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[libvirt-users] Why cannot block copy local storage to network disk
by wyang 26 Jul '17

26 Jul '17

Hi, guys I was executing the following command to lively migrate local storage to network storage, [root@192-168-152-51 ~]# virsh blockcopy a75056a4-44e0-4b97-bc77-78142ee17038 vda —xml rbd.xml —wait —verbose —pivot error: argument unsupported: non-file destination not supported yet but I get the following error: error: argument unsupported: non-file destination not supported yet I check my libvirt source code, and find the following code sniff in /qemuDomainBlockCopyCommon/ function |if (!virStorageSourceIsLocalStorage(mirror)) { virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s", _("non-file destination not supported yet")); } | it was introduced by Eric. commit e53ee6c123321a1775ef3b36e15a5fa351d10fe4 Author: Eric Blake eblake(a)redhat.com <http://mailto:eblake@redhat.com> Date: Fri Aug 29 16:30:46 2014 -0600 blockcopy: tweak how rebase calls into copy So my question is that why we cannot block copy to network storage? Thanks Wei

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[libvirt-users] About seclabel configure,Migrate error
by 露露 25 Jul '17

25 Jul '17

libvirt version: 3.4.0 architecture: x86_64 ubuntu16.04-server hypervisor: kvm,qemu When migrate vm, I encounter error: "Migrate VM virt21 failed unsupported configuration: Unable to find security driver for model apparmor" but two host are same environment.before this error, migrate can be success. the source host seclabel configure is this : <seclabel type='dynamic' model='apparmor' relabel='yes'> <label>libvirt-8e4ec209-17ca-4b59-abb7-72f3984244f3</label> <imagelabel>libvirt-8e4ec209-17ca-4b59-abb7-72f3984244f3</imagelabel> </seclabel> I create a vm on the destination host ,the vm configure not seclabel congfigure. I reinstall libvirt on the destination host and migrate same vm, this error disappear.vm seclabel configure is default. I recreate a vm on the destination host ,the vm configure has the seclabel configure , I don't known the reason. Another question: I configure a vm xml's seclabel like this: <seclabel type='none' model='none'/> and then call virDomainCreate create the vm, call virsh dumpxml, the vm xml's seclabel is this: <seclabel type='none' model='none'/> <seclabel type='dynamic' model='dac' relabel='yes'> <label>+0:+0</label> <imagelabel>+0:+0</imagelabel> </seclabel> I don't the reason. Is a vm seclabel configure dynamic change when it running? Thanks

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[libvirt-users] how libvirt create virbr0
by 露露 25 Jul '17

25 Jul '17

libvirt version: 3.4.0 architecture: x86_64 ubuntu16.04-server hypervisor: kvm,qemu when install libvirt from ubuntu distribution deb install libvirt, a virtual bridge virbr0 will be create . But when I build libvirt from souce code, how can I create a virbr0. If I want create another virtual bridge ,How can I create and start the virtual bridge. Thanks

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[libvirt-users] transient configure turn to persistent configure
by 露露 25 Jul '17

25 Jul '17

libvirt version: 3.4.0 architecture: x86_64 ubuntu16.04-server hypervisor: kvm,qemu I call virDomainCreate create a transient vm, After a period of time ,I call virDomainDestroy, the vm configure is stil exist， the vm turn to persistent, I don't known the reason. Thanks

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[libvirt-users] memory snapshot save error
by 露露 25 Jul '17

25 Jul '17

libvirt version: 3.4.0 architecture: x86_64 ubuntu16.04-server hypervisor: kvm,qemu when I want make a memery snapshot for a vm ,and I call virsh save ,but tell me this error: error: Failed to save domain 177 to /datapool/mm.img error: operation failed: domain save job: unexpectedly failed xml configure: <domain type='kvm' id='177'> <name>virt23</name> <uuid>e50c1d59-c4a3-4413-b6c9-20e90cced343</uuid> <metadata/> <memory unit='KiB'>10485760</memory> <currentMemory unit='KiB'>10485760</currentMemory> <vcpu placement='static'>1</vcpu> <resource> <partition>/machine</partition> </resource> <os> <type arch='x86_64' machine='pc-i440fx-2.5'>hvm</type> <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/kvm</emulator> <disk type='file' device='disk'> <driver name='qemu' type='raw'/> <source file='/datapool/zhuohf/virt23.qcow2'/> <backingStore/> <target dev='vdc' bus='virtio'/> <alias name='virtio-disk2'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> </disk> <disk type='file' device='cdrom'> <driver name='qemu' type='raw'/> <source file='/datapool/zhuohf/ubuntu-16.04.2-desktop-amd64.iso'/> [40/38156] <backingStore/> <target dev='hdc' bus='ide'/> <readonly/> <alias name='ide0-1-0'/> <address type='drive' controller='0' bus='1' target='0' unit='0'/> </disk> <controller type='usb' index='0' model='piix3-uhci'> <alias name='usb'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/> </controller> <controller type='pci' index='0' model='pci-root'> <alias name='pci.0'/> </controller> <controller type='ide' index='0'> <alias name='ide'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> </controller> <interface type='network'> <mac address='52:54:00:e0:31:68'/> <source network='default' bridge='virbr0'/> <target dev='vnet11'/> <model type='rtl8139'/> <alias name='net0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> <input type='mouse' bus='ps2'> <alias name='input0'/> </input> <input type='keyboard' bus='ps2'> <alias name='input1'/> </input> <graphics type='vnc' port='5909' autoport='yes' listen='0.0.0.0'> <listen type='address' address='0.0.0.0'/> </graphics> <video> <model type='cirrus' vram='16384' heads='1' primary='yes'/> <alias name='video0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> <memballoon model='virtio'> <stats period='1'/> <alias name='balloon0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </memballoon> </devices> <seclabel type='none' model='none'/> <seclabel type='dynamic' model='dac' relabel='yes'> <label>+0:+0</label> <imagelabel>+0:+0</imagelabel> </seclabel> </domain> before I encounter the same error,that time is my disk not free space，but this time I can't find error reason. Thanks

