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Can't connect to libvirt
by list-libvirt-users＠aliases.systohc.net 13 Dec '23

13 Dec '23

Hi folks! I'm trying to connect to a self-compiled libvirt 9.10.0 from python, but get the following error: Python 3.12.0 (main, Oct 3 2023, 19:47:47) [GCC 11.4.0] on linux Type "help", "copyright", "credits" or "license" for more information. >>> import libvirt as lv >>> conn = lv.openReadOnly(None) libvirt: DBus Utils error : error from service: GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: Action org.libvirt.unix.monitor is not registered Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/home/user/sw/python3/lib/python3.12/site-packages/libvirt.py", line 349, in openReadOnly raise libvirtError('virConnectOpenReadOnly() failed') libvirt.libvirtError: error from service: GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: Action org.libvirt.unix.monitor is not registered What is the issue here? Also, I've grepped the error in any source but found nothing! Greetings, Fabiano

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Re: Shared memory usage
by Martin Kletzander 11 Dec '23

11 Dec '23

On Fri, Dec 08, 2023 at 09:45:23AM +0000, Sánta, Márton (ext) via Users wrote: >Dear Users, > >I tried out shared memory using libvirt. When I configure it in the XML >(ivshmem-plain), I have to provide a name for it and after starting the >VM I can see the appropriate file on the host in the /dev/shm/ >directory. My problem is that I could not find any official >documentation about the usage of that shared memory. On the guest side, >I have found the PCI device related to it, but I do not know how to use >it. Is there any available command line tool to read from or write to >this memory or is it only possible with a user application? Could you >provide my what is the most common solution for this? > Hi, ivshmem is something you probably want to use only if you have a specific need. Maybe looking at other solutions would be more suitable. In any case you can check out the documentation from QEMU here: https://www.qemu.org/docs/master/specs/ivshmem-spec.html >Thank you in advance for your reply and help! > >Best regards, > >Márton Sánta > > >This transmission is intended solely for the addressee and contains confidential information. >If you are not the intended recipient, please immediately inform the sender and delete the message and any attachments from your system. >Furthermore, please do not copy the message or disclose the contents to anyone unless agreed otherwise. To the extent permitted by law we shall in no way be liable for any damages, whatever their nature, arising out of transmission failures, viruses, external influence, delays and the like. >_______________________________________________ >Users mailing list -- users(a)lists.libvirt.org >To unsubscribe send an email to users-leave(a)lists.libvirt.org

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search docs on www.libvirt.org
by Wolfgang Rohdewald 09 Dec '23

09 Dec '23

Hi, your website allows to search Docs. This automatically uses Google. IMHO it is very unfriendly not to warn people that an external data harvester is involved in your local search. Please consider adding a warning. BTW your website massively violates EU data privacy rights. You have no Impressum and no info about your privacy policy. Your website does not even have a contact address. -- mit freundlichen Grüssen Wolfgang Rohdewald

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Shared memory usage
by Sánta, Márton (ext) 08 Dec '23

08 Dec '23

Dear Users, I tried out shared memory using libvirt. When I configure it in the XML (ivshmem-plain), I have to provide a name for it and after starting the VM I can see the appropriate file on the host in the /dev/shm/ directory. My problem is that I could not find any official documentation about the usage of that shared memory. On the guest side, I have found the PCI device related to it, but I do not know how to use it. Is there any available command line tool to read from or write to this memory or is it only possible with a user application? Could you provide my what is the most common solution for this? Thank you in advance for your reply and help! Best regards, Márton Sánta This transmission is intended solely for the addressee and contains confidential information. If you are not the intended recipient, please immediately inform the sender and delete the message and any attachments from your system. Furthermore, please do not copy the message or disclose the contents to anyone unless agreed otherwise. To the extent permitted by law we shall in no way be liable for any damages, whatever their nature, arising out of transmission failures, viruses, external influence, delays and the like.

