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Re: [libvirt-users] LibVirt + QEMU & no-shutdown
by Michael D 11 Jul '14

11 Jul '14

Scratch that, seems to depend on guest or perhaps even boot device. Finnix live CD halts correctly. Ubuntu 14.04 does not. On 11 July 2014 15:27, Michael D <me(a)md-5.net> wrote: > I am currently running LibVirt with Qemu on Debian Wheezy: > > Versions: > > - libvirtd (libvirt) 1.2.4 > - qemu-x86_64 version 2.0.0 (Debian 2.0.0+dfsg-4~bpo70+1), Copyright > (c) 2003-2008 Fabrice Bellard > > It's all working perfectly, including ACPI: virsh shutdown guest. However > when I issue "halt" from the guest, the guest stops but libvirt thinks it > is still running: (virsh list outputs state: running). virsh dominfo does > the same thing: State: running > > I believe this is due to the -no-shutdown flag passed to qemu, making it > stop the CPUs rather than halt entirely. Is this however a bug that the > status is not updated correctly? I've taken a glance at the source and it > should SIGTERM qemu when it sees the stop, but evidently it isn't. > > > Thanks > > Michael >

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[libvirt-users] LibVirt + QEMU & no-shutdown
by Michael D 11 Jul '14

11 Jul '14

I am currently running LibVirt with Qemu on Debian Wheezy: Versions: - libvirtd (libvirt) 1.2.4 - qemu-x86_64 version 2.0.0 (Debian 2.0.0+dfsg-4~bpo70+1), Copyright (c) 2003-2008 Fabrice Bellard It's all working perfectly, including ACPI: virsh shutdown guest. However when I issue "halt" from the guest, the guest stops but libvirt thinks it is still running: (virsh list outputs state: running). virsh dominfo does the same thing: State: running I believe this is due to the -no-shutdown flag passed to qemu, making it stop the CPUs rather than halt entirely. Is this however a bug that the status is not updated correctly? I've taken a glance at the source and it should SIGTERM qemu when it sees the stop, but evidently it isn't. Thanks Michael

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[libvirt-users] How to config qga to support dompmsuspend
by Hong-Hua.Yin＠freescale.com 10 Jul '14

10 Jul '14

Hi, I tried to run domsuspend command on my PowerPC board but failed. # virsh dompmsuspend sdk --target mem error: Domain sdk could not be suspended error: argument unsupported: QEMU guest agent is not configured It seemed that support suspend-to-mem only from capabilities. # virsh capabilities <capabilities> <host> <uuid>52498f7c-d584-45d8-8a15-345b14fa0d10</uuid> <cpu> <arch>ppc</arch> <topology sockets='1' cores='2' threads='1'/> <pages unit='KiB' size='4'/> <pages unit='KiB' size='1024'/> <pages unit='KiB' size='4096'/> <pages unit='KiB' size='16384'/> <pages unit='KiB' size='65536'/> <pages unit='KiB' size='262144'/> <pages unit='KiB' size='1048576'/> </cpu> <power_management> <suspend_mem/> </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'>2066304</memory> <cpus num='2'> <cpu id='0' socket_id='0' core_id='0' siblings='0'/> <cpu id='1' socket_id='0' core_id='1' siblings='1'/> </cpus> </cell> </cells> </topology> <secmodel> <model>none</model> <doi>0</doi> </secmodel> <secmodel> <model>dac</model> <doi>0</doi> <baselabel type='kvm'>+0:+0</baselabel> <baselabel type='qemu'>+0:+0</baselabel> </secmodel> </host> <guest> <os_type>hvm</os_type> <arch name='ppc'> <wordsize>32</wordsize> <emulator>/usr/bin/qemu-system-ppc</emulator> <machine maxCpus='1'>g3beige</machine> <machine maxCpus='32'>ppce500</machine> <machine maxCpus='1'>mac99</machine> <machine maxCpus='15'>mpc8544ds</machine> <machine maxCpus='1'>taihu</machine> <machine maxCpus='1'>ref405ep</machine> <machine maxCpus='1'>bamboo</machine> <machine maxCpus='1'>prep</machine> <machine maxCpus='1'>virtex-ml507</machine> <domain type='qemu'> </domain> <domain type='kvm'> <emulator>/usr/bin/qemu-system-ppc</emulator> </domain> </arch> <features> <deviceboot/> <disksnapshot default='on' toggle='no'/> </features> </guest> </capabilities> I read from some document about qemu guest agent but still don't know how to config it as daemon in guest domain. Best Regards, Olivia

