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[libvirt-users] how to detect if qemu supports live disk snapshot
by Francesco Romani 15 Jan '14

15 Jan '14

Hi everyone, Using the QEMU hypervisor, when a live disk snapshot is requested through libvirt, the request can fail if the underyling qemu binary lacks the snapshotting support. In python, we have something like libvirtError: Operation not supported: live disk snapshot not supported with this QEMU binary I'd like to detect ahead of time if the underlying QEMU can or cannot do snapshotting, and disable right from the start the snapshotting support in my application, avoiding to throw errors to the user. After reading from the docs, it seems that libvirt doesn't reports yet this information about the hypervisor in the capabilities XML: http://libvirt.org/formatcaps.html a quick test against libvirt 1.1.3 (qemu 1.6.1) on Fedora 20 seems to confirm (see XML dump below[1]). So, if I'm not mistaken, looks like the only way to test for the support in QEMU is to actually request a snapshot and see what happens. Is this right? If this is correct, I would like to craft and propose a patch to libvirt to export this information, maybe into a form of some kind of warning list/blacklist: disk snapshotting it is supposed to be available, but this particular QEMU doesn't support it. What would be the best form to export such information? the options I see are * enhance the capabilities XML * add a new API: something like (very rough first draft) int virDomainIsSnapshotSupported(virConnectPtr conn, unsigned int flags); Thoughts? Any suggestion is welcome. Best regards, +++ [1] # virsh -c qemu:///system Welcome to virsh, the virtualization interactive terminal. Type: 'help' for help with commands 'quit' to quit virsh # capabilities <capabilities> <host> <uuid>01c4dc83-b652-cb11-9e6d-f3bf03b35d26</uuid> <cpu> <arch>x86_64</arch> <model>SandyBridge</model> <vendor>Intel</vendor> <topology sockets='1' cores='2' threads='2'/> <feature name='erms'/> <feature name='smep'/> <feature name='fsgsbase'/> <feature name='rdrand'/> <feature name='f16c'/> <feature name='osxsave'/> <feature name='pcid'/> <feature name='pdcm'/> <feature name='xtpr'/> <feature name='tm2'/> <feature name='est'/> <feature name='smx'/> <feature name='vmx'/> <feature name='ds_cpl'/> <feature name='monitor'/> <feature name='dtes64'/> <feature name='pbe'/> <feature name='tm'/> <feature name='ht'/> <feature name='ss'/> <feature name='acpi'/> <feature name='ds'/> <feature name='vme'/> </cpu> <power_management> <suspend_mem/> <suspend_disk/> <suspend_hybrid/> </power_management> <migration_features> <live/> <uri_transports> <uri_transport>tcp</uri_transport> </uri_transports> </migration_features> <topology> <cells num='1'> <cell id='0'> <memory unit='KiB'>7871524</memory> <cpus num='4'> <cpu id='0' socket_id='0' core_id='0' siblings='0-1'/> <cpu id='1' socket_id='0' core_id='0' siblings='0-1'/> <cpu id='2' socket_id='0' core_id='1' siblings='2-3'/> <cpu id='3' socket_id='0' core_id='1' siblings='2-3'/> </cpus> </cell> </cells> </topology> <secmodel> <model>selinux</model> <doi>0</doi> </secmodel> <secmodel> <model>dac</model> <doi>0</doi> </secmodel> </host> <guest> <os_type>hvm</os_type> <arch name='i686'> <wordsize>32</wordsize> <emulator>/usr/bin/qemu-system-i386</emulator> <machine canonical='pc-i440fx-1.6' maxCpus='255'>pc</machine> <machine maxCpus='255'>pc-q35-1.4</machine> <machine maxCpus='255'>pc-q35-1.5</machine> <machine canonical='pc-q35-1.6' maxCpus='255'>q35</machine> <machine