Where I should change the API in order to perform the live migration using UDP. ---Is any patch file available so that modifying that patch file will perform the Live Migration using UDP. ---If implementation using not possible with UDP please give me the details why that can not be implemented and is any proofs for that reasons are appreciated. --Is there any other transport layer protocols can be used instead of TCP during Live migration.? --How about using RUDP instead of TCP. Thanking You in advance. Thanks and Regards Prakash H.R M.Tech Student at RVCE, Bangalore +91-8904301073

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[libvirt-users] getting live migration to work..
by Jelle de Jong 23 May '11

23 May '11

Hello everybody, I am trying to get migration to work with the pacemaker VirtualDomain RA. However I hit some problems and went back to the basic. I also can't get virsh to do the migration so I am kind of stuck and can use some advice. # connection and general info and the migration tests http://paste.debian.net/117736/ # capabilities http://paste.debian.net/117745/ Thanks in advance, Kind regards, Jelle de Jong

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[libvirt-users] Improving video for Windows7 kvm guest on fc14
by Alex 23 May '11

23 May '11

Hi, I have an existing windows7 x86_64 kvm guest running on fedora14 x86_64 with a Radeon HD5700 at 1680x1050, and would like to improve the resolution of the Windows guest. How can I change the Windows driver to something more capable than "standard vga"? It currently reports there is only 16MB of RAM at available at 1440x900. How can I increase this? I've tried using virsh or editing the xml directly, but it doesn't seem to be reflected in the guest. Some of the configuration options I've read in the documentation don't work with fedora14 and virt-manager, such as the acceleration options. This is my current configuration: <video> <model type='vmvga' vram='192000' heads='1'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> How can I more effectively use the video card's capabilities in the Windows guest? Thanks, Alex

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[libvirt-users] Migrate doesn't support copy-storage-all
by Abhishek Gupta 21 May '11

21 May '11

While using --copy-storage-all option while doing live migration I am getting following error : error: command 'migrate' doesn't support option --copy-storate-all I am using kvm hypervisor. Does that mean kvm doesn't support the option or libvirt doesn't provide support for the same with kvm as the hypervisor? -- Abhishek Student, IIT Delhi

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[libvirt-users] Blank console and no boot
by Francesc Guasch 19 May '11

19 May '11

Hi. I was cloning a domain and now I can't boot the original nor the clone domain. Currently when I start one of those domains I can see only a blank screen. I am not sure what went wrong cloning. I was trying to use kpart to mount the new image and change info in the filesystem like hostname, ip and so. Anyway when I start the new or old domain: # virsh start --console thedomain Domain thedomain started Connected to domain thedomain Escape character is ^] And that's all.I see nothing with libvirt graphical console, nothing in the logs but this, that I guess it's the usual startup info: LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/sbin:/sbin:/bin QEMU_AUDIO_DRV=none /usr/bin/kvm -S -M pc-0.12 -enable-kvm -m 512 -smp 1,sockets=1,cores=1,threads=1 -name .... ... This is qemu-kvm 0.12.5+noroms-0ubuntu7.1 on ubuntu server 10. Any hints so I can check what could have go wrong ? I am concerned about not being able to see what is going on. I guess there must be a way to start the domains and watch the boot process somehow. Is this possible ? thank you for you time

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