May 2020 - Users - libvirt List Archives

[libvirt-users] [virtual interface] detach interface during boot succeed with no changes
by Yalan Zhang 08 Sep '22

08 Sep '22

Hi guys, when I detach an interface from vm during boot (vm boot not finished), it always fail. I'm not sure if there is an existing bug. I have confirmed with someone that for disk, there is similar behavior, if this is also acceptable? # virsh destroy rhel7.2; virsh start rhel7.2 ;sleep 2; virsh detach-interface rhel7.2 network 52:54:00:98:c4:a0; sleep 2; virsh dumpxml rhel7.2 |grep /interface -B9 Domain rhel7.2 destroyed Domain rhel7.2 started Interface detached successfully <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/> </controller> <interface type='network'> <mac address='52:54:00:98:c4:a0'/> <source network='default' bridge='virbr0'/> <target dev='vnet0'/> <model type='rtl8139'/> <alias name='net0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> When I detach after the vm boot, expand the sleep time to 10, it will succeed. # virsh destroy rhel7.2; virsh start rhel7.2 ;sleep 10; virsh detach-interface rhel7.2 network 52:54:00:98:c4:a0; sleep 2; virsh dumpxml rhel7.2 |grep /interface -B9 Domain rhel7.2 destroyed Domain rhel7.2 started Interface detached successfully ------- Best Regards, Yalan Zhang IRC: yalzhang Internal phone: 8389413

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Set hostname of guest during installation time
by john doe 05 Nov '20

05 Nov '20

Hi, I would like to set the hostname when installing a guest, with the below command the hostname is not set to 'try06' in the guest: virt-install --name=try06 --graphic none --pxe --network bridge=virbr0 How can I set the hostname of the guest during installation time? I realy appriciate the support I'm getting in here, I'm fairly new to libvirt. -- John Doe

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[libvirt-users] Live migrate + change interface name
by Marc Roos 07 Oct '20

07 Oct '20

Is it possible to do a live migrate of a guest, having on the from host a source_device=eth2 and to host a source_dev=eth1?

2 4

[libvirt-users] Add Virtlyst to the list of libvirt users
by Daniel Nicoletti 23 Sep '20

23 Sep '20

Hi, I've just released v1.0.0 of Virtlyst[1] a web tool to manage VMs using Qt/C++/Cutelyst https://dantti.wordpress.com/2018/04/19/announcing-virtlyst-a-web-interface… Thanks. 1 - https://github.com/cutelyst/Virtlyst -- Daniel Nicoletti KDE Developer - http://dantti.wordpress.com

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guest-fsfreeze-freeze freezes all mounted block devices
by Marc Roos 09 Aug '20

09 Aug '20

I wondered if anyone here can confirm that virsh qemu-agent-command domain '{"execute":"guest-fsfreeze-freeze"}' Freezes all mounted block devices filesystems. So if I use 4 block devices they are all frozen for snapshotting. Or just the root fs?

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[libvirt-users] Question about disabling UFO on guest
by Bao Nguyen 05 Aug '20

05 Aug '20

Hello everyone, I would like to ask a question regarding to disable UFO of virtio vNIC in my guest. I have read the document at https://libvirt.org/formatdomain.html *host* The csum, gso, tso4, tso6, ecn and ufo attributes with possible values on and off can be used to turn off host offloading options. By default, the supported offloads are enabled by QEMU. *Since 1.2.9 (QEMU only)* The mrg_rxbuf attribute can be used to control mergeable rx buffers on the host side. Possible values are on (default) and off. *Since 1.2.13 (QEMU only)* *guest* The csum, tso4, tso6, ecn and ufo attributes with possible values on and off can be used to turn off guest offloading options. By default, the supported offloads are enabl ed by QEMU. *Since 1.2.9 (QEMU only)* Then I disabled UFO on my vNIC on guest as the following configuration <devices> <interface type='network'> <source network='default'/> <target dev='vnet1'/> <model type='virtio'/> <driver name='vhost' txmode='iothread' ioeventfd='on' event_idx='off' queues='5' rx_queue_size='256' tx_queue_size='256'> *<host gso='off' ufo='off' />* *<guest ufo='off'/>* </driver> </interface> </devices> Then I reboot my node to get the change effect and it works. However, can I disable the UFO without touching the host OS? or it always has to disable on both host and guest like that? Thanks, Brs, Natsu

2 1

Could you please help with questions about the net failover feature
by Yalan Zhang 09 Jul '20

09 Jul '20

Hi laine, I have leave some questions on IRC, but my VPN broken time after time. Please ignore the questions on IRC. In my understanding, the standby and primary hostdev interface may be in different subnet. I'm not sure whether it is correct. Could you please help to explain? Thank you in advance. For example, primary hostdev is connected to vf-pool with <pf='eth0'/>, while the standby is connected to NAT network with " forward dev='eth0'". The standby interface will get ip as 192.168.122.x, but after NAT, it will be in the same subnet of the vf. So after the VF is unplugged, the packet will still broadcast in the same subnet, and the vm will get the packet as the standby share the same mac. Right? Thank you! ------- Best Regards, Yalan Zhang IRC: yalzhang

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plug pre-created tap devices to libvirt guests
by Miguel Duarte de Mora Barroso 30 Jun '20