maxCpus='1'>isapc</machine> <machine maxCpus='255'>pc-0.10</machine> <machine maxCpus='255'>pc-0.11</machine> <machine maxCpus='255'>pc-0.12</machine> <machine maxCpus='255'>pc-0.13</machine> <machine maxCpus='255'>pc-0.14</machine> <machine maxCpus='255'>pc-0.15</machine> <machine maxCpus='255'>pc-1.0</machine> <machine maxCpus='255'>pc-1.1</machine> <machine maxCpus='255'>pc-1.2</machine> <machine maxCpus='255'>pc-1.3</machine> <machine maxCpus='255'>pc-i440fx-1.4</machine> <machine maxCpus='255'>pc-i440fx-1.5</machine> <machine maxCpus='1'>none</machine> <domain type='qemu'> </domain> <domain type='kvm'> <emulator>/usr/bin/qemu-kvm</emulator> <machine canonical='pc-i440fx-1.6' maxCpus='255'>pc</machine> <machine maxCpus='255'>pc-q35-1.4</machine> <machine maxCpus='255'>pc-q35-1.5</machine> <machine canonical='pc-q35-1.6' maxCpus='255'>q35</machine> <machine maxCpus='1'>isapc</machine> <machine maxCpus='255'>pc-0.10</machine> <machine maxCpus='255'>pc-0.11</machine> <machine maxCpus='255'>pc-0.12</machine> <machine maxCpus='255'>pc-0.13</machine> <machine maxCpus='255'>pc-0.14</machine> <machine maxCpus='255'>pc-0.15</machine> <machine maxCpus='255'>pc-1.0</machine> <machine maxCpus='255'>pc-1.1</machine> <machine maxCpus='255'>pc-1.2</machine> <machine maxCpus='255'>pc-1.3</machine> <machine maxCpus='255'>pc-i440fx-1.4</machine> <machine maxCpus='255'>pc-i440fx-1.5</machine> <machine maxCpus='1'>none</machine> </domain> </arch> <features> <cpuselection/> <deviceboot/> <acpi default='on' toggle='yes'/> <apic default='on' toggle='no'/> <pae/> <nonpae/> </features> </guest> <guest> <os_type>hvm</os_type> <arch name='x86_64'> <wordsize>64</wordsize> <emulator>/usr/bin/qemu-system-x86_64</emulator> <machine canonical='pc-i440fx-1.6' maxCpus='255'>pc</machine> <machine maxCpus='255'>pc-q35-1.4</machine> <machine maxCpus='255'>pc-q35-1.5</machine> <machine canonical='pc-q35-1.6' maxCpus='255'>q35</machine> <machine maxCpus='1'>isapc</machine> <machine maxCpus='255'>pc-0.10</machine> <machine maxCpus='255'>pc-0.11</machine> <machine maxCpus='255'>pc-0.12</machine> <machine maxCpus='255'>pc-0.13</machine> <machine maxCpus='255'>pc-0.14</machine> <machine maxCpus='255'>pc-0.15</machine> <machine maxCpus='255'>pc-1.0</machine> <machine maxCpus='255'>pc-1.1</machine> <machine maxCpus='255'>pc-1.2</machine> <machine maxCpus='255'>pc-1.3</machine> <machine maxCpus='255'>pc-i440fx-1.4</machine> <machine maxCpus='255'>pc-i440fx-1.5</machine> <machine maxCpus='1'>none</machine> <domain type='qemu'> </domain> <domain type='kvm'> <emulator>/usr/bin/qemu-kvm</emulator> <machine canonical='pc-i440fx-1.6' maxCpus='255'>pc</machine> <machine maxCpus='255'>pc-q35-1.4</machine> <machine maxCpus='255'>pc-q35-1.5</machine> <machine canonical='pc-q35-1.6' maxCpus='255'>q35</machine> <machine maxCpus='1'>isapc</machine> <machine maxCpus='255'>pc-0.10</machine> <machine maxCpus='255'>pc-0.11</machine> <machine maxCpus='255'>pc-0.12</machine> <machine maxCpus='255'>pc-0.13</machine> <machine maxCpus='255'>pc-0.14</machine> <machine maxCpus='255'>pc-0.15</machine> <machine maxCpus='255'>pc-1.0</machine> <machine maxCpus='255'>pc-1.1</machine> <machine maxCpus='255'>pc-1.2</machine> <machine maxCpus='255'>pc-1.3</machine> <machine maxCpus='255'>pc-i440fx-1.4</machine> <machine maxCpus='255'>pc-i440fx-1.5</machine> <machine maxCpus='1'>none</machine> </domain> </arch> <features> <cpuselection/> <deviceboot/> <acpi default='on' toggle='yes'/> <apic default='on' toggle='no'/> </features> </guest> </capabilities> -- Francesco Romani

