- Users - libvirt List Archives

[libvirt-users] File option for smbios.
by Julio Faracco 19 Oct '17

19 Oct '17

Hi guys, Does anybody knows if there is an option to set a binary file for smbios? Currently, I'm doing this approach: <qemu:commandline> <qemu:arg value='-smbios'/> <qemu:arg value='file=/var/run/libvirt/qemu/smbios_type_1.bin'/> </qemu:commandline> Has libvirt a method as <smbios mode='host'/> ? -- Julio Cesar Faracco

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[libvirt-users] virConnectIsAlive
by llilulu 17 Oct '17

17 Oct '17

Hi In my program , When libvirtd restart , the old libvirtd connection(virConnectPtr) has to reconnect, Before usr old virConnectPtr , I call virConnectIsAlive. but when I restart libvirtd , virConnectIsAlive return 1, and I continue other operate use the old virConnectPtr, program will receive signal pipe. I use libvirt event. before any api use, I call virEventRegisterDefaultImpl, and run virEventRunDefaultImpl. then use virConnectIsAlive, when I restart libvirtd, virConnectIsAlive will return 0, I want know how to use virConnectIsAlive， if virConnectIsAlive use keep alive message, what default the interval and count. Thanks

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[libvirt-users] should not libvirtd when stopped dismantle/remove net connections
by lejeczek 13 Oct '17

13 Oct '17

hi, I stop libvirsh and I see it removes vnetx interfaces, but those(at least) of bridge type remain in the system after daemon is stopped. Is this intended would you know? thanks, L.

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[libvirt-users] add/attache vol from pool - without xml ?
by lejeczek 12 Oct '17

12 Oct '17

hi fellows is that possible, as per subject? If yes then how would such a command like look like? many thanks, L.

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[libvirt-users] error: internal error: missing backend for pool type 11 (zfs)
by Nick Gilmour 05 Oct '17

05 Oct '17

Hi all, I'm trying to setup virt-manager with ZFS als storage on my Arch box. I have created a pool named virt-pool and tried to use it as storage. First with virt-manager and then in the terminal with virsh but I'm always getting the following errors: *virsh # pool-define-as --name zfsvirtpool --source-name virt-pool --type zfserror: Failed to define pool zfsvirtpoolerror: internal error: missing backend for pool type 11 (zfs)* But ZFS seems to be working fine: # zpool status pool: virt-pool state: ONLINE scan: none requested config: NAME STATE READ WRITE CKSUM virt-pool ONLINE 0 0 0 x ONLINE 0 0 0 errors: No known data errors libvirt and VMM also. These are the installed versions: Virtual Machine Manager v.1.4.3 virsh v.3.7.0 libvirtd (libvirt) 3.7.0 I have found that there was a bug last year which is supposed to be fixed: *https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=827245 <https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=827245>* So why I'm getting this error. Is something wrong with my setup? Regards, Nick

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[libvirt-users] virDomainSaveImageDefineXML
by llilulu 02 Oct '17

02 Oct '17

Hi: When I make snapshot use virDomainSave,before I resume the snapshot , I use virDomainSaveImageDefineXML change the domain info, like disk path. but I can't change the <devices> , for example detach a disk or interface, Can't tell me what can I change use virDomainSaveImageDefineXML before resume snapshot.

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[libvirt-users] domain xml <video> doubt
by llilulu 27 Sep '17

27 Sep '17

Hi My libvirt is 3.4.0,When I create a kvm domain, I use default <video> (type=cirrus, I not set video) create guest(debian9.1.0), but when finish install the guest and reboot, the guest will block in "started update utmp about system runlevel changes", I search on Internet, and find is graphics card problem, I change the <video> type=vga, the problem disppear。The domain xml docs say， I can set type=qxl, ...， but qemu -vga args has other type support, (qemu --help, -vga [std|cirrus|qxl....), I want to know how I use other <video> type in my domain xml. Thanks very!!!

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[libvirt-users] Rollback to running VM
by Jackson, Gary L. 27 Sep '17

27 Sep '17

I would like to make a snapshot of a running VM, let it continue to run after the shapshot, and then at some later time roll back the VM to that previous running state. Can I do that with libvirt? If so, how? I understand that this will cause all kinds of havoc with things like ongoing TCP connections, and I accept that risk. -- Gary Jackson

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[libvirt-users] How could I set a VNC server's screen size?
by 刘磊 23 Sep '17

23 Sep '17

Dear Libvirt, How could I set a VNC server’s screen size? I access my virtual machine via NoVNC from web browser, but the desktop’s size is different based on OS. For example, A RHEL5’s screen is about half of RHEL7’s. But it has same graphics configuration. I read the online doc, but I don’t find any to set this. So could you help me? Thanks for your reply. Best Regards, Clark Liu

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[libvirt-users] How automatically set group.devices.allow for libvirt-lxc container after start ?
by mxs kolo 22 Sep '17

22 Sep '17

Hi. I need to use /dev/ppp inside the lxc container, for very ancient software. Problem solved this way: 1) virsh edit container name and add section: <features> <capabilities policy='default'> <mknod state='on'/> </capabilities> </features> 2) start container 3) attach or ssh container, be root: #mknod /dev/ppp c 108 0 4) inside container (or from hardware node, no difference) run: # echo "c 108:0 rwm" > /sys/fs/cgroup/devices/machine.slice/machine-lxc\\x2d${PID}\\x2d${CONTAINER_NAEM}scope/devices.allow 5) Now pppd work inside lxc: #pppd call reuters debug nodetach using channel 1 Using interface ppp0 Connect: ppp0 <--> /dev/pts/2 sent [LCP ConfReq id=0x1 <mru 1000> <asyncmap 0x0> <magic 0x567d90ae>] ... But such method has several drawbacks. 1) I do not want to give cap_mknod, no need extra holes. With cap_mknod you can make /de/block_device and using device.allow to give it the rights rwm. 2) libvirt-lxc has some analog of lxc/lxd options lxc.group.devices.allow ? lxc.cgroup.devices.allow = c 108:0 rwm And yes, I need run "mknod" and "echo" each time after container restart and before start pppd daemon inside. p.s. It would be nice specify any device in the xml domain config, for example: <devices> <device type='char' maj='108' min='0' allow='rwm' name="/dev/ppp"/> </devices> At start libvirt executes mknod and then writes the necessary rights to cgroups device.allow. b.r. Maxim Kozin

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