30 Jun '20

Hi all, I'm aware that it is possible to plug pre-created macvtap devices to libvirt guests - tracked in RFE [0]. My interpretation of the wording in [1] and [2] is that it is also possible to plug pre-created tap devices into libvirt guests - that would be a requirement to allow kubevirt to run with less capabilities in the pods that encapsulate the VMs. I took a look at the libvirt code ([3] & [4]), and, from my limited understanding, I got the impression that plugging existing interfaces via `managed='no' ` is only possible for macvtap interfaces. Would you be able to shed some light into this ? Is it possible on libvirt-5.6.0 to plug pre-created tap devices to libvirt guests ? [0] - https://bugzilla.redhat.com/show_bug.cgi?id=1723367 [1] - https://bugzilla.redhat.com/show_bug.cgi?id=1723367#c2 [2] - https://bugzilla.redhat.com/show_bug.cgi?id=1723367#c3 [3] - https://github.com/libvirt/libvirt/blob/master/src/qemu/qemu_interface.c#L4… [4] - https://github.com/libvirt/libvirt/blob/master/src/qemu/qemu_interface.c#L4…

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qemu hook: event for source host too
by Guy Godfroy 23 Jun '20

23 Jun '20

Hello, this is my first time posting on this mailing list. I wanted to suggest a addition to the qemu hook. I will explain it through my own use case. I use a shared LVM storage as a volume pool between my nodes. I use lvmlockd in sanlock mode to protect both LVM metadata corruption and concurrent volume mounting. When I run a VM on a node, I activate the desired LV with exclusive lock (lvchange -aey). When I stop the VM, I deactivate the LV, effectively releasing the exclusive lock (lvchange -an). When I migrate a VM (both live and offline), the LV has to be activated on both source and target nodes, so I have to use a shared lock (lvchange -asy). That's why I need a hook event on the source host too (as far as I know after my tests, the migration event is only triggered on the target host). Is such a feature a possibility? Thanks for your attention. Guy Godfroy

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Migrate to a bigger disk possible?
by Paul van der Vlis 11 Jun '20

11 Jun '20

Hello, I have a qcow2 disk what needs to become increased. I don't have space on the location where it is now to have it two time, so I want to live-migrate it to another host. On the other host I have to create a qcow2 disk before I can migrate. What would happen when I would create there a bigger qcow2 disk then the original one? Can I resize the filesystem after the migration? With regards, Paul van der Vlis -- Paul van der Vlis Linux systeembeheer Groningen https://www.vandervlis.nl/

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libvirt-defined network vs/and openvswitch bridge
by Po Dragonwarrior 01 Jun '20

01 Jun '20

Hi all, Can you please explain to me what is the difference (or maybe the relation?) between a libvirt defined network and an openvswitch bridge? best, Po

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About Libvirt Setmem&dommemstat Function
by 🍭 20 May '20

20 May '20

I have sent a similar email about this problem. But I did not describe carefully, so I would like to explain it in more details. I am using 'virsh setmem' to ajust vm memory online. However, I don't know what is the lowerlimit that can be set to. And I try to use 'virsh dommemstat' to get 'unused' memory so that I can calculate the lowerlimit memory with this value, but it doesn't work when it comes to windows systems as I cannot set vm memory down to 'available - unused' in windows system. I suppose it's caches memory that causes this problem, so I upgrade my libvirt & qemu in order to get 'stat_disk_caches'. Although I upgrade libvirt to v4.10.0, qemu upgrade to v4.1.0, I cannot get this value. In summary, I came across two problems. How can I know the exact lowerlimit memory that can be set to in one vm? And if I need 'stat_disk_caches' value, how can I get it properly? My libvirt version: v4.10.0, qemu version:v4.1.0, hypervisor working on centos7.6 system.

1 0

macvtap direct
by Subhendu Ghosh 19 May '20

19 May '20

Hi Couple of questions around macvtap direct usage: 1) is the document here current? https://libvirt.org/formatnetwork.html#examplesDirect I have been able to get host to guest network traffic without any special configuration or switch since Fedora 28 when I first started using it. Using <forward mode=vepa> requires switch port mirroring, but just using <forward mode=bridge> doesn't. 2) do any of the language libraries make assumptions that libvirt networks must have a <bridge name=xx> attribute? Foreman's Ruby interface to libvirt errors out with attempting to build a VM on a KVM host with a network defined with <forward mode=bridge> https://projects.theforeman.org/issues/25890 thanks Subhendu

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About Libvirt Setmem&dommemstat Function
by 🍭 19 May '20

19 May '20

I am using 'virsh setmem' to adjust the vm memory. But I don't know what is the lowerlimit memory that can be adjusted to, so I try to update the version of libvirt&qemu to get caches of the vm memory so that I can calculate the lowerlimit. And when I upgrade libvirt to 4.10.0, qemu upgrade to 4.1.0, still, I cannot get 'stat-disk-caches'.  How can I solve it ? Thx.

