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[libvirt-users] "INTx fd" busy error on VM startup at boot, subsequent startup okay
by Michael Gratton 11 Jan '16

11 Jan '16

Hey all, I'm getting an error starting a libvirt managed qemu/kvm VM at physical host boot time, but manually starting it afterwards works fine. This is on a Ubuntu Wily i7-4790 box running Linux 4.2 and libvirt 1.2.16. There is a legacy (5V) PCI card being passed through to the VM, the error seems to relate to that. The error that always appears at boot in `/var/log/libvirt/qemu/test-vm.log` is: > 2016-01-11T05:29:28.487935Z qemu-system-x86_64: -device > vfio-pci,host=05:00.0,id=hostdev0,bus=pci.0,addr=0x4: vfio: Error: > Failed to setup INTx fd: Device or resource busy > 2016-01-11T05:29:28.488148Z qemu-system-x86_64: -device > vfio-pci,host=05:00.0,id=hostdev0,bus=pci.0,addr=0x4: Device > initialization failed > 2016-01-11T05:29:28.488169Z qemu-system-x86_64: -device > vfio-pci,host=05:00.0,id=hostdev0,bus=pci.0,addr=0x4: Device > 'vfio-pci' could not be initialized After the physical machine has completed booting, starting the VM via virsh or virt-manager works fine. The card is an old Firewire card. I have blacklisted the firewire modules on the physical machine so they aren't loaded, but is it possible that the kernel, udev or some other process still has access to the device when systemd starts the libvirt-bin service? Any clues greatly appreciated. Thanks, //Mike -- ⊨ Michael Gratton, Percept Wrangler. ⚙ <http://mjog.vee.net/>

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[libvirt-users] libvirtd and polkit: internal error: No Unix Process ID
by Benedikt Heine 10 Jan '16

10 Jan '16

Hi all, I want to use libvirtd and polkit to create simple access restricitions for incoming TLS connections. libvirtd.conf: > ... > auth_tls = "sasl" > access_drivers = [ "polkit" ] > ... > tls_no_verify_certificate = 1 SASL and TLS in combination is already working without any faults. After activating access_drivers, the setup breaks, cause the access is denied. without polkit: > [root@inexor-test ~]# virsh --connect qemu+tls://vm0.host.b3be.de/system > Please enter your authentication name: inexor@vm0 > Please enter your password: > Welcome to virsh, the virtualization interactive terminal. > ... with polkit: > [root@inexor-test ~]# virsh --connect qemu+tls://vm0.host.b3be.de/system > Please enter your authentication name: inexor@vm0 > Please enter your password: > error: failed to connect to the hypervisor > error: access denied I deactivated any self-written polkit-rules and had been able to track down the problem to communication with libvirtd and polkit (via pkttyagent). For every incoming connection, libvirtd logs this: > Jan 04 15:12:41 vm0 libvirtd[17075]: Unable to verify TLS peer: No certificate was found. > Jan 04 15:12:41 vm0 libvirtd[17075]: Certificate check failed Unable to verify TLS peer: No certificate was found. > Jan 04 15:12:45 vm0 libvirtd[17075]: internal error: No UNIX process ID available > Jan 04 15:12:45 vm0 libvirtd[17075]: access denied > Jan 04 15:12:45 vm0 libvirtd[17075]: access denied > Jan 04 15:12:45 vm0 libvirtd[17075]: Cannot recv data: Input/output error > Jan 04 15:12:47 vm0 libvirtd[17075]: Unable to verify TLS peer: No certificate was found. Additionally, what I found: After every libvirtd-restart the unit polkit.service loggs an Registered and directly after an Unregsitered Auth Agent. > Jan 04 15:28:29 vm0 polkitd[2670]: Registered Authentication Agent for unix- process:17225:3691193 (system bus name :1.97 [/usr/bin/pkttyagent --notify-fd 4 --fallback], object path /org/freedesktop/PolicyKit1/AuthenticationAgent, locale C) > Jan 04 15:28:30 vm0 polkitd[2670]: Unregistered Authentication Agent for unix- process:17225:3691193 (system bus name :1.97, object path /org/freedesktop/PolicyKit1/AuthenticationAgent, locale C) (disconnected from bus) (Correct! In the first second it registers and shortly it unregisteres again) Could someone please provide me a hint how to make libvirtd and polkit talk to each other? Sincerely, Bene polkit-version: 0.113 libvirt-version: 1.3.0 Running on Archlinux (init: systemd)

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[libvirt-users] remove cdrom after installing os on a guest
by Andrei Perietanu 09 Jan '16