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[libvirt-users] snapshot-create error
by Hong-Hua.Yin＠freescale.com 10 Jul '14

10 Jul '14

Hi, What's the difference between QEMU snapshot and libvirt snapshot? # qemu-img create -f qcow2 disk.img 512 Formatting 'disk.img', fmt=qcow2 size=512 encryption=off cluster_size=65536 lazy_refcounts=off # qemu-img info disk.img image: disk.img file format: qcow2 virtual size: 512 (512 bytes) disk size: 136K cluster_size: 65536 Format specific information: compat: 1.1 lazy refcounts: false # /usr/bin/qemu-system-ppc -M ppce500 -enable-kvm -m 512 -nographic -kernel /dev/shm/uImage -initrd /dev/shm/ramdisk -append "root=/dev/ram rw console=ttyS0,115200" -serial tcp::4444,server,telnet -snapshot -hda disk.img QEMU 1.7.0 monitor - type 'help' for more information (qemu) QEMU waiting for connection on: telnet:0.0.0.0:4444,server (qemu) savevm (qemu) info snapshot unknown command: 'info snapshot' (qemu) info snapshots ID TAG VM SIZE DATE VM CLOCK 1 vm-20140709035738 173M 2014-07-09 03:57:38 00:00:07.401 Is there any special qemu command options or kernel configurations to allow libvirt create snapshot? I got the error as below: virsh # snapshot-create snap error: unsupported configuration: internal snapshots and checkpoints require all disks to be selected for snapshot The domain XML file is converted as below steps. # cat >snap.args <<EOF /usr/bin/qemu-system-ppc -name snap -M ppce500 -enable-kvm -m 512 -nographic -kernel /dev/shm/uImage -initrd /dev/shm/ramdisk -append "root=/dev/ram rw console=ttyS0,115200" -serial pty # virsh domxml-from-native qemu-argv snap.args >snap.xml # cat sdk.xml <domain type='kvm'> <name>sdk</name> <memory unit='KiB'>524288</memory> <currentMemory unit='KiB'>524288</currentMemory> <vcpu placement='static'>1</vcpu> <os> <type arch='ppc' machine='ppce500'>hvm</type> <kernel>/dev/shm/uImage</kernel> <initrd>/dev/shm/ramdisk</initrd> <cmdline>root=/dev/ram rw console=ttyS0,115200</cmdline> <boot dev='hd'/> </os> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/bin/qemu-system-ppc</emulator> <controller type='usb' index='0'/> <controller type='pci' index='0' model='pci-root'/> <serial type='pty'> <target port='0'/> </serial> <console type='pty'> <target type='serial' port='0'/> </console> <memballoon model='virtio'> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </memballoon> </devices> </domain> Best Regards, Olivia

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[libvirt-users] qemu+tls question
by Fl＠sh 10 Jul '14

10 Jul '14

I`m generate TLS-certificates for my libvirtd and remote, useing http://wiki.libvirt.org/page/TLSSetup . >From console connect to remote host is success, but from virt-manager -- no: Unable to connect to libvirt. Unable to read TLS confirmation: Input/output error Verify that the 'libvirtd' daemon is running on the remote host. Libvirt URI is: qemu+tls://<remote_host>/system Traceback (most recent call last): File "/usr/share/virt-manager/virtManager/connection.py", line 1056, in _open_thread self._backend.open (self._do_creds_password) File "/usr/share/virt-manager/virtinst/connection.py", line 158, in open open_flags) File "/usr/lib64/python2.7/site-packages/libvirt.py", line 102, in openAuth if ret is None:raise libvirtError('virConnectOpenAuth () failed') libvirtError: Unable to read TLS confirmation: Input/output error Any suggestions? -- Fl@sh