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Firmware auto-select limitation
by GUOQING LI 15 May '20

15 May '20

Hi everyone and Martin I would like to confirm the conversation we had in regard the possible limitation of firmware auto-select feature that’s been released since v5.20. I recall you saying that there were a lot of issues with auto select and later they shipped it into a Json file , it still didn’t solve all the problems, did it? Is it better to explicitly specify the loader and nvram path than using auto-select ? Just today, I encountered the issue of using firmware=“efi” on libvirt 5.4.0 I am running Ubuntu eoan 19.10, I am wondering how did it happen. Detailed error Error starting domain: internal error: process exited while connecting to monitor: 2020-05-15T14:19:06.033267Z qemu-system-x86_64: -drive file=/usr/share/OVMF/OVMF_CODE.fd,if=pflash,format=raw,unit=0,readonly=on: Failed to lock byte 100 Traceback (most recent call last): File "/usr/share/virt-manager/virtManager/asyncjob.py", line 75, in cb_wrapper callback(asyncjob, *args, **kwargs) File "/usr/share/virt-manager/virtManager/asyncjob.py", line 111, in tmpcb callback(*args, **kwargs) File "/usr/share/virt-manager/virtManager/object/libvirtobject.py", line 66, in newfn ret = fn(self, *args, **kwargs) File "/usr/share/virt-manager/virtManager/object/domain.py", line 1279, in startup self._backend.create() File "/usr/lib/python3/dist-packages/libvirt.py", line 1080, in create if ret == -1: raise libvirtError ('virDomainCreate() failed', dom=self) libvirt.libvirtError: internal error: process exited while connecting to monitor: 2020-05-15T14:19:06.033267Z qemu-system-x86_64: -drive file=/usr/share/OVMF/OVMF_CODE.fd,if=pflash,format=raw,unit=0,readonly=on: Failed to lock byte 100

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DNSMASQ Libvirt
by Santhosh Kumar Gunturu 15 May '20

15 May '20

Hi, Net-dump xml File. root@NFV-FRU:~# virsh net-dumpxml data-2 <network> <name>data-2</name> <uuid>ace4935f-0367-4632-be7c-61bab2da7d4a</uuid> <bridge name='data-2br1' stp='on' delay='0'/> <mac address='52:54:00:46:43:7d'/> <ip address='10.12.12.1' netmask='255.255.255.240'> <dhcp> <range start='10.12.12.4' end='10.12.12.4'/> </dhcp> </ip> </network> The DHCP response is going with Subnet Mask 255.255.255.0 10.12.12.1.bootps > 10.12.12.4.bootpc: [udp sum ok] BOOTP/DHCP, Reply, length 300, xid 0x7331d77a, Flags [none] (0x0000) Your-IP 10.12.12.4 Server-IP 10.12.12.1 Client-Ethernet-Address 52:54:00:5f:ab:94 (oui Unknown) Vendor-rfc1048 Extensions Magic Cookie 0x63825363 DHCP-Message Option 53, length 1: Offer Server-ID Option 54, length 4: 10.12.12.1 Lease-Time Option 51, length 4: 3600 RN Option 58, length 4: 1800 RB Option 59, length 4: 3150 Subnet-Mask Option 1, length 4: 255.255.255.0 BR Option 28, length 4: 10.12.12.255 Domain-Name-Server Option 6, length 4: 10.12.12.1 Can I know the reason ? Thanks & Regards Santhosh Kumar Gunturu

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What is expiry time represents in this format
by Santhosh Kumar Gunturu 15 May '20

15 May '20

I see the output. root@X10SDV-8C-TLN4F:/mnt/config# cat /var/lib/libvirt/dnsmasq/mgmt-1br1.status [ { "ip-address": "192.168.27.8", "mac-address": "52:54:00:42:21:14", "hostname": "vyatta", "expiry-time": 1589500228 } ] Can you please explain what does the expiry-time mean ? What are its units ? Please let me know. Thanks & Regards Santhosh Kumar Gunturu

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Re: Storage cleaning
by Lothar Schilling 14 May '20

14 May '20

Thank you, that's it! virsh vol-list storage VM1 /dev/storage/VM1.img VM2 /dev/storage/VM2.img VM3 /dev/storage/VM3.img [dead] VM4 /dev/storage/VM4.img [dead] A last stupid question (I don't want to make a big mistake ...): Is virsh vol-delete VM3 virsh vol-delete VM4 the right command to get rid of the offending ones? Am 14.05.2020 um 19:10 schrieb Alvin Starr: > > virsh pool-list > you will get something like: > Name State Autostart > ----------------------------------------------- > default active yes > gnome-boxes active no > windows-openstack-image active yes > > then run virsh vol-list <your volume name> > > and you should be able to see the volumes that are still defined. > > > On 5/14/20 1:01 PM, Lothar Schilling wrote: >> virsh list --all >> >> 15 VM1 running >> 16 VM2 running >> >> ps ax | grep virt >> >> 14281 ? Sl 1170:30 /usr/libexec/qemu-kvm -name VM1 [...] >> 14384 ? Sl 376:45 /usr/libexec/qemu-kvm -name VM2 [...] >> >> Am 14.05.2020 um 17:45 schrieb Alvin Starr: >> >>> List your storage pool to insure that they have been deleted from >>> the pool. >>> If they are not there anymore then check to make sure nothing is >>> running that would have the VM images open. >>> >>> On 5/14/20 11:01 AM, Lothar Schilling wrote: >>>> Hi everybody, >>>> >>>> we have a Centos 6 host with libvirtd 0.10.2. It's holding a >>>> storage pool of about 3.5 TB with 4 VMs. I decided to rearrange >>>> them, so I destroyed and undefined two of them. But now I am not >>>> able to install a new one because virsh gives me an "not enough >>>> space left". Those two undefined VMs still linger around somehow >>>> occupying a lot of that storage. How can I get rid of them? >>>> >>>> Name: storage >>>> UUID: 8b25e085-38d8-5a09-f80f-a29150f25d42 >>>> Status: laufend >>>> Persistent: yes >>>> Automatischer Start: yes >>>> Kapazität: 3,54 TiB >>>> Zuordnung: 3,39 TiB >>>> Verfügbar: 155,27 GiB >>>> >>>> Thank you very much >>>> >>>> Lothar Schilling >> >> >