09 Jan '16

Hi all, I have the following issue, and I hope someone know a way to handle it. I need to grammatically need to create/install a guest OS using the libvirt API. Currently what I do: 1. create a xml with the vm configuration (this will include a path to the iso image) 2. connection.defineXML(<my_config>) 3. vm = connection.lookupByName(<domain_name>) 4. vm.create() This will create a new guest and boot the iso to install the OS. But after installation, when I restart, It again boots from the cdrom. So obviously I need remove the cdrom somehow. I could edit the xml and manually remove the cdrom, but the problem here is how do I know when to do that - i.e. how do I know if the OS has been installed or not? If I use virsh-install to create a guest with the same configuration, after the OS is installed, the cdrom is automatically removed form the guest configuration. Any help is greatly appreciated. Andrei -- The information transmitted is intended only for the person or entity to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of or taking of any action in reliance upon this information by persons or entities other than the intended recipient is prohibited. If you receive this in error please contact the sender and delete the material from any computer immediately. It is the policy of Klas Limited to disavow the sending of offensive material and should you consider that the material contained in the message is offensive you should contact the sender immediately and also your I.T. Manager. Klas Telecom Inc., a Virginia Corporation with offices at 1101 30th St. NW, Washington, DC 20007. Klas Limited (Company Number 163303) trading as Klas Telecom, an Irish Limited Liability Company, with its registered office at Fourth Floor, One Kilmainham Square, Inchicore Road, Kilmainham, Dublin 8, Ireland.

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[libvirt-users] API for retrieving resource metrics from VMs?
by BYEONG-GI KIM 07 Jan '16

07 Jan '16

Hello. I'm a new getting started to learn the libvirt API. I've tried to find APIs which retrieve resource metrics such as cpu, disk, memory, and network I/O usages, but I could find few related thing; I was intended to use libvirt-Java binding first, it seems I'd be better to use the others like Python binding or C API though. The Java binding API is likely to provide very limited API list comparing with the above APIs so far. So, I'd like to know which APIs can retrieve that resources from VMs. I don't care about the language, but I really want to know whether such APIs even exists or not. As far as I know, cpu, memory, and network I/O seems being provided, but I'm not sure disk usage per VMs can be obtained via libvirt API. Thanks in advance. Best regards bgkim

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[libvirt-users] Efficient live disk backup with active blockcommit : Failed 'block-commit': Could not reopen file: Permission denied
by Keyur Bhalerao 06 Jan '16

06 Jan '16

Hi , Working on the simple POC : Advanced snapshot using libvirt and qemu . Following are the exact steps which are followed . 1. Created as base VM - Ubuntu 15.10 with following libvirt and qemu versions Using library: libvirt 1.2.16 Using API: QEMU 1.2.16 Running hypervisor: QEMU 2.3.0 QEMU emulator version 2.3.0 (Debian 1:2.3+dfsg-5ubuntu9.1), Copyright (c) 2003-2008 Fabrice Bellard 2.Created nested VM (vm-01) using VirtManager on base VM. 3.Used following commands to take the multiple snapshots - virsh # list Id Name State ---------------------------------------------------- 7 vm-01 running virsh # domblklist vm-01 Target Source ------------------------------------------------ vda /home/ubuntu/vm-01.img hda /dev/sr0 snapshot-create-as --domain vm-01 snap1 --diskspec vda,file=/var/lib/libvirt/sn1.qcow2 --disk-only --atomic snapshot-create-as --domain vm-01 snap2 --diskspec vda,file=/var/lib/libvirt/sn2.qcow2 --disk-only --atomic virsh #snapshot-list vm-01 ------------------------------------------------------------ snap1 2015-12-07 11:51:51 -0800 disk-snapshot snap2 2015-12-07 11:52:28 -0800 disk-snapshot virsh # snapshot-list vm-01 --tree snap1 | +- snap2 List the current block device in use, again. It can be noticed, the new overlay 'sn2.qcow2' is the current disk in use: virsh # domblklist vm-01 Target Source ------------------------------------------------ vda /var/lib/libvirt/sn2.qcow2 hda /dev/sr0 Now that the backup is finished, perform active blockcommit by live mergning contents of sn2 into base: ubuntu@keyurubuntu:~$ virsh blockcommit vm-01 vda --active --verbose --pivot error: internal error: unable to execute QEMU command 'block-commit': Could not reopen file: Permission denied I am not sure why this is getting as permission denied. I have tried couple of times reinstalling and creating new VMs . Every time when i have tried to block-commit getting landed into same error. Is there any troubleshooting or solution to this issue. Stuck on this issue for last 2 days. Quick help much appreciated. Thanks, Keyur Bhalerao Reference used - http://wiki.libvirt.org/page/Live-disk-backup-with-active-blockcommit - http://kashyapc.com/2012/09/14/externaland-live-snapshots-with-libvirt/