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[libvirt-users] --persistent/--config confusion
by Dennis Jacobfeuerborn 15 Jan '14

15 Jan '14

Hi, I'm wondering how to attach a network device properly to a domain. According to the man page without "--config" a device created with "attach-device" will be added to the domain yet with "--config" it will only be added to the config and only be available after a restart of the guest. Is there no way to attach the device immediately *and* also make that change persistent? Regards, Dennis

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[libvirt-users] Dedicated GDM session for a virt-manager virtual machine?
by Alex GS 15 Jan '14

15 Jan '14

Dear list, Something has been perplexing me lately. I have a bunch of Windows 7 virtual machines running on top of Fedora 20 in KVM using virt-manager. One of the big problems is that users who need the Windows VM's don't know how to user virt-manager and when they accidentally reboot a machine I have to manually setup the virt-manager session for them and make it full-screen. That means if I'm not physically there the users are unable to use the Windows sessions and cannot do their work. Is there a way to create a GDM desktop session that just launches a virtual machine via virsh and then logs directly into a full-screen virt-viewer instance of that virtual machine? Best, AGS

1 0

[libvirt-users] libvirt on armhf with selinux driver
by Ivan Gooten 14 Jan '14

14 Jan '14

hi, recently i've been busy with libvirt(d) v1.2.0 on armhf and i see, even if selinux sec driver is enabled on the configure stage, the driver is not finally created. these configure parameters are: --with-selinux --with-secdriver-selinux --with-selinux-mount=/sys/fs/selinux the /sys/fs/selinux is valid, selinux is running in permissive mode, got also libselinux DEV package installed, so no missing req. headers here. when trying to run libvirtd, i'm getting: error : virSecurityDriverLookup:78 : unsupported configuration: Security driver selinux not enabled error : lxcSecurityInit:1461 : Failed to initialise security drivers error : virStateInitialize:854 : Initialisation of LXC state driver failed: unsupported configuration: Security driver selinux not enabled error : daemonRunStateInit:909 : Driver state initialisation failed someone got any clue what may be causing this? thanks, ivan gooten

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[libvirt-users] Migration: default value for maxdowntime? (QEMU/KVM)
by Scott Sullivan 10 Jan '14

10 Jan '14

I am wondering what the default value for migrate-setmaxdowntime is when using QEMU/KVM. http://builder.virt-tools.org/artifacts/libvirt-virshcmdref/html/sect-migra… Is the default the same as QEMU's default in this case? I was looking at libvirts source and it appears there is no default set within libvirt, unless I missed it. I do see qemuDomainMigrateSetMaxDowntime() directly enters the monitor to change the value when set with that command. Any insight/confirmation is appreciated.

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[libvirt-users] migrate interrupted but cannot continue
by leocup 09 Jan '14

09 Jan '14

Hello, I have 2 hosts A and B,the settings of libvirtd are A: Compiled against library: libvirt 0.10.2 Using library: libvirt 0.10.2 Using API: QEMU 0.10.2 Running hypervisor: QEMU 0.12.1 B: Compiled against library: libvir 0.9.4 Using library: libvir 0.9.4 Using API: QEMU 0.9.4 Running hypervisor: QEMU 0.12.1 when I migrate a guest from A to B without storage,I used the command "virsh migrate --live --copy-storage-all --verbose vm qemu+ssh://kvm/system".The first time I succeed and I wantto to emulate the local network is down when I migrate,so I close the terminal (Xshell) when migrating, when I reconnect to the terminal ,use the migration command again,it failed.The libvirtd.log says: error : qemuMonitorIORead:514 : Unable to read from monitor: Connection reset by peer warning : qemuMonitorMigrateToFd:1941 : failed to close migration handle It seems that the migration process has not finished normally and so migration cannot go on. I want to know how to resolve it. thanks.