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Re: Storage cleaning
by Lothar Schilling 14 May '20

14 May '20

virsh list --all 15 VM1 running 16 VM2 running ps ax | grep virt 14281 ? Sl 1170:30 /usr/libexec/qemu-kvm -name VM1 [...] 14384 ? Sl 376:45 /usr/libexec/qemu-kvm -name VM2 [...] Am 14.05.2020 um 17:45 schrieb Alvin Starr: > List your storage pool to insure that they have been deleted from the > pool. > If they are not there anymore then check to make sure nothing is > running that would have the VM images open. > > On 5/14/20 11:01 AM, Lothar Schilling wrote: >> Hi everybody, >> >> we have a Centos 6 host with libvirtd 0.10.2. It's holding a storage >> pool of about 3.5 TB with 4 VMs. I decided to rearrange them, so I >> destroyed and undefined two of them. But now I am not able to install >> a new one because virsh gives me an "not enough space left". Those >> two undefined VMs still linger around somehow occupying a lot of that >> storage. How can I get rid of them? >> >> Name: storage >> UUID: 8b25e085-38d8-5a09-f80f-a29150f25d42 >> Status: laufend >> Persistent: yes >> Automatischer Start: yes >> Kapazität: 3,54 TiB >> Zuordnung: 3,39 TiB >> Verfügbar: 155,27 GiB >> >> Thank you very much >> >> Lothar Schilling

1 0

Storage cleaning
by Lothar Schilling 14 May '20

14 May '20

Hi everybody, we have a Centos 6 host with libvirtd 0.10.2. It's holding a storage pool of about 3.5 TB with 4 VMs. I decided to rearrange them, so I destroyed and undefined two of them. But now I am not able to install a new one because virsh gives me an "not enough space left". Those two undefined VMs still linger around somehow occupying a lot of that storage. How can I get rid of them? Name: storage UUID: 8b25e085-38d8-5a09-f80f-a29150f25d42 Status: laufend Persistent: yes Automatischer Start: yes Kapazität: 3,54 TiB Zuordnung: 3,39 TiB Verfügbar: 155,27 GiB Thank you very much Lothar Schilling

1 0

Unit libvirtd.service could not be found. on VM
by Dana Elfassy 13 May '20

13 May '20

Hi all, Some background: I recently has some issues with libvirt on my laptop when I got the error 'operation failed: pool 'default' already exists with uuid dd48b6ad-9a00-46eb-a3a4-c122d8a294a5' when I connected virt-manager. I was finally able to resolve it yesterday, when I removed libvirt and all its related content in /etc/libvirt, removed the pool by its UUID, deleted virbr0 & virbro-nic, removed the default network, reinstalled and created the network & default pool again Now I got libvirtd on my laptop up & running. However, when I install vms on my laptop, they don't have libvirtd.service This is the network configuration XML: <interface type="network"> <mac address="52:54:00:d0:40:69"/> <source network="default" portid="171a745c-f96d-412a-baa7-ee1feeaed6ac" bridge="virbr0"/> <target dev="vnet1"/> <model type="virtio"/> <alias name="net0"/> <address type="pci" domain="0x0000" bus="0x00" slot="0x03" function="0x0"/> </interface> I installed the vms with virt-manager. The Network source is Virtual network 'default': NAT I'm using CentOS8.1 on both my laptop & vms. Is there anything else I need to reconfigure or any thoughts why libvirtd.service doesn't exist on my VMS? Thanks, Dana

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Re: USB-hotplugging fails with "failed to load cgroup BPF prog: Operation not permitted" on cgroups v2
by Pavel Hrdina 13 May '20