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[libvirt-users] Disk and Network Statistics for a Specific Interval
by Sijo Jose 10 Jul '14

10 Jul '14

Hi, virDomainInterfaceStats - This function returns network interface stats for interfaces attached to the domain. virDomainBlockStats- This function returns block device (disk) stats for block devices attached to the domain. Based on which time interval these function returns values. Is it cumulative from the vms uptime..? OR average ...? How can I get the average statistics of Disk and Network for a specific time interval say time x to time y ..? Regards -Sijo

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[libvirt-users] memoryStats question
by Gleb Voronich 09 Jul '14

09 Jul '14

Hello, I'm trying to get memory usage statistic inside a guest machine using virDomainMemoryStats function at libvirt. According to http://libvirt.org/html/libvirt-libvirt.html#virDomainMemoryStatTags the structure could have a lot of useful memory statistic but the amount of parameters depends on the hypervisor and the driver. However using KVM I'm able to get VIR_DOMAIN_MEMORY_STAT_ACTUAL_BALLOON and VIR_DOMAIN_MEMORY_STAT_RSS only. Am I right it is not possible to get additional info such as used/unused memory inside a guest machine in case of KVM?

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[libvirt-users] Libvirt 1.2.6 patch for Hyper-V 2012 R2 ?
by Evgeny Vasilchenko 09 Jul '14

09 Jul '14

Hello, Does anyone know if the below patch for libvirt 1.2.4 has been integrated into the libvirt 1.2.6 source code? http://www.redhat.com/archives/libvir-list/2014-May/msg00509.html https://github.com/vikhyath/libvirt-hyperv-r2-2012 Thank you! Evgeny

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[libvirt-users] libvirt behind stunnel4
by Parthipan 09 Jul '14

09 Jul '14

Hi, I'm trying this setup where an stunnel4 (listening for clients on port 16514) connects to an unencrypted libvirt backend (on port 16509). When I point the virsh client to stunnel4 it hangs. Looking via tshark: 1. virsh completes ssl handshake with stunnel4 2. stunnel4 completes tcp handshake with libvirt. and that's all. When connecting virsh client directly to libvirt (this time encrypted) tshark shows: 1. virsh completes ssl handshake with libvirt (change cypher spec at the end) 2. libvirt sends something (I can't decode what libvirt sends, since DH key exchange is used.) Anyway my question really is, can libvirt be run as an unencrypted backend behind an ssl offloader such as stunnel4? If people do use it like that, then I can look for any setup issues in mine. My package versions: libvirt: 1.2.2-0ubuntu13.1 stunnel4: 3:4.53-1.1ubuntu1 Thanks ~parthi

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[libvirt-users] How to get uuid info inside a lxc container created by libvirt_lxc
by Qiang Guan 08 Jul '14

08 Jul '14

Hi , Is there anyway to get uuid info inside a lxc container which is created by libvirt_lxc? For kvm, we can use dmidecode or lshw to get this info inside vm. Is there any tools to do this thing for libvirt lxc? Thanks for any help~ -- ------------ Jackie Best Regards

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[libvirt-users] follow-up to thread : Acces to hypervisor from a KVM guest, ( by the way , how to enter a follow up in a thread ?) Thx
by Jean-Pierre Ribeauville 08 Jul '14