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[libvirt-users] ANNOUNCE: ruby-libvirt 0.5.2
by Chris Lalancette 09 Jan '14

09 Jan '14

All, This is a release notification for ruby-libvirt 0.5.2. ruby-libvirt is a ruby wrapper around the libvirt API. The changelog between 0.5.1 and 0.5.2 is: * Fix to make sure we don't free more entries than retrieved (potential crash) Version 0.5.2 is available from http://libvirt.org/ruby: Tarball: http://libvirt.org/ruby/download/ruby-libvirt-0.5.2.tgz Gem: http://libvirt.org/ruby/download/ruby-libvirt-0.5.2.gem It is also available from rubygems.org; to get the latest version, run: $ gem install ruby-libvirt As usual, if you run into questions, problems, or bugs, please feel free to mail me (clalancette gmail com) and the libvirt mailing list. Thanks to Guido Günther for the patch to fix this problem.

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[libvirt-users] Canceling a live migration via virsh? (QEMU/KVM)
by Scott Sullivan 08 Jan '14

08 Jan '14

I am using QEMU/KVM, using Live Migrations like this: virsh migrate --live ${name} qemu+ssh://${DESTINATION}/system My question, running this command makes it hang in the foreground. Is there a way for this to return immediately, so I can just poll for the migration status? Also, is there a way to _cancel_ a migration? I see the --timeout option, however if a given timeout is reached I would rather have the ability to cancel the migration than force the suspend. I do see there is a QEMU api migrate_cancel..eg: virsh qemu-monitor-command ${name} --pretty '{"execute":"migrate_cancel"}' Is that the only way to cancel a migration using libvirt?

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[libvirt-users] Ownerships of VMs and Image files
by Christoph Pleger 07 Jan '14

07 Jan '14

Hello, I installed libvirt and qemu/kvm on a machine. I testet a little with those and found out that all users having an account on that machine can start every VM of every other user on the machine, in some conditions even directly access the image file on the real host. What I would like to have is that every user can only access the VMs and image files he or she created himself/herself, as long as he/she does not explicitly set other permissions. Is it possible to achieve that? Regards Christoph

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[libvirt-users] How to start the linux container's network interface automatically
by WANG Cheng D 06 Jan '14

06 Jan '14

Dear all, I failed to start the linux container's network interface automatically. I have to start it manually each time after the container finishes booting. I know that in a native fedora, if we want the network interface to start automatically, we should edit "/etc/sysconfig/network-script/ifcfg-eth0 and add the string "ONBOOT=yes". My host is fedora 16. I used "yum --installroot=/root/fedoralxc --releasever=16 install -y openssh, bridge-utils" to setup the rootfs for my container (Laine thought that my fedora version is a little bit older, I wonder if the newer version fedora container can automatically start its network interface ) After rootfs installation, in the container's file system, there is no sub-directory named "network-scripts" in "/etc/sysconfig" . So, I created this directory manually and added a file named "ifcfg-eth0", but the container's network interface still cannot start automatically. I tried to add files ".bash_profile" and ".bashrc" in which I added the "ifconfig" in the shell script to try to configure eth0 automatically, but it still doesn't work. I wonder if there is a ".bashrc" for the root of a container? If there is, where should this file be located? Any comments will be highly appreciated. Cheng

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[libvirt-users] How to start the container's network interface automatically
by WANG Cheng D 06 Jan '14

06 Jan '14

Dear all, I failed to start the container's network interface automatically. I have to start it manually each time after the container finishes booting. I know that in a native fedora, if we want the network interface to start automatically, we should edit "/etc/sysconfig/network-script/ifcfg-eth0 and add the string "ONBOOT=yes". My host is fedora. I used "yum --installroot=/root/fedoralxc --releasever=16 install -y openssh, bridge-utils" to setup the rootfs for my container After rootfs installation, in the container's file system, there is no sub-directory named "network-scripts" in "/etc/sysconfig" . So, I created this directory manually and added a file named "ifcfg-eth0", but the container's network interface still cannot start automatically. I tried to add files ".bash_profile" and ".bashrc" in which I added the "ifconfig" in the shell script to try to configure eth0 automatically, but it still doesn't work. I wonder if there is a ".bashrc" for the root of a container? If there is, where should this file be located? Any comments will be highly appreciated. Cheng