13 May '20

On Mon, Jan 20, 2020 at 09:00:15PM +0100, Pol Van Aubel wrote: > Hi, > > Quoting Pavel Hrdina (2020-01-20 14:29:36) > > On Sat, Jan 18, 2020 at 11:17:11PM +0100, Pol Van Aubel wrote: > > > Hi all, > > > > > > I've disabled cgroups v1 on my system with the kernel boot option > > > "systemd.unified_cgroup_hierarchy=1". Since doing so, USB hotplugging > > > fails to work, seemingly due to a permissions problem with BPF. Please > > > note that the technique I'm going to describe worked just fine for > > > hotplugging USB devices to running domains until this change. > > > Attaching / detaching USB devices when the domain is down still works as > > > expected. > > > > > > I get the same error when attaching a device in virt-manager, as I do > > > when running the following command: > > > > > > sudo virsh attach-device wenger /dev/stdin --persistent <<END > > > <hostdev mode='subsystem' type='usb' managed='yes'> > > > <source startupPolicy='optional'> > > > <vendor id='0x046d' /> > > > <product id='0xc215' /> > > > </source> > > > </hostdev> > > > END > > > > > > This returns > > > error: Failed to attach device from /dev/stdin > > > error: failed to load cgroup BPF prog: Operation not permitted > > > > > > > > > virt-manager returns basically the same error, but for completeness' > > > sake, here it is: > > > > > > failed to load cgroup BPF prog: Operation not permitted > > > > > > Traceback (most recent call last): > > > File "/usr/share/virt-manager/virtManager/addhardware.py", line 1327, in _add_device > > > self.vm.attach_device(dev) > > > File "/usr/share/virt-manager/virtManager/object/domain.py", line 920, in attach_device > > > self._backend.attachDevice(devxml) > > > File "/usr/lib/python3.8/site-packages/libvirt.py", line 590, in attachDevice > > > if ret == -1: raise libvirtError ('virDomainAttachDevice() failed', dom=self) > > > libvirt.libvirtError: failed to load cgroup BPF prog: Operation not permitted > > > > > > > > > Now, libvirtd is running as root, so I don't understand why any > > > operation on BPF programs is not permitted. I've dug into libvirt's code > > > a bit to see what is throwing this error and it boils down to > > > <https://github.com/libvirt/libvirt/blob/7d608469621a3fda72dff2a89308e68cc9f…> > > > and > > > <https://github.com/libvirt/libvirt/blob/02bf7cc68bfc76242f02d23e73cad36618f…> > > > but I have no clue what that syscall is doing, so that's where my > > > debugging capability basically ends. > > > > > > Maybe this is something as simple as setting the right ACL somewhere. I > > > haven't touched /etc/libvirt/qemu.conf except for setting nvram. There > > > *is* something about cgroup_device_acl there but afaict that's for > > > cgroups v1, when there was still a device cgroup controller. Any help > > > would be greatly appreciated. > > > > > > > > > Domain log files: > > > Upon execution of the above commands, nothing gets added to the domain > > > log in /var/log/qemu/wenger.log, so I've decided they're likely > > > irrelevant to the issue. Please ask for any additional info required. > > > > > > > > > System information: > > > Arch Linux, (normal) kernel 5.4.11 > > > libvirt 5.10.0 > > > qemu 4.2.0, using KVM. > > > Host system is x86_64 on an intel 5820k. > > > Guest system is probably irrelevant, but is Windows 10 on the same. > > > > > > > > > Possibly relevant kernel build options: > > > $ zgrep BPF /proc/config.gz > > > [22:55:52]: zgrep BPF /proc/config.gz > > > > > > CONFIG_CGROUP_BPF=y > > > CONFIG_BPF=y > > > CONFIG_BPF_SYSCALL=y > > > CONFIG_BPF_JIT_ALWAYS_ON=y > > > CONFIG_IPV6_SEG6_BPF=y > > > CONFIG_NETFILTER_XT_MATCH_BPF=m > > > # CONFIG_BPFILTER is not set > > > CONFIG_NET_CLS_BPF=m > > > CONFIG_NET_ACT_BPF=m > > > CONFIG_BPF_JIT=y > > > CONFIG_BPF_STREAM_PARSER=y > > > CONFIG_LWTUNNEL_BPF=y > > > CONFIG_HAVE_EBPF_JIT=y > > > CONFIG_BPF_EVENTS=y > > > # CONFIG_BPF_KPROBE_OVERRIDE is not set > > > # CONFIG_TEST_BPF is not set > > > > Hi > > > > I've installed clean archlinux to try this out and it works as expected, > > I'm able to attach USB device into a VM. > > > > My system env is mostly the same as yours except for kernel version: > > > > kernel 5.4.13 > > libvirt 5.10.0 > > qemu 4.2.0, using KVM. > > > > Please enable libvirt debug logs [1] and share the output with us. > > I've updated to 5.4.13 and created a barebones VM without storage to > reproduce the behaviour. libvirtd debug logs are attached. There appear > to be two BPF failures of the same BPF program (?). The first is on line > 23209, which appears to be part of machine startup, and which I don't > actually notice. The second one is where I manually add the USB device, > on line 30599. > > Thanks, Thanks for the logs, but it did not help to figure out where the issue is. I was hoping to see some error output from the syscall but the line that should contain it is empty: 2020-01-20 19:47:15.589+0000: 8579: debug : virBPFLoadProg:78 : Can you please check system logs and output of dmesg? I've managed to run into this article [1] that explains that even if you have all permissions and no SELinux you can still be blocked by something called kernel_lockdown and it should appear in dmesg. Pavel [1] <https://gehrcke.de/2019/09/running-an-ebpf-program-may-require-lifting-the-…>

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libvirt object IVirtualBox is null
by claudia freitas 13 May '20

13 May '20

Hi, I'm using libvirt to manage virtual machines created with VirtualBox-6.0, however when I try to start, to shut down virsh vm I get the message of object IVirtualBox is null. However, if I leave the VirtualBox graphical interface open it works normally. Can anyone help or is experiencing the same problem? Thanks, Kilida2020

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Another DKIM test message
by dberrange＠yahoo.com 13 May '20

13 May '20

Testing

1 0

Testing new email settings to fix DKIM
by dberrange＠yahoo.com 13 May '20

13 May '20

Testing

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Running libvirtd inside chroot (mock to be precise)
by Marcin Sobczyk 13 May '20

