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[libvirt-users] active commit not supported with this QEMU binary
by Ishmael Tsoaela 01 Sep '16

01 Sep '16

Hi All, I am creating snapshot and whilest running blockcommit I am coming acrross this error: virsh blockcommit Node-A vda --verbose --pivot error: unsupported configuration: active commit not supported with this QEMU binary Does anyone know what this could be and how to fix it, i tried compiling latest libvirt and latest qemu.. libvirtd -V libvirtd (libvirt) 2.1.0 kvm -version QEMU emulator version 2.6.93, Copyright

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[libvirt-users] IDE vs SATA vs VirtIO
by William Kern 31 Aug '16

31 Aug '16

ok from googling its clear that VirtIO is consistently recommend for the best performance. However, with some legacy VMs that we are bringing into the system isn't an option. Is there a peformance difference between IDE and SATA? For that matter how much BETTER is VirtIO over the other two? Note, these are QCOW2 images if that makes a difference. -bill

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[libvirt-users] couple of questions about virt-v2v
by cmc 31 Aug '16

31 Aug '16

Hi, I have two questions about virt-v2v that I hope someone could help with. 1. I have a host that I use to export VMs from VMWare to oVirt, as the RHEL 7 version of virt-v2v does not support W2012. When I run the conversion/export (-o ovirt -os ovirt-srv:/mnt/export) it looks for a bridge on the host I'm running the export for. What does it need the bridge on the local host for? 2. When I run a conversion of a W2012 host, it reports: "virt-v2v: warning: Neither rhev-apt.exe nor vmdp.exe can be found. Unable to install one of them. virt-v2v: warning: there is no QXL driver for this version of Windows (6.2 x86_64). virt-v2v looks for this driver in /usr/share/virtio-win" I can't find these two exe files. I've installed the ovirt-guest-tools-iso for FC23, and symlinked the mounted ISO to /usr/share/virtio-win, and though the two files it is looking for are not on that ISO, I thought it might help (it doesn't). Can virt-v2v install such drivers, or should this just be done manually from within the guest? Thanks, C

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[libvirt-users] How to use virDomainOpenConsole
by Marina Danial 31 Aug '16

31 Aug '16

Hello, I have a quick question. Can anyone help with an example on how to use virDomainOpenConsole API in serial console access? Thanks Marina

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[libvirt-users] Issue with virsh screenshot
by Tadas 31 Aug '16

31 Aug '16

Hello lists, I have strange issue while creating VM screenshots. virsh screenshot vmname produces ppm image. But when i try to make second screenshot, it produces the same image, even is VM screen has changed. Running screenshot on third time, it produces correct image. It looks like screenshot is producing last image every second time it is ran. OS debian stretch. virsh --version 2.0.0 qemu-system-x86_64 --version QEMU emulator version 2.6.0 (Debian 1:2.6+dfsg-3), Copyright (c) 2003- 2008 Fabrice Bellard

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[libvirt-users] Use libvirt to create an NIC on the guest machine and connect to an existing TAP interface
by Marina Danial 30 Aug '16

30 Aug '16

Hello, I am facing the following issue. I have several TAP interfaces that are created by the following method on OpenVSwitch: *ovs-vsctl add-br br1* *sudo /usr/sbin/tunctl -t tap01 -p -u root* *sudo /sbin/ip link set tap01 up* *# Disable multicast* *sudo /sbin/ifconfig tap01 -multicast* *ovs-vsctl add-port br1 tap01* I need to launch a qemu VMs and have its NIC card that is created using libvirt to be connected to tap01 or other taps that are created with the above method. I need a way that libvirt only creates the new NIC on either eth0 or eht1 on the guest machine and connect it to tap01. Please help me in the best way to do so whether using the C++ APIs that libvirt provides or use the domain and/or network XMLs to achieve this. Thanks a lot Marina

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[libvirt-users] virtfs / 9p - and "Permission denied" in guests
by lejeczek 30 Aug '16

30 Aug '16

hi all I wonder host is your virtfs passthrough working? I'm for the first time trying, a pretty regular setup: <filesystem type='mount' accessmode='passthrough'> <source dir='/__.aLocalStorages/2/__.home.usersSecondHome'/> <target dir='__.x.USERs.SECOND_HOME'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x09' function='0x0'/> </filesystem> and guests mounts that mount tag, even lists the mountpoint's content, shows files & dirs but when tries to list a contets below, eg a subfolder of the mountpoint then it gets denied. would you have some suggestions how to troubleshoot it? many thanks, L

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[libvirt-users] Fwd: Re: installing and accessing a VM? - newbie question maybe
by gunnar.wagner＠netcologne.de 30 Aug '16

30 Aug '16

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[libvirt-users] Fwd: Re: installing and accessing a VM? - newbie question maybe
by gunnar.wagner＠netcologne.de 29 Aug '16

29 Aug '16

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[libvirt-users] Lifecycle of a connection to libvirtd
by Vincent Bernat 26 Aug '16

26 Aug '16

Hey! I am trying to figure out how to reliably maintain a connection to libvirtd. From the documentation, I would expect something like that: - virConnectOpen() - virConnectRegisterCloseCallback() - virConnectSetKeepAlive() - Application logic And in the registered callback, I would: - virConnectUnregisterCloseCallback() - virConnectClose() - virConnectOpen() - virConnectRegisterCloseCallback() - virConnectSetKeepAlive() However, looking at the source code of virsh, I see that it additional stuff, notably: - virConnectIsAlive() - checking error codes of all calls to check if they are the result of a disconnect Are those steps needed? Randomly checking virConnectIsAlive() doesn't seem reliable. Checking individual error codes either (maybe I will miss one of them or misinterpret another one). virsh code uses those error codes to check if there is a disconnection: (((last_error->code == VIR_ERR_SYSTEM_ERROR) && (last_error->domain == VIR_FROM_REMOTE)) || (last_error->code == VIR_ERR_RPC) || (last_error->code == VIR_ERR_NO_CONNECT) || (last_error->code == VIR_ERR_INVALID_CONN)))) Any hint? -- Program defensively. - The Elements of Programming Style (Kernighan & Plauger)

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