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[libvirt-users] ANNOUNCE: Oz 0.12.0 release
by Chris Lalancette 03 Jan '14

03 Jan '14

All, I'm pleased to announce release 0.12.0 of Oz. Oz is a program for doing automated installation of guest operating systems with limited input from the user. Release 0.12.0 is a bugfix and feature release for Oz. Some of the highlights between Oz 0.11.0 and 0.12.0 are: * Fixes to concurrent oz-install invocations * Python 3 compatibility in the test suites * Support for Ubuntu 12.04.3 * Support for Mageia * Allow a MAC address to be passed in (instead of auto-generated) * Support for RHEL5.10 * Support for Ubuntu 13.10 * Use lxml instead of libxml2 for XML document processing (it has much better error messages) * Remove the unused "tunnels" functionality * Support FreeBSD 10.0 * Remove deprecated functions from the Guest class * Speed up guest customization on guests that support NetworkManager * Follow subprocess commands as they are executed (makes debugging easier) * Ensure that any paths from the user are absolute, otherwise things don't work properly * Add support for OpenSUSE 13.1 * Add support for Fedora 20 * Add support for RHEL-7 A tarball and zipfile of this release is available on the Github releases page: https://github.com/clalancette/oz/releases . Packages for Fedora-19, Fedora-20, and EPEL-6 have been built in Koji and will eventually make their way to stable. Instructions on how to get and use Oz are available at http://github.com/clalancette/oz/wiki . If you have questions or comments about Oz, please feel free to contact me at clalancette at gmail.com, or open up an issue on the github page: http://github.com/clalancette/oz/issues . Thanks to everyone who contributed to this release through bug reports, patches, and suggestions for improvement. Chris Lalancette

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Re: [libvirt-users] [libvirt] [RFC] Implementing ftrace support for libvirt
by Mauricio Tavares 03 Jan '14

03 Jan '14

On Fri, Jan 3, 2014 at 6:46 AM, yuxh <yuxinghai(a)cn.fujitsu.com> wrote: > Hi all, > > Happy new year! > > The existing trace mechanism in libvirt is dtrace. Although the dtrace > can work, it's not work well enough. Every time we want get information > from the trace point we must write a systemtap script and run it > together with libvirt. > > That's really unpractical on some occasion, especially on production > server since the systemtap script can't be executed automatically. > And some problems may be not easy to reproduce, then it will cost a > lot of time to get the trace information again. > > So I think it is essential to add supporting for record the trace > information automatically in libvirt to satisfy the user's requirement. > That's why I'm currently implementing ftrace support in libvirt. > > How do you think about my idea? Any comment will be appreciated! > How hard/painless it would be to implement it? And, can you have both and then select which one to use? > Thanks, > Yu > > -- > libvir-list mailing list > libvir-list(a)redhat.com > https://www.redhat.com/mailman/listinfo/libvir-list

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[libvirt-users] Connect libvirt to iSCSI target
by Marco 30 Dec '13

30 Dec '13

Hi! I'm new to libvirt and face problems connecting to an iSCSI target. What I intend to do is to connect libvirt (I tried virt-manager and virsh) to an iSCSI target and then boot from the LUNs which contain the VMs. I followed the documentation¹ but got stuck at section 12.1.5.4.3. 1) virsh pool-define-as \ --name foo \ --type iscsi \ --source-host vmhost \ --source-dev iqn.2013-11.vmhost:vmpool \ --target /dev/disk/by-path 2) virsh pool-start foo error: Failed to start pool foo error: internal error: cannot find session virsh -c qemu:///system pool-start foo error: Failed to start pool foo error: internal error: cannot find session Why can't libvirt find the session, and which session? Running iscsiadm --mode discovery --type sendtargets --portal vmhost:3260,1 succeeds and lists the targets. How to connect libvirt to the iSCSI target? System info: Debian sid, Linux 3.11-2-amd64 libvirtd (libvirt) 1.1.4 virsh version: 1.1.4 iSCSI target: FreeNAS-9.1.1 Best regards Marco ¹ https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux…