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a VM with secure boot does not survive a reset
by lejeczek 03 Dec '23

03 Dec '23

Hi guys. A VM created with: -> $ virt-install --boot uefi --name=client-efi-secureboot --os-variant centos-stream9 --memory $((4*1024)) --graphics=vnc,listen=0.0.0.0 --accelerate --cpuset 2 --cpu host-model --pxe --disk=/00-VMsy/client-efi-secureboot.qcow2 --network network=10_3_1,,model=virtio when *virsh reset* while running will power off, instead of *restart*. Whereas: -> $ virt-install --boot uefi,firmware.feature0.name=secure-boot,firmware.feature0.enabled=no --name=client-efi-no-secureboot --os-variant centos-stream9 --memory $((4*1024)) --graphics=vnc,listen=0.0.0.0 --accelerate --cpuset 2 --cpu host-model --pxe --disk=/00-VMsy/client-efi-no-secureboot.qcow2 --network network=10_3_1,,model=virtio does behave as expected when *reset*. libvirt-libs-9.5.0-6.el9.x86_64 BTW. Where should bug reports go to theses days - I'm trying Redhat's Jira but cannot file a BZ in _RHEL_ category. I get no errors nor warnings but Jira won't let me file anything there, but I can in Centos category. thanks, L.

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Re: Libvirt and Ceph: libvirtd tries to open random RBD images
by Daniel P. Berrangé 02 Dec '23

02 Dec '23

On Mon, Nov 20, 2023 at 01:21:24PM +0000, Jayanth Reddy wrote: > Hello Daniel, > > Thank you for the response. Please also let me know why libvirtd says "No such file or directory" even though the block images exist and are healthy. I don't know the cause - all we're seeing is that the API call if ((ret = rbd_open_read_only(ptr->ioctx, vol->name, &image, NULL)) < 0) { is failing. Maybe RBD has permission denying access on this host ? Or is RBD preventing this host access the volume, becuase another VM has it in use With regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|

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pxe efi boot - bdsdxe boot0002 access denied
by lejeczek 02 Dec '23

02 Dec '23

Hi guys I have VMs which fail to boot with error as per the subject. I suspect this is due to: <os firmware='efi'> <type arch='x86_64' machine='pc-q35-rhel9.2.0'>hvm</type> <firmware> <feature enabled='yes' name='enrolled-keys'/> <--- HERE <feature enabled='yes' name='secure-boot'/> <---- HERE ? </firmware> <loader readonly='yes' secure='yes' type='pflash'>/usr/share/edk2/ovmf/OVMF_CODE.secboot.fd</loader> <nvram template='/usr/share/edk2/ovmf/OVMF_VARS.secboot.fd'>/var/lib/libvirt/qemu/nvram/centos-efi_VARS.fd</nvram> <boot dev='network'/> <boot dev='hd'/> </os> Would you have any thoughts on how to fix, to work around it? many thanks, L.

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Internal Error: libxenlight failed to create new domain "FreeBSD-13.2"
by marietto2008＠gmail.com 30 Nov '23

30 Nov '23

Hello to everyone. I'm trying to use xen as a hypervisor instead of kvm to boot FreeBSD on my ARM Chromebook where I have installed Devuan 5. A developer said that it can work. In fact he said : "That might work. libvirt + virt-manager with the xen accelerator might work on the ARM Chromebook. That's because as far as I know Xen integration in libvirt is done via linking to libxl directly and libxl is supported and working on ARM" Unfortunately something is not working properly. What I did has been to reboot the machine in xen,enable libvirtd & and virtlogd & and virt-manager &,but this is what happened : root@devuan-bunsen:/Dati/virt-manager-4.1.0# ./virt-manager & [3] 2507 root@devuan-bunsen:/Dati/virt-manager-4.1.0# info : libvirt version: 9.7.0 info : hostname: devuan-bunsen error : virConnectGetAllDomainStats:12595 : this function is not supported by the connection driver: virConnectGetAllDomainStats error : virDomainListAllSnapshots:519 : this function is not supported by the connection driver: virDomainListAllSnapshots [3]+ Completed ./virt-manager root@devuan-bunsen:/mnt/zroot2/zroot2# error : libxlDomainStartPerform:1256 : internal error: libxenlight failed to create new domain 'FreeBSD-13.2 Traceback (most recent call last): File "/Dati/virt-manager-4.1.0/./virtManager/asyncjob.py", line 72, in cb_wrapper callback(asyncjob, *args, **kwargs) File "/Dati/virt-manager-4.1.0/./virtManager/createvm.py", line 2008, in _do_async_install installer.start_install(guest, meter=meter) File "/Dati/virt-manager-4.1.0/./virtinst/install/installer.py", line 695, in start_install domain = self._create_guest( ^^^^^^^^^^^^^^^^^^^ File "/Dati/virt-manager-4.1.0/./virtinst/install/installer.py", line 637, in _create_guest domain = self.conn.createXML(initial_xml or final_xml, 0) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/lib/python3/dist-packages/libvirt.py", line 4481, in createXML raise libvirtError('virDomainCreateXML() failed') libvirt.libvirtError: internal error: libxenlight failed to create new domain 'FreeBSD-13.2' you may also be interested to give a look at this picture : https://ibb.co/Lh0xkfy ...between the running processes I see this : # ps ax | grep qemu 1507 ? Sl 0:00 /usr/libexec/xen-qemu-system-i386 -xen-domid 0 -xen-attach -name dom0 -no graphic -M xenpv -daemonize -monitor none -serial none -parallel none -pidfile /run/qemu-dom0.pid The interesting point is that it is using xen-qemu-system-i386. Is it supposed to work on an ARM architecture ? What's the problem that I may have now ?