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[libvirt-users] cannot set maxMemory
by 임영빈 20 Jul '17

20 Jul '17

Hi all, I'm testing the memory hotplugging on devstack (ocata version). According to the article in https://medium.com/@juergen_thomann/memory-hotplug-with-qemu-kvm-and-libvir… , I'm trying to create a virtual machine by setting <maxMemory>. However, I've got an error message in libvirt log as below. 2017-07-20 20:33:21.175+0000: 529: error : virDomainDefCheckUnsupportedMemoryHotplug:1192 : unsupported configuration: memory hotplug tunables <maxMemory> are not supported by this hypervisor driver virt-aa-helper: error: could not parse XML virt-aa-helper: error: could not get VM definition I'm using qemu hypervisor (2.8), and libvirt (2.5.0). As I know, these qemu, libvirt versions support hotplugging memory. Below is the xml file I used to create a virtual machine by using 'virsh create test.xml' command. <domain type='qemu'> <name>QEmu-fedora-i686</name> <uuid>c7a5fdbd-cdaf-9455-926a-d65c16db1809</uuid> <maxMemory slots='4' unit='KiB'>2097152</maxMemory> <memory>219200</memory> <currentMemory>219200</currentMemory> <vcpu>2</vcpu> <cpu> <numa> <cell id="0" cpus="0" memory="2097152" unit="KiB"/> </numa> </cpu> <driver name="qemu" type="qcow2" cache="none"/> <os> <type arch='i686' machine='pc'>hvm</type> <boot dev='cdrom'/> </os> <devices> <emulator>/usr/bin/qemu-system-ppc</emulator> <disk type='file' device='cdrom'> <source file='/home/user/boot.iso'/> <target dev='hdc'/> <readonly/> </disk> <disk type='file' device='disk'> <source file='/home/user/fedora.img'/> <target dev='hda'/> </disk> <interface type='network'> <source network='default'/> </interface> </devices> </domain> Does anyone know the reason? Thanks, Youngbin

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[libvirt-users] SSH from host to domain using hostname
by c.monty＠web.de 20 Jul '17

20 Jul '17

Hello! I want to SSH from host to specific guest using hostname, e.g. ssh <user>@<guest> or ssh test@vm02-fai ssh to guest using IP works w/o issues. I found Wiki article for "NSS module" (http://wiki.libvirt.org/page/NSS_module) but there are no results for the following commands: ld4004:/home # virsh net-dhcp-leases default Expiry Time MAC address Protocol IP address Hostname Client ID or DUID ------------------------------------------------------------------------------------------------------------------- ld4004:/home # virsh domifaddr --source lease vm02-fai Name MAC address Protocol Address ------------------------------------------------------------------------------- ld4004:/home # virsh list Id Name State ---------------------------------------------------- 1 vm02-fai running dnsmasq is running: ld4004:/home # netstat -nulpd | grep dnsmasq udp 0 0 192.168.33.1:53 0.0.0.0:* 10318/dnsmasq udp 0 0 192.168.100.1:53 0.0.0.0:* 20145/dnsmasq udp 0 0 0.0.0.0:67 0.0.0.0:* 20145/dnsmasq How can I fix this issue? THX

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[libvirt-users] libvirt administration tools
by Dominik Psenner 20 Jul '17

20 Jul '17

Hi! To give something back to the community I just now made our daily live backup scripts open source. It is hosted on github and licensed under the Apache-2.0. https://github.com/dpsenner/libvirt-administration-tools Feel free to use it in your production environment or fork and adapt it to fit your needs or even improve it and open pull requests! Cheers -- Dominik Psenner

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[libvirt-users] What may be cause vm "in shutdown" state
by ahongloumeng＠163.com 20 Jul '17

20 Jul '17

Hello， We meet a question about vm state. System environment: linux version: centos 6.8 libvirt version: 3.4.0 qemu version: 2.4.1 When shutdown one of vms, the state of the vm stuck in in shutdown state. And the qemu process is gone. Look up the vm log /var/log/libvirt/qemu/vm.log: "qemu: terminating on signal 15 from pid 54601 2017-07-19 04:41:09.960+0000: shutting down, reason=crashed" What may be cause vm "in shutdown" state Thanks! ahongloumeng(a)163.com

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[libvirt-users] Way to detect virtual machine cpu features
by Lei Zhang 19 Jul '17

19 Jul '17

Hello everyone I want to know how can I use libvirt to detect what cpu features a virtual machine will see. I guess I could do it in following way: 1. if cpu mode is 'custom', use 'virsh cpu-baseline --features' on the cpu model to get model features. 2. if cpu mode is 'host-passthrough' or 'host-model', do a 'virsh capabilities' to list cpu features of physical host, they are identical to features of virtual machine. Is this right way to do things? Look forward to your valuable comments. Best regards, Lei

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