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[libvirt-users] how to use openConsole and openGraphics
by yue 28 Dec '13

28 Dec '13

hi,all 1.how to use openConsole and openGraphics? 2.what is the theory of that? thanks

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[libvirt-users] fail to live migration is related to virtio-console
by yue 27 Dec '13

27 Dec '13

hi,all this error occured when live migration windows os, log of that vm is: features 0x1e unsupported allowed features 0x71000002 qemu warning error while loading state for instance 0x0 of device '0000:00:04.4/virtio-console' do you have some idea about that? thanks

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[libvirt-users] Reg: Methods in DomainJobInfo
by Rathidevi 27 Dec '13

27 Dec '13

Hi All, I am new to libvirt. Please explain about the units (which is bytes or KB or MB) and uses of DomainJobInfo and DomainBlockInfo methods. Like getMemRemaining(), getDataRemaining() etc. Using libvirt version is libvirt-0.5.1. Thank you Regards, Rathidevi

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[libvirt-users] Live migration without block copy
by Paul Mathews 24 Dec '13

24 Dec '13

Hello all, I'm trying to get live migration without block copying working in a custom solution, but I think I need a better understanding of the migration process. In my environment, I have two iscsi targets exported which are then placed into a raid via mdadm on the compute node. I've tried using the already exposed hook on stop to disassemble and re-export storage, and I also made my own when the source hits perform3_done phase, but at that point the md device is still locked. It seems like there should be a time in a live migration where both instances are in a paused state and everything has been flushed to disk, I'm just not familiar enough with the code to determine where that is. -Paul

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[libvirt-users] man page
by Fl＠sh 23 Dec '13

23 Dec '13

It seems to me that the man page is not complete. Personally, I had to read the code to understand. Propose to amend paragraph of included files on: -i GUEST-PATH=HOST-PATH, --include GUEST-PATH=HOST-PATH File (HOST-PATH) to copy into custom dir (GUEST-PATH). -I HOST-PATH, --includefile=HOST-PATH Copy all files listed in inputfile into the appropriate temporary sandbox directories. File should contain a line like: GUEST-PATH=HOST-PATH Directory (or subdirectory) of GUEST-PATH path must to exist in the guest filesystem (use --mount) Maybe I misunderstood how to use inclusion, but it says even more about what leadership should be written in detail. P.S. On the use of the network too. -- F1ash

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[libvirt-users] Virsh console stops accepting inputs
by Satvinder Gunsi 23 Dec '13

23 Dec '13

Hello All, I am trying following steps: 1. Untar a gzip image 2. virsh create NAME.xml ( for the image) 3. virsh console NAME The above steps are done for four times on different files. In step 3 above for one out of four VMs (usually the first one), when I try to login:, typing the first letter of password brings me back to "login:" prompt. Then for the next four tries "each" letter moves me from "login" to "password:" and back to "login:" I also see following error in libvirtd.log for each console login attempt. 25446: error : daemonStreamHandleAbort:609 : stream aborted at client request My libvirt version is: libvirtd (libvirt) 1.0.2 OS: FC16 Important: If I destroy the VM and bring it up again, then I donot see this issue and am able to successfully login. Can somebody help in resolving this issue. Thanks in advance, Regards, Satvinder

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[libvirt-users] How to attach USB disk to specified USB controller in domian?
by Jianwei Hu 23 Dec '13