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Libvirt/KVM/VLANs/teamed interfaces
by Ken D'Ambrosio 30 Nov '23

30 Nov '23

Hey, all. So, we've got some OpenStack controllers that I'm virtualizing, and it's going really well... until the most recent host I was dooing, the fifth of eight. Everything looked like it largely should, except that there was zero traffic on the VLANs on the VM. Sniffing physical ports showed it hitting the machine, but nothing made it into VLAN/namespace land on the VMs. After banging my head against the wall a lot, I realized that, for some reason, the interface team (which is hot/cold) was using the secondary interface, not the primary. I turned that interface down, the primary came up, and everything started working great. (It only became apparent that something like that might be the case when I compared the broken machine's output from "brctl listmacs br0", vs. that of a working machine.) Any idea what's _really_ not working, deep down on the stack? Is there a way around it? Thanks! -Ken

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Permission Denied error when I try to open the image file stored on the ZFS disk accessed through sshfs from another machine...
by marietto2008＠gmail.com 29 Nov '23

29 Nov '23

Hello to everyone. I would like to boot the FreeBSD 13.2 image file using Libvirt + virt-manager. I have stored the image on the external hard drive,"formatted" with ZFS while I'm using Devuan 5 installed on my ARM (32 bit) Chromebook,where I have access to the ZFS disk using sshfs using this command : sshfs -o Compression=no -o allow_root -o transform_symlinks -o password_stdin root@192.168.1.2:/mnt/zroot2/zroot2 /mnt/zroot2/zroot2 <<< 'pass' This is the error I get when I try to boot the image file using virt-manager : error : qemuProcessReportLogError:1990 : internal error: process exited while connecting to monitor: 2023-11-28T20:53:46.882586Z qemu-system-arm: -blockdev {"driver":"file","filename":"/mnt/zroot2/zroot2/OS/Chromebook/FreeBSD-guestOS/freebsd-kvm/FreeBSD-13.2-RELEASE-armv7.img","node-name":"libvirt-1-storage","auto-read-only":true,"discard":"unmap"}: Could not open '/mnt/zroot2/zroot2/OS/Chromebook/FreeBSD-guestOS/freebsd-kvm/FreeBSD-13.2-RELEASE-armv7.img': Permission denied According with this post : https://forum.manjaro.org/t/virt-manager-doesnt-work-permission-denied/1081… I tried to do the following : root@devuan-bunsen:/mnt/zroot2/zroot2/OS/Chromebook/FreeBSD-guestOS/freebsd-kvm# getfacl /mnt/zroot2/zroot2/OS/Chromebook/FreeBSD-guestOS/freebsd-kvm/ getfacl: Removing leading '/' from absolute path names # file: mnt/zroot2/zroot2/OS/Chromebook/FreeBSD-guestOS/freebsd-kvm/ # owner: root # group: root user::rwx group::rwx other::rwx root@devuan-bunsen:/mnt/zroot2/zroot2/OS/Chromebook/FreeBSD-guestOS/freebsd-kvm# setfacl -m user:libvirt-qemu:--x /mnt/zroot2/zroot2/OS/Chromebook/FreeBSD-guestOS/freebsd-kvm/ setfacl: /mnt/zroot2/zroot2/OS/Chromebook/FreeBSD-guestOS/freebsd-kvm/: Operation not supported Can someone help me to understand where the error is and how to fix it ? thanks.

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