- Users - libvirt List Archives

[libvirt-users] Descriptions of mdev types?
by Milan Zamazal 20 Nov '19

20 Nov '19

Hi, when retrieving an mdev device info using `virsh nodedev-dumpxml' or the libvirt API, something like the following is returned: <capability type='mdev_types'> <type id='nvidia-210'> <name>GRID M60-2B4</name> <deviceAPI>vfio-pci</deviceAPI> <availableInstances>4</availableInstances> </type> ... </capability> Besides device_api, available_instances and (optional) `name', `description' of the given mdev type may be optionally provided in /sys/.../mdev_supported_types/... for each of the available mdev types. I can see in the sources that libvirt doesn't try to retrieve it -- is it intentionally or is it just an omission? If the latter, could it be added, please? It looks like a useful piece of information for the user to get an idea what the given mdev type means. Thanks, Milan

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[libvirt-users] libvirt_lxc memory limit, emulator process part of the cgroup?
by Maximilian Philipps 14 Nov '19

14 Nov '19

hi, I am currently investigating a bug with libvirt lxc. Whenever I do a systemctl daemon-reload on the host, my container loses his memory limit and then reports having access to 8 exabyte of memory. I have tracked the issue down to two parts: memory.limit_in_bytes jumps from the correct value to 9223372036854771712. libvirt lxc appears to set the memory limit in transient way without writing a config for systemd. I can't prevent memory.limit_in_bytes changing by setting the correct value through systemctl set-property --runtime <scope> MemoryLimit= tasks in the memory cgroup gets cleaned up. After starting the container the cgroup contains 3 pid. The pid of the libvirt_lxc process, the pid of the init process in the container and third unknown pid that doesn't exists in /proc/. After a demon-reload only the init process remains in the cgroup and unless I move the libvirt_lxc process into the cgroup the memory limit isn't enforced. I have also noticed that when starting libvirtd it complains about GetMachineByPID failing for the libvirt_lxc process. This leaves me with one big question, the the emulator process libvirt_lxc supposed to be part of the container's cgroup or not? The leader of the container is the init process in the container. I am unsure on how the additional emulator process is supposed to be registered. Using: Debian Stretch, libvirt 5.0.0-4, systemd 241-7~deb10u1 and hybrid cgroups. Regards, Maximilian Philipps

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[libvirt-users] Understanding the use of virt-install from the CLI (Linux)
by jonetsu 07 Nov '19

07 Nov '19

Hello, I've created several VMs using virt-manager and am using them. This time around though, I'd like to use the CLI approach. The problem resides in defining a storage space. This is using virt-install 1.5.1 on Xubuntu 18.04. For the occasion I created a new directory to store images. So I specify this new directory: virt-install \ --name=arch01 \ --disk path=/Share2/KVMImages/arch01.qcow2 \ --disk size=10 \ [ ... ] The above will not work as it reports: 'must be a file or a device, not a directory' So I specify a file: [ ... ] --disk path=/Share2/KVMImages/arch01.qcow2 \ --disk size=10 \ [ ... ] And it reports: 'Size must be specified for non existent volume 'arch01.qcow2'' But the size is already specified as one of the options. This is where I'm puzzled about the process. What is going on ?

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[libvirt-users] Where can I find the slirp-helper?
by Han Han 07 Nov '19

07 Nov '19

For the libvirt 5.8 release, I find that there is a new comment in qemu.conf: #slirp_helper = "/usr/bin/slirp-helper" It indicates that there is a slirp-helper to help setup slirp network. But I cannot find it even after I built the latest qemu(v4.1.0-1378-g98b2e3c9ab) and libvirt (v5.9.0-rc1-2-g73f91d659b). Could you please tell me where I can find that helper program? Thanks -- Best regards, ----------------------------------- Han Han Quality Engineer Redhat. Email: hhan(a)redhat.com Phone: +861065339333

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[libvirt-users] 32 bit support
by Phill. Whiteside 04 Nov '19

04 Nov '19

Hi good people, I've got a bit of a weird issue. I'm using QEMU emulator version 2.11.1(Debian 1:2.11+dfsg-1ubuntu7.19) And after some considerable time of not using it for 32bit installations I now find that it can no longer install some older 32 bit installations (e.g. https://phillw.net/isos/lubuntu/natty/ ) The CPU goes to 100% and then after a while it just stops (I'm using virt-manager v1.5.1) I'm running lubuntu 18.04 (64 bit) on an i7 chipset that runs 64 bit debian / centos and MS server 2019 KVM instances via virt-manager without problems. Any pointers would be appreciated, Phill.

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[libvirt-users] It takes long time to start kvm virtual machine with nwfilter in docker container.
by John Y. 04 Nov '19