08 Jul '14

Hi, This is what I tried : Y , how enter an answer in the thread ?) virsh -c qemu+ssh://127.0.0.1:22/system hostname root(a)127.0.0.1's<mailto:root@127.0.0.1's> password: error: End of file while reading data: : Input/output error error: failed to connect to the hypervisor In another hand ,as we have few information to share , I was thinking to use a virtio channel to dialog between host and guest . Does it fit ? Thx J.P. ? -----Message d'origine----- De : Eric Blake [mailto:eblake@redhat.com] Envoyé : vendredi 4 juillet 2014 15:20 À : Jean-Pierre Ribeauville; libvirt-users(a)redhat.com<mailto:libvirt-users@redhat.com> Objet : Re: [libvirt-users] Acces to hypervisor from a KVM guest On 07/04/2014 04:23 AM, Jean-Pierre Ribeauville wrote: > Hi, > >>From a KVM guest, I want to retrieve the hostname of the host on which the hypervisor is running. > Before doing that by using libvirt API, I first try via virsh. Well, virsh just uses the libvirt API under the hood. I'd suggest that you try: virsh -c qemu://host/system hostname except that this is a chicken-and-egg situation, because virsh in the guest doesn't know what host to connect to. If you are using the out-of-the-box NAT setup, then you could use qemu://192.168.122.1/system, since your guest will be using an IP address assigned from that subnet from the host. Other than that, libvirt is not really designed for guest-to-host communication, but for host management of guests. You'll have to solve your problem in some other way. Consider the same situation with bare metal hosts - if you are provisioning a cluster, and want machines in the cluster to communicate to a particular controller, but not all machines connect to the same controller, how would you do that? If you can solve that problem, then you can use it to solve your guest provisioning problem. > error: Failed to reconnect to the hypervisor > error: no valid connection > error: internal error Unable to locate libvirtd daemon in /usr/sbin > (to override, set $LIBVIRTD_PATH to the name of the libvirtd binary) This failure is because you did not use -c to connect to a remote daemon, but don't have libvirtd running in the guest. You do not need libvirtd running locally to use virsh for remote connections, but you do need to know where the remote connection lives. -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org [cid:image001.png@01CF75CE.35F97F50] Jean-Pierre RIBEAUVILLE Developer Tel: 01 49 11 45 81 Discover Systar's Videos!<https://www.youtube.com/channel/UCvyaJkMXCGFo8_XZYd9rcBw> P Please consider the environment before printing this e-mail

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[libvirt-users] getting CPU usage through virsh command or libvirt API
by Restituto Marcus Arevalo 08 Jul '14

08 Jul '14

Hi, Is it possible to get the CPU usage of a guest through a virsh command? I have tried almost all the commands (vcpuinfo, cpu-stats, etc.) that gets the details of a guest cpu, but it only returns the cpu time. Is there any command that returns the cpu usage (just like the graph that virt-manager displays) of a guest? Or do I have to create a program using libvirt API? Thanks in advance. regards, Marco

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[libvirt-users] qemu-kvm version for CentOS
by kerwin 08 Jul '14

08 Jul '14

WHY CentOS still using qemu-kvm 0.12? What I am need is high version of qemu-kvm for CentOS, but seems like they do not officially provide newest qemu, only qemu 0.12 source code with 3522 patched rpm package. Is there any reasonable to keep low version for qemu-kvm ? or what should I do if I need newest qemu-kvm rpm package? ✉ -- 朴元奎 kerwin

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[libvirt-users] virsh: cannot start domain with channel device,
by John 07 Jul '14

