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How to enable libvirtd auth just like oVirt ?
by tommy 18 Jan '21

18 Jan '21

Hi everyone: In my libvirtd test env, there's no auth when using virsh: root@ubts2:~# virsh Welcome to virsh, the virtualization interactive terminal. Type: 'help' for help with commands 'quit' to quit virsh # virsh # virsh # list Id Name State -------------------------- 26 3.ohost1 running 27 3.ohost2 running 28 3.ohost3 running virsh # virsh # virsh # virsh # But, in oVirt env, there's auth when using virsh: [root@ohost1 ~]# virsh Welcome to virsh, the virtualization interactive terminal. Type: 'help' for help with commands 'quit' to quit virsh # virsh # virsh # virsh # virsh # list Please enter your authentication name: How can I enable auth in my libvirtd env just like oVirt ? Thanks.

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I would like to contribute to libvirt
by PRAJWAL BENEDICT A 13 Jan '21

13 Jan '21

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Get Host Capabilities failed: Internal JSON-RPC error: {'reason': 'internal error: Duplicate key'}
by tommy 13 Jan '21

13 Jan '21

Hi,everyone: I got this error in my ovirt env: VDSM ooengh1.tltd.com command Get Host Capabilities failed: Internal JSON-RPC error: {'reason': 'internal error: Duplicate key'} Systemctl message is: Dec 23 20:48:48 ooengh1.tltd.com vdsm[2431]: ERROR Internal server error Traceback (most recent call last): File "/usr/lib/python2.7/site-packages/yajsonrpc/__init__.py", line 345, in _handle_request res = method(**params) File "/usr/lib/python2.7/site-packages/vdsm/rpc/Bridge.py", line 198, in _dynamicMethod result = fn(*methodArgs) File "<string>", line 2, in getCapabilities File "/usr/lib/python2.7/site-packages/vdsm/common/api.py", line 50, in method ret = func(*args, **kwargs) File "/usr/lib/python2.7/site-packages/vdsm/API.py", line 1371, in getCapabilities c = caps.get() File "/usr/lib/python2.7/site-packages/vdsm/host/caps.py", line 93, in get machinetype.compatible_cpu_models()) File "/usr/lib/python2.7/site-packages/vdsm/common/cache.py", line 43, in __call__ value = self.func(*args) File "/usr/lib/python2.7/site-packages/vdsm/machinetype.py", line 142, in compatible_cpu_models all_models = domain_cpu_models(c, arch, cpu_mode) File "/usr/lib/python2.7/site-packages/vdsm/machinetype.py", line 97, in domain_cpu_models domcaps = conn.getDomainCapabilities(None, arch, None, virt_type, 0) File "/usr/lib/python2.7/site-packages/vdsm/common/libvirtconnection.py", line 131, in wrapper ret = f(*args, **kwargs) File "/usr/lib/python2.7/site-packages/vdsm/common/function.py", line 94, in wrapper return func(inst, *args, **kwargs) File "/usr/lib64/python2.7/site-packages/libvirt.py", line 3844, in getDomainCapabilities if ret is None: raise libvirtError ('virConnectGetDomainCapabilities() failed', conn=self) libvirtError: internal error: Duplicate key AnyOne can help me ? Thanks!

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[resent] virt-manager connection fails with 'qemu unexpectedly closed the monitor'
by John Paul Adrian Glaubitz 12 Jan '21

12 Jan '21

Hi! I recently ran into a problem when connecting to libvirtd 6.9.0 on Debian unstable and trying to import an existing image with Windows 7. Upon finishing the wizard and starting the instance, the import process fails with the following error message: Unable to complete install: 'internal error: qemu unexpectedly closed the monitor' Traceback (most recent call last): File "/usr/share/virt-manager/virtManager/asyncjob.py", line 65, in cb_wrapper callback(asyncjob, *args, **kwargs) File "/usr/share/virt-manager/virtManager/createvm.py", line 2081, in _do_async_install installer.start_install(guest, meter=meter) File "/usr/share/virt-manager/virtinst/install/installer.py", line 731, in start_install domain = self._create_guest( File "/usr/share/virt-manager/virtinst/install/installer.py", line 679, in _create_guest domain = self.conn.createXML(install_xml or final_xml, 0) File "/usr/lib64/python3.8/site-packages/libvirt.py", line 4366, in createXML raise libvirtError('virDomainCreateXML() failed') libvirt.libvirtError: internal error: qemu unexpectedly closed the monitor Since this error message is rather generic, I don't know where to start debugging. Does anyone know how to increase verbosity here to get an error message that might be more helpful? Thanks, Adrian -- .''`. John Paul Adrian Glaubitz : :' : Debian Developer - glaubitz(a)debian.org `. `' Freie Universitaet Berlin - glaubitz(a)physik.fu-berlin.de `- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913

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Problem with xen hvm DomU
by Christoph 08 Jan '21