04 Nov '19

1. It takes minutes to start the virtual machine when I add "filterref" to libvirt.xml and run command "virsh start vm1". It also takes minutes to destroy the virtual machine. <interface type="bridge"> <mac address="fa:16:3e:fa:f7:94"/> <target dev="tap69e948b0-bf"/> <source bridge="br02"/> <model type="virtio"/> <filterref filter="no-arp-spoofing"> <parameter name="IP" value="192.168.2.2"/> <parameter name="MAC" value="fa:16:3e:fa:f7:94"/> </filterref> </interface> 2. I found some logs in /var/log/libvirt/libvirtd.log 2019-11-04 03:46:18.495+0000: 15257: info : virFirewallApplyRule:815 : Applying rule '/usr/sbin/ebtables --concurrent -t nat -D PREROUTING -i tap69e948b0-bf -j libvirt-J-tap69e948b0-bf' 2019-11-04 03:46:18.495+0000: 15257: debug : virCommandRunAsync:2499 : About to run /usr/sbin/ebtables --concurrent -t nat -D PREROUTING -i tap69e948b0-bf -j libvirt-J-tap69e948b0-bf 2019-11-04 03:46:18.496+0000: 15257: debug : virFileClose:111 : Closed fd 24 2019-11-04 03:46:18.496+0000: 15257: debug : virFileClose:111 : Closed fd 26 2019-11-04 03:46:18.496+0000: 15257: debug : virFileClose:111 : Closed fd 29 2019-11-04 03:46:18.496+0000: 15257: debug : virCommandRunAsync:2502 : Command result 0, with PID 16291 2019-11-04 03:46:19.242+0000: 15257: debug : virCommandRun:2350 : Result invalid value 255, stdout: '' stderr: '2019-11-04 03:46:19.239+0000: 16291: debug : virFileClose:111 : Closed fd 26 2019-11-04 03:46:19.239+0000: 16291: debug : virFileClose:111 : Closed fd 29 2019-11-04 03:46:19.239+0000: 16291: debug : virFileClose:111 : Closed fd 24 Illegal target name 'libvirt-J-tap69e948b0-bf'. ' 2019-11-04 03:46:19.242+0000: 15257: debug : virFirewallApplyRuleDirect:704 : Ignoring error running command 2019-11-04 03:46:19.242+0000: 15257: debug : virFileClose:111 : Closed fd 25 2019-11-04 03:46:19.243+0000: 15257: debug : virFileClose:111 : Closed fd 28 2019-11-04 03:46:19.243+0000: 15257: info : virFirewallApplyRule:815 : Applying rule '/usr/sbin/ebtables --concurrent -t nat -D POSTROUTING -o tap69e948b0-bf -j libvirt-P-tap69e948b0-bf' 2019-11-04 03:46:19.243+0000: 15257: debug : virCommandRunAsync:2499 : About to run /usr/sbin/ebtables --concurrent -t nat -D POSTROUTING -o tap69e948b0-bf -j libvirt-P-tap69e948b0-bf 2019-11-04 03:46:19.243+0000: 15257: debug : virFileClose:111 : Closed fd 24 2019-11-04 03:46:19.243+0000: 15257: debug : virFileClose:111 : Closed fd 26 2019-11-04 03:46:19.244+0000: 15257: debug : virFileClose:111 : Closed fd 29 2019-11-04 03:46:19.244+0000: 15257: debug : virCommandRunAsync:2502 : Command result 0, with PID 16292 2019-11-04 03:46:19.990+0000: 15257: debug : virCommandRun:2350 : Result invalid value 255, stdout: '' stderr: '2019-11-04 03:46:19.986+0000: 16292: debug : virFileClose:111 : Closed fd 26 2019-11-04 03:46:19.986+0000: 16292: debug : virFileClose:111 : Closed fd 29 2019-11-04 03:46:19.986+0000: 16292: debug : virFileClose:111 : Closed fd 24 Illegal target name 'libvirt-P-tap69e948b0-bf'. ' 2019-11-04 03:46:19.990+0000: 15257: debug : virFirewallApplyRuleDirect:704 : Ignoring error running command 2019-11-04 03:46:19.990+0000: 15257: debug : virFileClose:111 : Closed fd 25 2019-11-04 03:46:19.990+0000: 15257: debug : virFileClose:111 : Closed fd 28 3. It works fine on hosts. 4. It works fine in other host's libvirt container. How can I solve this problem? Best regards, John

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[libvirt-users] Memory ballooning
by Mauricio Tavares 31 Oct '19

31 Oct '19

So I as I was searching for the difference between memory and currentMemory, I bumped into http://www.espenbraastad.no/posts/memory-ballooning/ Is the problem this ancient post mention still an issue?

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[libvirt-users] win10 vm stuck in automatic repair
by Jack Kamm 27 Oct '19

27 Oct '19

Hello, I have a Windows 10 guest, when I boot it, it goes in to Automatic Repair mode, and after some time reports it was unable to repair the PC. This is from an older snapshot ("snapshot1"), and if I try switching back to a more recent snapshot ("snapshot2"), libvirt reports that it can't find the snapshot: > libvirt.libvirtError: internal error: Child process (/usr/bin/qemu-img > snapshot -a snapshot2 /var/lib/libvirt/images/win10.qcow2) unexpected > exit status 1: qemu-img: Could not apply snapshot 'snapshot2': Failed > to load snapshot: Invalid argument Does anyone have any ideas why this might have happened, or any suggestions for how I can go about diagnosing/fixing this? This was a pretty simple Windows 10 VM, that I used for Microsoft Office. Everything was managed through virt-manager and most settings left at the original defaults. Thanks, Jack

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[libvirt-users] Reg: Adding "edu" device using XML file
by bharath paulraj 24 Oct '19

24 Oct '19

Hi Team, I am exploring "edu" device in QEMU to add my own custom device. I am able to add the device using the command line. Would it be possible to add the device using XML file through libvirt? -- Regards, Bharath

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[libvirt-users] X11 apps on lxc
by Jesus 21 Oct '19

21 Oct '19

Hi How can I run X11 apps on the local X11 using libvirt lxc? I already had this runing on centos 7 but I upgraded to centos 8 (I rebuild libvirt) and the socket is not in the /tmp/.X11-unix/ folder of the vm any more. Can somebody help with this? Thanks!!

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