13 May '20

Hi, I was wondering whether it's possible to run libvirtd inside a chroot environment. The assumption is that only one instance of libvirtd would be running on the machine at a time, but still, inside chroot. Currently in my chroot env I have: - /dev/kvm added with mknod - /dev/vhost-net added with mknod - mounted: - /dev/net - /dev/shm - /run/dbus When I run libvirtd in non-daemon mode I get one error: 2020-05-13 10:06:27.480+0000: 28555: error : virNetDevBridgeCreate:484 : error creating bridge interface virbr0: File exists but it seems to me that libvirtd can live with that. When I try to run a VM however I get a qemu error reported: 2020-05-13 08:56:51.643+0000: starting up libvirt version: 4.5.0, package: 35.3.module_el8.1.0+297+df420408 (CentOS Buildsys <bugs(a)centos.org>, 2020-04-10-11:06:38, ), qemu version: 2.12.0qemu-kvm-2.12.0-88.module_el8.1.0+297+df420408.3, kernel: 4.18.0-80.el8.x86_64, hostname: ..... LC_ALL=C PATH=/var/lib/ci_toolbox:/usr/local/sbin:/usr/bin:/bin:/usr/sbin:/sbin HOME=/root/ovirt-system-tests USER=root LOGNAME=root QEMU_AUDIO_DRV=none /usr/libexec/qemu-kvm -name guest=992415aa-lago-basic-suite-master-engine,debug-threads=on -S -object secret,id=masterKey0,format=raw,file=/var/lib/libvirt/qemu/domain-1-992415aa-lago-basic-/master-key.aes -machine pc-i440fx-rhel7.6.0,accel=kvm,usb=off,vmport=off,dump-guest-core=off -cpu host -m 4096 -realtime mlock=off -smp 2,sockets=2,cores=1,threads=1 -object iothread,id=iothread1 -numa node,nodeid=0,cpus=0,mem=2048 -numa node,nodeid=1,cpus=1,mem=2048 -uuid 10ed4b42-bb14-4b03-a411-c62fb1181c2d -display none -no-user-config -nodefaults -chardev socket,id=charmonitor,fd=31,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown -global PIIX4_PM.disable_s3=1 -global PIIX4_PM.disable_s4=1 -boot menu=off,strict=on -device virtio-scsi-pci,iothread=iothread1,id=scsi0,num_queues=2,bus=pci.0,addr=0x5 -device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x6 -drive file=/root/ovirt-system-tests/deployment-basic-suite-master/default/images/lago-basic-suite-master-engine_root.qcow2,format=qcow2,if=none,id=drive-virtio-disk0,serial=1,cache=writeback,discard=unmap -device virtio-blk-pci,iothread=iothread1,scsi=off,num-queues=1,bus=pci.0,addr=0x7,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1,write-cache=on -drive file=/root/ovirt-system-tests/deployment-basic-suite-master/default/images/lago-basic-suite-master-engine_nfs.raw,format=raw,if=none,id=drive-scsi0-0-0-0,serial=2,cache=writeback,discard=unmap -device scsi-hd,bus=scsi0.0,channel=0,scsi-id=0,lun=0,drive=drive-scsi0-0-0-0,id=scsi0-0-0-0,write-cache=on -drive file=/root/ovirt-system-tests/deployment-basic-suite-master/default/images/lago-basic-suite-master-engine_iscsi.raw,format=raw,if=none,id=drive-scsi0-0-0-2,serial=3,cache=writeback,discard=unmap -device scsi-hd,bus=scsi0.0,channel=0,scsi-id=0,lun=2,drive=drive-scsi0-0-0-2,id=scsi0-0-0-2,write-cache=on -netdev tap,fds=33:34,id=hostnet0,vhost=on,vhostfds=35:36 -device virtio-net-pci,mq=on,vectors=6,netdev=hostnet0,id=net0,mac=54:52:c0:a8:c8:02,bus=pci.0,addr=0x3 -netdev tap,fds=37:38,id=hostnet1,vhost=on,vhostfds=39:40 -device virtio-net-pci,mq=on,vectors=6,netdev=hostnet1,id=net1,mac=54:52:c0:a8:ca:02,bus=pci.0,addr=0x4 -chardev socket,id=charchannel0,fd=41,server,nowait -device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=org.qemu.guest_agent.0 -chardev pty,id=charconsole0 -device virtconsole,chardev=charconsole0,id=console0 -device cirrus-vga,id=video0,bus=pci.0,addr=0x2 -object rng-random,id=objrng0,filename=/dev/urandom -device virtio-rng-pci,rng=objrng0,id=rng0,bus=pci.0,addr=0x9 -sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny -msg timestamp=on 2020-05-13 08:56:51.643+0000: Domain id=1 is tainted: high-privileges 2020-05-13 08:56:51.643+0000: Domain id=1 is tainted: host-cpu libvirt: QEMU Driver error : internal error: Unable to find any /dev mount 2020-05-13 08:56:51.654+0000: shutting down, reason=failed And this one currently is blocking me. Did anyone try such a setup? Any help would be appreciated. Regards, Marcin

1 0

blockcommit --pivot does not succeed in conjunction with qemu 5.0.0
by Thomas Stein 11 May '20

11 May '20

Hello one and all. Got a problem with libvirt 6.2.0 and qemu 5.0.0. virsh blockcommit mymachine vda --active --verbose --pivot works until it shows [100%] but it never actually pivots. It just sits there. Is this a known issue with 6.2.0 and i should try 6.3.0? For now i switched back to qemu 4.2.0 and this seems to solve the issue too. Any hints? Ahoi! t.