08 Jan '21

Hi can someone say me whats wrong in this config: <domain type='xen'> <name>fenrir.chao5.int</name> <uuid>7aedcd03-54e8-4055-8d1b-37dd34194859</uuid> <memory unit='KiB'>2097152</memory> <currentMemory unit='KiB'>2097152</currentMemory> <vcpu placement='static'>2</vcpu> <os> <type arch='x86_64' machine='xenfv'>hvm</type> <loader type='rom'>/usr/lib/xen/boot/hvmloader</loader> <kernel>/usr/lib64/xen/boot/hvmloader</kernel> <boot dev='hd'/> </os> <features> <acpi/> <apic/> <pae/> </features> <clock offset='variable' adjustment='0' basis='localtime'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <devices> <disk type='file' device='disk'> <driver name='qemu' type='raw'/> <source file='/dev/vg_astarte/lv_fenrir_root'/> <target dev='hda' bus='ide'/> <address type='drive' controller='0' bus='0' target='0' unit='0'/> </disk> <disk type='file' device='disk'> <driver name='qemu' type='raw'/> <source file='/dev/vg_astarte/lv_fenrir_swap'/> <target dev='hdb' bus='ide'/> <address type='drive' controller='0' bus='0' target='0' unit='1'/> </disk> <controller type='xenbus' index='0'/> <controller type='ide' index='0'/> <interface type='bridge'> <mac address='00:16:3e:05:30:04'/> <source bridge='xenbr5'/> <script path='vif-bridge'/> <model type='netfront'/> </interface> <interface type='bridge'> <mac address='00:16:3e:04:30:04'/> <source bridge='xenbr4'/> <script path='vif-bridge'/> <model type='netfront'/> </interface> <interface type='bridge'> <mac address='00:16:3e:15:30:04'/> <source bridge='xenbr15'/> <script path='vif-bridge'/> <model type='netfront'/> </interface> <interface type='bridge'> <mac address='00:16:3e:14:30:04'/> <source bridge='xenbr14'/> <script path='vif-bridge'/> <model type='netfront'/> </interface> <input type='mouse' bus='ps2'/> <input type='keyboard' bus='ps2'/> <graphics type='vnc' port='6000' autoport='no' listen='0.0.0.0'> <listen type='address' address='0.0.0.0'/> </graphics> <video> <model type='cirrus' vram='8192' heads='1' primary='yes'/> </video> <memballoon model='xen'/> </devices> </domain> If I try to start it with virsh create... then I see only: error: Failed to create domain from /etc/libvirt/libxl/fenrir.chao5.int.xml error: internal error: libxenlight failed to create new domain 'fenrir.chao5.int' ------ Greetz

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Migration via qemu+ssh using a given private ssh key possible ?
by Oliver Dzombic 06 Jan '21

06 Jan '21

Hi, happy new year! Is there a way to tell libvirt to migrate an instance via qemu+ssh using a specific ssh key ? It seems libvirt will always try to use the .ssh/id_rsa private key. But i would like to somehow tell libvirt to use a specific private ssh key. ( At best via command line argument ). Is that possible somehow ? Or something else similar ? Thank you! -- Mit freundlichen Gruessen / Best regards Oliver Dzombic Layer7 Networks mailto:info@layer7.net Anschrift: Layer7 Networks GmbH Zum Sonnenberg 1-3 63571 Gelnhausen HRB 96293 beim Amtsgericht Hanau Geschäftsführung: Oliver Dzombic UST ID: DE259845632

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about the script /etc/qemu-ifup with nmcli command
by Yalan Zhang 05 Jan '21

05 Jan '21

Hi, I have tried the qemu-ifup script as below with nmcli command as brctl is deprecated on rhel8, but the guest network can not work. I think the script needs update. Could you please help to have a look? Thank you in advance. 1. prepare a linux bridge on the host named br0; 2. prepare the qemu-ifup script as below: # cat /etc/qemu-ifup #!/bin/bash # A br0 bridge should be already set up. # Compare with: # http://en.wikibooks.org/wiki/QEMU/Networking#qemu-ifup # # For the bridge setup, see: # http://wiki.libvirt.org/page/Networking#Fedora.2FRHEL_Bridging # http://gist.github.com/393525 ip link set "$1" up nmcli c add type bridge-slave ifname $1 con-name $1 master br0 autoconnect yes 3. start vm with below interface setting: # virsh dumpxml rh | grep /interface -B5 <interface type='ethernet'> <mac address='52:54:00:79:ba:dd'/> <script path='/etc/qemu-ifup'/> <model type='virtio'/> <address type='pci' domain='0x0000' bus='0x04' slot='0x00' function='0x0'/> </interface> # virsh start rh Domain rh started 4.check on guest, the interface can not get dhcp ip address; 5. check on host, # nmcli con NAME UUID TYPE DEVICE br0 f68f73c7-10ee-40c1-bb09-3366d11ac896 bridge br0 ... vnet0 90a48d77-dccc-4b59-98f5-09f8cbd62458 ethernet -- # nmcli dev DEVICE TYPE STATE CONNECTION br0 bridge connected br0 ... vnet0 tun unmanaged -- 6. hotplug a bridge type interface and compare the tap devices: # virsh attach-interface rh bridge br0 --model virtio Interface attached successfully # nmcli con NAME UUID TYPE DEVICE br0 f68f73c7-10ee-40c1-bb09-3366d11ac896 bridge br0 vnet1 07c2a1f8-396f-4d5f-b61f-ef2ddb42ed93 tun vnet1 --->the hot-plugged one ... vnet0 90a48d77-dccc-4b59-98f5-09f8cbd62458 ethernet -- ----> the ethernet one # nmcli dev DEVICE TYPE STATE CONNECTION vnet1 tun connected (externally) vnet1 --->the hot-plugged one vnet0 tun unmanaged -- ----> the ethernet one ... 7. from the outputs above, the back-end tun device for ethernet type interface is unmanaged. I don't know how to update the script to fix it. Could you please help? ------- Best Regards, Yalan Zhang IRC: yalzhang