23 Dec '13

Hi guys, I want to attach a few USB disks to specified USB controller in domain on libvirt layer, but I didn't find any method to deal with it. Anyone can help me on that? I added some USB type disk to my domain, started it, I found all USB disk had been attached to same USB controller automatically, I want to assign some USB disks to another controller manually but I can't find the entry. qemu-kvm has provided command line to support it by using "bus" argument.(like: device_add usb-storage,id=my_usb_disk,drive=my_usb_disk,bus=usb.0 ) Action steps: 1. Add some USB disks to domain xml, <disk type='file' device='disk'> <driver name='qemu' type='raw'/> <source file='/var/lib/libvirt/images/usb-img/usb-1.img'/> <target dev='sda' bus='usb'/> <alias name='usb-disk0'/> </disk> <disk type='file' device='disk'> <driver name='qemu' type='raw'/> <source file='/var/lib/libvirt/images/usb-img/usb-2.img'/> <target dev='sdb' bus='usb'/> <alias name='usb-disk1'/> </disk> ... 2. Added more than 2 USB controller to domain xml <controller type='usb' index='0'> <alias name='usb0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/> </controller> <controller type='usb' index='1'> <alias name='usb1'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/> </controller> <controller type='usb' index='2'> <alias name='usb2'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/> </controller> <controller type='usb' index='3'> <alias name='usb3'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0'/> </controller> 3. Enter into guest OS to check those usb device [root@localhost ~]# lsusb -t /: Bus 04.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M |__ Port 1: Dev 2, If 0, Class=Mass Storage, Driver=usb-storage, 12M |__ Port 2: Dev 3, If 0, Class=Hub, Driver=hub/8p, 12M |__ Port 1: Dev 4, If 0, Class=Mass Storage, Driver=usb-storage, 12M |__ Port 2: Dev 5, If 0, Class=Mass Storage, Driver=usb-storage, 12M |__ Port 3: Dev 6, If 0, Class=Mass Storage, Driver=usb-storage, 12M |__ Port 4: Dev 7, If 0, Class=Mass Storage, Driver=usb-storage, 12M |__ Port 5: Dev 8, If 0, Class=Mass Storage, Driver=usb-storage, 12M |__ Port 6: Dev 9, If 0, Class=Mass Storage, Driver=usb-storage, 12M |__ Port 7: Dev 10, If 0, Class=Mass Storage, Driver=usb-storage, 12M |__ Port 8: Dev 11, If 0, Class=Hub, Driver=hub/8p, 12M |__ Port 1: Dev 12, If 0, Class=Mass Storage, Driver=usb-storage, 12M |__ Port 2: Dev 13, If 0, Class=Mass Storage, Driver=usb-storage, 12M |__ Port 3: Dev 14, If 0, Class=Mass Storage, Driver=usb-storage, 12M |__ Port 4: Dev 15, If 0, Class=Mass Storage, Driver=usb-storage, 12M |__ Port 5: Dev 16, If 0, Class=Mass Storage, Driver=usb-storage, 12M |__ Port 6: Dev 17, If 0, Class=Mass Storage, Driver=usb-storage, 12M |__ Port 7: Dev 18, If 0, Class=Mass Storage, Driver=usb-storage, 12M |__ Port 8: Dev 19, If 0, Class=Hub, Driver=hub/8p, 12M |__ Port 1: Dev 20, If 0, Class=Mass Storage, Driver=usb-storage, 12M |__ Port 2: Dev 21, If 0, Class=Mass Storage, Driver=usb-storage, 12M |__ Port 3: Dev 22, If 0, Class=Mass Storage, Driver=usb-storage, 12M |__ Port 4: Dev 23, If 0, Class=Mass Storage, Driver=usb-storage, 12M |__ Port 5: Dev 24, If 0, Class=Mass Storage, Driver=usb-storage, 12M |__ Port 6: Dev 25, If 0, Class=Mass Storage, Driver=usb-storage, 12M |__ Port 7: Dev 26, If 0, Class=Mass Storage, Driver=usb-storage, 12M |__ Port 8: Dev 27, If 0, Class=Hub, Driver=hub/8p, 12M |__ Port 1: Dev 28, If 0, Class=Mass Storage, Driver=usb-storage, 12M |__ Port 2: Dev 29, If 0, Class=Mass Storage, Driver=usb-storage, 12M |__ Port 3: Dev 30, If 0, Class=Mass Storage, Driver=usb-storage, 12M |__ Port 4: Dev 31, If 0, Class=Mass Storage, Driver=usb-storage, 12M |__ Port 5: Dev 32, If 0, Class=Mass Storage, Driver=usb-storage, 12M |__ Port 6: Dev 33, If 0, Class=Mass Storage, Driver=usb-storage, 12M |__ Port 7: Dev 34, If 0, Class=Mass Storage, Driver=usb-storage, 12M |__ Port 8: Dev 35, If 0, Class=Hub, Driver=hub/8p, 12M |__ Port 1: Dev 36, If 0, Class=Mass Storage, Driver=usb-storage, 12M |__ Port 2: Dev 37, If 0, Class=Mass Storage, Driver=usb-storage, 12M |__ Port 3: Dev 38, If 0, Class=Mass Storage, Driver=usb-storage, 12M |__ Port 4: Dev 39, If 0, Class=Mass Storage, Driver=usb-storage, 12M |__ Port 5: Dev 40, If 0, Class=Mass Storage, Driver=usb-storage, 12M |__ Port 6: Dev 41, If 0, Class=Mass Storage, Driver=usb-storage, 12M |__ Port 7: Dev 42, If 0, Class=Mass Storage, Driver=usb-storage, 12M |__ Port 8: Dev 43, If 0, Class=Mass Storage, Driver=usb-storage, 12M /: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M /: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M /: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M [root@localhost ~]# BR, Jianwei