07 Jul '14

Here is what I got. root ubuntu:/home/john# virsh start ubuntu2 error: Failed to start domain ubuntu2 error: internal error Process exited while reading console log output: char device redirected to /dev/pts/1 bind(unix:/var/lib/libvirt/qemu/ubuntu2.libguestfs): Permission denied chardev: opening backend "socket" failed: Permission denied root ubuntu:/home/john# ll /var/lib/libvirt/qemu/ total 20 drwxr-x--- 5 libvirt-qemu kvm 4096 Jul 5 14:44 ./ drwxr-xr-x 8 root root 4096 May 20 04:18 ../ drwxr-xr-x 2 libvirt-qemu kvm 4096 May 20 04:18 dump/ drwxr-xr-x 2 libvirt-qemu kvm 4096 May 20 04:18 save/ drwxr-xr-x 2 libvirt-qemu kvm 4096 May 20 04:18 snapshot/ root ubuntu:/home/john# cat /etc/libvirt/qemu/ubuntu2.xml  <domain type='kvm' xmlns:qemu='/schemas/domain/qemu/1.0'> <qemu:commandline> <qemu:arg value='-s'/> </qemu:commandline> <name>ubuntu2</name> <uuid>03f4c36d-9509-05dd-167d-d2613d1dd883</uuid> <memory>1024000</memory> <currentMemory>1024000</currentMemory> <vcpu>1</vcpu> <os> <type arch='x86_64' machine='pc-1.0'>hvm</type> <boot dev='hd'/> </os> <features> <acpi/> <apic/> <pae/> </features> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <devices> <emulator>/usr/bin/kvm</emulator> <disk type='file' device='disk'> <driver name='qemu' type='qcow2'/> <source file='/home/john/ubuntu-1204-vm.img'/> <target dev='hda' bus='ide'/> <address type='drive' controller='0' bus='0' unit='0'/> </disk> <controller type='ide' index='0'> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> </controller> <interface type='bridge'> <mac address='52:54:00:d4:7d:07'/> <source bridge='br0'/> <model type='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> <serial type='pty'> <target port='0'/> </serial> <console type='pty'> <target type='serial' port='0'/> </console> <input type='mouse' bus='ps2'/> <graphics type='vnc' port='-1' autoport='yes'/> <sound model='ich6'> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </sound> <video> <model type='cirrus' vram='9216' heads='1'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> <memballoon model='virtio'> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> </memballoon> <channel type='unix'> <source mode='bind' path='/var/lib/libvirt/qemu/ubuntu2.libguestfs' /> <target type='virtio' name='org.libguestfs.channel.0' /> </channel> </devices> </domain> When I deleted the <channel>...</channel> part, it will start normally. But I need it to use guestfish with --live option. No SELinux or AppArmor is used. qemu.conf shows it's running by root user. I did "virsh start" operation under root and the error remains. Should I change the permission attributes of files under /var/lib/libvirt/qemu ?

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[libvirt-users] Source code of virt-manager
by Restituto Marcus Arevalo 07 Jul '14

07 Jul '14

Hi, Does anyone know where I could view the source code of virt-manager? Because I'm trying to learn how the virt-manager gets the CPU usage of a VM(the graph it displays). I'm trying to make a program using java that gets the CPU usage of a VM in KVM. Anybody have suggestions on where I could start?Thanks regards, Marco

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[libvirt-users] virsh blockcopy: doesn't seem to flatten the chain by default
by Kashyap Chamarthy 05 Jul '14

05 Jul '14

Versions -------- (Libvirt locally built from a recent git commit -ec7b922): $ rpm -q libvirt-daemon-kvm qemu-system-x86 libvirt-daemon-kvm-1.2.6-1.fc20.x86_64 qemu-system-x86-2.0.0-1.fc21.x86_64 Test ---- [All images are qcow2 files.] We have this simple chain: base <- snap1 Let's quickly examine the contents of 'base' and 'snap1' images: 'base' has just a single file: foo $ guestfish --ro -a base.qcow2 [. . .] ><fs> ls / ><fs> run ><fs> mount /dev/sda1 / ><fs> ls / foo lost+found ><fs> quit 'snap1' has files: bar, baz, jazz $ guestfish --ro -a snap1.qcow2 [. . .] ><fs> run ><fs> mount /dev/sda1 / ><fs> ls / bar baz jazz lost+found ><fs> Now, let's do a live blockcopy (with a '--finish' to graecully finish the mirroring): $ virsh blockcopy --domain testvm2 vda \ /export/dst/copy.qcow2 \ --wait --verbose --finish Examine the contents of the above 'copy': $ guestfish --ro -a copy.qcow2 [. . .] ><fs> run ><fs> mount /dev/sda1 / ><fs> ls / bar baz jazz lost+found ><fs> quit If I'm reading the man page of 'blockcopy' correctly, shouldn't it 'flatten' the entire chain, by also copying the contents of base into copy.qcow2? i.e. the 'copy' should have files (including the file foo from 'base': foo, bar, baz, jazz True or false? PS: I've tested the cases of --pivot, --shallow and --reuse-external, will post my notes about them on a wiki. -- /kashyap

