January 2016 - Users - libvirt List Archives

[libvirt-users] Failure when attaching a device
by Jean-Pierre Ribeauville 11 Jan '16

11 Jan '16

Hi, I'm facing following issue ( or misunderstanding from my side) I try to attach a device to a running guest ; I want to do it persistently and without having to restart the GUEST . By using options "-live - persistent" , I got following error : [root@ldc01omv01 data]# virsh attach-device VM_RHEL7-1 "../data/channel_omnivision_to_be_used.xml" --live --persistent Please enter your authentication name: root@ldc01omv01 Please enter your password: error: Failed to attach device from ../data/channel_omnivision_to_be_used.xml error: Requested operation is not valid: cannot modify device on transient domain [root@ldc01omv01 data]# virsh -r list --all Id Name State ---------------------------------------------------- 8 VM_RHEL7-2 running 11 W2008R2-2 running 12 VM_RHEL7-1 running By using options "-live " , I got following error : [root@ldc01omv01 data]# virsh attach-device VM_RHEL7-1 "../data/channel_omnivision_to_be_used.xml" --live Please enter your authentication name: root@ldc01omv01 Please enter your password: error: Failed to attach device from ../data/channel_omnivision_to_be_used.xml error: Unable to read from monitor: Connection reset by peer [root@ldc01omv01 data]# virsh -r list --all Id Name State ---------------------------------------------------- 8 VM_RHEL7-2 running 11 W2008R2-2 running [root@ldc01omv01 data]# And then the Guest is powered off !! If I try to attach device when the Guest is off , then : [root@ldc01omv01 data]# virsh attach-device VM_RHEL7-1 "../data/channel_omnivision_to_be_used_1.xml" --config --persistent Please enter your authentication name: root@ldc01omv01 Please enter your password: error: failed to get domain 'VM_RHEL7-1' error: Domain not found: no domain with matching name 'VM_RHEL7-1' FYI , xml file contents is : <channel type='unix'> <source mode='bind' path='//var/lib/libvirt/qemu/VM_RHEL7-1_omnivision_1.agent'/> <target type='virtio' name='omnivision_1.agent'/> </channel> I'm using libvirt-1.2.17-13.el7.x86_64 Any help is welcome. Thanks. Regards, J.P. Ribeauville P: +33.(0).1.47.17.20.49 . Puteaux 3 Etage 5 Bureau 4 jpribeauville(a)axway.com<mailto:jpribeauville@axway.com> http://www.axway.com<http://www.axway.com/> P Pensez à l'environnement avant d'imprimer.

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Re: [libvirt-users] operation forbidden Read Only Access
by Jean-Pierre Ribeauville 11 Jan '16