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[libvirt-users] assign static external IP to container
by scar 23 Dec '13

23 Dec '13

hello i have a server colocated in a datacenter with several external IP addresses available to use. the physical server is using one of these IPs, and i want to assign another, unused IP to the virtual machine. i thought i could just do this by editing the container's /etc/network/interfaces, setting a static IP address for eth0 much like i did for br0 on the host machine.... but doesn't seem to be working. ifconfig shows eth0 has the external address but i can't resolve any hostnames nor telnet to a direct IP address (no route to host). if i change back to dhcp and let eth0 get an internal address, i can at least access the internet but cannot access the virtual machine from the internet. what is the trick to giving a VM a routable, external IP address? thanks

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[libvirt-users] blockcopy for libvirt and version compatibility
by Mark Trinh 20 Dec '13

20 Dec '13

I'm currently running: virsh --version 1.0.2 libvirtd --version libvirtd (libvirt) 1.0.2 I have a couple questions. 1. Can I upgrade my libvirt.so version to use with an older libvirtd? In other words, does the versions of libvirt and libvirtd need to be in lock step? 2. I'm able to use virsh blockcopy, but I want to do it programmatically via C. I looked through the API and was not able to see any references to that. I did see mention of virDomainBlockCopy on the TIP of the git repository, but no other references to it. How do I run virsh blockcopy via a C function?

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[libvirt-users] About debugging of libvirt.
by cool dharma06 19 Dec '13

19 Dec '13

i am using libvirt-1.1.4 with xen(libxl). When destroying the VM its showing the following error : virsh # destroy 4 error: Failed to destroy domain 4 error: End of file while reading data: Input/output error error: One or more references were leaked after disconnect from the hypervisor error: Failed to reconnect to the hypervisor virsh # list error: failed to connect to the hypervisor error: no valid connection error: Failed to connect socket to '/var/run/libvirt/libvirt-sock': Connection refused already i send one request to this community to solve this problem. they suggested to do gdb. Any guide to do the gdb libvirtd. By googling i did the following things: 1. i enable the logoutput and loglevel in libvirtd.conf 2. restarted the libvirtd with the changed configuration file. 3. ps -aux | grep libvirtd 4. gdb libvirtd pid 5. then what i have to do to find the reason for this error. Suggest me some steps to solve this problem. regards, cooldharma06.

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[libvirt-users] fuse in libivrt-lxc
by Eldar Yusupov 19 Dec '13

19 Dec '13

Hi, I created an LXC domain via libvirt (on Fedora 20), but when I'm trying to mount a FUSE filesystem, like sshfs, I'm getting a following error: $ sshfs 172.30.15.2:/<mntdir> /<mntpoint> fuse: device not found, try 'modprobe fuse' first I see that there's no /dev/fuse device. Is there a way to make it work? Can I get it working via libvirt domain xml file settings or should I use something else, for example, edit cgroups settings directly somehow? Thanks in advance! -- -- Regards, Eldar Yusupov.

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