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[libvirt-users] Acces to hypervisor from a KVM guest
by Jean-Pierre Ribeauville 04 Jul '14

04 Jul '14

Hi, >From a KVM guest, I want to retrieve the hostname of the host on which the hypervisor is running. Before doing that by using libvirt API, I first try via virsh. So, I run virsh and the run hostname command.( got that in virsh help : .... hostname print the hypervisor hostname ....) Unfortunately, I got following error when starting virsh : error: Failed to reconnect to the hypervisor error: no valid connection error: internal error Unable to locate libvirtd daemon in /usr/sbin (to override, set $LIBVIRTD_PATH to the name of the libvirtd binary) Do I miss to install some package on my KVM guest ? or is it not the right way to get this information ? Any help is welcome. Thx. [cid:image001.png@01CF75CE.35F97F50] Jean-Pierre RIBEAUVILLE Developer Tel: 01 49 11 45 81 Discover Systar's Videos!<https://www.youtube.com/channel/UCvyaJkMXCGFo8_XZYd9rcBw> P Please consider the environment before printing this e-mail

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[libvirt-users] os/type/machine/pc-xxxx meaning ? following live migration issue after an upgrade
by Benoit Rousselle 04 Jul '14

04 Jul '14

Dear All, I have upgrade my hypervisors: qemu-kvm 0.12.5 => 1.1.2 libvirt-bin 0.8.3-5 => 0.9.12.3 (debian6 to debian7) After that upgrade, i noticed that live migration was most of the time failing (freeze) (not always) I also noticed that creating a machine with the updated hypervisor was always working. After some days of investigation mainly on network side, i found this setting that seems to fix the issue in the xml: <os> <type arch='x86_64' machine='pc-0.12'>hvm</type> <boot dev='hd'/> </os> replacing pc-0.12 with pc-1.1 seems to fix the issue. Here are my questions : 1) what is the meaning/purpose of that setting ? (i guess it is somehow linked to the version of kvm ;) ) 2) can i just change it in all xmls ? ( i have plenty of linux/windows flavors running in my vms) 3) is it possible to put a more generic value? So we don't have the same issue on next upgrade. 4) Is there a script/doc that explains what needs to be done on the vm itself (xml or other) when we upgrade libvirt/kvm ? Thanks for the feedback ! Benoit. -- Benoit Rousselle

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[libvirt-users] getting CPU usage of VMs through libvirt
by Restituto Marcus Arevalo 04 Jul '14

04 Jul '14

Greetings everyone, I just want to ask if it is possible to get the CPU usage of the VMs in KVM through libvirt? I mean, how does the virt-manager produce the graph it displays? Is there a way get this graph? But instead of the graph itself, I just need to get it in percentage(%) form. I'd like to know how. Thank you and your help will be greatly appreciated. regards, Marco

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[libvirt-users] Domain Storage type
by Sijo Jose 04 Jul '14

04 Jul '14

Hi, How can we identify a domain is using Shared storage OR Non shared storage using libvirt -API? Rgds -Sijo

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[libvirt-users] How can I setup a privileged container
by WANG Cheng D 03 Jul '14

03 Jul '14

Dear all, I want to setup a privileged container, which means I can set the priority of a process to SCHED_RR (real-time) dynamically by calling sched_setscheduler() in a C program running on a container. In my system (host: fedora19, container: fedora19, libvirt 1.2.5), my C code reports "operation not permitted" when sched_setscheduler() is called. I found a link (https://www.redhat.com/archives/libvir-list/2014-June/msg00562.html) which is talking about container capability drops and keeps, but only "nice" is mentioned and I don't know how to turn on "priority" feature on a container? Any comments are highly appreciated. Cheng