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virt-manager connection fails with 'qemu unexpectedly closed the monitor'
by John Paul Adrian Glaubitz 04 Jan '21

04 Jan '21

Hi! I recently ran into a problem when connecting to libvirtd 6.9.0 on Debian unstable and trying to import an existing image with Windows 7. Upon finishing the wizard and starting the instance, the import process fails with the following error message: Unable to complete install: 'internal error: qemu unexpectedly closed the monitor' Traceback (most recent call last): File "/usr/share/virt-manager/virtManager/asyncjob.py", line 65, in cb_wrapper callback(asyncjob, *args, **kwargs) File "/usr/share/virt-manager/virtManager/createvm.py", line 2081, in _do_async_install installer.start_install(guest, meter=meter) File "/usr/share/virt-manager/virtinst/install/installer.py", line 731, in start_install domain = self._create_guest( File "/usr/share/virt-manager/virtinst/install/installer.py", line 679, in _create_guest domain = self.conn.createXML(install_xml or final_xml, 0) File "/usr/lib64/python3.8/site-packages/libvirt.py", line 4366, in createXML raise libvirtError('virDomainCreateXML() failed') libvirt.libvirtError: internal error: qemu unexpectedly closed the monitor Since this error message is rather generic, I don't know where to start debugging. Does anyone know how to increase verbosity here to get an error message that might be more helpful? Thanks, Adrian -- .''`. John Paul Adrian Glaubitz : :' : Debian Developer - glaubitz(a)debian.org `. `' Freie Universitaet Berlin - glaubitz(a)physik.fu-berlin.de `- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913

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Unexplicable permission error when trying to read a qemu firmware file
by Emmanuel Kasper 04 Jan '21

04 Jan '21

Hi I want to create a CoreOS VM following the steps mentioned at https://docs.fedoraproject.org/en-US/fedora-coreos/getting-started, using a Debian 11 (bullseye) system. I am thus creating a VM with the following virt-install command: virt-install --connect="qemu:///system" --name=coreos \ --vcpus=2 --memory=2048 \ --os-variant=fedora29 --import --graphics=none \ --disk="size=10,backing_store=$PWD/fedora-coreos-33.20201201.3.0-qemu.x86_64.qcow2" \ --qemu-commandline="-fw_cfg name=opt/com.coreos/config,file=/tmp/example.ign" which spits some warnings and this mysterious error 2020-12-29T16:52:03.858938Z qemu-system-x86_64: warning: host doesn't support requested feature: MSR(48FH).vmx-exit-load-perf-global-ctrl [bit 12] 2020-12-29T16:52:03.858941Z qemu-system-x86_64: warning: host doesn't support requested feature: MSR(490H).vmx-entry-load-perf-global-ctrl [bit 13] 2020-12-29T16:52:03.864778Z qemu-system-x86_64: -fw_cfg name=opt/com.coreos/config,file=/tmp/example.ign: can't load /tmp/example.ign: Failed to open file “/tmp/example.ign”: Permission denied the file /tmp/example.ign is perfectly world readable, -rw-rw-rw- 1 manu manu 1130 Dec 29 17:23 /tmp/example.ign so I am puzzled at what could cause this permission error. on a RHEL8 system, I had the same error, and was able to fix by setting a security context on the firmware file: sudo semanage fcontext --add --type virt_content_t /tmp/example.ign restorecon /tmp/example.ign now this Debian system does not selinux installed at all. ls -dZ / ? / I could also read the qemu firmware file when using the qemu:///session connection any pointers where to look for ? Emmanuel

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Isolated bridge does not bridge
by Paul van der Vlis 04 Jan '21

04 Jan '21

Hello, I want to do some testing and I have removed two VM's from the bridge what connects them to internet, and added them to another isolated bridge what's not connected to internet. Problem is that I cannot reach the other host in the isolated network. Something like this: virsh shutdown kvm66 virsh shutdown kvm68 brctl delif br0 vnet10 vnet6 # the interfaces of kvm66 and kvm68 brctl addbr br1 brctl addif br1 vnet10 vnet6 Then I've replaced br0 to br1 in the XML of both VM's with "virsh edit". Then I did start the VM's using the serial console (no network): virsh start --console kvm66 virsh start --console kvm68 I cannot ping from one machine to the other. Why?? With regards, Paul -- Paul van der Vlis Linux systeembeheer Groningen https://www.vandervlis.nl/

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