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[libvirt-users] Hypervisor loses network connectivity
by Phill Edwards 04 Jan '16

04 Jan '16

I have been running KVM on a CentOS 7.1 host for a few months. I have one "main" host server plus a "backup" host server. Some time ago everything was running fine on "main", but all of a sudden the server became non-contactable on it's network interface. I could no longer SSH in and therefore couldn't run virt-manager. I don't know what caused this and I had to bring all the VMs up on "backup" and they've been running OK there ever since. Over the last few days I've rebuilt "main" and again all was going well and I migrated 4 of the 5 VMs back onto it. Then this morning I came to set up the final VM on "main" which is a Sophos firewall machine with 3 NICs (I have 3 physical NICs). Nothing uses 2 of the 3 NICs except the Sophos VM. I unplugged one of the ethernet cables from "backup" and plugged it into the 3rd NIC on "main" and all of a sudden "main" froze and again all network connectivity was lost. I rebooted it but the problem still remains that it's not contactable over the network and is therefore totally non-functional. When I log in at the console and run "ip a" I can see various network interfaces including br0 with the expected IP address - so it looks like it's got network connectivity but it hasn't. Has anyone else experienced this and know why it happens and how to fix it? I don't think I fancy rebuilding everything a 3rd time as it seems likely to happen again. Depending on why it's happening I'm thinking of moving off CentOS onto Ubuntu as the host OS, or moving away from KVM altogether. Thanks in advance for any help you can give.

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[libvirt-users] External snapshot warning.
by Dominique Ramaekers 04 Jan '16

04 Jan '16

Hi, If I make an external snapshot using the method of active block commit, I get these messages after the block commit: $virsh snapshot-create-as CmsrvAPP2 --name onderhoudscript --disk-only --atomic --quiesce --no-metadata Domein snapshot onderhoudscript is aangemaakt $virsh blockcommit CmsrvAPP2 vda --verbose --pivot 2016-01-03 18:14:52.784+0000: 15861: info : libvirt version: 1.2.16, package: 1.2.16-2ubuntu11.15.10.1 2016-01-03 18:14:52.784+0000: 15861: warning : virEventPollUpdateTimeout:268 : Ignoring invalid update timer -1 Successfully pivoted I've googled the 'invalid update timer -1' warning and found some messages about losing disk data after snapshot commits (using an other methode of snapshotting). I've done some tests with snapshotting, creating a file in the guest, doing the blockcommit. And I don't notice something weird. The only weird thing is: it only happens with one of the ten guests that run on the host... Should I worry about this? Greetings and thanks in advance, Dominique.

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[libvirt-users] QXL-driver for Windows 10
by Dominique Ramaekers 25 Dec '15

25 Dec '15

Hi, I can't seem to find a QXL-driver for Windows 10. The qxl-0.1-21 won't install due to being incompatible to Windows 10. Am I missing something? Thanks in advance, Dominique.

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[libvirt-users] double nat - common setup
by lejeczek 22 Dec '15

22 Dec '15

hi everybody my mind must have gone blank & eyes blind, I'm hoping it's simple and somebody can shed the light on bit I cannot see. a regular default net: <network> <name>default</name> <uuid>4c0a0c44-7e8a-493b-a57c-87cd38eaa0f7</uuid> <forward mode='nat'/> <bridge name='virbr0' stp='on' delay='0'/> ... a winbox on that net and I cannot access it from/via Internet, port forwarding fixed on the default gw/internet interface (or rather firewalld's zone), it forwards to winbox. what is it?

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[libvirt-users] Setting environment variables for LXC Containers
by Harish Vishwanath 22 Dec '15

22 Dec '15

Hello Is there a way to set custom environment variables for LXC containers so that it is available for all processes within the container? The libvirt-lxc driver seems to be setting up only the below variables (as per the docs), but there doesn't seem to be a way customize it. containerThe fixed string libvirt-lxc to identify libvirt as the creator container_uuidThe UUID assigned to the container by libvirtPATHThe fixed string /bin:/usr/binTERMThe fixed string linuxHOMEThe fixed string / In addition to the standard variables, the following libvirt specific environment variables are also provided LIBVIRT_LXC_NAMEThe name assigned to the container by libvirt LIBVIRT_LXC_UUIDThe UUID assigned to the container by libvirt LIBVIRT_LXC_CMDLINEThe unparsed command line arguments specified in the container configuration. Use of this is discouraged, in favour of passing arguments directly to the container init process via the initarg config element. I am looking for something similar to this: https://linuxcontainers.org/lxc/manpages/man5/lxc.container.conf.5.html (lxc.environment) Regards, Harish

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