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[libvirt-users] all windows vm could not start because the following file is missing or corrupt
by Lucas -LandM- 02 Jul '14

02 Jul '14

Hi, After some problems in the server I can't start windows XP virtual machines. - Yesterday we got full disk (100%). I deleted some files. Solved. - I update Centos 5.6. I guess libvirt was updated from 0.9 to 0.10. We have to use this kernel: 2.6.32-042stab079.6 because this bug is not in the release: https://bugzilla.openvz.org/show_bug.cgi?id=2915 Now, I try to start windows XP machines and all give me same error could not start because the following file is missing or corrupt c:\WINDOWS\SYSTEM32\CONFIG\SYSTEM If this error were in a particular VM I try to solve it manually, but same error in three diferent VM is not a coincidence. I suppose it is a upgrade issue. What should I do? Thanks in advanced, Lucas

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[libvirt-users] changing the priority of a process in the container is not permitted
by WANG Cheng D 02 Jul '14

02 Jul '14

Dear all, I want to run a process in a container with a real-time (RT) priority. When the sched_setscheduler(0, SCHED_RR, &sparam) is called in the container, an error is reported which is "operation not permitted" I had added the following line in the file /etc/security/limits.conf for both the host and the container, which means allowing all users to change the priority of the process, but it still doesn't work. * - rtprio 100 I wonder how to change the privilege of a container so that it has the similar privilege of the root user of the host. Thank you in advance Cheng

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[libvirt-users] Libvirt installion error: You must install the libyajl library & headers to compile libvirt
by WANG Cheng D 02 Jul '14

02 Jul '14

Dear all, I am installing the libvirt 1.2.5 on my newly installed Fedora19. When I run ./configure, an error is reported: "You must install the libyajl library & headers to compile libvirt" In fact, the package yajl-2.0.4-2fc19.x86_64.rpm has been installed on the fedora19. I found several links talking about this error and I downloaded 3 files (configure.ac, m4/virt-yajl.m4, src/qemu/qemu_capabilities.c) from the link given by Daniel Berrange (http://libvirt.org/git/?p=libvirt.git;a=commit;h=654c709baaa6fdcff6b6d38abb…) , but it does not work. Am I missing something? Best regards, Cheng

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[libvirt-users] virsh update-device issues
by Oleg Bondarev 02 Jul '14

02 Jul '14

Hi, I faced a couple of issues with libvirt update-device function: 1. http://libvirt.org/hvsupport.html says that virDomainUpdateDeviceFlags is supported since 0.8.0 API version in qemu driver. However when trying to update network device (changing source bridge of the interface) on Ubuntu with 0.9.8 libvirt version I get the following error: "*this function is not supported by the connection driver: cannot modify network device configuration"* What may be the reason for such error? 2. Not able to rename target device name of an interface. For example if have running instance with interface: * <interface type='bridge'>* * <mac address='fa:16:3e:80:f4:49'/>* * <source bridge='qbre1894135-13'/>* * <target dev='vnet0'/>* * <model type='virtio'/>* * <alias name='net0'/>* * <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>* * </interface>* and then try to update: *$ sudo virsh update-device --persistent --config --live 1 dev.xml* where dev.xml: * <interface type='bridge'>* * <mac address='fa:16:3e:80:f4:49'/>* * <source bridge='qbre1894135-13'/>* * <target dev='tap123'/>* * <model type='virtio'/>* * </interface>* I get: * error: Failed to update device from dev.xml* * error: Operation not supported: cannot modify network device tap name* This happens even if rename vnet0 to tap123 manually with *ip link set vnet0 name tap123* before interface update. And after instance reboot tap123 is renamed back to vnet0. Is there a strong reason to not allow modifying network device tap name? Will appreciate any assistance with the described issues. Thanks, Oleg

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