2 3

Nested Virtualization on Google Cloud.
by Tanmoy Sinha 10 May '20

10 May '20

I am using nested virtualization on a Google Cloud Compute instance. Things are generally working fine with libvirt using qemu+kvm, however I observed that <cpu mode='host-model'> is not exposing avx and avx2 instruction set to the guest Linux instance. Google Cloud platform claims the CPU model of the host compute instance is Broadwell, however libvirt capabilities maps it to Westmere-IBRS and it has avx and avx2 features, yet host-model is not exposing those. As a workaround, I am using <cpu mode='host-passthrough'>, but I would like to know what is going wrong here? I can also share the output of cpuid of the host system, if that helps. I am not sure whether it's a libvirt issue or something to do with KVM. Any help would be appreciated. Following is the host information, along with the qemu process details for the linux guest. root@dev-vm:~# kvm --version QEMU emulator version 2.8.1(Debian 1:2.8+dfsg-6+deb9u9) Copyright (c) 2003-2016 Fabrice Bellard and the QEMU Project developers root@dev-vm:~# virsh --version setlocale: No such file or directory 3.0.0 root@dev-vm:~# virsh capabilities <capabilities> <host> <uuid>a2b6c5d9-dfea-7efb-defb-3cce3aadb067</uuid> <cpu> <arch>x86_64</arch> <model>*Westmere-IBRS*</model> <vendor>Intel</vendor> <topology sockets='1' cores='4' threads='2'/> <feature name='vme'/> <feature name='ss'/> <feature name='ht'/> <feature name='pclmuldq'/> <feature name='vmx'/> <feature name='fma'/> <feature name='pcid'/> <feature name='x2apic'/> <feature name='movbe'/> <feature name='xsave'/> <feature name='osxsave'/> <feature name='avx'/> <feature name='f16c'/> <feature name='rdrand'/> <feature name='hypervisor'/> <feature name='arat'/> <feature name='fsgsbase'/> <feature name='tsc_adjust'/> <feature name='bmi1'/> <feature name='hle'/> <feature name='avx2'/> <feature name='smep'/> <feature name='bmi2'/> <feature name='erms'/> <feature name='invpcid'/> <feature name='rtm'/> <feature name='rdseed'/> <feature name='adx'/> <feature name='smap'/> <feature name='md-clear'/> <feature name='ssbd'/> <feature name='xsaveopt'/> <feature name='pdpe1gb'/> <feature name='rdtscp'/> <feature name='abm'/> <feature name='3dnowprefetch'/> <feature name='invtsc'/> <pages unit='KiB' size='4'/> <pages unit='KiB' size='2048'/> <pages unit='KiB' size='1048576'/> </cpu> <power_management> <suspend_mem/> <suspend_disk/> <suspend_hybrid/> </power_management> <migration_features> <live/> <uri_transports> <uri_transport>tcp</uri_transport> 15771 ? Sl 0:03 qemu-system-x86_64 -enable-kvm -name guest=Util-LIN-1,debug-threads=on -S -object secret,id=masterKey0,format=raw,file=/var/lib/libvirt/qemu/domain-11-Util-LIN-1/master-key.aes -machine pc-i440fx-2.1,accel=kvm,usb=off,dump-guest-core=off -cpu *Westmere-IBRS* ,+vme,+ss,+ht,+pclmuldq,+vmx,+fma,+pcid,+x2apic,+movbe,+xsave,+osxsave, *+avx,*+f16c,+rdrand,+hypervisor,+arat,+fsgsbase,+tsc_adjust,+bmi1,+hle, *+avx2*,+smep,+bmi2,+erms,+invpcid,+rtm,+rdseed,+adx,+smap,+md-clear,+ssbd,+xsaveopt,+pdpe1gb,+rdtscp,+abm,+3dnowprefetch -m 4096 -realtime mlock=off -smp 4,sockets=4,cores=1,threads=1 -uuid caa60e3c-f946-40a4-80ac-1fb86366c5f6 -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-11-Util-LIN-1/monitor.sock,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown -boot strict=on -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -device ahci,id=sata0,bus=pci.0,addr=0x4 -drive file=/var/lib/libvirt/images/Util-LIN-1/Util-LIN-1.qcow2,format=qcow2,if=none,id=drive-sata0-0-0 -device ide-hd,bus=sata0.0,drive=drive-sata0-0-0,id=sata0-0-0,bootindex=1 -drive file=/var/lib/libvirt/images/Util-LIN-1/Util-LIN-1-acdisk.qcow2,format=qcow2,if=none,id=drive-sata0-0-2 -device ide-hd,bus=sata0.2,drive=drive-sata0-0-2,id=sata0-0-2 -netdev tap,fd=34,id=hostnet0,vhost=on,vhostfd=36 -device virtio-net-pci,netdev=hostnet0,id=net0,mac=1a:b2:ae:f7:69:c7,bus=pci.0,addr=0x3 -chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -device usb-tablet,id=input0,bus=usb.0,port=1 -vnc 0.0.0.0:8 -device cirrus-vga,id=video0,bus=pci.0,addr=0x2 -incoming defer -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5 -msg timestamp=on Regards Tanmoy Sinha

1 0

Libvirt APIs for creating virtual networks
by Santhosh Kumar Gunturu 08 May '20

08 May '20

I am using the Libvirt APIs to create the virtual networks to use the dnsmasq capabilities. I want to understand the APIs how to set the lease time in XML to control the dnsmasq lease time. Also, I need some DHCP statistics on the virtual network. Is there any API available to fetch the statistics ? Please let me know if any ? Thanks & Regards Santhosh Kumar Gunturu

3 6

Further DKIM testing validation
by dberrange＠yahoo.com 07 May '20

07 May '20

Please ignore this mail too.