11 Jan '16

Hi, I found an answer : Use virConnectOpenAuth() instead of virConnectOpenReadOnly(). As my piece of code is running silently (without user connected) , by using virConnectOpenAuth() , is it possible to avoid to prompt user to get user /password ? Thx. J.P. -----Message d'origine----- De : libvirt-users-bounces(a)redhat.com [mailto:libvirt-users-bounces@redhat.com] De la part de libvirt-users-request(a)redhat.com Envoyé : vendredi 8 janvier 2016 12:51 À : libvirt-users(a)redhat.com Objet : libvirt-users Digest, Vol 73, Issue 6 Send libvirt-users mailing list submissions to libvirt-users(a)redhat.com To subscribe or unsubscribe via the World Wide Web, visit https://www.redhat.com/mailman/listinfo/libvirt-users or, via email, send a message with subject or body 'help' to libvirt-users-request(a)redhat.com You can reach the person managing the list at libvirt-users-owner(a)redhat.com When replying, please edit your Subject line so it is more specific than "Re: Contents of libvirt-users digest..." Today's Topics: 1. Unable to retrieve Guest IP Addresses via libvirt API (Jean-Pierre Ribeauville) 2. Re: Unable to retrieve Guest IP Addresses via libvirt API (Martin Kletzander) 3. Re: Unable to retrieve Guest IP Addresses via libvirt API (Jean-Pierre Ribeauville) 4. Re: libvirtd and polkit: internal error: No Unix Process ID (Daniel P. Berrange) 5. operation forbidden Read Only Access (Jean-Pierre Ribeauville) ---------------------------------------------------------------------- Message: 1 Date: Thu, 7 Jan 2016 19:31:57 +0000 From: Jean-Pierre Ribeauville <jpribeauville(a)axway.com> To: "libvirt-users(a)redhat.com" <libvirt-users(a)redhat.com> Subject: [libvirt-users] Unable to retrieve Guest IP Addresses via libvirt API Message-ID: <1051EFB4D3A1704680C38CCAAC5836D292F01EF8(a)WPTXMAIL2.ptx.axway.int> Content-Type: text/plain; charset="iso-8859-1" Hi , Despite the fact that my Guest has an IP address , by running this piece of code on a KVM host : ifaces_count = F_virDomainInterfaceAddresses(domain, &ifaces,VIR_DOMAIN_INTERFACE_ADDRESSES_SRC_LEASE, NULL); ifaces_count = F_virDomainInterfaceAddresses(domain, &ifaces,VIR_DOMAIN_INTERFACE_ADDRESSES_SRC_AGENT, NULL); I'm not able to get a ifaces_count different from -1 Additionnaly : - IP Addresses are not present within the xmldesc of this Guest.(not sure that they should appear there) I'm running libvirt-1.2.17-13.el7.x86_64 Did I misunderstood something ? As ovirt manager shows the address correctly , it should be possible to get it via libvirt ... Thanks for help. J.P. Ribeauville P: +33.(0).1.47.17.20.49 . Puteaux 3 Etage 5 Bureau 4 jpribeauville(a)axway.com<mailto:jpribeauville@axway.com> http://www.axway.com<http://www.axway.com/> P Pensez ? l'environnement avant d'imprimer.

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[libvirt-users] centos6.5 libvirt 1.2.14 virsh hang
by 王李明 11 Jan '16

11 Jan '16

hi all： my environment is centos6.5 libvirt version is 1.2.14-1 qemu version is 1.7.0-1 I use openstack create a windows guest about two days later I run virsh list but the the process is hang virsh list can not return any thing it hang look like this： then I run /etc/init.d/libvirtd restart it show libivrtd stop faild and start failed i will use the gdb and find the gdb can not print any process stack look like this： I run /etc/init.d/libvirtd status it show libvired dead but subsys locked who can help me ? thans

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[libvirt-users] operation forbidden Read Only Access
by Jean-Pierre Ribeauville 11 Jan '16

11 Jan '16

Hi, When issuing virDomainInterfaceAddresses() libvirt C language API, I got following error: libvirt: Domain Config error : operation forbidden: read only access prevents virDomainInterfaceAddresses How may I ask for a non-readonly connexion ? ( looks like to be RO by default) Thx for help. Regards, J.P. Ribeauville P: +33.(0).1.47.17.20.49 . Puteaux 3 Etage 5 Bureau 4 jpribeauville(a)axway.com<mailto:jpribeauville@axway.com> http://www.axway.com<http://www.axway.com/> P Pensez à l'environnement avant d'imprimer.

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[libvirt-users] Unable to retrieve Guest IP Addresses via libvirt API
by Jean-Pierre Ribeauville 11 Jan '16

11 Jan '16

Hi , Despite the fact that my Guest has an IP address , by running this piece of code on a KVM host : ifaces_count = F_virDomainInterfaceAddresses(domain, &ifaces,VIR_DOMAIN_INTERFACE_ADDRESSES_SRC_LEASE, NULL); ifaces_count = F_virDomainInterfaceAddresses(domain, &ifaces,VIR_DOMAIN_INTERFACE_ADDRESSES_SRC_AGENT, NULL); I'm not able to get a ifaces_count different from -1 Additionnaly : - IP Addresses are not present within the xmldesc of this Guest.(not sure that they should appear there) I'm running libvirt-1.2.17-13.el7.x86_64 Did I misunderstood something ? As ovirt manager shows the address correctly , it should be possible to get it via libvirt ... Thanks for help. J.P. Ribeauville P: +33.(0).1.47.17.20.49 . Puteaux 3 Etage 5 Bureau 4 jpribeauville(a)axway.com<mailto:jpribeauville@axway.com> http://www.axway.com<http://www.axway.com/> P Pensez à l'environnement avant d'imprimer.

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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 09 Jan '16

09 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 08 Jan '16

08 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 06 Jan '16

06 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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