1 0

Testing email DKIM handling
by dberrange＠yahoo.com 07 May '20

07 May '20

Please ignore this test message. Validating whether the mailing list is still breaking DKIM signed messages.

1 0

virsh connect to xen:///system fails: "error: internal error: Unexpected driver type 'Xen' opened" ?
by PGNet Dev 04 May '20

04 May '20

I'm setting up for libvirt remote access on a xend host. On the host, xl info | egrep "release|xen_version" release : 5.6.10-24.gde48f93-default xen_version : 4.13.0_12-lp151.700 systemctl --version systemd 234 I've installed rpm -qa libvirt-daemon-xen libvirt-daemon-xen-6.2.0-lp151.890.1.x86_64 libvirtd --version libvirtd (libvirt) 6.2.0 virsh --version 6.2.0 Per https://libvirt.org/daemons.html I've setup for use of modular daemons with systemd sockets, rather than monolithic libvirtd systemctl list-units | egrep " virt" virtxend.service loaded active running Virtualization xen daemon virtlockd.socket loaded active listening Virtual machine lock manager socket virtlogd.socket loaded active listening Virtual machine log manager socket virtnetworkd-admin.socket loaded active listening Libvirt network admin socket virtnetworkd-ro.socket loaded active listening Libvirt network local read-only socket virtnetworkd.socket loaded active listening Libvirt network local socket virtnodedevd-admin.socket loaded active listening Libvirt nodedev admin socket virtnodedevd-ro.socket loaded active listening Libvirt nodedev local read-only socket virtnodedevd.socket loaded active listening Libvirt nodedev local socket virtnwfilterd-admin.socket loaded active listening Libvirt nwfilter admin socket virtnwfilterd-ro.socket loaded active listening Libvirt nwfilter local read-only socket virtnwfilterd.socket loaded active listening Libvirt nwfilter local socket virtproxyd-admin.socket loaded active listening Libvirt proxy admin socket virtproxyd-ro.socket loaded active listening Libvirt proxy local read-only socket virtproxyd.socket loaded active listening Libvirt proxy local socket virtsecretd-admin.socket loaded active listening Libvirt secret admin socket virtsecretd-ro.socket loaded active listening Libvirt secret local read-only socket virtsecretd.socket loaded active listening Libvirt secret local socket virtstoraged-admin.socket loaded active listening Libvirt storage admin socket virtstoraged-ro.socket loaded active listening Libvirt storage local read-only socket virtstoraged.socket loaded active listening Libvirt storage local socket virtxend-admin.socket loaded active running Libvirt libxl admin socket virtxend-ro.socket loaded active running Libvirt libxl local read-only socket virtxend.socket loaded active running Libvirt libxl local socket /tree /run/libvirt/ /run/libvirt/ ├── hostdevmgr ├── libvirt-admin-sock ├── libvirt-sock ├── libvirt-sock-ro ├── libxl │ ├── autostarted │ ├── Domain-0.xml │ └── driver.pid ├── network │ ├── autostarted │ └── nwfilter.leases ├── nodedev ├── nwfilter ├── nwfilter-binding ├── qemu │ ├── autostarted │ └── slirp ├── secrets ├── storage │ └── autostarted ├── virtlockd-sock ├── virtlogd-sock ├── virtnetworkd-admin-sock ├── virtnetworkd-sock ├── virtnetworkd-sock-ro ├── virtnodedevd-admin-sock ├── virtnodedevd-sock ├── virtnodedevd-sock-ro ├── virtnwfilterd-admin-sock ├── virtnwfilterd-sock ├── virtnwfilterd-sock-ro ├── virtsecretd-admin-sock ├── virtsecretd-sock ├── virtsecretd-sock-ro ├── virtstoraged-admin-sock ├── virtstoraged-sock ├── virtstoraged-sock-ro ├── virtxend-admin-sock ├── virtxend-sock └── virtxend-sock-ro On the server, TLS certs are in place openssl version OpenSSL 1.1.1g 21 Apr 2020 cat /etc/libvirt/libvirt.conf ca_file = "/sec/ssl/CA/CA.CHAIN.crt.pem" cert_file = "/sec/ssl/libvirt/client.EC.crt.pem" key_file = "/sec/ssl/libvirt/client.EC.key.pem" cat /etc/libvirt/virtproxyd.conf ca_file = "/sec/ssl/CA/CA.CHAIN.crt.pem" cert_file = "/sec/ssl/libvirt/server.EC.crt.pem" key_file = "/sec/ssl/libvirt/server.EC.key.pem" On attempt to first _locally_ connect, virsh -c test:///default list sysinfo Id Name State ---------------------- 1 test running virsh -c test:///default sysinfo <sysinfo type='smbios'> <bios> <entry name='vendor'>LENOVO</entry> <entry name='version'>G4ETA1WW (2.61 )</entry> <entry name='date'>05/07/2014</entry> <entry name='release'>2.61</entry> </bios> </sysinfo> but virsh -c xen:///system?socket=/var/run/libvirt/libvirt-sock error: failed to connect to the hypervisor error: internal error: Unexpected driver type 'Xen' opened What's missing/incorrect in my config, causing the "Unexpected driver" error, and preventing the connect to local hypervisor?

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